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Side by Side Diff: base/strings/stringprintf.cc

Issue 1446363003: Deleted OS_WIN and all Windows specific files from base. (Closed) Base URL: https://github.com/domokit/mojo.git@base_tests
Patch Set: Created 5 years, 1 month ago
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1 // Copyright 2013 The Chromium Authors. All rights reserved. 1 // Copyright 2013 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #include "base/strings/stringprintf.h" 5 #include "base/strings/stringprintf.h"
6 6
7 #include <errno.h> 7 #include <errno.h>
8 8
9 #include <vector> 9 #include <vector>
10 10
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22 // large enough to accommodate the formatted string without truncation, they 22 // large enough to accommodate the formatted string without truncation, they
23 // return the number of characters that would be in the fully-formatted string 23 // return the number of characters that would be in the fully-formatted string
24 // (vsnprintf, and vswprintf on Windows), or -1 (vswprintf on POSIX platforms). 24 // (vsnprintf, and vswprintf on Windows), or -1 (vswprintf on POSIX platforms).
25 inline int vsnprintfT(char* buffer, 25 inline int vsnprintfT(char* buffer,
26 size_t buf_size, 26 size_t buf_size,
27 const char* format, 27 const char* format,
28 va_list argptr) { 28 va_list argptr) {
29 return base::vsnprintf(buffer, buf_size, format, argptr); 29 return base::vsnprintf(buffer, buf_size, format, argptr);
30 } 30 }
31 31
32 #if defined(OS_WIN)
33 inline int vsnprintfT(wchar_t* buffer,
34 size_t buf_size,
35 const wchar_t* format,
36 va_list argptr) {
37 return base::vswprintf(buffer, buf_size, format, argptr);
38 }
39 #endif
40
41 // Templatized backend for StringPrintF/StringAppendF. This does not finalize 32 // Templatized backend for StringPrintF/StringAppendF. This does not finalize
42 // the va_list, the caller is expected to do that. 33 // the va_list, the caller is expected to do that.
43 template <class StringType> 34 template <class StringType>
44 static void StringAppendVT(StringType* dst, 35 static void StringAppendVT(StringType* dst,
45 const typename StringType::value_type* format, 36 const typename StringType::value_type* format,
46 va_list ap) { 37 va_list ap) {
47 // First try with a small fixed size buffer. 38 // First try with a small fixed size buffer.
48 // This buffer size should be kept in sync with StringUtilTest.GrowBoundary 39 // This buffer size should be kept in sync with StringUtilTest.GrowBoundary
49 // and StringUtilTest.StringPrintfBounds. 40 // and StringUtilTest.StringPrintfBounds.
50 typename StringType::value_type stack_buf[1024]; 41 typename StringType::value_type stack_buf[1024];
51 42
52 va_list ap_copy; 43 va_list ap_copy;
53 va_copy(ap_copy, ap); 44 va_copy(ap_copy, ap);
54 45
55 #if !defined(OS_WIN)
56 ScopedClearErrno clear_errno; 46 ScopedClearErrno clear_errno;
57 #endif
58 int result = vsnprintfT(stack_buf, arraysize(stack_buf), format, ap_copy); 47 int result = vsnprintfT(stack_buf, arraysize(stack_buf), format, ap_copy);
59 va_end(ap_copy); 48 va_end(ap_copy);
60 49
61 if (result >= 0 && result < static_cast<int>(arraysize(stack_buf))) { 50 if (result >= 0 && result < static_cast<int>(arraysize(stack_buf))) {
62 // It fit. 51 // It fit.
63 dst->append(stack_buf, result); 52 dst->append(stack_buf, result);
64 return; 53 return;
65 } 54 }
66 55
67 // Repeatedly increase buffer size until it fits. 56 // Repeatedly increase buffer size until it fits.
68 int mem_length = arraysize(stack_buf); 57 int mem_length = arraysize(stack_buf);
69 while (true) { 58 while (true) {
70 if (result < 0) { 59 if (result < 0) {
71 #if defined(OS_WIN)
72 // On Windows, vsnprintfT always returns the number of characters in a
73 // fully-formatted string, so if we reach this point, something else is
74 // wrong and no amount of buffer-doubling is going to fix it.
75 return;
76 #else
77 if (errno != 0 && errno != EOVERFLOW) 60 if (errno != 0 && errno != EOVERFLOW)
78 return; 61 return;
79 // Try doubling the buffer size. 62 // Try doubling the buffer size.
80 mem_length *= 2; 63 mem_length *= 2;
81 #endif
82 } else { 64 } else {
83 // We need exactly "result + 1" characters. 65 // We need exactly "result + 1" characters.
84 mem_length = result + 1; 66 mem_length = result + 1;
85 } 67 }
86 68
87 if (mem_length > 32 * 1024 * 1024) { 69 if (mem_length > 32 * 1024 * 1024) {
88 // That should be plenty, don't try anything larger. This protects 70 // That should be plenty, don't try anything larger. This protects
89 // against huge allocations when using vsnprintfT implementations that 71 // against huge allocations when using vsnprintfT implementations that
90 // return -1 for reasons other than overflow without setting errno. 72 // return -1 for reasons other than overflow without setting errno.
91 DLOG(WARNING) << "Unable to printf the requested string due to size."; 73 DLOG(WARNING) << "Unable to printf the requested string due to size.";
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112 94
113 std::string StringPrintf(const char* format, ...) { 95 std::string StringPrintf(const char* format, ...) {
114 va_list ap; 96 va_list ap;
115 va_start(ap, format); 97 va_start(ap, format);
116 std::string result; 98 std::string result;
117 StringAppendV(&result, format, ap); 99 StringAppendV(&result, format, ap);
118 va_end(ap); 100 va_end(ap);
119 return result; 101 return result;
120 } 102 }
121 103
122 #if defined(OS_WIN)
123 std::wstring StringPrintf(const wchar_t* format, ...) {
124 va_list ap;
125 va_start(ap, format);
126 std::wstring result;
127 StringAppendV(&result, format, ap);
128 va_end(ap);
129 return result;
130 }
131 #endif
132
133 std::string StringPrintV(const char* format, va_list ap) { 104 std::string StringPrintV(const char* format, va_list ap) {
134 std::string result; 105 std::string result;
135 StringAppendV(&result, format, ap); 106 StringAppendV(&result, format, ap);
136 return result; 107 return result;
137 } 108 }
138 109
139 const std::string& SStringPrintf(std::string* dst, const char* format, ...) { 110 const std::string& SStringPrintf(std::string* dst, const char* format, ...) {
140 va_list ap; 111 va_list ap;
141 va_start(ap, format); 112 va_start(ap, format);
142 dst->clear(); 113 dst->clear();
143 StringAppendV(dst, format, ap); 114 StringAppendV(dst, format, ap);
144 va_end(ap); 115 va_end(ap);
145 return *dst; 116 return *dst;
146 } 117 }
147 118
148 #if defined(OS_WIN)
149 const std::wstring& SStringPrintf(std::wstring* dst,
150 const wchar_t* format, ...) {
151 va_list ap;
152 va_start(ap, format);
153 dst->clear();
154 StringAppendV(dst, format, ap);
155 va_end(ap);
156 return *dst;
157 }
158 #endif
159
160 void StringAppendF(std::string* dst, const char* format, ...) { 119 void StringAppendF(std::string* dst, const char* format, ...) {
161 va_list ap; 120 va_list ap;
162 va_start(ap, format); 121 va_start(ap, format);
163 StringAppendV(dst, format, ap); 122 StringAppendV(dst, format, ap);
164 va_end(ap); 123 va_end(ap);
165 } 124 }
166 125
167 #if defined(OS_WIN)
168 void StringAppendF(std::wstring* dst, const wchar_t* format, ...) {
169 va_list ap;
170 va_start(ap, format);
171 StringAppendV(dst, format, ap);
172 va_end(ap);
173 }
174 #endif
175
176 void StringAppendV(std::string* dst, const char* format, va_list ap) { 126 void StringAppendV(std::string* dst, const char* format, va_list ap) {
177 StringAppendVT(dst, format, ap); 127 StringAppendVT(dst, format, ap);
178 } 128 }
179 129
180 #if defined(OS_WIN)
181 void StringAppendV(std::wstring* dst, const wchar_t* format, va_list ap) {
182 StringAppendVT(dst, format, ap);
183 }
184 #endif
185
186 } // namespace base 130 } // namespace base
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