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| 1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2010 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/stringprintf.h" | 5 #include "base/stringprintf.h" |
| 6 | 6 |
| 7 #include <errno.h> | 7 #include <errno.h> |
| 8 | 8 |
| 9 #include "base/string_util.h" | 9 #include "base/string_util.h" |
| 10 #include "base/utf_string_conversions.h" | 10 #include "base/utf_string_conversions.h" |
| 11 | 11 |
| 12 namespace base { | 12 namespace base { |
| 13 | 13 |
| 14 namespace { | 14 namespace { |
| 15 | 15 |
| 16 // Overloaded wrappers around vsnprintf and vswprintf. The buf_size parameter | 16 // Overloaded wrappers around vsnprintf and vswprintf. The buf_size parameter |
| 17 // is the size of the buffer. These return the number of characters in the | 17 // is the size of the buffer. These return the number of characters in the |
| 18 // formatted string excluding the NUL terminator. If the buffer is not | 18 // formatted string excluding the NUL terminator. If the buffer is not |
| 19 // large enough to accommodate the formatted string without truncation, they | 19 // large enough to accommodate the formatted string without truncation, they |
| 20 // return the number of characters that would be in the fully-formatted string | 20 // return the number of characters that would be in the fully-formatted string |
| 21 // (vsnprintf, and vswprintf on Windows), or -1 (vswprintf on POSIX platforms). | 21 // (vsnprintf, and vswprintf on Windows), or -1 (vswprintf on POSIX platforms). |
| 22 inline int vsnprintfT(char* buffer, | 22 inline int vsnprintfT(char* buffer, |
| 23 size_t buf_size, | 23 size_t buf_size, |
| 24 const char* format, | 24 const char* format, |
| 25 va_list argptr) { | 25 va_list argptr) { |
| 26 return base::vsnprintf(buffer, buf_size, format, argptr); | 26 return base::vsnprintf(buffer, buf_size, format, argptr); |
| 27 } | 27 } |
| 28 | 28 |
| 29 #if !defined(OS_ANDROID) |
| 29 inline int vsnprintfT(wchar_t* buffer, | 30 inline int vsnprintfT(wchar_t* buffer, |
| 30 size_t buf_size, | 31 size_t buf_size, |
| 31 const wchar_t* format, | 32 const wchar_t* format, |
| 32 va_list argptr) { | 33 va_list argptr) { |
| 33 return base::vswprintf(buffer, buf_size, format, argptr); | 34 return base::vswprintf(buffer, buf_size, format, argptr); |
| 34 } | 35 } |
| 36 #endif |
| 35 | 37 |
| 36 // Templatized backend for StringPrintF/StringAppendF. This does not finalize | 38 // Templatized backend for StringPrintF/StringAppendF. This does not finalize |
| 37 // the va_list, the caller is expected to do that. | 39 // the va_list, the caller is expected to do that. |
| 38 template <class StringType> | 40 template <class StringType> |
| 39 static void StringAppendVT(StringType* dst, | 41 static void StringAppendVT(StringType* dst, |
| 40 const typename StringType::value_type* format, | 42 const typename StringType::value_type* format, |
| 41 va_list ap) { | 43 va_list ap) { |
| 42 // First try with a small fixed size buffer. | 44 // First try with a small fixed size buffer. |
| 43 // This buffer size should be kept in sync with StringUtilTest.GrowBoundary | 45 // This buffer size should be kept in sync with StringUtilTest.GrowBoundary |
| 44 // and StringUtilTest.StringPrintfBounds. | 46 // and StringUtilTest.StringPrintfBounds. |
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| 109 | 111 |
| 110 std::string StringPrintf(const char* format, ...) { | 112 std::string StringPrintf(const char* format, ...) { |
| 111 va_list ap; | 113 va_list ap; |
| 112 va_start(ap, format); | 114 va_start(ap, format); |
| 113 std::string result; | 115 std::string result; |
| 114 StringAppendV(&result, format, ap); | 116 StringAppendV(&result, format, ap); |
| 115 va_end(ap); | 117 va_end(ap); |
| 116 return result; | 118 return result; |
| 117 } | 119 } |
| 118 | 120 |
| 121 #if !defined(OS_ANDROID) |
| 119 std::wstring StringPrintf(const wchar_t* format, ...) { | 122 std::wstring StringPrintf(const wchar_t* format, ...) { |
| 120 va_list ap; | 123 va_list ap; |
| 121 va_start(ap, format); | 124 va_start(ap, format); |
| 122 std::wstring result; | 125 std::wstring result; |
| 123 StringAppendV(&result, format, ap); | 126 StringAppendV(&result, format, ap); |
| 124 va_end(ap); | 127 va_end(ap); |
| 125 return result; | 128 return result; |
| 126 } | 129 } |
| 130 #endif |
| 127 | 131 |
| 128 std::string StringPrintV(const char* format, va_list ap) { | 132 std::string StringPrintV(const char* format, va_list ap) { |
| 129 std::string result; | 133 std::string result; |
| 130 StringAppendV(&result, format, ap); | 134 StringAppendV(&result, format, ap); |
| 131 return result; | 135 return result; |
| 132 } | 136 } |
| 133 | 137 |
| 134 const std::string& SStringPrintf(std::string* dst, const char* format, ...) { | 138 const std::string& SStringPrintf(std::string* dst, const char* format, ...) { |
| 135 va_list ap; | 139 va_list ap; |
| 136 va_start(ap, format); | 140 va_start(ap, format); |
| 137 dst->clear(); | 141 dst->clear(); |
| 138 StringAppendV(dst, format, ap); | 142 StringAppendV(dst, format, ap); |
| 139 va_end(ap); | 143 va_end(ap); |
| 140 return *dst; | 144 return *dst; |
| 141 } | 145 } |
| 142 | 146 |
| 147 #if !defined(OS_ANDROID) |
| 143 const std::wstring& SStringPrintf(std::wstring* dst, | 148 const std::wstring& SStringPrintf(std::wstring* dst, |
| 144 const wchar_t* format, ...) { | 149 const wchar_t* format, ...) { |
| 145 va_list ap; | 150 va_list ap; |
| 146 va_start(ap, format); | 151 va_start(ap, format); |
| 147 dst->clear(); | 152 dst->clear(); |
| 148 StringAppendV(dst, format, ap); | 153 StringAppendV(dst, format, ap); |
| 149 va_end(ap); | 154 va_end(ap); |
| 150 return *dst; | 155 return *dst; |
| 151 } | 156 } |
| 157 #endif |
| 152 | 158 |
| 153 void StringAppendF(std::string* dst, const char* format, ...) { | 159 void StringAppendF(std::string* dst, const char* format, ...) { |
| 154 va_list ap; | 160 va_list ap; |
| 155 va_start(ap, format); | 161 va_start(ap, format); |
| 156 StringAppendV(dst, format, ap); | 162 StringAppendV(dst, format, ap); |
| 157 va_end(ap); | 163 va_end(ap); |
| 158 } | 164 } |
| 159 | 165 |
| 166 #if !defined(OS_ANDROID) |
| 160 void StringAppendF(std::wstring* dst, const wchar_t* format, ...) { | 167 void StringAppendF(std::wstring* dst, const wchar_t* format, ...) { |
| 161 va_list ap; | 168 va_list ap; |
| 162 va_start(ap, format); | 169 va_start(ap, format); |
| 163 StringAppendV(dst, format, ap); | 170 StringAppendV(dst, format, ap); |
| 164 va_end(ap); | 171 va_end(ap); |
| 165 } | 172 } |
| 173 #endif |
| 166 | 174 |
| 167 void StringAppendV(std::string* dst, const char* format, va_list ap) { | 175 void StringAppendV(std::string* dst, const char* format, va_list ap) { |
| 168 StringAppendVT(dst, format, ap); | 176 StringAppendVT(dst, format, ap); |
| 169 } | 177 } |
| 170 | 178 |
| 179 #if !defined(OS_ANDROID) |
| 171 void StringAppendV(std::wstring* dst, const wchar_t* format, va_list ap) { | 180 void StringAppendV(std::wstring* dst, const wchar_t* format, va_list ap) { |
| 172 StringAppendVT(dst, format, ap); | 181 StringAppendVT(dst, format, ap); |
| 173 } | 182 } |
| 183 #endif |
| 174 | 184 |
| 175 } // namespace base | 185 } // namespace base |
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