1 files changed, 157 insertions, 0 deletions
diff --git a/Source/cmCMakePolicyCommand.cxx b/Source/cmCMakePolicyCommand.cxx
new file mode 100644
index 0000000..07e0885
--- /dev/null
+++ b/Source/cmCMakePolicyCommand.cxx
@@ -0,0 +1,157 @@
+/*============================================================================
+  CMake - Cross Platform Makefile Generator
+  Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
+
+  Distributed under the OSI-approved BSD License (the "License");
+  see accompanying file Copyright.txt for details.
+
+  This software is distributed WITHOUT ANY WARRANTY; without even the
+  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+  See the License for more information.
+============================================================================*/
+#include "cmCMakePolicyCommand.h"
+
+#include "cmVersion.h"
+
+// cmCMakePolicyCommand
+bool cmCMakePolicyCommand::InitialPass(std::vector<std::string> const& args,
+                                       cmExecutionStatus&)
+{
+  if (args.size() < 1) {
+    this->SetError("requires at least one argument.");
+    return false;
+  }
+
+  if (args[0] == "SET") {
+    return this->HandleSetMode(args);
+  } else if (args[0] == "GET") {
+    return this->HandleGetMode(args);
+  } else if (args[0] == "PUSH") {
+    if (args.size() > 1) {
+      this->SetError("PUSH may not be given additional arguments.");
+      return false;
+    }
+    this->Makefile->PushPolicy();
+    return true;
+  } else if (args[0] == "POP") {
+    if (args.size() > 1) {
+      this->SetError("POP may not be given additional arguments.");
+      return false;
+    }
+    this->Makefile->PopPolicy();
+    return true;
+  } else if (args[0] == "VERSION") {
+    return this->HandleVersionMode(args);
+  }
+
+  std::ostringstream e;
+  e << "given unknown first argument \"" << args[0] << "\"";
+  this->SetError(e.str());
+  return false;
+}
+
+bool cmCMakePolicyCommand::HandleSetMode(std::vector<std::string> const& args)
+{
+  if (args.size() != 3) {
+    this->SetError("SET must be given exactly 2 additional arguments.");
+    return false;
+  }
+
+  cmPolicies::PolicyStatus status;
+  if (args[2] == "OLD") {
+    status = cmPolicies::OLD;
+  } else if (args[2] == "NEW") {
+    status = cmPolicies::NEW;
+  } else {
+    std::ostringstream e;
+    e << "SET given unrecognized policy status \"" << args[2] << "\"";
+    this->SetError(e.str());
+    return false;
+  }
+
+  if (!this->Makefile->SetPolicy(args[1].c_str(), status)) {
+    this->SetError("SET failed to set policy.");
+    return false;
+  }
+  if (args[1] == "CMP0001" &&
+      (status == cmPolicies::WARN || status == cmPolicies::OLD)) {
+    if (!(this->Makefile->GetState()->GetInitializedCacheValue(
+          "CMAKE_BACKWARDS_COMPATIBILITY"))) {
+      // Set it to 2.4 because that is the last version where the
+      // variable had meaning.
+      this->Makefile->AddCacheDefinition(
+        "CMAKE_BACKWARDS_COMPATIBILITY", "2.4",
+        "For backwards compatibility, what version of CMake "
+        "commands and "
+        "syntax should this version of CMake try to support.",
+        cmState::STRING);
+    }
+  }
+  return true;
+}
+
+bool cmCMakePolicyCommand::HandleGetMode(std::vector<std::string> const& args)
+{
+  if (args.size() != 3) {
+    this->SetError("GET must be given exactly 2 additional arguments.");
+    return false;
+  }
+
+  // Get arguments.
+  std::string const& id = args[1];
+  std::string const& var = args[2];
+
+  // Lookup the policy number.
+  cmPolicies::PolicyID pid;
+  if (!cmPolicies::GetPolicyID(id.c_str(), pid)) {
+    std::ostringstream e;
+    e << "GET given policy \"" << id << "\" which is not known to this "
+      << "version of CMake.";
+    this->SetError(e.str());
+    return false;
+  }
+
+  // Lookup the policy setting.
+  cmPolicies::PolicyStatus status = this->Makefile->GetPolicyStatus(pid);
+  switch (status) {
+    case cmPolicies::OLD:
+      // Report that the policy is set to OLD.
+      this->Makefile->AddDefinition(var, "OLD");
+      break;
+    case cmPolicies::WARN:
+      // Report that the policy is not set.
+      this->Makefile->AddDefinition(var, "");
+      break;
+    case cmPolicies::NEW:
+      // Report that the policy is set to NEW.
+      this->Makefile->AddDefinition(var, "NEW");
+      break;
+    case cmPolicies::REQUIRED_IF_USED:
+    case cmPolicies::REQUIRED_ALWAYS:
+      // The policy is required to be set before anything needs it.
+      {
+        std::ostringstream e;
+        e << cmPolicies::GetRequiredPolicyError(pid) << "\n"
+          << "The call to cmake_policy(GET " << id << " ...) at which this "
+          << "error appears requests the policy, and this version of CMake "
+          << "requires that the policy be set to NEW before it is checked.";
+        this->Makefile->IssueMessage(cmake::FATAL_ERROR, e.str());
+      }
+  }
+
+  return true;
+}
+
+bool cmCMakePolicyCommand::HandleVersionMode(
+  std::vector<std::string> const& args)
+{
+  if (args.size() <= 1) {
+    this->SetError("VERSION not given an argument");
+    return false;
+  } else if (args.size() >= 3) {
+    this->SetError("VERSION given too many arguments");
+    return false;
+  }
+  this->Makefile->SetPolicyVersion(args[1].c_str());
+  return true;
+}