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#!/usr/bin/python2
# -*- Mode: Python; py-indent-offset: 8 -*-
# (C) Copyright Zack Rusin 2005
# All Rights Reserved.
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# on the rights to use, copy, modify, merge, publish, distribute, sub
# license, and/or sell copies of the Software, and to permit persons to whom
# the Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice (including the next
# paragraph) shall be included in all copies or substantial portions of the
# Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
# IBM AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.
#
# Authors:
# Zack Rusin <zack@kde.org>
import license
import gl_XML
import sys, getopt
class PrintGlEnums(gl_XML.FilterGLAPISpecBase):
name = "gl_enums.py (from Mesa)"
def __init__(self):
gl_XML.FilterGLAPISpecBase.__init__(self)
self.license = license.bsd_license_template % ( \
"""Copyright (C) 1999-2005 Brian Paul All Rights Reserved.""", "BRIAN PAUL")
self.enum_table = {}
def printRealHeader(self):
print '#include "glheader.h"'
print '#include "enums.h"'
print '#include "imports.h"'
print ''
print 'typedef struct {'
print ' size_t offset;'
print ' int n;'
print '} enum_elt;'
print ''
return
def printBody(self):
print """
#define Elements(x) sizeof(x)/sizeof(*x)
typedef int (*cfunc)(const void *, const void *);
/**
* Compare a key name to an element in the \c all_enums array.
*
* \c bsearch always passes the key as the first parameter and the pointer
* to the array element as the second parameter. We can elimiate some
* extra work by taking advantage of that fact.
*
* \param a Pointer to the desired enum name.
* \param b Pointer to an element of the \c all_enums array.
*/
static int compar_name( const char *a, const enum_elt *b )
{
return _mesa_strcmp( a, & enum_string_table[ b->offset ] );
}
/**
* Compare a key enum value to an element in the \c all_enums array.
*
* \c bsearch always passes the key as the first parameter and the pointer
* to the array element as the second parameter. We can elimiate some
* extra work by taking advantage of that fact.
*
* \param a Pointer to the desired enum name.
* \param b Pointer to an index into the \c all_enums array.
*/
static int compar_nr( const int *a, const unsigned *b )
{
return a[0] - all_enums[*b].n;
}
static char token_tmp[20];
const char *_mesa_lookup_enum_by_nr( int nr )
{
unsigned * i;
i = (unsigned *)bsearch( & nr, reduced_enums, Elements(reduced_enums),
sizeof(reduced_enums[0]), (cfunc) compar_nr );
if ( i != NULL ) {
return & enum_string_table[ all_enums[ *i ].offset ];
}
else {
/* this is not re-entrant safe, no big deal here */
_mesa_sprintf(token_tmp, "0x%x", nr);
return token_tmp;
}
}
int _mesa_lookup_enum_by_name( const char *symbol )
{
enum_elt * f = NULL;
if ( symbol != NULL ) {
f = (enum_elt *)bsearch( symbol, all_enums, Elements(all_enums),
sizeof( enum_elt ), (cfunc) compar_name );
}
return (f != NULL) ? f->n : -1;
}
"""
return
def printFunctions(self):
keys = self.enum_table.keys()
keys.sort()
name_table = []
enum_table = {}
for enum in keys:
low_pri = 9
for [name, pri] in self.enum_table[ enum ]:
name_table.append( [name, enum] )
if pri < low_pri:
low_pri = pri
enum_table[enum] = name
name_table.sort()
string_offsets = {}
i = 0;
print 'static const char enum_string_table[] = '
for [name, enum] in name_table:
print ' "%s\\0"' % (name)
string_offsets[ name ] = i
i += len(name) + 1
print ' ;'
print ''
print 'static const enum_elt all_enums[%u] =' % (len(name_table))
print '{'
for [name, enum] in name_table:
print ' { % 5u, 0x%08X }, /* %s */' % (string_offsets[name], enum, name)
print '};'
print ''
print 'static const unsigned reduced_enums[%u] =' % (len(keys))
print '{'
for enum in keys:
name = enum_table[ enum ]
if [name, enum] not in name_table:
print ' /* Error! %s, 0x%04x */ 0,' % (name, enum)
else:
i = name_table.index( [name, enum] )
print ' % 4u, /* %s */' % (i, name)
print '};'
self.printBody();
return
def append(self, object_type, obj):
if object_type == "enum":
if obj.value not in self.enum_table:
self.enum_table[ obj.value ] = []
# Prevent duplicate names in the enum table.
if obj.name not in self.enum_table[ obj.value ]:
# Calculate a "priority" for this enum name.
# When we lookup an enum by number, there may
# be many possible names, but only one can be
# returned. The priority is used by this
# script to select which name is the "best".
#
# Highest precedence is given to "core" name.
# ARB extension names have the next highest,
# followed by EXT extension names. Vendor
# extension names are the lowest.
if obj.category.startswith( "GL_VERSION_" ):
priority = 0
elif obj.category.startswith( "GL_ARB_" ):
priority = 1
elif obj.category.startswith( "GL_EXT_" ):
priority = 2
else:
priority = 3
self.enum_table[ obj.value ].append( [obj.name, priority] )
else:
gl_XML.FilterGLAPISpecBase.append(self, object_type, obj)
def show_usage():
print "Usage: %s [-f input_file_name]" % sys.argv[0]
sys.exit(1)
if __name__ == '__main__':
file_name = "gl_API.xml"
try:
(args, trail) = getopt.getopt(sys.argv[1:], "f:")
except Exception,e:
show_usage()
for (arg,val) in args:
if arg == "-f":
file_name = val
dh = PrintGlEnums()
gl_XML.parse_GL_API( dh, file_name )
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