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// Copyright 2014 The Crashpad Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef CRASHPAD_UTIL_STDLIB_STRING_NUMBER_CONVERSION_H_
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#define CRASHPAD_UTIL_STDLIB_STRING_NUMBER_CONVERSION_H_
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#include "base/strings/string_piece.h"
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namespace crashpad {
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// Convert between strings and numbers.
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//
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// These functions will only set *number if a perfect conversion can be
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// performed. A perfect conversion contains no leading or trailing characters
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// (including whitespace) other than the number to convert, and does not
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// overflow the targeted data type. If a perfect conversion is possible, *number
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// is set and these functions return true. Otherwise, they return false.
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//
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// The interface in base/strings/string_number_conversions.h doesn’t allow
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// arbitrary bases based on whether the string begins with prefixes such as "0x"
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// as strtol does with base = 0. The functions here are implemented on the
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// strtol family with base = 0, and thus do accept such input.
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//! \{
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//! \brief Convert a string to a number.
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//!
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//! A conversion will only be performed if it can be done perfectly: if \a
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//! string contains no leading or trailing characters (including whitespace)
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//! other than the number to convert, and does not overflow the targeted data
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//! type.
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//!
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//! \param[in] string The string to convert to a number. As in `strtol()` with a
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//! `base` parameter of `0`, the string is treated as decimal unless it
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//! begins with a `"0x"` or `"0X"` prefix, in which case it is treated as
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//! hexadecimal, or a `"0"` prefix, in which case it is treated as octal.
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//! \param[out] number The converted number. This will only be set if a perfect
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//! conversion can be performed.
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//!
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//! \return `true` if a perfect conversion could be performed, with \a number
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//! set appropriately. `false` if a perfect conversion was not possible.
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//!
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//! \note The interface in `base/strings/string_number_conversions.h` doesn’t
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//! allow arbitrary bases based on whether the string begins with a prefix
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//! indicating its base. The functions here are provided for situations
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//! where such prefix recognition is desirable.
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bool StringToNumber(const base::StringPiece& string, int* number);
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bool StringToNumber(const base::StringPiece& string, unsigned int* number);
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bool StringToNumber(const base::StringPiece& string, int64_t* number);
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bool StringToNumber(const base::StringPiece& string, uint64_t* number);
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//! \}
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} // namespace crashpad
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#endif // CRASHPAD_UTIL_STDLIB_STRING_NUMBER_CONVERSION_H_
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