253 lines
6.8 KiB
Python
253 lines
6.8 KiB
Python
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# (C) Copyright IBM Corporation 2004, 2005
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# (C) Copyright Apple Inc. 2011
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# Copyright (C) 2015 Intel Corporation
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# All Rights Reserved.
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#
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# Permission is hereby granted, free of charge, to any person obtaining a
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# copy of this software and associated documentation files (the "Software"),
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# to deal in the Software without restriction, including without limitation
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# on the rights to use, copy, modify, merge, publish, distribute, sub
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# license, and/or sell copies of the Software, and to permit persons to whom
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# the Software is furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice (including the next
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# paragraph) shall be included in all copies or substantial portions of the
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# Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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# IBM AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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# IN THE SOFTWARE.
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#
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# Authors:
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# Jeremy Huddleston <jeremyhu@apple.com>
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#
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# Based on code ogiginally by:
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# Ian Romanick <idr@us.ibm.com>
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import argparse
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import license
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import gl_XML, glX_XML
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header = """/* GLXEXT is the define used in the xserver when the GLX extension is being
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* built. Hijack this to determine whether this file is being built for the
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* server or the client.
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*/
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#ifdef HAVE_DIX_CONFIG_H
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#include <dix-config.h>
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#endif
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#if (defined(GLXEXT) && defined(HAVE_BACKTRACE)) \\
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|| (!defined(GLXEXT) && defined(DEBUG) && defined(HAVE_EXECINFO_H))
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#define USE_BACKTRACE
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#endif
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#ifdef USE_BACKTRACE
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#include <execinfo.h>
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#endif
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#ifndef _WIN32
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#include <dlfcn.h>
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#endif
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "main/glheader.h"
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#include "glapi.h"
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#include "glapitable.h"
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#ifdef GLXEXT
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#include "os.h"
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#endif
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static void
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__glapi_gentable_NoOp(void) {
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const char *fstr = "Unknown";
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/* Silence potential GCC warning for some #ifdef paths.
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*/
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(void) fstr;
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#if defined(USE_BACKTRACE)
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#if !defined(GLXEXT)
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if (getenv("MESA_DEBUG") || getenv("LIBGL_DEBUG"))
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#endif
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{
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void *frames[2];
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if(backtrace(frames, 2) == 2) {
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Dl_info info;
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dladdr(frames[1], &info);
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if(info.dli_sname)
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fstr = info.dli_sname;
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}
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#if !defined(GLXEXT)
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fprintf(stderr, "Call to unimplemented API: %s\\n", fstr);
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#endif
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}
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#endif
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#if defined(GLXEXT)
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LogMessage(X_ERROR, "GLX: Call to unimplemented API: %s\\n", fstr);
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#endif
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}
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static void
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__glapi_gentable_set_remaining_noop(struct _glapi_table *disp) {
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GLuint entries = _glapi_get_dispatch_table_size();
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void **dispatch = (void **) disp;
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unsigned i;
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/* ISO C is annoying sometimes */
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union {_glapi_proc p; void *v;} p;
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p.p = __glapi_gentable_NoOp;
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for(i=0; i < entries; i++)
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if(dispatch[i] == NULL)
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dispatch[i] = p.v;
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}
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"""
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footer = """
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struct _glapi_table *
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_glapi_create_table_from_handle(void *handle, const char *symbol_prefix) {
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struct _glapi_table *disp = calloc(_glapi_get_dispatch_table_size(), sizeof(_glapi_proc));
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char symboln[512];
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if(!disp)
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return NULL;
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if(symbol_prefix == NULL)
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symbol_prefix = "";
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/* Note: This code relies on _glapi_table_func_names being sorted by the
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* entry point index of each function.
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*/
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for (int func_index = 0; func_index < GLAPI_TABLE_COUNT; ++func_index) {
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const char *name = _glapi_table_func_names[func_index];
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void ** procp = &((void **)disp)[func_index];
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snprintf(symboln, sizeof(symboln), \"%s%s\", symbol_prefix, name);
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#ifdef _WIN32
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*procp = GetProcAddress(handle, symboln);
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#else
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*procp = dlsym(handle, symboln);
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#endif
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}
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__glapi_gentable_set_remaining_noop(disp);
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return disp;
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}
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void
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_glapi_table_patch(struct _glapi_table *table, const char *name, void *wrapper)
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{
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for (int func_index = 0; func_index < GLAPI_TABLE_COUNT; ++func_index) {
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if (!strcmp(_glapi_table_func_names[func_index], name)) {
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((void **)table)[func_index] = wrapper;
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return;
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}
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}
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fprintf(stderr, "could not patch %s in dispatch table\\n", name);
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}
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"""
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class PrintCode(gl_XML.gl_print_base):
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def __init__(self):
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gl_XML.gl_print_base.__init__(self)
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self.name = "gl_gentable.py (from Mesa)"
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self.license = license.bsd_license_template % ( \
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"""Copyright (C) 1999-2001 Brian Paul All Rights Reserved.
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(C) Copyright IBM Corporation 2004, 2005
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(C) Copyright Apple Inc 2011""", "BRIAN PAUL, IBM")
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return
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def get_stack_size(self, f):
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size = 0
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for p in f.parameterIterator():
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if p.is_padding:
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continue
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size += p.get_stack_size()
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return size
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def printRealHeader(self):
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print(header)
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return
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def printRealFooter(self):
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print(footer)
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return
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def printBody(self, api):
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# Determine how many functions have a defined offset.
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func_count = 0
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for f in api.functions_by_name.values():
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if f.offset != -1:
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func_count += 1
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# Build the mapping from offset to function name.
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funcnames = [None] * func_count
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for f in api.functions_by_name.values():
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if f.offset != -1:
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if not (funcnames[f.offset] is None):
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raise Exception("Function table has more than one function with same offset (offset %d, func %s)" % (f.offset, f.name))
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funcnames[f.offset] = f.name
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# Check that the table has no gaps. We expect a function at every offset,
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# and the code which generates the table relies on this.
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for i in range(0, func_count):
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if funcnames[i] is None:
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raise Exception("Function table has no function at offset %d" % (i))
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print("#define GLAPI_TABLE_COUNT %d" % func_count)
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print("static const char * const _glapi_table_func_names[GLAPI_TABLE_COUNT] = {")
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for i in range(0, func_count):
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print(" /* %5d */ \"%s\"," % (i, funcnames[i]))
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print("};")
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return
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def _parser():
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"""Parse arguments and return a namespace object."""
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parser = argparse.ArgumentParser()
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parser.add_argument('-f',
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dest='filename',
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default='gl_API.xml',
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help='An XML file description of an API')
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return parser.parse_args()
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def main():
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"""Main function."""
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args = _parser()
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printer = PrintCode()
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api = gl_XML.parse_GL_API(args.filename, glX_XML.glx_item_factory())
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printer.Print(api)
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if __name__ == '__main__':
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main()
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