freebsd-nq/contrib/bmake/str.c
Simon J. Gerraty e2eeea75eb Merge bmake-20201117
o allow env var MAKE_OBJDIR_CHECK_WRITABLE=no to skip writable
  checks in InitObjdir.  Explicit .OBJDIR target always allows
  read-only directory.

o More code cleanup and refactoring.

o More unit tests

MFC after:	1 week
2020-11-20 06:02:31 +00:00

369 lines
10 KiB
C

/* $NetBSD: str.c,v 1.74 2020/11/16 18:28:27 rillig Exp $ */
/*-
* Copyright (c) 1988, 1989, 1990, 1993
* The Regents of the University of California. 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. 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.
*/
/*-
* 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.
*/
#include "make.h"
/* "@(#)str.c 5.8 (Berkeley) 6/1/90" */
MAKE_RCSID("$NetBSD: str.c,v 1.74 2020/11/16 18:28:27 rillig Exp $");
/* Return the concatenation of s1 and s2, freshly allocated. */
char *
str_concat2(const char *s1, const char *s2)
{
size_t len1 = strlen(s1);
size_t len2 = strlen(s2);
char *result = bmake_malloc(len1 + len2 + 1);
memcpy(result, s1, len1);
memcpy(result + len1, s2, len2 + 1);
return result;
}
/* Return the concatenation of s1, s2 and s3, freshly allocated. */
char *
str_concat3(const char *s1, const char *s2, const char *s3)
{
size_t len1 = strlen(s1);
size_t len2 = strlen(s2);
size_t len3 = strlen(s3);
char *result = bmake_malloc(len1 + len2 + len3 + 1);
memcpy(result, s1, len1);
memcpy(result + len1, s2, len2);
memcpy(result + len1 + len2, s3, len3 + 1);
return result;
}
/* Return the concatenation of s1, s2, s3 and s4, freshly allocated. */
char *
str_concat4(const char *s1, const char *s2, const char *s3, const char *s4)
{
size_t len1 = strlen(s1);
size_t len2 = strlen(s2);
size_t len3 = strlen(s3);
size_t len4 = strlen(s4);
char *result = bmake_malloc(len1 + len2 + len3 + len4 + 1);
memcpy(result, s1, len1);
memcpy(result + len1, s2, len2);
memcpy(result + len1 + len2, s3, len3);
memcpy(result + len1 + len2 + len3, s4, len4 + 1);
return result;
}
/* Fracture a string into an array of words (as delineated by tabs or spaces)
* taking quotation marks into account.
*
* If expand is TRUE, quotes are removed and escape sequences such as \r, \t,
* etc... are expanded. In this case, return NULL on parse errors.
*
* Returns the fractured words, which must be freed later using Words_Free,
* unless the returned Words.words was NULL.
*/
Words
Str_Words(const char *str, Boolean expand)
{
size_t str_len;
char *words_buf;
size_t words_cap;
char **words;
size_t words_len;
char inquote;
char *word_start;
char *word_end;
const char *str_p;
/* XXX: why only hspace, not whitespace? */
cpp_skip_hspace(&str); /* skip leading space chars. */
/* words_buf holds the words, separated by '\0'. */
str_len = strlen(str);
words_buf = bmake_malloc(strlen(str) + 1);
words_cap = str_len / 5 > 50 ? str_len / 5 : 50;
words = bmake_malloc((words_cap + 1) * sizeof(char *));
/*
* copy the string; at the same time, parse backslashes,
* quotes and build the word list.
*/
words_len = 0;
inquote = '\0';
word_start = words_buf;
word_end = words_buf;
for (str_p = str;; ++str_p) {
char ch = *str_p;
switch (ch) {
case '"':
case '\'':
if (inquote) {
if (inquote == ch)
inquote = '\0';
else
break;
} else {
inquote = ch;
/* Don't miss "" or '' */
if (word_start == NULL && str_p[1] == inquote) {
if (!expand) {
word_start = word_end;
*word_end++ = ch;
} else
word_start = word_end + 1;
str_p++;
inquote = '\0';
break;
}
}
if (!expand) {
if (word_start == NULL)
word_start = word_end;
*word_end++ = ch;
}
continue;
case ' ':
case '\t':
case '\n':
if (inquote)
break;
if (word_start == NULL)
continue;
/* FALLTHROUGH */
case '\0':
/*
* end of a token -- make sure there's enough words
* space and save off a pointer.
*/
if (word_start == NULL)
goto done;
*word_end++ = '\0';
if (words_len == words_cap) {
size_t new_size;
words_cap *= 2; /* ramp up fast */
new_size = (words_cap + 1) * sizeof(char *);
words = bmake_realloc(words, new_size);
}
words[words_len++] = word_start;
word_start = NULL;
if (ch == '\n' || ch == '\0') {
if (expand && inquote) {
free(words);
free(words_buf);
return (Words){ NULL, 0, NULL };
}
goto done;
}
continue;
case '\\':
if (!expand) {
if (word_start == NULL)
word_start = word_end;
*word_end++ = '\\';
/* catch '\' at end of line */
if (str_p[1] == '\0')
continue;
ch = *++str_p;
break;
}
switch (ch = *++str_p) {
case '\0':
case '\n':
/* hmmm; fix it up as best we can */
ch = '\\';
str_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 (word_start == NULL)
word_start = word_end;
*word_end++ = ch;
}
done:
words[words_len] = NULL; /* useful for argv */
return (Words){ words, words_len, words_buf };
}
/*
* Str_Match -- Test if a string matches a pattern like "*.[ch]".
* The following special characters are known *?\[] (as in fnmatch(3)).
*
* XXX: this function does not detect or report malformed patterns.
*/
Boolean
Str_Match(const char *str, const char *pat)
{
for (;;) {
/*
* See if we're at the end of both the pattern and the
* string. If so, we succeeded. If we're at the end of the
* pattern but not at the end of the string, we failed.
*/
if (*pat == '\0')
return *str == '\0';
if (*str == '\0' && *pat != '*')
return FALSE;
/*
* A '*' in the pattern matches any substring. We handle this
* by calling ourselves for each suffix of the string.
*/
if (*pat == '*') {
pat++;
while (*pat == '*')
pat++;
if (*pat == '\0')
return TRUE;
while (*str != '\0') {
if (Str_Match(str, pat))
return TRUE;
str++;
}
return FALSE;
}
/* A '?' in the pattern matches any single character. */
if (*pat == '?')
goto thisCharOK;
/*
* A '[' in the pattern matches a character from a list.
* The '[' is followed by the list of acceptable characters,
* or by ranges (two characters separated by '-'). In these
* character lists, the backslash is an ordinary character.
*/
if (*pat == '[') {
Boolean neg = pat[1] == '^';
pat += neg ? 2 : 1;
for (;;) {
if (*pat == ']' || *pat == '\0') {
if (neg)
break;
return FALSE;
}
/* XXX: This naive comparison makes the parser
* for the pattern dependent on the actual of
* the string. This is unpredictable. */
if (*pat == *str)
break;
if (pat[1] == '-') {
if (pat[2] == '\0')
return neg;
if (*pat <= *str && pat[2] >= *str)
break;
if (*pat >= *str && pat[2] <= *str)
break;
pat += 2;
}
pat++;
}
if (neg && *pat != ']' && *pat != '\0')
return FALSE;
while (*pat != ']' && *pat != '\0')
pat++;
if (*pat == '\0')
pat--;
goto thisCharOK;
}
/*
* A backslash in the pattern matches the character following
* it exactly.
*/
if (*pat == '\\') {
pat++;
if (*pat == '\0')
return FALSE;
}
if (*pat != *str)
return FALSE;
thisCharOK:
pat++;
str++;
}
}