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// Copyright 2008, Google Inc.

// All rights reserved.

//

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// modification, are permitted provided that the following conditions are

// met:

//

//     * Redistributions of source code must retain the above copyright

// notice, this list of conditions and the following disclaimer.

//     * Redistributions in binary form must reproduce the above

// copyright notice, this list of conditions and the following disclaimer

// in the documentation and/or other materials provided with the

// distribution.

//     * Neither the name of Google Inc. nor the names of its

// contributors may be used to endorse or promote products derived from

// this software without specific prior written permission.

//

// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

//

// Author: wan@google.com (Zhanyong Wan)

#include "gmock/gmock.h"

#include "gmock/internal/gmock-port.h"

namespace testing {

// TODO(wan@google.com): support using environment variables to

// control the flag values, like what Google Test does.

GMOCK_DEFINE_bool_(catch_leaked_mocks, true,

                   "true iff Google Mock should report leaked mock objects "

                   "as failures.");

GMOCK_DEFINE_string_(verbose, internal::kWarningVerbosity,

                     "Controls how verbose Google Mock's output is."

                     "  Valid values:\n"

                     "  info    - prints all messages.\n"

                     "  warning - prints warnings and errors.\n"

                     "  error   - prints errors only.");

namespace internal {

// Parses a string as a command line flag.  The string should have the

// format "--gmock_flag=value".  When def_optional is true, the

// "=value" part can be omitted.

//

// Returns the value of the flag, or NULL if the parsing failed.

static const char* ParseGoogleMockFlagValue(const char* str,

                                            const char* flag,

                                            bool def_optional) {

  // str and flag must not be NULL.

  if (str == NULL || flag == NULL) return NULL;

  // The flag must start with "--gmock_".

  const std::string flag_str = std::string("--gmock_") + flag;

  const size_t flag_len = flag_str.length();

  if (strncmp(str, flag_str.c_str(), flag_len) != 0) return NULL;

  // Skips the flag name.

  const char* flag_end = str + flag_len;

  // When def_optional is true, it's OK to not have a "=value" part.

  if (def_optional && (flag_end[0] == '\0')) {

    return flag_end;

  }

  // If def_optional is true and there are more characters after the

  // flag name, or if def_optional is false, there must be a '=' after

  // the flag name.

  if (flag_end[0] != '=') return NULL;

  // Returns the string after "=".

  return flag_end + 1;

}

// Parses a string for a Google Mock bool flag, in the form of

// "--gmock_flag=value".

//

// On success, stores the value of the flag in *value, and returns

// true.  On failure, returns false without changing *value.

static bool ParseGoogleMockBoolFlag(const char* str, const char* flag,

                                    bool* value) {

  // Gets the value of the flag as a string.

  const char* const value_str = ParseGoogleMockFlagValue(str, flag, true);

  // Aborts if the parsing failed.

  if (value_str == NULL) return false;

  // Converts the string value to a bool.

  *value = !(*value_str == '0' || *value_str == 'f' || *value_str == 'F');

  return true;

}

// Parses a string for a Google Mock string flag, in the form of

// "--gmock_flag=value".

//

// On success, stores the value of the flag in *value, and returns

// true.  On failure, returns false without changing *value.

template <typename String>

static bool ParseGoogleMockStringFlag(const char* str, const char* flag,

                                      String* value) {

  // Gets the value of the flag as a string.

  const char* const value_str = ParseGoogleMockFlagValue(str, flag, false);

  // Aborts if the parsing failed.

  if (value_str == NULL) return false;

  // Sets *value to the value of the flag.

  *value = value_str;

  return true;

}

// The internal implementation of InitGoogleMock().

//

// The type parameter CharType can be instantiated to either char or

// wchar_t.

template <typename CharType>

void InitGoogleMockImpl(int* argc, CharType** argv) {

  // Makes sure Google Test is initialized.  InitGoogleTest() is

  // idempotent, so it's fine if the user has already called it.

  InitGoogleTest(argc, argv);

  if (*argc <= 0) return;

  for (int i = 1; i != *argc; i++) {

    const std::string arg_string = StreamableToString(argv[i]);

    const char* const arg = arg_string.c_str();

    // Do we see a Google Mock flag?

    if (ParseGoogleMockBoolFlag(arg, "catch_leaked_mocks",

                                &GMOCK_FLAG(catch_leaked_mocks)) ||

        ParseGoogleMockStringFlag(arg, "verbose", &GMOCK_FLAG(verbose))) {

      // Yes.  Shift the remainder of the argv list left by one.  Note

      // that argv has (*argc + 1) elements, the last one always being

      // NULL.  The following loop moves the trailing NULL element as

      // well.

      for (int j = i; j != *argc; j++) {

        argv[j] = argv[j + 1];

      }

      // Decrements the argument count.

      (*argc)--;

      // We also need to decrement the iterator as we just removed

      // an element.

      i--;

    }

  }

}

}  // namespace internal

// Initializes Google Mock.  This must be called before running the

// tests.  In particular, it parses a command line for the flags that

// Google Mock recognizes.  Whenever a Google Mock flag is seen, it is

// removed from argv, and *argc is decremented.

//

// No value is returned.  Instead, the Google Mock flag variables are

// updated.

//

// Since Google Test is needed for Google Mock to work, this function

// also initializes Google Test and parses its flags, if that hasn't

// been done.

GTEST_API_ void InitGoogleMock(int* argc, char** argv) {

  internal::InitGoogleMockImpl(argc, argv);

}

// This overloaded version can be used in Windows programs compiled in

// UNICODE mode.

GTEST_API_ void InitGoogleMock(int* argc, wchar_t** argv) {

  internal::InitGoogleMockImpl(argc, argv);

}

}  // namespace testing