| // 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 <string> |
| |
| #include "glog/logging.h" |
| |
| namespace ceres::internal { |
| |
| void WriteStringToFileOrDie(const std::string& data, |
| const std::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 std::string& filename, std::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); |
| } |
| |
| std::string JoinPath(const std::string& dirname, const std::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 + std::string(&separator, 1) + basename; |
| } |
| } |
| |
| } // namespace ceres::internal |