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;

my $lineNum = 0;
while (my $line = <>) {
  $lineNum += 1;
  next if $line =~ /^\//;
  next if $line =~ /^#/;
  next if $line =~ /^\s*$/;
  if ($line !~ /^GL_ENTRY\(([^,]+),\s*([^,]+),\s*([^)]+)\)/) {
    printf STDERR "Cannot parse line number $lineNum:\n$line";
    next;
  }
  my $type = $1;
  my $name = $2;
  my $args = $3;

  printf("%s API_ENTRY(%s)(", $type, $name);
  my @args = split ',', $args;

  my $len = scalar(@args);
  for (my $num = 0; $num < $len; $num++) {
    print ", " if $num > 0;
    my $arg = $args[$num];
    if ($arg =~ /([^]]+)(\[[^]]\])/) {
      my $argtype = $1;
      my $array = $2;
      printf("%s arg%d%s", $argtype, $num, $array);
    } else {
      if ($arg eq "void") {
        printf("void");
      } else {
        printf("%s arg%d", $arg, $num);
      }
    }
  }
  printf(") {\n");
  if ($type eq "void") {
    printf("    CALL_GL_API(%s", $name);
  } else {
    printf("    CALL_GL_API_RETURN(%s", $name);
  }
  for (my $num = 0; $num < $len; $num++) {
    if ($args[$num] ne "void") {
      print ", ";
      printf("arg%d", $num);
    }
  }
  printf(");\n}\n\n");
}