opengl/libs/tools/glapigen

#! /usr/bin/perl
#
# Copyright (C) 2008 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

use strict;

sub rtrim($)
{
    my $string = shift;
    $string =~ s/\s+$//;
    return $string;
}

while (my $line = <>) {
  next if $line =~ /^\//;
  next if $line =~ /^#/;
  next if $line =~ /^\s*$/;
  if ($line !~ /^GL_API(CALL)?\s+(.+)\s+GL_APIENTRY\s+([\w]+)\s*\(([^\)]+)\);/) {
    next;
  }
  my $type = rtrim($2);
  my $name = $3;
  my $args = $4;

  #printf("%s", $line);
  
  my $prefix = "";
  if ($name eq "glGetString") {
    $prefix = "__";
  }
  
  printf("%s API_ENTRY(%s%s)(%s)", $type, $prefix, $name, $args);
  
  printf(" {\n");
  if ($type eq "void") {
    printf("    CALL_GL_API(%s", $name);
  } else {
    printf("    CALL_GL_API_RETURN(%s", $name);
  }
  my @args = split ',', $args;
  my $len = scalar(@args);
  for (my $num = 0; $num < $len; $num++) {
    if ($args[$num] ne "void") {
      print ", ";
      #
      # extract the name from the parameter
      # type name
      # const type *name
      # type *name
      # type name[4]
      #
      if ($args[$num] =~ /(\S+\s)+\**\s*([\w]+)/) {
        printf("%s", $2);
      }
    }
  }
  printf(");\n");
  printf("}\n");
}