These are the stdio.asm changes that were present in the beta source code on Opus ][, but had been reverted in commit e3c0c962d4. As it turns out, the changes to stdio.asm were OK--the issue was simply that the definitions of stdin/stdout/stderr and the associated initialization code in vars.asm had not been updated to account for the new version of the FILE structure. That has now been done, allowing the changes to work properly.
This fixes#7.
This is what the standards require. Note that the mark is only set to EOF when actually writing to the underlying file, not merely buffering data to write later. This is consistent with the usual POSIX implementation using O_APPEND.
Tabs have been expanded to spaces in several files that use mainly spaces for indentation.
The files ctype.asm, stdio.asm, and string.asm consistently use tabs for indentation. The tabs in these files have been left alone, except that a few tabs between sentences in comments were changed to spaces. One space-indented line in stdio.asm was changed to use a tab.
The reverted changes relate mainly to adding a second character position in the putback buffer, but the library with those changes crashes on basic stdio operations like printing a string.
For now, this patch reverts stdio to a working, tested version. If the reverted changes are valuable, they can be fixed and then reintroduced later.
Stephen Heumann
Kelvin Sherlock
mikew50