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-rw-r--r--prototypes/connections/message-json.c281
1 files changed, 0 insertions, 281 deletions
diff --git a/prototypes/connections/message-json.c b/prototypes/connections/message-json.c
deleted file mode 100644
index 66c812d..0000000
--- a/prototypes/connections/message-json.c
+++ /dev/null
@@ -1,281 +0,0 @@
-#include "message-json.h"
-#include "module-text.h"
-#include <math.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-static void write_u32(unsigned char *p, uint32_t v) { for (unsigned i = 0; i < 4; ++i) p[i] = (unsigned char)(v >> (8 * i)); }
-
-static bool decimal(const char *text, uint64_t maximum, uint64_t *value) {
- if (!*text) return false;
- uint64_t n = 0;
- for (; *text; ++text) {
- if (*text < '0' || *text > '9') return false;
- unsigned digit = (unsigned)(*text - '0');
- if (n > (maximum - digit) / 10) return false;
- n = n * 10 + digit;
- }
- *value = n;
- return true;
-}
-
-/* A JSON number's text: -?(0|[1-9][0-9]*)(.[0-9]+)?([eE][+-]?[0-9]+)?, its
- * length (0 if there is none). An integer has neither part after it. */
-static size_t json_number(const unsigned char *p, size_t size, bool *integer) {
- size_t i = 0;
- *integer = true;
- if (i < size && p[i] == '-') ++i;
- if (i == size || p[i] < '0' || p[i] > '9') return 0;
- if (p[i++] != '0') while (i < size && p[i] >= '0' && p[i] <= '9') ++i;
- if (i < size && p[i] == '.') {
- *integer = false;
- if (++i == size || p[i] < '0' || p[i] > '9') return 0;
- while (i < size && p[i] >= '0' && p[i] <= '9') ++i;
- }
- if (i < size && (p[i] == 'e' || p[i] == 'E')) {
- *integer = false;
- if (++i < size && (p[i] == '+' || p[i] == '-')) ++i;
- if (i == size || p[i] < '0' || p[i] > '9') return 0;
- while (i < size && p[i] >= '0' && p[i] <= '9') ++i;
- }
- return i;
-}
-
-/* A fixed field's value from its text (a query value or a JSON number) into
- * the prefix: a u32 in range, or a finite number. */
-bool pure_json_fixed(const PureField *field, const unsigned char *text, size_t size, unsigned char *prefix) {
- bool integer;
- if (!size || json_number(text, size, &integer) != size || size > 40) return false;
- char digits[48];
- memcpy(digits, text, size);
- digits[size] = 0;
- if (field->type == PURE_FIELD_U32) {
- uint64_t n;
- if (!integer || !decimal(digits, UINT32_MAX, &n)) return false;
- write_u32(prefix + field->offset, (uint32_t)n);
- return true;
- }
- double value = strtod(digits, NULL);
- if (!isfinite(value)) return false;
- memcpy(prefix + field->offset, &value, 8);
- return true;
-}
-
-/* A JSON string's contents (after its opening quote) up to the closing one:
- * its length, or 0 when it does not close or holds a control byte. */
-static size_t json_string_end(const unsigned char *p, size_t size) {
- for (size_t i = 0; i < size; ++i) {
- /* Eight bytes at a time while none is a quote, a backslash or a control byte. */
- const uint64_t ones = UINT64_C(0x0101010101010101), highs = UINT64_C(0x8080808080808080);
- for (uint64_t w, q, s; size - i >= 8; i += 8) {
- memcpy(&w, p + i, 8);
- q = w ^ (ones * '"');
- s = w ^ (ones * '\\');
- if (((q - ones) & ~q & highs) | ((s - ones) & ~s & highs) | ((w - ones * 0x20) & ~w & highs)) break;
- }
- if (i == size) break;
- if (p[i] == '"') return i + 1;
- if (p[i] < 0x20) return 0;
- if (p[i] == '\\' && ++i == size) return 0;
- }
- return 0;
-}
-
-static int hex_digit(unsigned char c) {
- return c >= '0' && c <= '9' ? c - '0' : c >= 'a' && c <= 'f' ? c - 'a' + 10 : c >= 'A' && c <= 'F' ? c - 'A' + 10 : -1;
-}
-
-static bool json_code(const unsigned char *p, size_t left, uint32_t *code) {
- if (left < 4) return false;
- *code = 0;
- for (int i = 0; i < 4; ++i) {
- int d = hex_digit(p[i]);
- if (d < 0) return false;
- *code = *code << 4 | (uint32_t)d;
- }
- return true;
-}
-
-/* Unescape a JSON string's contents into out (never longer); false for a
- * bad escape or a lone surrogate. The result is checked as UTF-8 after. */
-static bool json_unescape(const unsigned char *in, size_t size, unsigned char *out, size_t *written) {
- size_t o = 0;
- for (size_t i = 0; i < size;) {
- unsigned char b = in[i++];
- if (b != '\\') { out[o++] = b; continue; }
- if (i == size) return false;
- b = in[i++];
- const char *plain = strchr("\"\\/bfnrt", b);
- if (b && plain) { out[o++] = (unsigned char)"\"\\/\b\f\n\r\t"[plain - "\"\\/bfnrt"]; continue; }
- uint32_t code, low;
- if (b != 'u' || !json_code(in + i, size - i, &code)) return false;
- i += 4;
- if (code >= 0xDC00 && code <= 0xDFFF) return false;
- if (code >= 0xD800 && code <= 0xDBFF) {
- if (size - i < 6 || in[i] != '\\' || in[i + 1] != 'u' || !json_code(in + i + 2, size - i - 2, &low) ||
- low < 0xDC00 || low > 0xDFFF) return false;
- i += 6;
- code = 0x10000 + ((code - 0xD800) << 10) + (low - 0xDC00);
- }
- if (code < 0x80) out[o++] = (unsigned char)code;
- else if (code < 0x800) { out[o++] = (unsigned char)(0xC0 | code >> 6); out[o++] = (unsigned char)(0x80 | (code & 0x3F)); }
- else if (code < 0x10000) {
- out[o++] = (unsigned char)(0xE0 | code >> 12);
- out[o++] = (unsigned char)(0x80 | (code >> 6 & 0x3F));
- out[o++] = (unsigned char)(0x80 | (code & 0x3F));
- } else {
- out[o++] = (unsigned char)(0xF0 | code >> 18);
- out[o++] = (unsigned char)(0x80 | (code >> 12 & 0x3F));
- out[o++] = (unsigned char)(0x80 | (code >> 6 & 0x3F));
- out[o++] = (unsigned char)(0x80 | (code & 0x3F));
- }
- }
- *written = o;
- return true;
-}
-
-size_t pure_json_space(const unsigned char *p, size_t at, size_t size) {
- while (at < size && (p[at] == ' ' || p[at] == '\t' || p[at] == '\n' || p[at] == '\r')) ++at;
- return at;
-}
-
-/* Skip any JSON value at json[*at] (at most 64 deep): a member of an
- * answer that names no field. */
-static bool skip_value(const unsigned char *json, size_t size, size_t *at, unsigned depth) {
- if (*at == size || depth > 64) return false;
- unsigned char b = json[*at];
- bool integer;
- if (b == '"') {
- size_t end = json_string_end(json + *at + 1, size - *at - 1);
- if (!end) return false;
- *at += 1 + end;
- return true;
- }
- if (b == '{' || b == '[') {
- unsigned char close = b == '{' ? '}' : ']';
- *at = pure_json_space(json, *at + 1, size);
- for (bool first = true; *at < size && json[*at] != close; first = false) {
- if (!first) {
- if (json[(*at)++] != ',') return false;
- *at = pure_json_space(json, *at, size);
- }
- if (close == '}') {
- size_t key_end = *at < size && json[*at] == '"' ? json_string_end(json + *at + 1, size - *at - 1) : 0;
- if (!key_end) return false;
- *at = pure_json_space(json, *at + 1 + key_end, size);
- if (*at == size || json[(*at)++] != ':') return false;
- *at = pure_json_space(json, *at, size);
- }
- if (!skip_value(json, size, at, depth + 1)) return false;
- *at = pure_json_space(json, *at, size);
- }
- if (*at == size) return false;
- ++*at;
- return true;
- }
- static const char *const words[] = {"true", "false", "null"};
- for (size_t w = 0; w < 3; ++w)
- if (size - *at >= strlen(words[w]) && !memcmp(json + *at, words[w], strlen(words[w]))) {
- *at += strlen(words[w]);
- return true;
- }
- size_t length = json_number(json + *at, size - *at, &integer);
- *at += length;
- return length > 0;
-}
-
-/* The field named path.key (key alone at the top), or the field count when
- * none is; group says whether fields are named inside it instead. */
-static uint32_t field_named(const PureJsonMessage *b, const char *path, size_t path_size, const unsigned char *key,
- size_t key_size, bool *group) {
- const PureModule *m = b->module;
- size_t size = path_size + !!path_size + key_size;
- *group = false;
- for (uint32_t f = 0; f < b->shape->field_count; ++f) {
- const char *name = m->field[b->shape->field_start + f].name;
- size_t length = strlen(name);
- if (length < size || memcmp(name, path, path_size) || (path_size && name[path_size] != '.') ||
- memcmp(name + path_size + !!path_size, key, key_size)) continue;
- if (length == size) return f;
- if (name[size] == '.') *group = true;
- }
- return b->shape->field_count;
-}
-
-/* An object's members from json[*at] (its opening brace), in the group named
- * path: a field's value, or a group's object. Strings stay where they are
- * (an escaped one is unescaped over itself, which never makes it longer).
- * NULL, or the error to answer. */
-static const char *members(PureJsonMessage *b, unsigned char *json, size_t size, size_t *at, const char *path, size_t path_size,
- unsigned depth) {
- const PureModule *m = b->module;
- if (*at == size || json[(*at)++] != '{') return "json";
- *at = pure_json_space(json, *at, size);
- for (bool first = true; *at < size && json[*at] != '}'; first = false) {
- if (!first) {
- if (json[(*at)++] != ',') return "json";
- *at = pure_json_space(json, *at, size);
- }
- size_t key_end = *at < size && json[*at] == '"' ? json_string_end(json + *at + 1, size - *at - 1) : 0;
- if (!key_end) return "json";
- const unsigned char *key = json + *at + 1;
- size_t key_size = key_end - 1;
- *at = pure_json_space(json, *at + 1 + key_end, size);
- if (*at == size || json[(*at)++] != ':') return "json";
- *at = pure_json_space(json, *at, size);
- bool group;
- uint32_t f = field_named(b, path, path_size, key, key_size, &group);
- if (f == b->shape->field_count && !group && b->lenient) { /* not the app's: skipped */
- if (!skip_value(json, size, at, depth)) return "json";
- *at = pure_json_space(json, *at, size);
- continue;
- }
- if (*at < size && json[*at] == '{') {
- if (!group) return f < b->shape->field_count ? "json_type" : "json_field";
- char inner[PURE_MODULE_NAME];
- size_t inner_size = path_size + !!path_size + key_size;
- memcpy(inner, path, path_size);
- if (path_size) inner[path_size] = '.';
- memcpy(inner + path_size + !!path_size, key, key_size);
- const char *why = members(b, json, size, at, inner, inner_size, depth + 1);
- if (why) return why;
- *at = pure_json_space(json, *at, size);
- continue;
- }
- if (f == b->shape->field_count) return group ? "json_type" : "json_field";
- if (b->seen[f] || (b->given && b->given[f])) return "json_field";
- b->seen[f] = true;
- const PureField *field = &m->field[b->shape->field_start + f];
- bool variable = field->type == PURE_FIELD_BYTES || field->type == PURE_FIELD_TEXT, integer;
- if (*at < size && json[*at] == '"') {
- size_t end = json_string_end(json + *at + 1, size - *at - 1), written;
- if (!end) return "json";
- if (!variable) return "json_type";
- unsigned char *value = json + *at + 1;
- if (!memchr(value, '\\', end - 1)) written = end - 1;
- else if (!json_unescape(value, end - 1, value, &written)) return "json";
- if (field->type == PURE_FIELD_TEXT && !pure_utf8_valid((PureSpan){value, written})) return "json";
- write_u32(b->table + 8 * f, (uint32_t)(value - b->payload));
- write_u32(b->table + 8 * f + 4, (uint32_t)written);
- *at = pure_json_space(json, *at + 1 + end, size);
- continue;
- }
- size_t length = json_number(json + *at, size - *at, &integer);
- if (!length) {
- static const char *const words[] = {"true", "false", "null"};
- for (size_t w = 0; w < 3 && !length; ++w)
- if (size - *at >= strlen(words[w]) && !memcmp(json + *at, words[w], strlen(words[w]))) return "json_type";
- return *at < size && json[*at] == '[' ? "json_type" : "json";
- }
- if (variable || !pure_json_fixed(field, json + *at, length, b->payload)) return "json_type";
- *at = pure_json_space(json, *at + length, size);
- }
- if (*at == size) return "json";
- ++*at;
- return NULL;
-}
-
-const char *pure_json_message(PureJsonMessage *message, unsigned char *json, size_t size, size_t *at) {
- return members(message, json, size, at, "", 0, 0);
-}
generated by cgit v1.2.3 (git 2.46.0) at 2026-10-20 17:10:41 +0000