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#include "global.h"
struct File
{
char *name;
u8 *data;
};
struct OpenedFile
{
struct File *file;
u8 *data;
};
struct FileArchive
{
char magic[8];
s32 count;
struct File *entries;
};
struct SiroArchive
{
u32 magic;
u8 *data;
};
extern struct OpenedFile gFileCache[64];
extern u32 gFileCacheCursorPosition;
extern u32 gUnknown_202D2A4;
extern int sprintf(char *, const char *, ...);
u8 *GetSiroPtr(struct OpenedFile *);
void NDS_DecompressRLE(void *);
void InitFileSystem(void)
{
s32 i;
for (i = 0; i < 64; i++)
{
gFileCache[i].file = NULL;
gFileCache[i].data = NULL;
}
gFileCacheCursorPosition = 0;
gUnknown_202D2A4 = 1;
}
u32 sub_800A8F8(u32 value)
{
u32 oldValue = gUnknown_202D2A4;
gUnknown_202D2A4 = value;
return oldValue;
}
struct OpenedFile *OpenFile(char *filename, struct FileArchive *arc)
{
char buffer[0x12C];
s32 left, right;
s32 cursor;
s32 i;
u32 magic = 0;
bool32 magicFound;
struct File *entries;
struct File *file;
magic = strcmp(arc->magic, "pksdir0") != 0;
magicFound = 0;
if (!(bool8)magic)
magicFound = 1;
if (!magicFound)
return NULL;
entries = arc->entries;
left = 0;
right = arc->count - 1;
while (left < right)
{
s32 mid = (left + right) / 2;
int result = strcmp(entries[mid].name, filename);
if (result == 0)
{
left = mid;
break;
}
else if (result < 0)
{
left = mid + 1;
}
else
{
right = mid;
}
}
file = &entries[left];
if (strcmp(file->name, filename))
{
sprintf(buffer, "not find file [%s]\n", filename);
return NULL;
}
cursor = gFileCacheCursorPosition;
for (i = 0; i < 64; i++)
{
cursor++;
if (cursor > 63)
cursor = 0;
if (!gFileCache[cursor].file)
{
gFileCache[cursor].file = file;
gFileCache[cursor].data = NULL;
return &gFileCache[cursor];
}
}
return NULL;
}
static u8 *_GetFileDataPtr(struct OpenedFile *openedFile)
{
openedFile->data = openedFile->file->data;
return openedFile->data;
}
u8 *GetFileDataPtr(struct OpenedFile *openedFile, int unused)
{
_GetFileDataPtr(openedFile);
return GetSiroPtr(openedFile);
}
struct OpenedFile *OpenFileAndGetFileDataPtr(char *filename, struct FileArchive *arc)
{
struct OpenedFile *openedFile = OpenFile(filename, arc);
if (openedFile)
GetFileDataPtr(openedFile, 0);
return openedFile;
}
struct OpenedFile *Call_OpenFileAndGetFileDataPtr(char *filename, struct FileArchive *arc)
{
return OpenFileAndGetFileDataPtr(filename, arc);
}
void CloseFile(struct OpenedFile *openedFile)
{
s32 i;
for (i = 0; i < 64; i++)
{
if (&gFileCache[i] == openedFile)
{
gFileCache[i].file = NULL;
gFileCache[i].data = NULL;
gFileCacheCursorPosition = i;
return;
}
}
}
u8 *GetSiroPtr(struct OpenedFile *openedFile)
{
struct SiroArchive *siro = (struct SiroArchive *)openedFile->data;
if (siro->magic == 0x30524953)
{
NDS_DecompressRLE(openedFile->data);
}
else if (siro->magic != 0x4F524953)
{
return openedFile->data;
}
openedFile->data = siro->data;
return openedFile->data;
}
void *UnusedGetSir0Ptr(struct SiroArchive *siro)
{
if (siro->magic != 0x30524953)
return siro;
NDS_DecompressRLE(siro);
return siro->data;
}
void NDS_DecompressRLE(void *unused)
{
}
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