96 lines
3.4 KiB
C++
96 lines
3.4 KiB
C++
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// Ceres Solver - A fast non-linear least squares minimizer
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// Copyright 2015 Google Inc. All rights reserved.
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// http://ceres-solver.org/
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// * Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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// * Neither the name of Google Inc. nor the names of its contributors may be
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// used to endorse or promote products derived from this software without
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// specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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//
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// Author: keir@google.com (Keir Mierle)
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//
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// Really simple file IO.
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#include "ceres/file.h"
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#include <cstdio>
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#include "glog/logging.h"
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namespace ceres {
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namespace internal {
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using std::string;
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void WriteStringToFileOrDie(const string &data, const string &filename) {
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FILE* file_descriptor = fopen(filename.c_str(), "wb");
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if (!file_descriptor) {
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LOG(FATAL) << "Couldn't write to file: " << filename;
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}
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fwrite(data.c_str(), 1, data.size(), file_descriptor);
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fclose(file_descriptor);
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}
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void ReadFileToStringOrDie(const string &filename, string *data) {
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FILE* file_descriptor = fopen(filename.c_str(), "r");
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if (!file_descriptor) {
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LOG(FATAL) << "Couldn't read file: " << filename;
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}
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// Resize the input buffer appropriately.
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fseek(file_descriptor, 0L, SEEK_END);
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int num_bytes = ftell(file_descriptor);
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data->resize(num_bytes);
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// Read the data.
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fseek(file_descriptor, 0L, SEEK_SET);
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int num_read = fread(&((*data)[0]),
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sizeof((*data)[0]),
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num_bytes,
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file_descriptor);
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if (num_read != num_bytes) {
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LOG(FATAL) << "Couldn't read all of " << filename
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<< "expected bytes: " << num_bytes * sizeof((*data)[0])
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<< "actual bytes: " << num_read;
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}
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fclose(file_descriptor);
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}
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string JoinPath(const string& dirname, const string& basename) {
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#ifdef _WIN32
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static const char separator = '\\';
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#else
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static const char separator = '/';
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#endif // _WIN32
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if ((!basename.empty() && basename[0] == separator) || dirname.empty()) {
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return basename;
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} else if (dirname[dirname.size() - 1] == separator) {
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return dirname + basename;
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} else {
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return dirname + string(&separator, 1) + basename;
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}
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}
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} // namespace internal
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} // namespace ceres
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