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author | Ben Cheng <bccheng@google.com> | 2012-10-01 10:30:31 -0700 |
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committer | Ben Cheng <bccheng@google.com> | 2012-10-01 10:30:31 -0700 |
commit | 82bcbebce43f0227f506d75a5b764b6847041bae (patch) | |
tree | fe9f8597b48a430c4daeb5123e3e8eb28e6f9da9 /gcc-4.7/libiberty/strstr.c | |
parent | 3c052de3bb16ac53b6b6ed659ec7557eb84c7590 (diff) | |
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Initial check-in of gcc 4.7.2.
Change-Id: I4a2f5a921c21741a0e18bda986d77e5f1bef0365
Diffstat (limited to 'gcc-4.7/libiberty/strstr.c')
-rw-r--r-- | gcc-4.7/libiberty/strstr.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/gcc-4.7/libiberty/strstr.c b/gcc-4.7/libiberty/strstr.c new file mode 100644 index 000000000..60902ea40 --- /dev/null +++ b/gcc-4.7/libiberty/strstr.c @@ -0,0 +1,41 @@ +/* Simple implementation of strstr for systems without it. + This function is in the public domain. */ + +/* + +@deftypefn Supplemental char* strstr (const char *@var{string}, const char *@var{sub}) + +This function searches for the substring @var{sub} in the string +@var{string}, not including the terminating null characters. A pointer +to the first occurrence of @var{sub} is returned, or @code{NULL} if the +substring is absent. If @var{sub} points to a string with zero +length, the function returns @var{string}. + +@end deftypefn + + +*/ + + +/* FIXME: The above description is ANSI compiliant. This routine has not + been validated to comply with it. -fnf */ + +#include <stddef.h> + +extern char *strchr (const char *, int); +extern int strncmp (const void *, const void *, size_t); +extern size_t strlen (const char *); + +char * +strstr (const char *s1, const char *s2) +{ + const char *p = s1; + const size_t len = strlen (s2); + + for (; (p = strchr (p, *s2)) != 0; p++) + { + if (strncmp (p, s2, len) == 0) + return (char *)p; + } + return (0); +} |