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// This file is part of PUMA.
// Copyright (C) 1999-2003 The PUMA developer team.
//
// 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., 59 Temple Place, Suite 330, Boston,
// MA 02111-1307 USA
#include "Puma/Unit.h"
#include "Puma/Token.h"
#include "Puma/SysCall.h"
#include "Puma/PreMacro.h"
#include "Puma/PreTree.h"
#include "Puma/TokenStream.h"
#include "Puma/ErrorStream.h"
#include "Puma/PreParserState.h"
#include "Puma/PreMacroManager.h"
#include "Puma/CCommentTokens.h"
#include <time.h>
#include <stdio.h>
#include <string.h>
namespace Puma {
PreParserState::PreParserState () :
_Line("__LINE__"), _File("__FILE__"),
_Date("__DATE__"), _Time("__TIME__"),
_IncLevel("__INCLUDE_LEVEL__"),
_Defined("defined"), _Defined1("defined("),
_LastDay(-1), _LastUnit(0)
{
errors = number = stackPos = 0;
noFILE = noLINE = noDATE = false;
noTIME = noINCLUDE_LEVEL = false;
syntaxError = errorDirective = false;
syntaxTree = (PreTree*) 0;
sl_token = (Token*) 0;
lastToken = currToken = (Token*) 0;
lastType = currType = Token::ID_UNKNOWN;
passOnToken = true;
forcedIncludes = false;
newline = new Token (TOK_WSPACE, "\n");
}
// Check whether the macro name is valid.
bool PreParserState::checkMacroName (PreMacro* macro)
{
// If some predefined macros get redefined it has to be remembered.
if ( macro->getName () == _IncLevel ) {
noINCLUDE_LEVEL = true;
} else if ( macro->getName () == _Line ) {
noLINE = true;
} else if ( macro->getName () == _Date ) {
noDATE = true;
} else if ( macro->getName () == _File ) {
noFILE = true;
} else if ( macro->getName () == _Time ) {
noTIME = true;
// The special name `defined' can't be used for a macro.
} else if (macro->getName () == _Defined ||
macro->getName () == _Defined1) {
*err << macro->location () << sev_error
<< "`defined' is not a valid macro name"
<< endMessage;
delete macro;
return false;
}
return true;
}
// Check whether macro is one of the special predefined macros.
PreMacro* PreParserState::checkPredefined (PreMacro* macro, TokenStream* scanner,
PreMacroManager& manager) /*const*/
{
// Because these macros aren't really predefined, they have to be
// prepared => that means to compute their bodies.
// Integer constant representing the depth of nesting in include files.
if (macro == manager.getIncLevelMacro() && ! noINCLUDE_LEVEL) {
char value[12];
sprintf (value, "%li", (number ? number - 2 : scanner->length ()-1));
macro->setBody(value);
}
// String constant representing the current input file.
else if (macro == manager.getFileMacro() && ! noLINE) {
if (! number) {
Unit* unit = scanner->lookup (scanner->length ()-1)->unit ();
if (unit != _LastUnit) {
char* buffer = unit->name ();
char* value = new char[strlen (buffer) + 3];
sprintf (value, "\"%s\"", buffer);
macro->setBody(value);
delete [] value;
}
}
}
// Integer constant representing the current input line number.
else if (macro == manager.getLineMacro() && ! noLINE) {
char value[12];
sprintf (value, "%i", currToken->location ().line ());
macro->setBody(value);
}
// String constant representing the current date of the form
// "Apr 1 1999".
else if (macro == manager.getDateMacro() && ! noDATE) {
time_t curtime = SysCall::time (NULL, err);
tm* loctime = localtime (&curtime);
if (_LastDay != loctime->tm_mday) {
char buffer[16];
char value[16];
_LastDay = loctime->tm_mday;
strftime (buffer, 12, "%b %d %Y", loctime);
sprintf (value, "\"%s\"", buffer);
macro->setBody(value);
}
}
// String constant representing the current time of the form
// "12:30:45".
else if (macro == manager.getTimeMacro() && ! noTIME) {
char buffer[16];
char value[16];
time_t curtime = SysCall::time (NULL, err);
tm* loctime = localtime (&curtime);
strftime (buffer, 9, "%H:%M:%S", loctime);
sprintf (value, "\"%s\"", buffer);
macro->setBody(value);
}
return macro;
}
// Check whether macro is a "self-referential" macro.
bool PreParserState::checkToExpand (Token *token, PreMacro* macro,
TokenStream* scanner,
Array<PreMacro*>& macroStack,
set<Token*> &prescanned)
{
// A special feature of ANSI Standard C is that the self-reference
// is not considered a macro call, it is passed into the preprocessor
// output unchanged.
if (number) {
stackPos = scanner->length () - number;
// Search macro on stack. If found it is a self-referential macro.
for (int i = 0; i <= stackPos; i++)
if (strcmp (macro->getName (), macroStack[i]->getName ()) == 0)
return false;
}
// Macros names found in prescaned macro arguments can only be self-
// referential macros. They shall not be expanded again
if (prescanned.find (token) != prescanned.end ()) {
return false;
}
return true;
}
} // namespace Puma
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