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mesa/src/glsl/glcpp
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Chad Versace fd1252ab67 glcpp: Raise error when modulus is zero 
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.
2011-02-02 10:19:51 -08:00
..
tests Revert "glcpp: Demote "macro redefined" from an error to a warning" 2011-01-29 08:21:05 +10:00
.gitignore glcpp: Add generated source files. 2010-07-28 13:48:32 -07:00
glcpp-lex.c Convert everything from the talloc API to the ralloc API. 2011-01-31 10:17:09 -08:00
glcpp-lex.l Convert everything from the talloc API to the ralloc API. 2011-01-31 10:17:09 -08:00
glcpp-parse.c glsl: regerated files 2011-01-31 14:09:24 -07:00
glcpp-parse.h glsl: regerated files 2011-01-31 14:09:24 -07:00
glcpp-parse.y glcpp: Raise error when modulus is zero 2011-02-02 10:19:51 -08:00
glcpp.c Convert everything from the talloc API to the ralloc API. 2011-01-31 10:17:09 -08:00
glcpp.h Convert everything from the talloc API to the ralloc API. 2011-01-31 10:17:09 -08:00
Makefile.am glcpp: Remove xtalloc wrappers in favor of plain talloc. 2010-08-04 15:57:20 -07:00
pp.c Convert everything from the talloc API to the ralloc API. 2011-01-31 10:17:09 -08:00
README Revert "glcpp: Demote "macro redefined" from an error to a warning" 2011-01-29 08:21:05 +10:00

README 

glcpp -- GLSL "C" preprocessor

This is a simple preprocessor designed to provide the preprocessing
needs of the GLSL language. The requirements for this preprocessor are
specified in the GLSL 1.30 specification availble from:

http://www.opengl.org/registry/doc/GLSLangSpec.Full.1.30.10.pdf

This specification is not precise on some semantics, (for example,
#define and #if), defining these merely "as is standard for C++
preprocessors". To fill in these details, I've been using a draft of
the C99 standard as available from:

http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1256.pdf

Any downstream compiler accepting output from glcpp should be prepared
to encounter and deal with the following preprocessor macros:

	#line
	#pragma
	#extension

All other macros will be handles according to the GLSL specification
and will not appear in the output.

Known limitations
-----------------
The __LINE__ and __FILE__ macros are not yet supported.

A file that ends with a function-like macro name as the last
non-whitespace token will result in a parse error, (where it should be
passed through as is).