1 /* $NetBSD: string.c,v 1.10 2009/04/14 08:50:06 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Edward Wang at The University of California, Berkeley. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)string.c 8.1 (Berkeley) 6/6/93"; 39 #else 40 __RCSID("$NetBSD: string.c,v 1.10 2009/04/14 08:50:06 lukem Exp $"); 41 #endif 42 #endif /* not lint */ 43 44 #include <stdio.h> 45 #include <stdlib.h> 46 #include <string.h> 47 #define EXTERN 48 #include "window_string.h" 49 #undef EXTERN 50 51 char * 52 str_cpy(const char *s) 53 { 54 char *str; 55 char *p; 56 57 str = p = str_alloc(strlen(s) + 1); 58 if (p == 0) 59 return 0; 60 while ((*p++ = *s++)) 61 ; 62 return str; 63 } 64 65 char * 66 str_ncpy(const char *s, int n) 67 { 68 int l = strlen(s); 69 char *str; 70 char *p; 71 72 if (n > l) 73 n = l; 74 str = p = str_alloc(n + 1); 75 if (p == 0) 76 return 0; 77 while (--n >= 0) 78 *p++ = *s++; 79 *p = 0; 80 return str; 81 } 82 83 char * 84 str_itoa(int i) 85 { 86 char buf[30]; 87 88 (void) snprintf(buf, sizeof(buf), "%d", i); 89 return str_cpy(buf); 90 } 91 92 char * 93 str_cat(const char *s1, const char *s2) 94 { 95 char *str; 96 char *p; 97 const char *q; 98 99 str = p = str_alloc(strlen(s1) + strlen(s2) + 1); 100 if (p == 0) 101 return 0; 102 for (q = s1; (*p++ = *q++);) 103 ; 104 for (q = s2, p--; (*p++ = *q++);) 105 ; 106 return str; 107 } 108 109 /* 110 * match s against p. 111 * s can be a prefix of p with at least min characters. 112 */ 113 int 114 str_match(const char *s, const char *p, int min) 115 { 116 for (; *s && *p && *s == *p; s++, p++, min--) 117 ; 118 return *s == *p || (*s == 0 && min <= 0); 119 } 120 121 #ifdef STR_DEBUG 122 char * 123 str_alloc(size_t l) 124 { 125 struct string *s; 126 127 s = (struct string *) malloc(l + str_offset); 128 if (s == 0) 129 return 0; 130 if (str_head.s_forw == 0) 131 str_head.s_forw = str_head.s_back = &str_head; 132 s->s_forw = str_head.s_forw; 133 s->s_back = &str_head; 134 str_head.s_forw = s; 135 s->s_forw->s_back = s; 136 return s->s_data; 137 } 138 139 void 140 str_free(char *str) 141 { 142 struct string *s; 143 144 for (s = str_head.s_forw; s != &str_head && s->s_data != str; 145 s = s->s_forw) 146 ; 147 if (s == &str_head) 148 abort(); 149 s->s_back->s_forw = s->s_forw; 150 s->s_forw->s_back = s->s_back; 151 free((char *)s); 152 } 153 #endif 154