Return to str.c CVS log

Up to [local] / src / usr.bin / make

- introduce interval_dup in str.c
- use it to replace .for parsing with something approaching sanity.
(this removes one of the few most blatant misuses of Bufs in make.

More changes to come... patch reviewed by ho@

/*	$OpenBSD: str.c,v 1.9 1999/12/06 22:18:56 espie Exp $	*/
/*	$NetBSD: str.c,v 1.13 1996/11/06 17:59:23 christos Exp $	*/

/*-
 * 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
#if 0
static char     sccsid[] = "@(#)str.c	5.8 (Berkeley) 6/1/90";
#else
static char rcsid[] = "$OpenBSD: str.c,v 1.9 1999/12/06 22:18:56 espie Exp $";
#endif
#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, expand, buffer)
	register char *str;
	int *store_argc;
	Boolean expand;
	char **buffer;
{
	register int argc, ch;
	register char inquote, *p, *start, *t;
	int len;
	int argmax = 50, curlen = 0;
    	char **argv = (char **)emalloc((argmax + 1) * sizeof(char *));

	/* skip leading space chars. */
	for (; *str == ' ' || *str == '\t'; ++str)
		continue;

	/* allocate room for a copy of the string */
	if ((len = strlen(str) + 1) > curlen)
		*buffer = emalloc(curlen = len);

	/*
	 * copy the string; at the same time, parse backslashes,
	 * quotes and build the argument list.
	 */
	argc = 0;
	inquote = '\0';
	for (p = str, start = t = *buffer;; ++p) {
		switch(ch = *p) {
		case '"':
		case '\'':
			if (inquote) {
				if (inquote == ch)
					inquote = '\0';
				else
					break;
			} else {
				inquote = (char) ch;
				/* Don't miss "" or '' */
				if (start == NULL && p[1] == inquote) {
					start = t + 1;
					break;
				}
			}
			if (!expand) {
				if (!start)
					start = t;
				*t++ = ch;
			}
			continue;
		case ' ':
		case '\t':
		case '\n':
			if (inquote)
				break;
			if (!start)
				continue;
			/* FALLTHROUGH */
		case '\0':
			/*
			 * end of a token -- make sure there's enough argv
			 * space and save off a pointer.
			 */
			if (!start)
			    goto done;

			*t++ = '\0';
			if (argc == argmax) {
				argmax *= 2;		/* ramp up fast */
				argv = (char **)erealloc(argv,
				    (argmax + 1) * sizeof(char *));
			}
			argv[argc++] = start;
			start = (char *)NULL;
			if (ch == '\n' || ch == '\0')
				goto done;
			continue;
		case '\\':
			if (!expand) {
				if (!start)
					start = t;
				*t++ = '\\';
				ch = *++p;
				break;
			}

			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_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;
	}
}


/*-
 *-----------------------------------------------------------------------
 * Str_SYSVMatch --
 *	Check word against pattern for a match (% is wild),
 *
 * Results:
 *	Returns the beginning position of a match or null. The number
 *	of characters matched is returned in len.
 *
 * Side Effects:
 *	None
 *
 *-----------------------------------------------------------------------
 */
char *
Str_SYSVMatch(word, pattern, len)
    char	*word;		/* Word to examine */
    char	*pattern;	/* Pattern to examine against */
    int		*len;		/* Number of characters to substitute */
{
    char *p = pattern;
    char *w = word;
    char *m;

    if (*p == '\0') {
	/* Null pattern is the whole string */
	*len = strlen(w);
	return w;
    }

    if ((m = strchr(p, '%')) != NULL) {
	/* check that the prefix matches */
	for (; p != m && *w && *w == *p; w++, p++)
	     continue;

	if (p != m)
	    return NULL;	/* No match */

	if (*++p == '\0') {
	    /* No more pattern, return the rest of the string */
	    *len = strlen(w);
	    return w;
	}
    }

    m = w;

    /* Find a matching tail */
    do
	if (strcmp(p, w) == 0) {
	    *len = w - m;
	    return m;
	}
    while (*w++ != '\0');

    return NULL;
}


/*-
 *-----------------------------------------------------------------------
 * Str_SYSVSubst --
 *	Substitute '%' on the pattern with len characters from src.
 *	If the pattern does not contain a '%' prepend len characters
 *	from src.
 *
 * Results:
 *	None
 *
 * Side Effects:
 *	Places result on buf
 *
 *-----------------------------------------------------------------------
 */
void
Str_SYSVSubst(buf, pat, src, len)
    Buffer buf;
    char *pat;
    char *src;
    int   len;
{
    char *m;

    if ((m = strchr(pat, '%')) != NULL) {
	/* Copy the prefix */
	Buf_AddBytes(buf, m - pat, (Byte *) pat);
	/* skip the % */
	pat = m + 1;
    }

    /* Copy the pattern */
    Buf_AddBytes(buf, len, (Byte *) src);

    /* append the rest */
    Buf_AddBytes(buf, strlen(pat), (Byte *) pat);
}

char *
interval_dup(begin, end)
    const char *begin;
    const char *end;
{
    char *s;

    s = emalloc(end - begin + 1);
    memcpy(s, begin, end - begin);
    s[end-begin] = '\0';
    return s;
}