/*- * 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. * * @(#)str.c 5.8 (Berkeley) 6/1/90 * $FreeBSD: src/usr.bin/make/str.c,v 1.12.2.2 2004/02/23 12:10:57 ru Exp $ * $DragonFly: src/usr.bin/make/str.c,v 1.20 2005/01/26 09:44:21 joerg Exp $ */ #include #include #include #include "buf.h" #include "globals.h" #include "str.h" #include "util.h" #include "var.h" static char **argv, *buffer; static int argmax, curlen; /* * str_init -- * Initialize the strings package * */ void str_init(void) { char *p1; argv = emalloc(((argmax = 50) + 1) * sizeof(char *)); argv[0] = Var_Value(".MAKE", VAR_GLOBAL, &p1); } /*- * str_concat -- * concatenate the two strings, inserting a space or slash between them. * * 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 = emalloc(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. * * 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(char *str, int *store_argc, Boolean expand) { int argc, ch; char inquote, *p, *start, *t; int len; /* skip leading space chars. */ for (; *str == ' ' || *str == '\t'; ++str) continue; /* allocate room for a copy of the string */ if ((len = strlen(str) + 1) > curlen) { if (buffer) free(buffer); buffer = 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 = buffer;; ++p) { switch(ch = *p) { case '"': case '\'': if (inquote) { if (ch != inquote) break; inquote = '\0'; /* Don't miss "" or '' */ if (!start) start = t; } else inquote = (char)ch; if (expand) continue; break; 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 = erealloc(argv, (argmax + 1) * sizeof(char *)); } argv[argc++] = start; start = 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; default: break; } break; default: break; } if (!start) start = t; *t++ = (char)ch; } done: argv[argc] = NULL; *store_argc = argc; return (argv); } /* * Quote a string for appending it to MAKEFLAGS. According to Posix the * kind of quoting here is implementation-defined. This quoting must ensure * that the parsing of MAKEFLAGS's contents in a sub-shell yields the same * options, option arguments and macro definitions as in the calling make. * We simply quote all blanks, which according to Posix are space and tab * in the POSIX locale. Don't use isblank because in that case makes with * different locale settings could not communicate. We must also quote * backslashes obviously. */ char * MAKEFLAGS_quote(const char *str) { char *ret, *q; const char *p; /* assume worst case - everything has to be quoted */ ret = emalloc(strlen(str) * 2 + 1); p = str; q = ret; while (*p != '\0') { switch (*p) { case ' ': case '\t': *q++ = '\\'; break; default: break; } *q++ = *p++; } *q++ = '\0'; return (ret); } char ** MAKEFLAGS_break(const char *str, int *pargc) { char *q, *start; int len; /* allocate room for a copy of the string */ if ((len = strlen(str) + 1) > curlen) buffer = erealloc(buffer, curlen = len); start = NULL; *pargc = 1; for (q = buffer;;) { switch (*str) { case ' ': case '\t': /* word separator */ if (start == NULL) { /* not in a word */ str++; continue; } /* FALLTHRU */ case '\0': if (start == NULL) goto done; /* finish word */ *q++ = '\0'; if (argmax == *pargc) { argmax *= 2; argv = erealloc(argv, sizeof(*argv) * (argmax + 1)); } argv[(*pargc)++] = start; start = NULL; if (*str++ == '\0') goto done; continue; case '\\': if (str[1] == ' ' || str[1] == '\t') /* was a quote */ str++; break; default: break; } if (start == NULL) /* start of new word */ start = q; *q++ = *str++; } done: argv[(*pargc)] = NULL; 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(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), * * Results: * Returns the beginning position of a match or null. The number * of characters matched is returned in len. * * Side Effects: * None * *----------------------------------------------------------------------- */ const char * Str_SYSVMatch(const char *word, const char *pattern, int *len) { const char *p = pattern; const char *w = word; const char *m; if (*w == '\0') { /* Zero-length word cannot be matched against */ *len = 0; return (NULL); } 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(Buffer *buf, const char *pat, const char *src, int len) { const char *m; if ((m = strchr(pat, '%')) != NULL) { /* Copy the prefix */ Buf_AddBytes(buf, m - pat, (const Byte *)pat); /* skip the % */ pat = m + 1; } /* Copy the pattern */ Buf_AddBytes(buf, len, (const Byte *)src); /* append the rest */ Buf_AddBytes(buf, strlen(pat), (const Byte *)pat); }