[Mini-OS] Add strrchr()

Add strrchr(), useful e.g. for grabbing the last part of a xenbus
path.

Signed-off-by: Samuel Thibault <samuel.thibault@citrix.com>

diff --git a/extras/mini-os/include/lib.h b/extras/mini-os/include/lib.h
index 809c429789c9e90f5c8b0a0cfa879480e00c4d96..1673d88424f79613a5ad07f69c2e349faa04b39c 100644 (file)
--- a/extras/mini-os/include/lib.h
+++ b/extras/mini-os/include/lib.h
@@ -87,6 +87,7 @@ void  *memset(void *s,int c, size_t count);
 size_t strnlen(const char *s, size_t count);
 size_t strlen(const char *s);
 char  *strchr(const char *s, int c);
+char  *strrchr(const char *s, int c);
 char  *strstr(const char *s1, const char *s2);
 char * strcat(char * dest, const char * src);
 char  *strdup(const char *s);

diff --git a/extras/mini-os/lib/string.c b/extras/mini-os/lib/string.c
index c52ae43a89f79cbd6ae4be8911aea88c39a5dd7a..019c9224472a6b584b108b2f644020a53a2cb776 100644 (file)
--- a/extras/mini-os/lib/string.c
+++ b/extras/mini-os/lib/string.c
@@ -140,6 +140,15 @@ char * strchr(const char * s, int c)
         return (char *)s;
 }
 
+char * strrchr(const char * s, int c)
+{
+        const char *res;
+        for(; *s != '\0'; ++s)
+                if (*s == (char) c)
+                        res = s;
+        return (char *)res;
+}
+
 char * strstr(const char * s1,const char * s2)
 {
         int l1, l2;