4 * Copyright (C) 1991, 1992 Linus Torvalds
8 * stupid library routines.. The optimized versions should generally be found
9 * as inline code in <asm-xx/string.h>
11 * These are buggy as well..
14 #include <linux/types.h>
15 #include <linux/string.h>
16 #include <linux/ctype.h>
18 #ifndef __HAVE_ARCH_STRNICMP
19 int strnicmp(const char *s1
, const char *s2
, size_t len
)
21 /* Yes, Virginia, it had better be unsigned */
41 return (int)c1
- (int)c2
;
45 char * ___strtok
= NULL
;
47 #ifndef __HAVE_ARCH_STRCPY
48 char * strcpy(char * dest
,const char *src
)
52 while ((*dest
++ = *src
++) != '\0')
58 #ifndef __HAVE_ARCH_STRNCPY
59 char * strncpy(char * dest
,const char *src
,size_t count
)
63 while (count
-- && (*dest
++ = *src
++) != '\0')
70 #ifndef __HAVE_ARCH_STRCAT
71 char * strcat(char * dest
, const char * src
)
77 while ((*dest
++ = *src
++) != '\0')
84 #ifndef __HAVE_ARCH_STRNCAT
85 char * strncat(char *dest
, const char *src
, size_t count
)
92 while ((*dest
++ = *src
++)) {
104 #ifndef __HAVE_ARCH_STRCMP
105 int strcmp(const char * cs
,const char * ct
)
107 register signed char __res
;
110 if ((__res
= *cs
- *ct
++) != 0 || !*cs
++)
118 #ifndef __HAVE_ARCH_STRNCMP
119 int strncmp(const char * cs
,const char * ct
,size_t count
)
121 register signed char __res
= 0;
124 if ((__res
= *cs
- *ct
++) != 0 || !*cs
++)
133 #ifndef __HAVE_ARCH_STRCHR
134 char * strchr(const char * s
, int c
)
136 for(; *s
!= (char) c
; ++s
)
143 #ifndef __HAVE_ARCH_STRRCHR
144 char * strrchr(const char * s
, int c
)
146 const char *p
= s
+ strlen(s
);
155 #ifndef __HAVE_ARCH_STRLEN
156 size_t strlen(const char * s
)
160 for (sc
= s
; *sc
!= '\0'; ++sc
)
166 #ifndef __HAVE_ARCH_STRNLEN
167 size_t strnlen(const char * s
, size_t count
)
171 for (sc
= s
; count
-- && *sc
!= '\0'; ++sc
)
177 #ifndef __HAVE_ARCH_STRSPN
178 size_t strspn(const char *s
, const char *accept
)
184 for (p
= s
; *p
!= '\0'; ++p
) {
185 for (a
= accept
; *a
!= '\0'; ++a
) {
198 #ifndef __HAVE_ARCH_STRPBRK
199 char * strpbrk(const char * cs
,const char * ct
)
201 const char *sc1
,*sc2
;
203 for( sc1
= cs
; *sc1
!= '\0'; ++sc1
) {
204 for( sc2
= ct
; *sc2
!= '\0'; ++sc2
) {
213 #ifndef __HAVE_ARCH_STRTOK
214 char * strtok(char * s
,const char * ct
)
218 sbegin
= s
? s
: ___strtok
;
222 sbegin
+= strspn(sbegin
,ct
);
223 if (*sbegin
== '\0') {
227 send
= strpbrk( sbegin
, ct
);
228 if (send
&& *send
!= '\0')
235 #ifndef __HAVE_ARCH_MEMSET
236 void * memset(void * s
,char c
,size_t count
)
238 char *xs
= (char *) s
;
247 #ifndef __HAVE_ARCH_BCOPY
248 char * bcopy(const char * src
, char * dest
, int count
)
259 #ifndef __HAVE_ARCH_MEMCPY
260 void * memcpy(void * dest
,const void *src
,size_t count
)
262 char *tmp
= (char *) dest
, *s
= (char *) src
;
271 #ifndef __HAVE_ARCH_MEMMOVE
272 void * memmove(void * dest
,const void *src
,size_t count
)
283 tmp
= (char *) dest
+ count
;
284 s
= (char *) src
+ count
;
293 #ifndef __HAVE_ARCH_MEMCMP
294 int memcmp(const void * cs
,const void * ct
,size_t count
)
296 const unsigned char *su1
, *su2
;
299 for( su1
= cs
, su2
= ct
; 0 < count
; ++su1
, ++su2
, count
--)
300 if ((res
= *su1
- *su2
) != 0)
307 * find the first occurrence of byte 'c', or 1 past the area if none
309 #ifndef __HAVE_ARCH_MEMSCAN
310 void * memscan(void * addr
, int c
, size_t size
)
312 unsigned char * p
= (unsigned char *) addr
;
324 #ifndef __HAVE_ARCH_STRSTR
325 char * strstr(const char * s1
,const char * s2
)
335 if (!memcmp(s1
,s2
,l2
))