Attachment 146319 Details for Bug 217359 – regex_vs_strcoll.c

regex_vs_strcoll.c

regex_vs_strcoll.c (text/plain), 2.16 KB, created by Tim Waugh on 2007-01-23 17:04:40 UTC

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Creator: Tim Waugh

Created: 2007-01-23 17:04:40 UTC

Size: 2.16 KB

patch

obsolete

>#define _GNU_SOURCE
>#include <fnmatch.h>
>#include <langinfo.h>
>#include <locale.h>
>#include <regex.h>
>#include <stdint.h>
>#include <stdio.h>
>
>/* Lookup in a table of uint32_t, with default value 0xffffffff.  */
>uint32_t
>__collseq_table_lookup (const char *table, uint32_t wc)
>{
>  uint32_t shift1 = ((const uint32_t *) table)[0];
>  uint32_t index1 = wc >> shift1;
>  uint32_t bound = ((const uint32_t *) table)[1];
>  if (index1 < bound)
>    {
>      uint32_t lookup1 = ((const uint32_t *) table)[5 + index1];
>      if (lookup1 != 0)
>	{
>	  uint32_t shift2 = ((const uint32_t *) table)[2];
>	  uint32_t mask2 = ((const uint32_t *) table)[3];
>	  uint32_t index2 = (wc >> shift2) & mask2;
>	  uint32_t lookup2 = ((const uint32_t *)(table + lookup1))[index2];
>	  if (lookup2 != 0)
>	    {
>	      uint32_t mask3 = ((const uint32_t *) table)[4];
>	      uint32_t index3 = wc & mask3;
>	      uint32_t lookup3 = ((const uint32_t *)(table + lookup2))[index3];
>
>	      return lookup3;
>	    }
>	}
>    }
>  return ~((uint32_t) 0);
>}
>
>int
>main (void)
>{
>  setlocale (LC_ALL, "");
>  char *collseqwc = nl_langinfo (_NL_COLLATE_COLLSEQWC);
>  printf ("A %u\n", __collseq_table_lookup (collseqwc, L'A'));
>  printf ("H %u\n", __collseq_table_lookup (collseqwc, L'H'));
>  printf ("h %u\n", __collseq_table_lookup (collseqwc, L'h'));
>  printf ("Z %u\n", __collseq_table_lookup (collseqwc, L'Z'));
>  unsigned char *collseq = nl_langinfo (_NL_COLLATE_COLLSEQMB);
>  printf ("A %u\n", collseq['A']);
>  printf ("H %u\n", collseq['H']);
>  printf ("h %u\n", collseq['h']);
>  printf ("Z %u\n", collseq['Z']);
>  regex_t reg;
>  int regexec_ret;
>  if (regcomp (&reg, "[A-Z]", 0)) { puts ("regcomp failed"); return 1; }
>  regexec_ret = regexec (&reg, "h", 0, NULL, 0);
>  printf ("regex [A-Z] %s h\n", regexec_ret ? "did not match" : "matched");
>  int strcoll_1 = strcoll ("A", "h");
>  int strcoll_2 = strcoll ("h", "Z");
>  int strcoll_ret = strcoll_1 > 0 || strcoll_2 > 0;
>  printf ("strcoll (A, h) %d strcoll (h, Z) %d means %s\n", strcoll_1, strcoll_2,
>          strcoll_ret ? "not in range" : "in range");
>  int fnmatch_ret = fnmatch ("[A-Z]", "h", 0);
>  printf ("fnmatch ([A-Z], h, 0) %s\n", fnmatch_ret ? "did not match" : "matched");
>  return 0;
>}

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Attachments on bug 217359: 146319