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/* go-strplus.c -- the go string append function.
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 "go-string.h"
#include "runtime.h"
#include "malloc.h"
struct __go_string
__go_string_plus (struct __go_string s1, struct __go_string s2)
{
int len;
unsigned char *retdata;
struct __go_string ret;
if (s1.__length == 0)
return s2;
else if (s2.__length == 0)
return s1;
len = s1.__length + s2.__length;
retdata = runtime_mallocgc (len, RefNoPointers, 1, 0);
__builtin_memcpy (retdata, s1.__data, s1.__length);
__builtin_memcpy (retdata + s1.__length, s2.__data, s2.__length);
ret.__data = retdata;
ret.__length = len;
return ret;
}
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