mirror of
https://github.com/irmen/prog8.git
synced 2024-12-29 19:31:40 +00:00
223 lines
8.2 KiB
Lua
223 lines
8.2 KiB
Lua
; file I/O routines. (partially implemented)
|
|
|
|
%import textio
|
|
%import syslib
|
|
|
|
diskio {
|
|
%option no_symbol_prefixing, ignore_unused
|
|
|
|
sub directory() -> bool {
|
|
; -- Prints the directory contents to the screen. Returns success.
|
|
%ir {{
|
|
loadm.w r65534,diskio.load.filenameptr
|
|
loadm.w r65535,diskio.load.address_override
|
|
syscall 48 (): r0.b
|
|
returnr.b r0
|
|
}}
|
|
}
|
|
|
|
sub list_filenames(uword pattern_ptr, uword filenames_buffer, uword filenames_buf_size) -> ubyte {
|
|
; -- fill the provided buffer with the names of the files on the disk (until buffer is full).
|
|
; Files in the buffer are separated by a 0 byte. You can provide an optional pattern to match against.
|
|
; After the last filename one additional 0 byte is placed to indicate the end of the list.
|
|
; Returns number of files (it skips 'dir' entries i.e. subdirectories).
|
|
; Also sets carry on exit: Carry clear = all files returned, Carry set = directory has more files that didn't fit in the buffer.
|
|
txt.print("@TODO: list_filenames\n")
|
|
sys.clear_carry()
|
|
return 0
|
|
}
|
|
|
|
; ----- iterative file lister functions (uses the read io channel) -----
|
|
|
|
sub lf_start_list(uword pattern_ptr) -> bool {
|
|
; -- start an iterative file listing with optional pattern matching.
|
|
; note: only a single iteration loop can be active at a time!
|
|
txt.print("@TODO: lf_start_list\n")
|
|
return false
|
|
}
|
|
|
|
sub lf_next_entry() -> bool {
|
|
; -- retrieve the next entry from an iterative file listing session.
|
|
; results will be found in list_blocks, list_filename, and list_filetype.
|
|
; if it returns false though, there are no more entries (or an error occurred).
|
|
txt.print("@TODO: lf_next_entry\n")
|
|
return false
|
|
}
|
|
|
|
sub lf_end_list() {
|
|
txt.print("@TODO: lf_end_list\n")
|
|
}
|
|
|
|
|
|
; ----- iterative file loader functions (uses the input io channel) -----
|
|
|
|
sub f_open(uword filenameptr) -> bool {
|
|
; -- open a file for iterative reading with f_read
|
|
; note: only a single iteration loop can be active at a time!
|
|
; Returns true if the file is successfully opened and readable.
|
|
; No need to check status(), unlike f_open_w() !
|
|
; NOTE: the default input isn't yet set to this logical file, you must use reset_read_channel() to do this,
|
|
; if you're going to read from it yourself instead of using f_read()!
|
|
|
|
txt.print("@TODO: f_open\n")
|
|
return false
|
|
}
|
|
|
|
sub f_read(uword bufferpointer, uword num_bytes) -> uword {
|
|
; -- read from the currently open file, up to the given number of bytes.
|
|
; returns the actual number of bytes read. (checks for End-of-file and error conditions)
|
|
txt.print("@TODO: f_read\n")
|
|
return 0
|
|
}
|
|
|
|
sub f_read_all(uword bufferpointer) -> uword {
|
|
; -- read the full contents of the file, returns number of bytes read.
|
|
; It is assumed the file size is less than 64 K.
|
|
txt.print("@TODO: f_read_all\n")
|
|
return 0
|
|
}
|
|
|
|
sub f_readline(uword bufptr) -> ubyte {
|
|
; Routine to read text lines from a text file. Lines must be less than 255 characters.
|
|
; Reads characters from the input file UNTIL a newline or return character (or EOF).
|
|
; The line read will be 0-terminated in the buffer (and not contain the end of line character).
|
|
; The length of the line is returned in Y. Note that an empty line is okay and is length 0!
|
|
; This routine is not able here to return the status as well in a secondary return value, so you have to do that yourself.
|
|
txt.print("@TODO: f_readline\n")
|
|
return 0
|
|
}
|
|
|
|
sub f_close() {
|
|
; -- end an iterative file loading session (close channels).
|
|
txt.print("@TODO: f_close\n")
|
|
}
|
|
|
|
|
|
; ----- iterative file writing functions (uses write io channel) -----
|
|
|
|
sub f_open_w(uword filenameptr) -> bool {
|
|
; -- open a file for iterative writing with f_write
|
|
; WARNING: returns true if the open command was received by the device,
|
|
; but this can still mean the file wasn't successfully opened for writing!
|
|
; (for example, if it already exists). This is different than f_open()!
|
|
; To be 100% sure if this call was successful, you have to use status()
|
|
; and check the drive's status message!
|
|
txt.print("@TODO: f_open_w\n")
|
|
return false
|
|
}
|
|
|
|
sub f_write(uword bufferpointer, uword num_bytes) -> bool {
|
|
; -- write the given number of bytes to the currently open file
|
|
; you can call this multiple times to append more data
|
|
txt.print("@TODO: f_write\n")
|
|
return false
|
|
}
|
|
|
|
sub f_close_w() {
|
|
; -- end an iterative file writing session (close channels).
|
|
txt.print("@TODO: f_close_w\n")
|
|
}
|
|
|
|
|
|
; ---- other functions ----
|
|
|
|
sub chdir(str path) {
|
|
; -- change current directory.
|
|
txt.print("@TODO: chdir\n")
|
|
}
|
|
|
|
sub mkdir(str name) {
|
|
; -- make a new subdirectory.
|
|
txt.print("@TODO: mkdir\n")
|
|
}
|
|
|
|
sub rmdir(str name) {
|
|
; -- remove a subdirectory.
|
|
txt.print("@TODO: rmdir\n")
|
|
}
|
|
|
|
sub curdir() -> uword {
|
|
; return current directory name or 0 if error
|
|
txt.print("@TODO: curdir\n")
|
|
return 0
|
|
}
|
|
|
|
sub status() -> str {
|
|
; -- retrieve the disk drive's current status message
|
|
return "unknown"
|
|
}
|
|
|
|
sub status_code() -> ubyte {
|
|
; -- return status code instead of whole CBM-DOS status string. (in this case always 255, which means 'unable to return sensible value')
|
|
return 255
|
|
}
|
|
|
|
|
|
sub save(uword filenameptr, uword start_address, uword savesize) -> bool {
|
|
%ir {{
|
|
load.b r65532,0
|
|
loadm.w r65533,diskio.save.filenameptr
|
|
loadm.w r65534,diskio.save.start_address
|
|
loadm.w r65535,diskio.save.savesize
|
|
syscall 45 (r65532.b, r65533.w, r65534.w, r65535.w): r0.b
|
|
returnr.b r0
|
|
}}
|
|
}
|
|
|
|
; like save() but omits the 2 byte prg header.
|
|
sub save_raw(uword filenameptr, uword startaddress, uword savesize) -> bool {
|
|
%ir {{
|
|
load.b r65532,1
|
|
loadm.w r65533,diskio.save.filenameptr
|
|
loadm.w r65534,diskio.save.start_address
|
|
loadm.w r65535,diskio.save.savesize
|
|
syscall 45 (r65532.b, r65533.w, r65534.w, r65535.w): r0.b
|
|
returnr.b r0
|
|
}}
|
|
}
|
|
|
|
; Use kernal LOAD routine to load the given program file in memory.
|
|
; This is similar to Basic's LOAD "filename",drive / LOAD "filename",drive,1
|
|
; If you don't give an address_override, the location in memory is taken from the 2-byte file header.
|
|
; If you specify a custom address_override, the first 2 bytes in the file are ignored
|
|
; and the rest is loaded at the given location in memory.
|
|
; Returns the end load address+1 if successful or 0 if a load error occurred.
|
|
sub load(uword filenameptr, uword address_override) -> uword {
|
|
%ir {{
|
|
loadm.w r65534,diskio.load.filenameptr
|
|
loadm.w r65535,diskio.load.address_override
|
|
syscall 43 (r65534.w, r65535.w): r0.w
|
|
returnr.w r0
|
|
}}
|
|
}
|
|
|
|
; Identical to load(), but DOES INCLUDE the first 2 bytes in the file.
|
|
; No program header is assumed in the file. Everything is loaded.
|
|
; See comments on load() for more details.
|
|
sub load_raw(uword filenameptr, uword start_address) -> uword {
|
|
%ir {{
|
|
loadm.w r65534,diskio.load_raw.filenameptr
|
|
loadm.w r65535,diskio.load_raw.start_address
|
|
syscall 44 (r65534.w, r65535.w): r0.w
|
|
returnr.w r0
|
|
}}
|
|
}
|
|
|
|
sub delete(uword filenameptr) {
|
|
; -- delete a file on the drive
|
|
%ir {{
|
|
loadm.w r65535,diskio.delete.filenameptr
|
|
syscall 46 (r65535.w)
|
|
}}
|
|
}
|
|
|
|
sub rename(uword oldfileptr, uword newfileptr) {
|
|
; -- rename a file on the drive
|
|
%ir {{
|
|
loadm.w r65534,diskio.rename.oldfileptr
|
|
loadm.w r65535,diskio.rename.newfileptr
|
|
syscall 47 (r65534.w, r65535.w)
|
|
}}
|
|
}
|
|
}
|