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/*
* Copyright (C) 2004-2012 Geometer Plus <[email protected]>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
#include <cctype>
#include <ZLInputStream.h>
#include "TxtReader.h"
class TxtReaderCore {
public:
TxtReaderCore(TxtReader &reader);
virtual void readDocument(ZLInputStream &stream);
protected:
TxtReader &myReader;
};
class TxtReaderCoreUtf16 : public TxtReaderCore {
public:
TxtReaderCoreUtf16(TxtReader &reader);
void readDocument(ZLInputStream &stream);
protected:
virtual char getAscii(const char *ptr) = 0;
virtual void setAscii(char *ptr, char ascii) = 0;
};
class TxtReaderCoreUtf16LE : public TxtReaderCoreUtf16 {
public:
TxtReaderCoreUtf16LE(TxtReader &reader);
protected:
char getAscii(const char *ptr);
void setAscii(char *ptr, char ascii);
};
class TxtReaderCoreUtf16BE : public TxtReaderCoreUtf16 {
public:
TxtReaderCoreUtf16BE(TxtReader &reader);
protected:
char getAscii(const char *ptr);
void setAscii(char *ptr, char ascii);
};
TxtReader::TxtReader(const std::string &encoding) : EncodedTextReader(encoding) {
if (ZLEncodingConverter::UTF16 == encoding) {
myCore = new TxtReaderCoreUtf16LE(*this);
} else if (ZLEncodingConverter::UTF16BE == encoding) {
myCore = new TxtReaderCoreUtf16BE(*this);
} else {
myCore = new TxtReaderCore(*this);
}
}
TxtReader::~TxtReader() {
}
void TxtReader::readDocument(ZLInputStream &stream) {
if (!stream.open()) {
return;
}
startDocumentHandler();
myCore->readDocument(stream);
endDocumentHandler();
stream.close();
}
TxtReaderCore::TxtReaderCore(TxtReader &reader) : myReader(reader) {
}
TxtReaderCoreUtf16::TxtReaderCoreUtf16(TxtReader &reader) : TxtReaderCore(reader) {
}
void TxtReaderCore::readDocument(ZLInputStream &stream) {
const std::size_t BUFSIZE = 2048;
char *buffer = new char[BUFSIZE];
std::string str;
std::size_t length;
do {
length = stream.read(buffer, BUFSIZE);
char *start = buffer;
const char *end = buffer + length;
for (char *ptr = start; ptr != end; ++ptr) {
if (*ptr == '\n' || *ptr == '\r') {
bool skipNewLine = false;
if (*ptr == '\r' && (ptr + 1) != end && *(ptr + 1) == '\n') {
skipNewLine = true;
*ptr = '\n';
}
if (start != ptr) {
str.erase();
myReader.myConverter->convert(str, start, ptr + 1);
myReader.characterDataHandler(str);
}
if (skipNewLine) {
++ptr;
}
start = ptr + 1;
myReader.newLineHandler();
} else if (((*ptr) & 0x80) == 0 && std::isspace((unsigned char)*ptr)) {
if (*ptr != '\t') {
*ptr = ' ';
}
} else {
}
}
if (start != end) {
str.erase();
myReader.myConverter->convert(str, start, end);
myReader.characterDataHandler(str);
}
} while (length == BUFSIZE);
delete[] buffer;
}
void TxtReaderCoreUtf16::readDocument(ZLInputStream &stream) {
const std::size_t BUFSIZE = 2048;
char *buffer = new char[BUFSIZE];
std::string str;
std::size_t length;
do {
length = stream.read(buffer, BUFSIZE);
char *start = buffer;
const char *end = buffer + length;
for (char *ptr = start; ptr < end; ptr += 2) {
const char chr = getAscii(ptr);
if (chr == '\n' || chr == '\r') {
bool skipNewLine = false;
if (chr == '\r' && ptr + 2 != end && getAscii(ptr + 2) == '\n') {
skipNewLine = true;
setAscii(ptr, '\n');
}
if (start != ptr) {
str.erase();
myReader.myConverter->convert(str, start, ptr + 2);
myReader.characterDataHandler(str);
}
if (skipNewLine) {
ptr += 2;
}
start = ptr + 2;
myReader.newLineHandler();
} else if (chr != 0 && ((*ptr) & 0x80) == 0 && std::isspace(chr)) {
if (chr != '\t') {
setAscii(ptr, ' ');
}
}
}
if (start != end) {
str.erase();
myReader.myConverter->convert(str, start, end);
myReader.characterDataHandler(str);
}
} while (length == BUFSIZE);
delete[] buffer;
}
TxtReaderCoreUtf16LE::TxtReaderCoreUtf16LE(TxtReader &reader) : TxtReaderCoreUtf16(reader) {
}
char TxtReaderCoreUtf16LE::getAscii(const char *ptr) {
return *(ptr + 1) == '\0' ? *ptr : '\0';
}
void TxtReaderCoreUtf16LE::setAscii(char *ptr, char ascii) {
*ptr = ascii;
}
TxtReaderCoreUtf16BE::TxtReaderCoreUtf16BE(TxtReader &reader) : TxtReaderCoreUtf16(reader) {
}
char TxtReaderCoreUtf16BE::getAscii(const char *ptr) {
return *ptr == '\0' ? *(ptr + 1) : '\0';
}
void TxtReaderCoreUtf16BE::setAscii(char *ptr, char ascii) {
*(ptr + 1) = ascii;
}
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