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fseek: do not clear read/write flags for read-only/write-only streams.

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This maintains the invariant that these flags stay set to reflect the setting of the stream as read-only or write-only, allowing code elsewhere to behave appropriately based on that.
This commit is contained in:
Stephen Heumann 2022-07-03 20:27:19 -05:00
parent 89b501f259
commit 219e4352a0
1 changed files with 7 additions and 4 deletions
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11
stdio.asm
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@ -1916,10 +1916,13 @@ lb5 move4 offset,spPosition
OSSet_Mark sp
bcs erEIO
lb6 ldy #FILE_flag clear the EOF , READ, WRITE flags
lda #$FFFF-_IOEOF-_IOREAD-_IOWRT
and [stream],Y
sta [stream],Y
lb6 ldy #FILE_flag clear the EOF flag
lda [stream],Y
and #$FFFF-_IOEOF
bit #_IORW if file is open for reading and writing
beq lb6a
and #$FFFF-_IOREAD-_IOWRT clear the READ and WRITE flags
lb6a sta [stream],Y
ldy #FILE_cnt clear the character count
lda #0
sta [stream],Y