31 lines
679 B
C
31 lines
679 B
C
/* go-strplus.c -- the go string append function.
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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 "runtime.h"
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#include "arch.h"
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#include "malloc.h"
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String
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__go_string_plus (String s1, String s2)
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{
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int len;
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byte *retdata;
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String ret;
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if (s1.len == 0)
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return s2;
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else if (s2.len == 0)
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return s1;
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len = s1.len + s2.len;
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retdata = runtime_mallocgc (len, FlagNoPointers, 1, 0);
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__builtin_memcpy (retdata, s1.str, s1.len);
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__builtin_memcpy (retdata + s1.len, s2.str, s2.len);
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ret.str = retdata;
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ret.len = len;
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return ret;
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}
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