/* $Id$ */ /************************************************************************** * 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 "config.h" #include #include #include #include #include "nano.h" #include "proto.h" #ifndef NANO_SMALL #include #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++; } } char *revstrstr(char *haystack, char *needle, char *rev_start) { char *p, *q, *r; for(p = rev_start ; p >= haystack ; --p) { for (r = p, q = needle ; (*q == *r) && (*q != '\0') ; r++, q++) ; if (*q == '\0') return p; } return 0; } char *revstrcasestr(char *haystack, char *needle, char *rev_start) { char *p, *q, *r; for(p = rev_start ; p >= haystack ; --p) { for (r = p, q = needle ; (tolower(*q) == tolower(*r)) && (*q != '\0') ; r++, q++) ; if (*q == '\0') return p; } return 0; } /* This is now mutt's version (called mutt_stristr) because it doesn't use memory allocation to do a simple search (yuck). */ char *strcasestr(char *haystack, char *needle) { const char *p, *q; if (!haystack) return NULL; if (!needle) return (haystack); while (*(p = haystack)) { for (q = needle; *p && *q && tolower (*p) == tolower (*q); p++, q++) ; if (!*q) return (haystack); haystack++; } return NULL; } char *strstrwrapper(char *haystack, char *needle, char *rev_start) { #ifdef HAVE_REGEX_H int result; char *i, *j; if (ISSET(USE_REGEXP)) { if (!ISSET(REVERSE_SEARCH)) { result = regexec(&search_regexp, haystack, 10, regmatches, 0); if (!result) return haystack + regmatches[0].rm_so; } else { /* do quick check first */ if (!(regexec(&search_regexp, haystack, 10, regmatches, 0))) { /* there is a match */ for(i = rev_start ; i >= haystack ; --i) if (!(result = regexec(&search_regexp, i, 10, regmatches, 0))) { j = i + regmatches[0].rm_so; if (j <= rev_start) return j; } } } return 0; } #endif if (ISSET(CASE_SENSITIVE)) { if (!ISSET(REVERSE_SEARCH)) return strstr(haystack,needle); else return revstrstr(haystack, needle, rev_start); } else { if (!ISSET(REVERSE_SEARCH)) return strcasestr(haystack, needle); else return revstrcasestr(haystack, needle, rev_start); } } /* 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; } /* We're going to need this too - Hopefully this will minimize the transition cost of moving to the apropriate function. */ char *charalloc(size_t howmuch) { void *r; /* Panic save? */ if (!(r = calloc(howmuch, sizeof (char)))) die(_("nano: calloc: out of memory!")); return (char *) 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 malloc()ed 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 = charalloc(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 = charalloc(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