58 lines
959 B
Plaintext
58 lines
959 B
Plaintext
// Copyright 2009, 2010 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.
|
|
|
|
package runtime
|
|
#include "runtime.h"
|
|
#define charntorune(pv, str, len) __go_get_rune(str, len, pv)
|
|
|
|
enum
|
|
{
|
|
Runeself = 0x80,
|
|
};
|
|
|
|
func stringiter(s String, k int32) (retk int32) {
|
|
int32 l, n;
|
|
|
|
if(k >= s.__length) {
|
|
// retk=0 is end of iteration
|
|
retk = 0;
|
|
goto out;
|
|
}
|
|
|
|
l = s.__data[k];
|
|
if(l < Runeself) {
|
|
retk = k+1;
|
|
goto out;
|
|
}
|
|
|
|
// multi-char rune
|
|
n = charntorune(&l, s.__data+k, s.__length-k);
|
|
retk = k + (n ? n : 1);
|
|
|
|
out:
|
|
}
|
|
|
|
func stringiter2(s String, k int32) (retk int32, retv int32) {
|
|
int32 n;
|
|
|
|
if(k >= s.__length) {
|
|
// retk=0 is end of iteration
|
|
retk = 0;
|
|
retv = 0;
|
|
goto out;
|
|
}
|
|
|
|
retv = s.__data[k];
|
|
if(retv < Runeself) {
|
|
retk = k+1;
|
|
goto out;
|
|
}
|
|
|
|
// multi-char rune
|
|
n = charntorune(&retv, s.__data+k, s.__length-k);
|
|
retk = k + (n ? n : 1);
|
|
|
|
out:
|
|
}
|