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1  // Protocol Buffers - Google's data interchange format
2  // Copyright 2012 Google Inc.  All rights reserved.
3  // https://developers.google.com/protocol-buffers/
4  //
5  // Redistribution and use in source and binary forms, with or without
6  // modification, are permitted provided that the following conditions are
7  // met:
8  //
9  //     * Redistributions of source code must retain the above copyright
10  // notice, this list of conditions and the following disclaimer.
11  //     * Redistributions in binary form must reproduce the above
12  // copyright notice, this list of conditions and the following disclaimer
13  // in the documentation and/or other materials provided with the
14  // distribution.
15  //     * Neither the name of Google Inc. nor the names of its
16  // contributors may be used to endorse or promote products derived from
17  // this software without specific prior written permission.
18  //
19  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20  // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21  // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22  // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23  // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24  // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25  // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26  // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27  // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28  // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29  // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30  
31  // from google3/base/stringprintf_unittest.cc
32  
33  #include <google/protobuf/stubs/stringprintf.h>
34  
35  #include <cerrno>
36  #include <string>
37  
38  #include <google/protobuf/testing/googletest.h>
39  #include <gtest/gtest.h>
40  
41  namespace google {
42  namespace protobuf {
43  namespace {
44  
TEST(StringPrintfTest,Empty)45  TEST(StringPrintfTest, Empty) {
46  #if 0
47    // gcc 2.95.3, gcc 4.1.0, and gcc 4.2.2 all warn about this:
48    // warning: zero-length printf format string.
49    // so we do not allow them in google3.
50    EXPECT_EQ("", StringPrintf(""));
51  #endif
52    EXPECT_EQ("", StringPrintf("%s", string().c_str()));
53    EXPECT_EQ("", StringPrintf("%s", ""));
54  }
55  
TEST(StringPrintfTest,Misc)56  TEST(StringPrintfTest, Misc) {
57  // MSVC and mingw does not support $ format specifier.
58  #if !defined(_MSC_VER) && !defined(__MINGW32__)
59    EXPECT_EQ("123hello w", StringPrintf("%3$d%2$s %1$c", 'w', "hello", 123));
60  #endif  // !_MSC_VER
61  }
62  
TEST(StringAppendFTest,Empty)63  TEST(StringAppendFTest, Empty) {
64    string value("Hello");
65    const char* empty = "";
66    StringAppendF(&value, "%s", empty);
67    EXPECT_EQ("Hello", value);
68  }
69  
TEST(StringAppendFTest,EmptyString)70  TEST(StringAppendFTest, EmptyString) {
71    string value("Hello");
72    StringAppendF(&value, "%s", "");
73    EXPECT_EQ("Hello", value);
74  }
75  
TEST(StringAppendFTest,String)76  TEST(StringAppendFTest, String) {
77    string value("Hello");
78    StringAppendF(&value, " %s", "World");
79    EXPECT_EQ("Hello World", value);
80  }
81  
TEST(StringAppendFTest,Int)82  TEST(StringAppendFTest, Int) {
83    string value("Hello");
84    StringAppendF(&value, " %d", 123);
85    EXPECT_EQ("Hello 123", value);
86  }
87  
TEST(StringPrintfTest,Multibyte)88  TEST(StringPrintfTest, Multibyte) {
89    // If we are in multibyte mode and feed invalid multibyte sequence,
90    // StringPrintf should return an empty string instead of running
91    // out of memory while trying to determine destination buffer size.
92    // see b/4194543.
93  
94    char* old_locale = setlocale(LC_CTYPE, NULL);
95    // Push locale with multibyte mode
96    setlocale(LC_CTYPE, "en_US.utf8");
97  
98    const char kInvalidCodePoint[] = "\375\067s";
99    string value = StringPrintf("%.*s", 3, kInvalidCodePoint);
100  
101    // In some versions of glibc (e.g. eglibc-2.11.1, aka GRTEv2), snprintf
102    // returns error given an invalid codepoint. Other versions
103    // (e.g. eglibc-2.15, aka pre-GRTEv3) emit the codepoint verbatim.
104    // We test that the output is one of the above.
105    EXPECT_TRUE(value.empty() || value == kInvalidCodePoint);
106  
107    // Repeat with longer string, to make sure that the dynamically
108    // allocated path in StringAppendV is handled correctly.
109    int n = 2048;
110    char* buf = new char[n+1];
111    memset(buf, ' ', n-3);
112    memcpy(buf + n - 3, kInvalidCodePoint, 4);
113    value =  StringPrintf("%.*s", n, buf);
114    // See GRTEv2 vs. GRTEv3 comment above.
115    EXPECT_TRUE(value.empty() || value == buf);
116    delete[] buf;
117  
118    setlocale(LC_CTYPE, old_locale);
119  }
120  
TEST(StringPrintfTest,NoMultibyte)121  TEST(StringPrintfTest, NoMultibyte) {
122    // No multibyte handling, but the string contains funny chars.
123    char* old_locale = setlocale(LC_CTYPE, NULL);
124    setlocale(LC_CTYPE, "POSIX");
125    string value = StringPrintf("%.*s", 3, "\375\067s");
126    setlocale(LC_CTYPE, old_locale);
127    EXPECT_EQ("\375\067s", value);
128  }
129  
TEST(StringPrintfTest,DontOverwriteErrno)130  TEST(StringPrintfTest, DontOverwriteErrno) {
131    // Check that errno isn't overwritten unless we're printing
132    // something significantly larger than what people are normally
133    // printing in their badly written PLOG() statements.
134    errno = ECHILD;
135    string value = StringPrintf("Hello, %s!", "World");
136    EXPECT_EQ(ECHILD, errno);
137  }
138  
TEST(StringPrintfTest,LargeBuf)139  TEST(StringPrintfTest, LargeBuf) {
140    // Check that the large buffer is handled correctly.
141    int n = 2048;
142    char* buf = new char[n+1];
143    memset(buf, ' ', n);
144    buf[n] = 0;
145    string value = StringPrintf("%s", buf);
146    EXPECT_EQ(buf, value);
147    delete[] buf;
148  }
149  
150  }  // anonymous namespace
151  }  // namespace protobuf
152  }  // namespace google
153