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llvm-6502/tools/llvmc/Configuration.cpp
Reid Spencer dd04df0ec3 For PR495: 
Get rid of the difference between file paths and directory paths. The Path
class now simply stores a path that can refer to either a file or a
directory. This required various changes in the implementation and interface
of the class with the corresponding impact to its users. Doxygen comments were
also updated to reflect these changes. Interface changes are:

appendDirectory -> appendComponent
appendFile -> appendComponent
elideDirectory -> eraseComponent
elideFile -> eraseComponent
elideSuffix -> eraseSuffix
renameFile -> rename
setDirectory -> set
setFile -> set

Changes pass Dejagnu and llvm-test/SingleSource tests.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22349 91177308-0d34-0410-b5e6-96231b3b80d8
2005-07-07 23:21:43 +00:00

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//===- Configuration.cpp - Configuration Data Mgmt --------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by Reid Spencer and is distributed under the
// University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the parsing of configuration files for the LLVM Compiler
// Driver (llvmc).
//
//===------------------------------------------------------------------------===
#include "Configuration.h"
#include "ConfigLexer.h"
#include "CompilerDriver.h"
#include "llvm/Config/config.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/ADT/StringExtras.h"
#include <iostream>
#include <fstream>
using namespace llvm;
namespace sys {
// From CompilerDriver.cpp (for now)
extern bool FileIsReadable(const std::string& fname);
}
namespace llvm {
ConfigLexerInfo ConfigLexerState;
InputProvider* ConfigLexerInput = 0;
InputProvider::~InputProvider() {}
void InputProvider::error(const std::string& msg) {
std::cerr << name << ":" << ConfigLexerState.lineNum << ": Error: " <<
msg << "\n";
errCount++;
}
void InputProvider::checkErrors() {
if (errCount > 0) {
std::cerr << name << " had " << errCount << " errors. Terminating.\n";
exit(errCount);
}
}
}
namespace {
class FileInputProvider : public InputProvider {
public:
FileInputProvider(const std::string & fname)
: InputProvider(fname)
, F(fname.c_str()) {
ConfigLexerInput = this;
}
virtual ~FileInputProvider() { F.close(); ConfigLexerInput = 0; }
virtual unsigned read(char *buffer, unsigned max_size) {
if (F.good()) {
F.read(buffer,max_size);
if ( F.gcount() ) return F.gcount() - 1;
}
return 0;
}
bool okay() { return F.good(); }
private:
std::ifstream F;
};
cl::opt<bool> DumpTokens("dump-tokens", cl::Optional, cl::Hidden,
cl::init(false), cl::desc("Dump lexical tokens (debug use only)."));
struct Parser
{
Parser() {
token = EOFTOK;
provider = 0;
confDat = 0;
ConfigLexerState.lineNum = 1;
ConfigLexerState.in_value = false;
ConfigLexerState.StringVal.clear();
ConfigLexerState.IntegerVal = 0;
};
ConfigLexerTokens token;
InputProvider* provider;
CompilerDriver::ConfigData* confDat;
inline int next() {
token = Configlex();
if (DumpTokens)
std::cerr << token << "\n";
return token;
}
inline bool next_is_real() {
next();
return (token != EOLTOK) && (token != ERRORTOK) && (token != 0);
}
inline void eatLineRemnant() {
while (next_is_real()) ;
}
void error(const std::string& msg, bool skip = true) {
provider->error(msg);
if (skip)
eatLineRemnant();
}
bool parseCompleteItem(std::string& result) {
result.clear();
while (next_is_real()) {
switch (token ) {
case STRING :
case OPTION :
result += ConfigLexerState.StringVal;
break;
case SEPARATOR:
result += ".";
break;
case SPACE:
return true;
default:
return false;
}
}
return false;
}
std::string parseName() {
std::string result;
if (next() == EQUALS) {
if (parseCompleteItem(result))
eatLineRemnant();
if (result.empty())
error("Name exepected");
} else
error("Expecting '='");
return result;
}
bool parseBoolean() {
bool result = true;
if (next() == EQUALS) {
if (next() == SPACE)
next();
if (token == FALSETOK) {
result = false;
} else if (token != TRUETOK) {
error("Expecting boolean value");
return false;
}
if (next() != EOLTOK && token != 0) {
error("Extraneous tokens after boolean");
}
}
else
error("Expecting '='");
return result;
}
bool parseSubstitution(CompilerDriver::StringVector& optList) {
switch (token) {
case ARGS_SUBST: optList.push_back("%args%"); break;
case BINDIR_SUBST: optList.push_back("%bindir%"); break;
case DEFS_SUBST: optList.push_back("%defs%"); break;
case IN_SUBST: optList.push_back("%in%"); break;
case INCLS_SUBST: optList.push_back("%incls%"); break;
case LIBDIR_SUBST: optList.push_back("%libdir%"); break;
case LIBS_SUBST: optList.push_back("%libs%"); break;
case OPT_SUBST: optList.push_back("%opt%"); break;
case OUT_SUBST: optList.push_back("%out%"); break;
case TARGET_SUBST: optList.push_back("%target%"); break;
case STATS_SUBST: optList.push_back("%stats%"); break;
case TIME_SUBST: optList.push_back("%time%"); break;
case VERBOSE_SUBST: optList.push_back("%verbose%"); break;
case FOPTS_SUBST: optList.push_back("%fOpts%"); break;
case MOPTS_SUBST: optList.push_back("%Mopts%"); break;
case WOPTS_SUBST: optList.push_back("%Wopts%"); break;
default:
return false;
}
return true;
}
void parseOptionList(CompilerDriver::StringVector& optList ) {
if (next() == EQUALS) {
while (next_is_real()) {
if (token == STRING || token == OPTION)
optList.push_back(ConfigLexerState.StringVal);
else if (!parseSubstitution(optList)) {
error("Expecting a program argument or substitution", false);
break;
}
}
} else
error("Expecting '='");
}
void parseVersion() {
if (next() != EQUALS)
error("Expecting '='");
while (next_is_real()) {
if (token == STRING || token == OPTION)
confDat->version = ConfigLexerState.StringVal;
else
error("Expecting a version string");
}
}
void parseLibs() {
if (next() != EQUALS)
error("Expecting '='");
std::string lib;
while (parseCompleteItem(lib)) {
if (!lib.empty()) {
confDat->libpaths.push_back(lib);
}
}
}
void parseLang() {
if (next() != SEPARATOR)
error("Expecting '.'");
switch (next() ) {
case LIBS:
parseLibs();
break;
case NAME:
confDat->langName = parseName();
break;
case OPT1:
parseOptionList(confDat->opts[CompilerDriver::OPT_FAST_COMPILE]);
break;
case OPT2:
parseOptionList(confDat->opts[CompilerDriver::OPT_SIMPLE]);
break;
case OPT3:
parseOptionList(confDat->opts[CompilerDriver::OPT_AGGRESSIVE]);
break;
case OPT4:
parseOptionList(confDat->opts[CompilerDriver::OPT_LINK_TIME]);
break;
case OPT5:
parseOptionList(
confDat->opts[CompilerDriver::OPT_AGGRESSIVE_LINK_TIME]);
break;
default:
error("Expecting 'name' or 'optN' after 'lang.'");
break;
}
}
bool parseProgramName(std::string& str) {
str.clear();
do {
switch (token) {
case OPTION:
case STRING:
case ARGS_SUBST:
case DEFS_SUBST:
case IN_SUBST:
case INCLS_SUBST:
case LIBS_SUBST:
case OPT_SUBST:
case OUT_SUBST:
case STATS_SUBST:
case TARGET_SUBST:
case TIME_SUBST:
case VERBOSE_SUBST:
case FOPTS_SUBST:
case MOPTS_SUBST:
case WOPTS_SUBST:
str += ConfigLexerState.StringVal;
break;
case SEPARATOR:
str += ".";
break;
case ASSEMBLY:
str += "assembly";
break;
case BYTECODE:
str += "bytecode";
break;
case TRUETOK:
str += "true";
break;
case FALSETOK:
str += "false";
break;
default:
break;
}
next();
} while (token != SPACE && token != EOFTOK && token != EOLTOK &&
token != ERRORTOK);
return !str.empty();
}
void parseCommand(CompilerDriver::Action& action) {
if (next() != EQUALS)
error("Expecting '='");
switch (next()) {
case EOLTOK:
// no value (valid)
action.program.clear();
action.args.clear();
break;
case SPACE:
next();
/* FALL THROUGH */
default:
{
std::string progname;
if (parseProgramName(progname))
action.program.set(progname);
else
error("Expecting a program name");
// Get the options
std::string anOption;
while (next_is_real()) {
switch (token) {
case STRING:
case OPTION:
anOption += ConfigLexerState.StringVal;
break;
case ASSEMBLY:
anOption += "assembly";
break;
case BYTECODE:
anOption += "bytecode";
break;
case TRUETOK:
anOption += "true";
break;
case FALSETOK:
anOption += "false";
break;
case SEPARATOR:
anOption += ".";
break;
case SPACE:
action.args.push_back(anOption);
anOption.clear();
break;
default:
if (!parseSubstitution(action.args))
error("Expecting a program argument or substitution", false);
break;
}
}
}
}
}
void parsePreprocessor() {
if (next() != SEPARATOR)
error("Expecting '.'");
switch (next()) {
case COMMAND:
parseCommand(confDat->PreProcessor);
break;
case REQUIRED:
if (parseBoolean())
confDat->PreProcessor.set(CompilerDriver::REQUIRED_FLAG);
else
confDat->PreProcessor.clear(CompilerDriver::REQUIRED_FLAG);
break;
default:
error("Expecting 'command' or 'required' but found '" +
ConfigLexerState.StringVal);
break;
}
}
bool parseOutputFlag() {
if (next() == EQUALS) {
if (next() == SPACE)
next();
if (token == ASSEMBLY) {
return true;
} else if (token == BYTECODE) {
return false;
} else {
error("Expecting output type value");
return false;
}
if (next() != EOLTOK && token != 0) {
error("Extraneous tokens after output value");
}
}
else
error("Expecting '='");
return false;
}
void parseTranslator() {
if (next() != SEPARATOR)
error("Expecting '.'");
switch (next()) {
case COMMAND:
parseCommand(confDat->Translator);
break;
case REQUIRED:
if (parseBoolean())
confDat->Translator.set(CompilerDriver::REQUIRED_FLAG);
else
confDat->Translator.clear(CompilerDriver::REQUIRED_FLAG);
break;
case PREPROCESSES:
if (parseBoolean())
confDat->Translator.set(CompilerDriver::PREPROCESSES_FLAG);
else
confDat->Translator.clear(CompilerDriver::PREPROCESSES_FLAG);
break;
case OUTPUT:
if (parseOutputFlag())
confDat->Translator.set(CompilerDriver::OUTPUT_IS_ASM_FLAG);
else
confDat->Translator.clear(CompilerDriver::OUTPUT_IS_ASM_FLAG);
break;
default:
error("Expecting 'command', 'required', 'preprocesses', or "
"'output' but found '" + ConfigLexerState.StringVal +
"' instead");
break;
}
}
void parseOptimizer() {
if (next() != SEPARATOR)
error("Expecting '.'");
switch (next()) {
case COMMAND:
parseCommand(confDat->Optimizer);
break;
case PREPROCESSES:
if (parseBoolean())
confDat->Optimizer.set(CompilerDriver::PREPROCESSES_FLAG);
else
confDat->Optimizer.clear(CompilerDriver::PREPROCESSES_FLAG);
break;
case TRANSLATES:
if (parseBoolean())
confDat->Optimizer.set(CompilerDriver::TRANSLATES_FLAG);
else
confDat->Optimizer.clear(CompilerDriver::TRANSLATES_FLAG);
break;
case REQUIRED:
if (parseBoolean())
confDat->Optimizer.set(CompilerDriver::REQUIRED_FLAG);
else
confDat->Optimizer.clear(CompilerDriver::REQUIRED_FLAG);
break;
case OUTPUT:
if (parseOutputFlag())
confDat->Translator.set(CompilerDriver::OUTPUT_IS_ASM_FLAG);
else
confDat->Translator.clear(CompilerDriver::OUTPUT_IS_ASM_FLAG);
break;
default:
error(std::string("Expecting 'command', 'preprocesses', "
"'translates' or 'output' but found '") +
ConfigLexerState.StringVal + "' instead");
break;
}
}
void parseAssembler() {
if (next() != SEPARATOR)
error("Expecting '.'");
switch(next()) {
case COMMAND:
parseCommand(confDat->Assembler);
break;
default:
error("Expecting 'command'");
break;
}
}
void parseLinker() {
if (next() != SEPARATOR)
error("Expecting '.'");
switch(next()) {
case LIBS:
break; //FIXME
case LIBPATHS:
break; //FIXME
default:
error("Expecting 'libs' or 'libpaths'");
break;
}
}
void parseAssignment() {
switch (token) {
case VERSION_TOK: parseVersion(); break;
case LANG: parseLang(); break;
case PREPROCESSOR: parsePreprocessor(); break;
case TRANSLATOR: parseTranslator(); break;
case OPTIMIZER: parseOptimizer(); break;
case ASSEMBLER: parseAssembler(); break;
case LINKER: parseLinker(); break;
case EOLTOK: break; // just ignore
case ERRORTOK:
default:
error("Invalid top level configuration item");
break;
}
}
void parseFile() {
while ( next() != EOFTOK ) {
if (token == ERRORTOK)
error("Invalid token");
else if (token != EOLTOK)
parseAssignment();
}
provider->checkErrors();
}
};
void
ParseConfigData(InputProvider& provider, CompilerDriver::ConfigData& confDat) {
Parser p;
p.token = EOFTOK;
p.provider = &provider;
p.confDat = &confDat;
p.parseFile();
}
}
CompilerDriver::ConfigData*
LLVMC_ConfigDataProvider::ReadConfigData(const std::string& ftype) {
CompilerDriver::ConfigData* result = 0;
sys::Path confFile;
if (configDir.isEmpty()) {
// Try the environment variable
const char* conf = getenv("LLVM_CONFIG_DIR");
if (conf) {
confFile.set(conf);
confFile.appendComponent(ftype);
if (!confFile.canRead())
throw std::string("Configuration file for '") + ftype +
"' is not available.";
} else {
// Try the user's home directory
confFile = sys::Path::GetUserHomeDirectory();
if (!confFile.isEmpty()) {
confFile.appendComponent(".llvm");
confFile.appendComponent("etc");
confFile.appendComponent(ftype);
if (!confFile.canRead())
confFile.clear();
}
if (confFile.isEmpty()) {
// Okay, try the LLVM installation directory
confFile = sys::Path::GetLLVMConfigDir();
confFile.appendComponent(ftype);
if (!confFile.canRead()) {
// Okay, try the "standard" place
confFile = sys::Path::GetLLVMDefaultConfigDir();
confFile.appendComponent(ftype);
if (!confFile.canRead()) {
throw std::string("Configuration file for '") + ftype +
"' is not available.";
}
}
}
}
} else {
confFile = configDir;
confFile.appendComponent(ftype);
if (!confFile.canRead())
throw std::string("Configuration file for '") + ftype +
"' is not available.";
}
FileInputProvider fip( confFile.toString() );
if (!fip.okay()) {
throw std::string("Configuration file for '") + ftype +
"' is not available.";
}
result = new CompilerDriver::ConfigData();
ParseConfigData(fip,*result);
return result;
}
LLVMC_ConfigDataProvider::~LLVMC_ConfigDataProvider()
{
ConfigDataMap::iterator cIt = Configurations.begin();
while (cIt != Configurations.end()) {
CompilerDriver::ConfigData* cd = cIt->second;
++cIt;
delete cd;
}
Configurations.clear();
}
CompilerDriver::ConfigData*
LLVMC_ConfigDataProvider::ProvideConfigData(const std::string& filetype) {
CompilerDriver::ConfigData* result = 0;
if (!Configurations.empty()) {
ConfigDataMap::iterator cIt = Configurations.find(filetype);
if ( cIt != Configurations.end() ) {
// We found one in the case, return it.
result = cIt->second;
}
}
if (result == 0) {
// The configuration data doesn't exist, we have to go read it.
result = ReadConfigData(filetype);
// If we got one, cache it
if (result != 0)
Configurations.insert(std::make_pair(filetype,result));
}
return result; // Might return 0
}
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