Function encode

test/benchmark/base64.c:72–102

}

void encode(int size, const char* str, int* out_size, char** output) {
  *output = (char*) malloc( encode_size(size) );
  char *out = *output;
  const char* ends = str + (size - size % 3);
  uint n;
  while (str != ends) {
    uint32_t n = __builtin_bswap32(*(uint32_t*)str);
    *out++ = chars[(n >> 26) & 63];
    *out++ = chars[(n >> 20) & 63];
    *out++ = chars[(n >> 14) & 63];
    *out++ = chars[(n >> 8) & 63];
    str += 3;
  }
  int pd = size % 3;
  if  (pd == 1) {
    n = (uint)*str << 16;
    *out++ = chars[(n >> 18) & 63];
    *out++ = chars[(n >> 12) & 63];
    *out++ = '=';
    *out++ = '=';
  } else if (pd == 2) {
    n = (uint)*str++ << 16;
    n |= (uint)*str << 8;
    *out++ = chars[(n >> 18) & 63];
    *out++ = chars[(n >> 12) & 63];
    *out++ = chars[(n >> 6) & 63];
    *out++ = '=';
  }
  *out = '\0';
  *out_size = out - *output;
}

int main(int argc, char **argv) {
  int TRIES;