Add new entry in Release_Notes.

[simgrid.git] / src / xbt / xbt_os_file.cpp

diff --git a/src/xbt/xbt_os_file.cpp b/src/xbt/xbt_os_file.cpp
index e28fe03..32c7004 100644 (file)
--- a/src/xbt/xbt_os_file.cpp
+++ b/src/xbt/xbt_os_file.cpp
@@ -1,6 +1,6 @@
 /* xbt_os_file.cpp -- portable interface to file-related functions          */
 
-/* Copyright (c) 2017-2020. The SimGrid Team. All rights reserved.          */
+/* Copyright (c) 2017-2023. The SimGrid Team. All rights reserved.          */
 
 /* This program is free software; you can redistribute it and/or modify it
  * under the terms of the license (GNU LGPL) which comes with this package. */
@@ -9,40 +9,87 @@
 #include "xbt/asserts.h"
 #include "xbt/file.hpp" /* this module */
 
-#ifdef _WIN32
-#include <windows.h>
-#endif
-
 #if HAVE_UNISTD_H
+#include <array>
+#include <cerrno>
 #include <unistd.h>
 #endif
 
+#include <boost/algorithm/string.hpp>
 #include <cstring>
-#include <errno.h>
+#include <fstream>
 #include <libgen.h> /* POSIX dirname */
 
+static std::vector<std::string> file_path;
+
+void simgrid::xbt::path_push(std::string const& str)
+{
+  file_path.push_back(str);
+}
+void simgrid::xbt::path_pop()
+{
+  file_path.pop_back();
+}
+std::string simgrid::xbt::path_to_string()
+{
+  return boost::join(file_path, ":");
+}
+FILE* simgrid::xbt::path_fopen(const std::string& name, const char* mode)
+{
+  if (name[0] == '/') // don't mess with absolute file names
+    return fopen(name.c_str(), mode);
+
+  /* search relative files in the path */
+  for (auto const& path_elm : file_path) {
+    std::string buff = path_elm + "/" + name;
+    FILE* file       = fopen(buff.c_str(), mode);
+
+    if (file)
+      return file;
+  }
+  return nullptr;
+}
+
+std::ifstream* simgrid::xbt::path_ifsopen(const std::string& name)
+{
+  xbt_assert(not name.empty());
+
+  auto* fs = new std::ifstream();
+  if (name[0] == '/') // don't mess with absolute file names
+    fs->open(name.c_str(), std::ifstream::in);
+
+  /* search relative files in the path */
+  for (auto const& path_elm : file_path) {
+    std::string buff = path_elm + "/" + name;
+    fs->open(buff.c_str(), std::ifstream::in);
+
+    if (not fs->fail())
+      return fs;
+  }
+
+  return fs;
+}
+
 simgrid::xbt::Path::Path()
 {
 #if HAVE_UNISTD_H
-  char buffer[2048];
-  const char* ret = getcwd(buffer, 2048);
-  xbt_assert(ret == buffer, "Error during getcwd: %s", strerror(errno));
-  path_ = std::string(buffer);
+  std::array<char, 2048> buffer;
+  const char* cwd = getcwd(buffer.data(), 2048);
+  xbt_assert(cwd != nullptr, "Error during getcwd: %s", strerror(errno));
+  path_ = cwd;
 #else
-  path_ = std::string(".");
+  path_ = ".";
 #endif
 }
 
-std::string simgrid::xbt::Path::get_dir_name()
+std::string simgrid::xbt::Path::get_dir_name() const
 {
   std::string p(path_);
-  const char* res = dirname(&p[0]);
-  return std::string(res, strlen(res));
+  return dirname(&p[0]);
 }
 
-std::string simgrid::xbt::Path::get_base_name()
+std::string simgrid::xbt::Path::get_base_name() const
 {
   std::string p(path_);
-  const char* res = basename(&p[0]);
-  return std::string(res, strlen(res));
+  return basename(&p[0]);
 }