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@ r662:d42c2c6d320b
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Location: cpp/openttd-patchpack/source/fileio.c
r662:d42c2c6d320b
2.5 KiB
text/x-c
(svn r1096) -Fix: [Network] PlayAs is now registered correctly
-Codewise: [Network] Cleaned some code, removed some comment, changed
some wrong comment
-Codewise: [Network] Cleaned some code, removed some comment, changed
some wrong comment
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 | #include "stdafx.h"
#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");
#if defined SECOND_DATA_DIR
// tries in the 2nd data directory
if (f == NULL) {
sprintf(buf, "%s%s", _path.second_data_dir, filename);
for(s=buf + strlen(_path.second_data_dir) - 1; *s != 0; s++)
*s = tolower(*s);
f = fopen(buf, "rb");
}
#endif
}
#endif
if (f == NULL)
error("Cannot open file '%s'", buf);
_fio.handles[slot] = f;
FioSeekToFile(slot << 24);
}
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