1 /*********************************************************************** 2 * * 3 * This software is part of the ast package * 4 * Copyright (c) 1985-2011 AT&T Intellectual Property * 5 * and is licensed under the * 6 * Eclipse Public License, Version 1.0 * 7 * by AT&T Intellectual Property * 8 * * 9 * A copy of the License is available at * 10 * http://www.eclipse.org/org/documents/epl-v10.html * 11 * (with md5 checksum b35adb5213ca9657e911e9befb180842) * 12 * * 13 * Information and Software Systems Research * 14 * AT&T Research * 15 * Florham Park NJ * 16 * * 17 * Glenn Fowler <gsf@research.att.com> * 18 * David Korn <dgk@research.att.com> * 19 * Phong Vo <kpv@research.att.com> * 20 * * 21 ***********************************************************************/ 22 #pragma prototyped 23 /* 24 * Glenn Fowler 25 * AT&T Bell Laboratories 26 * 27 * in place replace of first occurrence of /match/ with /replace/ in path 28 * end of path returned 29 */ 30 31 #define _AST_API_H 1 32 33 #include <ast.h> 34 35 char* 36 pathrepl(char* path, const char* match, const char* replace) 37 { 38 return pathrepl_20100601(path, PATH_MAX, match, replace); 39 } 40 41 #undef _AST_API_H 42 43 #include <ast_api.h> 44 45 char* 46 pathrepl_20100601(register char* path, size_t size, const char* match, register const char* replace) 47 { 48 register const char* m = match; 49 register const char* r; 50 char* t; 51 52 if (!match) 53 match = ""; 54 if (!replace) 55 replace = ""; 56 if (streq(match, replace)) 57 return(path + strlen(path)); 58 if (!size) 59 size = strlen(path) + 1; 60 for (;;) 61 { 62 while (*path && *path++ != '/'); 63 if (!*path) break; 64 if (*path == *m) 65 { 66 t = path; 67 while (*m && *m++ == *path) path++; 68 if (!*m && *path == '/') 69 { 70 register char* p; 71 72 p = t; 73 r = replace; 74 while (p < path && *r) *p++ = *r++; 75 if (p < path) while (*p++ = *path++); 76 else if (*r && p >= path) 77 { 78 register char* u; 79 80 t = path + strlen(path); 81 u = t + strlen(r); 82 while (t >= path) *u-- = *t--; 83 while (*r) *p++ = *r++; 84 } 85 else p += strlen(p) + 1; 86 return(p - 1); 87 } 88 path = t; 89 m = match; 90 } 91 } 92 return(path); 93 } 94