2 * Copyright (C) 2004-2007 Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (C) 1999-2001, 2003 Internet Software Consortium.
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
10 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
11 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
12 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
13 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
14 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
15 * PERFORMANCE OF THIS SOFTWARE.
18 /* $Id: string.c,v 1.20 2007/06/19 23:47:17 tbox Exp $ */
27 #include <isc/print.h>
28 #include <isc/region.h>
29 #include <isc/string.h>
32 static char digits
[] = "0123456789abcdefghijklmnoprstuvwxyz";
35 isc_string_touint64(char *source
, char **end
, int base
) {
37 isc_uint64_t overflow
;
42 if ((base
< 0) || (base
== 1) || (base
> 36)) {
47 while (*s
!= 0 && isascii(*s
&0xff) && isspace(*s
&0xff))
49 if (*s
== '+' /* || *s == '-' */)
52 if (*s
== '0' && (*(s
+1) == 'X' || *(s
+1) == 'x')) {
68 while ((c
= *s
) != 0) {
71 if ((o
= strchr(digits
, c
)) == NULL
) {
76 if ((o
- digits
) >= base
) {
87 if ((tmp
+ (o
- digits
)) < tmp
) {
99 isc_string_copy(char *target
, size_t size
, const char *source
) {
102 if (strlcpy(target
, source
, size
) >= size
) {
103 memset(target
, ISC_STRING_MAGIC
, size
);
104 return (ISC_R_NOSPACE
);
107 ENSURE(strlen(target
) < size
);
109 return (ISC_R_SUCCESS
);
113 isc_string_copy_truncate(char *target
, size_t size
, const char *source
) {
116 strlcpy(target
, source
, size
);
118 ENSURE(strlen(target
) < size
);
122 isc_string_append(char *target
, size_t size
, const char *source
) {
124 REQUIRE(strlen(target
) < size
);
126 if (strlcat(target
, source
, size
) >= size
) {
127 memset(target
, ISC_STRING_MAGIC
, size
);
128 return (ISC_R_NOSPACE
);
131 ENSURE(strlen(target
) < size
);
133 return (ISC_R_SUCCESS
);
137 isc_string_append_truncate(char *target
, size_t size
, const char *source
) {
139 REQUIRE(strlen(target
) < size
);
141 strlcat(target
, source
, size
);
143 ENSURE(strlen(target
) < size
);
147 isc_string_printf(char *target
, size_t size
, const char *format
, ...) {
153 va_start(args
, format
);
154 n
= vsnprintf(target
, size
, format
, args
);
158 memset(target
, ISC_STRING_MAGIC
, size
);
159 return (ISC_R_NOSPACE
);
162 ENSURE(strlen(target
) < size
);
164 return (ISC_R_SUCCESS
);
168 isc_string_printf_truncate(char *target
, size_t size
, const char *format
, ...) {
174 va_start(args
, format
);
175 n
= vsnprintf(target
, size
, format
, args
);
178 ENSURE(strlen(target
) < size
);
182 isc_string_regiondup(isc_mem_t
*mctx
, const isc_region_t
*source
) {
185 REQUIRE(mctx
!= NULL
);
186 REQUIRE(source
!= NULL
);
188 target
= (char *) isc_mem_allocate(mctx
, source
->length
+ 1);
189 if (target
!= NULL
) {
190 memcpy(source
->base
, target
, source
->length
);
191 target
[source
->length
] = '\0';
198 isc_string_separate(char **stringp
, const char *delim
) {
199 char *string
= *stringp
;
207 for (s
= string
; (sc
= *s
) != '\0'; s
++)
208 for (d
= delim
; (dc
= *d
) != '\0'; d
++)
219 isc_string_strlcpy(char *dst
, const char *src
, size_t size
)
225 /* Copy as many bytes as will fit */
226 if (n
!= 0U && --n
!= 0U) {
228 if ((*d
++ = *s
++) == 0)
233 /* Not enough room in dst, add NUL and traverse rest of src */
236 *d
= '\0'; /* NUL-terminate dst */
241 return(s
- src
- 1); /* count does not include NUL */
245 isc_string_strlcat(char *dst
, const char *src
, size_t size
)
252 /* Find the end of dst and adjust bytes left but don't go past end */
253 while (n
-- != 0U && *d
!= '\0')
259 return(dlen
+ strlen(s
));
269 return(dlen
+ (s
- src
)); /* count does not include NUL */