iconv-go/iconv.go

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/*
Wraps the iconv API present on most systems, which allows for conversion
of bytes from one encoding to another. This package additionally provides
some convenient interface implementations like a Reader and Writer.
*/
package iconv
/*
#include <errno.h>
*/
import "C"
import "os"
// Alias os.Error for convenience
type Error os.Error
// Error codes returned from iconv functions
var (
E2BIG Error = os.Errno(int(C.E2BIG))
EBADF Error = os.Errno(int(C.EBADF))
EINVAL Error = os.Errno(int(C.EINVAL))
EILSEQ Error = os.Errno(int(C.EILSEQ))
ENOMEM Error = os.Errno(int(C.ENOMEM))
)
// All in one Convert method, rather than requiring the construction of an iconv.Converter
func Convert(input []byte, output []byte, fromEncoding string, toEncoding string) (bytesRead int, bytesWritten int, err Error) {
// create a temporary converter
converter, err := NewConverter(fromEncoding, toEncoding)
if err == nil {
// call converter's Convert
bytesRead, bytesWritten, err = converter.Convert(input, output)
if err == nil {
var shiftBytesWritten int
// call Convert with a nil input to generate any end shift sequences
_, shiftBytesWritten, err = converter.Convert(nil, output[bytesWritten:])
// add shift bytes to total bytes
bytesWritten += shiftBytesWritten
}
// close the converter
converter.Close()
}
return
}
// All in one ConvertString method, rather than requiring the construction of an iconv.Converter
func ConvertString(input string, fromEncoding string, toEncoding string) (output string, err Error) {
// create a temporary converter
converter, err := NewConverter(fromEncoding, toEncoding)
if err == nil {
// convert the string
output, err = converter.ConvertString(input)
// close the converter
converter.Close()
}
return
}