1 files changed, 318 insertions, 0 deletions
diff --git a/Source/cmRulePlaceholderExpander.cxx b/Source/cmRulePlaceholderExpander.cxx
new file mode 100644
index 0000000..a71861a
--- /dev/null
+++ b/Source/cmRulePlaceholderExpander.cxx
@@ -0,0 +1,318 @@
+/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+   file Copyright.txt or https://cmake.org/licensing for details.  */
+#include "cmRulePlaceholderExpander.h"
+
+#include <ctype.h>
+#include <string.h>
+#include <utility>
+
+#include "cmOutputConverter.h"
+#include "cmSystemTools.h"
+
+cmRulePlaceholderExpander::cmRulePlaceholderExpander(
+  std::map<std::string, std::string> const& compilers,
+  std::map<std::string, std::string> const& variableMappings,
+  std::string const& compilerSysroot, std::string const& linkerSysroot)
+  : Compilers(compilers)
+  , VariableMappings(variableMappings)
+  , CompilerSysroot(compilerSysroot)
+  , LinkerSysroot(linkerSysroot)
+{
+}
+
+cmRulePlaceholderExpander::RuleVariables::RuleVariables()
+{
+  memset(this, 0, sizeof(*this));
+}
+
+std::string cmRulePlaceholderExpander::ExpandRuleVariable(
+  cmOutputConverter* outputConverter, std::string const& variable,
+  const RuleVariables& replaceValues)
+{
+  if (replaceValues.LinkFlags) {
+    if (variable == "LINK_FLAGS") {
+      return replaceValues.LinkFlags;
+    }
+  }
+  if (replaceValues.Manifests) {
+    if (variable == "MANIFESTS") {
+      return replaceValues.Manifests;
+    }
+  }
+  if (replaceValues.Flags) {
+    if (variable == "FLAGS") {
+      return replaceValues.Flags;
+    }
+  }
+
+  if (replaceValues.Source) {
+    if (variable == "SOURCE") {
+      return replaceValues.Source;
+    }
+  }
+  if (replaceValues.PreprocessedSource) {
+    if (variable == "PREPROCESSED_SOURCE") {
+      return replaceValues.PreprocessedSource;
+    }
+  }
+  if (replaceValues.AssemblySource) {
+    if (variable == "ASSEMBLY_SOURCE") {
+      return replaceValues.AssemblySource;
+    }
+  }
+  if (replaceValues.Object) {
+    if (variable == "OBJECT") {
+      return replaceValues.Object;
+    }
+  }
+  if (replaceValues.ObjectDir) {
+    if (variable == "OBJECT_DIR") {
+      return replaceValues.ObjectDir;
+    }
+  }
+  if (replaceValues.ObjectFileDir) {
+    if (variable == "OBJECT_FILE_DIR") {
+      return replaceValues.ObjectFileDir;
+    }
+  }
+  if (replaceValues.Objects) {
+    if (variable == "OBJECTS") {
+      return replaceValues.Objects;
+    }
+  }
+  if (replaceValues.ObjectsQuoted) {
+    if (variable == "OBJECTS_QUOTED") {
+      return replaceValues.ObjectsQuoted;
+    }
+  }
+  if (replaceValues.Defines && variable == "DEFINES") {
+    return replaceValues.Defines;
+  }
+  if (replaceValues.Includes && variable == "INCLUDES") {
+    return replaceValues.Includes;
+  }
+  if (replaceValues.TargetPDB) {
+    if (variable == "TARGET_PDB") {
+      return replaceValues.TargetPDB;
+    }
+  }
+  if (replaceValues.TargetCompilePDB) {
+    if (variable == "TARGET_COMPILE_PDB") {
+      return replaceValues.TargetCompilePDB;
+    }
+  }
+  if (replaceValues.DependencyFile) {
+    if (variable == "DEP_FILE") {
+      return replaceValues.DependencyFile;
+    }
+  }
+
+  if (replaceValues.Target) {
+    if (variable == "TARGET_QUOTED") {
+      std::string targetQuoted = replaceValues.Target;
+      if (!targetQuoted.empty() && targetQuoted[0] != '\"') {
+        targetQuoted = '\"';
+        targetQuoted += replaceValues.Target;
+        targetQuoted += '\"';
+      }
+      return targetQuoted;
+    }
+    if (variable == "TARGET_UNQUOTED") {
+      std::string unquoted = replaceValues.Target;
+      std::string::size_type sz = unquoted.size();
+      if (sz > 2 && unquoted[0] == '\"' && unquoted[sz - 1] == '\"') {
+        unquoted = unquoted.substr(1, sz - 2);
+      }
+      return unquoted;
+    }
+    if (replaceValues.LanguageCompileFlags) {
+      if (variable == "LANGUAGE_COMPILE_FLAGS") {
+        return replaceValues.LanguageCompileFlags;
+      }
+    }
+    if (replaceValues.Target) {
+      if (variable == "TARGET") {
+        return replaceValues.Target;
+      }
+    }
+    if (variable == "TARGET_IMPLIB") {
+      return this->TargetImpLib;
+    }
+    if (variable == "TARGET_VERSION_MAJOR") {
+      if (replaceValues.TargetVersionMajor) {
+        return replaceValues.TargetVersionMajor;
+      }
+      return "0";
+    }
+    if (variable == "TARGET_VERSION_MINOR") {
+      if (replaceValues.TargetVersionMinor) {
+        return replaceValues.TargetVersionMinor;
+      }
+      return "0";
+    }
+    if (replaceValues.Target) {
+      if (variable == "TARGET_BASE") {
+        // Strip the last extension off the target name.
+        std::string targetBase = replaceValues.Target;
+        std::string::size_type pos = targetBase.rfind('.');
+        if (pos != std::string::npos) {
+          return targetBase.substr(0, pos);
+        }
+        return targetBase;
+      }
+    }
+  }
+  if (variable == "TARGET_SONAME" || variable == "SONAME_FLAG" ||
+      variable == "TARGET_INSTALLNAME_DIR") {
+    // All these variables depend on TargetSOName
+    if (replaceValues.TargetSOName) {
+      if (variable == "TARGET_SONAME") {
+        return replaceValues.TargetSOName;
+      }
+      if (variable == "SONAME_FLAG" && replaceValues.SONameFlag) {
+        return replaceValues.SONameFlag;
+      }
+      if (replaceValues.TargetInstallNameDir &&
+          variable == "TARGET_INSTALLNAME_DIR") {
+        return replaceValues.TargetInstallNameDir;
+      }
+    }
+    return "";
+  }
+  if (replaceValues.LinkLibraries) {
+    if (variable == "LINK_LIBRARIES") {
+      return replaceValues.LinkLibraries;
+    }
+  }
+  if (replaceValues.Language) {
+    if (variable == "LANGUAGE") {
+      return replaceValues.Language;
+    }
+  }
+  if (replaceValues.CMTargetName) {
+    if (variable == "TARGET_NAME") {
+      return replaceValues.CMTargetName;
+    }
+  }
+  if (replaceValues.CMTargetType) {
+    if (variable == "TARGET_TYPE") {
+      return replaceValues.CMTargetType;
+    }
+  }
+  if (replaceValues.Output) {
+    if (variable == "OUTPUT") {
+      return replaceValues.Output;
+    }
+  }
+  if (variable == "CMAKE_COMMAND") {
+    return outputConverter->ConvertToOutputFormat(
+      cmSystemTools::CollapseFullPath(cmSystemTools::GetCMakeCommand()),
+      cmOutputConverter::SHELL);
+  }
+
+  std::map<std::string, std::string>::iterator compIt =
+    this->Compilers.find(variable);
+
+  if (compIt != this->Compilers.end()) {
+    std::string ret = outputConverter->ConvertToOutputForExisting(
+      this->VariableMappings["CMAKE_" + compIt->second + "_COMPILER"]);
+    std::string const& compilerArg1 =
+      this->VariableMappings["CMAKE_" + compIt->second + "_COMPILER_ARG1"];
+    std::string const& compilerTarget =
+      this->VariableMappings["CMAKE_" + compIt->second + "_COMPILER_TARGET"];
+    std::string const& compilerOptionTarget =
+      this->VariableMappings["CMAKE_" + compIt->second +
+                             "_COMPILE_OPTIONS_TARGET"];
+    std::string const& compilerExternalToolchain =
+      this->VariableMappings["CMAKE_" + compIt->second +
+                             "_COMPILER_EXTERNAL_TOOLCHAIN"];
+    std::string const& compilerOptionExternalToolchain =
+      this->VariableMappings["CMAKE_" + compIt->second +
+                             "_COMPILE_OPTIONS_EXTERNAL_TOOLCHAIN"];
+    std::string const& compilerOptionSysroot =
+      this->VariableMappings["CMAKE_" + compIt->second +
+                             "_COMPILE_OPTIONS_SYSROOT"];
+
+    // if there is a required first argument to the compiler add it
+    // to the compiler string
+    if (!compilerArg1.empty()) {
+      ret += " ";
+      ret += compilerArg1;
+    }
+    if (!compilerTarget.empty() && !compilerOptionTarget.empty()) {
+      ret += " ";
+      ret += compilerOptionTarget;
+      ret += compilerTarget;
+    }
+    if (!compilerExternalToolchain.empty() &&
+        !compilerOptionExternalToolchain.empty()) {
+      ret += " ";
+      ret += compilerOptionExternalToolchain;
+      ret += outputConverter->EscapeForShell(compilerExternalToolchain, true);
+    }
+    std::string sysroot;
+    // Some platforms may use separate sysroots for compiling and linking.
+    // If we detect link flags, then we pass the link sysroot instead.
+    // FIXME: Use a more robust way to detect link line expansion.
+    if (replaceValues.LinkFlags) {
+      sysroot = this->LinkerSysroot;
+    } else {
+      sysroot = this->CompilerSysroot;
+    }
+    if (!sysroot.empty() && !compilerOptionSysroot.empty()) {
+      ret += " ";
+      ret += compilerOptionSysroot;
+      ret += outputConverter->EscapeForShell(sysroot, true);
+    }
+    return ret;
+  }
+
+  std::map<std::string, std::string>::iterator mapIt =
+    this->VariableMappings.find(variable);
+  if (mapIt != this->VariableMappings.end()) {
+    if (variable.find("_FLAG") == std::string::npos) {
+      return outputConverter->ConvertToOutputForExisting(mapIt->second);
+    }
+    return mapIt->second;
+  }
+  return variable;
+}
+
+void cmRulePlaceholderExpander::ExpandRuleVariables(
+  cmOutputConverter* outputConverter, std::string& s,
+  const RuleVariables& replaceValues)
+{
+  std::string::size_type start = s.find('<');
+  // no variables to expand
+  if (start == std::string::npos) {
+    return;
+  }
+  std::string::size_type pos = 0;
+  std::string expandedInput;
+  while (start != std::string::npos && start < s.size() - 2) {
+    std::string::size_type end = s.find('>', start);
+    // if we find a < with no > we are done
+    if (end == std::string::npos) {
+      return;
+    }
+    char c = s[start + 1];
+    // if the next char after the < is not A-Za-z then
+    // skip it and try to find the next < in the string
+    if (!isalpha(c)) {
+      start = s.find('<', start + 1);
+    } else {
+      // extract the var
+      std::string var = s.substr(start + 1, end - start - 1);
+      std::string replace =
+        this->ExpandRuleVariable(outputConverter, var, replaceValues);
+      expandedInput += s.substr(pos, start - pos);
+      expandedInput += replace;
+      // move to next one
+      start = s.find('<', start + var.size() + 2);
+      pos = end + 1;
+    }
+  }
+  // add the rest of the input
+  expandedInput += s.substr(pos, s.size() - pos);
+  s = expandedInput;
+}