jsmntok_t.size is 0

[ker2x]

Friendly greetings ! I'm running this code :

static char* tk_to_str(const char* json, jsmntok_t t) {
        char* str = malloc(t.end - t.start + 1);
        if(str == NULL) {
                fprintf(stderr, "tk_to_str : malloc failed\n");
                return NULL;
        }
        str = memcpy(str, json + t.start , t.end - t.start + 1);
        printf("size : %d\n", t.end - t.start);
        str[t.end - t.start] = '\0';
        return str;
}

i have to use "t.end - t.start" because t.size is always 0. am i doing something wrong ? am i mistaken about size ? is it a bug ? thank you

[alisdair]

This repository is not for jsmn itself. This is just my example code for jsmn, which you do not appear to be using. Please direct jsmn questions to the author: http://zserge.com/jsmn.html

To answer your question: t.size is the number of child tokens, not the byte length of the token in the input stream. From the docs:

typedef struct {
    jsmntype_t type; /* Token type */
    int start;       /* Token start position */
    int end;         /* Token end position */
    int size;        /* Number of child (nested) tokens */
} jsmntok_t;

So you are not incorrect about using t.end - t.start.

[ker2x]

Oooops wrong repo, sorry about that and thank you for your instant reply ! Have a nice day \o/