This is Vladimir's update to last_char_is(). Since 'char *' is
the least common denominator, I modified it to use that (not const),
which will minimize the need for casting elsewhere.
diff --git a/libbb/last_char_is.c b/libbb/last_char_is.c
index b4bb7ec..36b695b 100644
--- a/libbb/last_char_is.c
+++ b/libbb/last_char_is.c
@@ -25,9 +25,12 @@
* underrun the buffer if the string length is 0. Also avoids a possible
* space-hogging inline of strlen() per usage.
*/
-int last_char_is(const char *s, const int c)
+char * last_char_is(char *s, int c)
{
- int l = strlen(s);
- if (l==0) return 0;
- return (s[l-1] == c);
+ char *sret = s+strlen(s)-1;
+ if (sret>=s && *sret == c) {
+ return sret;
+ } else {
+ return NULL;
+ }
}