113 lines
3.0 KiB
C++
Executable File
113 lines
3.0 KiB
C++
Executable File
/**********
|
|
This library is free software; you can redistribute it and/or modify it under
|
|
the terms of the GNU Lesser General Public License as published by the
|
|
Free Software Foundation; either version 2.1 of the License, or (at your
|
|
option) any later version. (See <http://www.gnu.org/copyleft/lesser.html>.)
|
|
|
|
This library 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 Lesser General Public License for
|
|
more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with this library; if not, write to the Free Software Foundation, Inc.,
|
|
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
**********/
|
|
// "liveMedia"
|
|
// Copyright (c) 1996-2016 Live Networks, Inc. All rights reserved.
|
|
// Common routines for opening/closing named input files
|
|
// Implementation
|
|
|
|
#include "InputFile.hh"
|
|
#include <string.h>
|
|
|
|
FILE* OpenInputFile(UsageEnvironment& env, char const* fileName) {
|
|
FILE* fid;
|
|
|
|
// Check for a special case file name: "stdin"
|
|
if (strcmp(fileName, "stdin") == 0) {
|
|
fid = stdin;
|
|
#if (defined(__WIN32__) || defined(_WIN32)) && !defined(_WIN32_WCE)
|
|
_setmode(_fileno(stdin), _O_BINARY); // convert to binary mode
|
|
#endif
|
|
} else {
|
|
fid = fopen(fileName, "rb");
|
|
if (fid == NULL) {
|
|
env.setResultMsg("unable to open file \"",fileName, "\"");
|
|
}
|
|
}
|
|
|
|
return fid;
|
|
}
|
|
|
|
void CloseInputFile(FILE* fid) {
|
|
// Don't close 'stdin', in case we want to use it again later.
|
|
if (fid != NULL && fid != stdin) fclose(fid);
|
|
}
|
|
|
|
u_int64_t GetFileSize(char const* fileName, FILE* fid) {
|
|
u_int64_t fileSize = 0; // by default
|
|
|
|
if (fid != stdin) {
|
|
#if !defined(_WIN32_WCE)
|
|
if (fileName == NULL) {
|
|
#endif
|
|
if (fid != NULL && SeekFile64(fid, 0, SEEK_END) >= 0) {
|
|
fileSize = (u_int64_t)TellFile64(fid);
|
|
if (fileSize == (u_int64_t)-1) fileSize = 0; // TellFile64() failed
|
|
SeekFile64(fid, 0, SEEK_SET);
|
|
}
|
|
#if !defined(_WIN32_WCE)
|
|
} else {
|
|
struct stat sb;
|
|
if (stat(fileName, &sb) == 0) {
|
|
fileSize = sb.st_size;
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
return fileSize;
|
|
}
|
|
|
|
int64_t SeekFile64(FILE *fid, int64_t offset, int whence) {
|
|
if (fid == NULL) return -1;
|
|
|
|
clearerr(fid);
|
|
fflush(fid);
|
|
#if (defined(__WIN32__) || defined(_WIN32)) && !defined(_WIN32_WCE)
|
|
return _lseeki64(_fileno(fid), offset, whence) == (int64_t)-1 ? -1 : 0;
|
|
#else
|
|
#if defined(_WIN32_WCE)
|
|
return fseek(fid, (long)(offset), whence);
|
|
#else
|
|
return fseeko(fid, (off_t)(offset), whence);
|
|
#endif
|
|
#endif
|
|
}
|
|
|
|
int64_t TellFile64(FILE *fid) {
|
|
if (fid == NULL) return -1;
|
|
|
|
clearerr(fid);
|
|
fflush(fid);
|
|
#if (defined(__WIN32__) || defined(_WIN32)) && !defined(_WIN32_WCE)
|
|
return _telli64(_fileno(fid));
|
|
#else
|
|
#if defined(_WIN32_WCE)
|
|
return ftell(fid);
|
|
#else
|
|
return ftello(fid);
|
|
#endif
|
|
#endif
|
|
}
|
|
|
|
Boolean FileIsSeekable(FILE *fid) {
|
|
if (SeekFile64(fid, 1, SEEK_CUR) < 0) {
|
|
return False;
|
|
}
|
|
|
|
SeekFile64(fid, -1, SEEK_CUR); // seek back to where we were
|
|
return True;
|
|
}
|