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path: root/vendor/github.com/karalabe/hid/wchar.go
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-rw-r--r--vendor/github.com/karalabe/hid/wchar.go227
1 files changed, 227 insertions, 0 deletions
diff --git a/vendor/github.com/karalabe/hid/wchar.go b/vendor/github.com/karalabe/hid/wchar.go
new file mode 100644
index 0000000..d103bef
--- /dev/null
+++ b/vendor/github.com/karalabe/hid/wchar.go
@@ -0,0 +1,227 @@
+// This file is https://github.com/orofarne/gowchar/blob/master/gowchar.go
+//
+// It was vendored inline to work around CGO limitations that don't allow C types
+// to directly cross package API boundaries.
+//
+// The vendored file is licensed under the 3-clause BSD license, according to:
+// https://github.com/orofarne/gowchar/blob/master/LICENSE
+
+// +build !ios
+// +build linux darwin windows
+
+package hid
+
+/*
+#include <wchar.h>
+
+const size_t SIZEOF_WCHAR_T = sizeof(wchar_t);
+
+void gowchar_set (wchar_t *arr, int pos, wchar_t val)
+{
+ arr[pos] = val;
+}
+
+wchar_t gowchar_get (wchar_t *arr, int pos)
+{
+ return arr[pos];
+}
+*/
+import "C"
+
+import (
+ "fmt"
+ "unicode/utf16"
+ "unicode/utf8"
+)
+
+var sizeofWcharT C.size_t = C.size_t(C.SIZEOF_WCHAR_T)
+
+func stringToWcharT(s string) (*C.wchar_t, C.size_t) {
+ switch sizeofWcharT {
+ case 2:
+ return stringToWchar2(s) // Windows
+ case 4:
+ return stringToWchar4(s) // Unix
+ default:
+ panic(fmt.Sprintf("Invalid sizeof(wchar_t) = %v", sizeofWcharT))
+ }
+}
+
+func wcharTToString(s *C.wchar_t) (string, error) {
+ switch sizeofWcharT {
+ case 2:
+ return wchar2ToString(s) // Windows
+ case 4:
+ return wchar4ToString(s) // Unix
+ default:
+ panic(fmt.Sprintf("Invalid sizeof(wchar_t) = %v", sizeofWcharT))
+ }
+}
+
+func wcharTNToString(s *C.wchar_t, size C.size_t) (string, error) {
+ switch sizeofWcharT {
+ case 2:
+ return wchar2NToString(s, size) // Windows
+ case 4:
+ return wchar4NToString(s, size) // Unix
+ default:
+ panic(fmt.Sprintf("Invalid sizeof(wchar_t) = %v", sizeofWcharT))
+ }
+}
+
+// Windows
+func stringToWchar2(s string) (*C.wchar_t, C.size_t) {
+ var slen int
+ s1 := s
+ for len(s1) > 0 {
+ r, size := utf8.DecodeRuneInString(s1)
+ if er, _ := utf16.EncodeRune(r); er == '\uFFFD' {
+ slen += 1
+ } else {
+ slen += 2
+ }
+ s1 = s1[size:]
+ }
+ slen++ // \0
+ res := C.malloc(C.size_t(slen) * sizeofWcharT)
+ var i int
+ for len(s) > 0 {
+ r, size := utf8.DecodeRuneInString(s)
+ if r1, r2 := utf16.EncodeRune(r); r1 != '\uFFFD' {
+ C.gowchar_set((*C.wchar_t)(res), C.int(i), C.wchar_t(r1))
+ i++
+ C.gowchar_set((*C.wchar_t)(res), C.int(i), C.wchar_t(r2))
+ i++
+ } else {
+ C.gowchar_set((*C.wchar_t)(res), C.int(i), C.wchar_t(r))
+ i++
+ }
+ s = s[size:]
+ }
+ C.gowchar_set((*C.wchar_t)(res), C.int(slen-1), C.wchar_t(0)) // \0
+ return (*C.wchar_t)(res), C.size_t(slen)
+}
+
+// Unix
+func stringToWchar4(s string) (*C.wchar_t, C.size_t) {
+ slen := utf8.RuneCountInString(s)
+ slen++ // \0
+ res := C.malloc(C.size_t(slen) * sizeofWcharT)
+ var i int
+ for len(s) > 0 {
+ r, size := utf8.DecodeRuneInString(s)
+ C.gowchar_set((*C.wchar_t)(res), C.int(i), C.wchar_t(r))
+ s = s[size:]
+ i++
+ }
+ C.gowchar_set((*C.wchar_t)(res), C.int(slen-1), C.wchar_t(0)) // \0
+ return (*C.wchar_t)(res), C.size_t(slen)
+}
+
+// Windows
+func wchar2ToString(s *C.wchar_t) (string, error) {
+ var i int
+ var res string
+ for {
+ ch := C.gowchar_get(s, C.int(i))
+ if ch == 0 {
+ break
+ }
+ r := rune(ch)
+ i++
+ if !utf16.IsSurrogate(r) {
+ if !utf8.ValidRune(r) {
+ err := fmt.Errorf("Invalid rune at position %v", i)
+ return "", err
+ }
+ res += string(r)
+ } else {
+ ch2 := C.gowchar_get(s, C.int(i))
+ r2 := rune(ch2)
+ r12 := utf16.DecodeRune(r, r2)
+ if r12 == '\uFFFD' {
+ err := fmt.Errorf("Invalid surrogate pair at position %v", i-1)
+ return "", err
+ }
+ res += string(r12)
+ i++
+ }
+ }
+ return res, nil
+}
+
+// Unix
+func wchar4ToString(s *C.wchar_t) (string, error) {
+ var i int
+ var res string
+ for {
+ ch := C.gowchar_get(s, C.int(i))
+ if ch == 0 {
+ break
+ }
+ r := rune(ch)
+ if !utf8.ValidRune(r) {
+ err := fmt.Errorf("Invalid rune at position %v", i)
+ return "", err
+ }
+ res += string(r)
+ i++
+ }
+ return res, nil
+}
+
+// Windows
+func wchar2NToString(s *C.wchar_t, size C.size_t) (string, error) {
+ var i int
+ var res string
+ N := int(size)
+ for i < N {
+ ch := C.gowchar_get(s, C.int(i))
+ if ch == 0 {
+ break
+ }
+ r := rune(ch)
+ i++
+ if !utf16.IsSurrogate(r) {
+ if !utf8.ValidRune(r) {
+ err := fmt.Errorf("Invalid rune at position %v", i)
+ return "", err
+ }
+
+ res += string(r)
+ } else {
+ if i >= N {
+ err := fmt.Errorf("Invalid surrogate pair at position %v", i-1)
+ return "", err
+ }
+ ch2 := C.gowchar_get(s, C.int(i))
+ r2 := rune(ch2)
+ r12 := utf16.DecodeRune(r, r2)
+ if r12 == '\uFFFD' {
+ err := fmt.Errorf("Invalid surrogate pair at position %v", i-1)
+ return "", err
+ }
+ res += string(r12)
+ i++
+ }
+ }
+ return res, nil
+}
+
+// Unix
+func wchar4NToString(s *C.wchar_t, size C.size_t) (string, error) {
+ var i int
+ var res string
+ N := int(size)
+ for i < N {
+ ch := C.gowchar_get(s, C.int(i))
+ r := rune(ch)
+ if !utf8.ValidRune(r) {
+ err := fmt.Errorf("Invalid rune at position %v", i)
+ return "", err
+ }
+ res += string(r)
+ i++
+ }
+ return res, nil
+}