- separated the lexer into multiple functions so it is more readable
- fixed issue with long label names in macro arguments
- added error checking code to prevent buffer overflows
On Linux, valgrind complains about the overflow like this:
Pass 1...
==20054== Invalid read of size 1
==20054== at 0x406CDA: yylex (lexer.c:396)
==20054== by 0x40207C: yyparse (asmy.c:2921)
==20054== by 0x4086AF: main (main.c:351)
==20054== Address 0x503a102 is 0 bytes after a block of size 23,538 alloc'd
==20054== at 0x402994D: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==20054== by 0x406411: yy_create_buffer (lexer.c:147)
==20054== by 0x404FE3: fstk_RunInclude (fstack.c:243)
==20054== by 0x4025F5: yyparse (asmy.y:744)
==20054== by 0x4086AF: main (main.c:351)
==20054==
This is a bit of a crude fix which simply exits the hashing loop when
we reach the end of the string. We should probably do some kind of
length calculation on the buffer instead.
Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com>
Merging lai's source with this one is very irritating because
they have different indentation styles. I couldn't find what profile
vegard used for his version, so I used these flags (which should bring
the source close to KNF):
-bap
-br
-ce
-ci4
-cli0
-d0
-di0
-i8
-ip
-l79
-nbc
-ncdb
-ndj
-ei
-nfc1
-nlp
-npcs
-psl
-sc
-sob
