10ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// Ceres Solver - A fast non-linear least squares minimizer 20ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// Copyright 2010, 2011, 2012 Google Inc. All rights reserved. 30ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// http://code.google.com/p/ceres-solver/ 40ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// 50ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// Redistribution and use in source and binary forms, with or without 60ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// modification, are permitted provided that the following conditions are met: 70ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// 80ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// * Redistributions of source code must retain the above copyright notice, 90ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// this list of conditions and the following disclaimer. 100ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// * Redistributions in binary form must reproduce the above copyright notice, 110ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// this list of conditions and the following disclaimer in the documentation 120ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// and/or other materials provided with the distribution. 130ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// * Neither the name of Google Inc. nor the names of its contributors may be 140ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// used to endorse or promote products derived from this software without 150ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// specific prior written permission. 160ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// 170ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 180ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 190ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 200ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 210ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 220ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 230ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 240ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 250ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 260ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 270ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// POSSIBILITY OF SUCH DAMAGE. 280ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// 290ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// Author: keir@google.com (Keir Mierle) 300ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// 310ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong// Really simple file IO. 320ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong 331d2624a10e2c559f8ba9ef89eaa30832c0a83a96Sascha Haeberling#include "ceres/file.h" 341d2624a10e2c559f8ba9ef89eaa30832c0a83a96Sascha Haeberling 350ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong#include <cstdio> 360ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong#include "glog/logging.h" 370ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong 380ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kongnamespace ceres { 390ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kongnamespace internal { 400ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong 410ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kongusing std::string; 420ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong 430ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kongvoid WriteStringToFileOrDie(const string &data, const string &filename) { 440ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong FILE* file_descriptor = fopen(filename.c_str(), "wb"); 450ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong if (!file_descriptor) { 460ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong LOG(FATAL) << "Couldn't write to file: " << filename; 470ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong } 480ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong fwrite(data.c_str(), 1, data.size(), file_descriptor); 490ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong fclose(file_descriptor); 500ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong} 510ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong 520ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kongvoid ReadFileToStringOrDie(const string &filename, string *data) { 530ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong FILE* file_descriptor = fopen(filename.c_str(), "r"); 540ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong 550ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong if (!file_descriptor) { 560ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong LOG(FATAL) << "Couldn't read file: " << filename; 570ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong } 580ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong 590ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong // Resize the input buffer appropriately. 600ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong fseek(file_descriptor, 0L, SEEK_END); 610ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong int num_bytes = ftell(file_descriptor); 620ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong data->resize(num_bytes); 630ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong 640ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong // Read the data. 650ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong fseek(file_descriptor, 0L, SEEK_SET); 660ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong int num_read = fread(&((*data)[0]), 670ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong sizeof((*data)[0]), 680ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong num_bytes, 690ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong file_descriptor); 700ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong if (num_read != num_bytes) { 710ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong LOG(FATAL) << "Couldn't read all of " << filename 720ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong << "expected bytes: " << num_bytes * sizeof((*data)[0]) 730ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong << "actual bytes: " << num_read; 740ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong } 750ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong fclose(file_descriptor); 760ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong} 770ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong 780ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kongstring JoinPath(const string& dirname, const string& basename) { 790ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong#ifdef _WIN32 800ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong static const char separator = '\\'; 810ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong#else 820ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong static const char separator = '/'; 830ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong#endif // _WIN32 840ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong 850ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong if ((!basename.empty() && basename[0] == separator) || dirname.empty()) { 860ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong return basename; 870ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong } else if (dirname[dirname.size() - 1] == separator) { 880ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong return dirname + basename; 890ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong } else { 900ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong return dirname + string(&separator, 1) + basename; 910ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong } 920ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong} 930ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong 940ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong} // namespace internal 950ae28bd5885b5daa526898fcf7c323dc2c3e1963Angus Kong} // namespace ceres 96