From: Rusty Russell <rusty@rustcorp.com.au>
To: torvalds@transmeta.com
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH] Module rewrite 5/20: strcspn
Date: Wed, 25 Sep 2002 13:00:50 +1000 [thread overview]
Message-ID: <20020925032201.92B992C0F6@lists.samba.org> (raw)
Name: strcspn patch
Author: Rusty Russell
Status: Experimental
D: This patch implements a generic strcspn.
diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal .17889-2.5.36-param.pre/include/linux/string.h .17889-2.5.36-param/include/linux/string.h
--- .17889-2.5.36-param.pre/include/linux/string.h 2002-06-06 21:38:40.000000000 +1000
+++ .17889-2.5.36-param/include/linux/string.h 2002-09-19 16:15:20.000000000 +1000
@@ -15,7 +15,7 @@ extern "C" {
extern char * strpbrk(const char *,const char *);
extern char * strsep(char **,const char *);
extern __kernel_size_t strspn(const char *,const char *);
-
+extern __kernel_size_t strcspn(const char *,const char *);
/*
* Include machine specific inline routines
diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal .17889-2.5.36-param.pre/lib/string.c .17889-2.5.36-param/lib/string.c
--- .17889-2.5.36-param.pre/lib/string.c 2002-05-24 15:20:35.000000000 +1000
+++ .17889-2.5.36-param/lib/string.c 2002-09-19 16:15:20.000000000 +1000
@@ -272,6 +272,29 @@ size_t strspn(const char *s, const char
}
#endif
+/**
+ * strcspn - Calculate the length of the initial substring of @s which does
+ * not contain letters in @reject
+ * @s: The string to be searched
+ * @reject: The string to avoid
+ */
+size_t strcspn(const char *s, const char *reject)
+{
+ const char *p;
+ const char *r;
+ size_t count = 0;
+
+ for (p = s; *p != '\0'; ++p) {
+ for (r = reject; *r != '\0'; ++r) {
+ if (*p == *r)
+ return count;
+ }
+ ++count;
+ }
+
+ return count;
+}
+
#ifndef __HAVE_ARCH_STRPBRK
/**
* strpbrk - Find the first occurrence of a set of characters
--
Anyone who quotes me in their sig is an idiot. -- Rusty Russell.
reply other threads:[~2002-09-25 3:16 UTC|newest]
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