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Diffstat (limited to 'internal/ceres/file.cc')
-rw-r--r-- | internal/ceres/file.cc | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/internal/ceres/file.cc b/internal/ceres/file.cc new file mode 100644 index 0000000..387f359 --- /dev/null +++ b/internal/ceres/file.cc @@ -0,0 +1,93 @@ +// Ceres Solver - A fast non-linear least squares minimizer +// Copyright 2010, 2011, 2012 Google Inc. All rights reserved. +// http://code.google.com/p/ceres-solver/ +// +// 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 <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 |