Initial commit

Author: ColonelThirtyTwo

.gitignore

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+__pycache__

gen/.gitignore

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+gl.E.h
+gl.lua

gen/cdef.py

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+
+import re
+import sys
+from collections import OrderedDict
+
+defines = OrderedDict()
+cdefs = []
+
+location_re = re.compile(r'^# \d+ "([^"]*)"')
+glpath_re = re.compile(r'^(?:.*[\\/]|\A)(gl|glu|glfw3|glext)\.h$')
+define_re = re.compile(r"^#define\s+([^\s]+)\s+([^\s]+)$")
+
+number_re = re.compile(r"^-?[0-9]+$")
+hex_re = re.compile(r"0x[0-9a-fA-F]+$")
+
+# Set of known #defines that we don't need to include
+INVALID_DEFINES = set(["GLAPI", "APIENTRY", "GLU_TESS_MAX_COORD", "gluErrorStringWIN", "WINGDIAPI", "CALLBACK"])
+
+if __name__ == "__main__":
+	in_gl = False
+	for line in sys.stdin:
+		# Ignore blank lines
+		line = line.strip()
+		if not line:
+			continue
+		
+		# Is this a preprocessor statement?
+		if line.startswith("#"):
+			
+			# Is this a location pragma?
+			location_match = location_re.match(line)
+			if location_match:
+				# If we are transitioning to a header we need to parse, set the flag
+				glpath_match = glpath_re.match(location_match.group(1))
+				in_gl = bool(glpath_match)
+				continue
+			
+			if in_gl:
+				# Is it a define?
+				define_match = define_re.match(line)
+				if define_match:
+					name, val = define_match.groups()
+					
+					if val in defines:
+						# Is this an alias of something we have already defined?
+						val = defines[val]
+					elif number_re.match(val) or hex_re.match(val):
+						# Is this a number?
+						# Store the define
+						defines[name] = val
+					elif val == "0xFFFFFFFFFFFFFFFFull":
+						# Fix for GL_TIMEOUT_IGNORED
+						defines[name] = val
+					elif val == "0xFFFFFFFFu":
+						# Fix for GL_INVALID_INDEX
+						defines[name] = "0xFFFFFFFF"
+					elif name not in INVALID_DEFINES:
+						# Incompatible define
+						print("Invalid define:", name, file=sys.stderr)
+					
+					continue
+		
+		# Otherwise just include it in the cdef
+		elif in_gl:
+			# Windows likes to add __stdcall__ to everything, but it isn't needed and is actually harmful when using under linux.
+			cdefs.append(line.replace(r'__attribute__((__stdcall__)) ', ''))
+	
+	# Output the file
+	#print("--[[ AUTOGENERATED FILE, DO NOT MODIFY ]]")
+	print("local glc; do require('ffi').cdef [[")
+	for line in cdefs:
+		print(line)
+	print("]]; glc = {")
+	
+	for k in defines.keys():
+		print("%s = %s," % ("['"+k+"']", defines[k]))
+	
+	print("} end")