mirror of
https://github.com/bminor/binutils-gdb.git
synced 2025-11-16 04:24:43 +00:00
c671850a83
Import the following commits from GCC as of r16-614-g9d039eff453f77: 31dd621796f libiberty: add ldirname function f3d07779fdb libiberty: Append <libgen.h> to AC_CHECK_DECLS [PR119218]. 90183362524 libiberty, gcc: Add memrchr to libiberty and use it [PR119283]. 43717ee9064 libiberty: Fix off-by-one when collecting range expression
34 lines
883 B
C
34 lines
883 B
C
/*
|
|
|
|
@deftypefn Supplemental void* memrchr (const void *@var{s}, int @var{c}, @
|
|
size_t @var{n})
|
|
|
|
This function searches memory for the character @var{c} in reverse order,
|
|
starting at @code{*@var{s}+@var{n}-1} . The search only ends with
|
|
the first occurrence of @var{c}, or when the start us reached; in particular,
|
|
a null character does not terminate the search. If the character @var{c} is
|
|
found within @var{length} characters of @code{*@var{s}}, a pointer
|
|
to the character is returned. If @var{c} is not found, then @code{NULL} is
|
|
returned.
|
|
|
|
@end deftypefn
|
|
|
|
*/
|
|
|
|
#include <ansidecl.h>
|
|
#include <stddef.h>
|
|
|
|
void *
|
|
memrchr (const void *src_void, int c, size_t length)
|
|
{
|
|
if (length == 0)
|
|
return NULL;
|
|
|
|
const unsigned char *p = (const unsigned char*)src_void;
|
|
p += length;
|
|
while (*--p != (unsigned char)c)
|
|
if (src_void == p)
|
|
return NULL;
|
|
return (void *)p;
|
|
}
|