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/*
* Copyright (c) 1997, 1998, 1999, 2000, 2004
* Tama Communications Corporation
*
* This file is part of GNU GLOBAL.
*
* GNU GLOBAL is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* GNU GLOBAL is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <ctype.h>
#ifdef HAVE_STRING_H
#include <string.h>
#else
#include <strings.h>
#endif
#ifdef DEBUG
#include <stdio.h>
extern int debug;
#endif
#include "locatestring.h"
/*
* strincmp: strncmp with ignoring case.
*
* Interface is same with strncmp.
*/
static int
strincmp(string, pattern, len)
const char *string;
const char *pattern;
size_t len;
{
unsigned char s, p;
while (len--) {
s = tolower(*string++);
p = tolower(*pattern++);
if (s != p)
return s - p;
if (s == 0)
break;
}
return 0;
}
/*
* locatestring: locate pattern from string
*
* i) string string
* i) pattern pattern
* i) flag MATCH_FIRST: match first
* MATCH_AT_FIRST: match only at first column
* MATCH_LAST: match last
* MATCH_AT_LAST: match only at last column
* MATCH_COMPLETE match completely
* IGNORE_CASE: Ignore case
* r) pointer or NULL
* If the flag == MATCH_AT_FIRST then the pointer
* points the following character of the matched
* string, else points at the head of it.
*
* This function is made to avoid compatibility problems.
*/
int (*cmpfunc)(char *, char*, int);
char *
locatestring(string, pattern, flag)
const char *string;
const char *pattern;
int flag;
{
int c = *pattern;
int plen = strlen(pattern);
const char *p = NULL;
int slen;
int (*cmpfunc) ();
#ifdef DEBUG
FILE *dbg = stderr;
const char *pre = string;
#endif
cmpfunc = (flag & IGNORE_CASE) ? strincmp : strncmp;
flag &= ~IGNORE_CASE;
if (flag == MATCH_COMPLETE) {
if (strlen(string) == plen && !(*cmpfunc)(string, pattern, plen))
return (char *)string;
else
return NULL;
}
if (flag == MATCH_AT_LAST && (slen = strlen(string)) > plen)
string += (slen - plen);
for (; *string; string++) {
if (*string == c)
if (!(*cmpfunc)(string, pattern, plen)) {
p = string;
if (flag == MATCH_FIRST)
break;
}
if (flag == MATCH_AT_FIRST || flag == MATCH_AT_LAST)
break;
}
#ifdef DEBUG
if (debug) {
fprintf(dbg, "locatestring: ");
if (p == NULL)
fprintf(dbg, "%s", pre);
else {
const char *pp = p;
const char *post = pp + strlen(pattern);
for (; *pre && pre < pp; pre++)
fputc(*pre, dbg);
fputc('[', dbg);
for (; *pp && pp < post; pp++)
fputc(*pp, dbg);
fputc(']', dbg);
for (; *post; post++)
fputc(*post, dbg);
}
fputc('\n', dbg);
}
#endif
if (p && flag == MATCH_AT_FIRST)
p += plen;
return (char *)p;
}
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