X-Git-Url: https://git.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Ffile.cc;h=36102f72081d979b7a61bac5ca4609805beb87d8;hb=addd5e1625fce3477736b54356f0edeaa0f6cc5d;hp=aabda166fe84934c80645312a4aea400f754d7ab;hpb=77b0ffe6c50796b8fb132f56394995e0df089713;p=libdcp.git

diff --git a/src/file.cc b/src/file.cc
index aabda166..36102f72 100644
--- a/src/file.cc
+++ b/src/file.cc
@@ -1,46 +1,218 @@
 /*
-    Copyright (C) 2014 Carl Hetherington <cth@carlh.net>
+    Copyright (C) 2022 Carl Hetherington <cth@carlh.net>
 
-    This program is free software; you can redistribute it and/or modify
+    This file is part of libdcp.
+
+    libdcp is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 2 of the License, or
     (at your option) any later version.
 
-    This program is distributed in the hope that it will be useful,
+    libdcp is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
 
     You should have received a copy of the GNU General Public License
-    along with this program; if not, write to the Free Software
-    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+    along with libdcp.  If not, see <http://www.gnu.org/licenses/>.
+
+    In addition, as a special exception, the copyright holders give
+    permission to link the code of portions of this program with the
+    OpenSSL library under certain conditions as described in each
+    individual source file, and distribute linked combinations
+    including the two.
 
+    You must obey the GNU General Public License in all respects
+    for all of the code used other than OpenSSL.  If you modify
+    file(s) with this exception, you may extend this exception to your
+    version of the file(s), but you are not obligated to do so.  If you
+    do not wish to do so, delete this exception statement from your
+    version.  If you delete this exception statement from all source
+    files in the program, then also delete it here.
 */
 
-/** @file  src/file.cc
- *  @brief File class.
- */
 
+#include "dcp_assert.h"
 #include "file.h"
-#include "util.h"
+#include "filesystem.h"
+#ifdef LIBDCP_WINDOWS
+#include <errhandlingapi.h>
+#endif
+#include <stdio.h>
+
 
 using namespace dcp;
 
-/** Read a file into memory.
- *  @param file to read.
- */
-File::File (boost::filesystem::path file)
+
+File::~File()
+{
+	close();
+}
+
+
+File::File(boost::filesystem::path path, std::string mode)
+	: _path(path)
+{
+#ifdef LIBDCP_WINDOWS
+	SetLastError(0);
+	std::wstring mode_wide(mode.begin(), mode.end());
+	/* c_str() here should give a UTF-16 string */
+	_file = _wfopen(dcp::filesystem::fix_long_path(path).c_str(), mode_wide.c_str());
+	if (!_file) {
+		_open_error = GetLastError();
+	}
+#else
+        _file = fopen(path.c_str(), mode.c_str());
+	if (!_file) {
+		_open_error = errno;
+	}
+#endif
+}
+
+
+File::File(File&& other)
+	: _path(other._path)
+	, _file(other._file)
+	, _open_error(other._open_error)
+{
+	other._file = nullptr;
+}
+
+
+File&
+File::operator=(File&& other)
+{
+	if (*this != other) {
+		close();
+		_file = other._file;
+		_open_error = other._open_error;
+		other._file = nullptr;
+	}
+	return *this;
+}
+
+
+void
+File::close()
+{
+	if (_file) {
+		fclose(_file);
+		_file = nullptr;
+	}
+}
+
+
+size_t
+File::write(const void *ptr, size_t size, size_t nmemb)
+{
+	DCP_ASSERT(_file);
+	return fwrite(ptr, size, nmemb, _file);
+}
+
+
+size_t
+File::read(void *ptr, size_t size, size_t nmemb)
+{
+	DCP_ASSERT(_file);
+	return fread(ptr, size, nmemb, _file);
+}
+
+
+int
+File::eof()
+{
+	DCP_ASSERT(_file);
+	return feof(_file);
+}
+
+
+char *
+File::gets(char* s, int size)
 {
-	_size = boost::filesystem::file_size (file);
-	_data = new uint8_t[_size];
-	FILE* f = dcp::fopen_boost (file, "r");
-	assert (f);
-	fread (_data, 1, _size, f);
-	fclose (f);
+	DCP_ASSERT(_file);
+	return fgets(s, size, _file);
 }
 
-/** File destructor */
-File::~File ()
+
+int
+File::puts(char const* s)
+{
+	DCP_ASSERT(_file);
+	return fputs(s, _file);
+}
+
+
+File::operator bool() const
+{
+	return _file != nullptr;
+}
+
+
+void
+File::checked_write(void const * ptr, size_t size)
+{
+	size_t N = write(ptr, 1, size);
+	if (N != size) {
+		if (ferror(_file)) {
+			throw FileError("fwrite error", _path, errno);
+		} else {
+			throw FileError("Unexpected short write", _path, 0);
+		}
+	}
+}
+
+
+void
+File::checked_read(void* ptr, size_t size)
+{
+	size_t N = read(ptr, 1, size);
+	if (N != size) {
+		if (ferror(_file)) {
+			throw FileError("fread error %1", _path, errno);
+		} else {
+			throw FileError("Unexpected short read", _path, 0);
+		}
+	}
+}
+
+
+FILE*
+File::take()
+{
+	auto give = _file;
+	_file = nullptr;
+	return give;
+}
+
+
+int
+File::seek(int64_t offset, int whence)
+{
+	DCP_ASSERT(_file);
+#ifdef LIBDCP_WINDOWS
+	return _fseeki64(_file, offset, whence);
+#else
+	return fseek(_file, offset, whence);
+#endif
+}
+
+
+int64_t
+File::tell()
+{
+	DCP_ASSERT(_file);
+#ifdef LIBDCP_WINDOWS
+	return _ftelli64(_file);
+#else
+	return ftell(_file);
+#endif
+}
+
+
+
+int
+File::error ()
 {
-	delete[] _data;
+	DCP_ASSERT(_file);
+	return ferror(_file);
 }