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comparison: security/sandbox/chromium/base/strings/string_number_conversions.h
security/sandbox/chromium/base/strings/string_number_conversions.h
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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef BASE_STRINGS_STRING_NUMBER_CONVERSIONS_H_ | |
| 6 #define BASE_STRINGS_STRING_NUMBER_CONVERSIONS_H_ | |
| 7 | |
| 8 #include <string> | |
| 9 #include <vector> | |
| 10 | |
| 11 #include "base/base_export.h" | |
| 12 #include "base/basictypes.h" | |
| 13 #include "base/strings/string16.h" | |
| 14 #include "base/strings/string_piece.h" | |
| 15 | |
| 16 // ---------------------------------------------------------------------------- | |
| 17 // IMPORTANT MESSAGE FROM YOUR SPONSOR | |
| 18 // | |
| 19 // This file contains no "wstring" variants. New code should use string16. If | |
| 20 // you need to make old code work, use the UTF8 version and convert. Please do | |
| 21 // not add wstring variants. | |
| 22 // | |
| 23 // Please do not add "convenience" functions for converting strings to integers | |
| 24 // that return the value and ignore success/failure. That encourages people to | |
| 25 // write code that doesn't properly handle the error conditions. | |
| 26 // ---------------------------------------------------------------------------- | |
| 27 | |
| 28 namespace base { | |
| 29 | |
| 30 // Number -> string conversions ------------------------------------------------ | |
| 31 | |
| 32 BASE_EXPORT std::string IntToString(int value); | |
| 33 BASE_EXPORT string16 IntToString16(int value); | |
| 34 | |
| 35 BASE_EXPORT std::string UintToString(unsigned value); | |
| 36 BASE_EXPORT string16 UintToString16(unsigned value); | |
| 37 | |
| 38 BASE_EXPORT std::string Int64ToString(int64 value); | |
| 39 BASE_EXPORT string16 Int64ToString16(int64 value); | |
| 40 | |
| 41 BASE_EXPORT std::string Uint64ToString(uint64 value); | |
| 42 BASE_EXPORT string16 Uint64ToString16(uint64 value); | |
| 43 | |
| 44 // DoubleToString converts the double to a string format that ignores the | |
| 45 // locale. If you want to use locale specific formatting, use ICU. | |
| 46 BASE_EXPORT std::string DoubleToString(double value); | |
| 47 | |
| 48 // String -> number conversions ------------------------------------------------ | |
| 49 | |
| 50 // Perform a best-effort conversion of the input string to a numeric type, | |
| 51 // setting |*output| to the result of the conversion. Returns true for | |
| 52 // "perfect" conversions; returns false in the following cases: | |
| 53 // - Overflow. |*output| will be set to the maximum value supported | |
| 54 // by the data type. | |
| 55 // - Underflow. |*output| will be set to the minimum value supported | |
| 56 // by the data type. | |
| 57 // - Trailing characters in the string after parsing the number. |*output| | |
| 58 // will be set to the value of the number that was parsed. | |
| 59 // - Leading whitespace in the string before parsing the number. |*output| will | |
| 60 // be set to the value of the number that was parsed. | |
| 61 // - No characters parseable as a number at the beginning of the string. | |
| 62 // |*output| will be set to 0. | |
| 63 // - Empty string. |*output| will be set to 0. | |
| 64 BASE_EXPORT bool StringToInt(const StringPiece& input, int* output); | |
| 65 BASE_EXPORT bool StringToInt(const StringPiece16& input, int* output); | |
| 66 | |
| 67 BASE_EXPORT bool StringToUint(const StringPiece& input, unsigned* output); | |
| 68 BASE_EXPORT bool StringToUint(const StringPiece16& input, unsigned* output); | |
| 69 | |
| 70 BASE_EXPORT bool StringToInt64(const StringPiece& input, int64* output); | |
| 71 BASE_EXPORT bool StringToInt64(const StringPiece16& input, int64* output); | |
| 72 | |
| 73 BASE_EXPORT bool StringToUint64(const StringPiece& input, uint64* output); | |
| 74 BASE_EXPORT bool StringToUint64(const StringPiece16& input, uint64* output); | |
| 75 | |
| 76 BASE_EXPORT bool StringToSizeT(const StringPiece& input, size_t* output); | |
| 77 BASE_EXPORT bool StringToSizeT(const StringPiece16& input, size_t* output); | |
| 78 | |
| 79 // For floating-point conversions, only conversions of input strings in decimal | |
| 80 // form are defined to work. Behavior with strings representing floating-point | |
| 81 // numbers in hexadecimal, and strings representing non-fininte values (such as | |
| 82 // NaN and inf) is undefined. Otherwise, these behave the same as the integral | |
| 83 // variants. This expects the input string to NOT be specific to the locale. | |
| 84 // If your input is locale specific, use ICU to read the number. | |
| 85 BASE_EXPORT bool StringToDouble(const std::string& input, double* output); | |
| 86 | |
| 87 // Hex encoding ---------------------------------------------------------------- | |
| 88 | |
| 89 // Returns a hex string representation of a binary buffer. The returned hex | |
| 90 // string will be in upper case. This function does not check if |size| is | |
| 91 // within reasonable limits since it's written with trusted data in mind. If | |
| 92 // you suspect that the data you want to format might be large, the absolute | |
| 93 // max size for |size| should be is | |
| 94 // std::numeric_limits<size_t>::max() / 2 | |
| 95 BASE_EXPORT std::string HexEncode(const void* bytes, size_t size); | |
| 96 | |
| 97 // Best effort conversion, see StringToInt above for restrictions. | |
| 98 // Will only successful parse hex values that will fit into |output|, i.e. | |
| 99 // -0x80000000 < |input| < 0x7FFFFFFF. | |
| 100 BASE_EXPORT bool HexStringToInt(const StringPiece& input, int* output); | |
| 101 | |
| 102 // Best effort conversion, see StringToInt above for restrictions. | |
| 103 // Will only successful parse hex values that will fit into |output|, i.e. | |
| 104 // -0x8000000000000000 < |input| < 0x7FFFFFFFFFFFFFFF. | |
| 105 BASE_EXPORT bool HexStringToInt64(const StringPiece& input, int64* output); | |
| 106 | |
| 107 // Best effort conversion, see StringToInt above for restrictions. | |
| 108 // Will only successful parse hex values that will fit into |output|, i.e. | |
| 109 // 0x0000000000000000 < |input| < 0xFFFFFFFFFFFFFFFF. | |
| 110 // The string is not required to start with 0x. | |
| 111 BASE_EXPORT bool HexStringToUInt64(const StringPiece& input, uint64* output); | |
| 112 | |
| 113 // Similar to the previous functions, except that output is a vector of bytes. | |
| 114 // |*output| will contain as many bytes as were successfully parsed prior to the | |
| 115 // error. There is no overflow, but input.size() must be evenly divisible by 2. | |
| 116 // Leading 0x or +/- are not allowed. | |
| 117 BASE_EXPORT bool HexStringToBytes(const std::string& input, | |
| 118 std::vector<uint8>* output); | |
| 119 | |
| 120 } // namespace base | |
| 121 | |
| 122 #endif // BASE_STRINGS_STRING_NUMBER_CONVERSIONS_H_ |
