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Diffstat (limited to 'core/test-module.c')
| -rw-r--r-- | core/test-module.c | 2853 |
1 files changed, 2853 insertions, 0 deletions
diff --git a/core/test-module.c b/core/test-module.c new file mode 100644 index 0000000..ccb3371 --- /dev/null +++ b/core/test-module.c @@ -0,0 +1,2853 @@ +#define _POSIX_C_SOURCE 200809L +#include "module.h" +#include "module-store.h" +#include "module-text.h" +#include "store.h" +#include <dirent.h> +#include <math.h> +#include <pthread.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/wait.h> +#include <unistd.h> + +#define CHECK(x) do { if (!(x)) { fprintf(stderr, "%s:%d: %s\n", __FILE__, __LINE__, #x); abort(); } } while (0) + +/* Store faults: a stage fails (or the process dies there when crash is set). */ +static int fail_stage = -1; +static int crash; +int pure_store_test_fault(PureStoreStage stage) { + if ((int)stage != fail_stage) return 0; + if (crash) _exit(77); + return 1; +} + +typedef struct { const char *name; double initial; } S; +typedef struct { const char *name; uint32_t type; } F; +/* kind 0 is a key input; otherwise PURE_KIND_MESSAGE with fields. */ +typedef struct { const char *name, *key; int kind; bool keyed; const F *fields; size_t nfields; } I; +#define KEY(name, key) {name, key, 0, false, NULL, 0} +/* A timer's period (milliseconds) rides in nfields. */ +#define TIMER(name, period) {name, NULL, PURE_KIND_TIMER, false, NULL, period} +typedef struct { const char *name; uint32_t start, length; } V; +typedef struct { uint32_t event, start, length; } H; +typedef struct { uint8_t op; uint32_t arg; double value; } O; +/* Text (type 1, ref = constant), cursor (type 2, ref = text state), list + * (type 3, ref = record) and index (type 4, ref = list state) states follow + * the number states; text views follow the number views. */ +typedef struct { const char *name; uint32_t type, ref; } T; /* type: the state type, its flags from bit 8 */ +/* A record field: a number and its default, or text (text = 1) whose + * default is the constant numbered initial. */ +typedef struct { const char *name; uint32_t text; double initial; } RF; +typedef struct { const char *name; const RF *fields; size_t nfields; } R; +/* A further view: a table (type 2, start = list state) or a column of the + * view numbered table - 1. */ +typedef struct { const char *name; uint32_t type, table, start, length; } W; +typedef struct { + const S *s; size_t ns; const I *in; size_t ni; const V *v; size_t nv; + const H *h; size_t nh; const O *o; size_t no; const char *const *c; size_t nc; + const T *t; size_t nt; const char *const *k; size_t nk; const V *tv; size_t ntv; + const R *r; size_t nr; const W *w; size_t nw; +} Spec; + +static unsigned char *put32(unsigned char *p, uint32_t v) { + for (unsigned i = 0; i < 4; ++i) p[i] = (unsigned char)(v >> (8 * i)); + return p + 4; +} + +static unsigned char *put_double(unsigned char *p, double value) { + uint64_t bits; + memcpy(&bits, &value, sizeof(bits)); + put32(p, (uint32_t)bits); + return put32(p + 4, (uint32_t)(bits >> 32)); +} + +/* Test-side encoder for format v5; the toolchain has its own. */ +static size_t build(unsigned char *out, Spec spec) { + unsigned char strings[4096], blob[4096]; + size_t used = 0, blob_used = 0; + const char *text[512]; + uint32_t offset[512]; + size_t names = 0; + for (size_t i = 0; i < spec.ns; ++i) text[names++] = spec.s[i].name; + for (size_t i = 0; i < spec.nt; ++i) text[names++] = spec.t[i].name; + for (size_t i = 0; i < spec.nc; ++i) text[names++] = spec.c[i]; + for (size_t i = 0; i < spec.ni; ++i) { + text[names++] = spec.in[i].name; + if (!spec.in[i].kind) text[names++] = spec.in[i].key; + for (size_t f = 0; spec.in[i].kind != PURE_KIND_TIMER && f < spec.in[i].nfields; ++f) + text[names++] = spec.in[i].fields[f].name; + } + for (size_t i = 0; i < spec.nv; ++i) text[names++] = spec.v[i].name; + for (size_t i = 0; i < spec.ntv; ++i) text[names++] = spec.tv[i].name; + for (size_t i = 0; i < spec.nw; ++i) text[names++] = spec.w[i].name; + size_t record_names = names, record_fields = 0; + for (size_t i = 0; i < spec.nr; ++i) { + text[names++] = spec.r[i].name; + for (size_t f = 0; f < spec.r[i].nfields; ++f) text[names++] = spec.r[i].fields[f].name; + record_fields += spec.r[i].nfields; + } + for (size_t i = 0; i < names; ++i) { + size_t length = strlen(text[i]); + offset[i] = (uint32_t)used; + strings[used++] = (unsigned char)length; + memcpy(strings + used, text[i], length); + used += length; + } + size_t fields = 0; + for (size_t i = 0; i < spec.ni; ++i) fields += spec.in[i].kind == PURE_KIND_TIMER ? 0 : spec.in[i].nfields; + for (size_t i = 0; i < spec.nk; ++i) { memcpy(blob + blob_used, spec.k[i], strlen(spec.k[i])); blob_used += strlen(spec.k[i]); } + unsigned char *p = out; + memset(p, 0, 40); + memcpy(p, "PUREMOD5", 8); + size_t states = spec.ns + spec.nt, views = spec.nv + spec.ntv + spec.nw; + p[8] = (unsigned char)states; p[9] = (unsigned char)(states >> 8); + p[10] = (unsigned char)spec.ni; p[12] = (unsigned char)views; p[14] = (unsigned char)spec.nh; + put32(p + 16, (uint32_t)spec.no); + put32(p + 20, (uint32_t)used); + p[24] = (unsigned char)fields; p[26] = (unsigned char)spec.nc; p[28] = (unsigned char)spec.nk; + p[30] = (unsigned char)spec.nr; p[36] = (unsigned char)record_fields; + put32(p + 32, (uint32_t)blob_used); + p += 40; + size_t n = 0; + for (size_t i = 0; i < spec.ns; ++i) { p = put32(p, offset[n++]); p = put32(p, 0); p = put_double(p, spec.s[i].initial); } + for (size_t i = 0; i < spec.nt; ++i) { + p = put32(p, offset[n++]); + p = put32(p, spec.t[i].type & 0xFF); + p = put32(p, spec.t[i].ref); + p = put32(p, spec.t[i].type >> 8); + } + for (size_t i = 0; i < spec.nc; ++i) { p = put32(p, offset[n++]); p = put32(p, 1); p = put32(p, 1); } + uint32_t field_offsets[64], field_start = 0; + size_t nf = 0; + for (size_t i = 0; i < spec.ni; ++i) { + const I *in = &spec.in[i]; + p = put32(p, offset[n++]); + *p++ = (unsigned char)(in->kind ? in->kind : 1); *p++ = in->keyed; *p++ = 0; *p++ = 0; + bool timer = in->kind == PURE_KIND_TIMER; + p = put32(p, timer ? (uint32_t)in->nfields : in->kind ? 0 : offset[n++]); + uint32_t first = in->kind == PURE_KIND_MESSAGE || in->kind == PURE_KIND_OUTPUT ? field_start : 0; /* only messages and outputs have fields */ + *p++ = (unsigned char)first; *p++ = (unsigned char)(first >> 8); + *p++ = (unsigned char)(timer ? 0 : in->nfields); *p++ = 0; + for (size_t f = 0; !timer && f < in->nfields; ++f) field_offsets[nf++] = offset[n++]; + field_start += timer ? 0 : (uint32_t)in->nfields; + } + nf = 0; + for (size_t i = 0; i < spec.ni; ++i) + for (size_t f = 0; spec.in[i].kind != PURE_KIND_TIMER && f < spec.in[i].nfields; ++f) { + p = put32(p, field_offsets[nf++]); + p = put32(p, spec.in[i].fields[f].type); + } + for (size_t i = 0, at = 0; i < spec.nk; ++i) { p = put32(p, (uint32_t)at); p = put32(p, (uint32_t)strlen(spec.k[i])); at += strlen(spec.k[i]); } + size_t record_field = record_names; + for (size_t i = 0, first = 0; i < spec.nr; ++i) { + p = put32(p, offset[record_field]); + record_field += 1 + spec.r[i].nfields; + *p++ = (unsigned char)first; *p++ = 0; *p++ = (unsigned char)spec.r[i].nfields; *p++ = 0; + first += spec.r[i].nfields; + } + for (size_t i = 0, n = record_names; i < spec.nr; ++i, ++n) + for (size_t f = 0; f < spec.r[i].nfields; ++f) { + const RF *field = &spec.r[i].fields[f]; + p = put32(p, offset[++n]); + p = put32(p, field->text); + if (field->text) { p = put32(p, (uint32_t)field->initial); p = put32(p, 0); } + else p = put_double(p, field->initial); + } + for (size_t i = 0; i < spec.nv; ++i) { p = put32(p, offset[n++]); p = put32(p, 0); p = put32(p, spec.v[i].start); p = put32(p, spec.v[i].length); } + for (size_t i = 0; i < spec.ntv; ++i) { p = put32(p, offset[n++]); p = put32(p, 1); p = put32(p, spec.tv[i].start); p = put32(p, spec.tv[i].length); } + for (size_t i = 0; i < spec.nw; ++i) { + const W *w = &spec.w[i]; + p = put32(p, offset[n++]); + *p++ = (unsigned char)w->type; *p++ = (unsigned char)(w->type >> 8); /* a filtered table: its list + 1 */ + *p++ = (unsigned char)w->table; *p++ = (unsigned char)(w->table >> 8); + p = put32(p, w->start); + p = put32(p, w->length); + } + for (size_t i = 0; i < spec.nh; ++i) { p = put32(p, spec.h[i].event); p = put32(p, spec.h[i].start); p = put32(p, spec.h[i].length); } + for (size_t i = 0; i < spec.no; ++i) { + *p++ = spec.o[i].op; *p++ = 0; *p++ = 0; *p++ = 0; + p = put32(p, spec.o[i].arg); + p = put_double(p, spec.o[i].value); + } + memcpy(p, strings, used); + memcpy(p + used, blob, blob_used); + return (size_t)(p + used + blob_used - out); +} + +static PureModule module_a, module_b; +static char error[128]; + +static PureResult load(Spec spec, PureModule *out) { + static unsigned char bytes[65536]; + size_t size = build(bytes, spec); + return pure_module_load(bytes, size, out, error, sizeof(error)); +} + +#define LEN(a) (sizeof(a) / sizeof(*(a))) +#define SPEC(s, in, v, h, o) ((Spec){s, LEN(s), in, LEN(in), v, LEN(v), h, LEN(h), o, LEN(o), NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0}) + +enum { C = PURE_OP_CONST, L = PURE_OP_LOAD, DT = PURE_OP_DT, ADD = PURE_OP_ADD, + MUL = PURE_OP_MUL, DIV = PURE_OP_DIV, GT = PURE_OP_GT, MIN = PURE_OP_MIN, + MAX = PURE_OP_MAX, CL = PURE_OP_CLAMP, ST = PURE_OP_STORE, JZ = PURE_OP_JZ, + JMP = PURE_OP_JMP, NEG = PURE_OP_NEG }; + +static const S counter_states[] = {{"count", 0}, {"x", 3}}; +static const I counter_inputs[] = {KEY("tap", "Space"), KEY("move", "ArrowRight")}; +static const V counter_views[] = {{"label", 0, 1}, {"width", 1, 6}}; +static const O counter_code[] = { + {L, 0, 0}, /* 0 view label */ + {C, 0, 40}, {L, 0, 0}, {C, 0, 20}, {MIN, 0, 0}, {C, 0, 8}, /* 1 view width */ + {MUL, 0, 0}, + /* 7: fixed-up below: 40 + min(count, 20) * 8 needs an ADD; see width2 */ + {L, 0, 0}, {C, 0, 1}, {ADD, 0, 0}, {ST, 0, 0}, /* 7 tap.down */ + /* 11 move.down: if x > 5 { x = 0 } else { x = x + 1 } */ + {L, 1, 0}, {C, 0, 5}, {GT, 0, 0}, {JZ, 18, 0}, {C, 0, 0}, {ST, 1, 0}, {JMP, 22, 0}, + {L, 1, 0}, {C, 0, 1}, {ADD, 0, 0}, {ST, 1, 0}, + /* 22 frame: x = x + dt */ + {L, 1, 0}, {DT, 0, 0}, {ADD, 0, 0}, {ST, 1, 0}, + /* 26 view width2 = 40 + min(count, 20) * 8 */ + {C, 0, 40}, {L, 0, 0}, {C, 0, 20}, {MIN, 0, 0}, {C, 0, 8}, {MUL, 0, 0}, {ADD, 0, 0}, +}; +static const H counter_handlers[] = {{1, 7, 4}, {3, 11, 11}, {0, 22, 4}}; + +static void behaviour(void) { + /* width at 1..7 leaves two values: rejected at load. */ + CHECK(load(SPEC(counter_states, counter_inputs, counter_views, counter_handlers, counter_code), &module_a) == PURE_INVALID); + CHECK(strstr(error, "view must leave one value of its type")); + static const V views[] = {{"label", 0, 1}, {"width", 26, 7}}; + CHECK(load(SPEC(counter_states, counter_inputs, views, counter_handlers, counter_code), &module_a) == PURE_OK); + PureApp app; + CHECK(pure_app_start(&app, &module_a, (PureData){0}) == PURE_OK); + double value; + CHECK(pure_app_view(&app, 1, &value) && value == 40); + for (int i = 0; i < 25; ++i) CHECK(pure_app_input(&app, 0, PURE_EDGE_DOWN) == PURE_OK); + CHECK(app.values[0] == 25 && pure_app_view(&app, 1, &value) && value == 200); + CHECK(pure_app_input(&app, 0, PURE_EDGE_UP) == PURE_OK && app.events == 26); + /* if / else with forward JZ and JMP */ + CHECK(pure_app_input(&app, 1, PURE_EDGE_DOWN) == PURE_OK && app.values[1] == 4); + CHECK(pure_app_input(&app, 1, PURE_EDGE_DOWN) == PURE_OK && app.values[1] == 5); + CHECK(pure_app_input(&app, 1, PURE_EDGE_DOWN) == PURE_OK && app.values[1] == 6); + CHECK(pure_app_input(&app, 1, PURE_EDGE_DOWN) == PURE_OK && app.values[1] == 0); + CHECK(pure_app_frame(&app) == PURE_OK && app.values[1] == 1.0 / 60.0 && app.ticks == 1); + CHECK(pure_app_input(&app, 2, PURE_EDGE_DOWN) == PURE_INVALID); + CHECK(pure_module_input(&module_a, "move") == 1 && pure_module_view(&module_a, "width") == 1 && + pure_module_state(&module_a, "missing") == -1); + + /* Replacement keeps values by name. */ + static const S next_states[] = {{"fresh", 7}, {"count", 99}}; + static const I no_inputs[1]; + static const V no_views[1]; + static const H no_handlers[1]; + static const O no_code[1]; + CHECK(load((Spec){next_states, 2, no_inputs, 0, no_views, 0, no_handlers, 0, no_code, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0}, &module_b) == PURE_OK); + CHECK(pure_app_replace(&app, &module_b) == PURE_OK); + CHECK(app.module == &module_b && app.values[0] == 7 && app.values[1] == 25); + CHECK(pure_app_replace(&app, &module_a) == PURE_OK); + CHECK(app.values[0] == 25 && app.values[1] == 3); + pure_app_stop(&app); +} + +/* A fault leaves every state exactly as before the event. */ +static void faults(void) { + static const S states[] = {{"a", 1}, {"b", 2}}; + static const I inputs[] = {KEY("one", "KeyA"), KEY("two", "KeyB"), KEY("three", "Digit3")}; + static const O code[] = { + {C, 0, 9}, {ST, 0, 0}, {C, 0, 1}, {C, 0, 0}, {DIV, 0, 0}, {ST, 1, 0}, /* 0 divide */ + {C, 0, 9}, {ST, 0, 0}, {C, 0, 1e308}, {C, 0, 10}, {MUL, 0, 0}, {ST, 1, 0}, /* 6 overflow */ + {C, 0, 9}, {ST, 0, 0}, {C, 0, 1}, {C, 0, 3}, {C, 0, 2}, {CL, 0, 0}, {ST, 1, 0}, /* 12 clamp */ + {C, 0, 5}, {ST, 0, 0}, /* 19 ok */ + {C, 0, 0}, {NEG, 0, 0}, {C, 0, 0}, {MIN, 0, 0}, /* 21 view -0 */ + {C, 0, 0}, {C, 0, 0}, {NEG, 0, 0}, {MAX, 0, 0}, /* 25 view +0 */ + }; + static const H handlers[] = {{1, 0, 6}, {3, 6, 6}, {5, 12, 7}, {5, 19, 2}}; + static const V views[] = {{"low", 21, 4}, {"high", 25, 4}}; + CHECK(load(SPEC(states, inputs, views, handlers, code), &module_a) == PURE_OK); + PureApp app; + CHECK(pure_app_start(&app, &module_a, (PureData){0}) == PURE_OK); + const PureFault expected[] = {PURE_FAULT_DIVIDE, PURE_FAULT_NON_FINITE, PURE_FAULT_CLAMP}; + for (uint32_t i = 0; i < 3; ++i) { + CHECK(pure_app_input(&app, i, PURE_EDGE_DOWN) == PURE_INVALID && app.fault == expected[i]); + CHECK(app.values[0] == 1 && app.values[1] == 2 && app.events == 0); + } + /* A later handler of the same event does not run after a fault. */ + CHECK(app.fault_pc == 17); + double value; + CHECK(pure_app_view(&app, 0, &value) && value == 0 && signbit(value)); + CHECK(pure_app_view(&app, 1, &value) && value == 0 && !signbit(value)); + pure_app_stop(&app); +} + +typedef struct { const char *reason; Spec spec; PureResult result; } Rejection; + +static void rejections(void) { + static const S s1[] = {{"a", 0}}; + static const S dup[] = {{"a", 0}, {"a", 1}}; + static const S bad_name[] = {{"1a", 0}}; + static const S long_name[] = {{"abcdefghijklmnopqrstuvwxyz012345", 0}}; + static const S non_finite[] = {{"a", INFINITY}}; + static const I i1[] = {KEY("k", "Space")}; + static const I bad_key[] = {KEY("k", "KeyAA")}; + static const I dup_key[] = {KEY("k", "Space"), KEY("j", "Space")}; + static const V clash[] = {{"a", 0, 1}}; + static const V v_store[] = {{"v", 0, 2}}; + static const V v_dt[] = {{"v", 2, 1}}; + static const V v_empty[] = {{"v", 0, 0}}; + static const H none[1]; + static const O load_a[] = {{L, 0, 0}}; + static const O store[] = {{C, 0, 1}, {ST, 0, 0}, {DT, 0, 0}}; + static const H h0[] = {{0, 0, 2}}; + static const H h_bad_event[] = {{3, 0, 2}}; + static const O back[] = {{C, 0, 1}, {JZ, 0, 0}}; + static const O beyond[] = {{C, 0, 1}, {JZ, 3, 0}}; + static const O under[] = {{ADD, 0, 0}}; + static const O join[] = {{C, 0, 1}, {JZ, 4, 0}, {C, 0, 1}, {C, 0, 1}, {ST, 0, 0}}; + static const O leftover[] = {{C, 0, 1}, {C, 0, 2}}; + static const O unknown_state[] = {{L, 1, 0}, {ST, 0, 0}}; + static const O nan_const[] = {{C, 0, NAN}, {ST, 0, 0}}; + static const O noncanon[] = {{C, 0, 1}, {NEG, 1, 0}, {ST, 0, 0}}; + static const O unreachable[] = {{JMP, 2, 0}, {C, 0, 1}, {C, 0, 1}, {ST, 0, 0}}; + static const O bad_op[] = {{99, 0, 0}, {ST, 0, 0}}; + static const H h_all[] = {{0, 0, 1}}; + static const H h_two[] = {{0, 0, 2}}; + static const H h_five[] = {{0, 0, 5}}; + static const H h_four[] = {{0, 0, 4}}; + O overflow[66]; + for (int i = 0; i < 65; ++i) overflow[i] = (O){C, 0, 1}; + overflow[65] = (O){ST, 0, 0}; + const Rejection cases[] = { + {"duplicate name", {dup, 2, i1, 0, clash, 0, none, 0, load_a, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0}, PURE_INVALID}, + {"state name", {bad_name, 1, i1, 0, clash, 0, none, 0, load_a, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0}, PURE_INVALID}, + {"state name", {long_name, 1, i1, 0, clash, 0, none, 0, load_a, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0}, PURE_INVALID}, + {"non-finite initial value", {non_finite, 1, i1, 0, clash, 0, none, 0, load_a, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0}, PURE_INVALID}, + {"input key", {s1, 1, bad_key, 1, clash, 0, none, 0, load_a, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0}, PURE_INVALID}, + {"duplicate key", {s1, 1, dup_key, 2, clash, 0, none, 0, load_a, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0}, PURE_INVALID}, + {"duplicate name", {s1, 1, i1, 0, clash, 1, none, 0, load_a, 1, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0}, PURE_INVALID}, + {"view with an effect", {s1, 1, i1, 0, v_store, 1, none, 0, store, 3, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0}, PURE_INVALID}, + {"view with an effect", {s1, 1, i1, 0, v_dt, 1, none, 0, store, 3, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0}, PURE_INVALID}, + {"empty view", {s1, 1, i1, 0, v_empty, 1, none, 0, store, 3, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0}, PURE_INVALID}, + {"handler event", {s1, 1, i1, 1, clash, 0, h_bad_event, 1, store, 3, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0}, PURE_INVALID}, + {"branch not forward", {s1, 1, i1, 0, clash, 0, h_two, 1, back, 2, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0}, PURE_INVALID}, + {"branch not forward", {s1, 1, i1, 0, clash, 0, h_two, 1, beyond, 2, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0}, PURE_INVALID}, + {"stack underflow", {s1, 1, i1, 0, clash, 0, h_all, 1, under, 1, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0}, PURE_INVALID}, + {"join with different stacks", {s1, 1, i1, 0, clash, 0, h_five, 1, join, 5, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0}, PURE_INVALID}, + {"handler must leave no value", {s1, 1, i1, 0, clash, 0, h_two, 1, leftover, 2, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0}, PURE_INVALID}, + {"no such state", {s1, 1, i1, 0, clash, 0, h_two, 1, unknown_state, 2, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0}, PURE_INVALID}, + {"non-canonical operand", {s1, 1, i1, 0, clash, 0, h_two, 1, nan_const, 2, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0}, PURE_INVALID}, + {"non-canonical operand", {s1, 1, i1, 0, clash, 0, h0, 1, noncanon, 3, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0}, PURE_INVALID}, + {"unreachable instruction", {s1, 1, i1, 0, clash, 0, h_four, 1, unreachable, 4, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0}, PURE_INVALID}, + {"unknown opcode", {s1, 1, i1, 0, clash, 0, h_two, 1, bad_op, 2, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0}, PURE_INVALID}, + {"stack overflow", {s1, 1, i1, 0, clash, 0, (H[]){{0, 0, 66}}, 1, overflow, 66, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0}, PURE_INVALID}, + }; + for (size_t i = 0; i < LEN(cases); ++i) { + PureResult result = load(cases[i].spec, &module_a); + if (result != cases[i].result || !strstr(error, cases[i].reason)) { + fprintf(stderr, "case %zu: expected '%s', got %d '%s'\n", i, cases[i].reason, (int)result, error); + abort(); + } + } + static S many[33]; + static char many_names[33][8]; + for (unsigned i = 0; i < 33; ++i) { snprintf(many_names[i], 8, "s%u", i % 100u); many[i] = (S){many_names[i], 0}; } + CHECK(load((Spec){many, 33, i1, 0, clash, 0, none, 0, load_a, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0}, &module_a) == PURE_LIMIT); + static unsigned char bytes[65536]; + size_t size = build(bytes, (Spec){s1, 1, i1, 0, clash, 0, none, 0, load_a, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0}); + CHECK(pure_module_load(bytes, size - 1, &module_a, error, sizeof(error)) == PURE_INVALID); + CHECK(pure_module_load(bytes, size + 1, &module_a, error, sizeof(error)) == PURE_INVALID); + bytes[0] = 'X'; + CHECK(pure_module_load(bytes, size, &module_a, error, sizeof(error)) == PURE_INVALID); +} + +static uint32_t next_random(uint32_t *state) { + *state ^= *state << 13; + *state ^= *state >> 17; + *state ^= *state << 5; + return *state; +} + +/* Arbitrary damage is either rejected or yields a module that runs safely. */ +static void mutations(void) { + static const V views[] = {{"label", 0, 1}, {"width", 26, 7}}; + static unsigned char valid[65536], bytes[65536]; + size_t size = build(valid, SPEC(counter_states, counter_inputs, views, counter_handlers, counter_code)); + uint32_t state = 0x2545f491u; + unsigned accepted = 0; + for (unsigned round = 0; round < 20000; ++round) { + memcpy(bytes, valid, size); + unsigned flips = 1 + next_random(&state) % 4; + for (unsigned f = 0; f < flips; ++f) + bytes[next_random(&state) % size] ^= (unsigned char)(1u << (next_random(&state) % 8)); + if (pure_module_load(bytes, size, &module_a, error, sizeof(error)) != PURE_OK) continue; + ++accepted; + PureApp app; + CHECK(pure_app_start(&app, &module_a, (PureData){0}) == PURE_OK); + for (unsigned e = 0; e < 16; ++e) { + if (e % 3 == 0) pure_app_frame(&app); + else pure_app_input(&app, e % 4, e & 1 ? PURE_EDGE_UP : PURE_EDGE_DOWN); + for (uint32_t v = 0; v < module_a.views; ++v) { double value; pure_app_view(&app, v, &value); } + for (uint32_t s = 0; s < module_a.states; ++s) CHECK(isfinite(app.values[s])); + } + pure_app_stop(&app); + } + printf("{\"module_mutations\":20000,\"accepted_after_damage\":%u}\n", accepted); +} + +static Spec editor_spec; + +/* An in-memory data host: every splice makes a new immutable version. */ +typedef struct { char key[65]; unsigned char *bytes; size_t size; int64_t revision; } Stored; +typedef struct { + Stored docs[8]; + size_t count, limit; + bool busy; + unsigned opened, closed; +} Memory; +typedef struct { + Memory *memory; + int index; /* -1 for an absent key */ + int64_t base; + unsigned char *versions[64]; + size_t sizes[64], count; +} Doc; + +static Stored *stored(Memory *m, const char *key) { + for (size_t i = 0; i < m->count; ++i) if (!strcmp(m->docs[i].key, key)) return &m->docs[i]; + return NULL; +} + +static PureResult fake_open(void *context, uint32_t collection, const char *key, void **out, int64_t *revision) { + Memory *m = context; + CHECK(collection == 0); + Doc *d = calloc(1, sizeof(*d)); + Stored *s = stored(m, key); + d->memory = m; + d->index = s ? (int)(s - m->docs) : -1; + if (!s) { + CHECK(m->count < 8); + d->index = (int)m->count; + snprintf(m->docs[m->count++].key, 65, "%s", key); + s = &m->docs[d->index]; + } + d->base = s->revision; + d->versions[0] = malloc(s->size + 1); + memcpy(d->versions[0], s->bytes ? s->bytes : (unsigned char *)"", s->size); + d->sizes[0] = s->size; + d->count = 1; + ++m->opened; + *out = d; + *revision = s->revision; + return PURE_OK; +} + +static PureVersion fake_version(void *context, void *document) { + (void)context; + Doc *d = document; + return (PureVersion){d->count - 1, d->sizes[d->count - 1]}; +} + +/* Two spans per read, so replies arrive in pieces. */ +static PureResult fake_read(void *context, void *document, PureVersion at, size_t offset, size_t length, + bool (*visit)(void *, PureSpan), void *visit_context) { + (void)context; + Doc *d = document; + CHECK(at.ref < d->count && at.bytes == d->sizes[at.ref] && offset + length <= at.bytes); + size_t half = length / 2; + if (half && !visit(visit_context, (PureSpan){d->versions[at.ref] + offset, half})) return PURE_OK; + if (length - half) visit(visit_context, (PureSpan){d->versions[at.ref] + offset + half, length - half}); + return PURE_OK; +} + +static PureResult fake_splice(void *context, void *document, size_t offset, size_t remove, PureSpan insert) { + Memory *m = context; + Doc *d = document; + size_t size = d->sizes[d->count - 1], next = size - remove + insert.size; + if (next > m->limit) return PURE_LIMIT; + CHECK(d->count < 64); + unsigned char *bytes = malloc(next + 1); + memcpy(bytes, d->versions[d->count - 1], offset); + if (insert.size) memcpy(bytes + offset, insert.data, insert.size); + memcpy(bytes + offset + insert.size, d->versions[d->count - 1] + offset + remove, size - offset - remove); + d->versions[d->count] = bytes; + d->sizes[d->count++] = next; + return PURE_OK; +} + +static PureResult fake_commit(void *context, void *document, int64_t *revision) { + Memory *m = context; + Doc *d = document; + Stored *s = &m->docs[d->index]; + *revision = s->revision; + if (m->busy) return PURE_BUSY; + if (s->revision != d->base) return PURE_CONFLICT; + free(s->bytes); + s->size = d->sizes[d->count - 1]; + s->bytes = malloc(s->size + 1); + memcpy(s->bytes, d->versions[d->count - 1], s->size); + *revision = ++s->revision; + /* Like a tree draft, a commit rebases: earlier versions are gone. */ + for (size_t i = 0; i + 1 < d->count; ++i) { free(d->versions[i]); d->versions[i] = NULL; d->sizes[i] = 0; } + d->versions[0] = d->versions[d->count - 1]; + d->sizes[0] = d->sizes[d->count - 1]; + d->count = 1; + d->base = s->revision; + return PURE_OK; +} + +static void fake_close(void *context, void *document) { + Memory *m = context; + Doc *d = document; + for (size_t i = 0; i < d->count; ++i) free(d->versions[i]); + free(d); + ++m->closed; +} + +static PureData fake_data(Memory *m) { + return (PureData){m, fake_open, fake_version, fake_read, fake_splice, fake_commit, fake_close, NULL, NULL}; +} + +typedef struct { unsigned char bytes[256]; size_t size, spans; } Collected; + +static bool count_bytes(void *context, PureSpan span) { + *(size_t *)context += span.size; + return true; +} + +static bool collect(void *context, PureSpan span) { + Collected *c = context; + CHECK(c->size + span.size <= sizeof(c->bytes)); + memcpy(c->bytes + c->size, span.data, span.size); + c->size += span.size; + ++c->spans; + return true; +} + +static bool replied(const PureApp *app, const char *text) { + Collected c = {{0}, 0, 0}; + CHECK(pure_app_reply(app, collect, &c) == PURE_OK); + return c.size == strlen(text) && !memcmp(c.bytes, text, c.size); +} + +static PureSpan edit_payload(unsigned char *buffer, uint32_t start, uint32_t remove, const char *insert) { + put32(buffer, start); + put32(buffer + 4, remove); + memcpy(buffer + 8, insert, strlen(insert)); + return (PureSpan){buffer, 8 + strlen(insert)}; +} + +enum { FIELD = PURE_OP_FIELD, DOC = PURE_OP_DOC, SIZE = PURE_OP_DOC_SIZE, LEN_ = PURE_OP_LEN, + REPL = PURE_OP_REPLACE, REPLY = PURE_OP_REPLY, REQ = PURE_OP_REQUIRE, LE = PURE_OP_LE }; + +/* The document editor as a module: show replies the document, edit splices + * start .. start + remove with insert, replies insert and counts edits. A + * keep message replies the document read before its own edit; guarded edits + * require the final size to stay within 8 bytes. */ +static void messages(void) { + static const F edit_fields[] = {{"start", 1}, {"remove", 1}, {"insert", 2}}; + static const I inputs[] = { + {"show", NULL, PURE_KIND_MESSAGE, true, NULL, 0}, + {"edit", NULL, PURE_KIND_MESSAGE, true, edit_fields, 3}, + {"keep", NULL, PURE_KIND_MESSAGE, true, edit_fields + 2, 1}, + {"guarded", NULL, PURE_KIND_MESSAGE, true, edit_fields, 3}, + KEY("tick", "Space"), + }; + static const S states[] = {{"edits", 0}}; + static const char *const collections[] = {"documents"}; + static const O code[] = { + {DOC, 0, 0}, {REPLY, 0, 0}, /* 0 show */ + {FIELD, 0, 0}, {FIELD, 0, 0}, {FIELD, 1, 0}, {ADD, 0, 0}, {FIELD, 2, 0}, /* 2 edit */ + {REPL, 0, 0}, {FIELD, 2, 0}, {REPLY, 0, 0}, {L, 0, 0}, {C, 0, 1}, {ADD, 0, 0}, {ST, 0, 0}, + {DOC, 0, 0}, {REPLY, 0, 0}, {C, 0, 0}, {C, 0, 0}, {FIELD, 0, 0}, {REPL, 0, 0}, /* 14 keep: prepend */ + {FIELD, 0, 0}, {FIELD, 0, 0}, {FIELD, 1, 0}, {ADD, 0, 0}, {FIELD, 2, 0}, /* 20 guarded */ + {REPL, 0, 0}, {L, 0, 0}, {C, 0, 1}, {ADD, 0, 0}, {ST, 0, 0}, + {SIZE, 0, 0}, {C, 0, 8}, {LE, 0, 0}, {REQ, 0, 0}, + }; + static const H handlers[] = {{1, 0, 2}, {3, 2, 12}, {5, 14, 6}, {7, 20, 14}}; + static const V views[] = {{"count", 0, 0}}; + Spec spec = {states, 1, inputs, 5, views, 0, handlers, 4, code, LEN(code), collections, 1, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0}; + editor_spec = spec; + PureResult loaded = load(spec, &module_a); + if (loaded != PURE_OK) { fprintf(stderr, "%s\n", error); abort(); } + Memory memory = {.limit = 100}; + PureApp app; + CHECK(pure_app_start(&app, &module_a, fake_data(&memory)) == PURE_OK); + unsigned char buffer[64]; + + CHECK(pure_app_message(&app, 0, "doc", -1, (PureSpan){0}) == PURE_NOT_FOUND && app.revision == 0); + CHECK(pure_app_message(&app, 1, "doc", 0, edit_payload(buffer, 0, 0, "hello")) == PURE_OK); + CHECK(app.revision == 1 && replied(&app, "hello") && app.values[0] == 1); + CHECK(pure_app_message(&app, 0, "doc", -1, (PureSpan){0}) == PURE_OK && app.revision == 1 && replied(&app, "hello")); + /* stale base conflicts before bounds; bounds fail as limit; nothing changes */ + CHECK(pure_app_message(&app, 1, "doc", 0, edit_payload(buffer, 99, 0, "x")) == PURE_CONFLICT && app.revision == 1); + CHECK(pure_app_message(&app, 1, "doc", 1, edit_payload(buffer, 99, 0, "x")) == PURE_LIMIT && app.revision == 1); + CHECK(pure_app_message(&app, 1, "doc", 1, edit_payload(buffer, 2, 9, "x")) == PURE_LIMIT); + CHECK(pure_app_message(&app, 1, "doc", 1, (PureSpan){buffer, 7}) == PURE_LIMIT && app.revision == 0); + CHECK(pure_app_message(&app, 1, "doc", -1, edit_payload(buffer, 0, 0, "x")) == PURE_INVALID); + CHECK(pure_app_message(&app, 1, "bad/key", 1, edit_payload(buffer, 0, 0, "x")) == PURE_INVALID); + CHECK(pure_app_message(&app, 4, "doc", 1, (PureSpan){0}) == PURE_INVALID); + CHECK(memory.docs[0].revision == 1 && memory.docs[0].size == 5 && app.values[0] == 1); + /* A busy commit changes neither the document nor the states. */ + memory.busy = true; + CHECK(pure_app_message(&app, 1, "doc", 1, edit_payload(buffer, 5, 0, "!")) == PURE_BUSY); + memory.busy = false; + CHECK(memory.docs[0].size == 5 && app.values[0] == 1 && app.events == 2); + /* The size limit of the data host fails as limit. */ + memory.limit = 6; + CHECK(pure_app_message(&app, 1, "doc", 1, edit_payload(buffer, 5, 0, "!!")) == PURE_LIMIT); + memory.limit = 100; + /* A reply read before the event's own edit keeps its content after commit. */ + CHECK(pure_app_message(&app, 2, "doc", 1, (PureSpan){(const unsigned char *)">> ", 3}) == PURE_OK); + CHECK(app.revision == 2 && replied(&app, "hello")); + CHECK(pure_app_message(&app, 0, "doc", -1, (PureSpan){0}) == PURE_OK && replied(&app, ">> hello")); + /* require: an edit that would exceed 8 bytes changes nothing */ + CHECK(pure_app_message(&app, 3, "doc", 2, edit_payload(buffer, 8, 0, "!")) == PURE_LIMIT); + CHECK(memory.docs[0].size == 8 && app.values[0] == 1); + CHECK(pure_app_message(&app, 3, "doc", 2, edit_payload(buffer, 0, 3, "")) == PURE_OK && app.revision == 3); + CHECK(app.values[0] == 2); + /* Another key is its own document. */ + CHECK(pure_app_message(&app, 1, "other", 0, edit_payload(buffer, 0, 0, "abc")) == PURE_OK && app.revision == 1); + pure_app_stop(&app); + CHECK(memory.opened == memory.closed); + for (size_t i = 0; i < memory.count; ++i) free(memory.docs[i].bytes); + + /* Verifier rules for typed operations. */ + static const O field_in_key[] = {{FIELD, 0, 0}, {ST, 0, 0}}; + static const H key_handler[] = {{9, 0, 2}}; + Spec bad = spec; + bad.o = field_in_key; bad.no = 2; bad.h = key_handler; bad.nh = 1; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "message operation outside")); + static const O num_insert[] = {{C, 0, 0}, {C, 0, 0}, {C, 0, 1}, {REPL, 0, 0}}; + static const H edit_handler[] = {{3, 0, 4}}; + bad.o = num_insert; bad.no = 4; bad.h = edit_handler; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "operand type")); + static const O bytes_state[] = {{FIELD, 2, 0}, {ST, 0, 0}}; + static const H edit_handler2[] = {{3, 0, 2}}; + bad.o = bytes_state; bad.no = 2; bad.h = edit_handler2; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "operand type")); + static const O far_field[] = {{FIELD, 3, 0}, {REPLY, 0, 0}}; + bad.o = far_field; bad.h = edit_handler2; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "no such state, field")); + static const I unkeyed[] = {{"note", NULL, PURE_KIND_MESSAGE, false, NULL, 0}}; + static const O doc_read[] = {{DOC, 0, 0}, {REPLY, 0, 0}}; + static const H note_handler[] = {{1, 0, 2}}; + bad = (Spec){states, 1, unkeyed, 1, views, 0, note_handler, 1, doc_read, 2, collections, 1, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0}; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "document operation outside")); + static const F unknown_type[] = {{"insert", 5}, {"start", 1}}; + static const I misplaced[] = {{"edit", NULL, PURE_KIND_MESSAGE, true, unknown_type, 2}}; + bad = (Spec){states, 1, misplaced, 1, views, 0, NULL, 0, NULL, 0, collections, 1, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0}; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "message field")); + static const H even[] = {{2, 0, 0}}; + bad = (Spec){states, 1, inputs, 1, views, 0, even, 1, NULL, 0, collections, 1, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0}; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "handler event")); + static const V field_view[] = {{"v", 0, 1}}; + static const O field_only[] = {{FIELD, 0, 0}}; + bad = (Spec){states, 1, inputs, 2, field_view, 1, NULL, 0, field_only, 1, collections, 1, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0}; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "view with an effect")); + /* A value may cross a join when every path brings the same stack. */ + static const O branch_value[] = {{C, 0, 1}, {C, 0, 1}, {JZ, 3, 0}, {ST, 0, 0}}; + static const O branch_mismatch[] = {{C, 0, 1}, {C, 0, 1}, {JZ, 4, 0}, {C, 0, 2}, {ST, 0, 0}}; + static const H frame_handler[] = {{0, 0, 4}}; + bad = (Spec){states, 1, inputs, 0, views, 0, frame_handler, 1, branch_value, 4, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0}; + CHECK(load(bad, &module_b) == PURE_OK); + static const H frame_five[] = {{0, 0, 5}}; + bad.o = branch_mismatch; bad.no = 5; bad.h = frame_five; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "join with different stacks")); +} + +/* Damaged message modules either fail to load or run messages safely. */ +static void message_mutations(void) { + static unsigned char valid[65536], bytes[65536]; + size_t size = build(valid, editor_spec); + uint32_t state = 0x9e3779b9u; + unsigned accepted = 0; + for (unsigned round = 0; round < 20000; ++round) { + memcpy(bytes, valid, size); + unsigned flips = 1 + next_random(&state) % 3; + for (unsigned f = 0; f < flips; ++f) + bytes[next_random(&state) % size] ^= (unsigned char)(1u << (next_random(&state) % 8)); + if (pure_module_load(bytes, size, &module_b, error, sizeof(error)) != PURE_OK) continue; + ++accepted; + Memory memory = {.limit = 64}; + PureApp app; + CHECK(pure_app_start(&app, &module_b, fake_data(&memory)) == PURE_OK); + unsigned char payload[32]; + for (unsigned e = 0; e < 12; ++e) { + for (size_t k = 0; k < sizeof(payload); ++k) payload[k] = (unsigned char)next_random(&state); + put32(payload, next_random(&state) % 12); + put32(payload + 4, next_random(&state) % 4); + PureSpan span = {payload, next_random(&state) % sizeof(payload)}; + uint32_t input = next_random(&state) % 5; + if (module_b.input[input].kind == PURE_KIND_MESSAGE) { + int64_t base = (int64_t)(next_random(&state) % 4) - 1; + if (pure_app_message(&app, input, "doc", base, span) == PURE_OK) { + size_t reply = 0; + CHECK(pure_app_reply(&app, count_bytes, &reply) == PURE_OK && reply <= 256); + } + } else pure_app_input(&app, input, e & 1 ? PURE_EDGE_UP : PURE_EDGE_DOWN); + pure_app_frame(&app); + for (uint32_t s = 0; s < module_b.states; ++s) CHECK(isfinite(app.values[s])); + } + pure_app_stop(&app); + CHECK(memory.opened == memory.closed); + for (size_t i = 0; i < memory.count; ++i) free(memory.docs[i].bytes); + } + printf("{\"message_module_mutations\":20000,\"accepted_after_damage\":%u}\n", accepted); +} + +static Spec text_spec; + +typedef struct { char text[256]; size_t size; } Text; + +static bool text_span(void *context, PureSpan span) { + Text *t = context; + CHECK(t->size + span.size < sizeof(t->text)); + memcpy(t->text + t->size, span.data, span.size); + t->size += span.size; + t->text[t->size] = 0; + return true; +} + +static const char *view_text(PureApp *app, uint32_t view) { + static Text t; + t.size = 0; + t.text[0] = 0; + CHECK(pure_app_view_text(app, view, text_span, &t) == PURE_OK); + return t.text; +} + +static const char *state_text(const PureApp *app, uint32_t state) { + static Text t; + t.size = 0; + t.text[0] = 0; + CHECK(pure_draft_read(app->texts[state], 0, pure_draft_size(app->texts[state]), text_span, &t) == PURE_OK); + return t.text; +} + +static double number_view(PureApp *app, uint32_t view) { + double value; + CHECK(pure_app_view(app, view, &value)); + return value; +} + +enum { CUL = PURE_OP_CUR_LOAD, CS = PURE_OP_CUR_STORE, CM = PURE_OP_CUR_MOVE, TI = PURE_OP_TEXT_INPUT, + TINS = PURE_OP_TEXT_INSERT, TREM = PURE_OP_TEXT_REMOVE, TL = PURE_OP_TEXT_LOAD, TK = PURE_OP_TEXT_CONST, + CHR = PURE_OP_CHARS, NT = PURE_OP_NUM_TEXT, CAT = PURE_OP_CONCAT, TLN = PURE_OP_TEXT_LINE, + CC = PURE_OP_CUR_COUNT, CST = PURE_OP_CUR_START }; + +/* A small text editor module: states edits (num), note (text), at (cursor in + * note), title (text). The runtime keeps at on character boundaries and + * moves it with edits; a failed event restores text and cursor. */ +static void texts(void) { + static const S nums[] = {{"edits", 0}}; + static const T textual[] = {{"note", 1, 0}, {"at", 2, 1}, {"title", 1, 1}}; + static const char *const constants[] = {"\xea\xb0\x80" "a\nbc", "\xeb\xa9\x94\xeb\xaa\xa8", "XYZ", + " \xc2\xb7 ", "\xec\x9e\x90"}; + static const I inputs[] = { + {"typed", NULL, PURE_KIND_TEXT, false, NULL, 0}, KEY("left", "ArrowLeft"), KEY("right", "ArrowRight"), + KEY("up", "ArrowUp"), KEY("down", "ArrowDown"), KEY("back", "Backspace"), KEY("home", "Home"), KEY("bad", "KeyB"), + }; + static const O code[] = { + {CUL, 2, 0}, {TI, 0, 0}, {TINS, 1, 0}, {L, 0, 0}, {C, 0, 1}, {ADD, 0, 0}, {ST, 0, 0}, /* 0 typed */ + {CUL, 2, 0}, {C, 0, -1}, {CM, 0, 0}, {CS, 2, 0}, /* 7 left */ + {CUL, 2, 0}, {C, 0, 1}, {CM, 0, 0}, {CS, 2, 0}, /* 11 right */ + {CUL, 2, 0}, {C, 0, -1}, {CM, 1, 0}, {CS, 2, 0}, /* 15 up */ + {CUL, 2, 0}, {C, 0, 1}, {CM, 1, 0}, {CS, 2, 0}, /* 19 down */ + {CUL, 2, 0}, {C, 0, -1}, {CM, 0, 0}, {CUL, 2, 0}, {TREM, 1, 0}, /* 23 back */ + {CST, 1, 0}, {CS, 2, 0}, /* 28 home */ + {CUL, 2, 0}, {TK, 2, 0}, {TINS, 1, 0}, {C, 0, 1}, {C, 0, 0}, {DIV, 0, 0}, {ST, 0, 0}, /* 30 bad */ + {TL, 1, 0}, {CHR, 0, 0}, /* 37 view chars */ + {CUL, 2, 0}, {CC, 0, 0}, /* 39 view offset */ + {CUL, 2, 0}, {CC, 1, 0}, /* 41 view line_no */ + {CUL, 2, 0}, {TLN, 1, 0}, /* 43 view line */ + {TL, 3, 0}, {TK, 3, 0}, {CAT, 0, 0}, {TL, 1, 0}, {CHR, 0, 0}, {NT, 0, 0}, {CAT, 0, 0}, + {TK, 4, 0}, {CAT, 0, 0}, /* 45 view header */ + {C, 0, 1}, {C, 0, 3}, {DIV, 0, 0}, {NT, 0, 0}, /* 54 view ratio */ + }; + static const H handlers[] = {{1, 0, 7}, {3, 7, 4}, {5, 11, 4}, {7, 15, 4}, {9, 19, 4}, {11, 23, 5}, + {13, 28, 2}, {15, 30, 7}}; + static const V number_views[] = {{"chars", 37, 2}, {"offset", 39, 2}, {"line_no", 41, 2}}; + static const V text_views[] = {{"line", 43, 2}, {"header", 45, 9}, {"ratio", 54, 4}}; + Spec spec = {nums, 1, inputs, LEN(inputs), number_views, 3, handlers, LEN(handlers), code, LEN(code), + NULL, 0, textual, 3, constants, LEN(constants), text_views, 3, NULL, 0, NULL, 0}; + text_spec = spec; + if (load(spec, &module_a) != PURE_OK) { fprintf(stderr, "%s\n", error); abort(); } + PureApp app; + CHECK(pure_app_start(&app, &module_a, (PureData){0}) == PURE_OK); + CHECK(!strcmp(state_text(&app, 1), "\xea\xb0\x80" "a\nbc") && app.values[2] == 0); + for (int i = 0; i < 6; ++i) CHECK(pure_app_input(&app, 2, PURE_EDGE_DOWN) == PURE_OK); + CHECK(app.values[2] == 7); /* stops at the end */ + CHECK(number_view(&app, 0) == 5 && number_view(&app, 2) == 2 && !strcmp(view_text(&app, 3), "bc")); + CHECK(pure_app_input(&app, 3, PURE_EDGE_DOWN) == PURE_OK && app.values[2] == 4); /* up keeps column 2 */ + const char *han = "\xed\x95\x9c"; + CHECK(pure_app_text(&app, 0, (PureSpan){(const unsigned char *)han, 3}) == PURE_OK); + CHECK(!strcmp(state_text(&app, 1), "\xea\xb0\x80" "a\xed\x95\x9c\nbc") && app.values[2] == 7 && app.values[0] == 1); + CHECK(pure_app_input(&app, 5, PURE_EDGE_DOWN) == PURE_OK && app.values[2] == 4); /* back over 3 bytes */ + CHECK(pure_app_input(&app, 5, PURE_EDGE_DOWN) == PURE_OK && app.values[2] == 3); + CHECK(!strcmp(state_text(&app, 1), "\xea\xb0\x80\nbc")); + CHECK(pure_app_input(&app, 1, PURE_EDGE_DOWN) == PURE_OK && app.values[2] == 0); + CHECK(pure_app_input(&app, 1, PURE_EDGE_DOWN) == PURE_OK && app.values[2] == 0); /* stops at the start */ + CHECK(pure_app_input(&app, 5, PURE_EDGE_DOWN) == PURE_OK && app.values[2] == 0); /* nothing before */ + CHECK(pure_app_input(&app, 4, PURE_EDGE_DOWN) == PURE_OK && app.values[2] == 4); /* down to column 0 */ + /* A failing event restores the text, the cursor and the states. */ + CHECK(pure_app_input(&app, 7, PURE_EDGE_DOWN) == PURE_INVALID && app.fault == PURE_FAULT_DIVIDE); + CHECK(!strcmp(state_text(&app, 1), "\xea\xb0\x80\nbc") && app.values[2] == 4 && app.values[0] == 1); + CHECK(!strcmp(view_text(&app, 4), "\xeb\xa9\x94\xeb\xaa\xa8 \xc2\xb7 4\xec\x9e\x90")); + CHECK(!strcmp(view_text(&app, 5), "0.3333333333333333")); + CHECK(pure_app_text(&app, 0, (PureSpan){(const unsigned char *)"\xff", 1}) == PURE_INVALID); + CHECK(pure_app_text(&app, 0, (PureSpan){(const unsigned char *)"\xed\xa0\x80", 3}) == PURE_INVALID); /* surrogate */ + CHECK(pure_app_text(&app, 0, (PureSpan){(const unsigned char *)"\xf0\x9f\x98\x80", 4}) == PURE_OK); + CHECK(app.values[2] == 8 && number_view(&app, 1) == 3); /* offset in characters */ + CHECK(pure_app_input(&app, 1, PURE_EDGE_DOWN) == PURE_OK && app.values[2] == 4); /* back over the emoji */ + CHECK(pure_app_input(&app, 6, PURE_EDGE_DOWN) == PURE_OK && app.values[2] == 0); + /* Replacement keeps the text and its cursor by name. */ + static const S fresh[] = {{"fresh", 7}}; + static const T kept[] = {{"note", 1, 0}, {"at", 2, 1}}; + static const char *const other[] = {"ignored"}; + Spec next = {fresh, 1, inputs, 0, number_views, 0, handlers, 0, code, 0, NULL, 0, kept, 2, other, 1, text_views, 0, NULL, 0, NULL, 0}; + CHECK(load(next, &module_b) == PURE_OK); + CHECK(pure_app_input(&app, 2, PURE_EDGE_DOWN) == PURE_OK && app.values[2] == 3); + CHECK(pure_app_replace(&app, &module_b) == PURE_OK); + CHECK(app.values[0] == 7 && app.values[2] == 3 && !strcmp(state_text(&app, 1), "\xea\xb0\x80\n\xf0\x9f\x98\x80" "bc")); + pure_app_stop(&app); + + /* Verification of text operations. */ + static const T two[] = {{"one", 1, 0}, {"two", 1, 0}, {"c", 2, 1}}; + static const O wrong_text[] = {{CUL, 3, 0}, {TK, 0, 0}, {TINS, 2, 0}}; + static const H frame[] = {{0, 0, 3}}; + Spec bad = {nums, 1, inputs, 0, number_views, 0, frame, 1, wrong_text, 3, NULL, 0, two, 3, constants, 1, text_views, 0, NULL, 0, NULL, 0}; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "cursor of another text")); + static const O input_in_frame[] = {{CUL, 3, 0}, {TI, 0, 0}, {TINS, 1, 0}}; + bad.o = input_in_frame; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "text input outside")); + static const O store_text[] = {{TK, 0, 0}, {ST, 0, 0}}; + static const H frame2[] = {{0, 0, 2}}; + bad.o = store_text; bad.no = 2; bad.h = frame2; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "operand type")); + static const O load_text[] = {{L, 1, 0}, {ST, 0, 0}}; + bad.o = load_text; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "no such state")); + static const V text_as_number[] = {{"v", 0, 1}}; + static const O constant_only[] = {{TK, 0, 0}}; + bad = (Spec){nums, 1, inputs, 0, text_as_number, 1, NULL, 0, constant_only, 1, NULL, 0, two, 3, constants, 1, NULL, 0, NULL, 0, NULL, 0}; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "view must leave one value of its type")); + static const T cursor_on_number[] = {{"c", 2, 0}}; + bad = (Spec){nums, 1, inputs, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, cursor_on_number, 1, constants, 1, NULL, 0, NULL, 0, NULL, 0}; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "state reference")); + static const char *const broken[] = {"\xc0\xaf"}; + bad = (Spec){nums, 1, inputs, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, broken, 1, NULL, 0, NULL, 0, NULL, 0}; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "text constant")); +} + +static bool ignore_span(void *context, PureSpan span) { + (void)context; + CHECK(pure_utf8_valid(span) || span.size); + return true; +} + +/* Damaged text modules either fail to load or edit text safely: every cursor + * stays within its text and every text stays valid UTF-8. */ +static void text_mutations(void) { + static unsigned char valid[65536], bytes[65536]; + size_t size = build(valid, text_spec); + static const char *const words[] = {"a", "\xea\xb0\x80", "\n", "\xf0\x9f\x98\x80", "xy\nz", ""}; + uint32_t state = 0x1b873593u; + unsigned accepted = 0; + for (unsigned round = 0; round < 20000; ++round) { + memcpy(bytes, valid, size); + unsigned flips = 1 + next_random(&state) % 3; + for (unsigned f = 0; f < flips; ++f) + bytes[next_random(&state) % size] ^= (unsigned char)(1u << (next_random(&state) % 8)); + if (pure_module_load(bytes, size, &module_b, error, sizeof(error)) != PURE_OK) continue; + ++accepted; + PureApp app; + if (pure_app_start(&app, &module_b, (PureData){0}) != PURE_OK) continue; + for (unsigned e = 0; e < 16; ++e) { + uint32_t input = next_random(&state) % 8; + if (module_b.input[input].kind == PURE_KIND_TEXT) { + const char *word = words[next_random(&state) % LEN(words)]; + pure_app_text(&app, input, (PureSpan){(const unsigned char *)word, strlen(word)}); + } else if (module_b.input[input].kind == PURE_KIND_KEY) pure_app_input(&app, input, PURE_EDGE_DOWN); + else pure_app_frame(&app); + for (uint32_t v = 0; v < module_b.views; ++v) { + double value; + if (module_b.view_type[v] == PURE_VIEW_TEXT) pure_app_view_text(&app, v, ignore_span, NULL); + else pure_app_view(&app, v, &value); + } + for (uint32_t s = 0; s < module_b.states; ++s) { + if (module_b.state_type[s] == PURE_STATE_CURSOR) { + PureDraft *text = app.texts[module_b.state_ref[s]]; + size_t length = pure_draft_size(text), at = (size_t)app.values[s]; + CHECK(app.values[s] >= 0 && at <= length && app.values[s] == (double)at); + if (at < length) { /* never inside a multi-byte character */ + Text t = {{0}, 0}; + pure_draft_read(text, at, 1, text_span, &t); + CHECK(((unsigned char)t.text[0] & 0xC0) != 0x80); + } + } else if (module_b.state_type[s] == PURE_STATE_TEXT) { + unsigned utf8 = 0; + bool ok = true; + Text t = {{0}, 0}; + if (pure_draft_size(app.texts[s]) < 200) { + pure_draft_read(app.texts[s], 0, pure_draft_size(app.texts[s]), text_span, &t); + ok = pure_utf8_step(&utf8, (PureSpan){(const unsigned char *)t.text, t.size}) && + pure_utf8_complete(utf8); + } + CHECK(ok); + } else CHECK(isfinite(app.values[s])); + } + } + pure_app_stop(&app); + } + printf("{\"text_module_mutations\":20000,\"accepted_after_damage\":%u}\n", accepted); +} + +static Spec list_spec; + +enum { LC = PURE_OP_LIST_COUNT, LA = PURE_OP_LIST_APPEND, LI = PURE_OP_LIST_INSERT, LR = PURE_OP_LIST_REMOVE, + IG = PURE_OP_ITEM_GET, IS = PURE_OP_ITEM_SET, XL = PURE_OP_INDEX_LOAD, XS = PURE_OP_INDEX_STORE, + XM = PURE_OP_INDEX_MOVE, XF = PURE_OP_INDEX_FIRST, XE = PURE_OP_INDEX_LAST, XN = PURE_OP_INDEX_NUM, + NOT = PURE_OP_NOT, TITLE = 1, DONE = 1 | 1u << 16 }; + +static const char *item_title(const PureApp *app, uint32_t list, size_t at) { + static char title[64]; + PureCell cell = pure_list_get(app->lists[list], at, 0); + CHECK(cell.size < sizeof(title)); + if (cell.size) memcpy(title, cell.text, cell.size); + title[cell.size] = 0; + return title; +} + +/* A task list: made (num), tasks (list of task {title, done}), at (index of + * tasks). Indices follow their item across inserts and removes; a failed + * event undoes every list change. */ +static void lists(void) { + static const S nums[] = {{"made", 0}}; + static const T states[] = {{"tasks", 3, 0}, {"at", 4, 1}}; + static const RF task_fields[] = {{"title", 1, 0}, {"done", 0, 0}}; + static const R records[] = {{"task", task_fields, 2}}; + static const char *const constants[] = {"", "new", "x"}; + static const I inputs[] = { + {"typed", NULL, PURE_KIND_TEXT, false, NULL, 0}, KEY("ins", "KeyI"), KEY("del", "Delete"), + KEY("up", "ArrowUp"), KEY("down", "ArrowDown"), KEY("toggle", "Space"), KEY("rename", "KeyR"), KEY("bad", "KeyB"), + }; + static const O code[] = { + {TI, 0, 0}, {C, 0, 0}, {LA, 1, 0}, {XE, 1, 0}, {XS, 2, 0}, {L, 0, 0}, {C, 0, 1}, {ADD, 0, 0}, {ST, 0, 0}, /* 0 typed */ + {XL, 2, 0}, {TK, 1, 0}, {C, 0, 0}, {LI, 1, 0}, /* 9 ins */ + {XL, 2, 0}, {LR, 1, 0}, /* 13 del */ + {XL, 2, 0}, {C, 0, -1}, {XM, 0, 0}, {XS, 2, 0}, /* 15 up */ + {XL, 2, 0}, {C, 0, 1}, {XM, 0, 0}, {XS, 2, 0}, /* 19 down */ + {XL, 2, 0}, {XL, 2, 0}, {IG, DONE, 0}, {NOT, 0, 0}, {IS, DONE, 0}, /* 23 toggle */ + {XL, 2, 0}, {XL, 2, 0}, {IG, TITLE, 0}, {TK, 2, 0}, {CAT, 0, 0}, {IS, TITLE, 0}, /* 28 rename */ + {XL, 2, 0}, {TK, 2, 0}, {IS, TITLE, 0}, {XL, 2, 0}, {LR, 1, 0}, {TK, 1, 0}, {C, 0, 0}, /* 34 bad */ + {LA, 1, 0}, {C, 0, 1}, {C, 0, 0}, {DIV, 0, 0}, {ST, 0, 0}, + {LC, 1, 0}, /* 46 view count */ + {XL, 2, 0}, {XN, 0, 0}, /* 47 view position */ + {XL, 2, 0}, {IG, DONE, 0}, /* 49 view done */ + {XL, 2, 0}, {IG, TITLE, 0}, /* 51 view current */ + }; + static const H handlers[] = {{1, 0, 9}, {3, 9, 4}, {5, 13, 2}, {7, 15, 4}, {9, 19, 4}, {11, 23, 5}, + {13, 28, 6}, {15, 34, 12}}; + static const V number_views[] = {{"count", 46, 1}, {"position", 47, 2}, {"done", 49, 2}}; + static const V text_views[] = {{"current", 51, 2}}; + Spec spec = {nums, 1, inputs, LEN(inputs), number_views, 3, handlers, LEN(handlers), code, LEN(code), + NULL, 0, states, 2, constants, 3, text_views, 1, records, 1, NULL, 0}; + list_spec = spec; + if (load(spec, &module_a) != PURE_OK) { fprintf(stderr, "%s\n", error); abort(); } + PureApp app; + CHECK(pure_app_start(&app, &module_a, (PureData){0}) == PURE_OK); + double value; + CHECK(number_view(&app, 0) == 0 && number_view(&app, 1) == 0 && !pure_app_view(&app, 2, &value)); + CHECK(pure_app_view_text(&app, 3, text_span, &(Text){{0}, 0}) == PURE_NOT_FOUND); /* no item yet */ + CHECK(app.fault == PURE_FAULT_NONE); /* views leave faults alone */ + CHECK(pure_app_text(&app, 0, (PureSpan){(const unsigned char *)"a", 1}) == PURE_OK); + CHECK(pure_app_text(&app, 0, (PureSpan){(const unsigned char *)"b", 1}) == PURE_OK); + CHECK(pure_list_count(app.lists[1]) == 2 && app.values[2] == 1 && app.values[0] == 2); + CHECK(pure_app_input(&app, 3, PURE_EDGE_DOWN) == PURE_OK && app.values[2] == 0); + CHECK(pure_app_input(&app, 3, PURE_EDGE_DOWN) == PURE_OK && app.values[2] == 0); /* stops at the first */ + /* Inserting before the current item: the index follows it. */ + CHECK(pure_app_input(&app, 1, PURE_EDGE_DOWN) == PURE_OK && app.values[2] == 1); + CHECK(!strcmp(item_title(&app, 1, 0), "new") && !strcmp(view_text(&app, 3), "a")); + CHECK(pure_app_input(&app, 5, PURE_EDGE_DOWN) == PURE_OK && number_view(&app, 2) == 1); + CHECK(pure_app_input(&app, 6, PURE_EDGE_DOWN) == PURE_OK && !strcmp(view_text(&app, 3), "ax")); + CHECK(pure_app_input(&app, 4, PURE_EDGE_DOWN) == PURE_OK && app.values[2] == 2); + CHECK(pure_app_input(&app, 4, PURE_EDGE_DOWN) == PURE_OK && app.values[2] == 2); /* stops at the last */ + /* Removing the last item: the index moves to the new last. */ + CHECK(pure_app_input(&app, 2, PURE_EDGE_DOWN) == PURE_OK && app.values[2] == 1 && pure_list_count(app.lists[1]) == 2); + CHECK(pure_app_input(&app, 3, PURE_EDGE_DOWN) == PURE_OK && app.values[2] == 0); + /* Removing the current item: the index names the next. */ + CHECK(pure_app_input(&app, 2, PURE_EDGE_DOWN) == PURE_OK && app.values[2] == 0 && !strcmp(view_text(&app, 3), "ax")); + /* A failing event undoes a set, a remove and an append. */ + CHECK(pure_app_input(&app, 7, PURE_EDGE_DOWN) == PURE_INVALID && app.fault == PURE_FAULT_DIVIDE); + CHECK(pure_list_count(app.lists[1]) == 1 && !strcmp(item_title(&app, 1, 0), "ax") && + pure_list_get(app.lists[1], 0, 1).num == 1 && app.values[2] == 0 && app.values[0] == 2); + CHECK(pure_app_input(&app, 2, PURE_EDGE_DOWN) == PURE_OK && pure_list_count(app.lists[1]) == 0 && app.values[2] == 0); + CHECK(pure_app_input(&app, 2, PURE_EDGE_DOWN) == PURE_NOT_FOUND && app.fault == PURE_FAULT_NOT_FOUND); + CHECK(pure_app_input(&app, 5, PURE_EDGE_DOWN) == PURE_NOT_FOUND); + CHECK(pure_app_input(&app, 1, PURE_EDGE_DOWN) == PURE_OK && pure_list_count(app.lists[1]) == 1 && app.values[2] == 0); + for (int i = 0; i < 3; ++i) CHECK(pure_app_text(&app, 0, (PureSpan){(const unsigned char *)"\xea\xb0\x80", 3}) == PURE_OK); + CHECK(pure_app_input(&app, 3, PURE_EDGE_DOWN) == PURE_OK && app.values[2] == 2); + CHECK(pure_app_input(&app, 5, PURE_EDGE_DOWN) == PURE_OK); + + /* Replacement keeps the list by name. The same record keeps the list + * itself; a changed record keeps each field by name and kind and gives new + * fields their default. */ + static const S no_nums[] = {{"made", 0}}; + Spec same = {no_nums, 1, inputs, 0, number_views, 0, handlers, 0, code, 0, NULL, 0, states, 2, constants, 3, + text_views, 0, records, 1, NULL, 0}; + CHECK(load(same, &module_b) == PURE_OK); + const PureList *before = app.lists[1]; + CHECK(pure_app_replace(&app, &module_b) == PURE_OK && app.lists[1] == before && app.values[2] == 2); + static const RF changed_fields[] = {{"done", 0, 0}, {"note", 1, 1}, {"title", 0, 7}, {"rank", 0, 5}}; + static const R changed[] = {{"task", changed_fields, 4}}; + Spec next = same; + next.r = changed; + CHECK(load(next, &module_a) == PURE_OK); + CHECK(pure_app_replace(&app, &module_a) == PURE_OK && pure_list_count(app.lists[1]) == 4 && app.values[2] == 2); + PureCell cell = pure_list_get(app.lists[1], 2, 0); + CHECK(cell.num == 1); /* done kept by name */ + cell = pure_list_get(app.lists[1], 2, 1); + CHECK(cell.size == 3 && !memcmp(cell.text, "new", 3)); /* note: its default */ + CHECK(pure_list_get(app.lists[1], 2, 2).num == 7); /* title is now a number: default */ + CHECK(pure_list_get(app.lists[1], 0, 3).num == 5); + /* A state whose kind changed starts again. */ + static const T swapped_kinds[] = {{"tasks", 1, 0}, {"at", 3, 0}}; + next.t = swapped_kinds; + CHECK(load(next, &module_b) == PURE_OK); + CHECK(pure_app_replace(&app, &module_b) == PURE_OK && !app.lists[1] && pure_draft_size(app.texts[1]) == 0 && + pure_list_count(app.lists[2]) == 0); + pure_app_stop(&app); + + /* Verification of list operations. */ + static const T two_lists[] = {{"a", 3, 0}, {"b", 3, 0}, {"ia", 4, 1}}; + static const O other_index[] = {{XL, 3, 0}, {LR, 2, 0}}; + static const H frame[] = {{0, 0, 2}}; + Spec bad = {nums, 1, inputs, 0, number_views, 0, frame, 1, other_index, 2, NULL, 0, two_lists, 3, constants, 3, + text_views, 0, records, 1, NULL, 0}; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "index of another list")); + static const O swapped[] = {{C, 0, 0}, {TK, 0, 0}, {LA, 1, 0}}; + static const H frame3[] = {{0, 0, 3}}; + bad.o = swapped; bad.no = 3; bad.h = frame3; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "operand type")); + static const O short_record[] = {{TK, 0, 0}, {LA, 1, 0}}; + bad.o = short_record; bad.no = 2; bad.h = frame; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "stack underflow")); + static const O no_field[] = {{XL, 3, 0}, {IG, 1 | 2u << 16, 0}, {ST, 0, 0}}; + bad.o = no_field; bad.no = 3; bad.h = frame3; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "no such state")); + static const O index_as_number[] = {{XL, 3, 0}, {ST, 0, 0}}; + bad.o = index_as_number; bad.no = 2; bad.h = frame; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "operand type")); + static const V append_view[] = {{"v", 0, 3}}; + bad = (Spec){nums, 1, inputs, 0, append_view, 1, NULL, 0, (O[]){{TK, 0, 0}, {C, 0, 0}, {LA, 1, 0}}, 3, NULL, 0, + two_lists, 3, constants, 3, NULL, 0, records, 1, NULL, 0}; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "view with an effect")); + static const T index_of_number[] = {{"ia", 4, 0}}; + bad = (Spec){nums, 1, inputs, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, index_of_number, 1, constants, 3, NULL, 0, + records, 1, NULL, 0}; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "state reference")); + static const T list_of_nothing[] = {{"a", 3, 1}}; + bad.t = list_of_nothing; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "state reference")); + bad.t = NULL; bad.nt = 0; + static const RF repeated[] = {{"x", 0, 0}, {"x", 1, 0}}; + bad.r = (R[]){{"task", repeated, 2}}; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "duplicate record field")); + static const RF far_default[] = {{"x", 1, 3}}; + bad.r = (R[]){{"task", far_default, 1}}; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "record field default")); + static const RF infinite[] = {{"x", 0, INFINITY}}; + bad.r = (R[]){{"task", infinite, 1}}; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "record field default")); + bad.r = (R[]){{"task", NULL, 0}}; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "record")); + bad.r = (R[]){{"made", task_fields, 2}}; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "duplicate name")); +} + +/* Damaged list modules either fail to load or keep every index on an item + * of its list and every text field valid UTF-8. */ +static void list_mutations(void) { + static unsigned char valid[65536], bytes[65536]; + size_t size = build(valid, list_spec); + static const char *const words[] = {"a", "\xea\xb0\x80", "\n", ""}; + uint32_t state = 0x85ebca6bu; + unsigned accepted = 0; + for (unsigned round = 0; round < 20000; ++round) { + memcpy(bytes, valid, size); + unsigned flips = 1 + next_random(&state) % 3; + for (unsigned f = 0; f < flips; ++f) + bytes[next_random(&state) % size] ^= (unsigned char)(1u << (next_random(&state) % 8)); + if (pure_module_load(bytes, size, &module_b, error, sizeof(error)) != PURE_OK) continue; + ++accepted; + PureApp app; + if (pure_app_start(&app, &module_b, (PureData){0}) != PURE_OK) continue; + for (unsigned e = 0; e < 24; ++e) { + uint32_t input = next_random(&state) % 8; + if (module_b.input[input].kind == PURE_KIND_TEXT) { + const char *word = words[next_random(&state) % LEN(words)]; + pure_app_text(&app, input, (PureSpan){(const unsigned char *)word, strlen(word)}); + } else if (module_b.input[input].kind == PURE_KIND_KEY) pure_app_input(&app, input, PURE_EDGE_DOWN); + else pure_app_frame(&app); + for (uint32_t v = 0; v < module_b.views; ++v) { + double value; + if (module_b.view_type[v] == PURE_VIEW_TEXT) pure_app_view_text(&app, v, ignore_span, NULL); + else pure_app_view(&app, v, &value); + } + for (uint32_t s = 0; s < module_b.states; ++s) { + if (module_b.state_type[s] == PURE_STATE_INDEX) { + size_t count = pure_list_count(app.lists[module_b.state_ref[s]]); + CHECK(app.values[s] == floor(app.values[s]) && app.values[s] >= 0 && + app.values[s] <= (count ? (double)(count - 1) : 0)); + } else if (module_b.state_type[s] == PURE_STATE_LIST) { + const PureRecord *record = &module_b.record[module_b.state_ref[s]]; + for (size_t at = 0; at < pure_list_count(app.lists[s]); ++at) + for (unsigned f = 0; f < record->count; ++f) { + PureCell cell = pure_list_get(app.lists[s], at, f); + if (module_b.record_field_text[record->first + f]) + CHECK(pure_utf8_valid((PureSpan){cell.text, cell.size})); + else CHECK(isfinite(cell.num)); + } + } else if (module_b.state_type[s] == PURE_STATE_NUM) CHECK(isfinite(app.values[s])); + } + } + pure_app_stop(&app); + } + printf("{\"list_module_mutations\":20000,\"accepted_after_damage\":%u}\n", accepted); +} + +static Spec table_spec; + +static const char *cell_text(PureApp *app, uint32_t column, size_t row) { + static Text t; + t.size = 0; + t.text[0] = 0; + CHECK(pure_app_cell_text(app, column, row, text_span, &t) == PURE_OK); + return t.text; +} + +enum { ROW = PURE_OP_ROW, EQ = PURE_OP_EQ, LT = PURE_OP_LT, PICK = PURE_OP_PICK, SLIDE = PURE_OP_SLIDE }; + +/* A table view has a row per item; its columns read the row and may branch. + * A value crosses a join when every path brings the same stack. */ +static void tables(void) { + static const S nums[] = {{"n", 0}}; + static const T states[] = {{"tasks", 3, 0}, {"at", 4, 1}}; + static const RF task_fields[] = {{"title", 1, 0}, {"done", 0, 0}}; + static const R records[] = {{"task", task_fields, 2}}; + static const char *const constants[] = {"", "x", " ", "empty"}; + static const I inputs[] = {{"typed", NULL, PURE_KIND_TEXT, false, NULL, 0}, KEY("toggle", "Space")}; + static const O code[] = { + {TI, 0, 0}, {C, 0, 0}, {LA, 1, 0}, {XE, 1, 0}, {XS, 2, 0}, /* 0 typed */ + {XL, 2, 0}, {XL, 2, 0}, {IG, DONE, 0}, {NOT, 0, 0}, {IS, DONE, 0}, /* 5 toggle */ + {LC, 1, 0}, {C, 0, 0}, {GT, 0, 0}, {JZ, 17, 0}, {XL, 2, 0}, {IG, TITLE, 0}, {JMP, 18, 0}, + {TK, 3, 0}, /* 10 current */ + {ROW, 1, 0}, {IG, TITLE, 0}, /* 18 title */ + {ROW, 1, 0}, {IG, DONE, 0}, {JZ, 25, 0}, {TK, 1, 0}, {JMP, 26, 0}, {TK, 2, 0}, /* 20 mark */ + {ROW, 1, 0}, {XN, 0, 0}, /* 26 pos */ + {ROW, 1, 0}, {XN, 0, 0}, {XL, 2, 0}, {XN, 0, 0}, {EQ, 0, 0}, /* 28 here */ + }; + static const H handlers[] = {{1, 0, 5}, {3, 5, 5}}; + static const V text_views[] = {{"current", 10, 8}}; + static const W table[] = {{"board", 2, 0, 1, 0}, {"title", 1, 2, 18, 2}, {"mark", 1, 2, 20, 6}, + {"pos", 0, 2, 26, 2}, {"here", 0, 2, 28, 5}}; + Spec spec = {nums, 1, inputs, 2, NULL, 0, handlers, 2, code, LEN(code), NULL, 0, states, 2, constants, 4, + text_views, 1, records, 1, table, 5}; + table_spec = spec; + if (load(spec, &module_a) != PURE_OK) { fprintf(stderr, "%s\n", error); abort(); } + CHECK(pure_module_view(&module_a, "board") == 1 && pure_module_view(&module_a, "title") == -1 && + pure_module_column(&module_a, 1, "title") == 2 && pure_module_column(&module_a, 1, "current") == -1); + PureApp app; + CHECK(pure_app_start(&app, &module_a, (PureData){0}) == PURE_OK); + double value; + CHECK(pure_app_rows(&app, 1) == 0 && !strcmp(view_text(&app, 0), "empty")); /* the else branch */ + CHECK(pure_app_cell_text(&app, 2, 0, text_span, &(Text){{0}, 0}) == PURE_NOT_FOUND); + CHECK(pure_app_text(&app, 0, (PureSpan){(const unsigned char *)"a", 1}) == PURE_OK); + CHECK(pure_app_text(&app, 0, (PureSpan){(const unsigned char *)"\xeb\xb9\xb5", 3}) == PURE_OK); + CHECK(pure_app_input(&app, 1, PURE_EDGE_DOWN) == PURE_OK); + CHECK(pure_app_rows(&app, 1) == 2 && !strcmp(view_text(&app, 0), "\xeb\xb9\xb5")); + CHECK(!strcmp(cell_text(&app, 2, 0), "a") && !strcmp(cell_text(&app, 2, 1), "\xeb\xb9\xb5")); + CHECK(!strcmp(cell_text(&app, 3, 0), " ") && !strcmp(cell_text(&app, 3, 1), "x")); + CHECK(pure_app_cell(&app, 4, 1, &value) && value == 1 && pure_app_cell(&app, 5, 0, &value) && value == 0 && + pure_app_cell(&app, 5, 1, &value) && value == 1); + CHECK(!pure_app_cell(&app, 4, 2, &value) && pure_app_cell_text(&app, 2, 2, text_span, &(Text){{0}, 0}) == PURE_NOT_FOUND); + /* Columns are read by row, other views without one. */ + CHECK(!pure_app_view(&app, 4, &value) && pure_app_view_text(&app, 2, text_span, &(Text){{0}, 0}) == PURE_INVALID); + CHECK(pure_app_cell_text(&app, 0, 0, text_span, &(Text){{0}, 0}) == PURE_INVALID && pure_app_rows(&app, 0) == 0); + CHECK(pure_app_view_text(&app, 1, text_span, &(Text){{0}, 0}) == PURE_INVALID); + pure_app_stop(&app); + + /* Verification of rows, tables and joins. */ + Spec bad = spec; + static const V row_view[] = {{"current", 18, 2}}; + bad.tv = row_view; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "row outside a column")); + static const H row_handler[] = {{3, 26, 2}}; + bad = spec; bad.h = row_handler; bad.nh = 1; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "row outside a column")); + static const W twice[] = {{"board", 2, 0, 1, 0}, {"title", 1, 2, 18, 2}, {"title", 1, 2, 18, 2}}; + bad = spec; bad.w = twice; bad.nw = 3; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "duplicate column")); + static const W two_tables[] = {{"board", 2, 0, 1, 0}, {"title", 1, 2, 18, 2}, {"other", 2, 0, 1, 0}, + {"title", 1, 4, 18, 2}, {"tasks", 0, 4, 26, 2}}; + bad = spec; bad.w = two_tables; bad.nw = 5; + CHECK(load(bad, &module_b) == PURE_OK); /* column names belong to their table */ + static const W not_a_table[] = {{"title", 1, 1, 18, 2}}; + bad = spec; bad.w = not_a_table; bad.nw = 1; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "view type")); + static const W over_number[] = {{"board", 2, 0, 0, 0}}; + bad = spec; bad.w = over_number; bad.nw = 1; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "table list")); + static const O other_row[] = {{ROW, 2, 0}, {XN, 0, 0}}; + static const W other_row_column[] = {{"board", 2, 0, 1, 0}, {"pos", 0, 1, 0, 2}}; + bad = spec; bad.o = other_row; bad.no = 2; bad.h = NULL; bad.nh = 0; bad.tv = NULL; bad.ntv = 0; + bad.w = other_row_column; bad.nw = 2; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "no such state")); + static const O typed_join[] = {{L, 0, 0}, {JZ, 4, 0}, {TK, 0, 0}, {JMP, 5, 0}, {C, 0, 1}}; + static const V mixed[] = {{"current", 0, 5}}; + bad = spec; bad.o = typed_join; bad.no = 5; bad.h = NULL; bad.nh = 0; bad.tv = mixed; bad.w = NULL; bad.nw = 0; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "join with different stacks")); + /* At most 8 joins with a value may be ahead at once. */ + for (unsigned open = 8; open <= 9; ++open) { + static O nested[1 + 2 * 9 + 9 + 1]; + unsigned n = 0; + nested[n++] = (O){C, 0, 1}; + for (unsigned k = 0; k < open; ++k) { nested[n++] = (O){C, 0, 0}; nested[n++] = (O){JZ, 1 + 2 * open + k, 0}; } + for (unsigned k = 0; k < open; ++k) nested[n++] = (O){NEG, 0, 0}; + nested[n++] = (O){ST, 0, 0}; + H frame = {0, 0, n}; + bad = spec; bad.o = nested; bad.no = n; bad.h = &frame; bad.nh = 1; bad.tv = NULL; bad.ntv = 0; bad.w = NULL; bad.nw = 0; + CHECK(load(bad, &module_b) == (open == 8 ? PURE_OK : PURE_INVALID)); + } + CHECK(strstr(error, "more than 8 joins ahead")); + + /* PICK copies a value from below, SLIDE drops values under the top: a + * value used twice is computed once. (3 + 4) * (3 + 4) with a text between. */ + static const O picked[] = {{C, 0, 3}, {C, 0, 4}, {ADD, 0, 0}, {TK, 1, 0}, {PICK, 1, 0}, {PICK, 2, 0}, {MUL, 0, 0}, + {SLIDE, 2, 0}}; + static const V squared[] = {{"sq", 0, 8}}; + bad = (Spec){nums, 1, inputs, 0, squared, 1, NULL, 0, picked, 8, NULL, 0, NULL, 0, constants, 2, NULL, 0, NULL, 0, NULL, 0}; + CHECK(load(bad, &module_b) == PURE_OK); + CHECK(pure_app_start(&app, &module_b, (PureData){0}) == PURE_OK && number_view(&app, 0) == 49); + pure_app_stop(&app); + static const O pick_text[] = {{TK, 1, 0}, {C, 0, 1}, {PICK, 1, 0}, {SLIDE, 2, 0}}; + static const V text_left[] = {{"t", 0, 4}}; + bad.v = NULL; bad.nv = 0; bad.tv = text_left; bad.ntv = 1; bad.o = pick_text; bad.no = 4; + CHECK(load(bad, &module_b) == PURE_OK); + CHECK(pure_app_start(&app, &module_b, (PureData){0}) == PURE_OK && !strcmp(view_text(&app, 0), "x")); + pure_app_stop(&app); + static const O pick_type[] = {{TK, 1, 0}, {PICK, 0, 0}, {C, 0, 1}, {ADD, 0, 0}, {SLIDE, 1, 0}}; + static const V five[] = {{"sq", 0, 5}}, three[] = {{"sq", 0, 3}}; + bad.o = pick_type; bad.no = 5; bad.tv = NULL; bad.ntv = 0; bad.v = five; bad.nv = 1; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "operand type")); /* a copy keeps its type */ + static const O pick_far[] = {{C, 0, 1}, {PICK, 1, 0}, {SLIDE, 1, 0}}; + bad.o = pick_far; bad.no = 3; bad.v = three; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "stack underflow")); + static const O slide_all[] = {{C, 0, 1}, {C, 0, 2}, {SLIDE, 2, 0}}; + bad.o = slide_all; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "stack underflow")); + static const O slide_none[] = {{C, 0, 1}, {C, 0, 2}, {SLIDE, 0, 0}}; + bad.o = slide_none; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "stack underflow")); +} + +/* Damaged table modules either fail to load or evaluate every cell safely. */ +static void table_mutations(void) { + static unsigned char valid[65536], bytes[65536]; + size_t size = build(valid, table_spec); + uint32_t state = 0xc2b2ae35u; + unsigned accepted = 0; + for (unsigned round = 0; round < 20000; ++round) { + memcpy(bytes, valid, size); + unsigned flips = 1 + next_random(&state) % 3; + for (unsigned f = 0; f < flips; ++f) + bytes[next_random(&state) % size] ^= (unsigned char)(1u << (next_random(&state) % 8)); + if (pure_module_load(bytes, size, &module_b, error, sizeof(error)) != PURE_OK) continue; + ++accepted; + PureApp app; + if (pure_app_start(&app, &module_b, (PureData){0}) != PURE_OK) continue; + for (unsigned e = 0; e < 12; ++e) { + uint32_t input = next_random(&state) % 2; + if (module_b.input[input].kind == PURE_KIND_TEXT) pure_app_text(&app, input, (PureSpan){(const unsigned char *)"t", 1}); + else if (module_b.input[input].kind == PURE_KIND_KEY) pure_app_input(&app, input, PURE_EDGE_DOWN); + for (uint32_t v = 0; v < module_b.views; ++v) { + double value; + if (!module_b.view_table[v]) { + if (module_b.view_type[v] == PURE_VIEW_TEXT) pure_app_view_text(&app, v, ignore_span, NULL); + else pure_app_view(&app, v, &value); + continue; + } + size_t rows = pure_app_rows(&app, module_b.view_table[v] - 1u); + for (size_t row = 0; row <= rows; ++row) { + if (module_b.view_type[v] == PURE_VIEW_TEXT) pure_app_cell_text(&app, v, row, ignore_span, NULL); + else if (pure_app_cell(&app, v, row, &value)) CHECK(isfinite(value)); + } + } + } + pure_app_stop(&app); + } + printf("{\"table_module_mutations\":20000,\"accepted_after_damage\":%u}\n", accepted); +} + +/* ---- Stored states ---------------------------------------------------- */ + +static char *new_store(void) { + static char path[64]; + snprintf(path, sizeof(path), "/tmp/pure-module-store-XXXXXX"); + CHECK(mkdtemp(path) && pure_store_init(path) == PURE_OK); + return path; +} + +static void remove_store(const char *path) { + DIR *entries = opendir(path); + CHECK(entries); + struct dirent *entry; + while ((entry = readdir(entries))) + if (strcmp(entry->d_name, ".") && strcmp(entry->d_name, "..")) CHECK(unlinkat(dirfd(entries), entry->d_name, 0) == 0); + CHECK(closedir(entries) == 0 && rmdir(path) == 0); +} + +typedef struct { unsigned char bytes[4096]; size_t size; } Bytes; + +static bool bytes_span(void *context, PureSpan span) { + Bytes *b = context; + CHECK(b->size + span.size <= sizeof(b->bytes)); + memcpy(b->bytes + b->size, span.data, span.size); + b->size += span.size; + return true; +} + +/* Two apps of one module hold equal states: numbers bit for bit, texts and + * list items byte for byte. */ +static void same_states(const PureApp *a, const PureApp *b) { + const PureModule *m = a->module; + for (uint32_t i = 0; i < m->states; ++i) { + if (m->state_type[i] == PURE_STATE_TEXT) { + static Bytes x, y; + x.size = y.size = 0; + CHECK(pure_draft_read(a->texts[i], 0, pure_draft_size(a->texts[i]), bytes_span, &x) == PURE_OK); + CHECK(pure_draft_read(b->texts[i], 0, pure_draft_size(b->texts[i]), bytes_span, &y) == PURE_OK); + CHECK(x.size == y.size && !memcmp(x.bytes, y.bytes, x.size)); + } else if (m->state_type[i] == PURE_STATE_LIST) { + const PureRecord *r = &m->record[m->state_ref[i]]; + CHECK(pure_list_count(a->lists[i]) == pure_list_count(b->lists[i])); + for (size_t at = 0; at < pure_list_count(a->lists[i]); ++at) + for (unsigned f = 0; f < r->count; ++f) { + PureCell x = pure_list_get(a->lists[i], at, f), y = pure_list_get(b->lists[i], at, f); + CHECK(!memcmp(&x.num, &y.num, sizeof(x.num)) && x.size == y.size && (!x.size || !memcmp(x.text, y.text, x.size))); + } + } else CHECK(!memcmp(&a->values[i], &b->values[i], sizeof(double))); + } +} + +/* The same random events on an app in memory and on one whose states are + * stored and which restarts from them every few events: equal after every + * step, failed events included. */ +static void stored_equivalence(Spec spec, const char *const *words, size_t word_count, uint32_t seed) { + char *path = new_store(); + CHECK(load(spec, &module_a) == PURE_OK); + PureApp memory, stored; + CHECK(pure_app_start(&memory, &module_a, (PureData){0}) == PURE_OK); + CHECK(pure_app_start(&stored, &module_a, pure_tree_data(path)) == PURE_OK); + unsigned restarts = 0; + for (unsigned step = 0; step < 400; ++step) { + uint32_t input = next_random(&seed) % module_a.inputs; + PureResult a, b; + if (module_a.input[input].kind == PURE_KIND_TEXT) { + const char *word = words[next_random(&seed) % word_count]; + PureSpan text = {(const unsigned char *)word, strlen(word)}; + a = pure_app_text(&memory, input, text); + b = pure_app_text(&stored, input, text); + } else { + a = pure_app_input(&memory, input, PURE_EDGE_DOWN); + b = pure_app_input(&stored, input, PURE_EDGE_DOWN); + } + CHECK(a == b); + same_states(&memory, &stored); + if (next_random(&seed) % 7 == 0) { + pure_app_stop(&stored); + CHECK(pure_app_start(&stored, &module_a, pure_tree_data(path)) == PURE_OK); + same_states(&memory, &stored); + ++restarts; + } + } + CHECK(restarts > 20); + pure_app_stop(&memory); + pure_app_stop(&stored); + remove_store(path); +} + +/* One event changes a number, a text and a list; the process dies at each + * commit stage. Starting again finds all three as before or all as after. */ +enum { NOTE = 1, TASKS = 3 }; +static const S crash_nums[] = {{"n", 0}}; +static const T crash_states[] = {{"note", 1, 0}, {"at", 2, 1}, {"tasks", 3, 0}, {"i", 4, 3}}; +static const RF crash_fields[] = {{"title", 1, 0}, {"done", 0, 0}}; +static const R crash_records[] = {{"task", crash_fields, 2}}; +static const char *const crash_constants[] = {"", "x"}; +static const I crash_inputs[] = {KEY("go", "KeyG")}; +static const O crash_code[] = { + {L, 0, 0}, {C, 0, 1}, {ADD, 0, 0}, {ST, 0, 0}, /* n = n + 1 */ + {CUL, 2, 0}, {TK, 1, 0}, {TINS, 1, 0}, /* note.insert(at, "x") */ + {TK, 1, 0}, {L, 0, 0}, {LA, 3, 0}, /* tasks.append(task { "x", n }) */ + {XE, 3, 0}, {XS, 4, 0}, /* i = tasks.last */ +}; +static const H crash_handlers[] = {{1, 0, 12}}; + +static unsigned consistent(const PureApp *app) { + unsigned n = (unsigned)app->values[0]; + CHECK(app->values[0] == n && pure_draft_size(app->texts[NOTE]) == n && app->values[2] == n); + CHECK(pure_list_count(app->lists[TASKS]) == n && app->values[4] == (n ? n - 1 : 0)); + for (unsigned k = 0; k < n; ++k) CHECK(pure_list_get(app->lists[TASKS], k, 1).num == k + 1); + return n; +} + +static void stored_crashes(void) { + char *path = new_store(); + Spec spec = {crash_nums, 1, crash_inputs, 1, NULL, 0, crash_handlers, 1, crash_code, LEN(crash_code), NULL, 0, + crash_states, 4, crash_constants, 2, NULL, 0, crash_records, 1, NULL, 0}; + CHECK(load(spec, &module_a) == PURE_OK); + PureApp app; + CHECK(pure_app_start(&app, &module_a, pure_tree_data(path)) == PURE_OK); + CHECK(pure_app_input(&app, 0, PURE_EDGE_DOWN) == PURE_OK && consistent(&app) == 1); + pure_app_stop(&app); + unsigned expected = 1; + for (int stage = PURE_AFTER_HEADER; stage <= PURE_BEFORE_DIR_SYNC; ++stage) { + pid_t child = fork(); + CHECK(child >= 0); + if (!child) { + PureApp doomed; + if (pure_app_start(&doomed, &module_a, pure_tree_data(path)) != PURE_OK) _exit(1); + crash = 1; + fail_stage = stage; + pure_app_input(&doomed, 0, PURE_EDGE_DOWN); + _exit(0); + } + int status; + CHECK(waitpid(child, &status, 0) == child && WIFEXITED(status) && WEXITSTATUS(status) == 77); + if (stage == PURE_BEFORE_DIR_SYNC) ++expected; /* the head was written */ + CHECK(pure_app_start(&app, &module_a, pure_tree_data(path)) == PURE_OK && consistent(&app) == expected); + pure_app_stop(&app); + } + /* A failed commit leaves the app and the store as they were; after an + * uncertain one the app no longer matches the store and its events fail + * until it starts again, from what the store has. */ + CHECK(pure_app_start(&app, &module_a, pure_tree_data(path)) == PURE_OK); + for (fail_stage = PURE_AFTER_HEADER; fail_stage <= PURE_BEFORE_RENAME; ++fail_stage) { + CHECK(pure_app_input(&app, 0, PURE_EDGE_DOWN) == PURE_STORE_ERROR && consistent(&app) == expected); + } + fail_stage = PURE_BEFORE_DIR_SYNC; + CHECK(pure_app_input(&app, 0, PURE_EDGE_DOWN) == PURE_UNCERTAIN && consistent(&app) == expected); + fail_stage = -1; + CHECK(pure_app_input(&app, 0, PURE_EDGE_DOWN) == PURE_CONFLICT && consistent(&app) == expected); + pure_app_stop(&app); + CHECK(pure_app_start(&app, &module_a, pure_tree_data(path)) == PURE_OK && consistent(&app) == expected + 1); + CHECK(pure_app_input(&app, 0, PURE_EDGE_DOWN) == PURE_OK && consistent(&app) == expected + 2); + pure_app_stop(&app); + remove_store(path); +} + +/* Frame changes are stored by the next event or by a save; a stop alone + * leaves them out. */ +static void stored_frames(void) { + char *path = new_store(); + static const O code[] = {{L, 0, 0}, {C, 0, 1}, {ADD, 0, 0}, {ST, 0, 0}}; + static const H handlers[] = {{0, 0, 4}, {1, 0, 0}}; + Spec spec = {crash_nums, 1, crash_inputs, 1, NULL, 0, handlers, 2, code, 4, NULL, 0, NULL, 0, NULL, 0, NULL, 0, + NULL, 0, NULL, 0}; + CHECK(load(spec, &module_a) == PURE_OK); + PureApp app; + CHECK(pure_app_start(&app, &module_a, pure_tree_data(path)) == PURE_OK); + for (int i = 0; i < 5; ++i) CHECK(pure_app_frame(&app) == PURE_OK); + pure_app_stop(&app); + CHECK(pure_app_start(&app, &module_a, pure_tree_data(path)) == PURE_OK && app.values[0] == 0); + for (int i = 0; i < 3; ++i) CHECK(pure_app_frame(&app) == PURE_OK); + CHECK(pure_app_save(&app) == PURE_OK); + pure_app_stop(&app); + CHECK(pure_app_start(&app, &module_a, pure_tree_data(path)) == PURE_OK && app.values[0] == 3); + for (int i = 0; i < 2; ++i) CHECK(pure_app_frame(&app) == PURE_OK); + CHECK(pure_app_input(&app, 0, PURE_EDGE_DOWN) == PURE_OK); + pure_app_stop(&app); + CHECK(pure_app_start(&app, &module_a, pure_tree_data(path)) == PURE_OK && app.values[0] == 5); + pure_app_stop(&app); + remove_store(path); +} + +static bool list_keys(void *context, const char *key) { + strcat(context, key); + strcat(context, ","); + return true; +} + +/* A message's document and the states its handlers change commit together. */ +static void stored_messages(void) { + char *path = new_store(); + CHECK(load(editor_spec, &module_a) == PURE_OK); + PureApp app; + unsigned char buffer[64]; + CHECK(pure_app_start(&app, &module_a, pure_tree_data(path)) == PURE_OK); + CHECK(pure_app_message(&app, 1, "doc", 0, edit_payload(buffer, 0, 0, "hello")) == PURE_OK && app.revision == 1); + CHECK(app.values[0] == 1); + CHECK(pure_app_message(&app, 1, "doc", 0, edit_payload(buffer, 0, 0, "x")) == PURE_CONFLICT && app.values[0] == 1); + /* An edit past the size guard fails: neither the document nor the count moves. */ + CHECK(pure_app_message(&app, 3, "doc", 1, edit_payload(buffer, 5, 0, "-world")) == PURE_LIMIT && app.values[0] == 1); + CHECK(pure_app_message(&app, 3, "doc", 1, edit_payload(buffer, 5, 0, "!")) == PURE_OK && app.values[0] == 2); + pure_app_stop(&app); + CHECK(pure_app_start(&app, &module_a, pure_tree_data(path)) == PURE_OK && app.values[0] == 2); + CHECK(pure_app_message(&app, 0, "doc", -1, (PureSpan){0}) == PURE_OK && app.revision == 2 && replied(&app, "hello!")); + pure_app_stop(&app); + /* Documents stay documents: the app's states are not among the keys. */ + char seen[256] = ""; + CHECK(pure_store_keys(path, list_keys, seen) == PURE_OK && !strcmp(seen, "doc,")); + remove_store(path); +} + +/* A stored list whose record changed keeps each field by name, when the app + * starts from it and when its module is replaced; stored values that no + * longer fit fall back, and damaged stored values stop the start. */ +static void stored_migration(void) { + char *path = new_store(); + static const RF changed_fields[] = {{"done", 0, 0}, {"note", 1, 1}, {"title", 1, 0}, {"rank", 0, 5}}; + static const R changed[] = {{"task", changed_fields, 4}}; + Spec before = {crash_nums, 1, crash_inputs, 1, NULL, 0, crash_handlers, 1, crash_code, LEN(crash_code), NULL, 0, + crash_states, 4, crash_constants, 2, NULL, 0, crash_records, 1, NULL, 0}; + Spec after = before; + after.r = changed; + after.h = NULL; + after.nh = 0; + CHECK(load(before, &module_a) == PURE_OK && load(after, &module_b) == PURE_OK); + PureApp app; + CHECK(pure_app_start(&app, &module_a, pure_tree_data(path)) == PURE_OK); + CHECK(pure_app_input(&app, 0, PURE_EDGE_DOWN) == PURE_OK && pure_app_input(&app, 0, PURE_EDGE_DOWN) == PURE_OK); + pure_app_stop(&app); + for (int round = 0; round < 2; ++round) { /* migrated, then stored as migrated */ + CHECK(pure_app_start(&app, &module_b, pure_tree_data(path)) == PURE_OK && pure_list_count(app.lists[TASKS]) == 2); + PureCell note = pure_list_get(app.lists[TASKS], 1, 1), title = pure_list_get(app.lists[TASKS], 1, 2); + CHECK(pure_list_get(app.lists[TASKS], 1, 0).num == 2 && pure_list_get(app.lists[TASKS], 1, 3).num == 5); + CHECK(note.size == 1 && note.text[0] == 'x' && title.size == 1 && title.text[0] == 'x'); + CHECK(app.values[0] == 2 && app.values[4] == 1 && pure_draft_size(app.texts[NOTE]) == 2); + pure_app_stop(&app); + } + /* Back to the first record by replacing the module; the next save stores it. */ + CHECK(pure_app_start(&app, &module_b, pure_tree_data(path)) == PURE_OK); + CHECK(pure_app_replace(&app, &module_a) == PURE_OK && pure_app_input(&app, 0, PURE_EDGE_DOWN) == PURE_OK); + pure_app_stop(&app); + CHECK(pure_app_start(&app, &module_a, pure_tree_data(path)) == PURE_OK && consistent(&app) == 3); + pure_app_stop(&app); + /* Stored numbers that no longer fit their state start again. */ + PureDraft *values; + int64_t revision; + CHECK(pure_state_open(path, "values", &values) == PURE_OK); + unsigned char record[64] = "PVS1"; + size_t at = 4; + const char *names[] = {"at", "i", "n"}; + double stored[] = {100, 7.5, 9}; + uint8_t types[] = {PURE_STATE_CURSOR, PURE_STATE_INDEX, PURE_STATE_NUM}; + for (unsigned k = 0; k < 3; ++k) { + record[at++] = types[k]; + record[at++] = (unsigned char)strlen(names[k]); + memcpy(record + at, names[k], strlen(names[k])); + at += strlen(names[k]); + uint64_t bits; + memcpy(&bits, &stored[k], sizeof(bits)); + for (unsigned b = 0; b < 8; ++b) record[at++] = (unsigned char)(bits >> (8 * b)); + } + CHECK(pure_draft_splice(values, 0, pure_draft_size(values), (PureSpan){record, at}) == PURE_OK); + CHECK(pure_draft_commit(values, &revision) == PURE_OK); + CHECK(pure_app_start(&app, &module_a, pure_tree_data(path)) == PURE_OK); + CHECK(app.values[0] == 9 && app.values[2] == 0 && app.values[4] == 0); + pure_app_stop(&app); + /* Damaged stored lists and texts are refused, not replaced. */ + const char *damaged[] = {"list-tasks", "text-note"}; + for (unsigned k = 0; k < 2; ++k) { + PureDraft *draft; + CHECK(pure_state_open(path, damaged[k], &draft) == PURE_OK); + CHECK(pure_draft_splice(draft, 0, 0, (PureSpan){(const unsigned char *)"\xff", 1}) == PURE_OK); + CHECK(pure_draft_commit(draft, &revision) == PURE_OK); + CHECK(pure_app_start(&app, &module_a, pure_tree_data(path)) == PURE_STORE_ERROR); + CHECK(pure_draft_splice(draft, 0, 1, (PureSpan){0}) == PURE_OK && pure_draft_commit(draft, &revision) == PURE_OK); + pure_draft_close(draft); + } + CHECK(pure_app_start(&app, &module_a, pure_tree_data(path)) == PURE_OK); + CHECK(pure_list_count(app.lists[TASKS]) == 3 && pure_draft_size(app.texts[NOTE]) == 3 && app.values[0] == 9); + pure_app_stop(&app); + pure_draft_close(values); + remove_store(path); +} + +static void stored_states(void) { + static const char *const list_words[] = {"a", "\xea\xb0\x80", "", "\n", "\xf0\x9f\x98\x80"}; + static const char *const text_words[] = {"a", "\xea\xb0\x80", "\n", "\xf0\x9f\x98\x80", "xy\nz", ""}; + stored_equivalence(list_spec, list_words, LEN(list_words), 0x9e3779b9u); + stored_equivalence(text_spec, text_words, LEN(text_words), 0x7f4a7c15u); + stored_crashes(); + stored_frames(); + stored_messages(); + stored_migration(); +} + +/* ---- Deferred saving ---------------------------------------------------- */ + +typedef struct { uint32_t input; const char *word; } Step; + +static PureResult apply_step(PureApp *app, Step step) { + if (step.word) return pure_app_text(app, step.input, (PureSpan){(const unsigned char *)step.word, strlen(step.word)}); + return pure_app_input(app, step.input, PURE_EDGE_DOWN); +} + +/* Deferred events apply at once and last only through a save: an app that + * stops without saving comes back as it was at the last save. The oracle is + * an app in memory that replays exactly the saved events. */ +static void deferred_equivalence(Spec spec, const char *const *words, size_t word_count, uint32_t seed) { + char *path = new_store(); + CHECK(load(spec, &module_a) == PURE_OK); + static Step history[2000]; + size_t saved = 0, applied = 0; + PureApp memory, stored; + CHECK(pure_app_start(&memory, &module_a, (PureData){0}) == PURE_OK); + CHECK(pure_app_start(&stored, &module_a, pure_tree_data(path)) == PURE_OK); + CHECK(pure_app_defer(&stored, true) && !pure_app_defer(&memory, true)); + unsigned lost = 0, saves = 0; + for (unsigned step = 0; step < 600; ++step) { + Step next = {next_random(&seed) % module_a.inputs, NULL}; + if (module_a.input[next.input].kind == PURE_KIND_TEXT) next.word = words[next_random(&seed) % word_count]; + PureResult a = apply_step(&memory, next), b = apply_step(&stored, next); + CHECK(a == b); + if (a == PURE_OK) history[applied++] = next; + same_states(&memory, &stored); + uint32_t roll = next_random(&seed) % 16; + if (roll < 3) { + CHECK(pure_app_save(&stored) == PURE_OK); + saved = applied; + ++saves; + } else if (roll == 3) { + /* Stop without saving: only saved events come back. */ + pure_app_stop(&stored); + pure_app_stop(&memory); + CHECK(pure_app_start(&stored, &module_a, pure_tree_data(path)) == PURE_OK && pure_app_defer(&stored, true)); + CHECK(pure_app_start(&memory, &module_a, (PureData){0}) == PURE_OK); + for (size_t k = 0; k < saved; ++k) CHECK(apply_step(&memory, history[k]) == PURE_OK); + lost += (unsigned)(applied - saved); + applied = saved; + same_states(&memory, &stored); + } + } + CHECK(saves > 50 && lost > 0); + pure_app_stop(&memory); + pure_app_stop(&stored); + remove_store(path); +} + +/* A burst of events is saved with one commit: when that commit fails every + * event of the burst is undone, and a process that dies while saving comes + * back with all of the burst or none of it. */ +static void deferred_bursts(void) { + char *path = new_store(); + Spec spec = {crash_nums, 1, crash_inputs, 1, NULL, 0, crash_handlers, 1, crash_code, LEN(crash_code), NULL, 0, + crash_states, 4, crash_constants, 2, NULL, 0, crash_records, 1, NULL, 0}; + CHECK(load(spec, &module_a) == PURE_OK); + PureApp app; + CHECK(pure_app_start(&app, &module_a, pure_tree_data(path)) == PURE_OK && pure_app_defer(&app, true)); + for (int i = 0; i < 5; ++i) CHECK(pure_app_input(&app, 0, PURE_EDGE_DOWN) == PURE_OK); + CHECK(consistent(&app) == 5 && app.events == 5); + for (fail_stage = PURE_AFTER_HEADER; fail_stage <= PURE_BEFORE_RENAME; fail_stage += 2) { + CHECK(pure_app_save(&app) == PURE_STORE_ERROR && consistent(&app) == 0 && app.events == 0); + for (int i = 0; i < 5; ++i) CHECK(pure_app_input(&app, 0, PURE_EDGE_DOWN) == PURE_OK); + } + fail_stage = -1; + CHECK(pure_app_save(&app) == PURE_OK && consistent(&app) == 5); + pure_app_stop(&app); + CHECK(pure_app_start(&app, &module_a, pure_tree_data(path)) == PURE_OK && consistent(&app) == 5); + pure_app_stop(&app); + unsigned expected = 5; + for (int stage = PURE_AFTER_HEADER; stage <= PURE_BEFORE_DIR_SYNC; ++stage) { + pid_t child = fork(); + CHECK(child >= 0); + if (!child) { + PureApp doomed; + if (pure_app_start(&doomed, &module_a, pure_tree_data(path)) != PURE_OK || !pure_app_defer(&doomed, true)) _exit(1); + for (int i = 0; i < 7; ++i) if (pure_app_input(&doomed, 0, PURE_EDGE_DOWN) != PURE_OK) _exit(2); + crash = 1; + fail_stage = stage; + pure_app_save(&doomed); + _exit(0); + } + int status; + CHECK(waitpid(child, &status, 0) == child && WIFEXITED(status) && WEXITSTATUS(status) == 77); + if (stage == PURE_BEFORE_DIR_SYNC) expected += 7; + CHECK(pure_app_start(&app, &module_a, pure_tree_data(path)) == PURE_OK && consistent(&app) == expected); + pure_app_stop(&app); + } + remove_store(path); +} + +/* Messages in a burst: documents of different keys commit together with the + * states, each moving one revision; a second message for a key saves the + * burst first, and so does a full burst. */ +static void deferred_messages(void) { + char *path = new_store(); + CHECK(load(editor_spec, &module_a) == PURE_OK); + PureApp app; + unsigned char buffer[64]; + char key[8]; + CHECK(pure_app_start(&app, &module_a, pure_tree_data(path)) == PURE_OK && pure_app_defer(&app, true)); + for (int i = 0; i < 3; ++i) { + snprintf(key, sizeof(key), "k%d", i); + CHECK(pure_app_message(&app, 1, key, 0, edit_payload(buffer, 0, 0, "ab")) == PURE_OK && app.revision == 1); + } + CHECK(app.values[0] == 3 && app.pending_count == 3 && app.open); + /* The same key again: the burst is saved first, then this edit joins a new one. */ + CHECK(pure_app_message(&app, 1, "k0", 1, edit_payload(buffer, 2, 0, "c")) == PURE_OK && app.revision == 2); + CHECK(app.pending_count == 1 && app.values[0] == 4); + CHECK(pure_app_message(&app, 1, "k1", 0, edit_payload(buffer, 0, 0, "x")) == PURE_CONFLICT); + CHECK(pure_app_save(&app) == PURE_OK && !app.open && !app.pending_count); + for (int i = 0; i < PURE_APP_PENDING + 1; ++i) { + snprintf(key, sizeof(key), "m%d", i); + CHECK(pure_app_message(&app, 1, key, 0, edit_payload(buffer, 0, 0, "y")) == PURE_OK); + CHECK(app.pending_count == (i < PURE_APP_PENDING ? (unsigned)i + 1 : 1)); /* full: saved on the way */ + } + pure_app_stop(&app); /* the last edit was never saved */ + CHECK(pure_app_start(&app, &module_a, pure_tree_data(path)) == PURE_OK && app.values[0] == 4 + PURE_APP_PENDING); + CHECK(pure_app_message(&app, 0, "k0", -1, (PureSpan){0}) == PURE_OK && app.revision == 2 && replied(&app, "abc")); + snprintf(key, sizeof(key), "m%d", PURE_APP_PENDING); + CHECK(pure_app_message(&app, 0, key, -1, (PureSpan){0}) == PURE_NOT_FOUND); + snprintf(key, sizeof(key), "m%d", PURE_APP_PENDING - 1); + CHECK(pure_app_message(&app, 0, key, -1, (PureSpan){0}) == PURE_OK && replied(&app, "y")); + pure_app_stop(&app); + remove_store(path); +} + +static void deferred(void) { + static const char *const list_words[] = {"a", "\xea\xb0\x80", "", "\n", "\xf0\x9f\x98\x80"}; + static const char *const text_words[] = {"a", "\xea\xb0\x80", "\n", "\xf0\x9f\x98\x80", "xy\nz", ""}; + deferred_equivalence(list_spec, list_words, LEN(list_words), 0x2545f491u); + deferred_equivalence(text_spec, text_words, LEN(text_words), 0x1b873593u); + deferred_bursts(); + deferred_messages(); +} + +/* Text inserted at a cursor goes before it; at a mark (a cursor that stays), + * after it. Everywhere else, and when text is removed, both move alike. */ +static void marks(void) { + enum { MARK = 2 | PURE_CURSOR_STAYS << 8 }; + static const T textual[] = {{"note", 1, 0}, {"at", 2, 0}, {"mark", MARK, 0}}; + static const char *const constants[] = {"ab"}; + static const I inputs[] = {{"typed", NULL, PURE_KIND_TEXT, false, NULL, 0}, KEY("keep", "KeyK"), KEY("back", "Backspace")}; + static const O code[] = { + {CUL, 1, 0}, {TI, 0, 0}, {TINS, 0, 0}, /* 0 typed: at the cursor */ + {CUL, 1, 0}, {CS, 2, 0}, /* 3 keep: mark = at */ + {CUL, 1, 0}, {C, 0, -1}, {CM, 0, 0}, {CUL, 1, 0}, {TREM, 0, 0}, /* 5 back */ + }; + static const H handlers[] = {{1, 0, 3}, {3, 3, 2}, {5, 5, 5}}; + Spec spec = {NULL, 0, inputs, LEN(inputs), NULL, 0, handlers, LEN(handlers), code, LEN(code), + NULL, 0, textual, 3, constants, 1, NULL, 0, NULL, 0, NULL, 0}; + if (load(spec, &module_a) != PURE_OK) { fprintf(stderr, "%s\n", error); abort(); } + CHECK(module_a.state_flags[2] == PURE_CURSOR_STAYS && !module_a.state_flags[1]); + PureApp app; + CHECK(pure_app_start(&app, &module_a, (PureData){0}) == PURE_OK); + CHECK(pure_app_text(&app, 0, (PureSpan){(const unsigned char *)"x", 1}) == PURE_OK); + CHECK(!strcmp(state_text(&app, 0), "xab") && app.values[1] == 1 && app.values[2] == 0); /* the mark stayed */ + CHECK(pure_app_input(&app, 1, PURE_EDGE_DOWN) == PURE_OK && app.values[2] == 1); + CHECK(pure_app_text(&app, 0, (PureSpan){(const unsigned char *)"yz", 2}) == PURE_OK); + CHECK(!strcmp(state_text(&app, 0), "xyzab") && app.values[1] == 3 && app.values[2] == 1); + CHECK(pure_app_input(&app, 2, PURE_EDGE_DOWN) == PURE_OK && app.values[1] == 2 && app.values[2] == 1); + CHECK(pure_app_input(&app, 2, PURE_EDGE_DOWN) == PURE_OK && app.values[1] == 1 && app.values[2] == 1); /* gathered */ + pure_app_stop(&app); + /* A flag only on a cursor, and only this one. */ + static const T wrong_flag[] = {{"note", 1, 0}, {"at", 2 | 2 << 8, 0}, {"mark", MARK, 0}}; + static const T flagged_text[] = {{"note", 1 | PURE_CURSOR_STAYS << 8, 0}, {"at", 2, 0}, {"mark", 2, 0}}; + Spec bad = spec; + bad.t = wrong_flag; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "state reference")); + bad.t = flagged_text; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "state reference")); +} + +/* Folds: a block run once per item of a list, as a column of it, gives a + * count, a sum, a maximum or a minimum; an empty maximum has no value. */ +enum { FOLD = PURE_OP_FOLD }; +#define FOLDING(kind, list, length) ((uint32_t)(kind) | (uint32_t)(list) << 8 | (uint32_t)(length) << 16) +static const RF fold_fields[] = {{"title", 1, 0}, {"done", 0, 0}, {"points", 0, 0}}; +static const R fold_records[] = {{"task", fold_fields, 3}}; +static const T fold_states[] = {{"tasks", 3, 0}, {"at", 4, 0}}; +static const char *const fold_constants[] = {""}; +static const I fold_inputs[] = {{"typed", NULL, PURE_KIND_TEXT, false, NULL, 0}, KEY("toggle", "KeyT")}; +enum { F_TITLE = 0, F_DONE = 1u << 16, F_POINTS = 2u << 16 }; +static const O fold_code[] = { + {TI, 0, 0}, {C, 0, 0}, {TI, 0, 0}, {CHR, 0, 0}, {LA, 0, 0}, {XE, 0, 0}, {XS, 1, 0}, /* 0 typed */ + {XL, 1, 0}, {XL, 1, 0}, {IG, F_DONE, 0}, {NOT, 0, 0}, {IS, F_DONE, 0}, /* 7 toggle */ + {FOLD, FOLDING(PURE_FOLD_COUNT, 0, 3), 0}, {ROW, 0, 0}, {IG, F_DONE, 0}, {NOT, 0, 0}, /* 12 open */ + {FOLD, FOLDING(PURE_FOLD_SUM, 0, 3), 0}, {ROW, 0, 0}, {IG, F_POINTS, 0}, {C, 0, 1}, /* 16 points */ + {FOLD, FOLDING(PURE_FOLD_MAX, 0, 4), 0}, {ROW, 0, 0}, {IG, F_TITLE, 0}, {CHR, 0, 0}, /* 20 longest */ + {C, 0, 1}, + {FOLD, FOLDING(PURE_FOLD_SUM, 0, 4), 0}, {ROW, 0, 0}, {IG, F_POINTS, 0}, {ROW, 0, 0}, /* 25 done_points */ + {IG, F_DONE, 0}, + {FOLD, FOLDING(PURE_FOLD_MIN, 0, 5), 0}, {ROW, 0, 0}, {IG, F_POINTS, 0}, {ROW, 0, 0}, /* 30 fewest_open */ + {IG, F_DONE, 0}, {NOT, 0, 0}, + {C, 0, 10}, {FOLD, FOLDING(PURE_FOLD_COUNT, 0, 1), 0}, {C, 0, 1}, {ADD, 0, 0}, /* 36 count_plus */ + {FOLD, FOLDING(PURE_FOLD_FIRST, 0, 3), 0}, {ROW, 0, 0}, {IG, F_DONE, 0}, {NOT, 0, 0}, /* 40 first_open */ + {XN, 0, 0}, +}; +static const H fold_handlers[] = {{1, 0, 7}, {3, 7, 5}}; +static const V fold_views[] = {{"open", 12, 4}, {"points", 16, 4}, {"longest", 20, 5}, {"done_points", 25, 5}, + {"fewest_open", 30, 6}, {"count_plus", 36, 4}, {"first_open", 40, 5}}; +static Spec fold_spec(const O *code, size_t count, const V *views, size_t nviews, const H *handlers, size_t nhandlers) { + return (Spec){NULL, 0, fold_inputs, LEN(fold_inputs), views, nviews, handlers, nhandlers, code, count, NULL, 0, + fold_states, 2, fold_constants, 1, NULL, 0, fold_records, 1, NULL, 0}; +} + +static void folds(void) { + CHECK(load(fold_spec(fold_code, LEN(fold_code), fold_views, LEN(fold_views), fold_handlers, 2), &module_a) == PURE_OK); + PureApp app; + double value; + CHECK(pure_app_start(&app, &module_a, (PureData){0}) == PURE_OK); + CHECK(number_view(&app, 0) == 0 && number_view(&app, 1) == 0 && !pure_app_view(&app, 2, &value)); + CHECK(number_view(&app, 3) == 0 && !pure_app_view(&app, 4, &value) && number_view(&app, 5) == 10); + CHECK(!pure_app_view(&app, 6, &value)); /* no first open task yet */ + const char *const words[] = {"a", "bbb", "\xea\xb0\x80\xea\xb0\x80"}; /* one, three and two characters */ + for (size_t i = 0; i < 3; ++i) + CHECK(pure_app_text(&app, 0, (PureSpan){(const unsigned char *)words[i], strlen(words[i])}) == PURE_OK); + CHECK(number_view(&app, 0) == 3 && number_view(&app, 1) == 6 && number_view(&app, 2) == 3); + CHECK(number_view(&app, 3) == 0 && number_view(&app, 4) == 1 && number_view(&app, 5) == 13); + CHECK(pure_app_input(&app, 1, PURE_EDGE_DOWN) == PURE_OK); /* the last task is done */ + CHECK(number_view(&app, 0) == 2 && number_view(&app, 3) == 2 && number_view(&app, 4) == 1); + CHECK(number_view(&app, 6) == 0); /* the first open one: an index */ + CHECK(pure_app_point(&app, 1, 0) == PURE_OK && pure_app_input(&app, 1, PURE_EDGE_DOWN) == PURE_OK); + CHECK(number_view(&app, 6) == 1); + CHECK(pure_app_point(&app, 1, 1) == PURE_OK && pure_app_input(&app, 1, PURE_EDGE_DOWN) == PURE_OK); + CHECK(!pure_app_view(&app, 6, &value)); + CHECK(number_view(&app, 0) == 0 && number_view(&app, 3) == 6 && !pure_app_view(&app, 4, &value)); /* none open */ + pure_app_stop(&app); + + /* What a fold may not be. */ + static const O nested[] = {{FOLD, FOLDING(PURE_FOLD_COUNT, 0, 2), 0}, {FOLD, FOLDING(PURE_FOLD_COUNT, 0, 1), 0}, {C, 0, 1}}; + static const O into[] = {{C, 0, 1}, {JZ, 3, 0}, {FOLD, FOLDING(PURE_FOLD_COUNT, 0, 1), 0}, {C, 0, 1}}; + static const O effect[] = {{FOLD, FOLDING(PURE_FOLD_COUNT, 0, 3), 0}, {ROW, 0, 0}, {XS, 1, 0}, {C, 0, 1}, + {PURE_OP_REQUIRE, 0, 0}}; + static const O short_sum[] = {{FOLD, FOLDING(PURE_FOLD_SUM, 0, 1), 0}, {C, 0, 1}}; + static const O outside[] = {{FOLD, FOLDING(PURE_FOLD_COUNT, 0, 5), 0}, {C, 0, 1}}; + static const O not_list[] = {{FOLD, FOLDING(PURE_FOLD_COUNT, 1, 1), 0}, {C, 0, 1}}; + static const struct { const O *code; size_t count, length; bool handler; const char *reason; } refused[] = { + {nested, LEN(nested), 3, false, "fold inside a fold"}, + {into, LEN(into), 4, false, "branch into a fold"}, + {effect, LEN(effect), 5, true, "fold with an effect"}, + {short_sum, LEN(short_sum), 2, false, "fold block must leave its numbers"}, + {outside, LEN(outside), 2, false, "fold block outside its block"}, + {not_list, LEN(not_list), 2, false, "no such state"}, + }; + for (size_t i = 0; i < LEN(refused); ++i) { + V view = {"v", 0, (uint32_t)refused[i].length}; + H handler = {3, 0, (uint32_t)refused[i].length}; + Spec spec = refused[i].handler ? fold_spec(refused[i].code, refused[i].count, NULL, 0, &handler, 1) + : fold_spec(refused[i].code, refused[i].count, &view, 1, NULL, 0); + if (load(spec, &module_b) != PURE_INVALID || !strstr(error, refused[i].reason)) { + fprintf(stderr, "fold case %zu: expected '%s', got '%s'\n", i, refused[i].reason, error); + abort(); + } + } +} + +/* A filtered table: one row per item its filter keeps; its columns read the + * item (ROW is the item, not the row), and hosts turn rows into items and + * back. The rows follow every change. */ +static const O filter_code[] = { + {TI, 0, 0}, {C, 0, 0}, {TI, 0, 0}, {CHR, 0, 0}, {LA, 0, 0}, {XE, 0, 0}, {XS, 1, 0}, /* 0 typed */ + {XL, 1, 0}, {XL, 1, 0}, {IG, F_DONE, 0}, {NOT, 0, 0}, {IS, F_DONE, 0}, /* 7 toggle */ + {ROW, 0, 0}, {IG, F_DONE, 0}, {NOT, 0, 0}, /* 12 filter: open */ + {ROW, 0, 0}, {IG, F_TITLE, 0}, /* 15 title */ + {ROW, 0, 0}, {XN, 0, 0}, /* 17 pos */ +}; +enum { FILTERED = 2 | 1 << 8 }; /* a table over state 0, filtered */ +static const W filter_views[] = {{"open", FILTERED, 0, 12, 3}, {"title", 1, 1, 15, 2}, {"pos", 0, 1, 17, 2}}; + +static Spec filter_spec(const O *code, size_t count, const W *views, size_t nviews) { + return (Spec){NULL, 0, fold_inputs, LEN(fold_inputs), NULL, 0, fold_handlers, 2, code, count, NULL, 0, + fold_states, 2, fold_constants, 1, NULL, 0, fold_records, 1, views, nviews}; +} + +static const char *cell_title(PureApp *app, uint32_t column, size_t row) { + static Text text; + text = (Text){{0}, 0}; + CHECK(pure_app_cell_text(app, column, row, text_span, &text) == PURE_OK && text.size < sizeof(text.text)); + text.text[text.size] = 0; + return text.text; +} + +static void filters(void) { + CHECK(load(filter_spec(filter_code, LEN(filter_code), filter_views, 3), &module_a) == PURE_OK); + PureApp app; + double value; + size_t at; + CHECK(pure_app_start(&app, &module_a, (PureData){0}) == PURE_OK && pure_app_rows(&app, 0) == 0); + for (const char *word = "abc"; *word; ++word) + CHECK(pure_app_text(&app, 0, (PureSpan){(const unsigned char *)word, 1}) == PURE_OK); + CHECK(pure_app_rows(&app, 0) == 3 && !strcmp(cell_title(&app, 1, 2), "c") && pure_app_cell(&app, 2, 2, &value) && value == 2); + CHECK(pure_app_input(&app, 1, PURE_EDGE_DOWN) == PURE_OK); /* c is done: it leaves */ + CHECK(pure_app_rows(&app, 0) == 2 && !pure_app_cell(&app, 2, 2, &value) && !pure_app_item_row(&app, 0, 2, &at)); + CHECK(pure_app_point(&app, 1, 0) == PURE_OK && pure_app_input(&app, 1, PURE_EDGE_DOWN) == PURE_OK); /* a too */ + CHECK(pure_app_rows(&app, 0) == 1 && !strcmp(cell_title(&app, 1, 0), "b")); + CHECK(pure_app_cell(&app, 2, 0, &value) && value == 1); /* the item's position, not the row's */ + CHECK(pure_app_row_item(&app, 0, 0, &at) && at == 1 && !pure_app_row_item(&app, 0, 1, &at)); + CHECK(pure_app_item_row(&app, 0, 1, &at) && at == 0 && !pure_app_item_row(&app, 0, 0, &at)); + CHECK(pure_app_input(&app, 1, PURE_EDGE_DOWN) == PURE_OK); /* a comes back, before b */ + CHECK(pure_app_rows(&app, 0) == 2 && !strcmp(cell_title(&app, 1, 0), "a") && pure_app_item_row(&app, 0, 1, &at) && at == 1); + CHECK(pure_app_replace(&app, &module_a) == PURE_OK && pure_app_rows(&app, 0) == 2); + pure_app_stop(&app); + + /* What a filter may not be. */ + static const O effect[] = {{ROW, 0, 0}, {XS, 1, 0}, {C, 0, 1}}; + static const O text_filter[] = {{ROW, 0, 0}, {IG, F_TITLE, 0}}; + static const O folded[] = {{FOLD, FOLDING(PURE_FOLD_COUNT, 0, 1), 0}, {C, 0, 1}}; + static const W filtered_by[] = {{"open", FILTERED, 0, 0, 0}}, open3[] = {{"open", FILTERED, 0, 0, 3}}, + open2[] = {{"open", FILTERED, 0, 0, 2}}; + static const W not_a_list[] = {{"open", 2 | 2 << 8, 0, 0, 3}}; + static const W flagged_column[] = {{"open", FILTERED, 0, 0, 3}, {"c", 0 | 1 << 8, 1, 0, 3}}; + static const struct { const O *code; size_t count; const W *views; size_t nviews; const char *reason; } refused[] = { + {effect, LEN(effect), open3, 1, "filter with an effect"}, + {text_filter, LEN(text_filter), open2, 1, "filter must leave one number"}, + {folded, LEN(folded), open2, 1, "fold inside a filter"}, + {effect, LEN(effect), filtered_by, 1, "table list"}, /* a filtered table needs its block */ + {effect, LEN(effect), not_a_list, 1, "table list"}, /* state 1 is an index */ + {effect, LEN(effect), flagged_column, 2, "view type"}, /* only a table has a list byte */ + }; + for (size_t i = 0; i < LEN(refused); ++i) + if (load(filter_spec(refused[i].code, refused[i].count, refused[i].views, refused[i].nviews), &module_b) != PURE_INVALID || + !strstr(error, refused[i].reason)) { + fprintf(stderr, "filter case %zu: expected '%s', got '%s'\n", i, refused[i].reason, error); + abort(); + } +} + +/* Damaged fold and filter modules: whatever loads runs safely. */ +static void fold_mutations(void) { + static unsigned char valid[65536], bytes[65536]; + size_t size = build(valid, fold_spec(fold_code, LEN(fold_code), fold_views, LEN(fold_views), fold_handlers, 2)); + for (unsigned kind = 0; kind < 2; ++kind) { + if (kind) size = build(valid, filter_spec(filter_code, LEN(filter_code), filter_views, 3)); + uint32_t state = kind ? 0x165667b1u : 0x27d4eb2fu; + unsigned accepted = 0; + for (unsigned round = 0; round < 20000; ++round) { + memcpy(bytes, valid, size); + for (unsigned f = 0, flips = 1 + next_random(&state) % 3; f < flips; ++f) + bytes[next_random(&state) % size] ^= (unsigned char)(1u << (next_random(&state) % 8)); + if (pure_module_load(bytes, size, &module_b, error, sizeof(error)) != PURE_OK) continue; + ++accepted; + PureApp app; + if (pure_app_start(&app, &module_b, (PureData){0}) != PURE_OK) continue; + for (unsigned e = 0; e < 16; ++e) { + uint32_t input = next_random(&state) % 2; + if (module_b.input[input].kind == PURE_KIND_TEXT) pure_app_text(&app, input, (PureSpan){(const unsigned char *)"ab", 2}); + else if (module_b.input[input].kind == PURE_KIND_KEY) pure_app_input(&app, input, PURE_EDGE_DOWN); + for (uint32_t v = 0; v < module_b.views; ++v) { + double value; + size_t item; + if (module_b.view_type[v] == PURE_VIEW_TABLE) { + size_t rows = pure_app_rows(&app, v); + for (size_t row = 0; row < rows + 1; ++row) pure_app_row_item(&app, v, row, &item); + } else if (module_b.view_table[v]) { + for (size_t row = 0; row < 4; ++row) + if (module_b.view_type[v] == PURE_VIEW_TEXT) pure_app_cell_text(&app, v, row, ignore_span, NULL); + else pure_app_cell(&app, v, row, &value); + } else if (module_b.view_type[v] == PURE_VIEW_TEXT) pure_app_view_text(&app, v, ignore_span, NULL); + else pure_app_view(&app, v, &value); + } + } + pure_app_stop(&app); + } + printf("{\"%s_module_mutations\":20000,\"accepted_after_damage\":%u}\n", kind ? "filter" : "fold", accepted); + } +} + +/* A host points at an item: the index a view shows as its position moves + * there, as an event with no handler, saved like a key event; deferred, it + * joins the burst and a failed save undoes it with the rest. */ +static void pointing(void) { + CHECK(load(list_spec, &module_a) == PURE_OK); + CHECK(pure_module_position(&module_a, 1) == 2); /* position = at.position */ + CHECK(pure_module_position(&module_a, 0) == -1 && pure_module_position(&module_a, 2) == -1 && + pure_module_position(&module_a, 3) == -1 && pure_module_position(&module_a, 99) == -1); + char path[] = "/tmp/pure-point-XXXXXX"; + CHECK(mkdtemp(path) && pure_store_init(path) == PURE_OK); + PureApp app; + CHECK(pure_app_start(&app, &module_a, pure_tree_data(path)) == PURE_OK); + CHECK(pure_app_point(&app, 2, 0) == PURE_NOT_FOUND); /* nothing to point at */ + for (int i = 0; i < 3; ++i) CHECK(pure_app_text(&app, 0, (PureSpan){(const unsigned char *)"a", 1}) == PURE_OK); + uint64_t events = app.events; + CHECK(app.values[2] == 2 && pure_app_point(&app, 2, 0) == PURE_OK && app.values[2] == 0 && app.events == events + 1); + CHECK(pure_app_point(&app, 2, 3) == PURE_NOT_FOUND && app.values[2] == 0); + CHECK(pure_app_point(&app, 0, 1) == PURE_INVALID && pure_app_point(&app, 1, 1) == PURE_INVALID); /* a number, a list */ + CHECK(pure_app_point(&app, 2, 1) == PURE_OK); + pure_app_stop(&app); + CHECK(pure_app_start(&app, &module_a, pure_tree_data(path)) == PURE_OK && app.values[2] == 1); + CHECK(pure_app_defer(&app, true) && pure_app_point(&app, 2, 2) == PURE_OK && app.open && app.values[2] == 2); + CHECK(pure_app_save(&app) == PURE_OK); + pure_app_stop(&app); + CHECK(pure_app_start(&app, &module_a, pure_tree_data(path)) == PURE_OK && app.values[2] == 2); + pure_app_stop(&app); + remove_store(path); +} + +/* Keyed lists: items in key order (texts by bytes, numbers by value), each + * key once; found by key; a list that becomes keyed is put in order with + * its indices following their items, or refused when two items share a key. */ +enum { FIND = PURE_OP_LIST_FIND, HAS = PURE_OP_LIST_HAS, TCMP = PURE_OP_TEXT_COMPARE, + PEOPLE = 1, K_AT = 2, SCORES = 3, K_NAME = 0, K_VISITS = 1u << 16 }; +static const S keyed_nums[] = {{"n", 0}}; +static const T keyed_states[] = {{"people", 3 | 1 << 8, 0}, {"at", 4, 1}, {"scores", 3 | 1 << 8, 1}}; +static const T unkeyed_states[] = {{"people", 3, 0}, {"at", 4, 1}, {"scores", 3, 1}}; +static const RF person_fields[] = {{"name", 1, 0}, {"visits", 0, 0}}; +static const RF score_fields[] = {{"score", 0, 0}}; +static const R keyed_records[] = {{"person", person_fields, 2}, {"score", score_fields, 1}}; +static const char *const keyed_constants[] = {"", "bob", "m"}; +static const I keyed_inputs[] = { + {"typed", NULL, PURE_KIND_TEXT, false, NULL, 0}, {"seek", NULL, PURE_KIND_TEXT, false, NULL, 0}, + {"has", NULL, PURE_KIND_TEXT, false, NULL, 0}, KEY("drop", "Delete"), KEY("bump", "KeyB"), + KEY("two", "KeyN"), KEY("zero", "KeyO"), KEY("minus_zero", "KeyM"), {"twice", NULL, PURE_KIND_TEXT, false, NULL, 0}, +}; +static const O keyed_code[] = { + {TI, 0, 0}, {C, 0, 0}, {LA, PEOPLE, 0}, {TI, 0, 0}, {FIND, PEOPLE, 0}, {XS, K_AT, 0}, /* 0 typed: add, point at it */ + {TI, 0, 0}, {FIND, PEOPLE, 0}, {XS, K_AT, 0}, /* 6 seek */ + {TI, 0, 0}, {HAS, PEOPLE, 0}, {ST, 0, 0}, /* 9 has */ + {XL, K_AT, 0}, {LR, PEOPLE, 0}, /* 12 drop */ + {XL, K_AT, 0}, {XL, K_AT, 0}, {IG, PEOPLE | K_VISITS, 0}, {C, 0, 1}, {ADD, 0, 0}, /* 14 bump */ + {IS, PEOPLE | K_VISITS, 0}, + {C, 0, 2}, {LA, SCORES, 0}, {C, 0, 0}, {LA, SCORES, 0}, {C, 0, -0.0}, {LA, SCORES, 0}, /* 20 two, zero, minus_zero */ + {TI, 0, 0}, {C, 0, 0}, {LA, PEOPLE, 0}, {TI, 0, 0}, {C, 0, 0}, {LA, PEOPLE, 0}, /* 26 twice: always exists */ + {LC, PEOPLE, 0}, /* 32 view count */ + {XL, K_AT, 0}, {XN, 0, 0}, /* 33 view position */ + {XL, K_AT, 0}, {IG, PEOPLE | K_NAME, 0}, {TK, 1, 0}, {TCMP, PURE_EQUAL, 0}, /* 35 view is_bob */ + {XL, K_AT, 0}, {IG, PEOPLE | K_NAME, 0}, {TK, 2, 0}, {TCMP, PURE_LESS, 0}, /* 39 view before_m */ + {LC, SCORES, 0}, /* 43 view scores */ + {XL, K_AT, 0}, {IG, PEOPLE | K_NAME, 0}, /* 44 view current */ +}; +static const H keyed_handlers[] = {{1, 0, 6}, {3, 6, 3}, {5, 9, 3}, {7, 12, 2}, {9, 14, 6}, {11, 20, 2}, {13, 22, 2}, + {15, 24, 2}, {17, 26, 6}}; +static const V keyed_views[] = {{"count", 32, 1}, {"position", 33, 2}, {"is_bob", 35, 4}, {"before_m", 39, 4}, + {"scores_count", 43, 1}}; +static const V keyed_text_views[] = {{"current", 44, 2}}; +/* Unkeyed, the same states: typed appends and points at the new last item. */ +static const O unkeyed_code[] = {{TI, 0, 0}, {C, 0, 0}, {LA, PEOPLE, 0}, {XE, PEOPLE, 0}, {XS, K_AT, 0}}; +static const H unkeyed_handlers[] = {{1, 0, 5}}; + +static Spec keyed_spec(const T *states, const O *code, size_t count, const H *handlers, size_t nhandlers) { + bool views = code == keyed_code; + return (Spec){keyed_nums, 1, keyed_inputs, LEN(keyed_inputs), keyed_views, views ? LEN(keyed_views) : 0, handlers, + nhandlers, code, count, NULL, 0, states, LEN(keyed_states), keyed_constants, LEN(keyed_constants), + keyed_text_views, views ? 1 : 0, keyed_records, 2, NULL, 0}; +} + +static PureResult type_text(PureApp *app, uint32_t input, const char *text) { + return pure_app_text(app, input, (PureSpan){(const unsigned char *)text, strlen(text)}); +} + +/* A list's first field (text) of every item, comma separated. */ +static const char *names_of(const PureApp *app, uint32_t list) { + static char out[512]; + size_t used = 0; + for (size_t at = 0; at < pure_list_count(app->lists[list]); ++at) { + PureCell cell = pure_list_get(app->lists[list], at, 0); + CHECK(used + cell.size + 2 < sizeof(out)); + if (at) out[used++] = ','; + if (cell.size) memcpy(out + used, cell.text, cell.size); + used += cell.size; + } + out[used] = 0; + return out; +} + +static void keyed(void) { + CHECK(load(keyed_spec(keyed_states, keyed_code, LEN(keyed_code), keyed_handlers, LEN(keyed_handlers)), &module_a) == PURE_OK); + PureApp app; + CHECK(pure_app_start(&app, &module_a, (PureData){0}) == PURE_OK); + for (const char *const *word = (const char *const[]){"m", "b", "z", "a", NULL}; *word; ++word) + CHECK(type_text(&app, 0, *word) == PURE_OK); + CHECK(!strcmp(names_of(&app, PEOPLE), "a,b,m,z") && app.values[K_AT] == 0 && !strcmp(view_text(&app, 5), "a")); + /* A key once: the add fails, and so does an event whose second add repeats its first. */ + CHECK(type_text(&app, 0, "b") == PURE_CONFLICT && app.fault == PURE_FAULT_EXISTS); + CHECK(type_text(&app, 8, "c") == PURE_CONFLICT && !strcmp(names_of(&app, PEOPLE), "a,b,m,z") && app.values[K_AT] == 0); + CHECK(type_text(&app, 1, "z") == PURE_OK && app.values[K_AT] == 3 && !strcmp(view_text(&app, 5), "z")); + CHECK(type_text(&app, 1, "q") == PURE_NOT_FOUND && app.fault == PURE_FAULT_NOT_FOUND && app.values[K_AT] == 3); + CHECK(type_text(&app, 2, "m") == PURE_OK && app.values[0] == 1); + CHECK(type_text(&app, 2, "c") == PURE_OK && app.values[0] == 0); + CHECK(pure_app_input(&app, 4, PURE_EDGE_DOWN) == PURE_OK && pure_list_get(app.lists[PEOPLE], 3, 1).num == 1); + CHECK(pure_app_input(&app, 3, PURE_EDGE_DOWN) == PURE_OK && !strcmp(names_of(&app, PEOPLE), "a,b,m")); + CHECK(app.values[K_AT] == 2 && number_view(&app, 2) == 0 && number_view(&app, 3) == 0); /* "m": not bob, not before m */ + CHECK(type_text(&app, 1, "b") == PURE_OK && number_view(&app, 2) == 0 && number_view(&app, 3) == 1); + CHECK(type_text(&app, 0, "bob") == PURE_OK && number_view(&app, 2) == 1 && number_view(&app, 3) == 1); + /* Bytes order texts: a text before the longer ones it begins, UTF-8 after ASCII, the empty text first. */ + CHECK(type_text(&app, 0, "\xea\xb0\x80") == PURE_OK && type_text(&app, 0, "ab") == PURE_OK); + CHECK(type_text(&app, 0, "") == PURE_OK && type_text(&app, 0, "") == PURE_CONFLICT); + CHECK(!strcmp(names_of(&app, PEOPLE), ",a,ab,b,bob,m,\xea\xb0\x80") && app.values[K_AT] == 0); + /* Numbers order by value, and -0 is the key 0. */ + CHECK(pure_app_input(&app, 5, PURE_EDGE_DOWN) == PURE_OK && pure_app_input(&app, 6, PURE_EDGE_DOWN) == PURE_OK); + CHECK(pure_app_input(&app, 7, PURE_EDGE_DOWN) == PURE_CONFLICT && number_view(&app, 4) == 2); + CHECK(pure_list_get(app.lists[SCORES], 0, 0).num == 0 && !signbit(pure_list_get(app.lists[SCORES], 0, 0).num) && + pure_list_get(app.lists[SCORES], 1, 0).num == 2); + + /* Replacing: unkeyed, the list stays as it is and takes appends at its end. */ + CHECK(load(keyed_spec(unkeyed_states, unkeyed_code, LEN(unkeyed_code), unkeyed_handlers, 1), &module_b) == PURE_OK); + CHECK(pure_app_replace(&app, &module_b) == PURE_OK && type_text(&app, 0, "c") == PURE_OK); + CHECK(!strcmp(names_of(&app, PEOPLE), ",a,ab,b,bob,m,\xea\xb0\x80,c") && app.values[K_AT] == 7); + CHECK(pure_app_point(&app, K_AT, 6) == PURE_OK); /* at the Korean name */ + /* Keyed again: put in order, the index following its item. */ + CHECK(pure_app_replace(&app, &module_a) == PURE_OK && !strcmp(names_of(&app, PEOPLE), ",a,ab,b,bob,c,m,\xea\xb0\x80")); + CHECK(app.values[K_AT] == 7 && !strcmp(view_text(&app, 5), "\xea\xb0\x80")); + /* Two items with one key cannot become keyed: the app keeps its module and items. */ + CHECK(pure_app_replace(&app, &module_b) == PURE_OK && type_text(&app, 0, "a") == PURE_OK); + CHECK(pure_app_replace(&app, &module_a) == PURE_CONFLICT && app.module == &module_b && pure_list_count(app.lists[PEOPLE]) == 9); + pure_app_stop(&app); + + /* Stored: a list that becomes keyed is stored in order, once. */ + char *path = new_store(); + CHECK(pure_app_start(&app, &module_b, pure_tree_data(path)) == PURE_OK); + for (const char *const *word = (const char *const[]){"m", "b", "z", NULL}; *word; ++word) + CHECK(type_text(&app, 0, *word) == PURE_OK); + CHECK(pure_app_point(&app, K_AT, 1) == PURE_OK); + pure_app_stop(&app); + for (int round = 0; round < 2; ++round) { + CHECK(pure_app_start(&app, &module_a, pure_tree_data(path)) == PURE_OK); + CHECK(!strcmp(names_of(&app, PEOPLE), "b,m,z") && app.values[K_AT] == 0); + pure_app_stop(&app); + } + CHECK(pure_app_start(&app, &module_b, pure_tree_data(path)) == PURE_OK && type_text(&app, 0, "m") == PURE_OK); + pure_app_stop(&app); + CHECK(pure_app_start(&app, &module_a, pure_tree_data(path)) == PURE_CONFLICT); + CHECK(pure_app_start(&app, &module_b, pure_tree_data(path)) == PURE_OK && !strcmp(names_of(&app, PEOPLE), "b,m,z,m")); + pure_app_stop(&app); + remove_store(path); + static const char *const words[] = {"a", "b", "ab", "", "\xea\xb0\x80", "zz"}; + for (uint32_t seed = 1; seed <= 3; ++seed) + stored_equivalence(keyed_spec(keyed_states, keyed_code, LEN(keyed_code), keyed_handlers, LEN(keyed_handlers)), + words, LEN(words), seed * 0x9e3779b9u); + + /* What a keyed list and a text comparison may not be. */ + static const O insert[] = {{XF, PEOPLE, 0}, {TK, 0, 0}, {C, 0, 0}, {LI, PEOPLE, 0}}; + static const O set_key[] = {{XL, K_AT, 0}, {TK, 0, 0}, {IS, PEOPLE | K_NAME, 0}}; + static const O find_number[] = {{C, 0, 1}, {FIND, PEOPLE, 0}, {XS, K_AT, 0}}; + static const O find[] = {{TI, 0, 0}, {FIND, PEOPLE, 0}, {XS, K_AT, 0}}; + static const O relation[] = {{TI, 0, 0}, {TI, 0, 0}, {TCMP, PURE_NOT_EQUAL + 1, 0}, {ST, 0, 0}}; + static const O compare_numbers[] = {{C, 0, 1}, {C, 0, 1}, {TCMP, PURE_EQUAL, 0}, {ST, 0, 0}}; + static const T far_key[] = {{"people", 3 | 3 << 8, 0}, {"at", 4, 1}, {"scores", 3, 1}}; + static const T keyed_index[] = {{"people", 3, 0}, {"at", 4 | 1 << 8, 1}, {"scores", 3, 1}}; + static const struct { const T *states; const O *code; size_t count; const char *reason; } refused[] = { + {keyed_states, insert, LEN(insert), "insert by position into a keyed list"}, + {keyed_states, set_key, LEN(set_key), "change of a keyed list's key"}, + {keyed_states, find_number, LEN(find_number), "operand type"}, + {unkeyed_states, find, LEN(find), "no such state"}, + {keyed_states, relation, LEN(relation), "no such state"}, + {keyed_states, compare_numbers, LEN(compare_numbers), "operand type"}, + {far_key, unkeyed_code, LEN(unkeyed_code), "state reference"}, + {keyed_index, unkeyed_code, LEN(unkeyed_code), "state reference"}, + }; + for (size_t i = 0; i < LEN(refused); ++i) { + H handler = {1, 0, (uint32_t)refused[i].count}; + if (load(keyed_spec(refused[i].states, refused[i].code, refused[i].count, &handler, 1), &module_b) != PURE_INVALID || + !strstr(error, refused[i].reason)) { + fprintf(stderr, "keyed case %zu: expected '%s', got '%s'\n", i, refused[i].reason, error); + abort(); + } + } +} + +/* Damaged keyed modules: whatever loads keeps every keyed list in strict key + * order and every index on an item. */ +static void keyed_mutations(void) { + static unsigned char valid[65536], bytes[65536]; + size_t size = build(valid, keyed_spec(keyed_states, keyed_code, LEN(keyed_code), keyed_handlers, LEN(keyed_handlers))); + static const char *const words[] = {"a", "b", "ab", "", "\xea\xb0\x80"}; + uint32_t state = 0x6c8e9cf5u; + unsigned accepted = 0; + for (unsigned round = 0; round < 20000; ++round) { + memcpy(bytes, valid, size); + for (unsigned f = 0, flips = 1 + next_random(&state) % 3; f < flips; ++f) + bytes[next_random(&state) % size] ^= (unsigned char)(1u << (next_random(&state) % 8)); + if (pure_module_load(bytes, size, &module_b, error, sizeof(error)) != PURE_OK) continue; + ++accepted; + PureApp app; + if (pure_app_start(&app, &module_b, (PureData){0}) != PURE_OK) continue; + for (unsigned e = 0; e < 24; ++e) { + uint32_t input = next_random(&state) % module_b.inputs; + if (module_b.input[input].kind == PURE_KIND_TEXT) type_text(&app, input, words[next_random(&state) % LEN(words)]); + else if (module_b.input[input].kind == PURE_KIND_KEY) pure_app_input(&app, input, PURE_EDGE_DOWN); + for (uint32_t v = 0; v < module_b.views; ++v) { + double value; + if (module_b.view_type[v] == PURE_VIEW_TEXT) pure_app_view_text(&app, v, ignore_span, NULL); + else pure_app_view(&app, v, &value); + } + for (uint32_t s = 0; s < module_b.states; ++s) { + if (module_b.state_type[s] == PURE_STATE_INDEX) { + size_t count = pure_list_count(app.lists[module_b.state_ref[s]]); + CHECK(app.values[s] == floor(app.values[s]) && app.values[s] >= 0 && + app.values[s] <= (count ? (double)(count - 1) : 0)); + } + if (module_b.state_type[s] != PURE_STATE_LIST || !module_b.state_key[s]) continue; + unsigned key = module_b.state_key[s] - 1u; + bool text = module_b.record_field_text[module_b.record[module_b.state_ref[s]].first + key]; + for (size_t at = 1; at < pure_list_count(app.lists[s]); ++at) { + PureCell a = pure_list_get(app.lists[s], at - 1, key), b = pure_list_get(app.lists[s], at, key); + if (!text) { CHECK(a.num < b.num); continue; } + size_t shorter = a.size < b.size ? a.size : b.size; + int order = shorter ? memcmp(a.text, b.text, shorter) : 0; + CHECK(order < 0 || (!order && a.size < b.size)); + } + } + } + pure_app_stop(&app); + } + printf("{\"keyed_module_mutations\":20000,\"accepted_after_damage\":%u}\n", accepted); +} + +/* ---- Snapshots. Everything an app's states and views show, as text (safe + * on any thread): a reader of a snapshot must show what the app showed. */ +typedef struct { char *text; size_t used, size; } Shown; + +static bool show_span(void *context, PureSpan span) { + Shown *s = context; + CHECK(s->used + span.size < s->size); + if (span.size) memcpy(s->text + s->used, span.data, span.size); + s->used += span.size; + return true; +} + +static void show(Shown *s, const char *format, double value) { + int n = snprintf(s->text + s->used, s->size - s->used, format, value); + CHECK(n >= 0 && (size_t)n < s->size - s->used); + s->used += (size_t)n; +} + +static void describe(PureApp *app, Shown *s) { + const PureModule *m = app->module; + s->used = 0; + for (uint32_t i = 0; i < m->states; ++i) { + if (m->state_type[i] == PURE_STATE_TEXT) + CHECK(pure_draft_read(app->texts[i], 0, pure_draft_size(app->texts[i]), show_span, s) == PURE_OK); + else if (m->state_type[i] == PURE_STATE_LIST) { + const PureRecord *r = &m->record[m->state_ref[i]]; + for (size_t at = 0; at < pure_list_count(app->lists[i]); ++at) + for (unsigned f = 0; f < r->count; ++f) { + PureCell cell = pure_list_get(app->lists[i], at, f); + if (m->record_field_text[r->first + f]) show_span(s, (PureSpan){cell.text, cell.size}); + else show(s, "%g", cell.num); + show(s, f + 1 < r->count ? "," : ";", 0); + } + } else show(s, "%g", app->values[i]); + show(s, "|", 0); + } + for (uint32_t v = 0; v < m->views; ++v) { + double value; + if (m->view_table[v] || m->view_type[v] == PURE_VIEW_TABLE) continue; + if (m->view_type[v] == PURE_VIEW_TEXT) { + if (pure_app_view_text(app, v, show_span, s) != PURE_OK) show(s, "!", 0); + } else if (pure_app_view(app, v, &value)) show(s, "%g", value); + else show(s, "!", 0); + show(s, "|", 0); + } + s->text[s->used] = 0; +} + +/* One random event of the keyed app (see keyed), saved as it returns. */ +static void keyed_event(PureApp *app, uint32_t *seed) { + static const char *const names[] = {"a", "b", "ab", "", "\xea\xb0\x80", "zz", "bob", "m", "q", "c"}; + uint32_t input = next_random(seed) % app->module->inputs; + if (app->module->input[input].kind == PURE_KIND_TEXT) type_text(app, input, names[next_random(seed) % LEN(names)]); + else pure_app_input(app, input, PURE_EDGE_DOWN); +} + +/* A snapshot shows the states of the save before it, as they were, however + * the app goes on (items it changes or drops, a module it switches to, even + * after it stops and its store closes); a change not saved yet refuses one, + * and a save that fails is never shown. */ +static size_t snapshot_retired, snapshot_reads; + +static void snapshots_kept(Spec spec, const Spec *other, void (*event)(PureApp *, uint32_t *), unsigned steps) { + enum { KEPT = 8, SIZE = 1 << 16 }; + static char texts[KEPT + 2][SIZE]; + char *path = new_store(); + PureStore *store; + CHECK(load(spec, &module_a) == PURE_OK && pure_store_open(path, &store) == PURE_OK); + CHECK(!other || load(*other, &module_b) == PURE_OK); + PureApp app, reader = {0}; + CHECK(pure_app_start(&app, &module_a, pure_store_data(store)) == PURE_OK); + PureSnapshot *kept[KEPT] = {NULL}; + Shown seen[KEPT], now = {texts[KEPT], 0, SIZE}, shown = {texts[KEPT + 1], 0, SIZE}; + for (unsigned k = 0; k < KEPT; ++k) seen[k] = (Shown){texts[k], 0, SIZE}; + uint32_t seed = 0x51a95u; + for (unsigned step = 0; step < steps; ++step) { + /* Late on, another module (the keyed app unkeyed), and back if it can. */ + if (other && (step == steps - 400 || step == steps - 300)) + CHECK(pure_app_replace(&app, app.module == &module_a ? &module_b : &module_a) != PURE_INVALID); + event(&app, &seed); + snapshot_retired += app.retired.count; + PureSnapshot *made = pure_app_snapshot(&app); + CHECK(made); + describe(&app, &now); + pure_app_read(&reader, made); + describe(&reader, &shown); + CHECK(!strcmp(now.text, shown.text)); + unsigned slot = next_random(&seed) % KEPT; + if (kept[slot]) { + pure_app_read(&reader, kept[slot]); + describe(&reader, &shown); + CHECK(!strcmp(seen[slot].text, shown.text)); + pure_snapshot_release(kept[slot]); + } + kept[slot] = made; + memcpy(seen[slot].text, now.text, now.used + 1); + } + /* Deferred: an unsaved change refuses a snapshot, and a failed save + * leaves the one before it true. */ + CHECK(pure_app_defer(&app, true)); + describe(&app, &now); + PureResult saved = PURE_OK; + for (unsigned tries = 0; tries < 64 && saved == PURE_OK; ++tries) { + event(&app, &seed); + if (!app.open) continue; + CHECK(!pure_app_snapshot(&app)); + fail_stage = PURE_AFTER_HEADER; + saved = pure_app_save(&app); /* OK when the event changed nothing */ + fail_stage = -1; + } + CHECK(saved == PURE_STORE_ERROR); + PureSnapshot *made = pure_app_snapshot(&app); + CHECK(made); + pure_app_read(&reader, made); + describe(&reader, &shown); + CHECK(!strcmp(now.text, shown.text)); + pure_snapshot_release(made); + /* The kept ones outlive the app and its store. */ + pure_app_stop(&app); + pure_store_close(store); + for (unsigned k = 0; k < KEPT; ++k) { + pure_app_read(&reader, kept[k]); + describe(&reader, &shown); + CHECK(!strcmp(seen[k].text, shown.text)); + pure_snapshot_release(kept[k]); + } + pure_app_stop(&reader); + remove_store(path); +} + +/* Readers on two threads take the newest snapshot while the app applies + * events and makes one after each save: each shows what the app showed. */ +typedef struct { + pthread_mutex_t lock; + PureSnapshot *newest; + char *seen; + bool done; + unsigned reads; +} Published; + +static void *read_newest(void *context) { + Published *p = context; + PureApp reader = {0}; + static _Thread_local char a[1 << 16], b[1 << 16]; + Shown expected = {a, 0, sizeof(a)}, shown = {b, 0, sizeof(b)}; + for (bool done = false; !done;) { + pthread_mutex_lock(&p->lock); + PureSnapshot *s = p->newest; + if (s) { + pure_snapshot_hold(s); + strcpy(expected.text, p->seen); + } + done = p->done; + pthread_mutex_unlock(&p->lock); + if (!s) continue; + pure_app_read(&reader, s); + describe(&reader, &shown); + CHECK(!strcmp(expected.text, shown.text)); + pure_snapshot_release(s); + __atomic_add_fetch(&p->reads, 1, __ATOMIC_RELAXED); + } + pure_app_stop(&reader); + return NULL; +} + +static void snapshots_read(Spec spec, void (*event)(PureApp *, uint32_t *), unsigned steps) { + static char seen[1 << 16], now[1 << 16]; + char *path = new_store(); + PureStore *store; + CHECK(load(spec, &module_a) == PURE_OK && pure_store_open(path, &store) == PURE_OK); + PureApp app; + CHECK(pure_app_start(&app, &module_a, pure_store_data(store)) == PURE_OK); + Published p = {.lock = PTHREAD_MUTEX_INITIALIZER, .seen = seen}; + pthread_t readers[2]; + for (unsigned r = 0; r < 2; ++r) CHECK(pthread_create(&readers[r], NULL, read_newest, &p) == 0); + Shown shown = {now, 0, sizeof(now)}; + uint32_t seed = 0x7eadu; + for (unsigned step = 0; step < steps; ++step) { + event(&app, &seed); + PureSnapshot *made = pure_app_snapshot(&app); + CHECK(made); + describe(&app, &shown); + pthread_mutex_lock(&p.lock); + PureSnapshot *old = p.newest; + p.newest = made; + memcpy(seen, shown.text, shown.used + 1); + pthread_mutex_unlock(&p.lock); + pure_snapshot_release(old); + } + pthread_mutex_lock(&p.lock); + p.done = true; + pthread_mutex_unlock(&p.lock); + for (unsigned r = 0; r < 2; ++r) CHECK(pthread_join(readers[r], NULL) == 0); + CHECK(p.reads > steps / 4); + snapshot_reads += p.reads; + pure_snapshot_release(p.newest); + pure_app_stop(&app); + pure_store_close(store); + remove_store(path); +} + +static void crash_event(PureApp *app, uint32_t *seed) { + (void)seed; + CHECK(pure_app_input(app, 0, PURE_EDGE_DOWN) == PURE_OK); +} + +static void snapshots(void) { + Spec keyed = keyed_spec(keyed_states, keyed_code, LEN(keyed_code), keyed_handlers, LEN(keyed_handlers)); + Spec crashing = {crash_nums, 1, crash_inputs, 1, NULL, 0, crash_handlers, 1, crash_code, LEN(crash_code), NULL, 0, + crash_states, 4, crash_constants, 2, NULL, 0, crash_records, 1, NULL, 0}; + Spec unkeyed = keyed_spec(unkeyed_states, unkeyed_code, LEN(unkeyed_code), unkeyed_handlers, 1); + snapshots_kept(keyed, &unkeyed, keyed_event, 3000); + snapshots_kept(crashing, NULL, crash_event, 300); + snapshots_read(keyed, keyed_event, 3000); + snapshots_read(crashing, crash_event, 300); + /* Without stored states (texts only in memory) there is no snapshot. */ + CHECK(load(crashing, &module_a) == PURE_OK); + PureApp app; + CHECK(pure_app_start(&app, &module_a, (PureData){0}) == PURE_OK && !pure_app_snapshot(&app)); + pure_app_stop(&app); + CHECK(snapshot_retired > 100); + printf("{\"snapshots\":6600,\"items_retired\":%zu,\"reads_on_threads\":%zu}\n", snapshot_retired, snapshot_reads); +} + +/* A message of a text, a number, bytes and a u32, in that order: the prefix + * holds the text's length, the number and the u32; the text's bytes come + * first after it and the bytes (the last variable field) take the rest. A + * length past the payload, a text that is not UTF-8 or a number that is not + * finite fails the message. */ +enum { TSET = PURE_OP_TEXT_SET }; +static void message_fields(void) { + static const S nums[] = {{"n", 0}}; + static const T texts[] = {{"title", 1, 0}}; + static const char *const constants[] = {""}; + static const F fields[] = {{"title", PURE_FIELD_TEXT}, {"points", PURE_FIELD_NUMBER}, {"note", PURE_FIELD_BYTES}, + {"count", PURE_FIELD_U32}}; + static const I inputs[] = {{"post", NULL, PURE_KIND_MESSAGE, false, fields, 4}}; + static const O code[] = {{FIELD, 1, 0}, {FIELD, 3, 0}, {ADD, 0, 0}, {ST, 0, 0}, {FIELD, 0, 0}, {TSET, 1, 0}, + {FIELD, 2, 0}, {REPLY, 0, 0}}; + static const H handlers[] = {{1, 0, 8}}; + Spec spec = {nums, 1, inputs, 1, NULL, 0, handlers, 1, code, LEN(code), NULL, 0, texts, 1, constants, 1, NULL, 0, + NULL, 0, NULL, 0}; + if (load(spec, &module_a) != PURE_OK) { fprintf(stderr, "%s\n", error); abort(); } + CHECK(module_a.input[0].prefix == 16 && module_a.field[0].offset == 0 && module_a.field[1].offset == 4 && + module_a.field[2].offset == PURE_FIELD_REST && module_a.field[3].offset == 12); + PureApp app; + CHECK(pure_app_start(&app, &module_a, (PureData){0}) == PURE_OK); + unsigned char payload[64]; + /* title "가나" (6 bytes), points 2.5, count 3, then the title's bytes and note "xyz". */ + size_t size = 0; + uint32_t title_size = 6, count = 3; + double points = 2.5; + memcpy(payload, &title_size, 4); + memcpy(payload + 4, &points, 8); + memcpy(payload + 12, &count, 4); + memcpy(payload + 16, "\xea\xb0\x80\xeb\x82\x98" "xyz", 9); + size = 25; + CHECK(pure_app_message(&app, 0, NULL, -1, (PureSpan){payload, size}) == PURE_OK); + CHECK(app.values[0] == 5.5 && !strcmp(state_text(&app, 1), "\xea\xb0\x80\xeb\x82\x98") && replied(&app, "xyz")); + pure_app_finish(&app); + /* Empty variable fields. */ + title_size = 0; + memcpy(payload, &title_size, 4); + CHECK(pure_app_message(&app, 0, NULL, -1, (PureSpan){payload, 16}) == PURE_OK && !*state_text(&app, 1) && replied(&app, "")); + pure_app_finish(&app); + /* A title longer than what is there, a title that is not UTF-8, a number that is not finite, a short prefix. */ + title_size = 10; + memcpy(payload, &title_size, 4); + CHECK(pure_app_message(&app, 0, NULL, -1, (PureSpan){payload, 25}) == PURE_LIMIT && app.fault == PURE_FAULT_LIMIT); + title_size = 2; + memcpy(payload, &title_size, 4); + memcpy(payload + 16, "\xff\xfe", 2); + CHECK(pure_app_message(&app, 0, NULL, -1, (PureSpan){payload, 18}) == PURE_INVALID && app.fault == PURE_FAULT_ENCODING); + title_size = 0; + points = NAN; + memcpy(payload, &title_size, 4); + memcpy(payload + 4, &points, 8); + CHECK(pure_app_message(&app, 0, NULL, -1, (PureSpan){payload, 16}) == PURE_INVALID && app.fault == PURE_FAULT_NON_FINITE); + CHECK(pure_app_message(&app, 0, NULL, -1, (PureSpan){payload, 15}) == PURE_LIMIT); + CHECK(app.values[0] == 5.5 && !*state_text(&app, 1)); /* failed messages changed nothing */ + pure_app_stop(&app); + /* A text field is text and a bytes field bytes. */ + static const O text_as_bytes[] = {{FIELD, 0, 0}, {LEN_, 0, 0}, {ST, 0, 0}}; + static const O bytes_as_text[] = {{FIELD, 2, 0}, {TSET, 1, 0}}; + static const H three[] = {{1, 0, 3}}, two[] = {{1, 0, 2}}; + Spec bad = spec; + bad.o = text_as_bytes; bad.no = 3; bad.h = three; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "operand type")); + bad.o = bytes_as_text; bad.no = 2; bad.h = two; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "operand type")); + + /* Placed by the host: the variable fields wherever they are in the + * payload (here a JSON body after the prefix), in any order; the + * prefix's lengths are not read. */ + CHECK(pure_app_start(&app, &module_a, (PureData){0}) == PURE_OK); + static const char body[] = "{\"note\":\"xyz\",\"title\":\"\xea\xb0\x80\xeb\x82\x98\"}"; + points = 2.5; + title_size = 999; + memcpy(payload, &title_size, 4); + memcpy(payload + 4, &points, 8); + memcpy(payload + 12, &count, 4); + memcpy(payload + 16, body, sizeof(body) - 1); + size = 16 + sizeof(body) - 1; + uint32_t placed[8] = {16 + 23, 6, 0, 0, 16 + 9, 3, 0, 0}; + CHECK(pure_app_message_fields(&app, 0, NULL, -1, (PureSpan){payload, size}, placed) == PURE_OK); + CHECK(app.values[0] == 5.5 && !strcmp(state_text(&app, 1), "\xea\xb0\x80\xeb\x82\x98") && replied(&app, "xyz")); + pure_app_finish(&app); + /* A field that starts or ends past the payload, or a title that is not UTF-8 there. */ + placed[0] = (uint32_t)size + 1; + CHECK(pure_app_message_fields(&app, 0, NULL, -1, (PureSpan){payload, size}, placed) == PURE_LIMIT); + placed[0] = (uint32_t)size - 2; + placed[1] = 3; + CHECK(pure_app_message_fields(&app, 0, NULL, -1, (PureSpan){payload, size}, placed) == PURE_LIMIT); + placed[0] = 16 + 24; + placed[1] = 2; + CHECK(pure_app_message_fields(&app, 0, NULL, -1, (PureSpan){payload, size}, placed) == PURE_INVALID && + app.fault == PURE_FAULT_ENCODING); + CHECK(app.values[0] == 5.5); + pure_app_stop(&app); + + /* Fields in groups: a name is a path of identifiers (user.name), and + * never both a field and a group. */ + static const F grouped[] = {{"user.name", PURE_FIELD_TEXT}, {"user.age", PURE_FIELD_U32}, {"plan", PURE_FIELD_TEXT}}; + static const I grouped_inputs[] = {{"post", NULL, PURE_KIND_MESSAGE, false, grouped, 3}}; + static const O grouped_code[] = {{FIELD, 1, 0}, {ST, 0, 0}, {FIELD, 0, 0}, {TSET, 1, 0}}; + static const H grouped_handlers[] = {{1, 0, 4}}; + Spec groups = spec; + groups.in = grouped_inputs; groups.o = grouped_code; groups.no = LEN(grouped_code); groups.h = grouped_handlers; + CHECK(load(groups, &module_b) == PURE_OK && !strcmp(module_b.field[0].name, "user.name")); + static const char *const refused_paths[] = {"user..name", ".user", "user.", "user.1st", "user name"}; + for (size_t i = 0; i < LEN(refused_paths); ++i) { + F renamed[3] = {grouped[0], grouped[1], grouped[2]}; + renamed[0].name = refused_paths[i]; + I renamed_inputs[1] = {{"post", NULL, PURE_KIND_MESSAGE, false, renamed, 3}}; + groups.in = renamed_inputs; + CHECK(load(groups, &module_b) == PURE_INVALID && strstr(error, "message field")); + } + F both[3] = {{"user", PURE_FIELD_TEXT}, grouped[1], grouped[2]}; + I both_inputs[1] = {{"post", NULL, PURE_KIND_MESSAGE, false, both, 3}}; + groups.in = both_inputs; + CHECK(load(groups, &module_b) == PURE_INVALID && strstr(error, "field and group")); +} + +/* ---- Connections between apps (docs/research/078-app-connections.md): a + * send is part of its event and is seen once saved; a receiver applies each + * numbered message once, counts a refused one as heard, and forgets what a + * failed save undid. */ +enum { SEND = PURE_OP_SEND }; +typedef struct { uint32_t output; uint64_t seq; unsigned char payload[64]; size_t size; } Sent; +typedef struct { Sent items[16]; size_t count; } Outbox; + +static bool collect_sent(void *context, uint32_t output, uint64_t seq, PureSpan payload) { + Outbox *o = context; + CHECK(o->count < 16 && payload.size <= 64); + Sent *s = &o->items[o->count++]; + *s = (Sent){output, seq, {0}, payload.size}; + memcpy(s->payload, payload.data, payload.size); + return true; +} + +static Outbox outbox_of(const PureApp *app) { + Outbox o = {.count = 0}; + pure_app_outbox(app, collect_sent, &o); + return o; +} + +/* buy/fail {item: text, count: u32}: the count at 0, then the item. */ +static PureResult buy(PureApp *app, uint32_t input, const char *item, uint32_t count) { + unsigned char payload[64]; + size_t length = strlen(item); + memcpy(payload, &count, 4); + memcpy(payload + 4, item, length); + PureResult result = pure_app_message(app, input, NULL, -1, (PureSpan){payload, 4 + length}); + pure_app_finish(app); + return result; +} + +/* order {item: text, count: u32, total: number}: count, total, then item. */ +static PureResult deliver(PureApp *app, const char *source, uint64_t seq, const char *item, uint32_t count) { + unsigned char payload[64]; + size_t length = strlen(item); + double total = 0; + memcpy(payload, &count, 4); + memcpy(payload + 4, &total, 8); + memcpy(payload + 12, item, length); + PureResult result = pure_app_deliver(app, 0, source, seq, (PureSpan){payload, 12 + length}, NULL); + pure_app_finish(app); + return result; +} + +static void links(void) { + static const S sender_nums[] = {{"n", 0}}; + static const F order_fields[] = {{"item", PURE_FIELD_TEXT}, {"count", PURE_FIELD_U32}}; + static const F ordered_fields[] = {{"item", PURE_FIELD_TEXT}, {"count", PURE_FIELD_U32}, {"total", PURE_FIELD_NUMBER}}; + static const I sender_inputs[] = {{"buy", NULL, PURE_KIND_MESSAGE, false, order_fields, 2}, + {"fail", NULL, PURE_KIND_MESSAGE, false, order_fields, 2}, + {"ordered", NULL, PURE_KIND_OUTPUT, false, ordered_fields, 3}}; + static const O sender_code[] = {{L, 0, 0}, {C, 0, 1}, {ADD, 0, 0}, {ST, 0, 0}, {FIELD, 0, 0}, {FIELD, 1, 0}, + {L, 0, 0}, {SEND, 2, 0}, /* buy */ + {FIELD, 0, 0}, {FIELD, 1, 0}, {C, 0, 0}, {SEND, 2, 0}, {C, 0, 0}, {REQ, 0, 0}}; /* fail */ + static const H sender_handlers[] = {{1, 0, 8}, {3, 8, 6}}; + Spec sender = {sender_nums, 1, sender_inputs, 3, NULL, 0, sender_handlers, 2, sender_code, LEN(sender_code), + NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0}; + static const S receiver_nums[] = {{"stock", 0}}; + static const T receiver_texts[] = {{"last", 1, 0}}; + static const char *const receiver_constants[] = {""}; + static const I receiver_inputs[] = {{"order", NULL, PURE_KIND_MESSAGE, false, ordered_fields, 3}}; + static const O receiver_code[] = {{FIELD, 1, 0}, {L, 0, 0}, {ADD, 0, 0}, {ST, 0, 0}, {FIELD, 0, 0}, {TSET, 1, 0}, + {FIELD, 1, 0}, {C, 0, 100}, {LT, 0, 0}, {REQ, 0, 0}}; /* refuses 100 or more */ + static const H receiver_handlers[] = {{1, 0, 10}}; + Spec receiver = {receiver_nums, 1, receiver_inputs, 1, NULL, 0, receiver_handlers, 1, receiver_code, + LEN(receiver_code), NULL, 0, receiver_texts, 1, receiver_constants, 1, NULL, 0, NULL, 0, NULL, 0}; + if (load(sender, &module_a) != PURE_OK || load(receiver, &module_b) != PURE_OK) { fprintf(stderr, "%s\n", error); abort(); } + CHECK(module_a.input[2].prefix == 12); + + /* In memory: a send is its event's; the receiver applies it once per source. */ + PureApp a, b; + CHECK(pure_app_start(&a, &module_a, (PureData){0}) == PURE_OK && pure_app_start(&b, &module_b, (PureData){0}) == PURE_OK); + CHECK(buy(&a, 0, "pen", 2) == PURE_OK && buy(&a, 1, "ink", 3) == PURE_LIMIT); + Outbox o = outbox_of(&a); + CHECK(o.count == 1 && o.items[0].output == 2 && o.items[0].seq == 1 && o.items[0].size == 15 && a.values[0] == 1); + PureSpan sent = {o.items[0].payload, o.items[0].size}; + CHECK(pure_app_deliver(&b, 0, "orders.ordered", 1, sent, NULL) == PURE_OK && !b.duplicate && b.values[0] == 2 && + !strcmp(state_text(&b, 1), "pen")); + pure_app_finish(&b); + CHECK(pure_app_deliver(&b, 0, "orders.ordered", 1, sent, NULL) == PURE_OK && b.duplicate && b.values[0] == 2); + CHECK(deliver(&b, "other", 1, "cup", 5) == PURE_OK && !b.duplicate && b.values[0] == 7); + CHECK(deliver(&b, "orders.ordered", 3, "hat", 1) == PURE_OK && b.values[0] == 8); /* numbers may skip */ + CHECK(deliver(&b, "orders.ordered", 2, "old", 1) == PURE_OK && b.duplicate && b.values[0] == 8); + /* Refused (count 100): delivered all the same, never applied again. */ + CHECK(deliver(&b, "other", 2, "big", 100) == PURE_LIMIT && b.values[0] == 7 + 1); + CHECK(deliver(&b, "other", 2, "big", 1) == PURE_OK && b.duplicate && b.values[0] == 8); + /* Bad deliveries change nothing. */ + CHECK(deliver(&b, "", 4, "x", 1) == PURE_INVALID && deliver(&b, "a b", 4, "x", 1) == PURE_INVALID); + CHECK(deliver(&b, "other", 0, "x", 1) == PURE_INVALID && pure_app_deliver(&a, 2, "s", 1, sent, NULL) == PURE_INVALID); + CHECK(pure_app_message(&a, 2, NULL, -1, sent) == PURE_INVALID); + /* Trimmed, a send is gone at once for the host and from the store at the next save. */ + pure_app_trim(&a, 2, 1); + CHECK(outbox_of(&a).count == 0 && pure_app_save(&a) == PURE_OK && a.sent_count == 0); + CHECK(buy(&a, 0, "cap", 1) == PURE_OK && outbox_of(&a).items[0].seq == 2); + pure_app_stop(&a); + pure_app_stop(&b); + + /* Stored: sends and heard numbers survive restarts; a deferred burst's sends + * appear with its save, and a failed save takes them and their numbers back. */ + char path_a[64], path_b[64]; + snprintf(path_a, sizeof(path_a), "%s", new_store()); + snprintf(path_b, sizeof(path_b), "%s", new_store()); + CHECK(pure_app_start(&a, &module_a, pure_tree_data(path_a)) == PURE_OK); + CHECK(pure_app_start(&b, &module_b, pure_tree_data(path_b)) == PURE_OK); + CHECK(buy(&a, 0, "pen", 2) == PURE_OK && buy(&a, 0, "ink", 3) == PURE_OK); + pure_app_stop(&a); + CHECK(pure_app_start(&a, &module_a, pure_tree_data(path_a)) == PURE_OK); + o = outbox_of(&a); + CHECK(o.count == 2 && o.items[0].seq == 1 && o.items[1].seq == 2 && a.values[0] == 2); + CHECK(pure_app_defer(&a, true)); + for (int i = 0; i < 3; ++i) CHECK(buy(&a, 0, "box", 1) == PURE_OK); + CHECK(outbox_of(&a).count == 2 && pure_app_save(&a) == PURE_OK); + o = outbox_of(&a); + CHECK(o.count == 5 && o.items[4].seq == 5); + CHECK(buy(&a, 0, "lost", 1) == PURE_OK); + pure_app_trim(&a, 2, 3); + fail_stage = PURE_AFTER_HEADER; + CHECK(pure_app_save(&a) == PURE_STORE_ERROR); + fail_stage = -1; + o = outbox_of(&a); + CHECK(o.count == 5 && o.items[0].seq == 1 && a.values[0] == 5); /* the trim and the send undone */ + CHECK(buy(&a, 0, "next", 1) == PURE_OK && pure_app_save(&a) == PURE_OK); + o = outbox_of(&a); + CHECK(o.count == 6 && o.items[5].seq == 6); /* numbered on from 5 */ + pure_app_trim(&a, 2, 4); + CHECK(pure_app_save(&a) == PURE_OK); + pure_app_stop(&a); + CHECK(pure_app_start(&a, &module_a, pure_tree_data(path_a)) == PURE_OK); + o = outbox_of(&a); + CHECK(o.count == 2 && o.items[0].seq == 5 && o.items[1].seq == 6); + /* The receiver: heard numbers stay heard after a restart; a refused one too. */ + CHECK(deliver(&b, "orders.ordered", 1, "pen", 2) == PURE_OK && deliver(&b, "x", 1, "big", 100) == PURE_LIMIT); + pure_app_stop(&b); + CHECK(pure_app_start(&b, &module_b, pure_tree_data(path_b)) == PURE_OK && b.values[0] == 2); + CHECK(deliver(&b, "orders.ordered", 1, "pen", 2) == PURE_OK && b.duplicate && b.values[0] == 2); + CHECK(deliver(&b, "x", 1, "big", 1) == PURE_OK && b.duplicate); + /* A save that fails forgets what it heard. */ + CHECK(pure_app_defer(&b, true) && deliver(&b, "orders.ordered", 2, "ink", 3) == PURE_OK && b.values[0] == 5); + fail_stage = PURE_AFTER_HEADER; + CHECK(pure_app_save(&b) == PURE_STORE_ERROR && b.values[0] == 2); + fail_stage = -1; + CHECK(deliver(&b, "orders.ordered", 2, "ink", 3) == PURE_OK && !b.duplicate && b.values[0] == 5); + CHECK(pure_app_save(&b) == PURE_OK); + pure_app_stop(&b); + + /* Replacing: a module without the output is refused while sends are left + * on it; once they are trimmed it replaces, and the output's number is + * kept for a module that has it again. */ + static const I plain_inputs[] = {{"buy", NULL, PURE_KIND_MESSAGE, false, order_fields, 2}}; + static const O plain_code[] = {{L, 0, 0}, {C, 0, 1}, {ADD, 0, 0}, {ST, 0, 0}}; + static const H plain_handlers[] = {{1, 0, 4}}; + Spec plain = {sender_nums, 1, plain_inputs, 1, NULL, 0, plain_handlers, 1, plain_code, LEN(plain_code), + NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0}; + CHECK(load(plain, &module_b) == PURE_OK); + CHECK(pure_app_replace(&a, &module_b) == PURE_CONFLICT && a.module == &module_a); + pure_app_trim(&a, 2, 6); + CHECK(pure_app_save(&a) == PURE_OK && pure_app_replace(&a, &module_b) == PURE_OK); + CHECK(buy(&a, 0, "plain", 1) == PURE_OK && pure_app_save(&a) == PURE_OK); + pure_app_stop(&a); + CHECK(pure_app_start(&a, &module_b, pure_tree_data(path_a)) == PURE_OK); /* the number kept in the store */ + CHECK(pure_app_replace(&a, &module_a) == PURE_OK && buy(&a, 0, "back", 1) == PURE_OK && pure_app_save(&a) == PURE_OK); + o = outbox_of(&a); + CHECK(o.count == 1 && o.items[0].seq == 7); + /* A stored send whose output the module lacks refuses the start. */ + pure_app_stop(&a); + CHECK(pure_app_start(&a, &module_b, pure_tree_data(path_a)) == PURE_CONFLICT); + remove_store(path_a); + remove_store(path_b); + + /* A process that dies at each commit stage leaves an event and its send + * together or neither, and a delivery and its effect together or neither. */ + snprintf(path_a, sizeof(path_a), "%s", new_store()); + snprintf(path_b, sizeof(path_b), "%s", new_store()); + CHECK(load(receiver, &module_b) == PURE_OK); + uint64_t heard = 0; + size_t kept[2] = {0, 0}; /* sends and deliveries a death left in place */ + for (int round = 0; round < 2; ++round) + for (int stage = PURE_AFTER_HEADER; stage <= PURE_BEFORE_DIR_SYNC; ++stage) { + pid_t child = fork(); + CHECK(child >= 0); + if (!child) { + PureApp doomed, taker; + if (pure_app_start(&doomed, &module_a, pure_tree_data(path_a)) != PURE_OK || + pure_app_start(&taker, &module_b, pure_tree_data(path_b)) != PURE_OK) _exit(1); + crash = 1; + fail_stage = stage; + if (round) buy(&doomed, 0, "crash", 1); + else deliver(&taker, "orders.ordered", heard + 1, "crash", 1); + _exit(0); + } + int status; + CHECK(waitpid(child, &status, 0) == child && WIFEXITED(status) && WEXITSTATUS(status) == 77); + CHECK(pure_app_start(&a, &module_a, pure_tree_data(path_a)) == PURE_OK); + CHECK(pure_app_start(&b, &module_b, pure_tree_data(path_b)) == PURE_OK); + o = outbox_of(&a); + CHECK(o.count == (size_t)a.values[0] && (!o.count || o.items[o.count - 1].seq == o.count)); + heard = b.heard_count ? b.heard[0].seq : 0; + CHECK(b.values[0] == (double)heard); + kept[0] = (size_t)heard; + kept[1] = o.count; + pure_app_stop(&a); + pure_app_stop(&b); + } + CHECK(kept[0] == 1 && kept[1] == 1); /* only a death after the head was written keeps it */ + remove_store(path_a); + remove_store(path_b); + + /* What an output and SEND may not be. */ + const struct { const O *code; size_t count; const char *reason; } refused[] = { + {(const O[]){{FIELD, 1, 0}, {FIELD, 0, 0}, {L, 0, 0}, {SEND, 2, 0}}, 4, "operand type"}, + {(const O[]){{FIELD, 0, 0}, {FIELD, 1, 0}, {L, 0, 0}, {SEND, 1, 0}}, 4, "no such state"}, + {(const O[]){{FIELD, 0, 0}, {FIELD, 1, 0}, {SEND, 2, 0}}, 3, "stack underflow"}, + }; + for (size_t i = 0; i < LEN(refused); ++i) { + Spec bad = sender; + H handler = {1, 0, (uint32_t)refused[i].count}; + bad.o = refused[i].code; bad.no = refused[i].count; bad.h = &handler; bad.nh = 1; + if (load(bad, &module_b) != PURE_INVALID || !strstr(error, refused[i].reason)) { + fprintf(stderr, "links case %zu: expected '%s', got '%s'\n", i, refused[i].reason, error); + abort(); + } + } + H on_output[] = {{1, 0, 8}, {5, 8, 6}}; + Spec bad = sender; + bad.h = on_output; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "handler event")); +} + +/* A timer's tick sees the time the host set; floor and a floored modulo + * take it apart. now is for handlers only. */ +enum { NOW = PURE_OP_NOW, FLOOR = PURE_OP_FLOOR, MOD = PURE_OP_MOD }; +static void timers(void) { + static const S nums[] = {{"clock", 0}, {"seconds", 0}, {"ticks", 0}, {"rest", 0}}; + static const I inputs[] = {TIMER("tick", 1000), KEY("left", "KeyL"), KEY("zero", "KeyZ")}; + static const O code[] = { + {NOW, 0, 0}, {ST, 0, 0}, {NOW, 0, 0}, {C, 0, 1000}, {DIV, 0, 0}, {FLOOR, 0, 0}, {C, 0, 60}, {MOD, 0, 0}, + {ST, 1, 0}, {L, 2, 0}, {C, 0, 1}, {ADD, 0, 0}, {ST, 2, 0}, /* 0 tick */ + {C, 0, -7}, {C, 0, 3}, {MOD, 0, 0}, {C, 0, 7}, {C, 0, -3}, {MOD, 0, 0}, {C, 0, 10}, {MUL, 0, 0}, + {ADD, 0, 0}, {ST, 3, 0}, /* 13 left: 2 + -20 */ + {C, 0, 1}, {C, 0, 0}, {MOD, 0, 0}, {ST, 3, 0}, /* 23 zero */ + }; + static const H handlers[] = {{1, 0, 13}, {3, 13, 10}, {5, 23, 4}}; + static const V one_view[] = {{"v", 0, 1}}; + Spec spec = SPEC(nums, inputs, one_view, handlers, code); + spec.nv = 0; + if (load(spec, &module_a) != PURE_OK) { fprintf(stderr, "%s\n", error); abort(); } + CHECK(module_a.input[0].kind == PURE_KIND_TIMER && module_a.input[0].period == 1000); + PureApp app; + CHECK(pure_app_start(&app, &module_a, (PureData){0}) == PURE_OK); + app.now = 1700000123456.0; + CHECK(pure_app_tick(&app, 0) == PURE_OK && app.values[0] == 1700000123456.0 && + app.values[1] == (double)(1700000123 % 60) && app.values[2] == 1); + CHECK(pure_app_tick(&app, 1) == PURE_INVALID && pure_app_input(&app, 0, PURE_EDGE_DOWN) == PURE_INVALID); + CHECK(pure_app_input(&app, 1, PURE_EDGE_DOWN) == PURE_OK && app.values[3] == 2 - 20); + /* A zero takes the divisor's sign too. */ + static const O zeros[] = {{C, 0, -6}, {C, 0, 3}, {MOD, 0, 0}, {ST, 0, 0}, {C, 0, 6}, {C, 0, -3}, {MOD, 0, 0}, {ST, 1, 0}}; + static const H zero_handler[] = {{3, 0, 8}}; + Spec signs = spec; + signs.o = zeros; signs.no = 8; signs.h = zero_handler; signs.nh = 1; + CHECK(load(signs, &module_b) == PURE_OK); + PureApp zero; + CHECK(pure_app_start(&zero, &module_b, (PureData){0}) == PURE_OK && pure_app_input(&zero, 1, PURE_EDGE_DOWN) == PURE_OK); + CHECK(zero.values[0] == 0 && !signbit(zero.values[0]) && zero.values[1] == 0 && signbit(zero.values[1])); + pure_app_stop(&zero); + CHECK(pure_app_input(&app, 2, PURE_EDGE_DOWN) == PURE_INVALID && app.fault == PURE_FAULT_DIVIDE); + pure_app_stop(&app); + /* A timer's period is 1 ms to a day, and it has nothing else; now is for handlers. */ + static const I no_period[] = {TIMER("tick", 0)}, too_long[] = {TIMER("tick", PURE_TIMER_LONGEST + 1)}; + static const O now_view[] = {{NOW, 0, 0}}; + Spec bad = spec; + bad.in = no_period; bad.ni = 1; bad.nh = 1; bad.o = code; bad.no = 13; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "timer input")); + bad.in = too_long; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "timer input")); + bad = SPEC(nums, inputs, one_view, handlers, now_view); + bad.nh = 0; + CHECK(load(bad, &module_b) == PURE_INVALID && strstr(error, "view with an effect")); +} + +int main(void) { + behaviour(); + faults(); + rejections(); + mutations(); + messages(); + message_fields(); + timers(); + message_mutations(); + texts(); + marks(); + text_mutations(); + lists(); + folds(); + filters(); + keyed(); + keyed_mutations(); + snapshots(); + links(); + fold_mutations(); + pointing(); + list_mutations(); + tables(); + table_mutations(); + stored_states(); + deferred(); + printf("{\"sizeof_module\":%zu,\"sizeof_app\":%zu}\n", sizeof(PureModule), sizeof(PureApp)); + puts("{\"module_tests\":\"verified-load-atomic-events-faults-signed-zero-if-else-replace-by-name-rejections-mutations-messages-documents-typed-verification-text-cursors-utf8-views-rollback-replace-lists-indices-undo-migration-joins-tables-columns-pick-slide-stored-equivalence-crashes-frames-messages-migration-deferred-bursts-pointing-marks-folds-filters-keyed-lists-text-order-message-fields-timers-now-snapshots-links\"}"); + return 0; +} |