1 files changed, 163 insertions, 0 deletions
diff --git a/Source/cmLoadCacheCommand.cxx b/Source/cmLoadCacheCommand.cxx
new file mode 100644
index 0000000..ea84877
--- /dev/null
+++ b/Source/cmLoadCacheCommand.cxx
@@ -0,0 +1,163 @@
+/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+   file Copyright.txt or https://cmake.org/licensing for details.  */
+#include "cmLoadCacheCommand.h"
+
+#include <cmsys/FStream.hxx>
+
+#include "cmMakefile.h"
+#include "cmStateTypes.h"
+#include "cmSystemTools.h"
+#include "cmake.h"
+
+class cmExecutionStatus;
+
+// cmLoadCacheCommand
+bool cmLoadCacheCommand::InitialPass(std::vector<std::string> const& args,
+                                     cmExecutionStatus&)
+{
+  if (args.empty()) {
+    this->SetError("called with wrong number of arguments.");
+  }
+
+  if (args.size() >= 2 && args[1] == "READ_WITH_PREFIX") {
+    return this->ReadWithPrefix(args);
+  }
+
+  // Cache entries to be excluded from the import list.
+  // If this set is empty, all cache entries are brought in
+  // and they can not be overridden.
+  bool excludeFiles = false;
+  unsigned int i;
+  std::set<std::string> excludes;
+
+  for (i = 0; i < args.size(); i++) {
+    if (excludeFiles) {
+      excludes.insert(args[i]);
+    }
+    if (args[i] == "EXCLUDE") {
+      excludeFiles = true;
+    }
+    if (excludeFiles && (args[i] == "INCLUDE_INTERNALS")) {
+      break;
+    }
+  }
+
+  // Internal cache entries to be imported.
+  // If this set is empty, no internal cache entries are
+  // brought in.
+  bool includeFiles = false;
+  std::set<std::string> includes;
+
+  for (i = 0; i < args.size(); i++) {
+    if (includeFiles) {
+      includes.insert(args[i]);
+    }
+    if (args[i] == "INCLUDE_INTERNALS") {
+      includeFiles = true;
+    }
+    if (includeFiles && (args[i] == "EXCLUDE")) {
+      break;
+    }
+  }
+
+  // Loop over each build directory listed in the arguments.  Each
+  // directory has a cache file.
+  for (i = 0; i < args.size(); i++) {
+    if ((args[i] == "EXCLUDE") || (args[i] == "INCLUDE_INTERNALS")) {
+      break;
+    }
+    this->Makefile->GetCMakeInstance()->LoadCache(args[i], false, excludes,
+                                                  includes);
+  }
+
+  return true;
+}
+
+bool cmLoadCacheCommand::ReadWithPrefix(std::vector<std::string> const& args)
+{
+  // Make sure we have a prefix.
+  if (args.size() < 3) {
+    this->SetError("READ_WITH_PREFIX form must specify a prefix.");
+    return false;
+  }
+
+  // Make sure the cache file exists.
+  std::string cacheFile = args[0] + "/CMakeCache.txt";
+  if (!cmSystemTools::FileExists(cacheFile.c_str())) {
+    std::string e = "Cannot load cache file from " + cacheFile;
+    this->SetError(e);
+    return false;
+  }
+
+  // Prepare the table of variables to read.
+  this->Prefix = args[2];
+  this->VariablesToRead.insert(args.begin() + 3, args.end());
+
+  // Read the cache file.
+  cmsys::ifstream fin(cacheFile.c_str());
+
+  // This is a big hack read loop to overcome a buggy ifstream
+  // implementation on HP-UX.  This should work on all platforms even
+  // for small buffer sizes.
+  const int bufferSize = 4096;
+  char buffer[bufferSize];
+  std::string line;
+  while (fin) {
+    // Read a block of the file.
+    fin.read(buffer, bufferSize);
+    if (fin.gcount()) {
+      // Parse for newlines directly.
+      const char* i = buffer;
+      const char* end = buffer + fin.gcount();
+      while (i != end) {
+        const char* begin = i;
+        while (i != end && *i != '\n') {
+          ++i;
+        }
+        if (i == begin || *(i - 1) != '\r') {
+          // Include this portion of the line.
+          line += std::string(begin, i - begin);
+        } else {
+          // Include this portion of the line.
+          // Don't include the \r in a \r\n pair.
+          line += std::string(begin, i - 1 - begin);
+        }
+        if (i != end) {
+          // Completed a line.
+          this->CheckLine(line.c_str());
+          line = "";
+
+          // Skip the newline character.
+          ++i;
+        }
+      }
+    }
+  }
+  if (!line.empty()) {
+    // Partial last line.
+    this->CheckLine(line.c_str());
+  }
+
+  return true;
+}
+
+void cmLoadCacheCommand::CheckLine(const char* line)
+{
+  // Check one line of the cache file.
+  std::string var;
+  std::string value;
+  cmStateEnums::CacheEntryType type = cmStateEnums::UNINITIALIZED;
+  if (cmake::ParseCacheEntry(line, var, value, type)) {
+    // Found a real entry.  See if this one was requested.
+    if (this->VariablesToRead.find(var) != this->VariablesToRead.end()) {
+      // This was requested.  Set this variable locally with the given
+      // prefix.
+      var = this->Prefix + var;
+      if (!value.empty()) {
+        this->Makefile->AddDefinition(var, value.c_str());
+      } else {
+        this->Makefile->RemoveDefinition(var);
+      }
+    }
+  }
+}