76 lines
1.1 KiB
Plaintext
76 lines
1.1 KiB
Plaintext
// Copyright 2009, 2010 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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package runtime
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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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#include "go-string.h"
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#define charntorune(pv, str, len) __go_get_rune(str, len, pv)
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intgo
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runtime_findnull(const byte *s)
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{
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if(s == nil)
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return 0;
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return __builtin_strlen((const char*) s);
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}
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String
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runtime_gostringnocopy(const byte *str)
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{
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String s;
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s.str = str;
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s.len = runtime_findnull(str);
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return s;
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}
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enum
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{
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Runeself = 0x80,
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};
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func stringiter(s String, k int) (retk int) {
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int32 l;
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if(k >= s.len) {
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// retk=0 is end of iteration
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retk = 0;
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goto out;
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}
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l = s.str[k];
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if(l < Runeself) {
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retk = k+1;
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goto out;
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}
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// multi-char rune
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retk = k + charntorune(&l, s.str+k, s.len-k);
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out:
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}
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func stringiter2(s String, k int) (retk int, retv int32) {
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if(k >= s.len) {
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// retk=0 is end of iteration
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retk = 0;
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retv = 0;
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goto out;
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}
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retv = s.str[k];
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if(retv < Runeself) {
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retk = k+1;
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goto out;
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}
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// multi-char rune
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retk = k + charntorune(&retv, s.str+k, s.len-k);
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out:
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}
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