THRIFT-925.-cpp-Add-_VALUES_TO_NAMES-enum-map.modified.patch

From 0236c4cf9b61787413090365a6e42b29aadcb02d Mon Sep 17 00:00:00 2001
From: David Reiss <dreiss@facebook.com>
Date: Sun, 12 Sep 2010 21:30:40 -0700
Subject: [PATCH 20/50] THRIFT-925. cpp: Add _VALUES_TO_NAMES enum map

---
 compiler/cpp/src/generate/t_cpp_generator.cc |   85 +++++++++++++++++++-------
 lib/cpp/src/Thrift.h                         |   29 +++++++++
 2 files changed, 91 insertions(+), 23 deletions(-)

diff --git a/compiler/cpp/src/generate/t_cpp_generator.cc b/compiler/cpp/src/generate/t_cpp_generator.cc
index 7c7863a..55cb4ca 100644
--- a/compiler/cpp/src/generate/t_cpp_generator.cc
+++ b/compiler/cpp/src/generate/t_cpp_generator.cc
@@ -488,6 +504,32 @@ void t_cpp_generator::generate_enum(t_enum* tenum) {
 
   f_types_ << endl;
 
+  /**
+     Generate a character array of enum names for debugging purposes.
+  */
+  if (!gen_pure_enums_) {
+    prefix = tenum->get_name() + "::";
+  }
+
+  f_types_impl_ <<
+    indent() << "int _k" << tenum->get_name() << "Values[] =";
+  generate_enum_constant_list(f_types_impl_, constants, prefix.c_str(), "", false);
+
+  f_types_impl_ <<
+    indent() << "const char* _k" << tenum->get_name() << "Names[] =";
+  generate_enum_constant_list(f_types_impl_, constants, "\"", "\"", false);
+
+  f_types_ <<
+    indent() << "extern const std::map<int, const char*> _" <<
+    tenum->get_name() << "_VALUES_TO_NAMES;" << endl << endl;
+
+  f_types_impl_ <<
+    indent() << "const std::map<int, const char*> _" << tenum->get_name() <<
+    "_VALUES_TO_NAMES(::apache::thrift::TEnumIterator(" << constants.size() <<
+    ", _k" << tenum->get_name() << "Values" <<
+    ", _k" << tenum->get_name() << "Names), " <<
+    "::apache::thrift::TEnumIterator(-1, NULL, NULL));" << endl << endl;
+
   generate_local_reflection(f_types_, tenum, false);
   generate_local_reflection(f_types_impl_, tenum, true);
 }
diff --git a/lib/cpp/src/Thrift.h b/lib/cpp/src/Thrift.h
index a8bf2a8..cf766f2 100644
--- a/lib/cpp/src/Thrift.h
+++ b/lib/cpp/src/Thrift.h
@@ -42,6 +43,34 @@
 
 namespace apache { namespace thrift {
 
+class TEnumIterator {
+ public:
+  TEnumIterator(int n,
+                int* enums,
+                const char** names) :
+      ii_(0), n_(n), enums_(enums), names_(names) {
+  }
+
+  int operator ++() {
+    return ++ii_;
+  }
+
+  bool operator !=(const TEnumIterator& end) {
+    assert(end.n_ == -1);
+    return (ii_ != n_);
+  }
+
+  std::pair<int, const char*> operator*() const {
+    return std::make_pair(enums_[ii_], names_[ii_]);
+  }
+
+ private:
+  int ii_;
+  const int n_;
+  int* enums_;
+  const char** names_;
+};
+
 class TOutput {
  public:
   TOutput() : f_(&errorTimeWrapper) {}
-- 
1.7.0.4
assert