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tidy-html5/src/streamio.c

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/* streamio.c -- handles character stream I/O
(c) 1998-2008 (W3C) MIT, ERCIM, Keio University
See tidy.h for the copyright notice.
Wrapper around Tidy input source and output sink
that calls appropriate interfaces, and applies
necessary char encoding transformations: to/from
ISO-10646 and/or UTF-8.
*/
#include <stdio.h>
#include <errno.h>
#include "streamio.h"
#include "tidy-int.h"
#include "lexer.h"
#include "message.h"
#include "utf8.h"
#include "tmbstr.h"
/************************
** Forward Declarations
************************/
static uint ReadCharFromStream( StreamIn* in );
static uint ReadByte( StreamIn* in );
static void UngetByte( StreamIn* in, uint byteValue );
static void PutByte( uint byteValue, StreamOut* out );
static void EncodeWin1252( uint c, StreamOut* out );
static void EncodeMacRoman( uint c, StreamOut* out );
static void EncodeIbm858( uint c, StreamOut* out );
static void EncodeLatin0( uint c, StreamOut* out );
static uint DecodeIbm850(uint c);
static uint DecodeLatin0(uint c);
static uint PopChar( StreamIn *in );
/******************************
** Static (duration) Globals
******************************/
static StreamOut stderrStreamOut =
{
ASCII,
FSM_ASCII,
DEFAULT_NL_CONFIG,
FileIO,
{ 0, TY_(filesink_putByte) }
};
static StreamOut stdoutStreamOut =
{
ASCII,
FSM_ASCII,
DEFAULT_NL_CONFIG,
FileIO,
{ 0, TY_(filesink_putByte) }
};
StreamOut* TY_(StdErrOutput)(void)
{
if ( stderrStreamOut.sink.sinkData == 0 )
stderrStreamOut.sink.sinkData = stderr;
return &stderrStreamOut;
}
void TY_(ReleaseStreamOut)( TidyDocImpl *doc, StreamOut* out )
{
if ( out && out != &stderrStreamOut && out != &stdoutStreamOut )
{
if ( out->iotype == FileIO )
fclose( (FILE*) out->sink.sinkData );
TidyDocFree( doc, out );
}
}
/************************
** Source
************************/
static void InitLastPos( StreamIn *in );
StreamIn* TY_(initStreamIn)( TidyDocImpl* doc, int encoding )
{
StreamIn *in = (StreamIn*) TidyDocAlloc( doc, sizeof(StreamIn) );
TidyClearMemory( in, sizeof(StreamIn) );
in->curline = 1;
in->curcol = 1;
in->encoding = encoding;
in->state = FSM_ASCII;
in->doc = doc;
in->bufsize = CHARBUF_SIZE;
in->allocator = doc->allocator;
in->charbuf = (tchar*)TidyDocAlloc(doc, sizeof(tchar) * in->bufsize);
InitLastPos( in );
return in;
}
void TY_(freeStreamIn)(StreamIn* in)
{
TidyFree(in->allocator, in->charbuf);
TidyFree(in->allocator, in);
}
StreamIn* TY_(FileInput)( TidyDocImpl* doc, FILE *fp, int encoding )
{
StreamIn *in = TY_(initStreamIn)( doc, encoding );
if ( TY_(initFileSource)( doc->allocator, &in->source, fp ) != 0 )
{
TY_(freeStreamIn)( in );
return NULL;
}
in->iotype = FileIO;
return in;
}
StreamIn* TY_(BufferInput)( TidyDocImpl* doc, TidyBuffer* buf, int encoding )
{
StreamIn *in = TY_(initStreamIn)( doc, encoding );
tidyInitInputBuffer( &in->source, buf );
in->iotype = BufferIO;
return in;
}
StreamIn* TY_(UserInput)( TidyDocImpl* doc, TidyInputSource* source, int encoding )
{
StreamIn *in = TY_(initStreamIn)( doc, encoding );
memcpy( &in->source, source, sizeof(TidyInputSource) );
in->iotype = UserIO;
return in;
}
int TY_(ReadBOMEncoding)(StreamIn *in)
{
uint c, c1;
uint bom;
c = ReadByte(in);
if (c == EndOfStream)
return -1;
c1 = ReadByte( in );
if (c1 == EndOfStream)
{
UngetByte(in, c);
return -1;
}
/* todo: dont warn about mismatch for auto input encoding */
/* todo: let the user override the encoding found here */
bom = (c << 8) + c1;
if ( bom == UNICODE_BOM_BE )
{
/* big-endian UTF-16 */
if ( in->encoding != UTF16 && in->encoding != UTF16BE )
TY_(ReportEncodingWarning)(in->doc, ENCODING_MISMATCH, UTF16BE);
return UTF16BE; /* return decoded BOM */
}
else if (bom == UNICODE_BOM_LE)
{
/* little-endian UTF-16 */
if (in->encoding != UTF16 && in->encoding != UTF16LE)
TY_(ReportEncodingWarning)(in->doc, ENCODING_MISMATCH, UTF16LE);
return UTF16LE; /* return decoded BOM */
}
else
{
uint c2 = ReadByte(in);
if (c2 == EndOfStream)
{
UngetByte(in, c1);
UngetByte(in, c);
return -1;
}
if (((c << 16) + (c1 << 8) + c2) == UNICODE_BOM_UTF8)
{
/* UTF-8 */
if (in->encoding != UTF8)
TY_(ReportEncodingWarning)(in->doc, ENCODING_MISMATCH, UTF8);
return UTF8;
}
else
UngetByte( in, c2 );
}
UngetByte(in, c1);
UngetByte(in, c);
return -1;
}
static void InitLastPos( StreamIn *in )
{
in->curlastpos = 0;
in->firstlastpos = 0;
}
static void PopLastPos( StreamIn *in )
{
in->curlastpos = (in->curlastpos+1)%LASTPOS_SIZE;
if ( in->curlastpos == in->firstlastpos )
in->firstlastpos = (in->firstlastpos+1)%LASTPOS_SIZE;
}
static void SaveLastPos( StreamIn *in )
{
PopLastPos( in );
in->lastcols[in->curlastpos] = in->curcol;
}
static void RestoreLastPos( StreamIn *in )
{
if ( in->firstlastpos == in->curlastpos )
in->curcol = 0;
else
{
in->curcol = in->lastcols[in->curlastpos];
if ( in->curlastpos == 0 )
in->curlastpos = LASTPOS_SIZE;
in->curlastpos--;
}
}
uint TY_(ReadChar)( StreamIn *in )
{
uint c = EndOfStream;
if ( in->pushed )
return PopChar( in );
SaveLastPos( in );
if ( in->tabs > 0 )
{
in->curcol++;
in->tabs--;
return ' ';
}
for (;;)
{
c = ReadCharFromStream(in);
if ( EndOfStream == c )
return EndOfStream;
if (c == '\n')
{
in->curcol = 1;
in->curline++;
break;
}
if (c == '\t')
{
Bool keeptabs = cfg( in->doc, TidyKeepTabs );
if (!keeptabs) {
uint tabsize = cfg(in->doc, TidyTabSize);
in->tabs = tabsize > 0 ?
tabsize - ((in->curcol - 1) % tabsize) - 1
: 0;
c = ' ';
}
in->curcol++;
break;
}
/* #427663 - map '\r' to '\n' - Andy Quick 11 Aug 00 */
if (c == '\r')
{
c = ReadCharFromStream(in);
if (c != '\n')
{
TY_(UngetChar)( c, in );
c = '\n';
}
else
{
}
in->curcol = 1;
in->curline++;
break;
}
#ifndef NO_NATIVE_ISO2022_SUPPORT
/* strip control characters, except for Esc */
if (c == '\033')
break;
#endif
/* Form Feed is allowed in HTML */
if ( c == '\015' && !cfgBool(in->doc, TidyXmlTags) )
break;
if ( c < 32 )
continue; /* discard control char */
/* watch out for chars that have already been decoded such as */
/* IS02022, UTF-8 etc, that don't require further decoding */
if (
in->encoding == RAW
#ifndef NO_NATIVE_ISO2022_SUPPORT
|| in->encoding == ISO2022
#endif
|| in->encoding == UTF8
|| in->encoding == SHIFTJIS /* #431953 - RJ */
|| in->encoding == BIG5 /* #431953 - RJ */
)
{
in->curcol++;
break;
}
/* handle surrogate pairs */
if ( in->encoding == UTF16LE ||
in->encoding == UTF16 ||
in->encoding == UTF16BE )
{
if ( !TY_(IsValidUTF16FromUCS4)(c) )
{
/* invalid UTF-16 value */
TY_(ReportEncodingError)(in->doc, INVALID_UTF16, c, yes);
c = 0;
}
else if ( TY_(IsLowSurrogate)(c) )
{
uint n = c;
uint m = ReadCharFromStream( in );
if ( m == EndOfStream )
return EndOfStream;
c = 0;
if ( TY_(IsHighSurrogate)(m) )
{
n = TY_(CombineSurrogatePair)( m, n );
if ( TY_(IsValidCombinedChar)(n) )
c = n;
}
/* not a valid pair */
if ( 0 == c )
TY_(ReportEncodingError)( in->doc, INVALID_UTF16, c, yes );
}
}
/* Do first: acts on range 128 - 255 */
switch ( in->encoding )
{
case MACROMAN:
c = TY_(DecodeMacRoman)( c );
break;
case IBM858:
c = DecodeIbm850( c );
break;
case LATIN0:
c = DecodeLatin0( c );
break;
}
/* produced e.g. as a side-effect of smart quotes in Word */
/* but can't happen if using MACROMAN encoding */
if ( 127 < c && c < 160 )
{
uint c1 = 0, replMode = DISCARDED_CHAR;
Bool isVendorChar = ( in->encoding == WIN1252 ||
in->encoding == MACROMAN );
Bool isMacChar = ( in->encoding == MACROMAN );
/* set error position just before offending character */
if (in->doc->lexer)
{
in->doc->lexer->lines = in->curline;
in->doc->lexer->columns = in->curcol;
}
if ( isMacChar )
c1 = TY_(DecodeMacRoman)( c );
else
c1 = TY_(DecodeWin1252)( c );
if ( c1 )
replMode = REPLACED_CHAR;
if ( c1 == 0 && isVendorChar )
TY_(ReportEncodingError)(in->doc, VENDOR_SPECIFIC_CHARS, c, replMode == DISCARDED_CHAR);
else if ( ! isVendorChar )
TY_(ReportEncodingError)(in->doc, INVALID_SGML_CHARS, c, replMode == DISCARDED_CHAR);
c = c1;
}
if ( c == 0 )
continue; /* illegal char is discarded */
in->curcol++;
break;
}
return c;
}
static uint PopChar( StreamIn *in )
{
uint c = EndOfStream;
if ( in->pushed )
{
assert( in->bufpos > 0 );
c = in->charbuf[ --in->bufpos ];
if ( in->bufpos == 0 )
in->pushed = no;
if ( c == '\n' )
{
in->curcol = 1;
in->curline++;
PopLastPos( in );
return c;
}
in->curcol++;
PopLastPos( in );
}
return c;
}
void TY_(UngetChar)( uint c, StreamIn *in )
{
if (c == EndOfStream)
{
/* fprintf(stderr, "Attempt to UngetChar EOF\n"); */
return;
}
in->pushed = yes;
if (in->bufpos + 1 >= in->bufsize)
in->charbuf = (tchar*)TidyRealloc(in->allocator, in->charbuf, sizeof(tchar) * ++(in->bufsize));
in->charbuf[(in->bufpos)++] = c;
if (c == '\n')
--(in->curline);
RestoreLastPos( in );
}
/************************
** Sink
************************/
static StreamOut* initStreamOut( TidyDocImpl* doc, int encoding, uint nl )
{
StreamOut* out = (StreamOut*) TidyDocAlloc( doc, sizeof(StreamOut) );
TidyClearMemory( out, sizeof(StreamOut) );
out->encoding = encoding;
out->state = FSM_ASCII;
out->nl = nl;
return out;
}
StreamOut* TY_(FileOutput)( TidyDocImpl *doc, FILE* fp, int encoding, uint nl )
{
StreamOut* out = initStreamOut( doc, encoding, nl );
TY_(initFileSink)( &out->sink, fp );
out->iotype = FileIO;
return out;
}
StreamOut* TY_(BufferOutput)( TidyDocImpl *doc, TidyBuffer* buf, int encoding, uint nl )
{
StreamOut* out = initStreamOut( doc, encoding, nl );
tidyInitOutputBuffer( &out->sink, buf );
out->iotype = BufferIO;
return out;
}
StreamOut* TY_(UserOutput)( TidyDocImpl *doc, TidyOutputSink* sink, int encoding, uint nl )
{
StreamOut* out = initStreamOut( doc, encoding, nl );
memcpy( &out->sink, sink, sizeof(TidyOutputSink) );
out->iotype = UserIO;
return out;
}
void TY_(WriteChar)( uint c, StreamOut* out )
{
/* Translate outgoing newlines */
if ( LF == c )
{
if ( out->nl == TidyCRLF )
TY_(WriteChar)( CR, out );
else if ( out->nl == TidyCR )
c = CR;
}
if (out->encoding == MACROMAN)
{
EncodeMacRoman( c, out );
}
else if (out->encoding == WIN1252)
{
EncodeWin1252( c, out );
}
else if (out->encoding == IBM858)
{
EncodeIbm858( c, out );
}
else if (out->encoding == LATIN0)
{
EncodeLatin0( c, out );
}
else if (out->encoding == UTF8)
{
int count = 0;
TY_(EncodeCharToUTF8Bytes)( c, NULL, &out->sink, &count );
if (count <= 0)
{
/* replacement char 0xFFFD encoded as UTF-8 */
PutByte(0xEF, out); PutByte(0xBF, out); PutByte(0xBF, out);
}
}
#ifndef NO_NATIVE_ISO2022_SUPPORT
else if (out->encoding == ISO2022)
{
if (c == 0x1b) /* ESC */
out->state = FSM_ESC;
else
{
switch (out->state)
{
case FSM_ESC:
if (c == '$')
out->state = FSM_ESCD;
else if (c == '(')
out->state = FSM_ESCP;
else
out->state = FSM_ASCII;
break;
case FSM_ESCD:
if (c == '(')
out->state = FSM_ESCDP;
else
out->state = FSM_NONASCII;
break;
case FSM_ESCDP:
out->state = FSM_NONASCII;
break;
case FSM_ESCP:
out->state = FSM_ASCII;
break;
case FSM_NONASCII:
c &= 0x7F;
break;
case FSM_ASCII:
break;
}
}
PutByte(c, out);
}
#endif /* NO_NATIVE_ISO2022_SUPPORT */
else if ( out->encoding == UTF16LE ||
out->encoding == UTF16BE ||
out->encoding == UTF16 )
{
int i, numChars = 1;
uint theChars[2];
if ( !TY_(IsValidUTF16FromUCS4)(c) )
{
/* invalid UTF-16 value */
numChars = 0;
}
else if ( TY_(IsCombinedChar)(c) )
{
/* output both, unless something goes wrong */
numChars = 2;
if ( !TY_(SplitSurrogatePair)(c, &theChars[0], &theChars[1]) )
{
numChars = 0;
}
}
else
{
/* just put the char out */
theChars[0] = c;
}
for (i = 0; i < numChars; i++)
{
c = theChars[i];
if (out->encoding == UTF16LE)
{
uint ch = c & 0xFF; PutByte(ch, out);
ch = (c >> 8) & 0xFF; PutByte(ch, out);
}
else if (out->encoding == UTF16BE || out->encoding == UTF16)
{
uint ch = (c >> 8) & 0xFF; PutByte(ch, out);
ch = c & 0xFF; PutByte(ch, out);
}
}
}
else if (out->encoding == BIG5 || out->encoding == SHIFTJIS)
{
if (c < 128)
PutByte(c, out);
else
{
uint ch = (c >> 8) & 0xFF; PutByte(ch, out);
ch = c & 0xFF; PutByte(ch, out);
}
}
else
PutByte( c, out );
}
/****************************
** Miscellaneous / Helpers
****************************/
/* Mapping for Windows Western character set CP 1252
** (chars 128-159/U+0080-U+009F) to Unicode.
*/
static const uint Win2Unicode[32] =
{
0x20AC, 0x0000, 0x201A, 0x0192, 0x201E, 0x2026, 0x2020, 0x2021,
0x02C6, 0x2030, 0x0160, 0x2039, 0x0152, 0x0000, 0x017D, 0x0000,
0x0000, 0x2018, 0x2019, 0x201C, 0x201D, 0x2022, 0x2013, 0x2014,
0x02DC, 0x2122, 0x0161, 0x203A, 0x0153, 0x0000, 0x017E, 0x0178
};
/* Function for conversion from Windows-1252 to Unicode */
uint TY_(DecodeWin1252)(uint c)
{
if (127 < c && c < 160)
c = Win2Unicode[c - 128];
return c;
}
static void EncodeWin1252( uint c, StreamOut* out )
{
if (c < 128 || (c > 159 && c < 256))
PutByte(c, out);
else
{
int i;
for (i = 128; i < 160; i++)
if (Win2Unicode[i - 128] == c)
{
PutByte(i, out);
break;
}
}
}
/*
John Love-Jensen contributed this table for mapping MacRoman
character set to Unicode
*/
/* modified to only need chars 128-255/U+0080-U+00FF - Terry Teague 19 Aug 01 */
static const uint Mac2Unicode[128] =
{
/* x7F = DEL */
0x00C4, 0x00C5, 0x00C7, 0x00C9, 0x00D1, 0x00D6, 0x00DC, 0x00E1,
0x00E0, 0x00E2, 0x00E4, 0x00E3, 0x00E5, 0x00E7, 0x00E9, 0x00E8,
0x00EA, 0x00EB, 0x00ED, 0x00EC, 0x00EE, 0x00EF, 0x00F1, 0x00F3,
0x00F2, 0x00F4, 0x00F6, 0x00F5, 0x00FA, 0x00F9, 0x00FB, 0x00FC,
0x2020, 0x00B0, 0x00A2, 0x00A3, 0x00A7, 0x2022, 0x00B6, 0x00DF,
0x00AE, 0x00A9, 0x2122, 0x00B4, 0x00A8, 0x2260, 0x00C6, 0x00D8,
0x221E, 0x00B1, 0x2264, 0x2265, 0x00A5, 0x00B5, 0x2202, 0x2211,
/* =BD U+2126 OHM SIGN */
0x220F, 0x03C0, 0x222B, 0x00AA, 0x00BA, 0x03A9, 0x00E6, 0x00F8,
0x00BF, 0x00A1, 0x00AC, 0x221A, 0x0192, 0x2248, 0x2206, 0x00AB,
0x00BB, 0x2026, 0x00A0, 0x00C0, 0x00C3, 0x00D5, 0x0152, 0x0153,
0x2013, 0x2014, 0x201C, 0x201D, 0x2018, 0x2019, 0x00F7, 0x25CA,
/* =DB U+00A4 CURRENCY SIGN */
0x00FF, 0x0178, 0x2044, 0x20AC, 0x2039, 0x203A, 0xFB01, 0xFB02,
0x2021, 0x00B7, 0x201A, 0x201E, 0x2030, 0x00C2, 0x00CA, 0x00C1,
0x00CB, 0x00C8, 0x00CD, 0x00CE, 0x00CF, 0x00CC, 0x00D3, 0x00D4,
/* xF0 = Apple Logo */
/* =F0 U+2665 BLACK HEART SUIT */
0xF8FF, 0x00D2, 0x00DA, 0x00DB, 0x00D9, 0x0131, 0x02C6, 0x02DC,
0x00AF, 0x02D8, 0x02D9, 0x02DA, 0x00B8, 0x02DD, 0x02DB, 0x02C7
};
/* Function to convert from MacRoman to Unicode */
uint TY_(DecodeMacRoman)(uint c)
{
if (127 < c && c < 256) /* Is. #891 */
c = Mac2Unicode[c - 128];
return c;
}
static void EncodeMacRoman( uint c, StreamOut* out )
{
if (c < 128)
PutByte(c, out);
else
{
/* For mac users, map Unicode back to MacRoman. */
int i;
for (i = 128; i < 256; i++)
{
if (Mac2Unicode[i - 128] == c)
{
PutByte(i, out);
break;
}
}
}
}
/* Mapping for OS/2 Western character set CP 850
** (chars 128-255) to Unicode.
*/
static const uint IBM2Unicode[128] =
{
0x00C7, 0x00FC, 0x00E9, 0x00E2, 0x00E4, 0x00E0, 0x00E5, 0x00E7,
0x00EA, 0x00EB, 0x00E8, 0x00EF, 0x00EE, 0x00EC, 0x00C4, 0x00C5,
0x00C9, 0x00E6, 0x00C6, 0x00F4, 0x00F6, 0x00F2, 0x00FB, 0x00F9,
0x00FF, 0x00D6, 0x00DC, 0x00F8, 0x00A3, 0x00D8, 0x00D7, 0x0192,
0x00E1, 0x00ED, 0x00F3, 0x00FA, 0x00F1, 0x00D1, 0x00AA, 0x00BA,
0x00BF, 0x00AE, 0x00AC, 0x00BD, 0x00BC, 0x00A1, 0x00AB, 0x00BB,
0x2591, 0x2592, 0x2593, 0x2502, 0x2524, 0x00C1, 0x00C2, 0x00C0,
0x00A9, 0x2563, 0x2551, 0x2557, 0x255D, 0x00A2, 0x00A5, 0x2510,
0x2514, 0x2534, 0x252C, 0x251C, 0x2500, 0x253C, 0x00E3, 0x00C3,
0x255A, 0x2554, 0x2569, 0x2566, 0x2560, 0x2550, 0x256c, 0x00a4,
0x00f0, 0x00d0, 0x00ca, 0x00cb, 0x00c8, 0x20AC, 0x00cd, 0x00ce,
0x00cf, 0x2518, 0x250c, 0x2588, 0x2584, 0x00a6, 0x00cc, 0x2580,
0x00d3, 0x00df, 0x00d4, 0x00d2, 0x00f5, 0x00d5, 0x00b5, 0x00fe,
0x00de, 0x00da, 0x00db, 0x00d9, 0x00fd, 0x00dd, 0x00af, 0x00b4,
0x00ad, 0x00b1, 0x2017, 0x00be, 0x00b6, 0x00a7, 0x00f7, 0x00b8,
0x00b0, 0x00a8, 0x00b7, 0x00b9, 0x00b3, 0x00b2, 0x25a0, 0x00a0
};
/* Function for conversion from OS/2-850 to Unicode */
static uint DecodeIbm850(uint c)
{
if (127 < c && c < 256)
c = IBM2Unicode[c - 128];
return c;
}
/* For OS/2,Java users, map Unicode back to IBM858 (IBM850+Euro). */
static void EncodeIbm858( uint c, StreamOut* out )
{
if (c < 128)
PutByte(c, out);
else
{
int i;
for (i = 128; i < 256; i++)
{
if (IBM2Unicode[i - 128] == c)
{
PutByte(i, out);
break;
}
}
}
}
/* Convert from Latin0 (aka Latin9, ISO-8859-15) to Unicode */
static uint DecodeLatin0(uint c)
{
if (163 < c && c < 191)
{
switch (c)
{
case 0xA4: c = 0x20AC; break;
case 0xA6: c = 0x0160; break;
case 0xA8: c = 0x0161; break;
case 0xB4: c = 0x017D; break;
case 0xB8: c = 0x017E; break;
case 0xBC: c = 0x0152; break;
case 0xBD: c = 0x0153; break;
case 0xBE: c = 0x0178; break;
}
}
return c;
}
/* Map Unicode back to ISO-8859-15. */
static void EncodeLatin0( uint c, StreamOut* out )
{
switch (c)
{
case 0x20AC: c = 0xA4; break;
case 0x0160: c = 0xA6; break;
case 0x0161: c = 0xA8; break;
case 0x017D: c = 0xB4; break;
case 0x017E: c = 0xB8; break;
case 0x0152: c = 0xBC; break;
case 0x0153: c = 0xBD; break;
case 0x0178: c = 0xBE; break;
}
PutByte(c, out);
}
/* Facilitates user defined source by providing
** an entry point to marshal pointers-to-functions.
** Needed by .NET and possibly other language bindings.
*/
Bool TIDY_CALL tidyInitSource( TidyInputSource* source,
void* srcData,
TidyGetByteFunc gbFunc,
TidyUngetByteFunc ugbFunc,
TidyEOFFunc endFunc )
{
Bool status = ( source && srcData && gbFunc && ugbFunc && endFunc );
if ( status )
{
source->sourceData = srcData;
source->getByte = gbFunc;
source->ungetByte = ugbFunc;
source->eof = endFunc;
}
return status;
}
Bool TIDY_CALL tidyInitSink( TidyOutputSink* sink,
void* snkData,
TidyPutByteFunc pbFunc )
{
Bool status = ( sink && snkData && pbFunc );
if ( status )
{
sink->sinkData = snkData;
sink->putByte = pbFunc;
}
return status;
}
/* GetByte must return a byte value in a signed
** integer so that a negative value can signal EOF
** without interfering w/ 0-255 legitimate byte values.
*/
uint TIDY_CALL tidyGetByte( TidyInputSource* source )
{
int bv = source->getByte( source->sourceData );
return (uint) bv;
}
Bool TIDY_CALL tidyIsEOF( TidyInputSource* source )
{
return source->eof( source->sourceData );
}
void TIDY_CALL tidyUngetByte( TidyInputSource* source, uint ch )
{
source->ungetByte( source->sourceData, (byte) ch );
}
void TIDY_CALL tidyPutByte( TidyOutputSink* sink, uint ch )
{
sink->putByte( sink->sinkData, (byte) ch );
}
static uint ReadByte( StreamIn* in )
{
return tidyGetByte( &in->source );
}
Bool TY_(IsEOF)( StreamIn* in )
{
return tidyIsEOF( &in->source );
}
static void UngetByte( StreamIn* in, uint byteValue )
{
tidyUngetByte( &in->source, byteValue );
}
static void PutByte( uint byteValue, StreamOut* out )
{
tidyPutByte( &out->sink, byteValue );
}
/* read char from stream */
static uint ReadCharFromStream( StreamIn* in )
{
uint c, n;
if ( TY_(IsEOF)(in) )
return EndOfStream;
c = ReadByte( in );
if (c == EndOfStream)
return c;
#ifndef NO_NATIVE_ISO2022_SUPPORT
/*
A document in ISO-2022 based encoding uses some ESC sequences
called "designator" to switch character sets. The designators
defined and used in ISO-2022-JP are:
"ESC" + "(" + ? for ISO646 variants
"ESC" + "$" + ? and
"ESC" + "$" + "(" + ? for multibyte character sets
Where ? stands for a single character used to indicate the
character set for multibyte characters.
Tidy handles this by preserving the escape sequence and
setting the top bit of each byte for non-ascii chars. This
bit is then cleared on output. The input stream keeps track
of the state to determine when to set/clear the bit.
*/
if (in->encoding == ISO2022)
{
if (c == 0x1b) /* ESC */
{
in->state = FSM_ESC;
return c;
}
switch (in->state)
{
case FSM_ESC:
if (c == '$')
in->state = FSM_ESCD;
else if (c == '(')
in->state = FSM_ESCP;
else
in->state = FSM_ASCII;
break;
case FSM_ESCD:
if (c == '(')
in->state = FSM_ESCDP;
else
in->state = FSM_NONASCII;
break;
case FSM_ESCDP:
in->state = FSM_NONASCII;
break;
case FSM_ESCP:
in->state = FSM_ASCII;
break;
case FSM_NONASCII:
c |= 0x80;
break;
case FSM_ASCII:
break;
}
return c;
}
#endif /* NO_NATIVE_ISO2022_SUPPORT */
if ( in->encoding == UTF16LE )
{
uint c1 = ReadByte( in );
if ( EndOfStream == c1 )
return EndOfStream;
n = (c1 << 8) + c;
return n;
}
if ((in->encoding == UTF16) || (in->encoding == UTF16BE)) /* UTF-16 is big-endian by default */
{
uint c1 = ReadByte( in );
if ( EndOfStream == c1 )
return EndOfStream;
n = (c << 8) + c1;
return n;
}
if ( in->encoding == UTF8 )
{
/* deal with UTF-8 encoded char */
int err, count = 0;
/* first byte "c" is passed in separately */
err = TY_(DecodeUTF8BytesToChar)( &n, c, NULL, &in->source, &count );
if (!err && (n == (uint)EndOfStream) && (count == 1)) /* EOF */
return EndOfStream;
else if (err)
{
/* set error position just before offending character */
in->doc->lexer->lines = in->curline;
in->doc->lexer->columns = in->curcol;
TY_(ReportEncodingError)(in->doc, INVALID_UTF8, n, no);
n = 0xFFFD; /* replacement char */
}
return n;
}
/*
This section is suitable for any "multibyte" variable-width
character encoding in which a one-byte code is less than
128, and the first byte of a two-byte code is greater or
equal to 128. Note that Big5 and ShiftJIS fit into this
kind, even though their second byte may be less than 128
*/
if ((in->encoding == BIG5) || (in->encoding == SHIFTJIS))
{
if (c < 128)
return c;
else if ((in->encoding == SHIFTJIS) && (c >= 0xa1 && c <= 0xdf)) /* 461643 - fix suggested by Rick Cameron 14 Sep 01 */
{
/*
Rick Cameron pointed out that for Shift_JIS, the values from
0xa1 through 0xdf represent singe-byte characters
(U+FF61 to U+FF9F - half-shift Katakana)
*/
return c;
}
else
{
uint c1 = ReadByte( in );
if ( EndOfStream == c1 )
return EndOfStream;
n = (c << 8) + c1;
return n;
}
}
else
n = c;
return n;
}
/* Output a Byte Order Mark if required */
void TY_(outBOM)( StreamOut *out )
{
if ( out->encoding == UTF8
|| out->encoding == UTF16LE
|| out->encoding == UTF16BE
|| out->encoding == UTF16
)
{
/* this will take care of encoding the BOM correctly */
TY_(WriteChar)( UNICODE_BOM, out );
}
}
/* this is in intermediate fix for various problems in the */
/* long term code and data in charsets.c should be used */
static struct _enc2iana
{
uint id;
ctmbstr name;
ctmbstr tidyOptName;
} const enc2iana[] =
{
{ ASCII, "us-ascii", "ascii" },
{ LATIN0, "iso-8859-15", "latin0" },
{ LATIN1, "iso-8859-1", "latin1" },
{ UTF8, "utf-8", "utf8" },
{ MACROMAN, "macintosh", "mac" },
{ WIN1252, "windows-1252", "win1252" },
{ IBM858, "ibm00858", "ibm858" },
{ UTF16LE, "utf-16", "utf16le" },
{ UTF16BE, "utf-16", "utf16be" },
{ UTF16, "utf-16", "utf16" },
{ BIG5, "big5", "big5" },
{ SHIFTJIS, "shift_jis", "shiftjis"},
#ifndef NO_NATIVE_ISO2022_SUPPORT
{ ISO2022, NULL, "iso2022" },
#endif
{ RAW, NULL, "raw" }
};
ctmbstr TY_(GetEncodingNameFromTidyId)(uint id)
{
uint i;
for (i = 0; enc2iana[i].name; ++i)
if (enc2iana[i].id == id)
return enc2iana[i].name;
return NULL;
}
ctmbstr TY_(GetEncodingOptNameFromTidyId)(uint id)
{
uint i;
for (i = 0; i < sizeof(enc2iana)/sizeof(enc2iana[0]); ++i)
if (enc2iana[i].id == id)
return enc2iana[i].tidyOptName;
return NULL;
}
int TY_(GetCharEncodingFromOptName)( ctmbstr charenc )
{
uint i;
for (i = 0; i < sizeof(enc2iana)/sizeof(enc2iana[0]); ++i)
if (TY_(tmbstrcasecmp)(charenc, enc2iana[i].tidyOptName) == 0 )
return enc2iana[i].id;
return -1;
}
/*
* local variables:
* mode: c
* indent-tabs-mode: nil
* c-basic-offset: 4
* eval: (c-set-offset 'substatement-open 0)
* end:
*/
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