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https://github.com/c64scene-ar/llvm-6502.git
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92521 91177308-0d34-0410-b5e6-96231b3b80d8
195 lines
5.4 KiB
C++
195 lines
5.4 KiB
C++
//===- OptParserEmitter.cpp - Table Driven Command Line Parsing -----------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "OptParserEmitter.h"
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#include "Record.h"
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#include "llvm/ADT/STLExtras.h"
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using namespace llvm;
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static int StrCmpOptionName(const char *A, const char *B) {
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char a = *A, b = *B;
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while (a == b) {
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if (a == '\0')
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return 0;
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a = *++A;
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b = *++B;
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}
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if (a == '\0') // A is a prefix of B.
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return 1;
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if (b == '\0') // B is a prefix of A.
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return -1;
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// Otherwise lexicographic.
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return (a < b) ? -1 : 1;
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}
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static int CompareOptionRecords(const void *Av, const void *Bv) {
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const Record *A = *(Record**) Av;
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const Record *B = *(Record**) Bv;
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// Sentinel options preceed all others and are only ordered by precedence.
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bool ASent = A->getValueAsDef("Kind")->getValueAsBit("Sentinel");
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bool BSent = B->getValueAsDef("Kind")->getValueAsBit("Sentinel");
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if (ASent != BSent)
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return ASent ? -1 : 1;
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// Compare options by name, unless they are sentinels.
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if (!ASent)
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if (int Cmp = StrCmpOptionName(A->getValueAsString("Name").c_str(),
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B->getValueAsString("Name").c_str()))
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return Cmp;
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// Then by the kind precedence;
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int APrec = A->getValueAsDef("Kind")->getValueAsInt("Precedence");
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int BPrec = B->getValueAsDef("Kind")->getValueAsInt("Precedence");
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assert(APrec != BPrec && "Options are equivalent!");
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return APrec < BPrec ? -1 : 1;
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}
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static const std::string getOptionName(const Record &R) {
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// Use the record name unless EnumName is defined.
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if (dynamic_cast<UnsetInit*>(R.getValueInit("EnumName")))
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return R.getName();
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return R.getValueAsString("EnumName");
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}
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static raw_ostream &write_cstring(raw_ostream &OS, llvm::StringRef Str) {
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OS << '"';
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OS.write_escaped(Str);
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OS << '"';
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return OS;
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}
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void OptParserEmitter::run(raw_ostream &OS) {
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// Get the option groups and options.
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const std::vector<Record*> &Groups =
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Records.getAllDerivedDefinitions("OptionGroup");
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std::vector<Record*> Opts = Records.getAllDerivedDefinitions("Option");
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if (GenDefs)
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EmitSourceFileHeader("Option Parsing Definitions", OS);
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else
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EmitSourceFileHeader("Option Parsing Table", OS);
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array_pod_sort(Opts.begin(), Opts.end(), CompareOptionRecords);
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if (GenDefs) {
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OS << "#ifndef OPTION\n";
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OS << "#error \"Define OPTION prior to including this file!\"\n";
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OS << "#endif\n\n";
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OS << "/////////\n";
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OS << "// Groups\n\n";
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for (unsigned i = 0, e = Groups.size(); i != e; ++i) {
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const Record &R = *Groups[i];
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// Start a single option entry.
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OS << "OPTION(";
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// The option string.
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OS << '"' << R.getValueAsString("Name") << '"';
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// The option identifier name.
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OS << ", "<< getOptionName(R);
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// The option kind.
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OS << ", Group";
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// The containing option group (if any).
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OS << ", ";
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if (const DefInit *DI = dynamic_cast<DefInit*>(R.getValueInit("Group")))
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OS << getOptionName(*DI->getDef());
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else
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OS << "INVALID";
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// The other option arguments (unused for groups).
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OS << ", INVALID, 0, 0";
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// The option help text.
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if (!dynamic_cast<UnsetInit*>(R.getValueInit("HelpText"))) {
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OS << ",\n";
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OS << " ";
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write_cstring(OS, R.getValueAsString("HelpText"));
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} else
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OS << ", 0";
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// The option meta-variable name (unused).
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OS << ", 0)\n";
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}
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OS << "\n";
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OS << "//////////\n";
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OS << "// Options\n\n";
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for (unsigned i = 0, e = Opts.size(); i != e; ++i) {
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const Record &R = *Opts[i];
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// Start a single option entry.
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OS << "OPTION(";
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// The option string.
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write_cstring(OS, R.getValueAsString("Name"));
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// The option identifier name.
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OS << ", "<< getOptionName(R);
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// The option kind.
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OS << ", " << R.getValueAsDef("Kind")->getValueAsString("Name");
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// The containing option group (if any).
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OS << ", ";
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if (const DefInit *DI = dynamic_cast<DefInit*>(R.getValueInit("Group")))
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OS << getOptionName(*DI->getDef());
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else
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OS << "INVALID";
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// The option alias (if any).
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OS << ", ";
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if (const DefInit *DI = dynamic_cast<DefInit*>(R.getValueInit("Alias")))
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OS << getOptionName(*DI->getDef());
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else
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OS << "INVALID";
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// The option flags.
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const ListInit *LI = R.getValueAsListInit("Flags");
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if (LI->empty()) {
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OS << ", 0";
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} else {
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OS << ", ";
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for (unsigned i = 0, e = LI->size(); i != e; ++i) {
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if (i)
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OS << " | ";
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OS << dynamic_cast<DefInit*>(LI->getElement(i))->getDef()->getName();
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}
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}
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// The option parameter field.
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OS << ", " << R.getValueAsInt("NumArgs");
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// The option help text.
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if (!dynamic_cast<UnsetInit*>(R.getValueInit("HelpText"))) {
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OS << ",\n";
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OS << " ";
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write_cstring(OS, R.getValueAsString("HelpText"));
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} else
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OS << ", 0";
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// The option meta-variable name.
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OS << ", ";
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if (!dynamic_cast<UnsetInit*>(R.getValueInit("MetaVarName")))
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write_cstring(OS, R.getValueAsString("MetaVarName"));
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else
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OS << "0";
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OS << ")\n";
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}
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}
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}
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