Annotation of mandoc/xstd.c, Revision 1.6
1.6 ! kristaps 1: /* $Id: xstd.c,v 1.5 2009/01/20 22:55:46 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
38: xstrncmp(const char *p1, const char *p2, size_t sz)
39: {
40:
41: return(0 == strncmp(p1, p2, sz));
42: }
43:
1.1 kristaps 44: int
45: xstrcmp(const char *p1, const char *p2)
46: {
47:
48: return(0 == strcmp(p1, p2));
49: }
50:
51: int
52: xstrlcat(char *dst, const char *src, size_t sz)
53: {
54:
55: return(strlcat(dst, src, sz) < sz);
56: }
57:
58: int
59: xstrlcpy(char *dst, const char *src, size_t sz)
60: {
61:
62: return(strlcpy(dst, src, sz) < sz);
63: }
64:
65: void *
1.6 ! kristaps 66: xrealloc(void *ptr, size_t sz)
! 67: {
! 68: void *p;
! 69:
! 70: if (NULL == (p = realloc(ptr, sz)))
! 71: err(EXIT_FAILURE, "realloc");
! 72: return(p);
! 73: }
! 74:
! 75: void *
1.1 kristaps 76: xcalloc(size_t num, size_t sz)
77: {
78: void *p;
79:
80: if (NULL == (p = calloc(num, sz)))
81: err(EXIT_FAILURE, "calloc");
82: return(p);
83: }
84:
85: char *
86: xstrdup(const char *p)
87: {
88: char *pp;
89:
90: if (NULL == (pp = strdup(p)))
91: err(EXIT_FAILURE, "strdup");
92: return(pp);
93: }
94:
1.3 kristaps 95: int
96: xstrlcats(char *buf, const struct mdoc_node *n, size_t sz)
97: {
98: char *p;
99:
100: assert(sz > 0);
101: assert(buf);
102: *buf = 0;
103:
104: for ( ; n; n = n->next) {
105: assert(MDOC_TEXT == n->type);
106: p = n->data.text.string;
107: if ( ! xstrlcat(buf, p, sz))
108: return(0);
109: if (n->next && ! xstrlcat(buf, " ", sz))
110: return(0);
111: }
112:
113: return(1);
114: }
115:
1.2 kristaps 116: #ifdef __linux__
117: /* $OpenBSD: strlcat.c,v 1.13 2005/08/08 08:05:37 espie Exp $ */
118:
119: /*
120: * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
121: *
122: * Permission to use, copy, modify, and distribute this software for any
123: * purpose with or without fee is hereby granted, provided that the above
124: * copyright notice and this permission notice appear in all copies.
125: *
126: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
127: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
128: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
129: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
130: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
131: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
132: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
133: */
134:
135: #include <sys/types.h>
136: #include <string.h>
137:
138:
139: size_t
140: strlcat(char *dst, const char *src, size_t siz)
141: {
142: char *d = dst;
143: const char *s = src;
144: size_t n = siz;
145: size_t dlen;
146:
147: /* Find the end of dst and adjust bytes left but don't go past end */
148: while (n-- != 0 && *d != '\0')
149: d++;
150: dlen = d - dst;
151: n = siz - dlen;
152:
153: if (n == 0)
154: return(dlen + strlen(s));
155: while (*s != '\0') {
156: if (n != 1) {
157: *d++ = *s;
158: n--;
159: }
160: s++;
161: }
162: *d = '\0';
163:
164: return(dlen + (s - src)); /* count does not include NUL */
165: }
166:
167: size_t
168: strlcpy(char *dst, const char *src, size_t siz)
169: {
170: char *d = dst;
171: const char *s = src;
172: size_t n = siz;
173:
174: /* Copy as many bytes as will fit */
175: if (n != 0) {
176: while (--n != 0) {
177: if ((*d++ = *s++) == '\0')
178: break;
179: }
180: }
181:
182: /* Not enough room in dst, add NUL and traverse rest of src */
183: if (n == 0) {
184: if (siz != 0)
185: *d = '\0'; /* NUL-terminate dst */
186: while (*s++)
187: ;
188: }
189:
190: return(s - src - 1); /* count does not include NUL */
191: }
192: #endif
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