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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