text: /*
   * count.c
   */
  #include <stdlib.h>
  #include <stdio.h>
  #include <string.h>
  #include "oniguruma.h"
  
  #define ulen(enc, p) onigenc_str_bytelen_null(enc, (UChar* )p)
  
  static int
  test(OnigEncoding enc, OnigMatchParam* mp, char* in_pattern, char* in_str)
  {
    int r;
    unsigned char *start, *range, *end;
    regex_t* reg;
    OnigErrorInfo einfo;
    OnigRegion *region;
    UChar* pattern;
    UChar* str;
  
    pattern = (UChar* )in_pattern;
    str = (UChar* )in_str;
  
    r = onig_new(&reg, pattern, pattern + ulen(enc, pattern),
                 ONIG_OPTION_DEFAULT, enc, ONIG_SYNTAX_DEFAULT, &einfo);
    if (r != ONIG_NORMAL) {
      char s[ONIG_MAX_ERROR_MESSAGE_LEN];
      onig_error_code_to_str((UChar* )s, r, &einfo);
      fprintf(stderr, "COMPILE ERROR: %d: %s\n", r, s);
      return -1;
    }
  
    region = onig_region_new();
  
    end   = str + ulen(enc, str);
    start = str;
    range = end;
    r = onig_search_with_param(reg, str, end, start, range, region,
                               ONIG_OPTION_NONE, mp);
    if (r >= 0) {
      int slot;
      OnigValue val;
      char* tag;
      int tag_len;
  
      fprintf(stdout, "match at %d\n", r);
  
    show_count:
      if (enc == ONIG_ENCODING_UTF16_BE) {
        tag = "\000x\000\000";
      }
      else if (enc == ONIG_ENCODING_UTF16_LE) {
        tag = "x\000\000\000";
      }
      else {
        tag = "x";
      }
      tag_len = ulen(enc, tag);
  
      slot = 0;
      r = onig_get_callout_data_by_tag(reg, mp, (UChar* )tag, (UChar* )tag + tag_len,
                                       slot, 0, &val);
      if (r < ONIG_NORMAL) goto err;
      else if (r > ONIG_NORMAL) {
        fprintf(stdout, "COUNT[x]: NO DATA\n");
      }
      else {
        fprintf(stdout, "COUNT[x]: %ld\n", val.l);
      }
    }
    else if (r == ONIG_MISMATCH) {
      fprintf(stdout, "search fail\n");
      goto show_count;
    }
    else { /* error */
      char s[ONIG_MAX_ERROR_MESSAGE_LEN];
    err:
      onig_error_code_to_str((UChar* )s, r);
      fprintf(stdout, "SEARCH ERROR: %d: %s\n", r, s);
    }
  
    onig_region_free(region, 1 /* 1:free self, 0:free contents only */);
    onig_free(reg);
    return r;
  }
  
  extern int main(int argc, char* argv[])
  {
    int r;
    int id;
    UChar* name;
    OnigMatchParam* mp;
    OnigEncoding encs[3];
    OnigType arg_types[4];
    OnigValue opt_defaults[4];
  
    encs[0] = ONIG_ENCODING_UTF8;
    encs[1] = ONIG_ENCODING_UTF16_BE;
    encs[2] = ONIG_ENCODING_UTF16_LE;
  
    r = onig_initialize(encs, sizeof(encs)/sizeof(encs[0]));
    if (r != ONIG_NORMAL) {
      fprintf(stderr, "FAIL: onig_initialize(): %d\n", r);
      return -1;
    }
  
    mp = onig_new_match_param();
  
    test(encs[0], mp, "abc(.(*COUNT[x]))*(*FAIL)", "abcdefg");
    test(encs[0], mp, "abc(.(*COUNT[_any_]))*(.(*COUNT[x]))*d", "abcdefg");
    /* fail count */
    test(encs[0], mp, "abc(.(*COUNT[x]{<}))*f", "abcdefg");
    /* success count */
    test(encs[0], mp, "abc(.(*COUNT[x]{X}))*f", "abcdefg");
    /* passed count */
    test(encs[0], mp, "abc(.(*COUNT[x]))*f", "abcdefg");
    test(encs[0], mp, "a(.(*COUNT[x]))*z", "abcd\nabcdz");
    /* total count */
    test(encs[0], mp, "a(.(*TOTAL_COUNT[x]))*z", "abcd\nabcdz");
  
    test(encs[1], mp, "\000a\000b\000c\000(\000.\000(\000*\000C\000O\000U\000N\000T\000[\000x\000]\000)\000)\000*\000(\000*\000F\000A\000I\000L\000)\000\000", "\000a\000b\000c\000d\000e\000f\000g\000\000");
  
    test(encs[2], mp, "a\000b\000c\000(\000.\000(\000*\000C\000O\000U\000N\000T\000[\000x\000]\000)\000)\000*\000(\000*\000F\000A\000I\000L\000)\000\000\000", "a\000b\000c\000d\000e\000f\000g\000\000\000");
  
    onig_free_match_param(mp);
    onig_end();
    return 0;
  }
  