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llvm-6502/tools/llvmc/Configuration.cpp
Reid Spencer bf43772038 More Functionality: 
- cleaned up lexical scanner
- added support for "lang.optN" configuration items
- added temporary file support (ala lib/System)
- corrected logic for deciding which phases to run
- consolidated the Action and ActionPattern classes


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15765 91177308-0d34-0410-b5e6-96231b3b80d8
2004-08-15 08:19:46 +00:00

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//===- ConfigData.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 "ConfigData.h"
#include "ConfigLexer.h"
#include "CompilerDriver.h"
#include "Support/StringExtras.h"
#include <iostream>
#include <fstream>
using namespace llvm;
extern int ::Configlineno;
namespace llvm {
ConfigLexerInfo ConfigLexerData;
InputProvider* ConfigLexerInput = 0;
InputProvider::~InputProvider() {}
void InputProvider::error(const std::string& msg) {
std::cerr << name << ":" << Configlineno << ": 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;
};
struct Parser
{
ConfigLexerTokens token;
InputProvider* provider;
CompilerDriver::ConfigData* confDat;
CompilerDriver::Action* action;
int next() { return token = Configlex(); }
bool next_is_real() {
token = Configlex();
return (token != EOLTOK) && (token != ERRORTOK) && (token != 0);
}
void eatLineRemnant() {
while (next_is_real()) ;
}
void error(const std::string& msg, bool skip = true) {
provider->error(msg);
if (skip)
eatLineRemnant();
}
std::string parseName() {
std::string result;
if (next() == EQUALS) {
while (next_is_real()) {
switch (token ) {
case STRING :
case OPTION :
result += ConfigLexerData.StringVal + " ";
break;
default:
error("Invalid name");
break;
}
}
if (result.empty())
error("Name exepected");
else
result.erase(result.size()-1,1);
} else
error("= expected");
return result;
}
bool parseBoolean() {
bool result = true;
if (next() == EQUALS) {
if (next() == 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;
}
void parseOptionList(CompilerDriver::StringVector& optList ) {
while (next_is_real()) {
if (token == STRING || token == OPTION)
optList.push_back(ConfigLexerData.StringVal);
else {
error("Expecting a program option", false);
break;
}
}
}
void parseLang() {
switch (next() ) {
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;
}
}
void parseCommand(CompilerDriver::Action& action) {
if (next() == EQUALS) {
if (next() == EOLTOK) {
// no value (valid)
action.program.clear();
action.args.clear();
action.inputAt = 0;
action.outputAt = 0;
} else {
if (token == STRING || token == OPTION) {
action.program = ConfigLexerData.StringVal;
} else {
error("Expecting a program name");
}
while (next_is_real()) {
if (token == STRING || token == OPTION) {
action.args.push_back(ConfigLexerData.StringVal);
} else if (token == IN_SUBST) {
action.inputAt = action.args.size();
action.args.push_back("@in@");
} else if (token == OUT_SUBST) {
action.outputAt = action.args.size();
action.args.push_back("@out@");
} else {
error("Expecting a program argument", false);
break;
}
}
}
}
}
void parsePreprocessor() {
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'");
break;
}
}
void parseTranslator() {
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 OPTIMIZES:
if (parseBoolean())
confDat->Translator.set(CompilerDriver::OPTIMIZES_FLAG);
else
confDat->Translator.clear(CompilerDriver::OPTIMIZES_FLAG);
break;
case GROKS_DASH_O:
if (parseBoolean())
confDat->Translator.set(CompilerDriver::GROKS_DASH_O_FLAG);
else
confDat->Translator.clear(CompilerDriver::GROKS_DASH_O_FLAG);
break;
case GROKS_O10N:
if (parseBoolean())
confDat->Translator.set(CompilerDriver::GROKS_O10N_FLAG);
else
confDat->Translator.clear(CompilerDriver::GROKS_O10N_FLAG);
break;
default:
error("Expecting 'command', 'required', 'preprocesses', "
"'groks_dash_O' or 'optimizes'");
break;
}
}
void parseOptimizer() {
switch (next()) {
case COMMAND:
parseCommand(confDat->Optimizer);
break;
case GROKS_DASH_O:
if (parseBoolean())
confDat->Optimizer.set(CompilerDriver::GROKS_DASH_O_FLAG);
else
confDat->Optimizer.clear(CompilerDriver::GROKS_DASH_O_FLAG);
break;
case GROKS_O10N:
if (parseBoolean())
confDat->Optimizer.set(CompilerDriver::GROKS_O10N_FLAG);
else
confDat->Optimizer.clear(CompilerDriver::GROKS_O10N_FLAG);
break;
default:
error("Expecting 'command' or 'groks_dash_O'");
break;
}
}
void parseAssembler() {
switch(next()) {
case COMMAND:
parseCommand(confDat->Assembler);
break;
default:
error("Expecting 'command'");
break;
}
}
void parseLinker() {
switch(next()) {
case COMMAND:
parseCommand(confDat->Linker);
break;
case GROKS_DASH_O:
if (parseBoolean())
confDat->Linker.set(CompilerDriver::GROKS_DASH_O_FLAG);
else
confDat->Linker.clear(CompilerDriver::GROKS_DASH_O_FLAG);
break;
case GROKS_O10N:
if (parseBoolean())
confDat->Linker.set(CompilerDriver::GROKS_O10N_FLAG);
else
confDat->Linker.clear(CompilerDriver::GROKS_O10N_FLAG);
break;
default:
error("Expecting 'command'");
break;
}
}
void parseAssignment() {
switch (token) {
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.action = 0;
p.parseFile();
}
}
CompilerDriver::ConfigData*
LLVMC_ConfigDataProvider::ReadConfigData(const std::string& ftype) {
CompilerDriver::ConfigData* result = 0;
if (configDir.empty()) {
FileInputProvider fip( std::string("/etc/llvm/") + ftype );
if (!fip.okay()) {
fip.error("Configuration for '" + ftype + "' is not available.");
fip.checkErrors();
}
else {
result = new CompilerDriver::ConfigData();
ParseConfigData(fip,*result);
}
} else {
FileInputProvider fip( configDir + "/" + ftype );
if (!fip.okay()) {
fip.error("Configuration for '" + ftype + "' is not available.");
fip.checkErrors();
}
else {
result = new CompilerDriver::ConfigData();
ParseConfigData(fip,*result);
}
}
return result;
}
LLVMC_ConfigDataProvider::LLVMC_ConfigDataProvider()
: Configurations()
, configDir()
{
Configurations.clear();
}
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
}
// vim: sw=2 smartindent smarttab tw=80 autoindent expandtab
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