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rb_transcoding. [ruby-dev:33234] * transcode_data.h (rb_transcoding): transcoder constified. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@15152 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
86 lines
3.6 KiB
C
86 lines
3.6 KiB
C
/**********************************************************************
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transcode_data.h -
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$Author$
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created at: Mon 10 Dec 2007 14:01:47 JST 2007
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Copyright (C) 2007 Martin Duerst
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**********************************************************************/
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#include "ruby/ruby.h"
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#ifndef RUBY_TRANSCODE_DATA_H
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#define RUBY_TRANSCODE_DATA_H 1
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typedef unsigned char base_element;
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typedef struct byte_lookup {
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const base_element *base;
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const struct byte_lookup *const *info;
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} BYTE_LOOKUP;
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#ifndef PType
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/* data file needs to treat this as a pointer, to remove warnings */
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#define PType (const BYTE_LOOKUP *)
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#endif
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#define NOMAP (PType 0x01) /* single byte direct map */
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#define ONEbt (0x02) /* one byte payload */
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#define TWObt (0x03) /* two bytes payload */
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#define THREEbt (0x05) /* three bytes payload */
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#define FOURbt (0x06) /* four bytes payload, UTF-8 only, macros start at getBT0 */
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#define INVALID (PType 0x07) /* invalid byte sequence */
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#define UNDEF (PType 0x09) /* legal but undefined */
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#define ZERObt (PType 0x0A) /* zero bytes of payload, i.e. remove */
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#define FUNii (PType 0x0B) /* function from info to info */
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#define FUNsi (PType 0x0D) /* function from start to info */
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#define FUNio (PType 0x0E) /* function from info to output */
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#define FUNso (PType 0x0F) /* function from start to output */
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#define o1(b1) (PType((((unsigned char)(b1))<<8)|ONEbt))
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#define o2(b1,b2) (PType((((unsigned char)(b1))<<8)|(((unsigned char)(b2))<<16)|TWObt))
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#define o3(b1,b2,b3) (PType((((unsigned char)(b1))<<8)|(((unsigned char)(b2))<<16)|(((unsigned char)(b3))<<24)|THREEbt))
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#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))
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#define getBT1(a) (((a)>> 8)&0xFF)
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#define getBT2(a) (((a)>>16)&0xFF)
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#define getBT3(a) (((a)>>24)&0xFF)
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#define getBT0(a) ((((a)>> 5)&0x07)|0xF0) /* for UTF-8 only!!! */
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#define o2FUNii(b1,b2) (PType((((unsigned char)(b1))<<8)|(((unsigned char)(b2))<<16)|FUNii))
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/* do we need these??? maybe not, can be done with simple tables */
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#define ONETRAIL /* legal but undefined if one more trailing UTF-8 */
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#define TWOTRAIL /* legal but undefined if two more trailing UTF-8 */
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#define THREETRAIL /* legal but undefined if three more trailing UTF-8 */
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/* dynamic structure, one per conversion (similar to iconv_t) */
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/* may carry conversion state (e.g. for iso-2022-jp) */
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typedef struct rb_transcoding {
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const struct rb_transcoder *transcoder;
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VALUE ruby_string_dest; /* the String used as the conversion destination,
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or NULL if something else is being converted */
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unsigned char *(*flush_func)(struct rb_transcoding*, int, int);
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} rb_transcoding;
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/* static structure, one per supported encoding pair */
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typedef struct rb_transcoder {
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const char *from_encoding;
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const char *to_encoding;
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const BYTE_LOOKUP *conv_tree_start;
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int max_output;
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int from_utf8;
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void (*preprocessor)(unsigned char**, unsigned char**, unsigned char*, unsigned char*, struct rb_transcoding *);
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void (*postprocessor)(unsigned char**, unsigned char**, unsigned char*, unsigned char*, struct rb_transcoding *);
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VALUE (*func_ii)(VALUE); /* info -> info */
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VALUE (*func_si)(const unsigned char *); /* start -> info */
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int (*func_io)(VALUE, const unsigned char*); /* info -> output */
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int (*func_so)(const unsigned char*, unsigned char*); /* start -> output */
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} rb_transcoder;
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void rb_declare_transcoder(const char *enc1, const char *enc2, const char *lib);
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void rb_register_transcoder(const rb_transcoder *);
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#endif /* RUBY_TRANSCODE_DATA_H */
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