+++ /dev/null
-//===- OptParserEmitter.cpp - Table Driven Command Line Parsing -----------===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/ADT/STLExtras.h"
-#include "llvm/ADT/SmallString.h"
-#include "llvm/ADT/Twine.h"
-#include "llvm/TableGen/Error.h"
-#include "llvm/TableGen/Record.h"
-#include "llvm/TableGen/TableGenBackend.h"
-#include <map>
-
-using namespace llvm;
-
-static int StrCmpOptionName(const char *A, const char *B) {
- char a = *A, b = *B;
- while (a == b) {
- if (a == '\0')
- return 0;
-
- a = *++A;
- b = *++B;
- }
-
- if (a == '\0') // A is a prefix of B.
- return 1;
- if (b == '\0') // B is a prefix of A.
- return -1;
-
- // Otherwise lexicographic.
- return (a < b) ? -1 : 1;
-}
-
-static int CompareOptionRecords(const void *Av, const void *Bv) {
- const Record *A = *(const Record*const*) Av;
- const Record *B = *(const Record*const*) Bv;
-
- // Sentinel options precede all others and are only ordered by precedence.
- bool ASent = A->getValueAsDef("Kind")->getValueAsBit("Sentinel");
- bool BSent = B->getValueAsDef("Kind")->getValueAsBit("Sentinel");
- if (ASent != BSent)
- return ASent ? -1 : 1;
-
- // Compare options by name, unless they are sentinels.
- if (!ASent)
- if (int Cmp = StrCmpOptionName(A->getValueAsString("Name").c_str(),
- B->getValueAsString("Name").c_str()))
- return Cmp;
-
- if (!ASent) {
- std::vector<std::string> APrefixes = A->getValueAsListOfStrings("Prefixes");
- std::vector<std::string> BPrefixes = B->getValueAsListOfStrings("Prefixes");
-
- for (std::vector<std::string>::const_iterator APre = APrefixes.begin(),
- AEPre = APrefixes.end(),
- BPre = BPrefixes.begin(),
- BEPre = BPrefixes.end();
- APre != AEPre &&
- BPre != BEPre;
- ++APre, ++BPre) {
- if (int Cmp = StrCmpOptionName(APre->c_str(), BPre->c_str()))
- return Cmp;
- }
- }
-
- // Then by the kind precedence;
- int APrec = A->getValueAsDef("Kind")->getValueAsInt("Precedence");
- int BPrec = B->getValueAsDef("Kind")->getValueAsInt("Precedence");
- if (APrec == BPrec &&
- A->getValueAsListOfStrings("Prefixes") ==
- B->getValueAsListOfStrings("Prefixes")) {
- PrintError(A->getLoc(), Twine("Option is equivilent to"));
- PrintError(B->getLoc(), Twine("Other defined here"));
- PrintFatalError("Equivalent Options found.");
- }
- return APrec < BPrec ? -1 : 1;
-}
-
-static const std::string getOptionName(const Record &R) {
- // Use the record name unless EnumName is defined.
- if (isa<UnsetInit>(R.getValueInit("EnumName")))
- return R.getName();
-
- return R.getValueAsString("EnumName");
-}
-
-static raw_ostream &write_cstring(raw_ostream &OS, llvm::StringRef Str) {
- OS << '"';
- OS.write_escaped(Str);
- OS << '"';
- return OS;
-}
-
-/// OptParserEmitter - This tablegen backend takes an input .td file
-/// describing a list of options and emits a data structure for parsing and
-/// working with those options when given an input command line.
-namespace clang {
-void EmitOptParser(RecordKeeper &Records, raw_ostream &OS, bool GenDefs) {
- // Get the option groups and options.
- const std::vector<Record*> &Groups =
- Records.getAllDerivedDefinitions("OptionGroup");
- std::vector<Record*> Opts = Records.getAllDerivedDefinitions("Option");
-
- if (GenDefs)
- emitSourceFileHeader("Option Parsing Definitions", OS);
- else
- emitSourceFileHeader("Option Parsing Table", OS);
-
- array_pod_sort(Opts.begin(), Opts.end(), CompareOptionRecords);
- if (GenDefs) {
- // Generate prefix groups.
- typedef SmallVector<SmallString<2>, 2> PrefixKeyT;
- typedef std::map<PrefixKeyT, std::string> PrefixesT;
- PrefixesT Prefixes;
- Prefixes.insert(std::make_pair(PrefixKeyT(), "prefix_0"));
- unsigned CurPrefix = 0;
- for (unsigned i = 0, e = Opts.size(); i != e; ++i) {
- const Record &R = *Opts[i];
- std::vector<std::string> prf = R.getValueAsListOfStrings("Prefixes");
- PrefixKeyT prfkey(prf.begin(), prf.end());
- unsigned NewPrefix = CurPrefix + 1;
- if (Prefixes.insert(std::make_pair(prfkey, (Twine("prefix_") +
- Twine(NewPrefix)).str())).second)
- CurPrefix = NewPrefix;
- }
-
- OS << "#ifndef PREFIX\n";
- OS << "#error \"Define PREFIX prior to including this file!\"\n";
- OS << "#endif\n\n";
-
- // Dump prefixes.
- OS << "/////////\n";
- OS << "// Prefixes\n\n";
- OS << "#define COMMA ,\n";
- for (PrefixesT::const_iterator I = Prefixes.begin(), E = Prefixes.end();
- I != E; ++I) {
- OS << "PREFIX(";
-
- // Prefix name.
- OS << I->second;
-
- // Prefix values.
- OS << ", {";
- for (PrefixKeyT::const_iterator PI = I->first.begin(),
- PE = I->first.end(); PI != PE; ++PI) {
- OS << "\"" << *PI << "\" COMMA ";
- }
- OS << "0})\n";
- }
- OS << "#undef COMMA\n";
- OS << "\n";
-
- OS << "#ifndef OPTION\n";
- OS << "#error \"Define OPTION prior to including this file!\"\n";
- OS << "#endif\n\n";
-
- OS << "/////////\n";
- OS << "// Groups\n\n";
- for (unsigned i = 0, e = Groups.size(); i != e; ++i) {
- const Record &R = *Groups[i];
-
- // Start a single option entry.
- OS << "OPTION(";
-
- // The option prefix;
- OS << "0";
-
- // The option string.
- OS << ", \"" << R.getValueAsString("Name") << '"';
-
- // The option identifier name.
- OS << ", "<< getOptionName(R);
-
- // The option kind.
- OS << ", Group";
-
- // The containing option group (if any).
- OS << ", ";
- if (const DefInit *DI = dyn_cast<DefInit>(R.getValueInit("Group")))
- OS << getOptionName(*DI->getDef());
- else
- OS << "INVALID";
-
- // The other option arguments (unused for groups).
- OS << ", INVALID, 0, 0";
-
- // The option help text.
- if (!isa<UnsetInit>(R.getValueInit("HelpText"))) {
- OS << ",\n";
- OS << " ";
- write_cstring(OS, R.getValueAsString("HelpText"));
- } else
- OS << ", 0";
-
- // The option meta-variable name (unused).
- OS << ", 0)\n";
- }
- OS << "\n";
-
- OS << "//////////\n";
- OS << "// Options\n\n";
- for (unsigned i = 0, e = Opts.size(); i != e; ++i) {
- const Record &R = *Opts[i];
-
- // Start a single option entry.
- OS << "OPTION(";
-
- // The option prefix;
- std::vector<std::string> prf = R.getValueAsListOfStrings("Prefixes");
- OS << Prefixes[PrefixKeyT(prf.begin(), prf.end())] << ", ";
-
- // The option string.
- write_cstring(OS, R.getValueAsString("Name"));
-
- // The option identifier name.
- OS << ", "<< getOptionName(R);
-
- // The option kind.
- OS << ", " << R.getValueAsDef("Kind")->getValueAsString("Name");
-
- // The containing option group (if any).
- OS << ", ";
- if (const DefInit *DI = dyn_cast<DefInit>(R.getValueInit("Group")))
- OS << getOptionName(*DI->getDef());
- else
- OS << "INVALID";
-
- // The option alias (if any).
- OS << ", ";
- if (const DefInit *DI = dyn_cast<DefInit>(R.getValueInit("Alias")))
- OS << getOptionName(*DI->getDef());
- else
- OS << "INVALID";
-
- // The option flags.
- const ListInit *LI = R.getValueAsListInit("Flags");
- if (LI->empty()) {
- OS << ", 0";
- } else {
- OS << ", ";
- for (unsigned i = 0, e = LI->size(); i != e; ++i) {
- if (i)
- OS << " | ";
- OS << cast<DefInit>(LI->getElement(i))->getDef()->getName();
- }
- }
-
- // The option parameter field.
- OS << ", " << R.getValueAsInt("NumArgs");
-
- // The option help text.
- if (!isa<UnsetInit>(R.getValueInit("HelpText"))) {
- OS << ",\n";
- OS << " ";
- write_cstring(OS, R.getValueAsString("HelpText"));
- } else
- OS << ", 0";
-
- // The option meta-variable name.
- OS << ", ";
- if (!isa<UnsetInit>(R.getValueInit("MetaVarName")))
- write_cstring(OS, R.getValueAsString("MetaVarName"));
- else
- OS << "0";
-
- OS << ")\n";
- }
- }
-}
-} // end namespace clang
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