382 lines
10 KiB
C++
382 lines
10 KiB
C++
/*
|
|
* c++check - c/c++ syntax checking
|
|
* Copyright (C) 2007 Daniel Marjamäki
|
|
*
|
|
* 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 3 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, see <http://www.gnu.org/licenses/
|
|
*/
|
|
|
|
|
|
#include "preprocessor.h"
|
|
|
|
#include <algorithm>
|
|
|
|
#include <sstream>
|
|
|
|
#ifdef __BORLANDC__
|
|
#include <ctype>
|
|
#endif
|
|
|
|
|
|
Preprocessor::Preprocessor( ErrorLogger *errorLogger )
|
|
{
|
|
_errorLogger = errorLogger;
|
|
}
|
|
|
|
/** Just read the code into a string. Perform simple cleanup of the code */
|
|
std::string Preprocessor::read(std::istream &istr, const std::string &filename)
|
|
{
|
|
// Get filedata from stream..
|
|
bool ignoreSpace = true;
|
|
|
|
// For the error report
|
|
int lineno = 1;
|
|
|
|
std::ostringstream code;
|
|
for (char ch = (char)istr.get(); istr.good(); ch = (char)istr.get())
|
|
{
|
|
if ( ch < 0 )
|
|
{
|
|
// Bad content..
|
|
std::ostringstream oss;
|
|
oss << "[" << filename << ":" << lineno << "] Bad character found: " << int((unsigned char)ch) << std::endl;
|
|
_errorLogger->reportErr( oss.str() );
|
|
return "";
|
|
}
|
|
|
|
if ( ch == '\n' )
|
|
++lineno;
|
|
|
|
// Replace assorted special chars with spaces..
|
|
if ( (ch != '\n') && (isspace(ch) || iscntrl(ch)) )
|
|
ch = ' ';
|
|
|
|
// Skip spaces after ' ' and after '#'
|
|
if ( ch == ' ' && ignoreSpace )
|
|
continue;
|
|
ignoreSpace = bool(ch == ' ' || ch == '#' || ch == '/');
|
|
|
|
// Remove comments..
|
|
if ( ch == '/' )
|
|
{
|
|
char chNext = (char)istr.get();
|
|
|
|
if ( chNext == '/' )
|
|
{
|
|
while (istr.good() && ch!='\n')
|
|
ch = (char)istr.get();
|
|
code << "\n";
|
|
++lineno;
|
|
}
|
|
|
|
else if ( chNext == '*' )
|
|
{
|
|
char chPrev = 0;
|
|
while (istr.good() && (chPrev!='*' || ch!='/'))
|
|
{
|
|
chPrev = ch;
|
|
ch = (char)istr.get();
|
|
if (ch == '\n')
|
|
{
|
|
code << "\n";
|
|
++lineno;
|
|
}
|
|
}
|
|
}
|
|
|
|
else
|
|
{
|
|
if ( chNext == '\n' )
|
|
++lineno;
|
|
code << std::string(1,ch) << std::string(1,chNext);
|
|
}
|
|
}
|
|
|
|
// String constants..
|
|
else if ( ch == '\"' )
|
|
{
|
|
code << "\"";
|
|
do
|
|
{
|
|
ch = (char)istr.get();
|
|
code << std::string(1,ch);
|
|
if ( ch == '\\' )
|
|
{
|
|
ch = (char)istr.get();
|
|
code << std::string(1,ch);
|
|
|
|
// Avoid exiting loop if string contains "-characters
|
|
ch = 0;
|
|
}
|
|
} while ( istr.good() && ch != '\"' );
|
|
}
|
|
|
|
// char constants..
|
|
else if ( ch == '\'' )
|
|
{
|
|
code << "\'";
|
|
ch = (char)istr.get();
|
|
code << std::string(1,ch);
|
|
if ( ch == '\\' )
|
|
{
|
|
ch = (char)istr.get();
|
|
code << std::string(1,ch);
|
|
}
|
|
ch = (char)istr.get();
|
|
code << "\'";
|
|
}
|
|
|
|
// Just some code..
|
|
else
|
|
{
|
|
code << std::string(1, ch);
|
|
}
|
|
}
|
|
|
|
return code.str();
|
|
}
|
|
|
|
/**
|
|
* Extract the code for each configuration
|
|
* \param istr The (file/string) stream to read from.
|
|
* \param result The map that will get the results
|
|
*/
|
|
void Preprocessor::preprocess(std::istream &istr, std::map<std::string, std::string> &result, const std::string &filename)
|
|
{
|
|
std::string codestr( read(istr, filename) );
|
|
|
|
// Replace all tabs with spaces..
|
|
std::string::size_type loc = 0;
|
|
while ( (loc = codestr.find("\t", loc)) != std::string::npos )
|
|
codestr[loc] = ' ';
|
|
|
|
// Remove all indentation..
|
|
if ( !codestr.empty() && codestr[0] == ' ' )
|
|
codestr.erase( 0, codestr.find_first_not_of(" ") );
|
|
loc = 0;
|
|
while ( (loc = codestr.find("\n ", loc)) != std::string::npos )
|
|
codestr.erase( 1 + loc, 1 );
|
|
|
|
// Remove all trailing spaces..
|
|
loc = 0;
|
|
while ( (loc = codestr.find(" \n", loc)) != std::string::npos )
|
|
{
|
|
codestr.erase( loc, 1 );
|
|
if ( loc > 0 )
|
|
--loc;
|
|
}
|
|
|
|
// Using the backslash at the end of a line..
|
|
while ( (loc = codestr.rfind("\\\n")) != std::string::npos )
|
|
{
|
|
codestr.erase(loc, 2);
|
|
if (loc > 0 && codestr[loc-1] != ' ')
|
|
codestr.insert(loc, " ");
|
|
if ( (loc = codestr.find("\n", loc)) != std::string::npos)
|
|
codestr.insert( loc, "\n" );
|
|
}
|
|
|
|
// Get all possible configurations..
|
|
std::list<std::string> cfgs = getcfgs( codestr );
|
|
|
|
// Extract the code for each possible configuration..
|
|
result.clear();
|
|
for ( std::list<std::string>::const_iterator it = cfgs.begin(); it != cfgs.end(); ++it )
|
|
{
|
|
result[ *it ] = getcode( codestr, *it );
|
|
}
|
|
}
|
|
|
|
|
|
|
|
// Get the DEF in this line: "#ifdef DEF"
|
|
std::string Preprocessor::getdef(std::string line, bool def)
|
|
{
|
|
// If def is true, the line must start with "#ifdef"
|
|
if ( def && line.find("#ifdef ") != 0 && line.find("#if ") != 0 && line.find("#elif ") != 0 )
|
|
{
|
|
return "";
|
|
}
|
|
|
|
// If def is false, the line must start with "#ifndef"
|
|
if ( !def && line.find("#ifndef ") != 0 )
|
|
{
|
|
return "";
|
|
}
|
|
|
|
// Remove the "#ifdef" or "#ifndef"
|
|
line.erase( 0, line.find(" ") );
|
|
|
|
// Remove all spaces.
|
|
while ( line.find(" ") != std::string::npos )
|
|
line.erase( line.find(" "), 1 );
|
|
|
|
// The remaining string is our result.
|
|
return line;
|
|
}
|
|
|
|
|
|
|
|
std::list<std::string> Preprocessor::getcfgs( const std::string &filedata )
|
|
{
|
|
std::list<std::string> ret;
|
|
ret.push_back("");
|
|
|
|
std::list<std::string> deflist;
|
|
|
|
std::istringstream istr(filedata);
|
|
std::string line;
|
|
while ( getline(istr, line) )
|
|
{
|
|
std::string def = getdef(line, true) + getdef(line, false);
|
|
if (!def.empty())
|
|
{
|
|
if ( ! deflist.empty() && line.find("#elif ") == 0 )
|
|
deflist.pop_back();
|
|
deflist.push_back(def);
|
|
def = "";
|
|
for ( std::list<std::string>::const_iterator it = deflist.begin(); it != deflist.end(); ++it)
|
|
{
|
|
if ( *it == "0" )
|
|
break;
|
|
if ( *it == "1" )
|
|
continue;
|
|
if ( ! def.empty() )
|
|
def += ";";
|
|
def += *it;
|
|
}
|
|
|
|
if (std::find(ret.begin(), ret.end(), def) == ret.end())
|
|
ret.push_back( def );
|
|
}
|
|
|
|
if ( line.find("#else") == 0 && ! deflist.empty() )
|
|
{
|
|
std::string def( ( deflist.back() == "1" ) ? "0" : "1" );
|
|
deflist.pop_back();
|
|
deflist.push_back( def );
|
|
}
|
|
|
|
if ( line.find("#endif") == 0 && ! deflist.empty() )
|
|
deflist.pop_back();
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
|
|
bool Preprocessor::match_cfg_def( std::string cfg, const std::string &def )
|
|
{
|
|
if ( def == "0" )
|
|
return false;
|
|
|
|
if ( def == "1" )
|
|
return true;
|
|
|
|
if ( cfg.empty() )
|
|
return false;
|
|
|
|
while ( ! cfg.empty() )
|
|
{
|
|
if ( cfg.find(";") == std::string::npos )
|
|
return bool(cfg == def);
|
|
std::string _cfg = cfg.substr( 0, cfg.find(";") );
|
|
if ( _cfg == def )
|
|
return true;
|
|
cfg.erase( 0, cfg.find(";") + 1 );
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
|
|
std::string Preprocessor::getcode(const std::string &filedata, std::string cfg)
|
|
{
|
|
std::ostringstream ret;
|
|
|
|
bool match = true;
|
|
std::list<bool> matching_ifdef;
|
|
std::list<bool> matched_ifdef;
|
|
|
|
std::istringstream istr(filedata);
|
|
std::string line;
|
|
while ( getline(istr, line) )
|
|
{
|
|
std::string def = getdef( line, true );
|
|
std::string ndef = getdef( line, false );
|
|
|
|
if ( line.find("#elif ") == 0 )
|
|
{
|
|
if ( matched_ifdef.back() )
|
|
{
|
|
matching_ifdef.back() = false;
|
|
}
|
|
else
|
|
{
|
|
if ( match_cfg_def(cfg, def) )
|
|
{
|
|
matching_ifdef.back() = true;
|
|
matched_ifdef.back() = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
else if ( ! def.empty() )
|
|
{
|
|
matching_ifdef.push_back( match_cfg_def(cfg, def) );
|
|
matched_ifdef.push_back( matching_ifdef.back() );
|
|
}
|
|
|
|
else if ( ! ndef.empty() )
|
|
{
|
|
matching_ifdef.push_back( ! match_cfg_def(cfg, ndef) );
|
|
matched_ifdef.push_back( matching_ifdef.back() );
|
|
}
|
|
|
|
else if ( line == "#else" )
|
|
{
|
|
if ( ! matched_ifdef.empty() )
|
|
matching_ifdef.back() = ! matched_ifdef.back();
|
|
}
|
|
|
|
else if ( line == "#endif" )
|
|
{
|
|
if ( ! matched_ifdef.empty() )
|
|
matched_ifdef.pop_back();
|
|
if ( ! matching_ifdef.empty() )
|
|
matching_ifdef.pop_back();
|
|
}
|
|
|
|
if ( !line.empty() && line[0] == '#' )
|
|
{
|
|
match = true;
|
|
for ( std::list<bool>::const_iterator it = matching_ifdef.begin(); it != matching_ifdef.end(); ++it )
|
|
match &= bool(*it);
|
|
}
|
|
if ( ! match )
|
|
line = "";
|
|
|
|
if ( line.find("#if") == 0 ||
|
|
line.find("#else") == 0 ||
|
|
line.find("#elif") == 0 ||
|
|
line.find("#endif") == 0 )
|
|
line = "";
|
|
|
|
ret << line << "\n";
|
|
}
|
|
|
|
return ret.str();
|
|
}
|
|
|