#ifndef RUBY_TRANSCODE_DATA_H

#define RUBY_TRANSCODE_DATA_H 1

#define WORDINDEX_SHIFT_BITS 2

#define WORDINDEX2INFO(widx) ((widx) << WORDINDEX_SHIFT_BITS)

#define INFO2WORDINDEX(info) ((info) >> WORDINDEX_SHIFT_BITS)

#define BYTE_LOOKUP_BASE(bl) ((bl)[0])

#define BYTE_LOOKUP_INFO(bl) ((bl)[1])

#define PType (unsigned int)

#define NOMAP (PType 0x01) /* direct map */

#define ONEbt (0x02) /* one byte payload */

#define TWObt (0x03) /* two bytes payload */

#define THREEbt (0x05) /* three bytes payload */

#define FOURbt (0x06) /* four bytes payload, UTF-8 only, macros start at getBT0 */

#define INVALID (PType 0x07) /* invalid byte sequence */

#define UNDEF (PType 0x09) /* legal but undefined */

#define ZERObt (PType 0x0A) /* zero bytes of payload, i.e. remove */

#define FUNii (PType 0x0B) /* function from info to info */

#define FUNsi (PType 0x0D) /* function from start to info */

#define FUNio (PType 0x0E) /* function from info to output */

#define FUNso (PType 0x0F) /* function from start to output */

#define STR1 (PType 0x11) /* string 4 <= len <= 259 bytes: 1byte length + content */

#define GB4bt (PType 0x12) /* GB18030 four bytes payload */

#define FUNsio (PType 0x13) /* function from start and info to output */

#define STR1_LENGTH(byte_addr) (unsigned int)(*(byte_addr) + 4)

#define STR1_BYTEINDEX(w) ((w) >> 6)

#define makeSTR1(bi) (((bi) << 6) | STR1)

#define makeSTR1LEN(len) ((len)-4)

#define o1(b1) (PType((((unsigned char)(b1))<<8)|ONEbt))

#define o2(b1,b2) (PType((((unsigned char)(b1))<<8)|(((unsigned char)(b2))<<16)|TWObt))

#define o3(b1,b2,b3) (PType(((((unsigned char)(b1))<<8)|(((unsigned char)(b2))<<16)|(((unsigned int)(unsigned char)(b3))<<24)|THREEbt)&0xffffffffU))

#define o4(b0,b1,b2,b3) (PType(((((unsigned char)(b1))<<8)|(((unsigned char)(b2))<<16)|(((unsigned char)(b3))<<24)|((((unsigned char)(b0))&0x07)<<5)|FOURbt)&0xffffffffU))

#define g4(b0,b1,b2,b3) (PType(((((unsigned char)(b0))<<8)|(((unsigned char)(b2))<<16)|((((unsigned char)(b1))&0x0f)<<24)|((((unsigned int)(unsigned char)(b3))&0x0f)<<28)|GB4bt)&0xffffffffU))

#define funsio(diff) (PType((((unsigned int)(diff))<<8)|FUNsio))

#define getBT1(a) ((unsigned char)((a)>> 8))

#define getBT2(a) ((unsigned char)((a)>>16))

#define getBT3(a) ((unsigned char)((a)>>24))

#define getBT0(a) (((unsigned char)((a)>> 5)&0x07)|0xF0) /* for UTF-8 only!!! */

#define getGB4bt0(a) ((unsigned char)((a)>> 8))

#define getGB4bt1(a) ((((unsigned char)((a)>>24))&0x0F)|0x30)

#define getGB4bt2(a) ((unsigned char)((a)>>16))

#define getGB4bt3(a) ((((unsigned char)((a)>>28))&0x0F)|0x30)

#define o2FUNii(b1,b2) (PType((((unsigned char)(b1))<<8)|(((unsigned char)(b2))<<16)|FUNii))

#define ONETRAIL /* legal but undefined if one more trailing UTF-8 */

#define TWOTRAIL /* legal but undefined if two more trailing UTF-8 */

#define THREETRAIL /* legal but undefined if three more trailing UTF-8 */

typedef enum {

asciicompat_converter, /* ASCII-compatible -> ASCII-compatible */

asciicompat_decoder, /* ASCII-incompatible -> ASCII-compatible */

asciicompat_encoder /* ASCII-compatible -> ASCII-incompatible */

/* ASCII-incompatible -> ASCII-incompatible is intentionally omitted. */

} mrb_transcoder_asciicompat_type_t;

typedef struct mrb_transcoder mrb_transcoder;

struct mrb_transcoder {

};

void mrb_declare_transcoder(mrb_state *mrb, const char *enc1, const char *enc2, const char *lib);

void mrb_register_transcoder(mrb_state *mrb, const mrb_transcoder *);

#endif /* RUBY_TRANSCODE_DATA_H */