CMake/Source/cmDependsFortran.cxx

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/*=========================================================================
Program: CMake - Cross-Platform Makefile Generator
Module: $RCSfile$
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) 2002 Kitware, Inc., Insight Consortium. All rights reserved.
See Copyright.txt or http://www.cmake.org/HTML/Copyright.html for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#include "cmDependsFortran.h"
#include "cmSystemTools.h"
#include "cmDependsFortranParser.h" /* Interface to parser object. */
#include <assert.h>
#include <stack>
// TODO: Test compiler for the case of the mod file. Some always
// use lower case and some always use upper case. I do not know if any
// use the case from the source code.
//----------------------------------------------------------------------------
// Parser methods not included in generated interface.
// Get the current buffer processed by the lexer.
YY_BUFFER_STATE cmDependsFortranLexer_GetCurrentBuffer(yyscan_t yyscanner);
// The parser entry point.
int cmDependsFortran_yyparse(yyscan_t);
//----------------------------------------------------------------------------
// Define parser object internal structure.
struct cmDependsFortranFile
{
cmDependsFortranFile(FILE* file, YY_BUFFER_STATE buffer,
const std::string& dir):
File(file), Buffer(buffer), Directory(dir) {}
FILE* File;
YY_BUFFER_STATE Buffer;
std::string Directory;
};
struct cmDependsFortranParser_s
{
cmDependsFortranParser_s(cmDependsFortran* self);
~cmDependsFortranParser_s();
// Pointer back to the main class.
cmDependsFortran* Self;
// Lexical scanner instance.
yyscan_t Scanner;
// Stack of open files in the translation unit.
std::stack<cmDependsFortranFile> FileStack;
// Buffer for string literals.
std::string TokenString;
// Flag for whether lexer is reading from inside an interface.
int InInterface;
// Set of provided and required modules.
std::set<cmStdString> Provides;
std::set<cmStdString> Requires;
// Set of files included in the translation unit.
std::set<cmStdString> Includes;
};
//----------------------------------------------------------------------------
cmDependsFortran::cmDependsFortran():
m_IncludePath(0)
{
}
//----------------------------------------------------------------------------
cmDependsFortran::cmDependsFortran(std::vector<std::string> const& includes):
m_IncludePath(&includes)
{
}
//----------------------------------------------------------------------------
cmDependsFortran::~cmDependsFortran()
{
}
//----------------------------------------------------------------------------
bool cmDependsFortran::WriteDependencies(const char *src,
const char *obj, std::ostream& os)
{
// Make sure this is a scanning instance.
if(!src || src[0] == '\0')
{
cmSystemTools::Error("Cannot scan dependencies without an source file.");
return false;
}
if(!obj || obj[0] == '\0')
{
cmSystemTools::Error("Cannot scan dependencies without an object file.");
return false;
}
if(!m_IncludePath)
{
cmSystemTools::Error("Cannot scan dependencies without an include path.");
return false;
}
// Create the parser object.
cmDependsFortranParser parser(this);
// Push on the starting file.
cmDependsFortranParser_FilePush(&parser, src);
// Parse the translation unit.
if(cmDependsFortran_yyparse(parser.Scanner) != 0)
{
// Failed to parse the file. Report failure to write dependencies.
return false;
}
// Write the include dependencies to the output stream.
for(std::set<cmStdString>::const_iterator i = parser.Includes.begin();
i != parser.Includes.end(); ++i)
{
os << obj << ": "
<< cmSystemTools::ConvertToOutputPath(i->c_str()).c_str()
<< std::endl;
}
os << std::endl;
// Write module requirements to the output stream.
for(std::set<cmStdString>::const_iterator i = parser.Requires.begin();
i != parser.Requires.end(); ++i)
{
// Require only modules not provided in the same source.
if(parser.Provides.find(*i) == parser.Provides.end())
{
// since we require some things add them to our list of requirements
os << obj << ".requires: " << i->c_str() << ".mod.proxy"
<< std::endl;
}
}
// Write provided modules to the output stream.
for(std::set<cmStdString>::const_iterator i = parser.Provides.begin();
i != parser.Provides.end(); ++i)
{
os << i->c_str() << ".mod.proxy: " << obj
<< ".provides" << std::endl;
}
// If any modules are provided then they must be converted to stamp files.
if(!parser.Provides.empty())
{
os << obj << ".provides.build:\n";
for(std::set<cmStdString>::const_iterator i = parser.Provides.begin();
i != parser.Provides.end(); ++i)
{
// Always use lower case for the mod stamp file name. The
// cmake_copy_f90_mod will call back to this class, which will
// try various cases for the real mod file name.
std::string m = cmSystemTools::LowerCase(*i);
os << "\t$(CMAKE_COMMAND) -E cmake_copy_f90_mod "
<< i->c_str() << " " << m.c_str() << ".mod.stamp\n";
}
os << "\t@touch " << obj << ".provides.build\n";
}
/*
// TODO:
What about .mod files provided in another directory and found with a
-M search path? The stamp file will not be updated, so things might
not rebuild. Possible solutions (not all thought through):
Solution 1: Have all the .o.requires in a directory depend on a
single .outside.requires that searches for .mod files in another
directory of the build tree and uses copy-if-different to produce
the local directory's stamp files. (won't work because the single
rule cannot know about the modules)
Solution 2: When the dependency is detected search the module
include path for a mark file indicating the module is provided. If
not found just write the dummy stamp file. If found, we need a rule
to copy-if-different the module file. When a module is provided,
write this mark file.
Solution 3: Use a set of make rules like this:
# When required:
foo.mod.proxy: foo.mod.default
foo.mod.default:: foo.mod.hack
@echo foo.mod.default2 # Search for and copy-if-different the mod file.
foo.mod.hack:
# When provided:
foo.mod.proxy: foo.o.requires
@rm -f foo.mod.hack foo.mod.default
foo.o.requires: foo.mod.hack
@echo foo.o.requires
foo.mod.hack:
@touch foo.mod.hack
@touch foo.mod.default
Solution 4:
When scanning dependencies and providing a module:
- Create a .mod.provided.
- Add .mod.proxy rule depending on corresponding .o.requires.
When scanning dependencies and requiring a module:
- Search the module path for a .mod.provided or a .mod.
- If a .mod.provided is found depend on the corresponding .mod.stamp
(it is provided by CMake in another directory)
- Else, if a .mod is found depend on it directly
(it is provided in another directory by a non-CMake project)
- Else:
- Add the empty proxy rule (if it is provided locally this will hook it)
- Depend on a local .mod.stamp (it might be provided locally)
- Create the dummy local .mod.stamp (it might not be provided locally)
*/
return true;
}
//----------------------------------------------------------------------------
bool cmDependsFortran::CheckDependencies(std::istream&)
{
// TODO: Parse and check dependencies.
return true;
}
//----------------------------------------------------------------------------
bool cmDependsFortran::CopyModule(const std::vector<std::string>& args)
{
// Implements
//
// $(CMAKE_COMMAND) -E cmake_copy_f90_mod input.mod output.mod.stamp
//
// Note that the case of the .mod file depends on the compiler. In
// the future this copy could also account for the fact that some
// compilers include a timestamp in the .mod file so it changes even
// when the interface described in the module does not.
std::string mod = args[2];
std::string stamp = args[3];
std::string mod_upper = cmSystemTools::UpperCase(mod.c_str());
std::string mod_lower = cmSystemTools::LowerCase(mod.c_str());
mod += ".mod";
mod_upper += ".mod";
mod_lower += ".mod";
if(cmSystemTools::FileExists(mod_upper.c_str()))
{
if(!cmSystemTools::CopyFileIfDifferent(mod_upper.c_str(), stamp.c_str()))
{
std::cerr << "Error copying Fortran module from \""
<< mod_upper.c_str() << "\" to \"" << stamp.c_str()
<< "\".\n";
return false;
}
return true;
}
else if(cmSystemTools::FileExists(mod_lower.c_str()))
{
if(!cmSystemTools::CopyFileIfDifferent(mod_lower.c_str(), stamp.c_str()))
{
std::cerr << "Error copying Fortran module from \""
<< mod_lower.c_str() << "\" to \"" << stamp.c_str()
<< "\".\n";
return false;
}
return true;
}
std::cerr << "Error copying Fortran module \"" << args[2].c_str()
<< "\". Tried \"" << mod_upper.c_str()
<< "\" and \"" << mod_lower.c_str() << "\".\n";
return false;
}
//----------------------------------------------------------------------------
bool cmDependsFortran::FindIncludeFile(const char* dir,
const char* includeName,
std::string& fileName)
{
// If the file is a full path, include it directly.
if(cmSystemTools::FileIsFullPath(includeName))
{
fileName = includeName;
return cmSystemTools::FileExists(fileName.c_str());
}
else
{
// Check for the file in the directory containing the including
// file.
std::string fullName = dir;
fullName += "/";
fullName += includeName;
if(cmSystemTools::FileExists(fullName.c_str()))
{
fileName = fullName;
return true;
}
// Search the include path for the file.
for(std::vector<std::string>::const_iterator i = m_IncludePath->begin();
i != m_IncludePath->end(); ++i)
{
fullName = *i;
fullName += "/";
fullName += includeName;
if(cmSystemTools::FileExists(fullName.c_str()))
{
fileName = fullName;
return true;
}
}
}
return false;
}
//----------------------------------------------------------------------------
cmDependsFortranParser_s::cmDependsFortranParser_s(cmDependsFortran* self):
Self(self)
{
this->InInterface = 0;
// Initialize the lexical scanner.
cmDependsFortran_yylex_init(&this->Scanner);
cmDependsFortran_yyset_extra(this, this->Scanner);
// Create a dummy buffer that is never read but is the fallback
// buffer when the last file is popped off the stack.
YY_BUFFER_STATE buffer =
cmDependsFortran_yy_create_buffer(0, 4, this->Scanner);
cmDependsFortran_yy_switch_to_buffer(buffer, this->Scanner);
}
//----------------------------------------------------------------------------
cmDependsFortranParser_s::~cmDependsFortranParser_s()
{
cmDependsFortran_yylex_destroy(this->Scanner);
}
//----------------------------------------------------------------------------
int cmDependsFortranParser_FilePush(cmDependsFortranParser* parser,
const char* fname)
{
// Open the new file and push it onto the stack. Save the old
// buffer with it on the stack.
if(FILE* file = fopen(fname, "rb"))
{
YY_BUFFER_STATE current =
cmDependsFortranLexer_GetCurrentBuffer(parser->Scanner);
std::string dir = cmSystemTools::GetParentDirectory(fname);
cmDependsFortranFile f(file, current, dir);
YY_BUFFER_STATE buffer =
cmDependsFortran_yy_create_buffer(0, 16384, parser->Scanner);
cmDependsFortran_yy_switch_to_buffer(buffer, parser->Scanner);
parser->FileStack.push(f);
return 1;
}
else
{
return 0;
}
}
//----------------------------------------------------------------------------
int cmDependsFortranParser_FilePop(cmDependsFortranParser* parser)
{
// Pop one file off the stack and close it. Switch the lexer back
// to the next one on the stack.
if(parser->FileStack.empty())
{
return 0;
}
else
{
cmDependsFortranFile f = parser->FileStack.top(); parser->FileStack.pop();
fclose(f.File);
YY_BUFFER_STATE current =
cmDependsFortranLexer_GetCurrentBuffer(parser->Scanner);
cmDependsFortran_yy_delete_buffer(current, parser->Scanner);
cmDependsFortran_yy_switch_to_buffer(f.Buffer, parser->Scanner);
return 1;
}
}
//----------------------------------------------------------------------------
int cmDependsFortranParser_Input(cmDependsFortranParser* parser,
char* buffer, size_t bufferSize)
{
// Read from the file on top of the stack. If the stack is empty,
// the end of the translation unit has been reached.
if(!parser->FileStack.empty())
{
FILE* file = parser->FileStack.top().File;
return (int)fread(buffer, 1, bufferSize, file);
}
return 0;
}
//----------------------------------------------------------------------------
void cmDependsFortranParser_StringStart(cmDependsFortranParser* parser)
{
parser->TokenString = "";
}
//----------------------------------------------------------------------------
const char* cmDependsFortranParser_StringEnd(cmDependsFortranParser* parser)
{
return parser->TokenString.c_str();
}
//----------------------------------------------------------------------------
void cmDependsFortranParser_StringAppend(cmDependsFortranParser* parser,
char c)
{
parser->TokenString += c;
}
//----------------------------------------------------------------------------
void cmDependsFortranParser_SetInInterface(cmDependsFortranParser* parser,
int in)
{
parser->InInterface = in;
}
//----------------------------------------------------------------------------
int cmDependsFortranParser_GetInInterface(cmDependsFortranParser* parser)
{
return parser->InInterface;
}
//----------------------------------------------------------------------------
void cmDependsFortranParser_Error(cmDependsFortranParser*, const char*)
{
// If there is a parser error just ignore it. The source will not
// compile and the user will edit it. Then dependencies will have
// to be regenerated anyway.
}
//----------------------------------------------------------------------------
void cmDependsFortranParser_RuleUse(cmDependsFortranParser* parser,
const char* name)
{
parser->Requires.insert(name);
}
//----------------------------------------------------------------------------
void cmDependsFortranParser_RuleInclude(cmDependsFortranParser* parser,
const char* name)
{
// If processing an include statement there must be an open file.
assert(!parser->FileStack.empty());
// Get the directory containing the source in which the include
// statement appears. This is always the first search location for
// Fortran include files.
std::string dir = parser->FileStack.top().Directory;
// Find the included file. If it cannot be found just ignore the
// problem because either the source will not compile or the user
// does not care about depending on this included source.
std::string fullName;
if(parser->Self->FindIncludeFile(dir.c_str(), name, fullName))
{
// Found the included file. Save it in the set of included files.
parser->Includes.insert(fullName);
// Parse it immediately to translate the source inline.
cmDependsFortranParser_FilePush(parser, fullName.c_str());
}
}
//----------------------------------------------------------------------------
void cmDependsFortranParser_RuleModule(cmDependsFortranParser* parser,
const char* name)
{
parser->Provides.insert(name);
}
//----------------------------------------------------------------------------
void cmDependsFortranParser_RuleDefine(cmDependsFortranParser*, const char*)
{
}
//----------------------------------------------------------------------------
void cmDependsFortranParser_RuleUndef(cmDependsFortranParser*, const char*)
{
}
//----------------------------------------------------------------------------
void cmDependsFortranParser_RuleIfdef(cmDependsFortranParser*, const char*)
{
}
//----------------------------------------------------------------------------
void cmDependsFortranParser_RuleIfndef(cmDependsFortranParser*, const char*)
{
}
//----------------------------------------------------------------------------
void cmDependsFortranParser_RuleIf(cmDependsFortranParser*)
{
}
//----------------------------------------------------------------------------
void cmDependsFortranParser_RuleElif(cmDependsFortranParser*)
{
}
//----------------------------------------------------------------------------
void cmDependsFortranParser_RuleElse(cmDependsFortranParser*)
{
}
//----------------------------------------------------------------------------
void cmDependsFortranParser_RuleEndif(cmDependsFortranParser*)
{
}