62 lines
1.3 KiB
Go
62 lines
1.3 KiB
Go
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package util
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import "C"
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import (
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"errors"
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"fmt"
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"log"
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"strings"
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"unsafe"
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"golang.org/x/text/encoding/charmap"
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)
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// ErrFileNotFound Windows error
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var ErrFileNotFound = errors.New("file not found")
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// ErrInvalidHandle Windows error
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var ErrInvalidHandle = errors.New("invalid handle")
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// UnknownError unhandled Windows error
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type UnknownError struct {
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Code uint64
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}
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func (e UnknownError) Error() string {
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return fmt.Sprintf("unknown error code: %d", e.Code)
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}
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// HandleLastError converts C.GetLastError() to golang error
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func HandleLastError(code uint64) error {
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switch code {
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case 2: // ERROR_FILE_NOT_FOUND
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return ErrFileNotFound
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case 6: // ERROR_INVALID_HANDLE
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return ErrInvalidHandle
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default:
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return UnknownError{Code: code}
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}
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}
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func goStringFromPtr(ptr unsafe.Pointer, len int) string {
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s := C.GoStringN((*C.char)(ptr), C.int(len))
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return s[:strings.IndexByte(s, 0)]
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}
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// DecodeCharPtr decodes ISO8859_1 string to UTF-8
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func DecodeCharPtr(ptr unsafe.Pointer, len int) string {
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s := goStringFromPtr(ptr, len)
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ds, err := decodeISO8859_1(s)
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if err != nil {
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log.Fatalf("TODO: failed to decode: %v", err)
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}
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return ds
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}
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var isodecoder = charmap.ISO8859_1.NewDecoder()
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func decodeISO8859_1(in string) (string, error) {
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return isodecoder.String(in)
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}
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