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f8e3eee673
Also add the older variants described there, and the character set used by the "VT100" font (old and new). Since RFC 1345 defines "macintosh" to refer to the currency-sign variant of Mac OS Roman, update our table to match. [originally from svn r2403]
140 lines
3.9 KiB
C
140 lines
3.9 KiB
C
/*
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* charset.h - header file for general character set conversion
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* routines.
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*/
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#ifndef charset_charset_h
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#define charset_charset_h
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#include <stddef.h>
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/*
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* Enumeration that lists all the multibyte or single-byte
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* character sets known to this library.
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*/
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typedef enum {
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CS_NONE, /* used for reporting errors, etc */
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CS_ISO8859_1,
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CS_ISO8859_1_X11, /* X font encoding with VT100 glyphs */
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CS_ISO8859_2,
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CS_ISO8859_3,
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CS_ISO8859_4,
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CS_ISO8859_5,
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CS_ISO8859_6,
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CS_ISO8859_7,
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CS_ISO8859_8,
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CS_ISO8859_9,
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CS_ISO8859_10,
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CS_ISO8859_11,
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CS_ISO8859_13,
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CS_ISO8859_14,
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CS_ISO8859_15,
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CS_ISO8859_16,
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CS_CP437,
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CS_CP850,
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CS_CP1250,
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CS_CP1251,
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CS_CP1252,
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CS_CP1253,
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CS_CP1254,
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CS_CP1255,
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CS_CP1256,
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CS_CP1257,
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CS_CP1258,
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CS_KOI8_R,
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CS_KOI8_U,
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CS_MAC_ROMAN,
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CS_MAC_TURKISH,
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CS_MAC_CROATIAN,
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CS_MAC_ICELAND,
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CS_MAC_ROMANIAN,
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CS_MAC_GREEK,
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CS_MAC_CYRILLIC,
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CS_MAC_THAI,
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CS_MAC_CENTEURO,
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CS_MAC_SYMBOL,
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CS_MAC_DINGBATS,
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CS_MAC_ROMAN_OLD,
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CS_MAC_CROATIAN_OLD,
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CS_MAC_ICELAND_OLD,
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CS_MAC_ROMANIAN_OLD,
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CS_MAC_GREEK_OLD,
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CS_MAC_CYRILLIC_OLD,
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CS_MAC_UKRAINE,
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CS_MAC_VT100,
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CS_MAC_VT100_OLD,
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CS_VISCII,
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CS_HP_ROMAN8,
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CS_DEC_MCS,
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CS_UTF8
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} charset_t;
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typedef struct {
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unsigned long s0;
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} charset_state;
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/*
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* Routine to convert a MB/SB character set to Unicode.
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*
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* This routine accepts some number of bytes, updates a state
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* variable, and outputs some number of Unicode characters. There
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* are no guarantees. You can't even guarantee that at most one
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* Unicode character will be output per byte you feed in; for
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* example, suppose you're reading UTF-8, you've seen E1 80, and
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* then you suddenly see FE. Now you need to output _two_ error
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* characters - one for the incomplete sequence E1 80, and one for
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* the completely invalid UTF-8 byte FE.
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*
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* Returns the number of wide characters output; will never output
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* more than the size of the buffer (as specified on input).
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* Advances the `input' pointer and decrements `inlen', to indicate
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* how far along the input string it got.
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*
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* The sequence of `errlen' wide characters pointed to by `errstr'
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* will be used to indicate a conversion error. If `errstr' is
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* NULL, `errlen' will be ignored, and the library will choose
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* something sensible to do on its own. For Unicode, this will be
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* U+FFFD (REPLACEMENT CHARACTER).
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*/
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int charset_to_unicode(char **input, int *inlen, wchar_t *output, int outlen,
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int charset, charset_state *state,
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const wchar_t *errstr, int errlen);
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/*
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* Routine to convert Unicode to an MB/SB character set.
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*
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* This routine accepts some number of Unicode characters, updates
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* a state variable, and outputs some number of bytes.
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*
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* Returns the number of bytes characters output; will never output
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* more than the size of the buffer (as specified on input), and
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* will never output a partial MB character. Advances the `input'
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* pointer and decrements `inlen', to indicate how far along the
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* input string it got.
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*
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* The sequence of `errlen' characters pointed to by `errstr' will
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* be used to indicate a conversion error. If `errstr' is NULL,
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* `errlen' will be ignored, and the library will choose something
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* sensible to do on its own (which will vary depending on the
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* output charset).
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*/
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int charset_from_unicode(wchar_t **input, int *inlen, char *output, int outlen,
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int charset, charset_state *state,
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const char *errstr, int errlen);
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/*
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* Convert X11 encoding names to and from our charset identifiers.
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*/
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const char *charset_to_xenc(int charset);
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int charset_from_xenc(const char *name);
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/*
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* Convert MIME encoding names to and from our charset identifiers.
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*/
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const char *charset_to_mimeenc(int charset);
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int charset_from_mimeenc(const char *name);
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#endif /* charset_charset_h */
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