nano/utils.c

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/* $Id$ */
/**************************************************************************
* utils.c *
* *
* Copyright (C) 1999 Chris Allegretta *
* This program 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 1, or (at your option) *
* any later version. *
* *
* This program 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., 675 Mass Ave, Cambridge, MA 02139, USA. *
* *
**************************************************************************/
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include "config.h"
#include "nano.h"
#include "proto.h"
#ifndef NANO_SMALL
#include <libintl.h>
#define _(string) gettext(string)
#else
#define _(string) (string)
#endif
/* Lower case a string - must be null terminated */
void lowercase(char *src)
{
long i = 0;
while (src[i] != 0) {
src[i] = (char) tolower(src[i]);
i++;
}
}
/* I can't believe I have to write this function */
char *strcasestr(char *haystack, char *needle)
{
char *localneedle, *localhaystack, *found, *tmp, *tmp2;
/* Make a copy of the search string and searcgh space */
localneedle = nmalloc(strlen(needle) + 2);
localhaystack = nmalloc(strlen(haystack) + 2);
strcpy(localneedle, needle);
strcpy(localhaystack, haystack);
/* Make them lowercase */
lowercase(localneedle);
lowercase(localhaystack);
/* Look for the lowercased substring in the lowercased search space -
return NULL if we didn't find anything */
if ((found = strstr(localhaystack, localneedle)) == NULL) {
free(localneedle);
free(localhaystack);
return NULL;
}
/* Else return the pointer to the same place in the real search space */
tmp2 = haystack;
for (tmp = localhaystack; tmp != found; tmp++)
tmp2++;
free(localneedle);
free(localhaystack);
return tmp2;
}
char *strstrwrapper(char *haystack, char *needle)
{
#ifdef HAVE_REGEX_H
if (ISSET(USE_REGEXP)) {
int result = regexec(&search_regexp, haystack, 10, regmatches, 0);
if (!result)
return haystack + regmatches[0].rm_so;
return 0;
}
#endif
if (ISSET(CASE_SENSITIVE))
return strstr(haystack, needle);
else
return strcasestr(haystack, needle);
}
/* Thanks BG, many ppl have been asking for this... */
void *nmalloc(size_t howmuch)
{
void *r;
/* Panic save? */
if (!(r = malloc(howmuch)))
die(_("nano: malloc: out of memory!"));
return r;
}
void *nrealloc(void *ptr, size_t howmuch)
{
void *r;
if (!(r = realloc(ptr, howmuch)))
die(_("nano: realloc: out of memory!"));
return r;
}
/* Copy one malloced string to another pointer.
Should be used as dest = mallocstrcpy(dest, src);
*/
void *mallocstrcpy(char *dest, char *src)
{
if (src == dest)
return src;
if (dest != NULL)
free(dest);
if (src == NULL) {
dest = NULL;
return(dest);
}
dest = nmalloc(strlen(src) + 1);
strcpy(dest, src);
return dest;
}
/* Append a new magic-line to filebot */
void new_magicline(void)
{
filebot->next = nmalloc(sizeof(filestruct));
filebot->next->data = nmalloc(1);
filebot->next->data[0] = '\0';
filebot->next->prev = filebot;
filebot->next->next = NULL;
filebot->next->lineno = filebot->lineno + 1;
filebot = filebot->next;
totlines++;
totsize++;
}
#ifndef DISABLE_TABCOMP
/*
* Routine to see if a text string is matched by a wildcard pattern.
* Returns TRUE if the text is matched, or FALSE if it is not matched
* or if the pattern is invalid.
* * matches zero or more characters
* ? matches a single character
* [abc] matches 'a', 'b' or 'c'
* \c quotes character c
* Adapted from code written by Ingo Wilken, and
* then taken from sash, Copyright (c) 1999 by David I. Bell
* Permission is granted to use, distribute, or modify this source,
* provided that this copyright notice remains intact.
* Permission to distribute this code under the GPL has been granted.
*/
int check_wildcard_match(const char *text, const char *pattern)
{
const char *retryPat;
const char *retryText;
int ch;
int found;
int len;
retryPat = NULL;
retryText = NULL;
while (*text || *pattern) {
ch = *pattern++;
switch (ch) {
case '*':
retryPat = pattern;
retryText = text;
break;
case '[':
found = FALSE;
while ((ch = *pattern++) != ']') {
if (ch == '\\')
ch = *pattern++;
if (ch == '\0')
return FALSE;
if (*text == ch)
found = TRUE;
}
len = strlen(text);
if (found == FALSE && len != 0) {
return FALSE;
}
if (found == TRUE) {
if (strlen(pattern) == 0 && len == 1) {
return TRUE;
}
if (len != 0) {
text++;
continue;
}
}
/* fall into next case */
case '?':
if (*text++ == '\0')
return FALSE;
break;
case '\\':
ch = *pattern++;
if (ch == '\0')
return FALSE;
/* fall into next case */
default:
if (*text == ch) {
if (*text)
text++;
break;
}
if (*text) {
pattern = retryPat;
text = ++retryText;
break;
}
return FALSE;
}
if (pattern == NULL)
return FALSE;
}
return TRUE;
}
#endif