435 lines
13 KiB
C++
435 lines
13 KiB
C++
/*============================================================================
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CMake - Cross Platform Makefile Generator
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Copyright 2000-2015 Kitware, Inc., Insight Software Consortium
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Distributed under the OSI-approved BSD License (the "License");
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see accompanying file Copyright.txt for details.
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This software is distributed WITHOUT ANY WARRANTY; without even the
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implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the License for more information.
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============================================================================*/
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#include "cmFortranParser.h"
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#include "cmSystemTools.h"
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#include <assert.h>
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//----------------------------------------------------------------------------
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bool cmFortranParser_s::FindIncludeFile(const char* dir,
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const char* includeName,
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std::string& fileName)
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{
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// If the file is a full path, include it directly.
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if(cmSystemTools::FileIsFullPath(includeName))
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{
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fileName = includeName;
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return cmSystemTools::FileExists(fileName.c_str(), true);
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}
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else
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{
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// Check for the file in the directory containing the including
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// file.
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std::string fullName = dir;
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fullName += "/";
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fullName += includeName;
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if(cmSystemTools::FileExists(fullName.c_str(), true))
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{
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fileName = fullName;
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return true;
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}
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// Search the include path for the file.
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for(std::vector<std::string>::const_iterator i =
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this->IncludePath.begin(); i != this->IncludePath.end(); ++i)
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{
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fullName = *i;
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fullName += "/";
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fullName += includeName;
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if(cmSystemTools::FileExists(fullName.c_str(), true))
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{
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fileName = fullName;
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return true;
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}
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}
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}
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return false;
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}
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//----------------------------------------------------------------------------
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cmFortranParser_s
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::cmFortranParser_s(std::vector<std::string> const& includes,
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std::set<std::string> const& defines,
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cmFortranSourceInfo& info):
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IncludePath(includes), PPDefinitions(defines), Info(info)
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{
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this->InInterface = 0;
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this->InPPFalseBranch = 0;
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// Initialize the lexical scanner.
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cmFortran_yylex_init(&this->Scanner);
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cmFortran_yyset_extra(this, this->Scanner);
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// Create a dummy buffer that is never read but is the fallback
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// buffer when the last file is popped off the stack.
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YY_BUFFER_STATE buffer =
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cmFortran_yy_create_buffer(0, 4, this->Scanner);
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cmFortran_yy_switch_to_buffer(buffer, this->Scanner);
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}
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//----------------------------------------------------------------------------
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cmFortranParser_s::~cmFortranParser_s()
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{
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cmFortran_yylex_destroy(this->Scanner);
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}
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//----------------------------------------------------------------------------
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bool cmFortranParser_FilePush(cmFortranParser* parser,
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const char* fname)
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{
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// Open the new file and push it onto the stack. Save the old
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// buffer with it on the stack.
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if(FILE* file = cmsys::SystemTools::Fopen(fname, "rb"))
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{
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YY_BUFFER_STATE current =
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cmFortranLexer_GetCurrentBuffer(parser->Scanner);
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std::string dir = cmSystemTools::GetParentDirectory(fname);
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cmFortranFile f(file, current, dir);
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YY_BUFFER_STATE buffer =
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cmFortran_yy_create_buffer(0, 16384, parser->Scanner);
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cmFortran_yy_switch_to_buffer(buffer, parser->Scanner);
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parser->FileStack.push(f);
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return 1;
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}
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else
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{
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return 0;
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}
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}
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//----------------------------------------------------------------------------
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bool cmFortranParser_FilePop(cmFortranParser* parser)
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{
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// Pop one file off the stack and close it. Switch the lexer back
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// to the next one on the stack.
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if(parser->FileStack.empty())
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{
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return 0;
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}
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else
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{
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cmFortranFile f = parser->FileStack.top(); parser->FileStack.pop();
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fclose(f.File);
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YY_BUFFER_STATE current =
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cmFortranLexer_GetCurrentBuffer(parser->Scanner);
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cmFortran_yy_delete_buffer(current, parser->Scanner);
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cmFortran_yy_switch_to_buffer(f.Buffer, parser->Scanner);
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return 1;
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}
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}
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//----------------------------------------------------------------------------
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int cmFortranParser_Input(cmFortranParser* parser,
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char* buffer, size_t bufferSize)
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{
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// Read from the file on top of the stack. If the stack is empty,
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// the end of the translation unit has been reached.
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if(!parser->FileStack.empty())
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{
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FILE* file = parser->FileStack.top().File;
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return (int)fread(buffer, 1, bufferSize, file);
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}
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return 0;
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}
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//----------------------------------------------------------------------------
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void cmFortranParser_StringStart(cmFortranParser* parser)
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{
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parser->TokenString = "";
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}
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//----------------------------------------------------------------------------
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const char* cmFortranParser_StringEnd(cmFortranParser* parser)
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{
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return parser->TokenString.c_str();
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}
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//----------------------------------------------------------------------------
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void cmFortranParser_StringAppend(cmFortranParser* parser,
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char c)
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{
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parser->TokenString += c;
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}
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//----------------------------------------------------------------------------
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void cmFortranParser_SetInInterface(cmFortranParser* parser,
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bool in)
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{
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if(parser->InPPFalseBranch)
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{
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return;
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}
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parser->InInterface = in;
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}
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//----------------------------------------------------------------------------
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bool cmFortranParser_GetInInterface(cmFortranParser* parser)
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{
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return parser->InInterface;
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}
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//----------------------------------------------------------------------------
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void cmFortranParser_SetOldStartcond(cmFortranParser* parser,
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int arg)
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{
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parser->OldStartcond = arg;
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}
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//----------------------------------------------------------------------------
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int cmFortranParser_GetOldStartcond(cmFortranParser* parser)
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{
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return parser->OldStartcond;
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}
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//----------------------------------------------------------------------------
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void cmFortranParser_Error(cmFortranParser*, const char*)
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{
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// If there is a parser error just ignore it. The source will not
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// compile and the user will edit it. Then dependencies will have
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// to be regenerated anyway.
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}
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//----------------------------------------------------------------------------
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void cmFortranParser_RuleUse(cmFortranParser* parser,
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const char* name)
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{
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if(!parser->InPPFalseBranch)
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{
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parser->Info.Requires.insert(cmSystemTools::LowerCase(name) );
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}
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}
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//----------------------------------------------------------------------------
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void cmFortranParser_RuleLineDirective(cmFortranParser* parser,
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const char* filename)
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{
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// This is a #line directive naming a file encountered during preprocessing.
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std::string included = filename;
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// Skip #line directives referencing non-files like
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// "<built-in>" or "<command-line>".
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if (included.empty() || included[0] == '<')
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{
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return;
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}
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// Fix windows file path separators since our lexer does not
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// process escape sequences in string literals.
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cmSystemTools::ReplaceString(included, "\\\\", "\\");
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cmSystemTools::ConvertToUnixSlashes(included);
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// Save the named file as included in the source.
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if (cmSystemTools::FileExists(included, true))
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{
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parser->Info.Includes.insert(included);
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}
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}
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//----------------------------------------------------------------------------
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void cmFortranParser_RuleInclude(cmFortranParser* parser,
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const char* name)
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{
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if(parser->InPPFalseBranch)
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{
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return;
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}
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// If processing an include statement there must be an open file.
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assert(!parser->FileStack.empty());
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// Get the directory containing the source in which the include
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// statement appears. This is always the first search location for
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// Fortran include files.
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std::string dir = parser->FileStack.top().Directory;
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// Find the included file. If it cannot be found just ignore the
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// problem because either the source will not compile or the user
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// does not care about depending on this included source.
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std::string fullName;
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if(parser->FindIncludeFile(dir.c_str(), name, fullName))
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{
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// Found the included file. Save it in the set of included files.
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parser->Info.Includes.insert(fullName);
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// Parse it immediately to translate the source inline.
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cmFortranParser_FilePush(parser, fullName.c_str());
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}
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}
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//----------------------------------------------------------------------------
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void cmFortranParser_RuleModule(cmFortranParser* parser,
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const char* name)
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{
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if(!parser->InPPFalseBranch && !parser->InInterface)
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{
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parser->Info.Provides.insert(cmSystemTools::LowerCase(name));
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}
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}
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//----------------------------------------------------------------------------
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void cmFortranParser_RuleDefine(cmFortranParser* parser,
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const char* macro)
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{
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if(!parser->InPPFalseBranch)
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{
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parser->PPDefinitions.insert(macro);
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}
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}
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//----------------------------------------------------------------------------
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void cmFortranParser_RuleUndef(cmFortranParser* parser,
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const char* macro)
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{
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if(!parser->InPPFalseBranch)
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{
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std::set<std::string>::iterator match;
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match = parser->PPDefinitions.find(macro);
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if(match != parser->PPDefinitions.end())
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{
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parser->PPDefinitions.erase(match);
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}
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}
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}
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//----------------------------------------------------------------------------
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void cmFortranParser_RuleIfdef(cmFortranParser* parser,
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const char* macro)
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{
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// A new PP branch has been opened
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parser->SkipToEnd.push(false);
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if (parser->InPPFalseBranch)
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{
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parser->InPPFalseBranch++;
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}
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else if(parser->PPDefinitions.find(macro) == parser->PPDefinitions.end())
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{
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parser->InPPFalseBranch=1;
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}
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else
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{
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parser->SkipToEnd.top() = true;
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}
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}
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//----------------------------------------------------------------------------
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void cmFortranParser_RuleIfndef(cmFortranParser* parser,
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const char* macro)
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{
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// A new PP branch has been opened
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parser->SkipToEnd.push(false);
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if (parser->InPPFalseBranch)
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{
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parser->InPPFalseBranch++;
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}
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else if(parser->PPDefinitions.find(macro) != parser->PPDefinitions.end())
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{
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parser->InPPFalseBranch = 1;
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}
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else
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{
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// ignore other branches
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parser->SkipToEnd.top() = true;
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}
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}
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//----------------------------------------------------------------------------
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void cmFortranParser_RuleIf(cmFortranParser* parser)
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{
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/* Note: The current parser is _not_ able to get statements like
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* #if 0
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* #if 1
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* #if MYSMBOL
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* #if defined(MYSYMBOL)
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* #if defined(MYSYMBOL) && ...
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* right. The same for #elif. Thus in
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* #if SYMBOL_1
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* ..
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* #elif SYMBOL_2
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* ...
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* ...
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* #elif SYMBOL_N
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* ..
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* #else
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* ..
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* #endif
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* _all_ N+1 branches are considered. If you got something like this
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* #if defined(MYSYMBOL)
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* #if !defined(MYSYMBOL)
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* use
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* #ifdef MYSYMBOL
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* #ifndef MYSYMBOL
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* instead.
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*/
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// A new PP branch has been opened
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// Never skip! See note above.
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parser->SkipToEnd.push(false);
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}
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//----------------------------------------------------------------------------
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void cmFortranParser_RuleElif(cmFortranParser* parser)
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{
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/* Note: There are parser limitations. See the note at
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* cmFortranParser_RuleIf(..)
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*/
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// Always taken unless an #ifdef or #ifndef-branch has been taken
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// already. If the second condition isn't meet already
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// (parser->InPPFalseBranch == 0) correct it.
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if(!parser->SkipToEnd.empty() &&
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parser->SkipToEnd.top() && !parser->InPPFalseBranch)
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{
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parser->InPPFalseBranch = 1;
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}
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}
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//----------------------------------------------------------------------------
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void cmFortranParser_RuleElse(cmFortranParser* parser)
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{
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// if the parent branch is false do nothing!
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if(parser->InPPFalseBranch > 1)
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{
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return;
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}
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// parser->InPPFalseBranch is either 0 or 1. We change it depending on
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// parser->SkipToEnd.top()
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if(!parser->SkipToEnd.empty() &&
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parser->SkipToEnd.top())
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{
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parser->InPPFalseBranch = 1;
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}
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else
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{
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parser->InPPFalseBranch = 0;
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}
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}
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//----------------------------------------------------------------------------
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void cmFortranParser_RuleEndif(cmFortranParser* parser)
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{
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if(!parser->SkipToEnd.empty())
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{
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parser->SkipToEnd.pop();
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}
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// #endif doesn't know if there was a "#else" in before, so it
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// always decreases InPPFalseBranch
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if(parser->InPPFalseBranch)
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{
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parser->InPPFalseBranch--;
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}
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}
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