Annotation of parser3/src/main/pa_charset.C, revision 1.81
1.1 paf 1: /** @file
2: Parser: Charset connection implementation.
3:
1.68 misha 4: Copyright(c) 2001-2009 ArtLebedev Group (http://www.artlebedev.com)
1.4 paf 5: Author: Alexander Petrosyan<paf@design.ru>(http://paf.design.ru)
1.27 paf 6: */
1.1 paf 7:
1.81 ! misha 8: static const char * const IDENT_CHARSET_C="$Date: 2009-10-03 02:18:11 $";
1.1 paf 9:
10: #include "pa_charset.h"
1.35 paf 11: #include "pa_charsets.h"
1.1 paf 12:
13: #ifdef XML
1.8 paf 14: #include "libxml/encoding.h"
1.1 paf 15: #endif
16:
1.46 paf 17: //#define PA_PATCHED_LIBXML_BACKWARD
1.67 misha 18:
19: // reduce memory usage by pre-calculation utf-8 string length
1.60 misha 20: #define PRECALCULATE_DEST_LENGTH
1.46 paf 21:
1.38 paf 22: // globals
23:
24: Charset::UTF8CaseTable::Rec UTF8CaseToUpperRecords[]={
25: #include "utf8-to-upper.inc"
26: };
27: Charset::UTF8CaseTable UTF8CaseToUpper={
28: sizeof(UTF8CaseToUpperRecords)/sizeof(Charset::UTF8CaseTable::Rec),
29: UTF8CaseToUpperRecords};
30:
31: Charset::UTF8CaseTable::Rec UTF8CaseToLowerRecords[]={
32: #include "utf8-to-lower.inc"
33: };
34: Charset::UTF8CaseTable UTF8CaseToLower={
35: sizeof(UTF8CaseToLowerRecords)/sizeof(Charset::UTF8CaseTable::Rec),
36: UTF8CaseToLowerRecords};
37:
1.1 paf 38: // helpers
39:
40: inline void prepare_case_tables(unsigned char *tables) {
41: unsigned char *lcc_table=tables+lcc_offset;
42: unsigned char *fcc_table=tables+fcc_offset;
43: for(int i=0; i<0x100; i++)
1.53 paf 44: lcc_table[i]=fcc_table[i]=(unsigned char)i;
1.1 paf 45: }
46: inline void cstr2ctypes(unsigned char *tables, const unsigned char *cstr,
47: unsigned char bit) {
48: unsigned char *ctypes_table=tables+ctypes_offset;
49: ctypes_table[0]=bit;
50: for(; *cstr; cstr++) {
51: unsigned char c=*cstr;
52: ctypes_table[c]|=bit;
53: }
54: }
1.35 paf 55: inline unsigned int to_wchar_code(const char* cstr) {
1.1 paf 56: if(!cstr || !*cstr)
57: return 0;
58: if(cstr[1]==0)
1.4 paf 59: return(unsigned int)(unsigned char)cstr[0];
1.1 paf 60:
61: char *error_pos;
1.4 paf 62: return(unsigned int)strtol(cstr, &error_pos, 0);
1.1 paf 63: }
1.35 paf 64: inline bool to_bool(const char* cstr) {
1.1 paf 65: return cstr && *cstr!=0;
66: }
67: static void element2ctypes(unsigned char c, bool belongs,
68: unsigned char *tables, unsigned char bit, int group_offset=-1) {
69: if(!belongs)
70: return;
71:
72: unsigned char *ctypes_table=tables+ctypes_offset;
73:
74: ctypes_table[c]|=bit;
75: if(group_offset>=0)
1.4 paf 76: tables[cbits_offset+group_offset+c/8] |= 1<<(c%8);
1.1 paf 77: }
78: static void element2case(unsigned char from, unsigned char to,
79: unsigned char *tables) {
80: if(!to)
81: return;
82:
83: unsigned char *lcc_table=tables+lcc_offset;
84: unsigned char *fcc_table=tables+fcc_offset;
85: lcc_table[from]=to;
86: fcc_table[from]=to; fcc_table[to]=from;
87: }
88:
89: // methods
90:
1.37 paf 91: Charset::Charset(Request_charsets* charsets, const String::Body ANAME, const String* afile_spec):
1.35 paf 92: FNAME(ANAME),
93: FNAME_CSTR(ANAME.cstrm()) {
1.7 paf 94:
1.35 paf 95: if(afile_spec) {
1.1 paf 96: fisUTF8=false;
1.35 paf 97: load_definition(*charsets, *afile_spec);
1.1 paf 98: #ifdef XML
1.35 paf 99: addEncoding(FNAME_CSTR);
1.1 paf 100: #endif
101: } else {
102: fisUTF8=true;
1.4 paf 103: // grab default onces [for UTF-8 so to be able to make a-z =>A-Z
1.65 misha 104: memcpy(pcre_tables, _pcre_default_tables, sizeof(pcre_tables));
1.1 paf 105: }
106:
107: #ifdef XML
1.35 paf 108: initTranscoder(FNAME, FNAME_CSTR);
1.1 paf 109: #endif
110: }
111:
1.35 paf 112: void Charset::load_definition(Request_charsets& charsets, const String& afile_spec) {
1.1 paf 113: // pcre_tables
114: // lowcase, flipcase, bits digit+word+whitespace, masks
115:
116: // must not move this inside of prepare_case_tables
117: // don't know the size there
118: memset(pcre_tables, 0, sizeof(pcre_tables));
119: prepare_case_tables(pcre_tables);
1.4 paf 120: cstr2ctypes(pcre_tables,(const unsigned char *)"*+?{^.$|()[", ctype_meta);
1.1 paf 121:
122: // charset
1.35 paf 123: memset(&tables, 0, sizeof(tables));
1.1 paf 124:
125: // loading text
1.35 paf 126: char *data=file_read_text(charsets, afile_spec);
1.1 paf 127:
128: // ignore header
129: getrow(&data);
130:
131: // parse cells
132: char *row;
1.42 paf 133: while((row=getrow(&data))) {
1.1 paf 134: // remove empty&comment lines
135: if(!*row || *row=='#')
136: continue;
137:
138: // char white-space digit hex-digit letter word lowercase unicode1 unicode2
1.53 paf 139: unsigned char c=0;
1.1 paf 140: char *cell;
1.42 paf 141: for(int column=0; (cell=lsplit(&row, '\t')); column++) {
1.1 paf 142: switch(column) {
1.53 paf 143: case 0: c=(unsigned char)to_wchar_code(cell); break;
1.1 paf 144: // pcre_tables
145: case 1: element2ctypes(c, to_bool(cell), pcre_tables, ctype_space, cbit_space); break;
146: case 2: element2ctypes(c, to_bool(cell), pcre_tables, ctype_digit, cbit_digit); break;
147: case 3: element2ctypes(c, to_bool(cell), pcre_tables, ctype_xdigit); break;
148: case 4: element2ctypes(c, to_bool(cell), pcre_tables, ctype_letter); break;
149: case 5: element2ctypes(c, to_bool(cell), pcre_tables, ctype_word, cbit_word); break;
1.53 paf 150: case 6: element2case(c, (unsigned char)to_wchar_code(cell), pcre_tables); break;
1.1 paf 151: case 7:
152: case 8:
153: // charset
1.10 paf 154: if(tables.toTableSize>MAX_CHARSET_UNI_CODES)
1.56 misha 155: throw Exception(PARSER_RUNTIME,
1.35 paf 156: &afile_spec,
1.1 paf 157: "charset must contain not more then %d unicode values", MAX_CHARSET_UNI_CODES);
158:
159: XMLCh unicode=(XMLCh)to_wchar_code(cell);
160: if(!unicode && column==7/*unicode1 column*/)
161: unicode=(XMLCh)c;
162: if(unicode) {
1.10 paf 163: if(!tables.fromTable[c])
164: tables.fromTable[c]=unicode;
165: tables.toTable[tables.toTableSize].intCh=unicode;
166: tables.toTable[tables.toTableSize].extCh=(XMLByte)c;
167: tables.toTableSize++;
1.1 paf 168: }
169: break;
170: }
171: }
172: };
173:
174: // sort by the Unicode code point
175: sort_ToTable();
176: }
177:
178: static int sort_cmp_Trans_rec_intCh(const void *a, const void *b) {
179: return
1.38 paf 180: static_cast<const Charset::Tables::Rec *>(a)->intCh-
181: static_cast<const Charset::Tables::Rec *>(b)->intCh;
1.1 paf 182: }
183:
184: void Charset::sort_ToTable() {
1.10 paf 185: _qsort(tables.toTable, tables.toTableSize, sizeof(*tables.toTable),
1.1 paf 186: sort_cmp_Trans_rec_intCh);
187: //FILE *f=fopen("c:\\temp\\a", "wb");
1.10 paf 188: //fwrite(tables.toTable, tables.toTableSize, sizeof(*tables.toTable), f);
1.1 paf 189: //fclose(f);
190: }
191:
1.60 misha 192: // @todo: precache for spedup searching
1.10 paf 193: static XMLByte xlatOneTo(const XMLCh toXlat,
1.35 paf 194: const Charset::Tables& tables,
195: XMLByte not_found) {
1.80 misha 196: int lo = 0;
197: int hi = tables.toTableSize - 1;
1.39 paf 198: while(lo<=hi) {
1.35 paf 199: // Calc the mid point of the low and high offset.
1.39 paf 200: const unsigned int i = (lo + hi) / 2;
201:
202: XMLCh cur=tables.toTable[i].intCh;
203: if(toXlat==cur)
204: return tables.toTable[i].extCh;
205: if(toXlat>cur)
206: lo = i+1;
1.1 paf 207: else
1.39 paf 208: hi = i-1;
209: }
1.35 paf 210:
211: return not_found;
1.1 paf 212: }
213:
1.35 paf 214: String::C Charset::transcode(const String::C src,
215: const Charset& source_charset,
216: const Charset& dest_charset) {
217: if(!src.length)
218: return String::C("", 0);
1.4 paf 219:
1.1 paf 220: switch((source_charset.isUTF8()?0x10:0x00)|(dest_charset.isUTF8()?0x01:0x00)) {
221: default: // 0x00
1.35 paf 222: return source_charset.transcodeToCharset(src, dest_charset);
1.1 paf 223: case 0x01:
1.35 paf 224: return source_charset.transcodeToUTF8(src);
1.1 paf 225: case 0x10:
1.35 paf 226: return dest_charset.transcodeFromUTF8(src);
1.1 paf 227: case 0x11:
1.35 paf 228: return src;
1.1 paf 229: }
230: }
231:
232: // ---------------------------------------------------------------------------
233: // Local static data
234: //
235: // gUTFBytes
236: // A list of counts of trailing bytes for each initial byte in the input.
237: //
238: // gUTFOffsets
239: // A list of values to offset each result char type, according to how
240: // many source bytes when into making it.
241: //
242: // gFirstByteMark
243: // A list of values to mask onto the first byte of an encoded sequence,
244: // indexed by the number of bytes used to create the sequence.
245: // ---------------------------------------------------------------------------
246: static const XMLByte gUTFBytes[0x100] = {
247: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
248: , 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
249: , 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
250: , 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
251: , 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
252: , 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
253: , 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
254: , 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
255: , 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
256: , 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
257: , 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
258: , 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
259: , 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1
260: , 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1
261: , 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2
262: , 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5
263: };
264:
265: static const uint gUTFOffsets[6] = {
1.80 misha 266: 0, 0x3080, 0xE2080, 0x3C82080, 0xFA082080, 0x82082080
1.1 paf 267: };
268:
269: static const XMLByte gFirstByteMark[7] = {
1.80 misha 270: 0x00, 0x00, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC
1.1 paf 271: };
272:
1.71 misha 273: static int transcodeToUTF8(const XMLByte* srcData, int& srcLen,
274: XMLByte *toFill, int& toFillLen,
275: const Charset::Tables& tables) {
1.11 paf 276: const XMLByte* srcPtr=srcData;
277: const XMLByte* srcEnd=srcData+srcLen;
278: XMLByte* outPtr=toFill;
279: XMLByte* outEnd=toFill+toFillLen;
1.1 paf 280:
1.35 paf 281: while(srcPtr<srcEnd) {
282: uint curVal = tables.fromTable[*srcPtr];
1.1 paf 283: if(!curVal) {
1.35 paf 284: // use the replacement character
285: *outPtr++= '?';
286: srcPtr++;
287: continue;
288: }
1.1 paf 289:
1.35 paf 290: // Figure out how many bytes we need
291: unsigned int encodedBytes;
292: if(curVal<0x80)
293: encodedBytes = 1;
294: else if(curVal<0x800)
295: encodedBytes = 2;
296: else if(curVal<0x10000)
297: encodedBytes = 3;
298: else if(curVal<0x200000)
299: encodedBytes = 4;
300: else if(curVal<0x4000000)
301: encodedBytes = 5;
302: else if(curVal<= 0x7FFFFFFF)
303: encodedBytes = 6;
304: else {
305: // use the replacement character
306: *outPtr++= '?';
307: srcPtr++;
308: continue;
309: }
1.11 paf 310:
1.35 paf 311: // If we cannot fully get this char into the output buffer
312: if (outPtr + encodedBytes > outEnd)
313: break;
314:
315: // We can do it, so update the source index
316: srcPtr++;
317:
318: // And spit out the bytes. We spit them out in reverse order
319: // here, so bump up the output pointer and work down as we go.
320: outPtr+= encodedBytes;
321: switch(encodedBytes) {
1.60 misha 322: case 6: *--outPtr = XMLByte((curVal | 0x80UL) & 0xBFUL);
323: curVal>>= 6;
324: case 5: *--outPtr = XMLByte((curVal | 0x80UL) & 0xBFUL);
325: curVal>>= 6;
326: case 4: *--outPtr = XMLByte((curVal | 0x80UL) & 0xBFUL);
327: curVal>>= 6;
328: case 3: *--outPtr = XMLByte((curVal | 0x80UL) & 0xBFUL);
329: curVal>>= 6;
330: case 2: *--outPtr = XMLByte((curVal | 0x80UL) & 0xBFUL);
331: curVal>>= 6;
332: case 1: *--outPtr = XMLByte(curVal | gFirstByteMark[encodedBytes]);
1.35 paf 333: }
334:
335: // Add the encoded bytes back in again to indicate we've eaten them
336: outPtr+= encodedBytes;
337: }
338:
339: // Update the bytes eaten
340: srcLen = srcPtr - srcData;
341:
342: // Return the characters read
343: toFillLen = outPtr - toFill;
344:
1.29 paf 345: //return srcPtr==srcEnd?(int)toFillLen:-1;
346: /*
347: xmlCharEncodingInputFunc
348: Returns :
349: the number of byte written, or -1 by lack of space, or -2 if the transcoding failed. The value of inlen after return is the
350: number of octets consumed as the return value is positive, else unpredictiable. The value of outlen after return is the number
351: of ocetes consumed.
352: */
353: return 0;
1.1 paf 354: }
1.26 paf 355: /// @todo digital entites only when xml/html output [at output in html/xml mode, in html part of a letter]
1.71 misha 356: static int transcodeFromUTF8(const XMLByte* srcData, int& srcLen,
357: XMLByte* toFill, int& toFillLen,
358: const Charset::Tables& tables) {
1.11 paf 359: const XMLByte* srcPtr=srcData;
360: const XMLByte* srcEnd=srcData+srcLen;
361: XMLByte* outPtr=toFill;
362: XMLByte* outEnd=toFill+toFillLen;
1.1 paf 363:
1.35 paf 364: // We now loop until we either run out of input data, or room to store
365: while ((srcPtr < srcEnd) && (outPtr < outEnd)) {
366: // Get the next leading byte out
367: const XMLByte firstByte =* srcPtr;
368:
369: // Special-case ASCII, which is a leading byte value of<= 127
1.60 misha 370: if(firstByte<=127) {
1.35 paf 371: *outPtr++= firstByte;
372: srcPtr++;
373: continue;
374: }
375:
376: // See how many trailing src bytes this sequence is going to require
377: const unsigned int trailingBytes = gUTFBytes[firstByte];
378:
379: // If there are not enough source bytes to do this one, then we
380: // are done. Note that we done>= here because we are implicitly
381: // counting the 1 byte we get no matter what.
382: if(srcPtr+trailingBytes>= srcEnd)
383: break;
384:
385: // Looks ok, so lets build up the value
386: uint tmpVal=0;
387: switch(trailingBytes) {
388: case 5: tmpVal+=*srcPtr++; tmpVal<<=6;
389: case 4: tmpVal+=*srcPtr++; tmpVal<<=6;
390: case 3: tmpVal+=*srcPtr++; tmpVal<<=6;
391: case 2: tmpVal+=*srcPtr++; tmpVal<<=6;
392: case 1: tmpVal+=*srcPtr++; tmpVal<<=6;
393: case 0: tmpVal+=*srcPtr++;
394: break;
395:
396: default:
397: throw Exception(0,
398: 0,
1.49 paf 399: "transcodeFromUTF8 error: wrong trailingBytes value(%d)", trailingBytes); // never
1.35 paf 400: }
401: tmpVal-=gUTFOffsets[trailingBytes];
402:
403: // If it will fit into a single char, then put it in. Otherwise
404: // fail [*encode it as a surrogate pair. If its not valid, use the
405: // replacement char.*]
406: if(!(tmpVal & 0xFFFF0000)) {
1.25 paf 407: if(XMLByte xlat=xlatOneTo(tmpVal, tables, 0))
408: *outPtr++=xlat;
1.49 paf 409: else {
1.50 paf 410: outPtr+=sprintf((char *)outPtr, "&#%u;", tmpVal); // &#decimal;
1.49 paf 411: }
412: } else {
413: const XMLByte* recoverPtr=srcPtr-trailingBytes-1;
414: for(uint i=0; i<=trailingBytes; i++)
415: outPtr+=sprintf((char*)outPtr, "%%%02X", *recoverPtr++);
416: }
1.1 paf 417: }
1.35 paf 418:
419: // Update the bytes eaten
420: srcLen = srcPtr - srcData;
421:
422: // Return the characters read
423: toFillLen = outPtr - toFill;
1.11 paf 424:
1.29 paf 425: //return srcPtr==srcEnd?(int)toFillLen:-1;
426: /*
427: xmlCharEncodingOutputFunc
428: Returns :
429: the number of byte written, or -1 by lack of space, or -2 if the transcoding failed. The value of inlen after return is the
430: number of octets consumed as the return value is positive, else unpredictiable. The value of outlen after return is the number
431: of ocetes consumed.
432: */
433: return 0;
1.10 paf 434: }
435:
1.70 misha 436: static bool isEscaped(XMLByte c){
1.60 misha 437: return
1.66 misha 438: !(
439: (c<=127)
440: && (
441: ((c>='0') && (c<='9'))
442: || ((c>='A') && (c<='Z'))
443: || ((c>='a') && (c<='z'))
444: || strchr("*@-_+./", c)!=0
445: )
446: );
1.60 misha 447: }
448:
1.70 misha 449: // read one UTF8 char and return length of this char (in bytes)
450: static unsigned int readUTF8Char(const XMLByte*& srcPtr, const XMLByte* srcEnd, XMLByte& firstByte, XMLCh& UTF8Char){
1.60 misha 451: if(!srcPtr || !*srcPtr || srcPtr>=srcEnd)
452: return 0;
453:
454: firstByte=*srcPtr;
455:
456: if(firstByte<=127){
457: UTF8Char=firstByte;
458: srcPtr++;
459: return 1;
460: }
461:
462: unsigned int trailingBytes=gUTFBytes[firstByte];
463:
464: if(srcPtr+trailingBytes>=srcEnd){
465: return 0; // not enough bytes in source string for reading
466: }
467:
468: uint tmpVal=0;
469: switch(trailingBytes){
470: case 5: tmpVal+=*srcPtr++; tmpVal<<=6;
471: case 4: tmpVal+=*srcPtr++; tmpVal<<=6;
472: case 3: tmpVal+=*srcPtr++; tmpVal<<=6;
473: case 2: tmpVal+=*srcPtr++; tmpVal<<=6;
474: case 1: tmpVal+=*srcPtr++; tmpVal<<=6;
475: case 0: tmpVal+=*srcPtr++;
476: }
477:
478: tmpVal-=gUTFOffsets[trailingBytes];
479: UTF8Char=tmpVal;
480:
481: return trailingBytes+1;
482: }
483:
1.70 misha 484: // skip UTF8 char and return length of this char (in bytes)
485: static unsigned int skipUTF8Char(const XMLByte*& srcPtr, const XMLByte* srcEnd){
1.62 misha 486: if(!srcPtr || !*srcPtr || srcPtr>=srcEnd)
487: return 0;
488:
1.63 misha 489: unsigned int trailingBytes=gUTFBytes[*srcPtr]+1;
490: srcPtr+=trailingBytes;
1.62 misha 491:
492: return trailingBytes;
1.61 misha 493: }
494:
1.70 misha 495: // read non-UTF8 char, and return number of bytes needed for store this char in UTF8
1.61 misha 496: static unsigned int readChar(const XMLByte*& srcPtr, const XMLByte* srcEnd, XMLByte& firstByte, XMLCh& UTF8Char, const Charset::Tables& tables){
1.60 misha 497: if(!srcPtr || !*srcPtr || srcPtr>=srcEnd)
498: return 0;
499:
500: firstByte=*srcPtr++;
501: UTF8Char=tables.fromTable[firstByte];
502:
503: if(UTF8Char<0x80)
504: return 1;
505: else if(UTF8Char<0x800)
506: return 2;
507: else if(UTF8Char<0x10000)
508: return 3;
509: else if(UTF8Char<0x200000)
510: return 4;
511: else if(UTF8Char<0x4000000)
512: return 5;
513: else if(UTF8Char<= 0x7FFFFFFF)
514: return 6;
515:
516: // will use the replacement character '?'
517: firstByte=0;
518: return 1;
519: }
520:
1.70 misha 521: static int escapeUTF8(const XMLByte* srcData, size_t& srcLen,
1.80 misha 522: XMLByte* toFill, size_t& toFillLen) {
1.60 misha 523: const XMLByte* srcPtr=srcData;
524: XMLByte* outPtr=toFill;
525: XMLByte* outEnd=toFill+toFillLen;
526: // loop until we either run out of input data, or room to store
1.81 ! misha 527: for(UTF8_string_iterator i((XMLByte *)srcPtr, srcLen); (outPtr < outEnd) && i.has_next(); ){
! 528: if(i.getCharSize()==1){
! 529: if(isEscaped(i.getFirstByte())) // %XX
! 530: outPtr+=sprintf((char*)outPtr, "%%%02X", i.getFirstByte());
1.60 misha 531: else
1.81 ! misha 532: *outPtr++=i.getFirstByte();
1.60 misha 533: } else
1.81 ! misha 534: outPtr+=sprintf((char*)outPtr, "%%u%04X", i.next()); // %uXXXX
1.60 misha 535: }
536: // Update the bytes eaten
537: srcLen=srcPtr-srcData;
538:
539: // Return the characters read
540: toFillLen=outPtr-toFill;
541:
542: return 0;
543: }
544:
545: static int escape(const XMLByte* srcData, size_t& srcLen,
546: XMLByte *toFill, size_t& toFillLen,
547: const Charset::Tables& tables) {
548: const XMLByte* srcPtr=srcData;
549: const XMLByte* srcEnd=srcData+srcLen;
550: XMLByte* outPtr=toFill;
551: XMLByte firstByte;
552: XMLCh UTF8Char;
553: uint charSize;
554:
555: while(charSize=readChar(srcPtr, srcEnd, firstByte, UTF8Char, tables)){
556: if(charSize==1){
557: if(firstByte){
1.70 misha 558: if(isEscaped(firstByte)) // %XX
1.60 misha 559: outPtr+=sprintf((char*)outPtr, "%%%02X", firstByte);
560: else
561: *outPtr++=firstByte;
562: } else // add replacement char '?'
563: *outPtr++='?';
564: } else
565: outPtr+=sprintf((char*)outPtr, "%%u%04X", UTF8Char); // %uXXXX
566: }
567:
568: // Update the bytes eaten
569: srcLen = srcPtr - srcData;
570:
571: // Return the characters read
572: toFillLen = outPtr - toFill;
573:
574: return 0;
575: }
576:
577:
578: String::C Charset::escape(const String::C src, const Charset& source_charset){
579: size_t src_length=src.length;
580: if(!src_length)
581: return String::C("", 0);
582:
583: #ifdef PRECALCULATE_DEST_LENGTH
584: size_t dest_length=0;
585:
586: if(source_charset.isUTF8()){
1.81 ! misha 587: for(UTF8_string_iterator i((XMLByte *)src.str, src_length); i.has_next(); ){
! 588: if(i.getCharSize()==1)
! 589: dest_length+=!isEscaped(i.getFirstByte())?1/*as-is*/:3/*%XX*/;
1.60 misha 590: else
1.81 ! misha 591: dest_length+=6/*%uXXXX*/;
1.60 misha 592: }
593: } else {
1.81 ! misha 594: const XMLByte* srcPtr=(XMLByte*)src.str;
! 595: const XMLByte* srcEnd=srcPtr+src_length;
! 596: XMLByte firstByte;
! 597: XMLCh UTF8Char;
1.60 misha 598: while(uint charSize=readChar(srcPtr, srcEnd, firstByte, UTF8Char, source_charset.tables)){
599: if(charSize==1)
1.70 misha 600: dest_length+=(!firstByte/*replacement char '?'*/ || !isEscaped(firstByte))?1:3/*'%XX'*/;
1.60 misha 601: else
602: dest_length+=6; // '%uXXXX'
603: }
604: }
605: #else
606: size_t dest_length=src_length*6; // enough for %uXXXX but too memory-hungry
607: #endif
608:
609: //throw Exception(0,0,"%u",dest_length);
610:
611: #ifndef NDEBUG
612: size_t saved_dest_length=dest_length;
613: #endif
614: XMLByte *dest_body=new(PointerFreeGC) XMLByte[dest_length+1/*for terminator*/];
615:
616: int status;
617: if(source_charset.isUTF8()){
1.70 misha 618: status=::escapeUTF8((XMLByte *)src.str, src_length, dest_body, dest_length);
1.60 misha 619: } else {
620: status=::escape((XMLByte *)src.str, src_length, dest_body, dest_length, source_charset.tables);
621: }
622:
623: if(status<0)
624: throw Exception(0,
625: 0,
1.70 misha 626: "Charset::escape buffer overflow");
1.60 misha 627:
628: assert(dest_length<=saved_dest_length);
629: dest_body[dest_length]=0; // terminator
630: return String::C((char*)dest_body, dest_length);
631: }
632:
1.64 misha 633: String::Body Charset::escape(const String::Body src, const Charset& source_charset) {
634: const char *src_ptr=src.cstr();
635: size_t src_size=strlen(src_ptr);
636:
1.70 misha 637: String::C dest=Charset::escape(String::C(src_ptr, src_size), source_charset);
1.64 misha 638:
1.77 misha 639: return String::Body(dest.length ? dest.str:0);
1.64 misha 640: }
641:
642: String& Charset::escape(const String& src, const Charset& source_charset) {
1.72 misha 643: if(src.is_empty())
1.73 misha 644: return *new String();
1.64 misha 645:
646: return *new String(escape((String::Body)src, source_charset), String::L_CLEAN);
647: }
1.60 misha 648:
1.35 paf 649: const String::C Charset::transcodeToUTF8(const String::C src) const {
1.71 misha 650: int src_length=src.length;
1.60 misha 651:
652: #ifdef PRECALCULATE_DEST_LENGTH
1.71 misha 653: int dest_length=0;
1.60 misha 654: const XMLByte* srcPtr=(XMLByte*)src.str;
655: const XMLByte* srcEnd=srcPtr+src_length;
1.69 misha 656: XMLByte firstByte;
657: XMLCh UTF8Char;
658: while(uint charSize=readChar(srcPtr, srcEnd, firstByte, UTF8Char, tables))
1.60 misha 659: dest_length+=charSize;
660: #else
1.71 misha 661: int dest_length=src_length*6; // so that surly enough (max utf8 seq len=6) but too memory-hyngry
1.60 misha 662: #endif
663:
664: //throw Exception(0,0,"%u",dest_length);
665:
1.35 paf 666: #ifndef NDEBUG
1.71 misha 667: int saved_dest_length=dest_length;
1.35 paf 668: #endif
669: XMLByte *dest_body=new(PointerFreeGC) XMLByte[dest_length+1/*for terminator*/];
1.11 paf 670:
671: if(::transcodeToUTF8(
1.35 paf 672: (XMLByte *)src.str, src_length,
673: dest_body, dest_length,
1.11 paf 674: tables)<0)
1.43 paf 675: throw Exception(0,
1.10 paf 676: 0,
1.11 paf 677: "Charset::transcodeToUTF8 buffer overflow");
1.10 paf 678:
1.60 misha 679: assert(dest_length<=saved_dest_length);
680: dest_body[dest_length]=0; // terminator
1.35 paf 681: return String::C((char*)dest_body, dest_length);
1.10 paf 682: }
1.38 paf 683:
684: static XMLCh change_case_UTF8(const XMLCh src, const Charset::UTF8CaseTable& table) {
1.80 misha 685: int lo = 0;
686: int hi = table.size - 1;
1.39 paf 687: while(lo<=hi) {
1.38 paf 688: // Calc the mid point of the low and high offset.
1.39 paf 689: const unsigned int i = (lo + hi) / 2;
690:
691: XMLCh cur=table.records[i].from;
692: if(src==cur)
693: return table.records[i].to;
694: if(src>cur)
695: lo = i+1;
1.38 paf 696: else
1.39 paf 697: hi = i-1;
698: }
699:
700: // not found
1.38 paf 701: return src;
702: }
703:
1.58 misha 704: static void store_UTF8(XMLCh src, XMLByte*& outPtr){
1.38 paf 705: if(!src) {
706: // use the replacement character
707: *outPtr++= '?';
708: return;
709: }
710:
711: // Figure out how many bytes we need
712: unsigned int encodedBytes;
713: if(src<0x80)
714: encodedBytes = 1;
715: else if(src<0x800)
716: encodedBytes = 2;
717: else if(src<0x10000)
718: encodedBytes = 3;
719: else if(src<0x200000)
720: encodedBytes = 4;
721: else if(src<0x4000000)
722: encodedBytes = 5;
723: else if(src<= 0x7FFFFFFF)
724: encodedBytes = 6;
725: else {
726: // use the replacement character
727: *outPtr++= '?';
728: return;
729: }
730:
731: // And spit out the bytes. We spit them out in reverse order
732: // here, so bump up the output pointer and work down as we go.
733: outPtr+= encodedBytes;
734: switch(encodedBytes) {
735: case 6: *--outPtr = XMLByte((src | 0x80UL) & 0xBFUL);
736: src>>= 6;
737: case 5: *--outPtr = XMLByte((src | 0x80UL) & 0xBFUL);
738: src>>= 6;
739: case 4: *--outPtr = XMLByte((src | 0x80UL) & 0xBFUL);
740: src>>= 6;
741: case 3: *--outPtr = XMLByte((src | 0x80UL) & 0xBFUL);
742: src>>= 6;
743: case 2: *--outPtr = XMLByte((src | 0x80UL) & 0xBFUL);
744: src>>= 6;
745: case 1: *--outPtr = XMLByte(src | gFirstByteMark[encodedBytes]);
746: }
747:
748: // Add the encoded bytes back in again to indicate we've eaten them
749: outPtr+= encodedBytes;
750: }
751:
752: static void change_case_UTF8(XMLCh src, XMLByte*& outPtr,
753: const Charset::UTF8CaseTable& table) {
754: store_UTF8(change_case_UTF8(src, table), outPtr);
755: };
1.44 paf 756: void change_case_UTF8(const XMLByte* srcData, size_t srcLen,
757: XMLByte* toFill, size_t toFillLen,
758: const Charset::UTF8CaseTable& table) {
1.38 paf 759: const XMLByte* srcPtr=srcData;
1.44 paf 760: const XMLByte* srcEnd=srcData+srcLen;
1.38 paf 761: XMLByte* outPtr=toFill;
1.44 paf 762: XMLByte* outEnd=toFill+toFillLen;
763:
764: // We now loop until we either run out of input data, or room to store
765: while ((srcPtr < srcEnd) && (outPtr < outEnd)) {
766: // Get the next leading byte out
767: const XMLByte firstByte =* srcPtr;
1.38 paf 768:
1.60 misha 769: if(firstByte<=127) {
1.38 paf 770: change_case_UTF8(firstByte, outPtr, table);
771: srcPtr++;
772: continue;
773: }
774:
775: // See how many trailing src bytes this sequence is going to require
776: const unsigned int trailingBytes = gUTFBytes[firstByte];
777:
778: // Looks ok, so lets build up the value
779: uint tmpVal=0;
780: switch(trailingBytes) {
781: case 5: tmpVal+=*srcPtr++; tmpVal<<=6;
782: case 4: tmpVal+=*srcPtr++; tmpVal<<=6;
783: case 3: tmpVal+=*srcPtr++; tmpVal<<=6;
784: case 2: tmpVal+=*srcPtr++; tmpVal<<=6;
785: case 1: tmpVal+=*srcPtr++; tmpVal<<=6;
786: case 0: tmpVal+=*srcPtr++;
787: break;
788:
789: default:
790: throw Exception(0,
791: 0,
792: "change_case_UTF8 error: wrong trailingBytes value(%d)", trailingBytes);
793: }
794: tmpVal-=gUTFOffsets[trailingBytes];
795:
796: // If it will fit into a single char, then put it in. Otherwise
797: // fail [*encode it as a surrogate pair. If its not valid, use the
798: // replacement char.*]
799: if(!(tmpVal & 0xFFFF0000))
800: change_case_UTF8(tmpVal, outPtr, table);
801: else
802: throw Exception(0,
803: 0,
804: "change_case_UTF8 error: too big tmpVal(0x%08X)", tmpVal);
805: }
806:
807: if(srcPtr!=outPtr)
808: throw Exception(0,
809: 0,
810: "change_case_UTF8 error: end pointers do not match");
811: }
812:
1.60 misha 813: static size_t getDecNumLength(XMLCh UTF8Char){
814: return
815: (UTF8Char < 100)
816: ?2
817: :(UTF8Char < 1000)
818: ?3
819: :(UTF8Char < 10000)
820: ?4
821: :5;
822: }
1.38 paf 823:
1.35 paf 824: const String::C Charset::transcodeFromUTF8(const String::C src) const {
1.60 misha 825: #ifdef PRECALCULATE_DEST_LENGTH
1.71 misha 826: int dest_length=0;
1.81 ! misha 827: for(UTF8_string_iterator i((XMLByte *)src.str, src.length); i.has_next(); ){
! 828: if(i.getCharSize()==1)
1.60 misha 829: dest_length++;
830: else
1.81 ! misha 831: dest_length+=(i.next() & 0xFFFF0000)
! 832: ?i.getCharSize()*3 // '%XX' for each byte
! 833: :(xlatOneTo(i.next(), tables, 0)!=0)
1.60 misha 834: ?1 // can convert it to single char
1.81 ! misha 835: :getDecNumLength(i.next())+3; // &#XX; - &#XXXXX;
1.60 misha 836: }
837: #else
838: // so that surly enough, "&#XXX;" has max ratio (huh? 8 bytes needed for '&#XXXXX;')
1.81 ! misha 839: int dest_length=src.length*6;
1.60 misha 840: #endif
841:
1.35 paf 842: #ifndef NDEBUG
1.71 misha 843: int saved_dest_length=dest_length;
1.35 paf 844: #endif
845: XMLByte *dest_body=new(PointerFreeGC) XMLByte[dest_length+1/*for terminator*/];
1.11 paf 846:
847: if(::transcodeFromUTF8(
1.81 ! misha 848: (XMLByte *)src.str, (int&)src.length,
1.35 paf 849: dest_body, dest_length,
1.11 paf 850: tables)<0)
1.43 paf 851: throw Exception(0,
1.10 paf 852: 0,
1.35 paf 853: "Charset::transcodeFromUTF8 buffer overflow");
1.10 paf 854:
1.60 misha 855: assert(dest_length<=saved_dest_length);
856: dest_body[dest_length]=0; // terminator
1.35 paf 857: return String::C((char*)dest_body, dest_length);
1.1 paf 858: }
859:
860: /// transcode using both charsets
1.35 paf 861: const String::C Charset::transcodeToCharset(const String::C src,
1.80 misha 862: const Charset& dest_charset) const {
1.35 paf 863: if(&dest_charset==this)
864: return src;
865: else {
866: size_t dest_length=src.length;
867: XMLByte* dest_body=new(PointerFreeGC) XMLByte[dest_length+1/*for terminator*/];
868:
869: XMLByte* output=dest_body;
870: const XMLByte* input=(XMLByte *)src.str;
871: while(XMLCh c=*input++) {
872: XMLCh curVal = tables.fromTable[c];
873: *output++=curVal?
874: xlatOneTo(curVal, dest_charset.tables, '?') // OK
875: :'?'; // use the replacement character
1.6 paf 876: }
1.1 paf 877:
1.35 paf 878: dest_body[dest_length]=0; // terminator
879: return String::C((char*)dest_body, dest_length);
1.6 paf 880: }
1.1 paf 881: }
882:
1.58 misha 883: void Charset::store_Char(XMLByte*& outPtr, XMLCh src, XMLByte not_found){
1.59 misha 884: if(isUTF8())
1.58 misha 885: store_UTF8(src, outPtr);
1.59 misha 886: else if(char ch=xlatOneTo(src, tables, not_found))
1.58 misha 887: *outPtr++=ch;
1.57 misha 888: }
889:
1.1 paf 890: #ifdef XML
1.10 paf 891:
1.35 paf 892: static const Charset::Tables* tables[MAX_CHARSETS];
893:
1.46 paf 894: #ifdef PA_PATCHED_LIBXML_BACKWARD
895:
896: #define declareXml256ioFuncs(i) \
897: static int xml256CharEncodingInputFunc##i( \
898: unsigned char *out, int *outlen, \
899: const unsigned char *in, int *inlen, void*) { \
900: return transcodeToUTF8( \
1.71 misha 901: in, *inlen, \
902: out, *outlen, \
1.46 paf 903: *tables[i]); \
904: } \
905: static int xml256CharEncodingOutputFunc##i( \
906: unsigned char *out, int *outlen, \
907: const unsigned char *in, int *inlen, void*) { \
908: return transcodeFromUTF8( \
1.71 misha 909: in, *inlen, \
910: out, *outlen, \
1.46 paf 911: *tables[i]); \
912: }
913:
914: #else
915:
1.35 paf 916: #define declareXml256ioFuncs(i) \
917: static int xml256CharEncodingInputFunc##i( \
918: unsigned char *out, int *outlen, \
919: const unsigned char *in, int *inlen) { \
920: return transcodeToUTF8( \
1.71 misha 921: in, *inlen, \
922: out, *outlen, \
1.35 paf 923: *tables[i]); \
924: } \
925: static int xml256CharEncodingOutputFunc##i( \
926: unsigned char *out, int *outlen, \
927: const unsigned char *in, int *inlen) { \
928: return transcodeFromUTF8( \
1.71 misha 929: in, *inlen, \
930: out, *outlen, \
1.35 paf 931: *tables[i]); \
932: }
933:
1.46 paf 934: #endif
935:
936:
1.35 paf 937: declareXml256ioFuncs(0) declareXml256ioFuncs(1)
938: declareXml256ioFuncs(2) declareXml256ioFuncs(3)
939: declareXml256ioFuncs(4) declareXml256ioFuncs(5)
940: declareXml256ioFuncs(6) declareXml256ioFuncs(7)
941: declareXml256ioFuncs(8) declareXml256ioFuncs(9)
942:
943: static xmlCharEncodingInputFunc inputFuncs[MAX_CHARSETS]={
944: xml256CharEncodingInputFunc0, xml256CharEncodingInputFunc1,
945: xml256CharEncodingInputFunc2, xml256CharEncodingInputFunc3,
946: xml256CharEncodingInputFunc4, xml256CharEncodingInputFunc5,
947: xml256CharEncodingInputFunc6, xml256CharEncodingInputFunc7,
948: xml256CharEncodingInputFunc8, xml256CharEncodingInputFunc9
949: };
950: static xmlCharEncodingOutputFunc outputFuncs[MAX_CHARSETS]={
951: xml256CharEncodingOutputFunc0, xml256CharEncodingOutputFunc1,
952: xml256CharEncodingOutputFunc2, xml256CharEncodingOutputFunc3,
953: xml256CharEncodingOutputFunc4, xml256CharEncodingOutputFunc5,
954: xml256CharEncodingOutputFunc6, xml256CharEncodingOutputFunc7,
955: xml256CharEncodingOutputFunc8, xml256CharEncodingOutputFunc9
956: };
957: static size_t handlers_count=0;
1.10 paf 958:
959: void Charset::addEncoding(char *name_cstr) {
1.35 paf 960: if(handlers_count==MAX_CHARSETS)
961: throw Exception(0,
962: 0,
963: "already allocated %d handlers, no space for new encoding '%s'",
964: MAX_CHARSETS, name_cstr);
965:
1.45 paf 966: xmlCharEncodingHandler* handler=new(UseGC) xmlCharEncodingHandler;
1.35 paf 967: {
968: handler->name=name_cstr;
969: handler->input=inputFuncs[handlers_count];
970: handler->output=outputFuncs[handlers_count];
971: ::tables[handlers_count]=&tables;
972: handlers_count++;
973: }
1.10 paf 974:
975: xmlRegisterCharEncodingHandler(handler);
1.35 paf 976:
1.10 paf 977: }
978:
1.37 paf 979: void Charset::initTranscoder(const String::Body NAME, const char* name_cstr) {
1.15 paf 980: ftranscoder=xmlFindCharEncodingHandler(name_cstr);
1.35 paf 981: transcoder(NAME); // check right way
1.15 paf 982: }
983:
1.37 paf 984: xmlCharEncodingHandler& Charset::transcoder(const String::Body NAME) {
1.15 paf 985: if(!ftranscoder)
1.56 misha 986: throw Exception(PARSER_RUNTIME,
1.35 paf 987: new String(NAME, String::L_TAINTED),
1.10 paf 988: "unsupported encoding");
1.35 paf 989: return *ftranscoder;
1.10 paf 990: }
991:
1.54 paf 992: String::C Charset::transcode_cstr(const xmlChar* s) {
1.13 paf 993: if(!s)
1.35 paf 994: return String::C("", 0);
1.8 paf 995:
1.35 paf 996: int inlen=strlen((const char*)s);
1.51 paf 997: int outlen=inlen*6/*strlen("ÿ")*/; // max
1.35 paf 998: #ifndef NDEBUG
999: int saved_outlen=outlen;
1000: #endif
1001: char *out=new(PointerFreeGC) char[outlen+1];
1.8 paf 1002:
1.30 paf 1003: int error;
1.35 paf 1004: if(xmlCharEncodingOutputFunc output=transcoder(FNAME).output) {
1.30 paf 1005: error=output(
1.17 paf 1006: (unsigned char*)out, &outlen,
1.46 paf 1007: (const unsigned char*)s, &inlen
1008: #ifdef PA_PATCHED_LIBXML_BACKWARD
1009: ,0
1010: #endif
1011: );
1.30 paf 1012: } else {
1013: memcpy(out, s, outlen=inlen);
1014: error=0;
1015: }
1016: if(error<0)
1.23 paf 1017: throw Exception(0,
1.8 paf 1018: 0,
1.30 paf 1019: "transcode_cstr failed (%d)", error);
1.8 paf 1020:
1.35 paf 1021: assert(outlen<=saved_outlen); out[outlen]=0;
1022: return String::C(out, outlen);
1.14 paf 1023: }
1.54 paf 1024: const String& Charset::transcode(const xmlChar* s) {
1.35 paf 1025: String::C cstr=transcode_cstr(s);
1.75 misha 1026: return *new String(cstr.str, String::L_TAINTED);
1.1 paf 1027: }
1028:
1.8 paf 1029: /// @test less memory using -maybe- xmlParserInputBufferCreateMem
1.35 paf 1030: xmlChar* Charset::transcode_buf2xchar(const char* buf, size_t buf_size) {
1031: xmlChar* out;
1.30 paf 1032: int outlen;
1033: int error;
1.35 paf 1034: #ifndef NDEBUG
1035: int saved_outlen;
1036: #endif
1037: if(xmlCharEncodingInputFunc input=transcoder(FNAME).input) {
1.51 paf 1038: outlen=buf_size*6/*max UTF8 bytes per char*/;
1.35 paf 1039: #ifndef NDEBUG
1040: saved_outlen=outlen;
1041: #endif
1.47 paf 1042: out=(xmlChar*)xmlMalloc(outlen+1);
1.30 paf 1043: error=input(
1.17 paf 1044: out, &outlen,
1.46 paf 1045: (const unsigned char*)buf, (int*)&buf_size
1046: #ifdef PA_PATCHED_LIBXML_BACKWARD
1047: ,0
1048: #endif
1049: );
1.30 paf 1050: } else {
1051: outlen=buf_size;
1.35 paf 1052: #ifndef NDEBUG
1053: saved_outlen=outlen;
1054: #endif
1055: out=(xmlChar*)xmlMalloc(outlen+1);
1.30 paf 1056: memcpy(out, buf, outlen);
1057: error=0;
1058: }
1.17 paf 1059:
1.30 paf 1060: if(error<0)
1.23 paf 1061: throw Exception(0,
1.8 paf 1062: 0,
1.30 paf 1063: "transcode_buf failed (%d)", error);
1.8 paf 1064:
1.35 paf 1065: assert(outlen<=saved_outlen); out[outlen]=0;
1066: return out;
1.24 paf 1067: }
1.1 paf 1068:
1.79 misha 1069: xmlChar* Charset::transcode(const String& s) {
1070: String::Body sbody=s.cstr_to_string_body_untaint(String::L_AS_IS);
1071: return transcode_buf2xchar(sbody.cstr(), sbody.length());
1.1 paf 1072: }
1.35 paf 1073:
1.79 misha 1074: xmlChar* Charset::transcode(const String::Body s) {
1075: return transcode_buf2xchar(s.cstr(), s.length());
1.35 paf 1076: }
1.36 paf 1077: #endif
1.34 paf 1078:
1.37 paf 1079: String::Body Charset::transcode(const String::Body src,
1.34 paf 1080: const Charset& source_transcoder,
1.35 paf 1081: const Charset& dest_transcoder) {
1.34 paf 1082:
1.35 paf 1083: const char *src_ptr=src.cstr();
1.34 paf 1084: size_t src_size=strlen(src_ptr);
1085:
1.77 misha 1086: String::C dest=Charset::transcode(String::C(src_ptr, src_size), source_transcoder, dest_transcoder);
1.34 paf 1087:
1.77 misha 1088: return String::Body(dest.length ? dest.str:0);
1.35 paf 1089: }
1090:
1091: String& Charset::transcode(const String& src,
1092: const Charset& source_transcoder,
1093: const Charset& dest_transcoder) {
1.72 misha 1094: if(src.is_empty())
1.73 misha 1095: return *new String();
1.34 paf 1096:
1.37 paf 1097: return *new String(transcode((String::Body)src, source_transcoder, dest_transcoder), String::L_CLEAN);
1.34 paf 1098: }
1099:
1.35 paf 1100: void Charset::transcode(ArrayString& src,
1.34 paf 1101: const Charset& source_transcoder,
1.35 paf 1102: const Charset& dest_transcoder) {
1103: for(size_t i=0; i<src.count(); i++)
1104: src.put(i, &transcode(*src[i], source_transcoder, dest_transcoder));
1.34 paf 1105: }
1106:
1107: #ifndef DOXYGEN
1108: struct Transcode_pair_info {
1109: const Charset* source_transcoder;
1110: const Charset* dest_transcoder;
1111: };
1112: #endif
1.76 misha 1113: static void transcode_pair(HashStringValue::key_type /*akey*/,
1.37 paf 1114: String::Body& avalue,
1.35 paf 1115: Transcode_pair_info* info) {
1116: avalue=Charset::transcode(avalue,
1117: *info->source_transcoder,
1118: *info->dest_transcoder);
1.34 paf 1119: }
1.61 misha 1120:
1.35 paf 1121: void Charset::transcode(HashStringString& src,
1.34 paf 1122: const Charset& source_transcoder,
1.35 paf 1123: const Charset& dest_transcoder) {
1124: Transcode_pair_info info={&source_transcoder, &dest_transcoder};
1.55 paf 1125: src.for_each_ref<Transcode_pair_info*>(transcode_pair, &info);
1.34 paf 1126: }
1.61 misha 1127:
1128: size_t getUTF8BytePos(const XMLByte* srcBegin, const XMLByte* srcEnd, size_t charPos){
1129: const XMLByte* ptr=srcBegin;
1.70 misha 1130: while(charPos-- && skipUTF8Char(ptr, srcEnd));
1.61 misha 1131:
1132: return ptr-srcBegin;
1133: }
1134:
1135: size_t getUTF8CharPos(const XMLByte* srcBegin, const XMLByte* srcEnd, size_t bytePos){
1136: size_t charPos=0;
1137: const XMLByte* ptr=srcBegin;
1138: const XMLByte* ptrEnd=srcBegin+bytePos;
1.70 misha 1139: while(skipUTF8Char(ptr, srcEnd)){
1.61 misha 1140: if(ptr>ptrEnd)
1141: return charPos;
1142: charPos++;
1143: }
1144:
1145: // scan till end but position in bytes still too low
1146: throw Exception(0,
1147: 0,
1148: "Error convertion byte pos to char pos");
1149: }
1150:
1151: size_t lengthUTF8(const XMLByte* srcBegin, const XMLByte* srcEnd){
1152: size_t size=0;
1.70 misha 1153: while(skipUTF8Char(srcBegin, srcEnd))
1.61 misha 1154: size++;
1155:
1156: return size;
1157: }
1.80 misha 1158:
1159: bool UTF8_string_iterator::has_next(){
1160: fcharSize=readUTF8Char(fsrcPtr, fsrcEnd, ffirstByte, fUTF8Char);
1161: return fcharSize!=0;
1162: }
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