regex.h

   1 /*
   2  * regex.c: String and regex operations for odt2txt
   3  *
   4  * Copyright (c) 2006-2009 Dennis Stosberg <dennis@stosberg.net>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License,
   8  * version 2 as published by the Free Software Foundation
   9  */
  10
  11 #ifndef REGEX_H
  12 #define REGEX_H
  13
  14 #include <regex.h>
  15 #include <stdio.h>
  16 #include <stddef.h>
  17 #include <stdlib.h>
  18 #include <string.h>
  19
  20 #include "strbuf.h"
  21
  22 #define _REG_DEFAULT  0  /* Stop after first match, to be removed */
  23 #define _REG_GLOBAL   1  /* Find all matches of regexp */
  24 #define _REG_EXEC     2  /* subst is a function pointer */
  25
  26 /*
  27  * Deletes match(es) of regex from *buf.
  28  *
  29  * Returns the number of matches that were deleted.
  30  */
  31 int regex_rm(STRBUF *buf,
  32              const char *regex, int regopt);
  33
  34 /*
  35  * Replaces match(es) of regex from *buf with subst.
  36  */
  37 int regex_subst(STRBUF *buf,
  38                 const char *regex, int regopt,
  39                 const void *subst);
  40
  41 /*
  42  * Returns a pointer to a new string with two lines. The first line
  43  * contains str, the second line contains strlen(str) copies of
  44  * linechar.
  45  */
  46 char *underline(char linechar, const char *str);
  47
  48 /*
  49  * Wrappers around underline, to be used as argument to regex_subst
  50  * when regopt is _REG_EXEC.
  51  *
  52  * They replace the match in buf with underline('=',match) or
  53  * underline('-',match) respectively.
  54  */
  55 char *h1(const char *buf, regmatch_t matches[], size_t nmatch, size_t off);
  56 char *h2(const char *buf, regmatch_t matches[], size_t nmatch, size_t off);
  57
  58 /*
  59  * Replace match with the name of the image frame
  60  */
  61 char *image(const char *buf, regmatch_t matches[], size_t nmatch, size_t off);
  62
  63 /*
  64  * Copies the contents of buf to a new string buffer, wrapped to a
  65  * maximal line width of width characters.
  66  */
  67 STRBUF *wrap(STRBUF *buf, int width);
  68
  69 /*
  70  * number of characters that follow in the byte sequence
  71  */
  72 static const char utf8_length[128] =
  73         {
  74                 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x80-0x8f */
  75                 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x90-0x9f */
  76                 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0xa0-0xaf */
  77                 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0xb0-0xbf */
  78                 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* 0xc0-0xcf */
  79                 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* 0xd0-0xdf */
  80                 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, /* 0xe0-0xef */
  81                 3,3,3,3,3,3,3,3,4,4,4,4,5,5,0,0  /* 0xf0-0xff */
  82         };
  83
  84 #endif /* REGEX_H */