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-// Copyright 2007, 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.
-//
-// Author: wan@google.com (Zhanyong Wan)
-
-// Google Test - The Google C++ Testing Framework
-//
-// This file implements a universal value printer that can print a
-// value of any type T:
-//
-// void ::testing::internal::UniversalPrinter<T>::Print(value, ostream_ptr);
-//
-// It uses the << operator when possible, and prints the bytes in the
-// object otherwise. A user can override its behavior for a class
-// type Foo by defining either operator<<(::std::ostream&, const Foo&)
-// or void PrintTo(const Foo&, ::std::ostream*) in the namespace that
-// defines Foo.
-
-#include "gtest/gtest-printers.h"
-#include <ctype.h>
-#include <stdio.h>
-#include <cwchar>
-#include <ostream> // NOLINT
-#include <string>
-#include "gtest/internal/gtest-port.h"
-
-namespace testing {
-
-namespace {
-
-using ::std::ostream;
-
-// Prints a segment of bytes in the given object.
-GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_
-GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
-GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_
-void PrintByteSegmentInObjectTo(const unsigned char* obj_bytes, size_t start,
- size_t count, ostream* os) {
- char text[5] = "";
- for (size_t i = 0; i != count; i++) {
- const size_t j = start + i;
- if (i != 0) {
- // Organizes the bytes into groups of 2 for easy parsing by
- // human.
- if ((j % 2) == 0)
- *os << ' ';
- else
- *os << '-';
- }
- GTEST_SNPRINTF_(text, sizeof(text), "%02X", obj_bytes[j]);
- *os << text;
- }
-}
-
-// Prints the bytes in the given value to the given ostream.
-void PrintBytesInObjectToImpl(const unsigned char* obj_bytes, size_t count,
- ostream* os) {
- // Tells the user how big the object is.
- *os << count << "-byte object <";
-
- const size_t kThreshold = 132;
- const size_t kChunkSize = 64;
- // If the object size is bigger than kThreshold, we'll have to omit
- // some details by printing only the first and the last kChunkSize
- // bytes.
- // TODO(wan): let the user control the threshold using a flag.
- if (count < kThreshold) {
- PrintByteSegmentInObjectTo(obj_bytes, 0, count, os);
- } else {
- PrintByteSegmentInObjectTo(obj_bytes, 0, kChunkSize, os);
- *os << " ... ";
- // Rounds up to 2-byte boundary.
- const size_t resume_pos = (count - kChunkSize + 1)/2*2;
- PrintByteSegmentInObjectTo(obj_bytes, resume_pos, count - resume_pos, os);
- }
- *os << ">";
-}
-
-} // namespace
-
-namespace internal2 {
-
-// Delegates to PrintBytesInObjectToImpl() to print the bytes in the
-// given object. The delegation simplifies the implementation, which
-// uses the << operator and thus is easier done outside of the
-// ::testing::internal namespace, which contains a << operator that
-// sometimes conflicts with the one in STL.
-void PrintBytesInObjectTo(const unsigned char* obj_bytes, size_t count,
- ostream* os) {
- PrintBytesInObjectToImpl(obj_bytes, count, os);
-}
-
-} // namespace internal2
-
-namespace internal {
-
-// Depending on the value of a char (or wchar_t), we print it in one
-// of three formats:
-// - as is if it's a printable ASCII (e.g. 'a', '2', ' '),
-// - as a hexidecimal escape sequence (e.g. '\x7F'), or
-// - as a special escape sequence (e.g. '\r', '\n').
-enum CharFormat {
- kAsIs,
- kHexEscape,
- kSpecialEscape
-};
-
-// Returns true if c is a printable ASCII character. We test the
-// value of c directly instead of calling isprint(), which is buggy on
-// Windows Mobile.
-inline bool IsPrintableAscii(wchar_t c) {
- return 0x20 <= c && c <= 0x7E;
-}
-
-// Prints a wide or narrow char c as a character literal without the
-// quotes, escaping it when necessary; returns how c was formatted.
-// The template argument UnsignedChar is the unsigned version of Char,
-// which is the type of c.
-template <typename UnsignedChar, typename Char>
-static CharFormat PrintAsCharLiteralTo(Char c, ostream* os) {
- switch (static_cast<wchar_t>(c)) {
- case L'\0':
- *os << "\\0";
- break;
- case L'\'':
- *os << "\\'";
- break;
- case L'\\':
- *os << "\\\\";
- break;
- case L'\a':
- *os << "\\a";
- break;
- case L'\b':
- *os << "\\b";
- break;
- case L'\f':
- *os << "\\f";
- break;
- case L'\n':
- *os << "\\n";
- break;
- case L'\r':
- *os << "\\r";
- break;
- case L'\t':
- *os << "\\t";
- break;
- case L'\v':
- *os << "\\v";
- break;
- default:
- if (IsPrintableAscii(c)) {
- *os << static_cast<char>(c);
- return kAsIs;
- } else {
- *os << "\\x" + String::FormatHexInt(static_cast<UnsignedChar>(c));
- return kHexEscape;
- }
- }
- return kSpecialEscape;
-}
-
-// Prints a wchar_t c as if it's part of a string literal, escaping it when
-// necessary; returns how c was formatted.
-static CharFormat PrintAsStringLiteralTo(wchar_t c, ostream* os) {
- switch (c) {
- case L'\'':
- *os << "'";
- return kAsIs;
- case L'"':
- *os << "\\\"";
- return kSpecialEscape;
- default:
- return PrintAsCharLiteralTo<wchar_t>(c, os);
- }
-}
-
-// Prints a char c as if it's part of a string literal, escaping it when
-// necessary; returns how c was formatted.
-static CharFormat PrintAsStringLiteralTo(char c, ostream* os) {
- return PrintAsStringLiteralTo(
- static_cast<wchar_t>(static_cast<unsigned char>(c)), os);
-}
-
-// Prints a wide or narrow character c and its code. '\0' is printed
-// as "'\\0'", other unprintable characters are also properly escaped
-// using the standard C++ escape sequence. The template argument
-// UnsignedChar is the unsigned version of Char, which is the type of c.
-template <typename UnsignedChar, typename Char>
-void PrintCharAndCodeTo(Char c, ostream* os) {
- // First, print c as a literal in the most readable form we can find.
- *os << ((sizeof(c) > 1) ? "L'" : "'");
- const CharFormat format = PrintAsCharLiteralTo<UnsignedChar>(c, os);
- *os << "'";
-
- // To aid user debugging, we also print c's code in decimal, unless
- // it's 0 (in which case c was printed as '\\0', making the code
- // obvious).
- if (c == 0)
- return;
- *os << " (" << static_cast<int>(c);
-
- // For more convenience, we print c's code again in hexidecimal,
- // unless c was already printed in the form '\x##' or the code is in
- // [1, 9].
- if (format == kHexEscape || (1 <= c && c <= 9)) {
- // Do nothing.
- } else {
- *os << ", 0x" << String::FormatHexInt(static_cast<UnsignedChar>(c));
- }
- *os << ")";
-}
-
-void PrintTo(unsigned char c, ::std::ostream* os) {
- PrintCharAndCodeTo<unsigned char>(c, os);
-}
-void PrintTo(signed char c, ::std::ostream* os) {
- PrintCharAndCodeTo<unsigned char>(c, os);
-}
-
-// Prints a wchar_t as a symbol if it is printable or as its internal
-// code otherwise and also as its code. L'\0' is printed as "L'\\0'".
-void PrintTo(wchar_t wc, ostream* os) {
- PrintCharAndCodeTo<wchar_t>(wc, os);
-}
-
-// Prints the given array of characters to the ostream. CharType must be either
-// char or wchar_t.
-// The array starts at begin, the length is len, it may include '\0' characters
-// and may not be NUL-terminated.
-template <typename CharType>
-GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_
-GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
-GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_
-static void PrintCharsAsStringTo(
- const CharType* begin, size_t len, ostream* os) {
- const char* const kQuoteBegin = sizeof(CharType) == 1 ? "\"" : "L\"";
- *os << kQuoteBegin;
- bool is_previous_hex = false;
- for (size_t index = 0; index < len; ++index) {
- const CharType cur = begin[index];
- if (is_previous_hex && IsXDigit(cur)) {
- // Previous character is of '\x..' form and this character can be
- // interpreted as another hexadecimal digit in its number. Break string to
- // disambiguate.
- *os << "\" " << kQuoteBegin;
- }
- is_previous_hex = PrintAsStringLiteralTo(cur, os) == kHexEscape;
- }
- *os << "\"";
-}
-
-// Prints a (const) char/wchar_t array of 'len' elements, starting at address
-// 'begin'. CharType must be either char or wchar_t.
-template <typename CharType>
-GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_
-GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
-GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_
-static void UniversalPrintCharArray(
- const CharType* begin, size_t len, ostream* os) {
- // The code
- // const char kFoo[] = "foo";
- // generates an array of 4, not 3, elements, with the last one being '\0'.
- //
- // Therefore when printing a char array, we don't print the last element if
- // it's '\0', such that the output matches the string literal as it's
- // written in the source code.
- if (len > 0 && begin[len - 1] == '\0') {
- PrintCharsAsStringTo(begin, len - 1, os);
- return;
- }
-
- // If, however, the last element in the array is not '\0', e.g.
- // const char kFoo[] = { 'f', 'o', 'o' };
- // we must print the entire array. We also print a message to indicate
- // that the array is not NUL-terminated.
- PrintCharsAsStringTo(begin, len, os);
- *os << " (no terminating NUL)";
-}
-
-// Prints a (const) char array of 'len' elements, starting at address 'begin'.
-void UniversalPrintArray(const char* begin, size_t len, ostream* os) {
- UniversalPrintCharArray(begin, len, os);
-}
-
-// Prints a (const) wchar_t array of 'len' elements, starting at address
-// 'begin'.
-void UniversalPrintArray(const wchar_t* begin, size_t len, ostream* os) {
- UniversalPrintCharArray(begin, len, os);
-}
-
-// Prints the given C string to the ostream.
-void PrintTo(const char* s, ostream* os) {
- if (s == NULL) {
- *os << "NULL";
- } else {
- *os << ImplicitCast_<const void*>(s) << " pointing to ";
- PrintCharsAsStringTo(s, strlen(s), os);
- }
-}
-
-// MSVC compiler can be configured to define whar_t as a typedef
-// of unsigned short. Defining an overload for const wchar_t* in that case
-// would cause pointers to unsigned shorts be printed as wide strings,
-// possibly accessing more memory than intended and causing invalid
-// memory accesses. MSVC defines _NATIVE_WCHAR_T_DEFINED symbol when
-// wchar_t is implemented as a native type.
-#if !defined(_MSC_VER) || defined(_NATIVE_WCHAR_T_DEFINED)
-// Prints the given wide C string to the ostream.
-void PrintTo(const wchar_t* s, ostream* os) {
- if (s == NULL) {
- *os << "NULL";
- } else {
- *os << ImplicitCast_<const void*>(s) << " pointing to ";
- PrintCharsAsStringTo(s, std::wcslen(s), os);
- }
-}
-#endif // wchar_t is native
-
-// Prints a ::string object.
-#if GTEST_HAS_GLOBAL_STRING
-void PrintStringTo(const ::string& s, ostream* os) {
- PrintCharsAsStringTo(s.data(), s.size(), os);
-}
-#endif // GTEST_HAS_GLOBAL_STRING
-
-void PrintStringTo(const ::std::string& s, ostream* os) {
- PrintCharsAsStringTo(s.data(), s.size(), os);
-}
-
-// Prints a ::wstring object.
-#if GTEST_HAS_GLOBAL_WSTRING
-void PrintWideStringTo(const ::wstring& s, ostream* os) {
- PrintCharsAsStringTo(s.data(), s.size(), os);
-}
-#endif // GTEST_HAS_GLOBAL_WSTRING
-
-#if GTEST_HAS_STD_WSTRING
-void PrintWideStringTo(const ::std::wstring& s, ostream* os) {
- PrintCharsAsStringTo(s.data(), s.size(), os);
-}
-#endif // GTEST_HAS_STD_WSTRING
-
-} // namespace internal
-
-} // namespace testing
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