clang/lib/Driver/OptionUtils.cpp

   1 //===--- OptionUtils.cpp - Utilities for command line arguments -----------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "clang/Basic/Diagnostic.h"
  10 #include "clang/Basic/DiagnosticDriver.h"
  11 #include "clang/Driver/OptionUtils.h"
  12 #include "llvm/Option/ArgList.h"
  13
  14 using namespace clang;
  15 using namespace llvm::opt;
  16
  17 namespace {
  18 template <typename IntTy>
  19 IntTy getLastArgIntValueImpl(const ArgList &Args, OptSpecifier Id,
  20                              IntTy Default, DiagnosticsEngine *Diags,
  21                              unsigned Base) {
  22   IntTy Res = Default;
  23   if (Arg *A = Args.getLastArg(Id)) {
  24     if (StringRef(A->getValue()).getAsInteger(Base, Res)) {
  25       if (Diags)
  26         Diags->Report(diag::err_drv_invalid_int_value)
  27             << A->getAsString(Args) << A->getValue();
  28     }
  29   }
  30   return Res;
  31 }
  32 } // namespace
  33
  34 namespace clang {
  35
  36 int getLastArgIntValue(const ArgList &Args, OptSpecifier Id, int Default,
  37                        DiagnosticsEngine *Diags, unsigned Base) {
  38   return getLastArgIntValueImpl<int>(Args, Id, Default, Diags, Base);
  39 }
  40
  41 uint64_t getLastArgUInt64Value(const ArgList &Args, OptSpecifier Id,
  42                                uint64_t Default, DiagnosticsEngine *Diags,
  43                                unsigned Base) {
  44   return getLastArgIntValueImpl<uint64_t>(Args, Id, Default, Diags, Base);
  45 }
  46
  47 } // namespace clang