43 lines
1.1 KiB
C
43 lines
1.1 KiB
C
/* indexbyte.c -- implement bytes.IndexByte for Go.
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Copyright 2009 The Go Authors. All rights reserved.
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Use of this source code is governed by a BSD-style
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license that can be found in the LICENSE file. */
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#include <stddef.h>
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#include "array.h"
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/* This is in C so that the compiler can optimize it appropriately.
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We deliberately don't split the stack in case it does call the
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library function, which shouldn't need much stack space. */
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int IndexByte (struct __go_open_array, char)
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asm ("libgo_bytes.bytes.IndexByte")
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__attribute__ ((no_split_stack));
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int
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IndexByte (struct __go_open_array s, char b)
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{
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char *p;
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p = __builtin_memchr (s.__values, b, s.__count);
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if (p == NULL)
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return -1;
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return p - (char *) s.__values;
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}
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/* Comparison. */
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_Bool Equal (struct __go_open_array a, struct __go_open_array b)
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asm ("libgo_bytes.bytes.Equal")
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__attribute__ ((no_split_stack));
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_Bool
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Equal (struct __go_open_array a, struct __go_open_array b)
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{
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if (a.__count != b.__count)
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return 0;
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return __builtin_memcmp (a.__values, b.__values, a.__count) == 0;
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}
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