Function url_encode

webrtc/base/stringencode.cc:143–167

};

size_t url_encode(char * buffer, size_t buflen,
                  const char * source, size_t srclen) {
  if (NULL == buffer)
    return srclen * 3 + 1;
  if (buflen <= 0)
    return 0;

  size_t srcpos = 0, bufpos = 0;
  while ((srcpos < srclen) && (bufpos + 1 < buflen)) {
    unsigned char ch = source[srcpos++];
    if ((ch < 128) && (ASCII_CLASS[ch] & URL_UNSAFE)) {
      if (bufpos + 3 >= buflen) {
        break;
      }
      buffer[bufpos+0] = '%';
      buffer[bufpos+1] = hex_encode((ch >> 4) & 0xF);
      buffer[bufpos+2] = hex_encode((ch     ) & 0xF);
      bufpos += 3;
    } else {
      buffer[bufpos++] = ch;
    }
  }
  buffer[bufpos] = '\0';
  return bufpos;
}

size_t url_decode(char * buffer, size_t buflen,
                  const char * source, size_t srclen) {