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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /libgo/runtime/string.goc
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Diffstat (limited to 'libgo/runtime/string.goc')
-rw-r--r--libgo/runtime/string.goc57
1 files changed, 57 insertions, 0 deletions
diff --git a/libgo/runtime/string.goc b/libgo/runtime/string.goc
new file mode 100644
index 000000000..332277c52
--- /dev/null
+++ b/libgo/runtime/string.goc
@@ -0,0 +1,57 @@
+// 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:
+}