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- /*-
- * Copyright (c) 1988, 1989, 1990 The Regents of the University of California.
- * Copyright (c) 1988, 1989 by Adam de Boor
- * Copyright (c) 1989 by Berkeley Softworks
- * All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Adam de Boor.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
- #ifdef DF_POSIX
- #include <misc.h>
- #include <bsdlib.h>
- #endif /* not lint */
- #ifndef lint
- static char sccsid[] = "@(#)str.c 5.8 (Berkeley) 6/1/90";
- #endif /* not lint */
-
- #include "make.h"
-
- /*-
- * str_concat --
- * concatenate the two strings, inserting a space or slash between them,
- * freeing them if requested.
- *
- * returns --
- * the resulting string in allocated space.
- */
- char *
- str_concat(s1, s2, flags)
- char *s1, *s2;
- int flags;
- {
- register int len1, len2;
- register char *result;
-
- /* get the length of both strings */
- len1 = strlen(s1);
- len2 = strlen(s2);
-
- /* allocate length plus separator plus EOS */
- result = emalloc((u_int)(len1 + len2 + 2));
-
- /* copy first string into place */
- bcopy(s1, result, len1);
-
- /* add separator character */
- if (flags & STR_ADDSPACE) {
- result[len1] = ' ';
- ++len1;
- } else if (flags & STR_ADDSLASH) {
- result[len1] = '/';
- ++len1;
- }
-
- /* copy second string plus EOS into place */
- bcopy(s2, result + len1, len2 + 1);
-
- /* free original strings */
- if (flags & STR_DOFREE) {
- (void)free(s1);
- (void)free(s2);
- }
- return(result);
- }
-
- /*-
- * brk_string --
- * Fracture a string into an array of words (as delineated by tabs or
- * spaces) taking quotation marks into account. Leading tabs/spaces
- * are ignored.
- *
- * returns --
- * Pointer to the array of pointers to the words. To make life easier,
- * the first word is always the value of the .MAKE variable.
- */
- char **
- brk_string(str, store_argc)
- register char *str;
- int *store_argc;
- {
- static int argmax, curlen;
- static char **argv, *buf;
- register int argc, ch;
- register char inquote, *p, *start, *t;
- int len;
-
- /* save off pmake variable */
- if (!argv) {
- argv = (char **)emalloc((argmax = 50) * sizeof(char *));
- argv[0] = Var_Value(".MAKE", VAR_GLOBAL);
- }
-
- /* skip leading space chars.
- for (; *str == ' ' || *str == '\t'; ++str);
-
- /* allocate room for a copy of the string */
- if ((len = strlen(str) + 1) > curlen)
- buf = emalloc(curlen = len);
-
- /*
- * copy the string; at the same time, parse backslashes,
- * quotes and build the argument list.
- */
- argc = 1;
- inquote = '\0';
- for (p = str, start = t = buf;; ++p) {
- switch(ch = *p) {
- case '"':
- case '\'':
- if (inquote)
- if (inquote == ch)
- inquote = NULL;
- else
- break;
- else
- inquote = ch;
- continue;
- case ' ':
- case '\t':
- if (inquote)
- break;
- if (!start)
- continue;
- /* FALLTHROUGH */
- case '\n':
- case '\0':
- /*
- * end of a token -- make sure there's enough argv
- * space and save off a pointer.
- */
- *t++ = '\0';
- if (argc == argmax) {
- argmax *= 2; /* ramp up fast */
- if (!(argv = (char **)realloc(argv,
- argmax * sizeof(char *))))
- enomem();
- }
- argv[argc++] = start;
- start = (char *)NULL;
- if (ch == '\n' || ch == '\0')
- goto done;
- continue;
- case '\\':
- switch (ch = *++p) {
- case '\0':
- case '\n':
- /* hmmm; fix it up as best we can */
- ch = '\\';
- --p;
- break;
- case 'b':
- ch = '\b';
- break;
- case 'f':
- ch = '\f';
- break;
- case 'n':
- ch = '\n';
- break;
- case 'r':
- ch = '\r';
- break;
- case 't':
- ch = '\t';
- break;
- }
- break;
- }
- if (!start)
- start = t;
- *t++ = ch;
- }
- done: argv[argc] = (char *)NULL;
- *store_argc = argc;
- return(argv);
- }
-
- /*
- * Str_FindSubstring -- See if a string contains a particular substring.
- *
- * Results: If string contains substring, the return value is the location of
- * the first matching instance of substring in string. If string doesn't
- * contain substring, the return value is NULL. Matching is done on an exact
- * character-for-character basis with no wildcards or special characters.
- *
- * Side effects: None.
- */
- char *
- Str_FindSubstring(string, substring)
- register char *string; /* String to search. */
- char *substring; /* Substring to find in string */
- {
- register char *a, *b;
-
- /*
- * First scan quickly through the two strings looking for a single-
- * character match. When it's found, then compare the rest of the
- * substring.
- */
-
- for (b = substring; *string != 0; string += 1) {
- if (*string != *b)
- continue;
- a = string;
- for (;;) {
- if (*b == 0)
- return(string);
- if (*a++ != *b++)
- break;
- }
- b = substring;
- }
- return((char *) NULL);
- }
-
- /*
- * Str_Match --
- *
- * See if a particular string matches a particular pattern.
- *
- * Results: Non-zero is returned if string matches pattern, 0 otherwise. The
- * matching operation permits the following special characters in the
- * pattern: *?\[] (see the man page for details on what these mean).
- *
- * Side effects: None.
- */
- Str_Match(string, pattern)
- register char *string; /* String */
- register char *pattern; /* Pattern */
- {
- char c2;
-
- for (;;) {
- /*
- * See if we're at the end of both the pattern and the
- * string. If, we succeeded. If we're at the end of the
- * pattern but not at the end of the string, we failed.
- */
- if (*pattern == 0)
- return(!*string);
- if (*string == 0 && *pattern != '*')
- return(0);
- /*
- * Check for a "*" as the next pattern character. It matches
- * any substring. We handle this by calling ourselves
- * recursively for each postfix of string, until either we
- * match or we reach the end of the string.
- */
- if (*pattern == '*') {
- pattern += 1;
- if (*pattern == 0)
- return(1);
- while (*string != 0) {
- if (Str_Match(string, pattern))
- return(1);
- ++string;
- }
- return(0);
- }
- /*
- * Check for a "?" as the next pattern character. It matches
- * any single character.
- */
- if (*pattern == '?')
- goto thisCharOK;
- /*
- * Check for a "[" as the next pattern character. It is
- * followed by a list of characters that are acceptable, or
- * by a range (two characters separated by "-").
- */
- if (*pattern == '[') {
- ++pattern;
- for (;;) {
- if ((*pattern == ']') || (*pattern == 0))
- return(0);
- if (*pattern == *string)
- break;
- if (pattern[1] == '-') {
- c2 = pattern[2];
- if (c2 == 0)
- return(0);
- if ((*pattern <= *string) &&
- (c2 >= *string))
- break;
- if ((*pattern >= *string) &&
- (c2 <= *string))
- break;
- pattern += 2;
- }
- ++pattern;
- }
- while ((*pattern != ']') && (*pattern != 0))
- ++pattern;
- goto thisCharOK;
- }
- /*
- * If the next pattern character is '/', just strip off the
- * '/' so we do exact matching on the character that follows.
- */
- if (*pattern == '\\') {
- ++pattern;
- if (*pattern == 0)
- return(0);
- }
- /*
- * There's no special character. Just make sure that the
- * next characters of each string match.
- */
- if (*pattern != *string)
- return(0);
- thisCharOK: ++pattern;
- ++string;
- }
- }
-