Annotation of src/usr.bin/window/string.c, Revision 1.8
1.8 ! david 1: /* $OpenBSD: string.c,v 1.7 2003/06/03 02:56:23 millert Exp $ */
1.1 deraadt 2: /* $NetBSD: string.c,v 1.5 1995/09/29 00:44:06 cgd Exp $ */
3:
4: /*
5: * Copyright (c) 1983, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * This code is derived from software contributed to Berkeley by
9: * Edward Wang at The University of California, Berkeley.
10: *
11: * Redistribution and use in source and binary forms, with or without
12: * modification, are permitted provided that the following conditions
13: * are met:
14: * 1. Redistributions of source code must retain the above copyright
15: * notice, this list of conditions and the following disclaimer.
16: * 2. Redistributions in binary form must reproduce the above copyright
17: * notice, this list of conditions and the following disclaimer in the
18: * documentation and/or other materials provided with the distribution.
1.7 millert 19: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 20: * may be used to endorse or promote products derived from this software
21: * without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: * SUCH DAMAGE.
34: */
35:
36: #ifndef lint
37: #if 0
38: static char sccsid[] = "@(#)string.c 8.1 (Berkeley) 6/6/93";
39: #else
1.8 ! david 40: static char rcsid[] = "$OpenBSD: string.c,v 1.7 2003/06/03 02:56:23 millert Exp $";
1.1 deraadt 41: #endif
42: #endif /* not lint */
43:
44: #include "string.h"
1.8 ! david 45: #include <stdio.h>
1.1 deraadt 46: #include <stdlib.h>
47: #include <string.h>
48:
49: char *
50: str_cpy(s)
1.5 mpech 51: char *s;
1.1 deraadt 52: {
53: char *str;
1.5 mpech 54: char *p;
1.1 deraadt 55:
56: str = p = str_alloc(strlen(s) + 1);
57: if (p == 0)
58: return 0;
59: while (*p++ = *s++)
60: ;
61: return str;
62: }
63:
64: char *
65: str_ncpy(s, n)
1.5 mpech 66: char *s;
67: int n;
1.1 deraadt 68: {
69: int l = strlen(s);
70: char *str;
1.5 mpech 71: char *p;
1.1 deraadt 72:
73: if (n > l)
74: n = l;
75: str = p = str_alloc(n + 1);
76: if (p == 0)
77: return 0;
78: while (--n >= 0)
79: *p++ = *s++;
80: *p = 0;
81: return str;
82: }
83:
84: char *
85: str_itoa(i)
86: int i;
87: {
88: char buf[30];
89:
1.6 pvalchev 90: (void) snprintf(buf, sizeof(buf), "%d", i);
1.1 deraadt 91: return str_cpy(buf);
92: }
93:
94: char *
95: str_cat(s1, s2)
96: char *s1, *s2;
97: {
98: char *str;
1.5 mpech 99: char *p, *q;
1.1 deraadt 100:
101: str = p = str_alloc(strlen(s1) + strlen(s2) + 1);
102: if (p == 0)
103: return 0;
104: for (q = s1; *p++ = *q++;)
105: ;
106: for (q = s2, p--; *p++ = *q++;)
107: ;
108: return str;
109: }
110:
111: /*
112: * match s against p.
113: * s can be a prefix of p with at least min characters.
114: */
115: str_match(s, p, min)
1.5 mpech 116: char *s, *p;
117: int min;
1.1 deraadt 118: {
119: for (; *s && *p && *s == *p; s++, p++, min--)
120: ;
121: return *s == *p || *s == 0 && min <= 0;
122: }
123:
124: #ifdef STR_DEBUG
125: char *
126: str_alloc(l)
127: int l;
128: {
1.5 mpech 129: struct string *s;
1.1 deraadt 130:
1.4 millert 131: s = (struct string *) malloc(l + str_offset);
1.1 deraadt 132: if (s == 0)
133: return 0;
134: if (str_head.s_forw == 0)
135: str_head.s_forw = str_head.s_back = &str_head;
136: s->s_forw = str_head.s_forw;
137: s->s_back = &str_head;
138: str_head.s_forw = s;
139: s->s_forw->s_back = s;
140: return s->s_data;
141: }
142:
143: str_free(str)
144: char *str;
145: {
1.5 mpech 146: struct string *s;
1.1 deraadt 147:
148: for (s = str_head.s_forw; s != &str_head && s->s_data != str;
149: s = s->s_forw)
150: ;
151: if (s == &str_head)
152: abort();
153: s->s_back->s_forw = s->s_forw;
154: s->s_forw->s_back = s->s_back;
155: free((char *)s);
156: }
157: #endif
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