window(1): Remove __RCSID & friends.
[dragonfly.git] / usr.bin / window / string.c
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2c872e05 1/* @(#)string.c 8.1 (Berkeley) 6/6/93 */
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2/* $NetBSD: string.c,v 1.10 2009/04/14 08:50:06 lukem Exp $ */
3
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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.
abecab39 19 * 3. Neither the name of the University nor the names of its contributors
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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
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36#include <stdio.h>
37#include <stdlib.h>
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38#include <string.h>
39#define EXTERN
40#include "window_string.h"
41#undef EXTERN
984263bc 42
984263bc 43char *
abecab39 44str_cpy(const char *s)
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45{
46 char *str;
abecab39 47 char *p;
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48
49 str = p = str_alloc(strlen(s) + 1);
50 if (p == 0)
51 return 0;
abecab39 52 while ((*p++ = *s++))
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53 ;
54 return str;
55}
56
57char *
abecab39 58str_ncpy(const char *s, int n)
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59{
60 int l = strlen(s);
61 char *str;
abecab39 62 char *p;
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63
64 if (n > l)
65 n = l;
66 str = p = str_alloc(n + 1);
67 if (p == 0)
68 return 0;
69 while (--n >= 0)
70 *p++ = *s++;
71 *p = 0;
72 return str;
73}
74
75char *
abecab39 76str_itoa(int i)
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77{
78 char buf[30];
79
abecab39 80 (void) snprintf(buf, sizeof(buf), "%d", i);
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81 return str_cpy(buf);
82}
83
84char *
abecab39 85str_cat(const char *s1, const char *s2)
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86{
87 char *str;
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88 char *p;
89 const char *q;
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90
91 str = p = str_alloc(strlen(s1) + strlen(s2) + 1);
92 if (p == 0)
93 return 0;
abecab39 94 for (q = s1; (*p++ = *q++);)
984263bc 95 ;
abecab39 96 for (q = s2, p--; (*p++ = *q++);)
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97 ;
98 return str;
99}
100
101/*
102 * match s against p.
103 * s can be a prefix of p with at least min characters.
104 */
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105int
106str_match(const char *s, const char *p, int min)
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107{
108 for (; *s && *p && *s == *p; s++, p++, min--)
109 ;
abecab39 110 return *s == *p || (*s == 0 && min <= 0);
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111}
112
113#ifdef STR_DEBUG
114char *
abecab39 115str_alloc(size_t l)
984263bc 116{
abecab39 117 struct string *s;
984263bc 118
abecab39 119 s = (struct string *) malloc(l + str_offset);
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120 if (s == 0)
121 return 0;
122 if (str_head.s_forw == 0)
123 str_head.s_forw = str_head.s_back = &str_head;
124 s->s_forw = str_head.s_forw;
125 s->s_back = &str_head;
126 str_head.s_forw = s;
127 s->s_forw->s_back = s;
128 return s->s_data;
129}
130
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131void
132str_free(char *str)
984263bc 133{
abecab39 134 struct string *s;
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135
136 for (s = str_head.s_forw; s != &str_head && s->s_data != str;
137 s = s->s_forw)
138 ;
139 if (s == &str_head)
140 abort();
141 s->s_back->s_forw = s->s_forw;
142 s->s_forw->s_back = s->s_back;
143 free((char *)s);
144}
145#endif