| // 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: |
| // |
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| // 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. |
| |
| // Google Test - The Google C++ Testing and Mocking 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 <stdio.h> |
| #include <cctype> |
| #include <cwchar> |
| #include <ostream> // NOLINT |
| #include <string> |
| #include "gtest/internal/gtest-port.h" |
| #include "src/gtest-internal-inl.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_HWADDRESS_ |
| 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. |
| 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 hexadecimal 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) { |
| wchar_t w_c = static_cast<wchar_t>(c); |
| switch (w_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(w_c)) { |
| *os << static_cast<char>(c); |
| return kAsIs; |
| } else { |
| ostream::fmtflags flags = os->flags(); |
| *os << "\\x" << std::hex << std::uppercase |
| << static_cast<int>(static_cast<UnsignedChar>(c)); |
| os->flags(flags); |
| 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 hexadecimal, |
| // 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<int>(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_HWADDRESS_ |
| GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_ static CharFormat |
| PrintCharsAsStringTo(const CharType *begin, size_t len, ostream *os) { |
| const char *const kQuoteBegin = sizeof(CharType) == 1 ? "\"" : "L\""; |
| *os << kQuoteBegin; |
| bool is_previous_hex = false; |
| CharFormat print_format = kAsIs; |
| 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; |
| // Remember if any characters required hex escaping. |
| if (is_previous_hex) { |
| print_format = kHexEscape; |
| } |
| } |
| *os << "\""; |
| return print_format; |
| } |
| |
| // 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_HWADDRESS_ |
| 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 == nullptr) { |
| *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 == nullptr) { |
| *os << "NULL"; |
| } else { |
| *os << ImplicitCast_<const void *>(s) << " pointing to "; |
| PrintCharsAsStringTo(s, wcslen(s), os); |
| } |
| } |
| #endif // wchar_t is native |
| |
| namespace { |
| |
| bool ContainsUnprintableControlCodes(const char *str, size_t length) { |
| const unsigned char *s = reinterpret_cast<const unsigned char *>(str); |
| |
| for (size_t i = 0; i < length; i++) { |
| unsigned char ch = *s++; |
| if (std::iscntrl(ch)) { |
| switch (ch) { |
| case '\t': |
| case '\n': |
| case '\r': break; |
| default: return true; |
| } |
| } |
| } |
| return false; |
| } |
| |
| bool IsUTF8TrailByte(unsigned char t) { return 0x80 <= t && t <= 0xbf; } |
| |
| bool IsValidUTF8(const char *str, size_t length) { |
| const unsigned char *s = reinterpret_cast<const unsigned char *>(str); |
| |
| for (size_t i = 0; i < length;) { |
| unsigned char lead = s[i++]; |
| |
| if (lead <= 0x7f) { |
| continue; // single-byte character (ASCII) 0..7F |
| } |
| if (lead < 0xc2) { |
| return false; // trail byte or non-shortest form |
| } else if (lead <= 0xdf && (i + 1) <= length && IsUTF8TrailByte(s[i])) { |
| ++i; // 2-byte character |
| } else if (0xe0 <= lead && lead <= 0xef && (i + 2) <= length && |
| IsUTF8TrailByte(s[i]) && IsUTF8TrailByte(s[i + 1]) && |
| // check for non-shortest form and surrogate |
| (lead != 0xe0 || s[i] >= 0xa0) && |
| (lead != 0xed || s[i] < 0xa0)) { |
| i += 2; // 3-byte character |
| } else if (0xf0 <= lead && lead <= 0xf4 && (i + 3) <= length && |
| IsUTF8TrailByte(s[i]) && IsUTF8TrailByte(s[i + 1]) && |
| IsUTF8TrailByte(s[i + 2]) && |
| // check for non-shortest form |
| (lead != 0xf0 || s[i] >= 0x90) && |
| (lead != 0xf4 || s[i] < 0x90)) { |
| i += 3; // 4-byte character |
| } else { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| void ConditionalPrintAsText(const char *str, size_t length, ostream *os) { |
| if (!ContainsUnprintableControlCodes(str, length) && |
| IsValidUTF8(str, length)) { |
| *os << "\n As Text: \"" << str << "\""; |
| } |
| } |
| |
| } // anonymous namespace |
| |
| void PrintStringTo(const ::std::string &s, ostream *os) { |
| if (PrintCharsAsStringTo(s.data(), s.size(), os) == kHexEscape) { |
| if (GTEST_FLAG(print_utf8)) { |
| ConditionalPrintAsText(s.data(), s.size(), os); |
| } |
| } |
| } |
| |
| #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 |