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962a1c07b4
Previously, we were only supporting line-continuation backslash characters within lines of pre-processor directives, (as per the specification). With OpenGL 4.2 and GLES3, line continuations are now supported anywhere within a shader. While changing this, also fix a bug where the preprocessor was ignoring line continuation characters when a line ended in multiple backslash characters. The new code is also more efficient than the old. Previously, we would perform a ralloc copy at each newline. We now perform copies only at each occurrence of a line-continuation. Reviewed-by: Kenneth Graunke <kenneth@whitecape.org> |
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| tests | ||
| .gitignore | ||
| glcpp-lex.l | ||
| glcpp-parse.y | ||
| glcpp.c | ||
| glcpp.h | ||
| Makefile.am | ||
| pp.c | ||
| 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 handled according to the GLSL specification and will not appear in the output. Known limitations ----------------- 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).