68 lines
2.1 KiB
Go
68 lines
2.1 KiB
Go
|
//go:build use_icu_normalization
|
||
|
|
// +build use_icu_normalization
|
||
|
|
|
||
|
|
package normalization
|
||
|
|
|
||
|
|
// #cgo CFLAGS: -O2
|
||
|
|
// #cgo LDFLAGS: -licuio -licui18n -licuuc -licudata
|
||
|
|
// #include <unicode/unorm2.h>
|
||
|
|
// #include <unicode/ustring.h>
|
||
|
|
// #include <unicode/uversion.h>
|
||
|
|
// int icu_version() {
|
||
|
|
// UVersionInfo info;
|
||
|
|
// u_getVersion(info);
|
||
|
|
// return ((int)(info[0]) << 16) + info[1];
|
||
|
|
// }
|
||
|
|
// int normalize(char* name, int length, char* result) {
|
||
|
|
// UErrorCode ec = U_ZERO_ERROR;
|
||
|
|
// static const UNormalizer2* normalizer = NULL;
|
||
|
|
// if (normalizer == NULL) normalizer = unorm2_getNFDInstance(&ec);
|
||
|
|
// UChar dest[256]; // maximum claim name size is 255; we won't have more UTF16 chars than bytes
|
||
|
|
// int dest_len;
|
||
|
|
// u_strFromUTF8(dest, 256, &dest_len, name, length, &ec);
|
||
|
|
// if (U_FAILURE(ec) || dest_len == 0) return 0;
|
||
|
|
// UChar normalized[256];
|
||
|
|
// dest_len = unorm2_normalize(normalizer, dest, dest_len, normalized, 256, &ec);
|
||
|
|
// if (U_FAILURE(ec) || dest_len == 0) return 0;
|
||
|
|
// dest_len = u_strFoldCase(dest, 256, normalized, dest_len, U_FOLD_CASE_DEFAULT, &ec);
|
||
|
|
// if (U_FAILURE(ec) || dest_len == 0) return 0;
|
||
|
|
// u_strToUTF8(result, 512, &dest_len, dest, dest_len, &ec);
|
||
|
|
// return dest_len;
|
||
|
|
// }
|
||
|
|
import "C"
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
"unsafe"
|
||
|
|
)
|
||
|
|
|
||
|
|
func init() {
|
||
|
|
Normalize = normalizeICU
|
||
|
|
NormalizeTitle = "Normalizing strings via ICU. ICU version = " + IcuVersion()
|
||
|
|
}
|
||
|
|
|
||
|
|
func IcuVersion() string {
|
||
|
|
// TODO: we probably need to explode if it's not 63.2 as it affects consensus
|
||
|
|
result := C.icu_version()
|
||
|
|
return fmt.Sprintf("%d.%d", result>>16, result&0xffff)
|
||
|
|
}
|
||
|
|
|
||
|
|
func normalizeICU(value []byte) []byte {
|
||
|
|
if len(value) <= 0 {
|
||
|
|
return value
|
||
|
|
}
|
||
|
|
name := (*C.char)(unsafe.Pointer(&value[0]))
|
||
|
|
length := C.int(len(value))
|
||
|
|
|
||
|
|
// hopefully this is a stack alloc (but it may be a bit large for that):
|
||
|
|
var resultName [512]byte // inputs are restricted to 255 chars; it shouldn't expand too much past that
|
||
|
|
result := unsafe.Pointer(&resultName[0])
|
||
|
|
|
||
|
|
resultLength := C.normalize(name, length, (*C.char)(result))
|
||
|
|
if resultLength == 0 {
|
||
|
|
return value
|
||
|
|
}
|
||
|
|
|
||
|
|
// return resultName[0:resultLength] -- we want to shrink the result (not use a slice on 1024)
|
||
|
|
return C.GoBytes(result, resultLength)
|
||
|
|
}
|