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Implemented the Dynamic API magic.

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--HG--
extra : rebase_source : 38f639089d3d142895d5cf106919a0bfbb65c5ed
This commit is contained in:
Ryan C. Gordon 2013-12-09 16:03:18 -05:00
parent 82edee6971
commit 63256a2384
21 changed files with 1808 additions and 1 deletions
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141
src/dynapi/gendynapi.pl Executable file
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#!/usr/bin/perl -w
# Simple DirectMedia Layer
# Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org>
#
# This software is provided 'as-is', without any express or implied
# warranty. In no event will the authors be held liable for any damages
# arising from the use of this software.
#
# Permission is granted to anyone to use this software for any purpose,
# including commercial applications, and to alter it and redistribute it
# freely, subject to the following restrictions:
#
# 1. The origin of this software must not be misrepresented; you must not
# claim that you wrote the original software. If you use this software
# in a product, an acknowledgment in the product documentation would be
# appreciated but is not required.
# 2. Altered source versions must be plainly marked as such, and must not be
# misrepresented as being the original software.
# 3. This notice may not be removed or altered from any source distribution.
# WHAT IS THIS?
# When you add a public API to SDL, please run this script, make sure the
# output looks sane (hg diff, it adds to existing files), and commit it.
# It keeps the dynamic API jump table operating correctly.
# If you wanted this to be readable, you shouldn't have used perl.
use warnings;
use strict;
use File::Basename;
chdir(dirname(__FILE__) . '/../..');
my $sdl_dynapi_procs_h = "src/dynapi/SDL_dynapi_procs.h";
my $sdl_dynapi_overrides_h = "src/dynapi/SDL_dynapi_overrides.h";
my %existing = ();
if (-f $sdl_dynapi_procs_h) {
open(SDL_DYNAPI_PROCS_H, '<', $sdl_dynapi_procs_h) or die("Can't open $sdl_dynapi_procs_h: $!\n");
while (<SDL_DYNAPI_PROCS_H>) {
if (/\ASDL_DYNAPI_PROC\(.*?,(.*?),/) {
$existing{$1} = 1;
}
}
close(SDL_DYNAPI_PROCS_H)
}
open(SDL_DYNAPI_PROCS_H, '>>', $sdl_dynapi_procs_h) or die("Can't open $sdl_dynapi_procs_h: $!\n");
open(SDL_DYNAPI_OVERRIDES_H, '>>', $sdl_dynapi_overrides_h) or die("Can't open $sdl_dynapi_overrides_h: $!\n");
opendir(HEADERS, 'include') or die("Can't open include dir: $!\n");
while (readdir(HEADERS)) {
next if not /\.h\Z/;
my $header = "include/$_";
open(HEADER, '<', $header) or die("Can't open $header: $!\n");
while (<HEADER>) {
chomp;
next if not /\A\s*extern\s+DECLSPEC/;
my $decl = "$_ ";
if (not $decl =~ /\)\s*;/) {
while (<HEADER>) {
chomp;
s/\A\s+//;
s/\s+\Z//;
$decl .= "$_ ";
last if /\)\s*;/;
}
}
$decl =~ s/\s+\Z//;
#print("DECL: [$decl]\n");
if ($decl =~ /\A\s*extern\s+DECLSPEC\s+(const\s+|)(unsigned\s+|)(.*?)\s*(\*?)\s*SDLCALL\s+(.*?)\s*\((.*?)\);/) {
my $rc = "$1$2$3$4";
my $fn = $5;
next if $existing{$fn}; # already slotted into the jump table.
my @params = split(',', $6);
#print("rc == '$rc', fn == '$fn', params == '$params'\n");
my $retstr = ($rc eq 'void') ? '' : 'return';
my $paramstr = '(';
my $argstr = '(';
my $i = 0;
foreach (@params) {
my $str = $_;
$str =~ s/\A\s+//;
$str =~ s/\s+\Z//;
#print("1PARAM: $str\n");
if ($str eq 'void') {
$paramstr .= 'void';
} elsif ($str eq '...') {
if ($i > 0) {
$paramstr .= ', ';
}
$paramstr .= $str;
} elsif ($str =~ /\A\s*((const\s+|)(unsigned\s+|)([a-zA-Z0-9_]*)\s*([\*\s]*))\s*(.*?)\Z/) {
#print("PARSED: [$1], [$2], [$3], [$4], [$5]\n");
my $type = $1;
my $var = $6;
$type =~ s/\A\s+//;
$type =~ s/\s+\Z//;
$var =~ s/\A\s+//;
$var =~ s/\s+\Z//;
$type =~ s/\s*\*\Z/*/g;
$type =~ s/\s*(\*+)\Z/ $1/;
#print("SPLIT: ($type, $var)\n");
my $name = chr(ord('a') + $i);
if ($i > 0) {
$paramstr .= ', ';
$argstr .= ',';
}
my $spc = ($type =~ /\*\Z/) ? '' : ' ';
$paramstr .= "$type$spc$name";
$argstr .= "$name";
}
$i++;
}
$paramstr = '(void' if ($i == 0); # Just to make this consistent.
$paramstr .= ')';
$argstr .= ')';
print("NEW: $decl\n");
print SDL_DYNAPI_PROCS_H "SDL_DYNAPI_PROC($rc,$fn,$paramstr,$argstr,$retstr)\n";
print SDL_DYNAPI_OVERRIDES_H "#define $fn ${fn}_REAL\n";
} else {
print("Failed to parse decl [$decl]!\n");
}
}
close(HEADER);
}
closedir(HEADERS);
close(SDL_DYNAPI_PROCS_H);
close(SDL_DYNAPI_OVERRIDES_H);
# vi: set ts=4 sw=4 expandtab: