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Location: cpp/openttd-patchpack/source/fileio.c - annotation
r504:d77ba5d8291b
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(svn r803) Switch to ISO 8859-15
It has proper support for the euro sign and includes letters which are needed by the Latvian translation (and perhaps others), though the letter sprites are missing.
It has proper support for the euro sign and includes letters which are needed by the Latvian translation (and perhaps others), though the letter sprites are missing.
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#include "ttd.h"
#if defined(UNIX)
#include <ctype.h> // required for tolower()
#endif
/*************************************************/
/* FILE IO ROUTINES ******************************/
/*************************************************/
#define FIO_BUFFER_SIZE 512
typedef struct {
byte *buffer, *buffer_end;
uint32 pos;
FILE *cur_fh;
FILE *handles[32];
byte buffer_start[512];
} Fio;
static Fio _fio;
// Get current position in file
uint32 FioGetPos()
{
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;
fseek(_fio.cur_fh, (_fio.pos=pos), SEEK_SET);
}
// Seek to a file and a position
void FioSeekToFile(uint32 pos)
{
FILE *f = _fio.handles[pos >> 24];
assert(f != NULL);
_fio.cur_fh = f;
FioSeekTo(pos & 0xFFFFFF, SEEK_SET);
}
byte FioReadByte()
{
if (_fio.buffer == _fio.buffer_end) {
_fio.pos += FIO_BUFFER_SIZE;
fread(_fio.buffer = _fio.buffer_start, 1, FIO_BUFFER_SIZE, _fio.cur_fh);
}
return *_fio.buffer++;
}
void FioSkipBytes(int n)
{
for(;;) {
int m = min(_fio.buffer_end - _fio.buffer, n);
_fio.buffer += m;
n -= m;
if (n == 0) break;
FioReadByte();
n--;
}
}
uint16 FioReadWord()
{
byte b = FioReadByte();
return (FioReadByte() << 8) | b;
}
uint32 FioReadDword()
{
uint b = FioReadWord();
return (FioReadWord() << 16) | b;
}
void FioReadBlock(void *ptr, uint size)
{
FioSeekTo(FioGetPos(), SEEK_SET);
_fio.pos += size;
fread(ptr, 1, size, _fio.cur_fh);
}
void FioCloseAll()
{
int i;
for(i=0; i!=lengthof(_fio.handles); i++) {
if (_fio.handles[i] != NULL) {
fclose(_fio.handles[i]);
_fio.handles[i] = NULL;
}
}
}
void FioOpenFile(int slot, const char *filename)
{
FILE *f;
char buf[MAX_PATH];
sprintf(buf, "%s%s", _path.data_dir, filename);
f = fopen(buf, "rb");
#if !defined(WIN32)
if (f == NULL) {
char *s;
// Make lower case and try again
for(s=buf + strlen(_path.data_dir) - 1; *s != 0; s++)
*s = tolower(*s);
f = fopen(buf, "rb");
}
#endif
if (f == NULL)
error("Cannot open file '%s'", buf);
_fio.handles[slot] = f;
FioSeekToFile(slot << 24);
}
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