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@@ -0,0 +1,316 @@
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+#include "jsmn.h"
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+
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+#define JSMN_STRICT
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+
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+/**
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+ * Allocates a fresh unused token from the token pull.
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+ */
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+static jsmntok_t *jsmn_alloc_token(jsmn_parser *parser,
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+ jsmntok_t *tokens, size_t num_tokens) {
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+ jsmntok_t *tok;
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+ if (parser->toknext >= num_tokens) {
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+ return NULL;
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+ }
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+ tok = &tokens[parser->toknext++];
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+ tok->start = tok->end = -1;
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+ tok->size = 0;
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+#ifdef JSMN_PARENT_LINKS
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+ tok->parent = -1;
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+#endif
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+ return tok;
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+}
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+
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+/**
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+ * Fills token type and boundaries.
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+ */
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+static void jsmn_fill_token(jsmntok_t *token, jsmntype_t type,
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+ int start, int end) {
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+ token->type = type;
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+ token->start = start;
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+ token->end = end;
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+ token->size = 0;
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+}
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+
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+/**
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+ * Fills next available token with JSON primitive.
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+ */
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+static int jsmn_parse_primitive(jsmn_parser *parser, const char *js,
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+ size_t len, jsmntok_t *tokens, size_t num_tokens) {
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+ jsmntok_t *token;
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+ int start;
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+
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+ start = (int)parser->pos;
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+
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+ for (; parser->pos < len && js[parser->pos] != '\0'; parser->pos++) {
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+ switch (js[parser->pos]) {
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+#ifndef JSMN_STRICT
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+ /* In strict mode primitive must be followed by "," or "}" or "]" */
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+ case ':':
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+#endif
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+ case '\t' : case '\r' : case '\n' : case ' ' :
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+ case ',' : case ']' : case '}' :
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+ goto found;
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+ }
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+ if (js[parser->pos] < 32 || js[parser->pos] >= 127) {
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+ parser->pos = (unsigned int)start;
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+ return JSMN_ERROR_INVAL;
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+ }
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+ }
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+#ifdef JSMN_STRICT
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+ /* In strict mode primitive must be followed by a comma/object/array */
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+ parser->pos = (unsigned int)start;
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+ return JSMN_ERROR_PART;
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+#endif
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+
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+found:
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+ if (tokens == NULL) {
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+ parser->pos--;
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+ return 0;
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+ }
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+ token = jsmn_alloc_token(parser, tokens, num_tokens);
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+ if (token == NULL) {
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+ parser->pos = (unsigned int)start;
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+ return JSMN_ERROR_NOMEM;
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+ }
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+ jsmn_fill_token(token, JSMN_PRIMITIVE, start, (int)parser->pos);
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+#ifdef JSMN_PARENT_LINKS
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+ token->parent = parser->toksuper;
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+#endif
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+ parser->pos--;
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+ return 0;
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+}
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+
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+/**
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+ * Fills next token with JSON string.
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+ */
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+static int jsmn_parse_string(jsmn_parser *parser, const char *js,
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+ size_t len, jsmntok_t *tokens, size_t num_tokens) {
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+ jsmntok_t *token;
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+
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+ unsigned int start = parser->pos;
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+
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+ parser->pos++;
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+
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+ /* Skip starting quote */
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+ for (; parser->pos < len && js[parser->pos] != '\0'; parser->pos++) {
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+ char c = js[parser->pos];
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+
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+ /* Quote: end of string */
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+ if (c == '\"') {
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+ if (tokens == NULL) {
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+ return 0;
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+ }
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+ token = jsmn_alloc_token(parser, tokens, num_tokens);
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+ if (token == NULL) {
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+ parser->pos = start;
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+ return JSMN_ERROR_NOMEM;
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+ }
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+ jsmn_fill_token(token, JSMN_STRING, (int)(start+1), (int)parser->pos);
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+#ifdef JSMN_PARENT_LINKS
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+ token->parent = parser->toksuper;
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+#endif
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+ return 0;
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+ }
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+
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+ /* Backslash: Quoted symbol expected */
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+ if (c == '\\' && parser->pos + 1 < len) {
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+ int i;
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+ parser->pos++;
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+ switch (js[parser->pos]) {
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+ /* Allowed escaped symbols */
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+ case '\"': case '/' : case '\\' : case 'b' :
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+ case 'f' : case 'r' : case 'n' : case 't' :
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+ break;
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+ /* Allows escaped symbol \uXXXX */
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+ case 'u':
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+ parser->pos++;
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+ for(i = 0; i < 4 && parser->pos < len && js[parser->pos] != '\0'; i++) {
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+ /* If it isn't a hex character we have an error */
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+ if(!((js[parser->pos] >= 48 && js[parser->pos] <= 57) || /* 0-9 */
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+ (js[parser->pos] >= 65 && js[parser->pos] <= 70) || /* A-F */
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+ (js[parser->pos] >= 97 && js[parser->pos] <= 102))) { /* a-f */
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+ parser->pos = start;
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+ return JSMN_ERROR_INVAL;
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+ }
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+ parser->pos++;
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+ }
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+ parser->pos--;
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+ break;
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+ /* Unexpected symbol */
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+ default:
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+ parser->pos = start;
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+ return JSMN_ERROR_INVAL;
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+ }
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+ }
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+ }
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+ parser->pos = start;
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+ return JSMN_ERROR_PART;
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+}
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+
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+/**
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+ * Parse JSON string and fill tokens.
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+ */
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+int jsmn_parse(jsmn_parser *parser, const char *js, size_t len,
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+ jsmntok_t *tokens, unsigned int num_tokens) {
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+ int r;
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+ int i;
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+ jsmntok_t *token;
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+ unsigned int count = parser->toknext;
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+
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+ for (; parser->pos < len && js[parser->pos] != '\0'; parser->pos++) {
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+ char c;
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+ jsmntype_t type;
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+
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+ c = js[parser->pos];
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+ switch (c) {
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+ case '{': case '[':
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+ count++;
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+ if (tokens == NULL) {
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+ break;
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+ }
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+ token = jsmn_alloc_token(parser, tokens, num_tokens);
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+ if (token == NULL)
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+ return JSMN_ERROR_NOMEM;
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+ if (parser->toksuper != -1) {
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+ tokens[parser->toksuper].size++;
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+#ifdef JSMN_PARENT_LINKS
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+ token->parent = parser->toksuper;
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+#endif
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+ }
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+ token->type = (c == '{' ? JSMN_OBJECT : JSMN_ARRAY);
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+ token->start = (int)parser->pos;
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+ parser->toksuper = (int)parser->toknext - 1;
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+ break;
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+ case '}': case ']':
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+ if (tokens == NULL)
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+ break;
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+ type = (c == '}' ? JSMN_OBJECT : JSMN_ARRAY);
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+#ifdef JSMN_PARENT_LINKS
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+ if (parser->toknext < 1) {
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+ return JSMN_ERROR_INVAL;
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+ }
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+ token = &tokens[parser->toknext - 1];
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+ for (;;) {
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+ if (token->start != -1 && token->end == -1) {
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+ if (token->type != type) {
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+ return JSMN_ERROR_INVAL;
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+ }
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+ token->end = parser->pos + 1;
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+ parser->toksuper = token->parent;
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+ break;
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+ }
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+ if (token->parent == -1) {
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+ if(token->type != type || parser->toksuper == -1) {
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+ return JSMN_ERROR_INVAL;
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+ }
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+ break;
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+ }
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+ token = &tokens[token->parent];
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+ }
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+#else
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+ for (i = (int)parser->toknext - 1; i >= 0; i--) {
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+ token = &tokens[i];
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+ if (token->start != -1 && token->end == -1) {
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+ if (token->type != type) {
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+ return JSMN_ERROR_INVAL;
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+ }
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+ parser->toksuper = -1;
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+ token->end = (int)parser->pos + 1;
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+ break;
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+ }
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+ }
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+ /* Error if unmatched closing bracket */
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+ if (i == -1) return JSMN_ERROR_INVAL;
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+ for (; i >= 0; i--) {
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+ token = &tokens[i];
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+ if (token->start != -1 && token->end == -1) {
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+ parser->toksuper = i;
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+ break;
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+ }
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+ }
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+#endif
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+ break;
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+ case '\"':
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+ r = jsmn_parse_string(parser, js, len, tokens, num_tokens);
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+ if (r < 0) return r;
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+ count++;
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+ if (parser->toksuper != -1 && tokens != NULL)
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+ tokens[parser->toksuper].size++;
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+ break;
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+ case '\t' : case '\r' : case '\n' : case ' ':
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+ break;
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+ case ':':
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+ parser->toksuper = (int)parser->toknext - 1;
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+ break;
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+ case ',':
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+ if (tokens != NULL && parser->toksuper != -1 &&
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+ tokens[parser->toksuper].type != JSMN_ARRAY &&
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+ tokens[parser->toksuper].type != JSMN_OBJECT) {
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+#ifdef JSMN_PARENT_LINKS
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+ parser->toksuper = tokens[parser->toksuper].parent;
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+#else
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+ for (i = (int)parser->toknext - 1; i >= 0; i--) {
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+ if (tokens[i].type == JSMN_ARRAY || tokens[i].type == JSMN_OBJECT) {
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+ if (tokens[i].start != -1 && tokens[i].end == -1) {
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+ parser->toksuper = i;
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+ break;
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+ }
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+ }
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+ }
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+#endif
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+ }
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+ break;
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+#ifdef JSMN_STRICT
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+ /* In strict mode primitives are: numbers and booleans */
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+ case '-': case '0': case '1' : case '2': case '3' : case '4':
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+ case '5': case '6': case '7' : case '8': case '9':
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+ case 't': case 'f': case 'n' :
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+ /* And they must not be keys of the object */
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+ if (tokens != NULL && parser->toksuper != -1) {
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+ jsmntok_t *t = &tokens[parser->toksuper];
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+ if (t->type == JSMN_OBJECT ||
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+ (t->type == JSMN_STRING && t->size != 0)) {
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+ return JSMN_ERROR_INVAL;
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+ }
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+ }
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+#else
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+ /* In non-strict mode every unquoted value is a primitive */
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+ default:
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+#endif
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+ r = jsmn_parse_primitive(parser, js, len, tokens, num_tokens);
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+ if (r < 0) return r;
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+ count++;
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+ if (parser->toksuper != -1 && tokens != NULL)
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+ tokens[parser->toksuper].size++;
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+ break;
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+
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+#ifdef JSMN_STRICT
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+ /* Unexpected char in strict mode */
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+ default:
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+ return JSMN_ERROR_INVAL;
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+#endif
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+ }
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+ }
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+
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+ if (tokens != NULL) {
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+ for (i = (int)parser->toknext - 1; i >= 0; i--) {
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+ /* Unmatched opened object or array */
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+ if (tokens[i].start != -1 && tokens[i].end == -1) {
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+ return JSMN_ERROR_PART;
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+ }
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+ }
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+ }
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+
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+ return (int)count;
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+}
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+
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+/**
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+ * Creates a new parser based over a given buffer with an array of tokens
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+ * available.
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+ */
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+void jsmn_init(jsmn_parser *parser) {
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+ parser->pos = 0;
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+ parser->toknext = 0;
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+ parser->toksuper = -1;
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+}
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+
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