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glcpp: Raise error when modulus is zero

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For example, this now raises an error:
   #define XXX 1 / 0

Fixes bug: https://bugs.freedesktop.org//show_bug.cgi?id=33507
Fixes Piglit test: spec/glsl-1.10/preprocessor/modulus-by-zero.vert

NOTE: This is a candidate for the 7.9 and 7.10 branches.
This commit is contained in:
Chad Versace 2011-02-02 10:15:19 -08:00
parent e7c1f058d1
commit fd1252ab67
1 changed files with 6 additions and 1 deletions
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7
src/glsl/glcpp/glcpp-parse.y
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@ -388,7 +388,12 @@ expression:
$$ = $1 + $3; $$ = $1 + $3;
} }
| expression '%' expression { | expression '%' expression {
$$ = $1 % $3; if ($3 == 0) {
yyerror (& @1, parser,
"zero modulus in preprocessor directive");
} else {
$$ = $1 % $3;
}
} }
| expression '/' expression { | expression '/' expression {
if ($3 == 0) { if ($3 == 0) {