// Copyright 2005, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// 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
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Authors: wan@google.com (Zhanyong Wan), eefacm@gmail.com (Sean Mcafee)
//
// The Google C++ Testing Framework (Google Test)
//
// This header file declares the String class and functions used internally by
// Google Test. They are subject to change without notice. They should not used
// by code external to Google Test.
//
// This header file is #included by <gtest/internal/gtest-internal.h>.
// It should not be #included by other files.
#ifndef GTEST_INCLUDE_GTEST_INTERNAL_GTEST_STRING_H_
#define GTEST_INCLUDE_GTEST_INTERNAL_GTEST_STRING_H_
#ifdef __BORLANDC__
// string.h is not guaranteed to provide strcpy on C++ Builder.
# include <mem.h>
#endif
#include <string.h>
#include "gtest/internal/gtest-port.h"
#include <string>
namespace testing {
namespace internal {
// String - a UTF-8 string class.
//
// For historic reasons, we don't use std::string.
//
// TODO(wan@google.com): replace this class with std::string or
// implement it in terms of the latter.
//
// Note that String can represent both NULL and the empty string,
// while std::string cannot represent NULL.
//
// NULL and the empty string are considered different. NULL is less
// than anything (including the empty string) except itself.
//
// This class only provides minimum functionality necessary for
// implementing Google Test. We do not intend to implement a full-fledged
// string class here.
//
// Since the purpose of this class is to provide a substitute for
// std::string on platforms where it cannot be used, we define a copy
// constructor and assignment operators such that we don't need
// conditional compilation in a lot of places.
//
// In order to make the representation efficient, the d'tor of String
// is not virtual. Therefore DO NOT INHERIT FROM String.
class GTEST_API_ String {
public:
// Static utility methods
// Returns the input enclosed in double quotes if it's not NULL;
// otherwise returns "(null)". For example, "\"Hello\"" is returned
// for input "Hello".
//
// This is useful for printing a C string in the syntax of a literal.
//
// Known issue: escape sequences are not handled yet.
static String ShowCStringQuoted(const char* c_str);
// Clones a 0-terminated C string, allocating memory using new. The
// caller is responsible for deleting the return value using
// delete[]. Returns the cloned string, or NULL if the input is
// NULL.
//
// This is different from strdup() in string.h, which allocates
// memory using malloc().
static const char* CloneCString(const char* c_str);
#if GTEST_OS_WINDOWS_MOBILE
// Windows CE does not have the 'ANSI' versions of Win32 APIs. To be
// able to pass strings to Win32 APIs on CE we need to convert them
// to 'Unicode', UTF-16.
// Creates a UTF-16 wide string from the given ANSI string, allocating
// memory using new. The caller is responsible for deleting the return
// value using delete[]. Returns the wide string, or NULL if the
// input is NULL.
//
// The wide string is created using the ANSI codepage (CP_ACP) to
// match the behaviour of the ANSI versions of Win32 calls and the
// C runtime.
static LPCWSTR AnsiToUtf16(const char* c_str);
// Creates an ANSI string from the given wide string, allocating
// memory using new. The caller is responsible for deleting the return
// value using delete[]. Returns the ANSI string, or NULL if the
// input is NULL.
//
// The returned string is created using the ANSI codepage (CP_ACP) to
// match the behaviour of the ANSI versions of Win32 calls and the
// C runtime.
static const char* Utf16ToAnsi(LPCWSTR utf16_str);
#endif
// Compares two C strings. Returns true iff they have the same content.
//
// Unlike strcmp(), this function can handle NULL argument(s). A
// NULL C string is considered different to any non-NULL C string,
// including the empty string.
static bool CStringEquals(const char* lhs, const char* rhs);
// Converts a wide C string to a String using the UTF-8 encoding.
// NULL will be converted to "(null)". If an error occurred during
// the conversion, "(failed to convert from wide string)" is
// returned.
static String ShowWideCString(const wchar_t* wide_c_str);
// Similar to ShowWideCString(), except that this function encloses
// the converted string in double quotes.
static String ShowWideCStringQuoted(const wchar_t* wide_c_str);
// Compares two wide C strings. Returns true iff they have the same
// content.
//
// Unlike wcscmp(), this function can handle NULL argument(s). A
// NULL C string is considered different to any non-NULL C string,
// including the empty string.
static bool WideCStringEquals(const wchar_t* lhs, const wchar_t* rhs);
// Compares two C strings, ignoring case. Returns true iff they
// have the same content.
//
// Unlike strcasecmp(), this function can handle NULL argument(s).
// A NULL C string is considered different to any non-NULL C string,
// including the empty string.
static bool CaseInsensitiveCStringEquals(const char* lhs,
const char* rhs);
// Compares two wide C strings, ignoring case. Returns true iff they
// have the same content.
//
// Unlike wcscasecmp(), this function can handle NULL argument(s).
// A NULL C string is considered different to any non-NULL wide C string,
// including the empty string.
// NB: The implementations on different platforms slightly differ.
// On windows, this method uses _wcsicmp which compares according to LC_CTYPE
// environment variable. On GNU platform this method uses wcscasecmp
// which compares according to LC_CTYPE category of the current locale.
// On MacOS X, it uses towlower, which also uses LC_CTYPE category of the
// current locale.
static bool CaseInsensitiveWideCStringEquals(const wchar_t* lhs,
const wchar_t* rhs);
// Formats a list of arguments to a String, using the same format
// spec string as for printf.
//
// We do not use the StringPrintf class as it is not universally
// available.
//
// The result is limited to 4096 characters (including the tailing
// 0). If 4096 characters are not enough to format the input,
// "<buffer exceeded>" is returned.
static String Format(const char* format, ...);
// C'tors
// The default c'tor constructs a NULL string.
String()
igmp.rar_class_utf-8
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