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diskio use other filename buffer to avoid always having large buffer

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Irmen de Jong 2022-08-02 00:58:32 +02:00
parent 5b9576df4e
commit a38ddcb364
1 changed files with 17 additions and 18 deletions
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35
compiler/res/prog8lib/diskio.p8
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@ -109,15 +109,14 @@ io_error:
bool iteration_in_progress = false bool iteration_in_progress = false
ubyte @zp first_byte ubyte @zp first_byte
bool have_first_byte bool have_first_byte
str list_filename = "?" * 40 str list_filename = "?" * 50
const uword filenames_buf_size = 800
uword filenames_buffer = memory("filenames", filenames_buf_size, 0) ; note: if you know what you're doing (=doesn't call list_files()) your user code may reuse this buffer if required.
; ----- get a list of files (uses iteration functions internally) ----- ; ----- get a list of files (uses iteration functions internally) -----
sub list_files(ubyte drivenumber, uword pattern_ptr, uword name_ptrs, ubyte max_names) -> ubyte { sub list_files(ubyte drivenumber, uword pattern_ptr, uword name_ptrs, ubyte max_names) -> ubyte {
; -- fill the array 'name_ptrs' with (pointers to) the names of the files requested. Returns number of files. ; -- fill the array 'name_ptrs' with (pointers to) the names of the files requested. Returns number of files.
const uword filenames_buf_size = 800
uword filenames_buffer = memory("filenames", filenames_buf_size, 0)
uword buffer_start = filenames_buffer uword buffer_start = filenames_buffer
ubyte files_found = 0 ubyte files_found = 0
if lf_start_list(drivenumber, pattern_ptr) { if lf_start_list(drivenumber, pattern_ptr) {
@ -426,8 +425,8 @@ _end rts
sub status(ubyte drivenumber) -> uword { sub status(ubyte drivenumber) -> uword {
; -- retrieve the disk drive's current status message ; -- retrieve the disk drive's current status message
uword messageptr = filenames_buffer uword messageptr = &list_filename
c64.SETNAM(0, filenames_buffer) c64.SETNAM(0, list_filename)
c64.SETLFS(15, drivenumber, 15) c64.SETLFS(15, drivenumber, 15)
void c64.OPEN() ; open 15,8,15 void c64.OPEN() ; open 15,8,15
if_cs if_cs
@ -448,10 +447,10 @@ _end rts
done: done:
c64.CLRCHN() ; restore default i/o devices c64.CLRCHN() ; restore default i/o devices
c64.CLOSE(15) c64.CLOSE(15)
return filenames_buffer return list_filename
io_error: io_error:
void string.copy("?disk error", filenames_buffer) list_filename = "?disk error"
goto done goto done
} }
@ -553,10 +552,10 @@ io_error:
sub delete(ubyte drivenumber, uword filenameptr) { sub delete(ubyte drivenumber, uword filenameptr) {
; -- delete a file on the drive ; -- delete a file on the drive
filenames_buffer[0] = 's' list_filename[0] = 's'
filenames_buffer[1] = ':' list_filename[1] = ':'
ubyte flen = string.copy(filenameptr, filenames_buffer+2) ubyte flen = string.copy(filenameptr, &list_filename+2)
c64.SETNAM(flen+2, filenames_buffer) c64.SETNAM(flen+2, list_filename)
c64.SETLFS(1, drivenumber, 15) c64.SETLFS(1, drivenumber, 15)
void c64.OPEN() void c64.OPEN()
c64.CLRCHN() c64.CLRCHN()
@ -565,12 +564,12 @@ io_error:
sub rename(ubyte drivenumber, uword oldfileptr, uword newfileptr) { sub rename(ubyte drivenumber, uword oldfileptr, uword newfileptr) {
; -- rename a file on the drive ; -- rename a file on the drive
filenames_buffer[0] = 'r' list_filename[0] = 'r'
filenames_buffer[1] = ':' list_filename[1] = ':'
ubyte flen_new = string.copy(newfileptr, filenames_buffer+2) ubyte flen_new = string.copy(newfileptr, &list_filename+2)
filenames_buffer[flen_new+2] = '=' list_filename[flen_new+2] = '='
ubyte flen_old = string.copy(oldfileptr, filenames_buffer+3+flen_new) ubyte flen_old = string.copy(oldfileptr, &list_filename+3+flen_new)
c64.SETNAM(3+flen_new+flen_old, filenames_buffer) c64.SETNAM(3+flen_new+flen_old, list_filename)
c64.SETLFS(1, drivenumber, 15) c64.SETLFS(1, drivenumber, 15)
void c64.OPEN() void c64.OPEN()
c64.CLRCHN() c64.CLRCHN()