/*
 * sql.c
 */
#include <stdio.h>
#include "oniguruma.h"

extern int main(int argc, char* argv[])
{
  static OnigSyntaxType SQLSyntax;

  int r;
  unsigned char *start, *range, *end;
  regex_t* reg;
  OnigErrorInfo einfo;
  OnigRegion *region;

  static unsigned char* pattern = "\\_%\\\\__zz";
  static unsigned char* str = "a_abcabcabc\\ppzz";

  onig_set_syntax_op      (&SQLSyntax, ONIG_SYN_OP_VARIABLE_META_CHARACTERS);
  onig_set_syntax_op2     (&SQLSyntax, 0);
  onig_set_syntax_behavior(&SQLSyntax, 0);
  onig_set_syntax_options (&SQLSyntax, ONIG_OPTION_MULTILINE);

  onig_set_meta_char(ONIG_META_CHAR_ANYCHAR,         (OnigCodePoint )'_');
  onig_set_meta_char(ONIG_META_CHAR_ANYCHAR_ANYTIME, (OnigCodePoint )'%');
  /* set @ as escape char. */
  /* onig_set_meta_char(ONIG_META_CHAR_ESCAPE, (OnigCodePoint )'@'); */

  r = onig_new(&reg, pattern, pattern + strlen(pattern),
	       ONIG_OPTION_DEFAULT, ONIG_ENCODING_ASCII, &SQLSyntax, &einfo);
  if (r != ONIG_NORMAL) {
    char s[ONIG_MAX_ERROR_MESSAGE_LEN];
    onig_error_code_to_str(s, r, &einfo);
    fprintf(stderr, "ERROR: %s\n", s);
    return -1;
  }

  region = onig_region_new();

  end   = str + strlen(str);
  start = str;
  range = end;
  r = onig_search(reg, str, end, start, range, region, ONIG_OPTION_NONE);
  if (r >= 0) {
    int i;

    fprintf(stderr, "match at %d\n", r);
    for (i = 0; i < region->num_regs; i++) {
      fprintf(stderr, "%d: (%d-%d)\n", i, region->beg[i], region->end[i]);
    }
  }
  else if (r == ONIG_MISMATCH) {
    fprintf(stderr, "search fail\n");
  }
  else { /* error */
    char s[ONIG_MAX_ERROR_MESSAGE_LEN];
    onig_error_code_to_str(s, r);
    fprintf(stderr, "ERROR: %s\n", s);
    return -1;
  }

  onig_region_free(region, 1 /* 1:free self, 0:free contents only */);
  onig_free(reg);
  onig_end();
  return 0;
}
