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MinidumpStringWriter is responsible for writing variable-length UTF-16 (MINIDUMP_STRING) and UTF-8 (MinidumpUTF8String) strings to minidump files. This change depends on https://codereview.chromium.org/430003003/ and https://codereview.chromium.org/435013002/. TEST=minidump_test MinidumpStringWriter.* R=rsesek@chromium.org Review URL: https://codereview.chromium.org/431363002
91 lines
3.7 KiB
C++
91 lines
3.7 KiB
C++
// 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_MINIDUMP_MINIDUMP_WRITER_UTIL_H_
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#define CRASHPAD_MINIDUMP_MINIDUMP_WRITER_UTIL_H_
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#include <stdint.h>
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#include <sys/types.h>
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#include <time.h>
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#include <string>
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#include "base/basictypes.h"
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#include "base/strings/string16.h"
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namespace crashpad {
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namespace internal {
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//! \brief A collection of utility functions used by the MinidumpWritable family
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//! of classes.
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class MinidumpWriterUtil final {
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public:
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//! \brief Assigns a `time_t` value, logging a warning if the result overflows
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//! the destination buffer and will be truncated.
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//!
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//! \param[out] destination A pointer to the variable to be assigned to.
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//! \param[in] source The value to assign.
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//!
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//! The minidump format uses `uint32_t` for many timestamp values, but
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//! `time_t` may be wider than this. These year 2038 bugs are a limitation of
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//! the minidump format. An out-of-range error will be noted with a warning,
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//! but is not considered fatal. \a source will be truncated and assigned to
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//! \a destination in this case.
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//!
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//! For `time_t` values with nonfatal overflow semantics, this function is
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//! used in preference to AssignIfInRange(), which fails without performing an
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//! assignment when an out-of-range condition is detected.
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static void AssignTimeT(uint32_t* destination, time_t source);
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//! \brief Converts a UTF-8 string to UTF-16 and returns it. If the string
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//! cannot be converted losslessly, indicating that the input is not
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//! well-formed UTF-8, a warning is logged.
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//!
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//! \param[in] utf8 The UTF-8-encoded string to convert.
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//!
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//! \return The \a utf8 string, converted to UTF-16 encoding. If the
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//! conversion is lossy, U+FFFD “replacement characters” will be
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//! introduced.
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static string16 ConvertUTF8ToUTF16(const std::string& utf8);
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//! \brief Converts a UTF-8 string to UTF-16 and places it into a buffer of
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//! fixed size, taking care to `NUL`-terminate the buffer and not to
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//! overflow it. If the string will be truncated or if it cannot be
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//! converted losslessly, a warning is logged.
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//!
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//! Any unused portion of the \a destination buffer that is not written to by
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//! the converted string will be overwritten with `NUL` UTF-16 code units,
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//! thus, this function always writes \a destination_size `char16` units.
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//!
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//! If the conversion is lossy, U+FFFD “replacement characters” will be
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//! introduced.
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//!
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//! \param[out] destination A pointer to the destination buffer, where the
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//! UTF-16-encoded string will be written.
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//! \param[in] destination_size The size of \a destination in `char16` units,
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//! including space used by a `NUL` terminator.
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//! \param[in] source The UTF-8-encoded input string.
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static void AssignUTF8ToUTF16(char16* destination,
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size_t destination_size,
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const std::string& source);
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private:
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DISALLOW_IMPLICIT_CONSTRUCTORS(MinidumpWriterUtil);
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};
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} // namespace internal
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} // namespace crashpad
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#endif // CRASHPAD_MINIDUMP_MINIDUMP_WRITER_UTIL_H_
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