Commit Graph

15 Commits

Author SHA1 Message Date
Virgil Dupras
c18d42f08b fs: further adjust to previous blkdev refactoring
Previous refacoring broke all seek/tell within fs. fs handles now lost
the responsibility to keep track of current position. It's blkdev's job.
2019-06-04 20:45:01 -04:00
Virgil Dupras
ae028e3a86 blockdev: make implementors "random access"
This huge refactoring remove the Seek and Tell routine from blockdev
implementation requirements and change GetC and PutC's API so that they
take an address to read and write (through HL/DE) at each call.

The "PTR" approach in blockdev implementation was very redundant from
device to device and it made more sense to generalize. It's possible
that future device aren't "random access", but we'll be able to add more
device types later.

Another important change in this commit is that the "blockdev handle" is
now opaque. Previously, consumers of the API would happily call routines
directly from one of the 4 offsets. We can't do that any more. This
makes the API more solid for future improvements.

This change forced me to change a lot of things in fs, but overall,
things are now simpler. No more `FS_PTR`: the "device handle" now holds
the active pointer.

Lots, lots of changes, but it also feels a lot cleaner and solid.
2019-06-04 15:36:20 -04:00
Virgil Dupras
7c191fd978 fs: standardize file handle routine argument to IX
Using HL/DE was awkward and error-prone.
2019-05-31 14:28:06 -04:00
Virgil Dupras
2c80924df9 zasm: indicate include lineno in errors 2019-05-28 09:57:29 -04:00
Virgil Dupras
8def8e7c38 zasm: add lineno to error reports
For now, top-level only
2019-05-27 20:52:40 -04:00
Virgil Dupras
ad7428e471 zasm: make io unit handle PC and output suppression 2019-05-17 14:58:16 -04:00
Virgil Dupras
7083116379 zasm: remove JUMP_ prefixes
They serve no purpose and make the code less flexible.
2019-05-17 09:50:11 -04:00
Virgil Dupras
2f0dd5d668 zasm: iiiiiiiincluuuuuuudes!!1! 2019-05-16 21:15:00 -04:00
Virgil Dupras
0ae91e55ec zasm: big local symbols overhaul 2019-05-16 08:26:00 -04:00
Virgil Dupras
e9244b80ee zasm: big I/O overhaul
Instead of buffering input in memory one line at a time, we go in "just
in time" mode and always read contents directly from I/O, without
buffering.

It forces us to implement a `ioPutback` scheme, but on the other hand it
greatly simplifies cases where multiple tokens are on the same line
(when a label is directly followed by an instruction).

The end result feels much more solid and less hackish.
2019-05-16 07:53:42 -04:00
Virgil Dupras
fa28d64278 zasm: change ioRewind to ioSeek
Will need it soon.
2019-05-15 13:41:56 -04:00
Virgil Dupras
b0218349ff zasm: support multiple instructions on single line 2019-05-14 16:45:56 -04:00
Virgil Dupras
c239ec7dea zasm: read input in two passes 2019-05-10 20:32:05 -04:00
Virgil Dupras
34ee91a0d7 zasm: use blkdev IDs as input and output
This will soon allow use to seek and tell on input, which is necessary
for a second pass which is necessary for forward symbol references.

This require making `blkSel` a bit more flexible. Rather than having one
global selected blkdev, each app can select its own, in its own memory
space.
2019-05-10 19:33:34 -04:00
Virgil Dupras
d34aff67bb zasm: Read from and write to streams instead of memory 2019-05-09 15:36:03 -04:00