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