Annotation of mandoc/xstd.c, Revision 1.9
1.9 ! kristaps 1: /* $Id: xstd.c,v 1.8 2009/03/08 11:41:22 kristaps Exp $ */
1.1 kristaps 2: /*
3: * Copyright (c) 2008 Kristaps Dzonsons <kristaps@kth.se>
4: *
5: * Permission to use, copy, modify, and distribute this software for any
6: * purpose with or without fee is hereby granted, provided that the
7: * above copyright notice and this permission notice appear in all
8: * copies.
9: *
10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
11: * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
12: * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
13: * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
14: * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
15: * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
16: * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
17: * PERFORMANCE OF THIS SOFTWARE.
18: */
1.3 kristaps 19: #include <assert.h>
1.1 kristaps 20: #include <err.h>
21: #include <stdlib.h>
22: #include <string.h>
23:
24: #include "private.h"
25:
1.4 kristaps 26: /*
27: * Contains wrappers for common functions to simplify their general
28: * usage throughout this codebase.
29: */
30:
1.2 kristaps 31: #ifdef __linux__
32: extern size_t strlcat(char *, const char *, size_t);
33: extern size_t strlcpy(char *, const char *, size_t);
34: #endif
35:
1.5 kristaps 36:
37: int
1.1 kristaps 38: xstrcmp(const char *p1, const char *p2)
39: {
40:
41: return(0 == strcmp(p1, p2));
42: }
43:
44: int
45: xstrlcat(char *dst, const char *src, size_t sz)
46: {
47:
48: return(strlcat(dst, src, sz) < sz);
49: }
50:
51: int
52: xstrlcpy(char *dst, const char *src, size_t sz)
53: {
54:
55: return(strlcpy(dst, src, sz) < sz);
56: }
57:
58: void *
1.6 kristaps 59: xrealloc(void *ptr, size_t sz)
60: {
61: void *p;
62:
63: if (NULL == (p = realloc(ptr, sz)))
64: err(EXIT_FAILURE, "realloc");
65: return(p);
66: }
67:
68: void *
1.1 kristaps 69: xcalloc(size_t num, size_t sz)
70: {
71: void *p;
72:
73: if (NULL == (p = calloc(num, sz)))
74: err(EXIT_FAILURE, "calloc");
75: return(p);
76: }
77:
78: char *
79: xstrdup(const char *p)
80: {
81: char *pp;
82:
83: if (NULL == (pp = strdup(p)))
84: err(EXIT_FAILURE, "strdup");
85: return(pp);
86: }
87:
1.3 kristaps 88: int
1.7 kristaps 89: xstrlcpys(char *buf, const struct mdoc_node *n, size_t sz)
1.3 kristaps 90: {
91: char *p;
92:
93: assert(sz > 0);
94: assert(buf);
95: *buf = 0;
96:
97: for ( ; n; n = n->next) {
98: assert(MDOC_TEXT == n->type);
1.8 kristaps 99: p = n->string;
1.3 kristaps 100: if ( ! xstrlcat(buf, p, sz))
101: return(0);
102: if (n->next && ! xstrlcat(buf, " ", sz))
103: return(0);
104: }
105:
106: return(1);
107: }
108:
1.2 kristaps 109: #ifdef __linux__
110: /* $OpenBSD: strlcat.c,v 1.13 2005/08/08 08:05:37 espie Exp $ */
111:
112: /*
113: * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
114: *
115: * Permission to use, copy, modify, and distribute this software for any
116: * purpose with or without fee is hereby granted, provided that the above
117: * copyright notice and this permission notice appear in all copies.
118: *
119: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
120: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
121: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
122: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
123: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
124: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
125: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
126: */
127:
128: #include <sys/types.h>
129: #include <string.h>
130:
131:
132: size_t
133: strlcat(char *dst, const char *src, size_t siz)
134: {
135: char *d = dst;
136: const char *s = src;
137: size_t n = siz;
138: size_t dlen;
139:
140: /* Find the end of dst and adjust bytes left but don't go past end */
141: while (n-- != 0 && *d != '\0')
142: d++;
143: dlen = d - dst;
144: n = siz - dlen;
145:
146: if (n == 0)
147: return(dlen + strlen(s));
148: while (*s != '\0') {
149: if (n != 1) {
150: *d++ = *s;
151: n--;
152: }
153: s++;
154: }
155: *d = '\0';
156:
157: return(dlen + (s - src)); /* count does not include NUL */
158: }
159:
160: size_t
161: strlcpy(char *dst, const char *src, size_t siz)
162: {
163: char *d = dst;
164: const char *s = src;
165: size_t n = siz;
166:
167: /* Copy as many bytes as will fit */
168: if (n != 0) {
169: while (--n != 0) {
170: if ((*d++ = *s++) == '\0')
171: break;
172: }
173: }
174:
175: /* Not enough room in dst, add NUL and traverse rest of src */
176: if (n == 0) {
177: if (siz != 0)
178: *d = '\0'; /* NUL-terminate dst */
179: while (*s++)
180: ;
181: }
182:
183: return(s - src - 1); /* count does not include NUL */
184: }
185: #endif
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