diff options
Diffstat (limited to 'vendor/github.com/karalabe/hid/wchar.go')
| -rw-r--r-- | vendor/github.com/karalabe/hid/wchar.go | 227 |
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 000000000..d103beff5 --- /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 +} |