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Make sure that for systems where the string functions are actually macros

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that we undefine the macro before using its name in the definition. This
can happen on Linux if _GNU_SOURCE is defined.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17071 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Spencer 2004-10-17 00:17:54 +00:00
parent 71d3778c0b
commit 2bf0292432
1 changed files with 24 additions and 0 deletions
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24
runtime/GCCLibraries/libc/string.c
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@ -7,12 +7,18 @@
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
#ifdef strlen
#undef strlen
#endif
size_t strlen(const char *Str) { size_t strlen(const char *Str) {
size_t Count = 0; size_t Count = 0;
while (*Str) { ++Count; ++Str; } while (*Str) { ++Count; ++Str; }
return Count; return Count;
} }
#ifdef strdup
#undef strdup
#endif
char *strdup(const char *str) { char *strdup(const char *str) {
size_t Len = strlen(str); size_t Len = strlen(str);
char *Result = (char*)malloc((Len+1)*sizeof(char)); char *Result = (char*)malloc((Len+1)*sizeof(char));
@ -20,6 +26,9 @@ char *strdup(const char *str) {
return Result; return Result;
} }
#ifdef strndup
#undef strndup
#endif
char *strndup(const char *str, size_t n) { char *strndup(const char *str, size_t n) {
size_t Len = strlen(str); size_t Len = strlen(str);
if (Len > n) Len = n; if (Len > n) Len = n;
@ -29,24 +38,36 @@ char *strndup(const char *str, size_t n) {
return Result; return Result;
} }
#ifdef strcpy
#undef strcpy
#endif
char *strcpy(char *s1, const char *s2) { char *strcpy(char *s1, const char *s2) {
char *dest = s1; char *dest = s1;
while ((*s1++ = *s2++)); while ((*s1++ = *s2++));
return dest; return dest;
} }
#ifdef strncpy
#undef strncpy
#endif
char *strncpy(char *s1, const char *s2, size_t n) { char *strncpy(char *s1, const char *s2, size_t n) {
char *dest = s1; char *dest = s1;
while (n-- && (*s1++ = *s2++)); while (n-- && (*s1++ = *s2++));
return dest; return dest;
} }
#ifdef strcat
#undef strcat
#endif
char *strcat(char *s1, const char *s2) { char *strcat(char *s1, const char *s2) {
strcpy(s1+strlen(s1), s2); strcpy(s1+strlen(s1), s2);
return s1; return s1;
} }
#ifdef strcmp
#undef strcmp
#endif
/* Compare S1 and S2, returning less than, equal to or /* Compare S1 and S2, returning less than, equal to or
greater than zero if S1 is lexicographically less than, greater than zero if S1 is lexicographically less than,
equal to or greater than S2. */ equal to or greater than S2. */
@ -136,6 +157,9 @@ void *memset (void *dstpp, int c, size_t len) {
} }
#endif #endif
#ifdef memcpy
#undef memcpy
#endif
void *memcpy(void *dstpp, const void *srcpp, size_t len) { void *memcpy(void *dstpp, const void *srcpp, size_t len) {
char *dstp = (char*)dstpp; char *dstp = (char*)dstpp;
char *srcp = (char*) srcpp; char *srcp = (char*) srcpp;