mirror of
https://gcc.gnu.org/git/gcc.git
synced 2024-11-25 11:54:01 +08:00
29 lines
759 B
C
29 lines
759 B
C
/* indexbyte.c -- implement bytes.IndexByte for Go.
|
|
|
|
Copyright 2009 The Go Authors. All rights reserved.
|
|
Use of this source code is governed by a BSD-style
|
|
license that can be found in the LICENSE file. */
|
|
|
|
#include <stddef.h>
|
|
|
|
#include "array.h"
|
|
|
|
/* This is in C so that the compiler can optimize it appropriately.
|
|
We deliberately don't split the stack in case it does call the
|
|
library function, which shouldn't need much stack space. */
|
|
|
|
int IndexByte (struct __go_open_array, char)
|
|
asm ("libgo_bytes.bytes.IndexByte")
|
|
__attribute__ ((no_split_stack));
|
|
|
|
int
|
|
IndexByte (struct __go_open_array s, char b)
|
|
{
|
|
char *p;
|
|
|
|
p = __builtin_memchr (s.__values, b, s.__count);
|
|
if (p == NULL)
|
|
return -1;
|
|
return p - (char *) s.__values;
|
|
}
|