A URL string parsing function in C.

querystringparse.c

/*
  Needs strmap http://pokristensson.com/strmap.html
*/
/*
 * Parse the url and store values into the hash table
 * returns the number of values successfully placed into the hashtable
*/
int parseURL(char * url, int urlLength, StrMap * table){
    int i;
    int j;
    int pairCounter;
    char keyBuff[256];
    char valBuff[256];
    bzero(keyBuff,sizeof keyBuff);
    bzero(valBuff,sizeof valBuff);

    if(url == NULL)
        return 0;
    if(table == NULL)
        return -1; /* Err ... */
    pairCounter = 0;
    /* Find ? */
    for(i=0; url[i] != '\0' && i < urlLength; ++i)
        if(url[i] == '?')
            break;
    while(url[i] != '\0' && i < urlLength){
        for(j=0,i++; url[i] != '=' && url[i] != '\0' && i < urlLength; ++i)
            keyBuff[j++] = url[i];
        keyBuff[j] = '\0';
        for(j=0,i++; strlen(keyBuff) > 0 && url[i] != '&' && url[i] != '\0' && i < urlLength; ++i)
            valBuff[j++] = url[i];
        valBuff[j] = '\0';
        fprintf(stderr, "valBuff:%zu, keyBuff:%zu\n", strlen(valBuff), strlen(keyBuff));
        if(strlen(valBuff) > 0 && strlen(keyBuff) > 0){
            /* Place values into table */
            fprintf(stderr, "%s=>%s\n", keyBuff, valBuff);
            if(sm_put(table, keyBuff, valBuff) == 0)
                fprintf(stderr, "Failed to copy parameters into hash table while parsing url\n");
            else
                pairCounter++;
        }
        /* reset the buffers */
        bzero(keyBuff,sizeof keyBuff);
        bzero(valBuff,sizeof valBuff);
        
    }
    return pairCounter;
}