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#ifndef __UNICONV_H__
#define __UNICONV_H__
#include <stddef.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* the conversion descriptor
*/
struct _uniconv;
typedef struct _uniconv uniconv_t;
#define UNICONV_SUCCESS (0)
#define UNICONV_EILSEQ (-1)
#define UNICONV_E2BIG (-2)
#define UNICONV_EINVAL (-3)
#define UNICONV_EBADF (-4)
/**
* open a descriptor for converting /from/ charset to /to/ charset
*
* @param from the from charset
* @param to the to charset
*
* @return a conversion descriptor, %NULL in case of error.
*/
uniconv_t*
uniconv_open(const char *to, const char *from);
/**
* peform charset converting
*
* If both inbuf and outbuf set to %NULL, then the descriptor
* state will be reset. If only the inbuf set to %NULL, then the
* descriptor will reset its shift state and write any pending
* data to outbuf.
*
* @param inbuf a pointer to input buffer
* @param inleft the size of input buffer
* @param outbuf a pointer to output buffer
* @param outleft the size of output buffer
*
* @return the number of characters converted in a non-reversible
* way during this call.
*
* In case of error, it returns
*
* UNICONV_E2BIG There is not sufficient room at *outbuf.
* UNICONV_EILSEQ An invalid multibyte sequence has been encountered in the input.
* UNICONV_EINVAL An incomplete multibyte sequence has been encountered in the input.
*
*/
int
uniconv_conv(uniconv_t *uc,
const char **inbuf,
size_t *inleft,
char **outbuf,
size_t *outleft);
/**
* close the conversion descriptor
*/
void
uniconv_close(uniconv_t *uc);
#ifdef __cplusplus
}
#endif
#endif
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