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// gencharset.cpp
// Revision 31-jul-2004
#include <iostream>
#include <fstream>
#include <string>
#include <stdexcept>
#include <sstream>
// bitset in gcc 2.95 uses min whithout defining it.
// Then we include something that does.
#include <algorithm>
#include <bitset>
using std::istream;
using std::ostream;
using std::cerr;
using std::endl;
using std::string;
using std::runtime_error;
void gencharset (const string & fin, const string & fout,
const std::string & name);
void readcharset (istream & in);
void writecharset (ostream & out, const std::string & name);
size_t linenumber= 0;
int main (int argc, char * * argv)
{
try
{
string fin, fout, name;
if (argc > 1) fin= argv [1];
if (argc > 2) fout= argv [2];
if (argc > 3) name= argv [3];
gencharset (fin, fout, name);
}
catch (std::exception & e)
{
cerr << e.what ();
if (linenumber != 0)
cerr << " in line " << linenumber;
cerr << endl;
}
}
typedef unsigned char chardata [8];
chardata default_data;
bool default_defined= false;
chardata data [256];
bool data_defined [256]= { false };
void gencharset (const string & fin, const string & fout,
const std::string & name)
{
istream * pin;
if (fin.empty () )
pin= & std::cin;
else
{
std::ifstream * pinf= new std::ifstream (fin.c_str () );
if (! pinf->is_open () )
throw runtime_error ("File not found");
pin= pinf;
}
readcharset (* pin);
if (! fin.empty () )
delete pin;
linenumber= 0;
ostream * pout;
if (fout.empty () )
pout= & std::cout;
else
{
std::ofstream * poutf= new std::ofstream (fout.c_str () );
if (! poutf->is_open () )
throw runtime_error ("Cannot create output file");
pout= poutf;
}
writecharset (* pout, name);
if (! fout.empty () )
delete pout;
}
bool readline (istream & in, string & str)
{
do {
std::getline (in, str);
if (! in)
return false;
++ linenumber;
string::size_type l= str.size ();
if (l > 0 && str [l - 1] == '\r')
str= str.substr (0, l - 1);
} while (str.empty () || str [0] == '#');
return true;
}
void readchar (istream & in, chardata & chd)
{
string str;
bool invert= false;
for (int i= 0; i < 8; ++i)
{
if (! readline (in, str) )
throw runtime_error ("Unexpected eof");
if (str == "INVERT")
{
invert= true;
if (! readline (in, str) )
throw runtime_error ("Unexpected eof");
}
std::bitset <8> b (str);
unsigned long l= b.to_ulong ();
if (invert)
l= ~ l;
chd [i]= static_cast <unsigned char> (l);
}
}
unsigned char getcharcode (const string & str)
{
if (str.size () == 1)
return str [0];
std::istringstream iss (str);
unsigned int u;
iss >> u;
if (! iss)
throw runtime_error ("Syntax error");
char c;
iss >> c;
if (! iss.eof () )
throw runtime_error ("Syntax error");
if (u > 255)
throw runtime_error ("Invalid char number");
return static_cast <unsigned char> (u);
}
void readcharset (istream & in)
{
string str;
while (readline (in, str) )
{
//cerr << str << endl;
if (str == "DEFAULT")
{
if (default_defined)
throw runtime_error
("Default already defined");
//cerr << "Defining default" << endl;
readchar (in, default_data);
default_defined= true;
}
else
{
unsigned char ch= getcharcode (str);
//cerr << "Defining char: ";
//if (ch >= 32) cerr << ch;
//else cerr << static_cast <unsigned int> (ch);
//cerr << endl;
if (data_defined [ch] )
throw runtime_error ("Char already defined");
readchar (in, data [ch] );
data_defined [ch]= true;
}
}
}
void writecharset (ostream & out, const std::string & name)
{
if (name.empty () )
out <<
"// charset.cpp\n";
else
out <<
"// charset_" << name << ".cpp\n";
out <<
"// Automatically generated, do not edit.\n"
"\n"
"#include \"charset.h\"\n"
"\n"
"const charset::chardataset charset::";
if (name.empty () )
out << "default";
else
out << name;
out << "_data= {\n"
;
for (int i= 0; i < 256; ++i)
{
out << "\t// char " << i << "\n\t{ ";
chardata * pdata;
if (data_defined [i] ) pdata= & data [i];
else pdata= & default_data;
for (int j= 0; j < 8; ++j)
{
out << static_cast <unsigned int> ( (* pdata) [j] );
if (j < 7) out << ", ";
}
out << " },\n";
}
out <<
"};\n"
"\n"
"//End of charset.cpp\n"
;
}
// End of gencharset.cpp
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