Apple-2gs-SW/ORCALib
1
0
Fork 0
mirror of https://github.com/byteworksinc/ORCALib.git synced 2025-02-07 04:30:31 +00:00
Code Issues Projects Releases Wiki Activity

Ensure that strtok returns NULL after reaching the end of the string.

Browse Source 
It had been doing a null pointer dereference and effectively treating memory locations starting from 0 as the continuation of the string, potentially producing inappropriate results depending on what they contained.
This commit is contained in:
Stephen Heumann 2020-01-21 17:12:54 -06:00
parent 887d66d537
commit d89096236e
1 changed files with 4 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
string.asm
View File

@ -1730,15 +1730,17 @@ lb3 lda isp s := internal state pointer
ldx isp+2
sta s
stx s+2
ora s+2 check if already at end of string
beq lb4a
lb4 anop endif
lda [s] if we are at the end of the string then
and #$00FF
bne lb5
stz set return NULL
stz set+2
stz isp set the isp to NULL
stz isp+2
lb4a stz set return NULL
stz set+2
bra lb10 else
lb5 lda [s] scan to the 1st char not in the set
and #$00FF