62 lines
1.4 KiB
Go
62 lines
1.4 KiB
Go
|
// Copyright 2016 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.
|
||
|
|
|
||
|
|
//go:build icu
|
||
|
|
|
||
|
|
package cases
|
||
|
|
|
||
|
|
// Ideally these functions would be defined in a test file, but go test doesn't
|
||
|
|
// allow CGO in tests. The build tag should ensure either way that these
|
||
|
|
// functions will not end up in the package.
|
||
|
|
|
||
|
|
// TODO: Ensure that the correct ICU version is set.
|
||
|
|
|
||
|
|
/*
|
||
|
|
#cgo LDFLAGS: -licui18n.57 -licuuc.57
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <unicode/ustring.h>
|
||
|
|
#include <unicode/utypes.h>
|
||
|
|
#include <unicode/localpointer.h>
|
||
|
|
#include <unicode/ucasemap.h>
|
||
|
|
*/
|
||
|
|
import "C"
|
||
|
|
|
||
|
|
import "unsafe"
|
||
|
|
|
||
|
|
func doICU(tag, caser, input string) string {
|
||
|
|
err := C.UErrorCode(0)
|
||
|
|
loc := C.CString(tag)
|
||
|
|
cm := C.ucasemap_open(loc, C.uint32_t(0), &err)
|
||
|
|
|
||
|
|
buf := make([]byte, len(input)*4)
|
||
|
|
dst := (*C.char)(unsafe.Pointer(&buf[0]))
|
||
|
|
src := C.CString(input)
|
||
|
|
|
||
|
|
cn := C.int32_t(0)
|
||
|
|
|
||
|
|
switch caser {
|
||
|
|
case "fold":
|
||
|
|
cn = C.ucasemap_utf8FoldCase(cm,
|
||
|
|
dst, C.int32_t(len(buf)),
|
||
|
|
src, C.int32_t(len(input)),
|
||
|
|
&err)
|
||
|
|
case "lower":
|
||
|
|
cn = C.ucasemap_utf8ToLower(cm,
|
||
|
|
dst, C.int32_t(len(buf)),
|
||
|
|
src, C.int32_t(len(input)),
|
||
|
|
&err)
|
||
|
|
case "upper":
|
||
|
|
cn = C.ucasemap_utf8ToUpper(cm,
|
||
|
|
dst, C.int32_t(len(buf)),
|
||
|
|
src, C.int32_t(len(input)),
|
||
|
|
&err)
|
||
|
|
case "title":
|
||
|
|
cn = C.ucasemap_utf8ToTitle(cm,
|
||
|
|
dst, C.int32_t(len(buf)),
|
||
|
|
src, C.int32_t(len(input)),
|
||
|
|
&err)
|
||
|
|
}
|
||
|
|
return string(buf[:cn])
|
||
|
|
}
|