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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 // This file defines utility functions for working with strings. | 5 // This file defines utility functions for working with strings. |
| 6 | 6 |
| 7 #ifndef BASE_STRINGS_STRING_UTIL_H_ | 7 #ifndef BASE_STRINGS_STRING_UTIL_H_ |
| 8 #define BASE_STRINGS_STRING_UTIL_H_ | 8 #define BASE_STRINGS_STRING_UTIL_H_ |
| 9 | 9 |
| 10 #include <ctype.h> | 10 #include <ctype.h> |
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| 181 BASE_EXPORT bool TrimString(const std::string& input, | 181 BASE_EXPORT bool TrimString(const std::string& input, |
| 182 const char trim_chars[], | 182 const char trim_chars[], |
| 183 std::string* output); | 183 std::string* output); |
| 184 | 184 |
| 185 // Truncates a string to the nearest UTF-8 character that will leave | 185 // Truncates a string to the nearest UTF-8 character that will leave |
| 186 // the string less than or equal to the specified byte size. | 186 // the string less than or equal to the specified byte size. |
| 187 BASE_EXPORT void TruncateUTF8ToByteSize(const std::string& input, | 187 BASE_EXPORT void TruncateUTF8ToByteSize(const std::string& input, |
| 188 const size_t byte_size, | 188 const size_t byte_size, |
| 189 std::string* output); | 189 std::string* output); |
| 190 | 190 |
| 191 } // namespace base | |
| 192 | |
| 193 #if defined(OS_WIN) | |
| 194 #include "base/strings/string_util_win.h" | |
| 195 #elif defined(OS_POSIX) | |
| 196 #include "base/strings/string_util_posix.h" | |
| 197 #else | |
| 198 #error Define string operations appropriately for your platform | |
| 199 #endif | |
| 200 | |
| 201 // Trims any whitespace from either end of the input string. Returns where | 191 // Trims any whitespace from either end of the input string. Returns where |
| 202 // whitespace was found. | 192 // whitespace was found. |
| 203 // The non-wide version has two functions: | 193 // The non-wide version has two functions: |
| 204 // * TrimWhitespaceASCII() | 194 // * TrimWhitespaceASCII() |
| 205 // This function is for ASCII strings and only looks for ASCII whitespace; | 195 // This function is for ASCII strings and only looks for ASCII whitespace; |
| 206 // Please choose the best one according to your usage. | 196 // Please choose the best one according to your usage. |
| 207 // NOTE: Safe to use the same variable for both input and output. | 197 // NOTE: Safe to use the same variable for both input and output. |
| 208 enum TrimPositions { | 198 enum TrimPositions { |
| 209 TRIM_NONE = 0, | 199 TRIM_NONE = 0, |
| 210 TRIM_LEADING = 1 << 0, | 200 TRIM_LEADING = 1 << 0, |
| 211 TRIM_TRAILING = 1 << 1, | 201 TRIM_TRAILING = 1 << 1, |
| 212 TRIM_ALL = TRIM_LEADING | TRIM_TRAILING, | 202 TRIM_ALL = TRIM_LEADING | TRIM_TRAILING, |
| 213 }; | 203 }; |
| 214 BASE_EXPORT TrimPositions TrimWhitespace(const base::string16& input, | 204 BASE_EXPORT TrimPositions TrimWhitespace(const string16& input, |
| 215 TrimPositions positions, | 205 TrimPositions positions, |
| 216 base::string16* output); | 206 base::string16* output); |
| 217 BASE_EXPORT TrimPositions TrimWhitespaceASCII(const std::string& input, | 207 BASE_EXPORT TrimPositions TrimWhitespaceASCII(const std::string& input, |
| 218 TrimPositions positions, | 208 TrimPositions positions, |
| 219 std::string* output); | 209 std::string* output); |
| 220 | 210 |
| 221 // Deprecated. This function is only for backward compatibility and calls | 211 // Deprecated. This function is only for backward compatibility and calls |
| 222 // TrimWhitespaceASCII(). | 212 // TrimWhitespaceASCII(). |
| 223 BASE_EXPORT TrimPositions TrimWhitespace(const std::string& input, | 213 BASE_EXPORT TrimPositions TrimWhitespace(const std::string& input, |
| 224 TrimPositions positions, | 214 TrimPositions positions, |
| 225 std::string* output); | 215 std::string* output); |
| 226 | 216 |
| 217 } // namespace base |
| 218 |
| 219 #if defined(OS_WIN) |
| 220 #include "base/strings/string_util_win.h" |
| 221 #elif defined(OS_POSIX) |
| 222 #include "base/strings/string_util_posix.h" |
| 223 #else |
| 224 #error Define string operations appropriately for your platform |
| 225 #endif |
| 226 |
| 227 // Searches for CR or LF characters. Removes all contiguous whitespace | 227 // Searches for CR or LF characters. Removes all contiguous whitespace |
| 228 // strings that contain them. This is useful when trying to deal with text | 228 // strings that contain them. This is useful when trying to deal with text |
| 229 // copied from terminals. | 229 // copied from terminals. |
| 230 // Returns |text|, with the following three transformations: | 230 // Returns |text|, with the following three transformations: |
| 231 // (1) Leading and trailing whitespace is trimmed. | 231 // (1) Leading and trailing whitespace is trimmed. |
| 232 // (2) If |trim_sequences_with_line_breaks| is true, any other whitespace | 232 // (2) If |trim_sequences_with_line_breaks| is true, any other whitespace |
| 233 // sequences containing a CR or LF are trimmed. | 233 // sequences containing a CR or LF are trimmed. |
| 234 // (3) All other whitespace sequences are converted to single spaces. | 234 // (3) All other whitespace sequences are converted to single spaces. |
| 235 BASE_EXPORT base::string16 CollapseWhitespace( | 235 BASE_EXPORT base::string16 CollapseWhitespace( |
| 236 const base::string16& text, | 236 const base::string16& text, |
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| 527 #elif defined(WCHAR_T_IS_UTF32) | 527 #elif defined(WCHAR_T_IS_UTF32) |
| 528 typedef uint32 Unsigned; | 528 typedef uint32 Unsigned; |
| 529 #endif | 529 #endif |
| 530 }; | 530 }; |
| 531 template<> | 531 template<> |
| 532 struct ToUnsigned<short> { | 532 struct ToUnsigned<short> { |
| 533 typedef unsigned short Unsigned; | 533 typedef unsigned short Unsigned; |
| 534 }; | 534 }; |
| 535 | 535 |
| 536 #endif // BASE_STRINGS_STRING_UTIL_H_ | 536 #endif // BASE_STRINGS_STRING_UTIL_H_ |
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