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construction of configuration data for compiler front ends. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15727 91177308-0d34-0410-b5e6-96231b3b80d8
442 lines
12 KiB
C++
442 lines
12 KiB
C++
//===- ConfigData.cpp - Configuration Data Mgmt -----------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by Reid Spencer and is distributed under the
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// University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the parsing of configuration files for the LLVM Compiler
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// Driver (llvmc).
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//
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//===------------------------------------------------------------------------===
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#include "ConfigData.h"
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#include "CompilerDriver.h"
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#include "Support/StringExtras.h"
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#include <iostream>
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using namespace llvm;
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namespace {
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// This array of strings provides the input for ".ll" files (LLVM Assembly)
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// to the configuration file parser. This data is just "built-in" to
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// llvmc so it doesn't have to be read from a configuration file.
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static const char* LL_Data[] = {
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"lang.name=LLVM Assembly",
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"lang.translator.preprocesses=false",
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"lang.translator.optimizes=No",
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"lang.translator.groks_dash_O=No",
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"lang.preprocessor.needed=0",
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"preprocessor.prog=",
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"preprocessor.args=",
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"translator.prog=llvm-as",
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"translator.args=@in@ -o @out@",
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"optimizer.prog=opt",
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"optimizer.args=@in@ -o @out@",
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"assembler.prog=llc",
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"assembler.args=@in@ -o @out@",
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"linker.prog=llvm-link",
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"linker.args=@in@ -o @out@"
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};
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// This array of strings provides the input for ".st" files (Stacker).
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static const char* ST_Data[] = {
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"lang.name=Stacker",
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"lang.translator.preprocesses=false",
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"lang.translator.optimizes=true",
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"lang.translator.groks_dash_O=0",
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"lang.preprocessor.needed=0",
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"preprocessor.prog=cp",
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"preprocessor.args=@in@ @out@",
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"translator.prog=stkrc",
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"translator.args=@in@ -o @out@ -S 2048",
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"optimizer.prog=opt",
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"optimizer.args=@in@ -o @out@",
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"assembler.prog=llc",
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"assembler.args=@in@ -o @out@",
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"linker.prog=llvm-link",
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"linker.args=@in@ -o @out@"
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};
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class InputProvider {
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public:
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virtual bool getLine(std::string& line) = 0;
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virtual void error(const std::string& msg) = 0;
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virtual bool errorOccurred() = 0;
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};
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class StaticInputProvider : public InputProvider {
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public:
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StaticInputProvider(const char *data[], size_t count,
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const std::string& nam) {
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TheData = data;
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limit = count;
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where = 0;
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name = nam;
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errCount = 0;
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}
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virtual ~StaticInputProvider() {}
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virtual bool getLine(std::string& line) {
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if ( where >= limit ) return false;
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line = TheData[where++];
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return true;
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}
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virtual void error(const std::string& msg) {
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std::cerr << name << ":" << where << ": Error: " << msg << "\n";
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errCount++;
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}
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virtual bool errorOccurred() { return errCount > 0; };
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private:
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const char**TheData;
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size_t limit;
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size_t where;
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std::string name;
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size_t errCount;
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};
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inline bool recognize(const char*& p, const char*token) {
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while (*p == *token && *token != '\0')
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++token, p++;
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return *token == '\0' && ((*p == '\0') || ( *p == '.' ) || (*p == '='));
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}
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inline bool getBoolean(const std::string& value) {
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switch (value[0]) {
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case 't':
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case 'T':
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case '1':
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case 'y':
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case 'Y':
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return true;
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default :
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return false;
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}
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return false;
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}
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inline void skipWhitespace( size_t& pos, const std::string& line ) {
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while (pos < line.size() && (
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line[pos] == ' ' || // Space
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line[pos] == '\t' || // Horizontal Tab
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line[pos] == '\n' || // New Line
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line[pos] == '\v' || // Vertical Tab
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line[pos] == '\f' || // Form Feed
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line[pos] == '\r') // Carriate Return
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)
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pos++;
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}
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inline void parseArgs(CompilerDriver::Action& pat,
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const std::string& value,
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InputProvider& provider )
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{
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const char* p = value.c_str();
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const char* argStart = p;
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while (*p != '\0') {
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switch (*p) {
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case ' ':
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if (argStart != p)
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pat.args.push_back(std::string(argStart, p-argStart));
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argStart = ++p;
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break;
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case '@' :
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{
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if (argStart != p)
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pat.args.push_back(std::string(argStart,p-argStart));
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const char* token = ++p;
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while (*p != '@' && *p != 0)
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p++;
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if ( *p != '@' ) {
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provider.error("Unterminated substitution token");
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return;
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} else {
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p++;
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bool legal = false;
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switch (token[0]) {
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case 'i':
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if (token[1] == 'n' && token[2] == '@' ) {
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pat.inputAt = pat.args.size();
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pat.args.push_back("in");
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legal = true;
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argStart = p;
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}
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break;
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case 'o':
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if (token[1] == 'u' && token[2] == 't' && token[3] == '@') {
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pat.outputAt = pat.args.size();
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pat.args.push_back("out");
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legal = true;
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argStart = p;
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}
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break;
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default:
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break;
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}
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if (!legal) {
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provider.error("Invalid substitution token");
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return;
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}
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}
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}
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break;
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default :
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p++;
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break;
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}
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}
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}
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CompilerDriver::ConfigData*
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ParseConfigData(InputProvider& provider) {
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std::string line;
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CompilerDriver::ConfigData data;
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while ( provider.getLine(line) ) {
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// Check line length first
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size_t lineLen = line.size();
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if (lineLen > 4096)
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provider.error("length of input line (" + utostr(lineLen) +
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") is too long");
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// First, skip whitespace
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size_t stPos = 0;
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skipWhitespace(stPos, line);
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// See if there's a hash mark. It and everything after it is
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// ignored so lets delete that now.
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size_t hashPos = line.find('#');
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if (hashPos != std::string::npos)
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line.erase(hashPos);
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// Make sure we have something left to parse
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if (line.size() == 0)
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continue; // ignore full-line comment or whitespace line
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// Find the equals sign
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size_t eqPos = line.find('=');
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if (eqPos == std::string::npos)
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provider.error("Configuration directive is missing an =");
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// extract the item name
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std::string name(line, stPos, eqPos-stPos);
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// directives without names are illegal
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if (name.empty())
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provider.error("Configuration directive name is empty");
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// Skip whitespace in the value
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size_t valPos = eqPos + 1;
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skipWhitespace(valPos, line);
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// Skip white space at end of value
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size_t endPos = line.length() - 1;
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while (line[endPos] == ' ')
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endPos--;
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// extract the item value
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std::string value(line, valPos, endPos-valPos+1);
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// Get the configuration item as a char pointer
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const char*p = name.c_str();
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// Indicate we haven't found an invalid item yet.
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bool invalidItem = false;
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// Parse the contents by examining first character and
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// using the recognize function strategically
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switch (*p++) {
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case 'l' :
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// could it be "lang."
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if (*p == 'a') { // "lang." ?
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if (recognize(p,"ang")) {
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p++;
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switch (*p++) {
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case 'n':
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if (recognize(p,"ame"))
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data.langName = value;
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else
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invalidItem = true;
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break;
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case 't':
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if (recognize(p,"ranslator")) {
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p++;
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if (recognize(p,"preprocesses"))
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data.TranslatorPreprocesses = getBoolean(value);
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else if (recognize(p, "optimizes"))
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data.TranslatorOptimizes = getBoolean(value);
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else if (recognize(p, "groks_dash_O"))
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data.TranslatorGroksDashO = getBoolean(value);
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else
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invalidItem = true;
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}
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else
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invalidItem = true;
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break;
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case 'p':
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if (recognize(p,"reprocessor")) {
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p++;
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if (recognize(p,"needed")) {
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data.PreprocessorNeeded = getBoolean(value);
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} else
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invalidItem = true;
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}
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else
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invalidItem = true;
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break;
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default:
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invalidItem = true;
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break;
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}
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}
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} else if (*p == 'i') { // "linker." ?
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if (recognize(p,"inker")) {
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p++;
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if (recognize(p,"prog"))
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data.Linker.program = value;
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else if (recognize(p,"args"))
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parseArgs(data.Linker,value,provider);
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else
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invalidItem = true;
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}
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else
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invalidItem = true;
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} else {
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invalidItem = true;
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}
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break;
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case 'p' :
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if (*p == 'r') { // "preprocessor." ?
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if (recognize(p, "reprocessor")) {
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p++;
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if (recognize(p,"prog"))
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data.PreProcessor.program = value;
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else if (recognize(p,"args"))
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parseArgs(data.PreProcessor,value,provider);
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else
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invalidItem = true;
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} else
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invalidItem = true;
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} else {
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invalidItem = true;
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}
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break;
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case 't' :
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if (*p == 'r') { // "translator." ?
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if (recognize(p, "ranslator")) {
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p++;
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if (recognize(p,"prog"))
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data.Translator.program = value;
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else if (recognize(p,"args"))
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parseArgs(data.Translator,value,provider);
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else
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invalidItem = true;
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} else
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invalidItem = true;
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} else {
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invalidItem = true;
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}
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break;
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case 'o' :
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if (*p == 'p') { // "optimizer." ?
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if (recognize(p, "ptimizer")) {
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p++;
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if (recognize(p,"prog"))
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data.Optimizer.program = value;
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else if (recognize(p,"args"))
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parseArgs(data.Optimizer,value,provider);
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else
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invalidItem = true;
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} else
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invalidItem = true;
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} else {
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invalidItem = true;
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}
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break;
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case 'a' :
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if (*p == 's') { // "assembler." ?
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if (recognize(p, "ssembler")) {
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p++;
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if (recognize(p,"prog"))
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data.Assembler.program = value;
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else if (recognize(p,"args"))
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parseArgs(data.Assembler,value,provider);
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else
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invalidItem = true;
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} else
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invalidItem = true;
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} else {
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invalidItem = true;
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}
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break;
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}
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if (invalidItem)
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provider.error("Invalid configuration item: " + line.substr(stPos, eqPos-stPos));
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}
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return new CompilerDriver::ConfigData(data);
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}
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CompilerDriver::ConfigData*
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ReadConfigData(const std::string& ftype) {
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if ( ftype == "ll" ) {
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StaticInputProvider sip(LL_Data, sizeof(LL_Data)/sizeof(LL_Data[0]),
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"LLVM Assembly (internal)");
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return ParseConfigData(sip);
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} else if (ftype == "st") {
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StaticInputProvider sip(ST_Data, sizeof(ST_Data)/sizeof(ST_Data[0]),
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"Stacker (internal)");
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return ParseConfigData(sip);
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}
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return 0;
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}
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}
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LLVMC_ConfigDataProvider::LLVMC_ConfigDataProvider()
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: Configurations()
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, configDir()
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{
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Configurations.clear();
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}
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LLVMC_ConfigDataProvider::~LLVMC_ConfigDataProvider()
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{
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ConfigDataMap::iterator cIt = Configurations.begin();
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while (cIt != Configurations.end()) {
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CompilerDriver::ConfigData* cd = cIt->second;
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++cIt;
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delete cd;
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}
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Configurations.clear();
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}
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CompilerDriver::ConfigData*
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LLVMC_ConfigDataProvider::ProvideConfigData(const std::string& filetype) {
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CompilerDriver::ConfigData* result = 0;
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if (!Configurations.empty()) {
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ConfigDataMap::iterator cIt = Configurations.find(filetype);
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if ( cIt != Configurations.end() ) {
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// We found one in the case, return it.
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result = cIt->second;
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}
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}
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if (result == 0) {
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// The configuration data doesn't exist, we have to go read it.
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result = ReadConfigData(filetype);
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// If we got one, cache it
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if ( result != 0 )
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Configurations.insert(std::make_pair(filetype,result));
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}
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return result; // Might return 0
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}
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// vim: sw=2 smartindent smarttab tw=80 autoindent expandtab
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