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29
30// The Google C++ Testing and Mocking Framework (Google Test)
31//
32// This header file declares the String class and functions used internally by
33// Google Test. They are subject to change without notice. They should not used
34// by code external to Google Test.
35//
36// This header file is #included by gtest-internal.h.
37// It should not be #included by other files.
38
39// IWYU pragma: private, include "gtest/gtest.h"
40// IWYU pragma: friend gtest/.*
41// IWYU pragma: friend gmock/.*
42
43#ifndef GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_STRING_H_
44#define GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_STRING_H_
45
46#ifdef __BORLANDC__
47// string.h is not guaranteed to provide strcpy on C++ Builder.
48#include <mem.h>
49#endif
50
51#include <string.h>
52
53#include <cstdint>
54#include <sstream>
55#include <string>
56
57#include "gtest/internal/gtest-port.h"
58
59namespace testing {
60namespace internal {
61
62// String - an abstract class holding static string utilities.
63class GTEST_API_ String {
64 public:
65 // Static utility methods
66
67 // Clones a 0-terminated C string, allocating memory using new. The
68 // caller is responsible for deleting the return value using
69 // delete[]. Returns the cloned string, or NULL if the input is
70 // NULL.
71 //
72 // This is different from strdup() in string.h, which allocates
73 // memory using malloc().
74 static const char* CloneCString(const char* c_str);
75
76#ifdef GTEST_OS_WINDOWS_MOBILE
77 // Windows CE does not have the 'ANSI' versions of Win32 APIs. To be
78 // able to pass strings to Win32 APIs on CE we need to convert them
79 // to 'Unicode', UTF-16.
80
81 // Creates a UTF-16 wide string from the given ANSI string, allocating
82 // memory using new. The caller is responsible for deleting the return
83 // value using delete[]. Returns the wide string, or NULL if the
84 // input is NULL.
85 //
86 // The wide string is created using the ANSI codepage (CP_ACP) to
87 // match the behaviour of the ANSI versions of Win32 calls and the
88 // C runtime.
89 static LPCWSTR AnsiToUtf16(const char* c_str);
90
91 // Creates an ANSI string from the given wide string, allocating
92 // memory using new. The caller is responsible for deleting the return
93 // value using delete[]. Returns the ANSI string, or NULL if the
94 // input is NULL.
95 //
96 // The returned string is created using the ANSI codepage (CP_ACP) to
97 // match the behaviour of the ANSI versions of Win32 calls and the
98 // C runtime.
99 static const char* Utf16ToAnsi(LPCWSTR utf16_str);
100#endif
101
102 // Compares two C strings. Returns true if and only if they have the same
103 // content.
104 //
105 // Unlike strcmp(), this function can handle NULL argument(s). A
106 // NULL C string is considered different to any non-NULL C string,
107 // including the empty string.
108 static bool CStringEquals(const char* lhs, const char* rhs);
109
110 // Converts a wide C string to a String using the UTF-8 encoding.
111 // NULL will be converted to "(null)". If an error occurred during
112 // the conversion, "(failed to convert from wide string)" is
113 // returned.
114 static std::string ShowWideCString(const wchar_t* wide_c_str);
115
116 // Compares two wide C strings. Returns true if and only if they have the
117 // same content.
118 //
119 // Unlike wcscmp(), this function can handle NULL argument(s). A
120 // NULL C string is considered different to any non-NULL C string,
121 // including the empty string.
122 static bool WideCStringEquals(const wchar_t* lhs, const wchar_t* rhs);
123
124 // Compares two C strings, ignoring case. Returns true if and only if
125 // they have the same content.
126 //
127 // Unlike strcasecmp(), this function can handle NULL argument(s).
128 // A NULL C string is considered different to any non-NULL C string,
129 // including the empty string.
130 static bool CaseInsensitiveCStringEquals(const char* lhs, const char* rhs);
131
132 // Compares two wide C strings, ignoring case. Returns true if and only if
133 // they have the same content.
134 //
135 // Unlike wcscasecmp(), this function can handle NULL argument(s).
136 // A NULL C string is considered different to any non-NULL wide C string,
137 // including the empty string.
138 // NB: The implementations on different platforms slightly differ.
139 // On windows, this method uses _wcsicmp which compares according to LC_CTYPE
140 // environment variable. On GNU platform this method uses wcscasecmp
141 // which compares according to LC_CTYPE category of the current locale.
142 // On MacOS X, it uses towlower, which also uses LC_CTYPE category of the
143 // current locale.
144 static bool CaseInsensitiveWideCStringEquals(const wchar_t* lhs,
145 const wchar_t* rhs);
146
147 // Returns true if and only if the given string ends with the given suffix,
148 // ignoring case. Any string is considered to end with an empty suffix.
149 static bool EndsWithCaseInsensitive(const std::string& str,
150 const std::string& suffix);
151
152 // Formats an int value as "%02d".
153 static std::string FormatIntWidth2(int value); // "%02d" for width == 2
154
155 // Formats an int value to given width with leading zeros.
156 static std::string FormatIntWidthN(int value, int width);
157
158 // Formats an int value as "%X".
159 static std::string FormatHexInt(int value);
160
161 // Formats an int value as "%X".
162 static std::string FormatHexUInt32(uint32_t value);
163
164 // Formats a byte as "%02X".
165 static std::string FormatByte(unsigned char value);
166
167 private:
168 String(); // Not meant to be instantiated.
169}; // class String
170
171// Gets the content of the stringstream's buffer as an std::string. Each '\0'
172// character in the buffer is replaced with "\\0".
173GTEST_API_ std::string StringStreamToString(::std::stringstream* stream);
174
175} // namespace internal
176} // namespace testing
177
178#endif // GOOGLETEST_INCLUDE_GTEST_INTERNAL_GTEST_STRING_H_
179