gbdev/rgbds
1
0
Fork 0
mirror of https://github.com/gbdev/rgbds.git synced 2025-11-20 18:22:07 +00:00
Code Issues Packages Projects Releases Wiki Activity

Merge pull request #5 from vegard/lexer-fix-for-bentley

Browse Source 
Prevent lexer from reading beyond the end of the buffer
This commit is contained in:
Anthony J. Bentley
2012-12-01 22:46:21 -08:00
parent a397acd5ea 2dfd937d7f
commit 2f35d10373
1 changed files with 9 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
src/asm/lexer.c
View File

@@ -392,6 +392,15 @@ scanagain:
hash = 0; hash = 0;
s = pLexBuffer; s = pLexBuffer;
while (yyleng < nLexMaxLeng) { while (yyleng < nLexMaxLeng) {
/* XXX: Kludge warning! The dereference of s below
* may go beyond the end of the buffer. We use the
* following test to stop that from happening,
* without really understanding what the rest of
* the code is doing. This may not be the correct
* fix! */
if (!*s)
break;
yyleng += 1; yyleng += 1;
hash = ((hash << 1) + (toupper(*s))) % LEXHASHSIZE; hash = ((hash << 1) + (toupper(*s))) % LEXHASHSIZE;
s += 1; s += 1;