|
|
/* $Id$ */
|
|
|
|
|
|
/** @file fileio.cpp Standard In/Out file operations*/
|
|
|
|
|
|
#include "stdafx.h"
|
|
|
#include "openttd.h"
|
|
|
#include "fileio.h"
|
|
|
#include "functions.h"
|
|
|
#include "string.h"
|
|
|
#include "macros.h"
|
|
|
#include "variables.h"
|
|
|
#include "debug.h"
|
|
|
|
|
|
/*************************************************/
|
|
|
/* FILE IO ROUTINES ******************************/
|
|
|
/*************************************************/
|
|
@@ -22,25 +24,25 @@ typedef struct {
|
|
|
FILE *cur_fh; ///< current file handle
|
|
|
FILE *handles[MAX_HANDLES]; ///< array of file handles we can have open
|
|
|
byte buffer_start[FIO_BUFFER_SIZE]; ///< local buffer when read from file
|
|
|
#if defined(LIMITED_FDS)
|
|
|
uint open_handles; ///< current amount of open handles
|
|
|
const char *filename[MAX_HANDLES]; ///< array of filenames we (should) have open
|
|
|
uint usage_count[MAX_HANDLES]; ///< count how many times this file has been opened
|
|
|
#endif /* LIMITED_FDS */
|
|
|
} Fio;
|
|
|
|
|
|
static Fio _fio;
|
|
|
|
|
|
// Get current position in file
|
|
|
/* Get current position in file */
|
|
|
uint32 FioGetPos(void)
|
|
|
{
|
|
|
return _fio.pos + (_fio.buffer - _fio.buffer_start) - FIO_BUFFER_SIZE;
|
|
|
}
|
|
|
|
|
|
void FioSeekTo(uint32 pos, int mode)
|
|
|
{
|
|
|
if (mode == SEEK_CUR) pos += FioGetPos();
|
|
|
_fio.buffer = _fio.buffer_end = _fio.buffer_start + FIO_BUFFER_SIZE;
|
|
|
_fio.pos = pos;
|
|
|
fseek(_fio.cur_fh, _fio.pos, SEEK_SET);
|
|
|
}
|
|
@@ -48,25 +50,25 @@ void FioSeekTo(uint32 pos, int mode)
|
|
|
#if defined(LIMITED_FDS)
|
|
|
static void FioRestoreFile(int slot)
|
|
|
{
|
|
|
/* Do we still have the file open, or should we reopen it? */
|
|
|
if (_fio.handles[slot] == NULL) {
|
|
|
DEBUG(misc, 6, "Restoring file '%s' in slot '%d' from disk", _fio.filename[slot], slot);
|
|
|
FioOpenFile(slot, _fio.filename[slot]);
|
|
|
}
|
|
|
_fio.usage_count[slot]++;
|
|
|
}
|
|
|
#endif /* LIMITED_FDS */
|
|
|
|
|
|
// Seek to a file and a position
|
|
|
/* Seek to a file and a position */
|
|
|
void FioSeekToFile(uint32 pos)
|
|
|
{
|
|
|
FILE *f;
|
|
|
#if defined(LIMITED_FDS)
|
|
|
/* Make sure we have this file open */
|
|
|
FioRestoreFile(pos >> 24);
|
|
|
#endif /* LIMITED_FDS */
|
|
|
f = _fio.handles[pos >> 24];
|
|
|
assert(f != NULL);
|
|
|
_fio.cur_fh = f;
|
|
|
FioSeekTo(GB(pos, 0, 24), SEEK_SET);
|
|
|
}
|
|
@@ -168,25 +170,25 @@ FILE *FioFOpenFile(const char *filename)
|
|
|
FILE *f;
|
|
|
char buf[MAX_PATH];
|
|
|
|
|
|
snprintf(buf, lengthof(buf), "%s%s", _paths.data_dir, filename);
|
|
|
|
|
|
f = fopen(buf, "rb");
|
|
|
#if !defined(WIN32)
|
|
|
if (f == NULL) {
|
|
|
strtolower(buf + strlen(_paths.data_dir) - 1);
|
|
|
f = fopen(buf, "rb");
|
|
|
|
|
|
#if defined SECOND_DATA_DIR
|
|
|
// tries in the 2nd data directory
|
|
|
/* tries in the 2nd data directory */
|
|
|
if (f == NULL) {
|
|
|
snprintf(buf, lengthof(buf), "%s%s", _paths.second_data_dir, filename);
|
|
|
strtolower(buf + strlen(_paths.second_data_dir) - 1);
|
|
|
f = fopen(buf, "rb");
|
|
|
}
|
|
|
#endif
|
|
|
}
|
|
|
#endif
|
|
|
|
|
|
return f;
|
|
|
}
|
|
|
|