mesa/src/glsl/glcpp at 9ca5300b6e781150cec903c73cf5fd8e1deee2f1 - mesa

Files

T

Ian Romanick 9ca5300b6e glcpp: Generate an error for division by zero

When GCC encounters a division by zero in a preprocessor directive, it
generates an error.  Since the GLSL spec says that the GLSL
preprocessor behaves like the C preprocessor, we should generate that
same error.

It's worth noting that I cannot find any text in the C99 spec that
says this should be an error.  The only text that I can find is line 5
on page 82 (section 6.5.5 Multiplicative Opertors), which says,

    "The result of the / operator is the quotient from the division of
    the first operand by the second; the result of the % operator is
    the remainder. In both operations, if the value of the second
    operand is zero, the behavior is undefined."

Fixes 093-divide-by-zero.c test and bugzilla #32831.

NOTE: This is a candidate for the 7.9 and 7.10 branches.

2011-01-10 17:37:51 -08:00

tests

glcpp: Add test for recursive #define.

2011-01-04 16:39:19 -08:00

.gitignore

glcpp: Add generated source files.

2010-07-28 13:48:32 -07:00

glcpp-lex.c

r600g: implement texture_get_handle (needed for eglExportDRMImageMESA)

2010-11-08 13:44:54 -05:00

glcpp-lex.l

glcpp: Return NEWLINE token for newlines inside multi-line comments.

2010-10-21 00:13:33 -07:00

glcpp-parse.c

glcpp: Regenerate glcpp-parse.c

2011-01-10 17:28:24 -08:00

glcpp-parse.h

Refresh autogenerated glcpp parser.

2010-11-16 16:22:13 -08:00

glcpp-parse.y

glcpp: Generate an error for division by zero

2011-01-10 17:37:51 -08:00

glcpp.c

glsl: Slightly change the semantic of _LinkedShaders

2010-10-14 17:16:59 -07:00

glcpp.h

glsl: Define GL_ES preprocessor macro if API is OpenGL ES 2.0.

2010-09-07 17:30:37 -07:00

Makefile.am

glcpp: Remove xtalloc wrappers in favor of plain talloc.

2010-08-04 15:57:20 -07:00

pp.c

glsl: Define GL_ES preprocessor macro if API is OpenGL ES 2.0.

2010-09-07 17:30:37 -07:00

README

glcpp: Update README file (new specifications and fewer limitations).

2010-08-23 10:48:10 -07:00

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).