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QGIS/external/libdxfrw/intern/drw_textcodec.cpp
Nyall Dawson 50de3d71e7 Add pending upstream fix to remove warning
2021-08-06 06:52:50 +10:00

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#include "drw_textcodec.h"
#include <sstream>
#include <iomanip>
#include <algorithm>
#include "../drw_base.h"
#include "drw_cptables.h"
#include "drw_cptable932.h"
#include "drw_cptable936.h"
#include "drw_cptable949.h"
#include "drw_cptable950.h"
DRW_TextCodec::DRW_TextCodec()
: version{DRW::AC1021}
, conv( new DRW_Converter(nullptr, 0) )
{
}
DRW_TextCodec::~DRW_TextCodec() = default;
void DRW_TextCodec::setVersion(int v, bool dxfFormat){
if (v == DRW::AC1009 || v == DRW::AC1006) {
version = DRW::AC1009;
cp = "ANSI_1252";
setCodePage(&cp, dxfFormat);
} else if (v == DRW::AC1012 || v == DRW::AC1014
|| v == DRW::AC1015 || v == DRW::AC1018) {
version = DRW::AC1015;
// if (cp.empty()) { //codepage not set, initialize
cp = "ANSI_1252";
setCodePage(&cp, dxfFormat);
// }
} else {
version = DRW::AC1021;
if (dxfFormat)
cp = "UTF-8";//RLZ: can be UCS2 or UTF-16 16bits per char
else
cp = "UTF-16";//RLZ: can be UCS2 or UTF-16 16bits per char
setCodePage(&cp, dxfFormat);
}
}
void DRW_TextCodec::setVersion(std::string *v, bool dxfFormat){
std::string versionStr = *v;
if (versionStr == "AC1009" || versionStr == "AC1006") {
setVersion(DRW::AC1009, dxfFormat);
} else if (versionStr == "AC1012" || versionStr == "AC1014"
|| versionStr == "AC1015" || versionStr == "AC1018") {
setVersion(DRW::AC1015, dxfFormat);
}
setVersion(DRW::AC1021, dxfFormat);
}
void DRW_TextCodec::setCodePage(std::string *c, bool dxfFormat){
cp = correctCodePage(*c);
conv.reset();
if (version == DRW::AC1009 || version == DRW::AC1015) {
if (cp == "ANSI_874")
conv.reset( new DRW_ConvTable(DRW_Table874, CPLENGTHCOMMON) );
else if (cp == "ANSI_932")
conv.reset( new DRW_Conv932Table() );
else if (cp == "ANSI_936")
conv.reset( new DRW_ConvDBCSTable(DRW_Table936, DRW_LeadTable936,
DRW_DoubleTable936, CPLENGTH936) );
else if (cp == "ANSI_949")
conv.reset( new DRW_ConvDBCSTable(DRW_Table949, DRW_LeadTable949,
DRW_DoubleTable949, CPLENGTH949) );
else if (cp == "ANSI_950")
conv.reset( new DRW_ConvDBCSTable(DRW_Table950, DRW_LeadTable950,
DRW_DoubleTable950, CPLENGTH950) );
else if (cp == "ANSI_1250")
conv.reset( new DRW_ConvTable(DRW_Table1250, CPLENGTHCOMMON) );
else if (cp == "ANSI_1251")
conv.reset( new DRW_ConvTable(DRW_Table1251, CPLENGTHCOMMON) );
else if (cp == "ANSI_1253")
conv.reset( new DRW_ConvTable(DRW_Table1253, CPLENGTHCOMMON) );
else if (cp == "ANSI_1254")
conv.reset( new DRW_ConvTable(DRW_Table1254, CPLENGTHCOMMON) );
else if (cp == "ANSI_1255")
conv.reset( new DRW_ConvTable(DRW_Table1255, CPLENGTHCOMMON) );
else if (cp == "ANSI_1256")
conv.reset( new DRW_ConvTable(DRW_Table1256, CPLENGTHCOMMON) );
else if (cp == "ANSI_1257")
conv.reset( new DRW_ConvTable(DRW_Table1257, CPLENGTHCOMMON) );
else if (cp == "ANSI_1258")
conv.reset( new DRW_ConvTable(DRW_Table1258, CPLENGTHCOMMON) );
else if (cp == "UTF-8") { //DXF older than 2007 are write in win codepages
cp = "ANSI_1252";
conv.reset( new DRW_Converter(nullptr, 0) );
} else
conv.reset( new DRW_ConvTable(DRW_Table1252, CPLENGTHCOMMON) );
} else {
if (dxfFormat)
conv.reset( new DRW_Converter(nullptr, 0) );//utf16 to utf8
else
conv.reset( new DRW_ConvUTF16() );//utf16 to utf8
}
}
std::string DRW_TextCodec::toUtf8(std::string s) {
return conv->toUtf8(&s);
}
std::string DRW_TextCodec::fromUtf8(std::string s) {
return conv->fromUtf8(&s);
}
std::string DRW_Converter::toUtf8(std::string *s) {
std::string result;
int j = 0;
unsigned int i= 0;
for (i=0; i < s->length(); i++) {
unsigned char c = s->at(i);
if (c < 0x80) { //ascii check for /U+????
if (c == '\\' && i+6 < s->length() && s->at(i+1) == 'U' && s->at(i+2) == '+') {
result += s->substr(j,i-j);
result += encodeText(s->substr(i,7));
i +=6;
j = i+1;
}
} else if (c < 0xE0 ) {//2 bits
i++;
} else if (c < 0xF0 ) {//3 bits
i +=2;
} else if (c < 0xF8 ) {//4 bits
i +=3;
}
}
result += s->substr(j);
return result;
}
std::string DRW_ConvTable::fromUtf8(std::string *s) {
std::string result;
bool notFound;
int code;
int j = 0;
for (unsigned int i=0; i < s->length(); i++) {
unsigned char c = s->at(i);
if (c > 0x7F) { //need to decode
result += s->substr(j,i-j);
std::string part1 = s->substr(i,4);
int l;
code = decodeNum(part1, &l);
j = i+l;
i = j - 1;
notFound = true;
for (int k=0; k<cpLength; k++){
if(table[k] == code) {
result += CPOFFSET + k; //translate from table
notFound = false;
break;
}
}
if (notFound)
result += decodeText(code);
}
}
result += s->substr(j);
return result;
}
std::string DRW_ConvTable::toUtf8(std::string *s) {
std::string res;
std::string::iterator it;
for ( it=s->begin() ; it < s->end(); ++it ) {
unsigned char c = *it;
if (c < 0x80) {
//check for \U+ encoded text
if (c == '\\') {
if (it+6 < s->end() && *(it+1) == 'U' && *(it+2) == '+') {
res += encodeText(std::string(it, it+7));
it +=6;
} else {
res +=c; //no \U+ encoded text write
}
} else
res +=c; //c!='\' ascii char write
} else {//end c < 0x80
res += encodeNum(table[c-0x80]); //translate from table
}
} //end for
return res;
}
std::string DRW_Converter::encodeText(std::string stmp){
int code;
#if defined(__APPLE__)
int Succeeded = sscanf (&( stmp.substr(3,4)[0]), "%x", &code );
if ( !Succeeded || Succeeded == EOF )
code = 0;
#else
std::istringstream sd(stmp.substr(3,4));
sd >> std::hex >> code;
#endif
return encodeNum(code);
}
std::string DRW_Converter::decodeText(int c){
std::string res = "\\U+";
std::string num;
#if defined(__APPLE__)
std::string str(16, '\0');
snprintf (&(str[0]), 16, "%04X", c );
num = str;
#else
std::stringstream ss;
ss << std::uppercase << std::setfill('0') << std::setw(4) << std::hex << c;
ss >> num;
#endif
res += num;
return res;
}
std::string DRW_Converter::encodeNum(int c){
unsigned char ret[5];
if (c < 128) { // 0-7F US-ASCII 7 bits
ret[0] = c;
ret[1] = 0;
} else if (c < 0x800) { //80-07FF 2 bytes
ret[0] = 0xC0 | (c >> 6);
ret[1] = 0x80 | (c & 0x3f);
ret[2] = 0;
} else if (c< 0x10000) { //800-FFFF 3 bytes
ret[0] = 0xe0 | (c >> 12);
ret[1] = 0x80 | ((c >> 6) & 0x3f);
ret[2] = 0x80 | (c & 0x3f);
ret[3] = 0;
} else { //10000-10FFFF 4 bytes
ret[0] = 0xf0 | (c >> 18);
ret[1] = 0x80 | ((c >> 12) & 0x3f);
ret[2] = 0x80 | ((c >> 6) & 0x3f);
ret[3] = 0x80 | (c & 0x3f);
ret[4] = 0;
}
return std::string((char*)ret);
}
/** 's' is a string with at least 4 bytes length
** returned 'b' is byte length of encoded char: 2,3 or 4
**/
int DRW_Converter::decodeNum(std::string s, int *b){
int code= 0;
unsigned char c = s.at(0);
if ( (c& 0xE0) == 0xC0) { //2 bytes
code = ( c&0x1F)<<6;
code = (s.at(1) &0x3F) | code;
*b = 2;
} else if ( (c& 0xF0) == 0xE0) { //3 bytes
code = ( c&0x0F)<<12;
code = ((s.at(1) &0x3F)<<6) | code;
code = (s.at(2) &0x3F) | code;
*b = 3;
} else if ( (c& 0xF8) == 0xF0) { //4 bytes
code = ( c&0x07)<<18;
code = ((s.at(1) &0x3F)<<12) | code;
code = ((s.at(2) &0x3F)<<6) | code;
code = (s.at(3) &0x3F) | code;
*b = 4;
}
return code;
}
std::string DRW_ConvDBCSTable::fromUtf8(std::string *s) {
std::string result;
bool notFound;
int code;
int j = 0;
for (unsigned int i=0; i < s->length(); i++) {
unsigned char c = s->at(i);
if (c > 0x7F) { //need to decode
result += s->substr(j,i-j);
std::string part1 = s->substr(i,4);
int l;
code = decodeNum(part1, &l);
j = i+l;
i = j - 1;
notFound = true;
for (int k=0; k<cpLength; k++){
if(doubleTable[k][1] == code) {
int data = doubleTable[k][0];
char d[3];
d[0] = data >> 8;
d[1] = data & 0xFF;
d[2]= '\0';
result += d; //translate from table
notFound = false;
break;
}
}
if (notFound)
result += decodeText(code);
} //direct conversion
}
result += s->substr(j);
return result;
}
std::string DRW_ConvDBCSTable::toUtf8(std::string *s) {
std::string res;
std::string::iterator it;
for ( it=s->begin() ; it < s->end(); ++it ) {
bool notFound = true;
unsigned char c = *it;
if (c < 0x80) {
notFound = false;
//check for \U+ encoded text
if (c == '\\') {
if (it+6 < s->end() && *(it+1) == 'U' && *(it+2) == '+') {
res += encodeText(std::string(it, it+7));
it +=6;
} else {
res +=c; //no \U+ encoded text write
}
} else
res +=c; //c!='\' ascii char write
} else if(c == 0x80 ){//1 byte table
notFound = false;
res += encodeNum(0x20AC);//euro sign
} else {//2 bytes
++it;
int code = (c << 8) | (unsigned char )(*it);
int sta = leadTable[c-0x81];
int end = leadTable[c-0x80];
for (int k=sta; k<end; k++){
if(doubleTable[k][0] == code) {
res += encodeNum(doubleTable[k][1]); //translate from table
notFound = false;
break;
}
}
}
//not found
if (notFound) res += encodeNum(NOTFOUND936);
} //end for
return res;
}
DRW_Conv932Table::DRW_Conv932Table()
:DRW_Converter(DRW_Table932, CPLENGTH932)
{}
std::string DRW_Conv932Table::fromUtf8(std::string *s) {
std::string result;
bool notFound;
int code;
int j = 0;
for (unsigned int i=0; i < s->length(); i++) {
unsigned char c = s->at(i);
if (c > 0x7F) { //need to decode
result += s->substr(j,i-j);
std::string part1 = s->substr(i,4);
int l;
code = decodeNum(part1, &l);
j = i+l;
i = j - 1;
notFound = true;
// 1 byte table
if (code > 0xff60 && code < 0xFFA0) {
result += code - CPOFFSET932; //translate from table
notFound = false;
}
if (notFound && ( code<0xF8 || (code>0x390 && code<0x542) ||
(code>0x200F && code<0x9FA1) || code>0xF928 )) {
for (int k=0; k<cpLength; k++){
if(DRW_DoubleTable932[k][1] == code) {
int data = DRW_DoubleTable932[k][0];
char d[3];
d[0] = data >> 8;
d[1] = data & 0xFF;
d[2]= '\0';
result += d; //translate from table
notFound = false;
break;
}
}
}
if (notFound)
result += decodeText(code);
} //direct conversion
}
result += s->substr(j);
return result;
}
std::string DRW_Conv932Table::toUtf8(std::string *s) {
std::string res;
std::string::iterator it;
for ( it=s->begin() ; it < s->end(); ++it ) {
bool notFound = true;
unsigned char c = *it;
if (c < 0x80) {
notFound = false;
//check for \U+ encoded text
if (c == '\\') {
if (it+6 < s->end() && *(it+1) == 'U' && *(it+2) == '+') {
res += encodeText(std::string(it, it+7));
it +=6;
} else {
res +=c; //no \U+ encoded text write
}
} else
res +=c; //c!='\' ascii char write
} else if(c > 0xA0 && c < 0xE0 ){//1 byte table
notFound = false;
res += encodeNum(c + CPOFFSET932); //translate from table
} else {//2 bytes
++it;
int code = (c << 8) | (unsigned char )(*it);
int sta;
int end=0;
if (c > 0x80 && c < 0xA0) {
sta = DRW_LeadTable932[c-0x81];
end = DRW_LeadTable932[c-0x80];
} else if (c > 0xDF && c < 0xFD){
sta = DRW_LeadTable932[c-0xC1];
end = DRW_LeadTable932[c-0xC0];
}
if (end > 0) {
for (int k=sta; k<end; k++){
if(DRW_DoubleTable932[k][0] == code) {
res += encodeNum(DRW_DoubleTable932[k][1]); //translate from table
notFound = false;
break;
}
}
}
}
//not found
if (notFound) res += encodeNum(NOTFOUND932);
} //end for
return res;
}
std::string DRW_ConvUTF16::fromUtf8(std::string *s){
DRW_UNUSED(s);
//RLZ: to be writen (only needed for write dwg 2007+)
return std::string();
}
std::string DRW_ConvUTF16::toUtf8(std::string *s){//RLZ: pending to write
std::string res;
std::string::iterator it;
for ( it=s->begin() ; it < s->end(); ++it ) {
unsigned char c1 = *it;
unsigned char c2 = *(++it);
duint16 ch = (c2 <<8) | c1;
res +=encodeNum(ch);
} //end for
return res;
}
std::string DRW_TextCodec::correctCodePage(const std::string& s) {
//stringstream cause crash in OS/X, bug#3597944
std::string cp=s;
transform(cp.begin(), cp.end(), cp.begin(), toupper);
//Latin/Thai
if (cp=="ANSI_874" || cp=="CP874" || cp=="ISO8859-11" || cp=="TIS-620") {
return "ANSI_874";
//Central Europe and Eastern Europe
} else if (cp=="ANSI_1250" || cp=="CP1250" || cp=="ISO8859-2") {
return "ANSI_1250";
//Cyrillic script
} else if (cp=="ANSI_1251" || cp=="CP1251" || cp=="ISO8859-5" || cp=="KOI8-R" ||
cp=="KOI8-U" || cp=="IBM 866") {
return "ANSI_1251";
//Western Europe
} else if (cp=="ANSI_1252" || cp=="CP1252" || cp=="LATIN1" || cp=="ISO-8859-1" ||
cp=="CP819" || cp=="CSISO" || cp=="IBM819" || cp=="ISO_8859-1" || cp=="APPLE ROMAN" ||
cp=="ISO8859-1" || cp=="ISO8859-15" || cp=="ISO-IR-100" || cp=="L1" || cp=="IBM 850") {
return "ANSI_1252";
//Greek
} else if (cp=="ANSI_1253" || cp=="CP1253" || cp=="iso8859-7") {
return "ANSI_1253";
//Turkish
} else if (cp=="ANSI_1254" || cp=="CP1254" || cp=="iso8859-9" || cp=="iso8859-3") {
return "ANSI_1254";
//Hebrew
} else if (cp=="ANSI_1255" || cp=="CP1255" || cp=="iso8859-8") {
return "ANSI_1255";
//Arabic
} else if (cp=="ANSI_1256" || cp=="CP1256" || cp=="ISO8859-6") {
return "ANSI_1256";
//Baltic
} else if (cp=="ANSI_1257" || cp=="CP1257" || cp=="ISO8859-4" || cp=="ISO8859-10" || cp=="ISO8859-13") {
return "ANSI_1257";
//Vietnamese
} else if (cp=="ANSI_1258" || cp=="CP1258") {
return "ANSI_1258";
//Japanese
} else if (cp=="ANSI_932" || cp=="SHIFT-JIS" || cp=="SHIFT_JIS" || cp=="CSSHIFTJIS" ||
cp=="CSWINDOWS31J" || cp=="MS_KANJI" || cp=="X-MS-CP932" || cp=="X-SJIS" ||
cp=="EUCJP" || cp=="EUC-JP" || cp=="CSEUCPKDFMTJAPANESE" || cp=="X-EUC" ||
cp=="X-EUC-JP" || cp=="JIS7") {
return "ANSI_932";
//Chinese PRC GBK (XGB) simplified
} else if (cp=="ANSI_936" || cp=="GBK" || cp=="GB2312" || cp=="CHINESE" || cp=="CN-GB" ||
cp=="CSGB2312" || cp=="CSGB231280" || cp=="CSISO58BG231280" ||
cp=="GB_2312-80" || cp=="GB231280" || cp=="GB2312-80" ||
cp=="ISO-IR-58" || cp=="GB18030") {
return "ANSI_936";
//Korean
} else if (cp=="ANSI_949" || cp=="EUCKR") {
return "ANSI_949";
//Chinese Big5 (Taiwan, Hong Kong SAR)
} else if (cp=="ANSI_950" || cp=="BIG5" || cp=="CN-BIG5" || cp=="CSBIG5" ||
cp=="X-X-BIG5" || cp=="BIG5-HKSCS") {
return "ANSI_950";
//celtic
/* } else if (cp=="ISO8859-14") {
return "ISO8859-14";
} else if (cp=="TSCII") {
return "TSCII"; //tamil
}*/
} else if (cp=="UTF-8" || cp=="UTF8" || cp=="UTF8-BIT") {
return "UTF-8";
} else if (cp=="UTF-16" || cp=="UTF16" || cp=="UTF16-BIT") {
return "UTF-16";
}
return "ANSI_1252";
}
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