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- // 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.
-
- // +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])
- }
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