67 lines
2.5 KiB
C++
67 lines
2.5 KiB
C++
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/**********
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This library is free software; you can redistribute it and/or modify it under
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the terms of the GNU Lesser General Public License as published by the
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Free Software Foundation; either version 2.1 of the License, or (at your
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option) any later version. (See <http://www.gnu.org/copyleft/lesser.html>.)
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This library is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
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more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this library; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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**********/
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// "liveMedia"
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// Copyright (c) 1996-2015 Live Networks, Inc. All rights reserved.
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// Common routines for opening/closing named input files
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// C++ header
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#ifndef _INPUT_FILE_HH
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#define _INPUT_FILE_HH
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#include <UsageEnvironment.hh>
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#include <stdio.h>
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#if (defined(__WIN32__) || defined(_WIN32) || defined(_WIN32_WCE))
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#ifndef _WIN32_WCE
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// Include header files that might be needed by Windows (in code that uses this header file):
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#include <io.h>
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#include <fcntl.h>
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#endif
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#define READ_FROM_FILES_SYNCHRONOUSLY 1
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// Because Windows is a silly toy operating system that doesn't (reliably) treat
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// open files as being readable sockets (which can be handled within the default
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// "BasicTaskScheduler" event loop, using "select()"), we implement file reading
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// in Windows using synchronous, rather than asynchronous, I/O. This can severely
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// limit the scalability of servers using this code that run on Windows.
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// If this is a problem for you, then either use a better operating system,
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// or else write your own Windows-specific event loop ("TaskScheduler" subclass)
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// that can handle readable data in Windows open files as an event.
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#endif
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#ifndef _WIN32_WCE
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#include <sys/stat.h>
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#endif
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FILE* OpenInputFile(UsageEnvironment& env, char const* fileName);
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void CloseInputFile(FILE* fid);
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u_int64_t GetFileSize(char const* fileName, FILE* fid);
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// 0 means zero-length, unbounded, or unknown
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int64_t SeekFile64(FILE *fid, int64_t offset, int whence);
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// A platform-independent routine for seeking within (possibly) large files
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int64_t TellFile64(FILE *fid);
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// A platform-independent routine for reporting the position within
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// (possibly) large files
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Boolean FileIsSeekable(FILE *fid);
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// Tests whether "fid" is seekable, by trying to seek within it.
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#endif
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