diff options
Diffstat (limited to 'lib/libc/string/memchr.3')
| -rw-r--r-- | lib/libc/string/memchr.3 | 31 |
1 files changed, 28 insertions, 3 deletions
diff --git a/lib/libc/string/memchr.3 b/lib/libc/string/memchr.3 index d82d859..5cbaf6c 100644 --- a/lib/libc/string/memchr.3 +++ b/lib/libc/string/memchr.3 @@ -32,7 +32,7 @@ .\" @(#)memchr.3 8.1 (Berkeley) 6/4/93 .\" $FreeBSD$ .\" -.Dd June 4, 1993 +.Dd April 9, 2008 .Dt MEMCHR 3 .Os .Sh NAME @@ -44,6 +44,8 @@ .In string.h .Ft void * .Fn memchr "const void *b" "int c" "size_t len" +.Ft void * +.Fn memrchr "const void *b" "int c" "size_t len" .Sh DESCRIPTION The .Fn memchr @@ -53,11 +55,22 @@ locates the first occurrence of (converted to an unsigned char) in string .Fa b . +.Pp +The +.Fn memrchr +function behaves like +.Fn memchr , +except that it locates the last occurrence of +.Fa c +in string +.Fa b . .Sh RETURN VALUES The .Fn memchr -function -returns a pointer to the byte located, +and +.Fn memrchr +functions +return a pointer to the byte located, or NULL if no such byte exists within .Fa len bytes. @@ -77,3 +90,15 @@ The function conforms to .St -isoC . +.Pp +The +.Fn memrchr +function is a GNU extension and conforms to no standard. +.Sh HISTORY +The +.Fn memrchr +function first appeared in GNU libc 2.1.91, this implementation +first appeared in +.Fx 8.0 , +coming from +.Ox 4.3 . |
