diff options
Diffstat (limited to 'libgo/runtime/string.goc')
-rw-r--r-- | libgo/runtime/string.goc | 57 |
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: +} |