Annotation of mandoc/xstd.c, Revision 1.4
1.4 ! kristaps 1: /* $Id: xstd.c,v 1.3 2009/01/17 16:15:27 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:
1.1 kristaps 36: int
37: xstrcmp(const char *p1, const char *p2)
38: {
39:
40: return(0 == strcmp(p1, p2));
41: }
42:
43: int
44: xstrlcat(char *dst, const char *src, size_t sz)
45: {
46:
47: return(strlcat(dst, src, sz) < sz);
48: }
49:
50: int
51: xstrlcpy(char *dst, const char *src, size_t sz)
52: {
53:
54: return(strlcpy(dst, src, sz) < sz);
55: }
56:
57: void *
58: xcalloc(size_t num, size_t sz)
59: {
60: void *p;
61:
62: if (NULL == (p = calloc(num, sz)))
63: err(EXIT_FAILURE, "calloc");
64: return(p);
65: }
66:
67: char *
68: xstrdup(const char *p)
69: {
70: char *pp;
71:
72: if (NULL == (pp = strdup(p)))
73: err(EXIT_FAILURE, "strdup");
74: return(pp);
75: }
76:
1.3 kristaps 77: int
78: xstrlcats(char *buf, const struct mdoc_node *n, size_t sz)
79: {
80: char *p;
81:
82: assert(sz > 0);
83: assert(buf);
84: *buf = 0;
85:
86: for ( ; n; n = n->next) {
87: assert(MDOC_TEXT == n->type);
88: p = n->data.text.string;
89: if ( ! xstrlcat(buf, p, sz))
90: return(0);
91: if (n->next && ! xstrlcat(buf, " ", sz))
92: return(0);
93: }
94:
95: return(1);
96: }
97:
1.2 kristaps 98: #ifdef __linux__
99: /* $OpenBSD: strlcat.c,v 1.13 2005/08/08 08:05:37 espie Exp $ */
100:
101: /*
102: * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
103: *
104: * Permission to use, copy, modify, and distribute this software for any
105: * purpose with or without fee is hereby granted, provided that the above
106: * copyright notice and this permission notice appear in all copies.
107: *
108: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
109: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
110: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
111: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
112: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
113: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
114: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
115: */
116:
117: #include <sys/types.h>
118: #include <string.h>
119:
120:
121: size_t
122: strlcat(char *dst, const char *src, size_t siz)
123: {
124: char *d = dst;
125: const char *s = src;
126: size_t n = siz;
127: size_t dlen;
128:
129: /* Find the end of dst and adjust bytes left but don't go past end */
130: while (n-- != 0 && *d != '\0')
131: d++;
132: dlen = d - dst;
133: n = siz - dlen;
134:
135: if (n == 0)
136: return(dlen + strlen(s));
137: while (*s != '\0') {
138: if (n != 1) {
139: *d++ = *s;
140: n--;
141: }
142: s++;
143: }
144: *d = '\0';
145:
146: return(dlen + (s - src)); /* count does not include NUL */
147: }
148:
149: size_t
150: strlcpy(char *dst, const char *src, size_t siz)
151: {
152: char *d = dst;
153: const char *s = src;
154: size_t n = siz;
155:
156: /* Copy as many bytes as will fit */
157: if (n != 0) {
158: while (--n != 0) {
159: if ((*d++ = *s++) == '\0')
160: break;
161: }
162: }
163:
164: /* Not enough room in dst, add NUL and traverse rest of src */
165: if (n == 0) {
166: if (siz != 0)
167: *d = '\0'; /* NUL-terminate dst */
168: while (*s++)
169: ;
170: }
171:
172: return(s - src - 1); /* count does not include NUL */
173: }
174: #endif
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