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14.1k
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/* create and change context */
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static bool open_container(struct JsonContext *ctx, enum JsonValueType type, unsigned int extra)
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{
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struct JsonValue *jv;
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jv = mk_value(ctx, type, extra, true);
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if (!jv)
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return false;
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ctx->parent = jv;
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ctx->cur_key = NULL;
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return true;
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}
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/* close and change context */
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static enum ParseState close_container(struct JsonContext *ctx, enum ParseState state)
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{
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struct JsonContainer *c;
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if (state != S_PARENT)
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return (int)err_false(ctx, ""close_container bug"");
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c = get_container(ctx->parent);
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if (!c)
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return (int)err_false(ctx, ""invalid parent"");
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ctx->parent = c->c_parent;
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ctx->cur_key = NULL;
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if (has_type(ctx->parent, JSON_DICT)) {
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return S_DICT_COMMA_OR_CLOSE;
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} else if (has_type(ctx->parent, JSON_LIST)) {
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return S_LIST_COMMA_OR_CLOSE;
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}
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return S_DONE;
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}
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/* parse 4-char token */
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static bool parse_char4(struct JsonContext *ctx, const char **src_p, const char *end,
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uint32_t t_exp, enum JsonValueType type, bool val)
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{
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const char *src;
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uint32_t t_got;
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struct JsonValue *jv;
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src = *src_p;
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if (src + 4 > end)
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return err_false(ctx, ""Unexpected end of token"");
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memcpy(&t_got, src, 4);
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if (t_exp != t_got)
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return err_false(ctx, ""Invalid token"");
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jv = mk_value(ctx, type, 0, true);
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if (!jv)
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return false;
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jv->u.v_bool = val;
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*src_p += 4;
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return true;
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}
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/* parse int or float */
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static bool parse_number(struct JsonContext *ctx, const char **src_p, const char *end)
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{
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const char *start, *src;
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enum JsonValueType type = JSON_INT;
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char *tokend = NULL;
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char buf[NUMBER_BUF];
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size_t len;
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struct JsonValue *jv;
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double v_float = 0;
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int64_t v_int = 0;
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/* scan & copy */
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start = src = *src_p;
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for (; src < end; src++) {
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if (*src >= '0' && *src <= '9') {
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} else if (*src == '+' || *src == '-') {
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} else if (*src == '.' || *src == 'e' || *src == 'E') {
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type = JSON_FLOAT;
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} else {
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break;
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}
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}
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len = src - start;
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if (len >= NUMBER_BUF)
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goto failed;
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memcpy(buf, start, len);
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buf[len] = 0;
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/* now parse */
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errno = 0;
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tokend = buf;
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if (type == JSON_FLOAT) {
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v_float = strtod_dot(buf, &tokend);
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if (*tokend != 0 || errno || !isfinite(v_float))
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goto failed;
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} else if (len < 8) {
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v_int = strtol(buf, &tokend, 10);
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