/*
 * multibytecodec.h: Common Multibyte Codec Implementation
 *
 * Written by Hye-Shik Chang <perky@FreeBSD.org>
 */

#ifndef _PYTHON_MULTIBYTECODEC_H_
#define _PYTHON_MULTIBYTECODEC_H_
#ifdef __cplusplus
extern "C" {
#endif

#ifdef uint16_t
typedef uint16_t ucs2_t, DBCHAR;
#else
typedef unsigned short ucs2_t, DBCHAR;
#endif

typedef union {
 void *p;
 int i;
 unsigned char c[8];
 ucs2_t u2[4];
 Py_UCS4 u4[2];
} MultibyteCodec_State;

typedef int (*mbcodec_init)(const void *config);
typedef Py_ssize_t (*mbencode_func)(MultibyteCodec_State *state,
 const void *config,
 int kind, void *data,
 Py_ssize_t *inpos, Py_ssize_t inlen,
 unsigned char **outbuf, Py_ssize_t outleft,
 int flags);
typedef int (*mbencodeinit_func)(MultibyteCodec_State *state,
 const void *config);
typedef Py_ssize_t (*mbencodereset_func)(MultibyteCodec_State *state,
 const void *config,
 unsigned char **outbuf, Py_ssize_t outleft);
typedef Py_ssize_t (*mbdecode_func)(MultibyteCodec_State *state,
 const void *config,
 const unsigned char **inbuf, Py_ssize_t inleft,
 _PyUnicodeWriter *writer);
typedef int (*mbdecodeinit_func)(MultibyteCodec_State *state,
 const void *config);
typedef Py_ssize_t (*mbdecodereset_func)(MultibyteCodec_State *state,
 const void *config);

typedef struct {
 const char *encoding;
 const void *config;
 mbcodec_init codecinit;
 mbencode_func encode;
 mbencodeinit_func encinit;
 mbencodereset_func encreset;
 mbdecode_func decode;
 mbdecodeinit_func decinit;
 mbdecodereset_func decreset;
} MultibyteCodec;

typedef struct {
 PyObject_HEAD
 MultibyteCodec *codec;
} MultibyteCodecObject;

#define MultibyteCodec_Check(op) ((op)->ob_type == &MultibyteCodec_Type)

#define _MultibyteStatefulCodec_HEAD \
 PyObject_HEAD \
 MultibyteCodec *codec; \
 MultibyteCodec_State state; \
 PyObject *errors;
typedef struct {
 _MultibyteStatefulCodec_HEAD
} MultibyteStatefulCodecContext;

#define MAXENCPENDING 2
#define _MultibyteStatefulEncoder_HEAD \
 _MultibyteStatefulCodec_HEAD \
 PyObject *pending;
typedef struct {
 _MultibyteStatefulEncoder_HEAD
} MultibyteStatefulEncoderContext;

#define MAXDECPENDING 8
#define _MultibyteStatefulDecoder_HEAD \
 _MultibyteStatefulCodec_HEAD \
 unsigned char pending[MAXDECPENDING]; \
 Py_ssize_t pendingsize;
typedef struct {
 _MultibyteStatefulDecoder_HEAD
} MultibyteStatefulDecoderContext;

typedef struct {
 _MultibyteStatefulEncoder_HEAD
} MultibyteIncrementalEncoderObject;

typedef struct {
 _MultibyteStatefulDecoder_HEAD
} MultibyteIncrementalDecoderObject;

typedef struct {
 _MultibyteStatefulDecoder_HEAD
 PyObject *stream;
} MultibyteStreamReaderObject;

typedef struct {
 _MultibyteStatefulEncoder_HEAD
 PyObject *stream;
} MultibyteStreamWriterObject;

/* positive values for illegal sequences */
#define MBERR_TOOSMALL (-1) /* insufficient output buffer space */
#define MBERR_TOOFEW (-2) /* incomplete input buffer */
#define MBERR_INTERNAL (-3) /* internal runtime error */
#define MBERR_EXCEPTION (-4) /* an exception has been raised */

#define ERROR_STRICT (PyObject *)(1)
#define ERROR_IGNORE (PyObject *)(2)
#define ERROR_REPLACE (PyObject *)(3)
#define ERROR_ISCUSTOM(p) ((p) < ERROR_STRICT || ERROR_REPLACE < (p))
#define ERROR_DECREF(p) \
 do { \
 if (p != NULL && ERROR_ISCUSTOM(p)) \
 Py_DECREF(p); \
 } while (0);

#define MBENC_FLUSH 0x0001 /* encode all characters encodable */
#define MBENC_MAX MBENC_FLUSH

#define PyMultibyteCodec_CAPSULE_NAME "multibytecodec.__map_*"


#ifdef __cplusplus
}
#endif
#endif