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-rw-r--r--sysdeps/generic/strsep.c23
1 files changed, 21 insertions, 2 deletions
diff --git a/sysdeps/generic/strsep.c b/sysdeps/generic/strsep.c
index d17e53a..b2c7e90 100644
--- a/sysdeps/generic/strsep.c
+++ b/sysdeps/generic/strsep.c
@@ -27,8 +27,27 @@ __strsep (char **stringp, const char *delim)
if (! begin || *begin == '\0')
return NULL;
- /* Find the end of the token. */
- end = strpbrk (begin, delim);
+ /* A frequent case is when the delimiter string contains only one
+ character. Here we don't need to call the expensive `strpbrk'
+ function and instead work using `strchr'. */
+ if (delim[0] == '\0' || delim[1] == '\0')
+ {
+ char ch = delim[0];
+
+ if (ch == '\0')
+ end = NULL;
+ else
+ {
+ while (*begin == ch)
+ ++begin;
+
+ end = strchr (begin, delim[0]);
+ }
+ }
+ else
+ /* Find the end of the token. */
+ end = strpbrk (begin, delim);
+
if (end)
{
/* Terminate the token and set *STRINGP past NUL character. */