src/mesa/glapi/gl_procs.py

   1 #!/usr/bin/python2
   2
   3 # (C) Copyright IBM Corporation 2004
   4 # All Rights Reserved.
   5 #
   6 # Permission is hereby granted, free of charge, to any person obtaining a
   7 # copy of this software and associated documentation files (the "Software"),
   8 # to deal in the Software without restriction, including without limitation
   9 # on the rights to use, copy, modify, merge, publish, distribute, sub
  10 # license, and/or sell copies of the Software, and to permit persons to whom
  11 # the Software is furnished to do so, subject to the following conditions:
  12 #
  13 # The above copyright notice and this permission notice (including the next
  14 # paragraph) shall be included in all copies or substantial portions of the
  15 # Software.
  16 #
  17 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19 # FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
  20 # IBM AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  22 # FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  23 # IN THE SOFTWARE.
  24 #
  25 # Authors:
  26 #    Ian Romanick <idr@us.ibm.com>
  27
  28 from xml.sax import saxutils
  29 from xml.sax import make_parser
  30 from xml.sax.handler import feature_namespaces
  31
  32 import license
  33 import gl_XML
  34 import sys, getopt
  35
  36 class PrintGlProcs(gl_XML.FilterGLAPISpecBase):
  37         name = "gl_procs.py (from Mesa)"
  38
  39         def __init__(self, long_strings):
  40                 self.long_strings = long_strings
  41                 gl_XML.FilterGLAPISpecBase.__init__(self)
  42                 self.license = license.bsd_license_template % ( \
  43 """Copyright (C) 1999-2001  Brian Paul   All Rights Reserved.
  44 (C) Copyright IBM Corporation 2004""", "BRIAN PAUL, IBM")
  45
  46
  47         def printRealHeader(self):
  48                 print '/* This file is only included by glapi.c and is used for'
  49                 print ' * the GetProcAddress() function'
  50                 print ' */'
  51                 print ''
  52                 print 'typedef struct {'
  53                 print '    int Name_offset;'
  54                 print '#ifdef NEED_FUNCTION_POINTER'
  55                 print '    void * Address;'
  56                 print '#endif'
  57                 print '    unsigned int Offset;'
  58                 print '} glprocs_table_t;'
  59                 print ''
  60                 print '#ifdef NEED_FUNCTION_POINTER'
  61                 print '#  define NAME_FUNC_OFFSET(n,f,o) { n , (void *) f , o }'
  62                 print '#else'
  63                 print '#  define NAME_FUNC_OFFSET(n,f,o) { n , o }'
  64                 print '#endif'
  65                 print ''
  66                 return
  67
  68         def printRealFooter(self):
  69                 print ''
  70                 print '#undef NAME_FUNC_OFFSET'
  71                 return
  72
  73         def printFunctionString(self, f):
  74                 if self.long_strings:
  75                         print '    "gl%s\\0"' % (f.name)
  76                 else:
  77                         print "    'g','l',",
  78                         for c in f.name:
  79                                 print "'%s'," % (c),
  80
  81                         print "'\\0',"
  82
  83         def printFunctionOffset(self, f, offset_of_name):
  84                 print '    NAME_FUNC_OFFSET( % 5u, gl%s, _gloffset_%s ),' % (offset_of_name, f.name, f.real_name)
  85
  86
  87         def printFunctions(self):
  88                 print ''
  89                 if self.long_strings:
  90                         print 'static const char gl_string_table[] ='
  91                 else:
  92                         print 'static const char gl_string_table[] = {'
  93
  94                 keys = self.functions.keys()
  95                 keys.sort()
  96                 for k in keys:
  97                         if k < 0: continue
  98                         self.printFunctionString(self.functions[k])
  99
 100                 keys.reverse()
 101                 for k in keys:
 102                         if k >= -1: continue
 103                         self.printFunctionString(self.functions[k])
 104
 105                 if self.long_strings:
 106                         print '    ;'
 107                 else:
 108                         print '};'
 109
 110                 print ''
 111                 print 'static const glprocs_table_t static_functions[] = {'
 112
 113                 keys = self.functions.keys()
 114                 keys.sort()
 115                 base_offset = 0
 116                 for k in keys:
 117                         if k < 0: continue
 118                         self.printFunctionOffset(self.functions[k], base_offset)
 119
 120                         # The length of the function's name, plus 2 for "gl",
 121                         # plus 1 for the NUL.
 122
 123                         base_offset += len(self.functions[k].name) + 3
 124
 125                 keys.reverse()
 126                 for k in keys:
 127                         if k >= -1: continue
 128                         self.printFunctionOffset(self.functions[k], base_offset)
 129
 130                         # The length of the function's name, plus 2 for "gl",
 131                         # plus 1 for the NUL.
 132
 133                         base_offset += len(self.functions[k].name) + 3
 134
 135                 print '    NAME_FUNC_OFFSET( -1, NULL, -1 )'
 136                 print '};'
 137                 return
 138
 139
 140 def show_usage():
 141         print "Usage: %s [-f input_file_name] [-m mode]" % sys.argv[0]
 142         print "mode can be one of:"
 143         print "    long  - Create code for compilers that can handle very "
 144         print "            long string constants. (default)"
 145         print "    short - Create code for compilers that can only handle "
 146         print "            ANSI C89 string constants."
 147         sys.exit(1)
 148
 149 if __name__ == '__main__':
 150         file_name = "gl_API.xml"
 151
 152         try:
 153                 (args, trail) = getopt.getopt(sys.argv[1:], "f:m:")
 154         except Exception,e:
 155                 show_usage()
 156
 157         long_string = 1
 158         for (arg,val) in args:
 159                 if arg == "-f":
 160                         file_name = val
 161                 elif arg == "-m":
 162                         if val == "short":
 163                                 long_string = 0
 164                         elif val == "long":
 165                                 long_string = 1
 166                         else:
 167                                 show_usage()
 168
 169         dh = PrintGlProcs( long_string )
 170
 171         parser = make_parser()
 172         parser.setFeature(feature_namespaces, 0)
 173         parser.setContentHandler(dh)
 174
 175         f = open(file_name)
 176
 177         dh.printHeader()
 178         parser.parse(f)
 179         dh.printFooter()