31 lines
790 B
C
31 lines
790 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 "go-string.h"
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#include "runtime.h"
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#include "malloc.h"
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struct __go_string
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__go_string_plus (struct __go_string s1, struct __go_string s2)
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{
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int len;
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unsigned char *retdata;
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struct __go_string ret;
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if (s1.__length == 0)
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return s2;
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else if (s2.__length == 0)
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return s1;
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len = s1.__length + s2.__length;
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retdata = runtime_mallocgc (len, FlagNoPointers, 1, 0);
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__builtin_memcpy (retdata, s1.__data, s1.__length);
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__builtin_memcpy (retdata + s1.__length, s2.__data, s2.__length);
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ret.__data = retdata;
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ret.__length = len;
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return ret;
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}
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