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113 lines
4.3 KiB
C
113 lines
4.3 KiB
C
/*
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nitrofs.h - eris's wai ossum nitro filesystem device driver header
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Based on information found at http://frangoassado.org/ds/rom_spec.txt and from the #dsdev ppls
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Kallisti (K) 2008-01-26 All rights reversed.
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2008-05-19 v0.2 - New And Improved!! :DDD
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* fix'd the fseek SEEK_CUR issue (my fseek funct should not have returned a value :/)
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* also thx to wintermute's input realized:
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* if you dont give ndstool the -o wifilogo.bmp option it will run on emulators in gba mode
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* you then dont need the gba's LOADEROFFSET, so it was set to 0x000
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2008-05-21 v0.3 - newer and more improved
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* fixed some issues with ftell() (again was fseek's fault u_u;;)
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* fixed possible error in detecting sc.gba files when using dldi
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* readded support for .gba files in addition to .nds emu
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* added stat() support for completedness :)
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2008-05-30 v0.5.Turbo - major speed improvement
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* This version uses a single filehandle to access the .nds file when not in GBA mode
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improving the speed it takes to open a .nds file by around 106ms. This is great for
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situations requiring reading alot of seperate small files. However it does take a little
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bit longer when reading from multiple files simultainously
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(around 122ms over 10,327 0x100 byte reads between 2 files).
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2008-06-09
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* Fixed bug with SEEK_END where it wouldnt utilize the submitted position..
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(now can fseek(f,-128,SEEK_END) to read from end of file :D)
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2008-06-18 v0.6.Turbo - . and .. :D
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* Today i have added full "." and ".." support.
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dirnext() will return . and .. first, and all relevent operations will
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support . and .. in pathnames.
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2018-09-05 v0.9 - modernize devoptab (by RonnChyran)
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* Updated for libsysbase change in devkitARM r46 and above.
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*/
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#ifndef NITROFS_H
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#define NITROFS_H
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#include <sys/dir.h>
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#include <sys/iosupport.h>
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#include <stdio.h>
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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int nitroFSInit(const char *ndsfile);
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DIR_ITER *nitroFSDirOpen(struct _reent *r, DIR_ITER *dirState, const char *path);
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int nitroDirReset(struct _reent *r, DIR_ITER *dirState);
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int nitroFSDirNext(struct _reent *r, DIR_ITER *dirState, char *filename, struct stat *st);
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int nitroFSDirClose(struct _reent *r, DIR_ITER *dirState);
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int nitroFSOpen(struct _reent *r, void *fileStruct, const char *path, int flags, int mode);
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int nitroFSClose(struct _reent *r, void *fd);
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ssize_t nitroFSRead(struct _reent *r, void *fd, char *ptr, size_t len);
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off_t nitroFSSeek(struct _reent *r, void *fd, off_t pos, int dir);
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int nitroFSFstat(struct _reent *r, void *fd, struct stat *st);
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int nitroFSstat(struct _reent *r, const char *file, struct stat *st);
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int nitroFSChdir(struct _reent *r, const char *name);
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#define LOADERSTR "PASS" //look for this
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#define LOADERSTROFFSET 0xac
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#define LOADEROFFSET 0x0200
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#define FNTOFFSET 0x40
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#define FATOFFSET 0x48
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#define NITRONAMELENMAX 0x80 //max file name is 127 +1 for zero byte :D
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#define NITROMAXPATHLEN 0x100 //256 bytes enuff?
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#define NITROROOT 0xf000 //root entry_file_id
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#define NITRODIRMASK 0x0fff //remove leading 0xf
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#define NITROISDIR 0x80 //mask to indicate this name entry is a dir, other 7 bits = name length
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//Directory filename subtable entry structure
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struct ROM_FNTDir
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{
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u32 entry_start;
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u16 entry_file_id;
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u16 parent_id;
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};
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//Yo, dis table is fat (describes the structures
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struct ROM_FAT
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{
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u32 top; //start of file in rom image
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u32 bottom; //end of file in rom image
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};
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struct nitroFSStruct
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{
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off_t pos; //where in the file am i?
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off_t start; //where in the rom this file starts
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off_t end; //where in the rom this file ends
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};
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struct nitroDIRStruct
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{
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off_t pos; //where in the file am i?
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off_t namepos; //ptr to next name to lookup in list
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struct ROM_FAT romfat;
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u16 entry_id; //which entry this is (for files only) incremented with each new file in dir?
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u16 dir_id; //which directory entry this is.. used ofc for dirs only
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u16 cur_dir_id; //which directory entry we are using
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u16 parent_id; //who is the parent of the current directory (this can be used to easily ../ )
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u8 spc; //system path count.. used by dirnext, when 0=./ 1=../ >=2 actual dirs
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};
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#ifdef __cplusplus
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}
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#endif
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#endif |