Function strsearch_ioreader

example/plugins/c-api/thread_pool/psi.cc:204–250

------------------------------------------------------------------------- strsearch_ioreader Looks for string pattern in an iobuffer Input: reader reader on a iobuffer pattern string to look for (nul terminated) Output: nparse number of chars scanned, excluding the matching pattern Return Value: STR_SUCCESS if pattern found STR_PARTIAL if pattern found partially

    STR_FAIL    if pattern not found
  -------------------------------------------------------------------------*/
static StrOperationResult
strsearch_ioreader(TSIOBufferReader reader, const char *pattern, int *nparse)
{
  int             index = 0;
  TSIOBufferBlock block = TSIOBufferReaderStart(reader);
  int             slen  = strlen(pattern);

  if (slen <= 0) {
    return STR_FAIL;
  }

  *nparse = 0;

  /* Loop thru each block while we've not yet found the pattern */
  while ((block != nullptr) && (index < slen)) {
    int64_t     blocklen;
    const char *blockptr = TSIOBufferBlockReadStart(block, reader, &blocklen);
    const char *ptr;

    for (ptr = blockptr; ptr < blockptr + blocklen; ptr++) {
      (*nparse)++;
      if (*ptr == pattern[index]) {
        index++;
        if (index == slen) {
          break;
        }
      } else {
        index = 0;
      }
    }

    /* Parse next block */
    block = TSIOBufferBlockNext(block);
  }

  *nparse -= index; /* Adjust nparse so it doesn't include matching chars */
  if (index == slen) {
    Dbg(dbg_ctl, "strfind: match for %s at position %d", pattern, *nparse);
    return STR_SUCCESS;
  } else if (index > 0) {
    Dbg(dbg_ctl, "strfind: partial match for %s at position %d", pattern, *nparse);
    return STR_PARTIAL;
  } else {
    Dbg(dbg_ctl, "strfind no match for %s", pattern);
    return STR_FAIL;
  }
}

/*-------------------------------------------------------------------------
  strextract_ioreader