diff options
Diffstat (limited to 'str.c')
| -rw-r--r-- | str.c | 508 |
1 files changed, 508 insertions, 0 deletions
@@ -0,0 +1,508 @@ +/* $NetBSD: str.c,v 1.34 2012/03/03 23:16:47 dholland 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. + */ + +#ifndef MAKE_NATIVE +static char rcsid[] = "$NetBSD: str.c,v 1.34 2012/03/03 23:16:47 dholland Exp $"; +#else +#include <sys/cdefs.h> +#ifndef lint +#if 0 +static char sccsid[] = "@(#)str.c 5.8 (Berkeley) 6/1/90"; +#else +__RCSID("$NetBSD: str.c,v 1.34 2012/03/03 23:16:47 dholland Exp $"); +#endif +#endif /* not lint */ +#endif + +#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(const char *s1, const char *s2, int flags) +{ + int len1, len2; + char *result; + + /* get the length of both strings */ + len1 = strlen(s1); + len2 = strlen(s2); + + /* allocate length plus separator plus EOS */ + result = bmake_malloc((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); + + 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. + * + * If expand is TRUE, quotes are removed and escape sequences + * such as \r, \t, etc... are expanded. + * + * returns -- + * Pointer to the array of pointers to the words. + * Memory containing the actual words in *buffer. + * Both of these must be free'd by the caller. + * Number of words in *store_argc. + */ +char ** +brk_string(const char *str, int *store_argc, Boolean expand, char **buffer) +{ + int argc, ch; + char inquote, *start, *t; + const char *p; + int len; + int argmax = 50, curlen = 0; + char **argv = bmake_malloc((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 = bmake_malloc(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) { + if (!expand) { + start = t; + *t++ = ch; + } else + start = t + 1; + p++; + inquote = '\0'; + 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 **)bmake_realloc(argv, + (argmax + 1) * sizeof(char *)); + } + argv[argc++] = start; + start = NULL; + if (ch == '\n' || ch == '\0') { + if (expand && inquote) { + free(argv); + free(*buffer); + *buffer = NULL; + return NULL; + } + goto done; + } + continue; + case '\\': + if (!expand) { + if (!start) + start = t; + *t++ = '\\'; + if (*(p+1) == '\0') /* catch '\' at end of line */ + continue; + 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] = NULL; + *store_argc = argc; + return(argv); +} + +/* + * Str_FindSubstring -- See if a string contains a particular substring. + * + * Input: + * string String to search. + * substring Substring to find in string. + * + * 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(const char *string, const char *substring) +{ + const 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 UNCONST(string); + if (*a++ != *b++) + break; + } + b = substring; + } + return 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). + * + * XXX this function does not detect or report malformed patterns. + * + * Side effects: None. + */ +int +Str_Match(const char *string, const char *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), + * + * Input: + * word Word to examine + * pattern Pattern to examine against + * len Number of characters to substitute + * + * 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(const char *word, const char *pattern, int *len) +{ + const char *p = pattern; + const char *w = word; + const char *m; + + if (*p == '\0') { + /* Null pattern is the whole string */ + *len = strlen(w); + return UNCONST(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 UNCONST(w); + } + } + + m = w; + + /* Find a matching tail */ + do + if (strcmp(p, w) == 0) { + *len = w - m; + return UNCONST(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(Buffer *buf, char *pat, char *src, int len) +{ + char *m; + + if ((m = strchr(pat, '%')) != NULL) { + /* Copy the prefix */ + Buf_AddBytes(buf, m - pat, pat); + /* skip the % */ + pat = m + 1; + } + + /* Copy the pattern */ + Buf_AddBytes(buf, len, src); + + /* append the rest */ + Buf_AddBytes(buf, strlen(pat), pat); +} |