/* $OpenBSD: str.c,v 1.4 1996/06/26 05:36:37 deraadt Exp $ */ /* $NetBSD: str.c,v 1.12 1996/03/29 02:17:34 jtc Exp $ */ /*- * Copyright (c) 1988, 1989, 1990 The Regents of the University of California. * Copyright (c) 1988, 1989 by Adam de Boor * 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 1.4 1996/06/26 05:36:37 deraadt Exp $"; #endif #endif /* not lint */ #include "make.h" static char **argv, *buffer; static int argmax, curlen; /* * str_init -- * Initialize the strings package * */ void str_init() { char *p1; argv = (char **)emalloc(((argmax = 50) + 1) * sizeof(char *)); argv[0] = Var_Value(".MAKE", VAR_GLOBAL, &p1); } /* * str_end -- * Cleanup the strings package * */ void str_end() { if (argv[0]) { free(argv[0]); free((Address) argv); } if (buffer) free(buffer); } /*- * 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) register char *str; int *store_argc; Boolean expand; { register int argc, ch; register 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 (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_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; } } /*- *----------------------------------------------------------------------- * 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); }