4.4BSD/usr/src/usr.bin/make/str.c
/*-
* Copyright (c) 1988, 1989, 1990, 1993
* The Regents of the University of California. All rights reserved.
* 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.
*/
#ifndef lint
static char sccsid[] = "@(#)str.c 8.1 (Berkeley) 6/6/93";
#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 */
memcpy(result, s1, 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 */
memcpy(result + len1, s2, 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)
continue;
/* 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 = (char) 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++ = (char) 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.
*/
int
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;
}
}