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Side by Side Diff: base/string_number_conversions.h

Issue 12092078: Move string_number_conversions to base/strings. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: merge, sort headers Created 7 years, 10 months ago
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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 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 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 #ifndef BASE_STRING_NUMBER_CONVERSIONS_H_ 5 // This file has moved, please use the new location.
6 #define BASE_STRING_NUMBER_CONVERSIONS_H_ 6 // TODO(brettw) remove this file when all users have been updated.
7 7 #include "base/strings/string_number_conversions.h"
8 #include <string>
9 #include <vector>
10
11 #include "base/base_export.h"
12 #include "base/basictypes.h"
13 #include "base/string_piece.h"
14 #include "base/string16.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/underflow. |*output| will be set to the maximum value supported
54 // by the data type.
55 // - Trailing characters in the string after parsing the number. |*output|
56 // will be set to the value of the number that was parsed.
57 // - Leading whitespace in the string before parsing the number. |*output| will
58 // be set to the value of the number that was parsed.
59 // - No characters parseable as a number at the beginning of the string.
60 // |*output| will be set to 0.
61 // - Empty string. |*output| will be set to 0.
62 BASE_EXPORT bool StringToInt(const StringPiece& input, int* output);
63 BASE_EXPORT bool StringToInt(const StringPiece16& input, int* output);
64
65 BASE_EXPORT bool StringToUint(const StringPiece& input, unsigned* output);
66 BASE_EXPORT bool StringToUint(const StringPiece16& input, unsigned* output);
67
68 BASE_EXPORT bool StringToInt64(const StringPiece& input, int64* output);
69 BASE_EXPORT bool StringToInt64(const StringPiece16& input, int64* output);
70
71 BASE_EXPORT bool StringToUint64(const StringPiece& input, uint64* output);
72 BASE_EXPORT bool StringToUint64(const StringPiece16& input, uint64* output);
73
74 BASE_EXPORT bool StringToSizeT(const StringPiece& input, size_t* output);
75 BASE_EXPORT bool StringToSizeT(const StringPiece16& input, size_t* output);
76
77 // For floating-point conversions, only conversions of input strings in decimal
78 // form are defined to work. Behavior with strings representing floating-point
79 // numbers in hexadecimal, and strings representing non-fininte values (such as
80 // NaN and inf) is undefined. Otherwise, these behave the same as the integral
81 // variants. This expects the input string to NOT be specific to the locale.
82 // If your input is locale specific, use ICU to read the number.
83 BASE_EXPORT bool StringToDouble(const std::string& input, double* output);
84
85 // Hex encoding ----------------------------------------------------------------
86
87 // Returns a hex string representation of a binary buffer. The returned hex
88 // string will be in upper case. This function does not check if |size| is
89 // within reasonable limits since it's written with trusted data in mind. If
90 // you suspect that the data you want to format might be large, the absolute
91 // max size for |size| should be is
92 // std::numeric_limits<size_t>::max() / 2
93 BASE_EXPORT std::string HexEncode(const void* bytes, size_t size);
94
95 // Best effort conversion, see StringToInt above for restrictions.
96 // Will only successful parse hex values that will fit into |output|, i.e.
97 // -0x80000000 < |input| < 0x7FFFFFFF.
98 BASE_EXPORT bool HexStringToInt(const StringPiece& input, int* output);
99
100 // Best effort conversion, see StringToInt above for restrictions.
101 // Will only successful parse hex values that will fit into |output|, i.e.
102 // -0x8000000000000000 < |input| < 0x7FFFFFFFFFFFFFFF.
103 BASE_EXPORT bool HexStringToInt64(const StringPiece& input, int64* output);
104
105 // Similar to the previous functions, except that output is a vector of bytes.
106 // |*output| will contain as many bytes as were successfully parsed prior to the
107 // error. There is no overflow, but input.size() must be evenly divisible by 2.
108 // Leading 0x or +/- are not allowed.
109 BASE_EXPORT bool HexStringToBytes(const std::string& input,
110 std::vector<uint8>* output);
111
112 } // namespace base
113
114 #endif // BASE_STRING_NUMBER_CONVERSIONS_H_
115
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