mirror of
https://github.com/golang/go
synced 2024-11-22 05:14:40 -07:00
A first stab at porting the XCB X11 protocol bindings to go.
The python script needs a checkout of xcb/proto to generate an xproto.go file, which together with xgb.go provide functions to access all of the core X11 protocol requests. I have included the generated file. Extensions and authentication methods are not implemented. R=r, rsc, nigeltao_golang https://golang.org/cl/162053
This commit is contained in:
Tor Andersson
Russ Cox
parent
9d50b468a1
commit
598f3e284e
@ -99,6 +99,7 @@ DIRS=\
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unicode\
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utf8\
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websocket\
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xgb\
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xml\
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NOTEST=\
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@ -113,6 +114,7 @@ NOTEST=\
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runtime\
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syscall\
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testing/iotest\
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xgb\
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TEST=\
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$(filter-out $(NOTEST),$(DIRS))
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20
src/pkg/xgb/Makefile
Normal file
20
src/pkg/xgb/Makefile
Normal file
@ -0,0 +1,20 @@
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# Copyright 2009 The Go Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style
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# license that can be found in the LICENSE file.
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include ../../Make.$(GOARCH)
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TARG=xgb
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GOFILES=\
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xgb.go\
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xproto.go\
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include ../../Make.pkg
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xproto: proto/src/xproto.xml
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python go_client.py -p proto/ proto/src/xproto.xml
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gofmt -w xproto.go
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proto/src/xproto.xml:
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git clone git://anongit.freedesktop.org/git/xcb/proto
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67
src/pkg/xgb/example.go
Normal file
67
src/pkg/xgb/example.go
Normal file
@ -0,0 +1,67 @@
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// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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import (
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"fmt";
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"os";
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"xgb";
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)
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func main() {
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c, err := xgb.Dial(os.Getenv("DISPLAY"));
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if err != nil {
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fmt.Printf("cannot connect: %v\n", err);
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os.Exit(1);
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}
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fmt.Printf("vendor = '%s'\n", string(c.Setup.Vendor));
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win := c.NewId();
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gc := c.NewId();
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c.CreateWindow(0, win, c.DefaultScreen().Root, 150, 150, 200, 200, 0, 0, 0, 0, nil);
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c.ChangeWindowAttributes(win, xgb.CWEventMask,
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[]uint32{xgb.EventMaskExposure | xgb.EventMaskKeyRelease});
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c.CreateGC(gc, win, 0, nil);
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c.MapWindow(win);
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atom, _ := c.InternAtom(0, "HELLO");
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fmt.Printf("atom = %d\n", atom.Atom);
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points := make([]xgb.Point, 2);
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points[1] = xgb.Point{5, 5};
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points[1] = xgb.Point{100, 120};
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hosts, _ := c.ListHosts();
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fmt.Printf("hosts = %+v\n", hosts);
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ecookie := c.ListExtensionsRequest();
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exts, _ := c.ListExtensionsReply(ecookie);
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for _, name := range exts.Names {
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fmt.Printf("exts = '%s'\n", name.Name)
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}
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for {
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reply, err := c.WaitForEvent();
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if err != nil {
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fmt.Printf("error: %v\n", err);
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os.Exit(1);
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}
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fmt.Printf("event %T\n", reply);
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switch event := reply.(type) {
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case xgb.ExposeEvent:
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c.PolyLine(xgb.CoordModeOrigin, win, gc, points)
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case xgb.KeyReleaseEvent:
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fmt.Printf("key release!\n");
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points[0].X = event.EventX;
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points[0].Y = event.EventY;
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c.PolyLine(xgb.CoordModeOrigin, win, gc, points);
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c.Bell(75);
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}
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}
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c.Close();
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}
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704
src/pkg/xgb/go_client.py
Normal file
704
src/pkg/xgb/go_client.py
Normal file
@ -0,0 +1,704 @@
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#!/usr/bin/env python
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# Copyright 2009 The Go Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style
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# license that can be found in the LICENSE file.
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from xml.etree.cElementTree import *
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from os.path import basename, exists
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import getopt
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import sys
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import re
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_ns = None
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outfile = None
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golines = []
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def go(fmt, *args):
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golines.append(fmt % args)
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namere = re.compile('([A-Z0-9][a-z]+|[A-Z0-9]+(?![a-z])|[a-z]+)')
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allcaps = re.compile('^[A-Z0-9]+$')
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sizeoftab = {
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"byte": 1,
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"int8": 1,
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"uint8": 1,
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"int16": 2,
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"uint16": 2,
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"int32": 4,
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"uint32": 4,
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"float32": 4,
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"float64": 8,
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"Id": 4,
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"Keysym": 4,
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"Timestamp": 4,
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}
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def sizeof(t):
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if t in sizeoftab:
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return sizeoftab[t]
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return 4
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symbols = []
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def readsymbols(filename):
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symbols.append("XXX Dummy XXX")
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if exists(filename):
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for line in open(filename, 'r').readlines():
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symbols.append(line.strip())
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#
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# Name munging crap for names, enums and types.
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#
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mangletab = {
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"int8_t": "int8",
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"uint8_t": "byte",
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"uint16_t": "uint16",
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"uint32_t": "uint32",
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"int16_t": "int16",
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"int32_t": "int32",
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"float": "float32",
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"double": "float64",
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"char": "byte",
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"void": "byte",
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'VISUALTYPE': 'VisualInfo',
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'DEPTH': 'DepthInfo',
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'SCREEN': 'ScreenInfo',
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'Setup': 'SetupInfo',
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'WINDOW': 'Id',
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}
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def mangle(str):
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if str in mangletab:
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return mangletab[str]
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return str
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def camel(str):
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return str[0].upper() + str[1:]
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def uncamel(str):
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return str[0].lower() + str[1:]
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def nitem(str):
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split = namere.finditer(str)
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return ''.join([camel(match.group(0)) for match in split])
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def titem(str):
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str = mangle(str)
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if str in sizeoftab:
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return str
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if allcaps.match(str):
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return str.capitalize()
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return nitem(str)
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def n(list):
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"Mangle name (JoinedCamelCase) and chop off 'xcb' prefix."
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if len(list) == 1:
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parts = [nitem(list[0])]
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else:
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parts = [nitem(x) for x in list[1:]]
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return ''.join(parts)
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def t(list):
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"Mangle name (JoinedCamelCase) and chop off 'xcb' prefix. Preserve primitive type names."
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if len(list) == 1:
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return titem(list[0])
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else:
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parts = [titem(x) for x in list[1:]]
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return ''.join(parts)
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#
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# Various helper functions
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#
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def go_type_setup(self, name, postfix):
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'''
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Sets up all the Go-related state by adding additional data fields to
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all Field and Type objects. Here is where we figure out most of our
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variable and function names.
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Recurses into child fields and list member types.
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'''
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# Do all the various names in advance
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self.c_type = t(name + postfix)
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self.c_request_name = n(name)
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self.c_reply_name = n(name + ('Reply',))
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self.c_reply_type = t(name + ('Reply',))
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if not self.is_container:
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return
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offset = 0
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for field in self.fields:
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go_type_setup(field.type, field.field_type, ())
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if field.type.is_list:
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go_type_setup(field.type.member, field.field_type, ())
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field.c_field_type = t(field.field_type)
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field.c_field_name = n((field.field_name,))
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field.c_subscript = '[%d]' % field.type.nmemb if (field.type.nmemb > 1) else ''
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field.c_pointer = ' ' if field.type.nmemb == 1 else '[]'
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field.c_offset = offset
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if field.type.fixed_size():
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offset += field.type.size * field.type.nmemb
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def go_accessor_length(expr, prefix, iswriting):
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'''
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Figures out what C code is needed to get a length field.
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For fields that follow a variable-length field, use the accessor.
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Otherwise, just reference the structure field directly.
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'''
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prefarrow = '' if prefix == '' else prefix + '.'
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if expr.lenfield_name != None:
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lenstr = prefarrow + n((expr.lenfield_name,))
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if iswriting and lenstr.endswith("Len"):
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# chop off ...Len and refer to len(array) instead
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return "len(" + lenstr[:-3] + ")"
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return "int(" + lenstr + ")"
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else:
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return str(expr.nmemb)
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def go_accessor_expr(expr, prefix, iswriting):
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'''
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Figures out what C code is needed to get the length of a list field.
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Recurses for math operations.
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Returns bitcount for value-mask fields.
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Otherwise, uses the value of the length field.
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'''
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lenexp = go_accessor_length(expr, prefix, iswriting)
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if expr.op != None:
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return '(' + go_accessor_expr(expr.lhs, prefix, iswriting) + ' ' + expr.op + ' ' + go_accessor_expr(expr.rhs, prefix, iswriting) + ')'
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elif expr.bitfield:
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return 'popCount(' + lenexp + ')'
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else:
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return lenexp
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def go_complex(self, fieldlist=None):
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'''
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Helper function for handling all structure types.
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Called for all structs, requests, replies, events, errors.
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'''
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if self.is_union:
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go('type %s struct /*union */ {', self.c_type)
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else:
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go('type %s struct {', self.c_type)
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if not fieldlist:
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fieldlist = self.fields
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for field in fieldlist:
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if field.type.is_pad:
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continue
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if field.wire and field.type.fixed_size():
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go(' %s %s%s;', field.c_field_name, field.c_subscript, field.c_field_type)
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if field.wire and not field.type.fixed_size():
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go(' %s []%s;', field.c_field_name, field.c_field_type)
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go('}')
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go('')
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def go_get(dst, ofs, typename, typesize):
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dst = "v." + dst
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if typesize == 1:
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if typename == 'byte':
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go('%s = b[%s];', dst, ofs)
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else:
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go('%s = %s(b[%s]);', dst, typename, ofs)
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elif typesize == 2:
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if typename == 'uint16':
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go('%s = get16(b[%s:]);', dst, ofs)
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else:
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go('%s = %s(get16(b[%s:]));', dst, typename, ofs)
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elif typesize == 4:
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if typename == 'uint32':
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go('%s = get32(b[%s:]);', dst, ofs)
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else:
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go('%s = %s(get32(b[%s:]));', dst, typename, ofs)
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else:
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go('get%s(b[%s:], &%s);', typename, ofs, dst)
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def go_get_list(dst, ofs, typename, typesize, count):
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if typesize == 1 and typename == 'byte':
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||||
go('copy(v.%s[0:%s], b[%s:]);', dst, count, ofs)
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else:
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||||
go('for i := 0; i < %s; i++ {', count)
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go_get(dst + "[i]", ofs + "+i*" + str(typesize), typename, typesize)
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||||
go('}')
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||||
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||||
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||||
def go_complex_reader_help(self, fieldlist):
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||||
firstvar = 1
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||||
total = 0
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||||
for field in fieldlist:
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||||
fieldname = field.c_field_name
|
||||
fieldtype = field.c_field_type
|
||||
if field.wire and field.type.fixed_size():
|
||||
total = field.c_offset + field.type.size * field.type.nmemb
|
||||
if field.type.is_pad:
|
||||
continue
|
||||
if field.type.nmemb == 1:
|
||||
go_get(fieldname, field.c_offset, fieldtype, field.type.size)
|
||||
else:
|
||||
go_get_list(fieldname, field.c_offset, fieldtype, field.type.size, field.type.nmemb)
|
||||
if field.wire and not field.type.fixed_size():
|
||||
lenstr = go_accessor_expr(field.type.expr, 'v', False)
|
||||
if firstvar:
|
||||
firstvar = 0
|
||||
go('offset := %d;', field.c_offset);
|
||||
else:
|
||||
go('offset = pad(offset);')
|
||||
go('v.%s = make([]%s, %s);', fieldname, fieldtype, lenstr)
|
||||
if fieldtype in sizeoftab:
|
||||
go_get_list(fieldname, "offset", fieldtype, sizeoftab[fieldtype], "len(v."+fieldname+")")
|
||||
go('offset += len(v.%s) * %d;', fieldname, sizeoftab[fieldtype])
|
||||
else:
|
||||
go('for i := 0; i < %s; i++ {', lenstr)
|
||||
go(' offset += get%s(b[offset:], &v.%s[i]);', fieldtype, fieldname)
|
||||
go('}')
|
||||
if not firstvar:
|
||||
return 'offset'
|
||||
return str(total)
|
||||
|
||||
def go_complex_reader(self):
|
||||
go('func get%s(b []byte, v *%s) int {', self.c_type, self.c_type)
|
||||
go(' return %s;', go_complex_reader_help(self, self.fields))
|
||||
go('}')
|
||||
go('')
|
||||
|
||||
def structsize(fieldlist):
|
||||
fixedtotal = 0
|
||||
for field in fieldlist:
|
||||
if field.wire and field.type.fixed_size():
|
||||
fixedtotal += field.type.size * field.type.nmemb
|
||||
return fixedtotal
|
||||
|
||||
def go_put(src, ofs, typename, typesize):
|
||||
if typesize == 1:
|
||||
if typename == 'byte':
|
||||
go('b[%s] = %s;', ofs, src)
|
||||
else:
|
||||
go('b[%s] = byte(%s);', ofs, src)
|
||||
elif typesize == 2:
|
||||
if typename == 'uint16':
|
||||
go('put16(b[%s:], %s);', ofs, src)
|
||||
else:
|
||||
go('put16(b[%s:], uint16(%s));', ofs, src)
|
||||
elif typesize == 4:
|
||||
if typename == 'uint32':
|
||||
go('put32(b[%s:], %s);', ofs, src)
|
||||
else:
|
||||
go('put32(b[%s:], uint32(%s));', ofs, src)
|
||||
else:
|
||||
go('put%s(b[%s:], %s);', typename, ofs, src)
|
||||
|
||||
|
||||
def go_complex_writer_help(fieldlist, prefix=''):
|
||||
prefarrow = '' if prefix == '' else prefix + '.'
|
||||
for field in fieldlist:
|
||||
fieldname = prefarrow + field.c_field_name
|
||||
fieldtype = field.c_field_type
|
||||
if fieldname.endswith("Len"):
|
||||
fieldname = "len(%s)" % fieldname[:-3]
|
||||
fieldtype = "(exp)"
|
||||
if not field.type.fixed_size():
|
||||
continue
|
||||
if field.type.is_expr:
|
||||
expstr = go_accessor_expr(field.type.expr, prefix, True)
|
||||
go_put(expstr, field.c_offset, "(exp)", field.type.size)
|
||||
elif not field.type.is_pad:
|
||||
if field.type.nmemb == 1:
|
||||
go_put(fieldname, field.c_offset, fieldtype, field.type.size)
|
||||
else:
|
||||
go(' copy(b[%d:%d], %s);', field.c_offset, field.c_offset + field.type.nmemb, fieldname)
|
||||
|
||||
def go_complex_writer_arguments(param_fields):
|
||||
out = []
|
||||
for field in param_fields:
|
||||
namestr = field.c_field_name
|
||||
typestr = field.c_pointer + t(field.field_type)
|
||||
if typestr == '[]byte' and namestr == 'Name':
|
||||
typestr = 'string'
|
||||
out.append(namestr + ' ' + typestr)
|
||||
go(' ' + ', '.join(out))
|
||||
|
||||
def go_complex_writer_arguments_names(param_fields):
|
||||
out = []
|
||||
for field in param_fields:
|
||||
out.append(field.c_field_name)
|
||||
return ', '.join(out)
|
||||
|
||||
def go_complex_writer(self, name, void):
|
||||
func_name = self.c_request_name
|
||||
|
||||
param_fields = []
|
||||
wire_fields = []
|
||||
for field in self.fields:
|
||||
if field.visible:
|
||||
# _len is taken from the list directly
|
||||
if not field.field_name.endswith("_len"):
|
||||
# The field should appear as a call parameter
|
||||
param_fields.append(field)
|
||||
if field.wire and not field.auto:
|
||||
# We need to set the field up in the structure
|
||||
wire_fields.append(field)
|
||||
|
||||
if void:
|
||||
go('func (c *Conn) %s(', func_name)
|
||||
go_complex_writer_arguments(param_fields)
|
||||
go(') {')
|
||||
else:
|
||||
go('func (c *Conn) %sRequest(', func_name)
|
||||
go_complex_writer_arguments(param_fields)
|
||||
go(') Cookie {')
|
||||
|
||||
fixedtotal = structsize(self.fields)
|
||||
if fixedtotal <= 32:
|
||||
go(' b := c.scratch[0:%d];', fixedtotal)
|
||||
else:
|
||||
go(' b := make([]byte, %d);', fixedtotal)
|
||||
firstvar = 0
|
||||
for field in wire_fields:
|
||||
if not field.type.fixed_size():
|
||||
if not firstvar:
|
||||
firstvar = 1
|
||||
go(' n := %d;', fixedtotal)
|
||||
go(' n += pad(%s * %d);', go_accessor_expr(field.type.expr, '', True), field.type.size)
|
||||
if not firstvar:
|
||||
go(' put16(b[2:], %d);', fixedtotal / 4)
|
||||
else:
|
||||
go(' put16(b[2:], uint16(n / 4));')
|
||||
go(' b[0] = %s;', self.opcode)
|
||||
go_complex_writer_help(wire_fields)
|
||||
if not void:
|
||||
if firstvar:
|
||||
go(' cookie := c.sendRequest(b);')
|
||||
else:
|
||||
go(' return c.sendRequest(b);')
|
||||
else:
|
||||
go(' c.sendRequest(b);')
|
||||
|
||||
# send extra data
|
||||
for field in param_fields:
|
||||
if not field.type.fixed_size():
|
||||
if field.type.is_list:
|
||||
fieldname = field.c_field_name
|
||||
lenstr = go_accessor_expr(field.type.expr, '', True)
|
||||
if t(field.field_type) == 'byte':
|
||||
if fieldname == 'Name':
|
||||
go(' c.sendString(%s);', fieldname)
|
||||
else:
|
||||
go(' c.sendBytes(%s[0:%s]);', fieldname, lenstr)
|
||||
elif t(field.field_type) == 'uint32':
|
||||
go(' c.sendUInt32List(%s[0:%s]);', fieldname, lenstr)
|
||||
else:
|
||||
go(' c.send%sList(%s, %s);', t(field.field_type), fieldname, lenstr)
|
||||
|
||||
if not void and firstvar:
|
||||
go(' return cookie;')
|
||||
go('}')
|
||||
go('')
|
||||
|
||||
if not void:
|
||||
args = go_complex_writer_arguments_names(param_fields)
|
||||
go('func (c *Conn) %s(', func_name)
|
||||
go_complex_writer_arguments(param_fields)
|
||||
go(') (*%s, os.Error) {', self.c_reply_type)
|
||||
go(' return c.%sReply(c.%sRequest(%s));', func_name, func_name, args)
|
||||
go('}')
|
||||
go('')
|
||||
|
||||
#
|
||||
# Struct definitions, readers and writers
|
||||
#
|
||||
|
||||
def go_struct(self, name):
|
||||
go_type_setup(self, name, ())
|
||||
if symbols and t(name) not in symbols:
|
||||
go('// excluding struct %s\n', t(name))
|
||||
return
|
||||
|
||||
if self.c_type == 'SetupRequest': return
|
||||
if self.c_type == 'SetupFailed': return
|
||||
if self.c_type == 'SetupAuthenticate': return
|
||||
|
||||
go_complex(self)
|
||||
go_complex_reader(self)
|
||||
|
||||
if self.c_type == 'Format': return
|
||||
if self.c_type == 'VisualInfo': return
|
||||
if self.c_type == 'DepthInfo': return
|
||||
if self.c_type == 'SetupInfo': return
|
||||
if self.c_type == 'ScreenInfo': return
|
||||
|
||||
# omit variable length struct writers, they're never used
|
||||
if not self.fixed_size():
|
||||
go('// omitting variable length send%s', self.c_type)
|
||||
go('')
|
||||
return
|
||||
|
||||
go('func (c *Conn) send%sList(list []%s, count int) {', self.c_type, self.c_type)
|
||||
go(' b0 := make([]byte, %d * count);', structsize(self.fields))
|
||||
go(' for k := 0; k < count; k++ {')
|
||||
go(' b := b0[k * %d:];', structsize(self.fields))
|
||||
go_complex_writer_help(self.fields, 'list[k]')
|
||||
go(' }')
|
||||
go(' c.sendBytes(b0);')
|
||||
go('}')
|
||||
go('')
|
||||
|
||||
def go_union(self, name):
|
||||
pass
|
||||
|
||||
#
|
||||
# Request writers with reply structs and readers where needed
|
||||
#
|
||||
|
||||
def replyfields(self):
|
||||
l = []
|
||||
for field in self.fields:
|
||||
if field.type.is_pad or not field.wire: continue
|
||||
if field.field_name == 'response_type': continue
|
||||
if field.field_name == 'sequence': continue
|
||||
if field.field_name == 'length':
|
||||
if self.c_reply_name != 'GetImageReply' and self.c_reply_name != 'GetKeyboardMappingReply':
|
||||
continue
|
||||
l.append(field)
|
||||
return l
|
||||
|
||||
def go_reply(self, name):
|
||||
'''
|
||||
Declares the function that returns the reply structure.
|
||||
'''
|
||||
fields = replyfields(self.reply)
|
||||
go_complex(self.reply, fields)
|
||||
go('func (c *Conn) %s(cookie Cookie) (*%s, os.Error) {', self.c_reply_name, self.c_reply_type)
|
||||
go(' b, error := c.waitForReply(cookie);')
|
||||
go(' if error != nil { return nil, error }')
|
||||
go(' v := new(%s);', self.c_reply_type)
|
||||
go_complex_reader_help(self.reply, fields)
|
||||
go(' return v, nil;')
|
||||
go('}')
|
||||
go('')
|
||||
|
||||
def go_request(self, name):
|
||||
'''
|
||||
Exported function that handles request declarations.
|
||||
'''
|
||||
go_type_setup(self, name, ('Request',))
|
||||
if symbols and n(name) not in symbols:
|
||||
go('// excluding request %s\n', n(name))
|
||||
return
|
||||
|
||||
if self.reply:
|
||||
go_complex_writer(self, name, False)
|
||||
go_type_setup(self.reply, name, ('Reply',))
|
||||
go_reply(self, name)
|
||||
else:
|
||||
go_complex_writer(self, name, True)
|
||||
|
||||
#
|
||||
# Event structs and readers
|
||||
#
|
||||
|
||||
def eventfields(self):
|
||||
l = []
|
||||
for field in self.fields:
|
||||
if field.type.is_pad or not field.wire: continue
|
||||
if field.field_name == 'response_type': continue
|
||||
if field.field_name == 'sequence': continue
|
||||
l.append(field)
|
||||
return l
|
||||
|
||||
eventlist = []
|
||||
|
||||
def dumpeventlist():
|
||||
go('func parseEvent(buf []byte) (Event, os.Error) {')
|
||||
go(' switch buf[0] {')
|
||||
for event in eventlist:
|
||||
go(' case %s: return get%sEvent(buf), nil;', event, event)
|
||||
go(' }')
|
||||
go(' return nil, os.NewError("unknown event type");')
|
||||
go('}')
|
||||
|
||||
def go_event(self, name):
|
||||
'''
|
||||
Exported function that handles event declarations.
|
||||
'''
|
||||
go_type_setup(self, name, ('Event',))
|
||||
if symbols and t(name) not in symbols:
|
||||
go('// excluding event %s\n', t(name))
|
||||
return
|
||||
|
||||
eventlist.append(n(name))
|
||||
|
||||
go('const %s = %s', t(name), self.opcodes[name])
|
||||
go('')
|
||||
fields = eventfields(self)
|
||||
if self.name == name:
|
||||
# Structure definition
|
||||
go_complex(self, fields)
|
||||
go('func get%s(b []byte) %s {', self.c_type, self.c_type)
|
||||
go(' var v %s;', self.c_type)
|
||||
go_complex_reader_help(self, fields)
|
||||
go(' return v;')
|
||||
go('}')
|
||||
go('')
|
||||
else:
|
||||
# maybe skip this depending on how it interacts with type switching on interfaces
|
||||
go('type %s %s', n(name + ('Event',)), n(self.name + ('Event',)))
|
||||
go('')
|
||||
go('func get%s(b []byte) %s {', self.c_type, self.c_type)
|
||||
go(' return (%s)(get%s(b));', n(name + ('Event',)), n(self.name + ('Event',)))
|
||||
go('}')
|
||||
go('')
|
||||
|
||||
#
|
||||
# Map simple types to primitive types
|
||||
#
|
||||
|
||||
def go_simple(self, name):
|
||||
'''
|
||||
Exported function that handles cardinal type declarations.
|
||||
These are types which are typedef'd to one of the CARDx's, char, float, etc.
|
||||
We stick them into the mangletab. Lop off xcb prefix.
|
||||
'''
|
||||
go_type_setup(self, name, ())
|
||||
if self.name != name:
|
||||
if _ns.is_ext:
|
||||
name = name[2]
|
||||
else:
|
||||
name = name[1]
|
||||
if name == "KEYSYM":
|
||||
mangletab[name] = "Keysym"
|
||||
elif name == "TIMESTAMP":
|
||||
mangletab[name] = "Timestamp"
|
||||
elif self.size == 4:
|
||||
mangletab[name] = "Id"
|
||||
else:
|
||||
mangletab[name] = t(self.name)
|
||||
|
||||
#
|
||||
# Dump enums as consts, calculate implicit values instead
|
||||
# of using iota.
|
||||
#
|
||||
|
||||
def go_enum(self, name):
|
||||
if symbols and t(name) not in symbols:
|
||||
go('// excluding enum %s\n', t(name))
|
||||
return
|
||||
go('const (')
|
||||
iota = 0
|
||||
for (enam, eval) in self.values:
|
||||
if str(eval) == '':
|
||||
iota = iota + 1
|
||||
eval = iota
|
||||
else:
|
||||
iota = int(eval)
|
||||
if name[1] == 'Atom':
|
||||
s = name[1] + "".join([x.capitalize() for x in enam.split("_")])
|
||||
else:
|
||||
s = n(name + (enam,))
|
||||
go(' %s = %s;', s, eval)
|
||||
go(')')
|
||||
go('')
|
||||
|
||||
errorlist = []
|
||||
|
||||
def dumperrorlist():
|
||||
go('var errorNames = map[byte]string{')
|
||||
for error in errorlist:
|
||||
go(' Bad%s: "%s",', error, error)
|
||||
go('}')
|
||||
go('')
|
||||
|
||||
def go_error(self, name):
|
||||
'''
|
||||
Exported function that handles error declarations.
|
||||
'''
|
||||
errorlist.append(n(name))
|
||||
go('const Bad%s = %s', n(name), self.opcodes[name])
|
||||
go('')
|
||||
|
||||
#
|
||||
# Create the go file
|
||||
#
|
||||
|
||||
def go_open(self):
|
||||
'''
|
||||
Exported function that handles module open.
|
||||
Opens the files and writes out the auto-generated code.
|
||||
'''
|
||||
global _ns
|
||||
_ns = self.namespace
|
||||
|
||||
go('// This file was generated automatically from %s.', _ns.file)
|
||||
go('')
|
||||
go('package xgb')
|
||||
go('')
|
||||
go('import "os"')
|
||||
go('')
|
||||
|
||||
if _ns.is_ext:
|
||||
go('const %s_MAJOR_VERSION = %s', _ns.ext_name.upper(), _ns.major_version)
|
||||
go('const %s_MINOR_VERSION = %s', _ns.ext_name.upper(), _ns.minor_version)
|
||||
go('')
|
||||
|
||||
def go_close(self):
|
||||
'''
|
||||
Exported function that handles module close.
|
||||
'''
|
||||
global outfile
|
||||
if len(eventlist) > 0:
|
||||
dumpeventlist()
|
||||
if len(errorlist) > 0:
|
||||
dumperrorlist()
|
||||
if not outfile:
|
||||
outfile = '%s.go' % _ns.header
|
||||
gofile = open(outfile, 'w')
|
||||
for line in golines:
|
||||
gofile.write(line)
|
||||
gofile.write('\n')
|
||||
gofile.close()
|
||||
|
||||
# Main routine starts here
|
||||
|
||||
# Must create an "output" dictionary before any xcbgen imports.
|
||||
output = {'open' : go_open,
|
||||
'close' : go_close,
|
||||
'simple' : go_simple,
|
||||
'enum' : go_enum,
|
||||
'struct' : go_struct,
|
||||
'union' : go_union,
|
||||
'request' : go_request,
|
||||
'event' : go_event,
|
||||
'error' : go_error
|
||||
}
|
||||
|
||||
# Boilerplate below this point
|
||||
|
||||
# Check for the argument that specifies path to the xcbgen python package.
|
||||
try:
|
||||
opts, args = getopt.getopt(sys.argv[1:], 'p:s:o:')
|
||||
except getopt.GetoptError, err:
|
||||
print str(err)
|
||||
print 'Usage: go_client.py [-p path] [-s symbol_list_file] [-o output.go] file.xml'
|
||||
sys.exit(1)
|
||||
|
||||
for (opt, arg) in opts:
|
||||
if opt == '-p':
|
||||
sys.path.append(arg)
|
||||
if opt == '-s':
|
||||
readsymbols(arg)
|
||||
if opt == '-o':
|
||||
outfile = arg
|
||||
|
||||
# Import the module class
|
||||
try:
|
||||
from xcbgen.state import Module
|
||||
except ImportError:
|
||||
print 'Failed to load the xcbgen Python package!'
|
||||
print 'Make sure that xcb/proto installed it on your Python path,'
|
||||
print 'or pass the path with -p.'
|
||||
print ''
|
||||
raise
|
||||
|
||||
module = Module(args[0], output)
|
||||
module.register()
|
||||
module.resolve()
|
||||
module.generate()
|
||||
398
src/pkg/xgb/xgb.go
Normal file
398
src/pkg/xgb/xgb.go
Normal file
@ -0,0 +1,398 @@
|
||||
// Copyright 2009 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
// The XGB package implements the X11 core protocol.
|
||||
// It is based on XCB: http://xcb.freedesktop.org/
|
||||
package xgb
|
||||
|
||||
import (
|
||||
"fmt";
|
||||
"io";
|
||||
"net";
|
||||
"os";
|
||||
"strconv";
|
||||
"strings";
|
||||
)
|
||||
|
||||
// A Conn represents a connection to an X server.
|
||||
// Only one goroutine should use a Conn's methods at a time.
|
||||
type Conn struct {
|
||||
conn net.Conn;
|
||||
nextId Id;
|
||||
nextCookie Cookie;
|
||||
replies map[Cookie][]byte;
|
||||
events queue;
|
||||
err os.Error;
|
||||
defaultScreen int;
|
||||
scratch [32]byte;
|
||||
Setup SetupInfo;
|
||||
}
|
||||
|
||||
// Id is used for all X identifiers, such as windows, pixmaps, and GCs.
|
||||
type Id uint32
|
||||
|
||||
// Cookies are the sequence numbers used to pair replies up with their requests
|
||||
type Cookie uint16
|
||||
|
||||
type Keysym uint32
|
||||
type Timestamp uint32
|
||||
|
||||
// Event is an interface that can contain any of the events returned by the server.
|
||||
// Use a type assertion switch to extract the Event structs.
|
||||
type Event interface{}
|
||||
|
||||
// Error contains protocol errors returned to us by the X server.
|
||||
type Error struct {
|
||||
Detail uint8;
|
||||
Major uint8;
|
||||
Minor uint16;
|
||||
Cookie Cookie;
|
||||
Id Id;
|
||||
}
|
||||
|
||||
func (e *Error) String() string {
|
||||
return fmt.Sprintf("Bad%s (major=%d minor=%d cookie=%d id=0x%x)",
|
||||
errorNames[e.Detail], e.Major, e.Minor, e.Cookie, e.Id)
|
||||
}
|
||||
|
||||
// NewID generates a new unused ID for use with requests like CreateWindow.
|
||||
func (c *Conn) NewId() Id {
|
||||
id := c.nextId;
|
||||
// TODO: handle ID overflow
|
||||
c.nextId++;
|
||||
return id;
|
||||
}
|
||||
|
||||
// Pad a length to align on 4 bytes.
|
||||
func pad(n int) int { return (n + 3) & ^3 }
|
||||
|
||||
func put16(buf []byte, v uint16) {
|
||||
buf[0] = byte(v);
|
||||
buf[1] = byte(v >> 8);
|
||||
}
|
||||
|
||||
func put32(buf []byte, v uint32) {
|
||||
buf[0] = byte(v);
|
||||
buf[1] = byte(v >> 8);
|
||||
buf[2] = byte(v >> 16);
|
||||
buf[3] = byte(v >> 24);
|
||||
}
|
||||
|
||||
func get16(buf []byte) uint16 {
|
||||
v := uint16(buf[0]);
|
||||
v |= uint16(buf[1]) << 8;
|
||||
return v;
|
||||
}
|
||||
|
||||
func get32(buf []byte) uint32 {
|
||||
v := uint32(buf[0]);
|
||||
v |= uint32(buf[1]) << 8;
|
||||
v |= uint32(buf[2]) << 16;
|
||||
v |= uint32(buf[3]) << 32;
|
||||
return v;
|
||||
}
|
||||
|
||||
// Voodoo to count the number of bits set in a value list mask.
|
||||
func popCount(mask0 int) int {
|
||||
mask := uint32(mask0);
|
||||
n := 0;
|
||||
for i := uint32(0); i < 32; i++ {
|
||||
if mask&(1<<i) != 0 {
|
||||
n++
|
||||
}
|
||||
}
|
||||
return n;
|
||||
}
|
||||
|
||||
// A simple queue used to stow away events.
|
||||
type queue struct {
|
||||
data [][]byte;
|
||||
a, b int;
|
||||
}
|
||||
|
||||
func (q *queue) queue(item []byte) {
|
||||
if q.b == len(q.data) {
|
||||
if q.a > 0 {
|
||||
copy(q.data, q.data[q.a:q.b]);
|
||||
q.a, q.b = 0, q.b-q.a;
|
||||
} else {
|
||||
newData := make([][]byte, (len(q.data)*3)/2);
|
||||
copy(newData, q.data);
|
||||
q.data = newData;
|
||||
}
|
||||
}
|
||||
q.data[q.b] = item;
|
||||
q.b++;
|
||||
}
|
||||
|
||||
func (q *queue) dequeue() []byte {
|
||||
if q.a < q.b {
|
||||
item := q.data[q.a];
|
||||
q.a++;
|
||||
return item;
|
||||
}
|
||||
return nil;
|
||||
}
|
||||
|
||||
// sendRequest sends a request to the server and return its associated sequence number, or cookie.
|
||||
// It is only used to send the fixed length portion of the request, sendBytes and friends are used
|
||||
// to send any additional variable length data.
|
||||
func (c *Conn) sendRequest(buf []byte) Cookie {
|
||||
if _, err := c.conn.Write(buf); err != nil {
|
||||
fmt.Fprintf(os.Stderr, "x protocol write error: %s\n", err);
|
||||
c.err = err;
|
||||
}
|
||||
cookie := c.nextCookie;
|
||||
c.nextCookie++;
|
||||
return cookie;
|
||||
}
|
||||
|
||||
// sendPadding sends enough bytes to align to a 4-byte border.
|
||||
// It is used to pad the variable length data that is used with some requests.
|
||||
func (c *Conn) sendPadding(n int) {
|
||||
x := pad(n) - n;
|
||||
if x > 0 {
|
||||
_, err := c.conn.Write(c.scratch[0:x]);
|
||||
if err != nil {
|
||||
fmt.Fprintf(os.Stderr, "x protocol write error: %s\n", err);
|
||||
c.err = err;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// sendBytes sends a byte slice as variable length data after the fixed portion of a request,
|
||||
// along with any necessary padding.
|
||||
func (c *Conn) sendBytes(buf []byte) {
|
||||
if _, err := c.conn.Write(buf); err != nil {
|
||||
fmt.Fprintf(os.Stderr, "x protocol write error: %s\n", err);
|
||||
c.err = err;
|
||||
}
|
||||
c.sendPadding(len(buf));
|
||||
}
|
||||
|
||||
func (c *Conn) sendString(str string) { c.sendBytes(strings.Bytes(str)) }
|
||||
|
||||
// sendUInt32s sends a list of 32-bit integers as variable length data.
|
||||
func (c *Conn) sendUInt32List(list []uint32) {
|
||||
buf := make([]byte, len(list)*4);
|
||||
for i := 0; i < len(list); i++ {
|
||||
put32(buf[i*4:], list[i])
|
||||
}
|
||||
c.sendBytes(buf);
|
||||
}
|
||||
|
||||
func (c *Conn) sendIdList(list []Id, length int) {
|
||||
buf := make([]byte, length*4);
|
||||
for i := 0; i < length; i++ {
|
||||
put32(buf[i*4:], uint32(list[i]))
|
||||
}
|
||||
c.sendBytes(buf);
|
||||
}
|
||||
|
||||
func (c *Conn) sendKeysymList(list []Keysym, length int) {
|
||||
buf := make([]byte, length*4);
|
||||
for i := 0; i < length; i++ {
|
||||
put32(buf[i*4:], uint32(list[i]))
|
||||
}
|
||||
c.sendBytes(buf);
|
||||
}
|
||||
|
||||
// readNextReply reads and processes the next server reply.
|
||||
// If it is a protocol error then it is returned as an Error.
|
||||
// Events are pushed onto the event queue and replies to requests
|
||||
// are stashed away in a map indexed by the sequence number.
|
||||
func (c *Conn) readNextReply() os.Error {
|
||||
buf := make([]byte, 32);
|
||||
if _, err := io.ReadFull(c.conn, buf); err != nil {
|
||||
fmt.Fprintf(os.Stderr, "x protocol read error: %s\n", err);
|
||||
return err;
|
||||
}
|
||||
|
||||
switch buf[0] {
|
||||
case 0:
|
||||
err := &Error{
|
||||
Detail: buf[1],
|
||||
Cookie: Cookie(get16(buf[2:])),
|
||||
Id: Id(get32(buf[4:])),
|
||||
Minor: get16(buf[8:]),
|
||||
Major: buf[10],
|
||||
};
|
||||
fmt.Fprintf(os.Stderr, "x protocol error: %s\n", err);
|
||||
return err;
|
||||
|
||||
case 1:
|
||||
seq := Cookie(get16(buf[2:]));
|
||||
size := get32(buf[4:]);
|
||||
if size > 0 {
|
||||
bigbuf := make([]byte, 32+size*4, 32+size*4);
|
||||
copy(bigbuf[0:32], buf);
|
||||
if _, err := io.ReadFull(c.conn, bigbuf[32:]); err != nil {
|
||||
fmt.Fprintf(os.Stderr, "x protocol read error: %s\n", err);
|
||||
return err;
|
||||
}
|
||||
c.replies[seq] = bigbuf;
|
||||
} else {
|
||||
c.replies[seq] = buf
|
||||
}
|
||||
|
||||
default:
|
||||
c.events.queue(buf)
|
||||
}
|
||||
|
||||
return nil;
|
||||
}
|
||||
|
||||
// waitForReply looks for a reply in the map indexed by sequence number.
|
||||
// If the reply is not in the map it will block while reading replies from the server
|
||||
// until the reply is found or an error occurs.
|
||||
func (c *Conn) waitForReply(cookie Cookie) ([]byte, os.Error) {
|
||||
for {
|
||||
if reply, ok := c.replies[cookie]; ok {
|
||||
c.replies[cookie] = reply, false;
|
||||
return reply, nil;
|
||||
}
|
||||
if err := c.readNextReply(); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
panic("unreachable");
|
||||
}
|
||||
|
||||
// WaitForEvent returns the next event from the server.
|
||||
// It will block until an event is available.
|
||||
func (c *Conn) WaitForEvent() (Event, os.Error) {
|
||||
for {
|
||||
if reply := c.events.dequeue(); reply != nil {
|
||||
return parseEvent(reply)
|
||||
}
|
||||
if err := c.readNextReply(); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
panic("unreachable");
|
||||
}
|
||||
|
||||
// PollForEvent returns the next event from the server if one is available in the internal queue.
|
||||
// It will not read from the connection, so you must call WaitForEvent to receive new events.
|
||||
// Only use this function to empty the queue without blocking.
|
||||
func (c *Conn) PollForEvent() (Event, os.Error) {
|
||||
if reply := c.events.dequeue(); reply != nil {
|
||||
return parseEvent(reply)
|
||||
}
|
||||
return nil, nil;
|
||||
}
|
||||
|
||||
// Dial connects to the X server given in the 'display' string.
|
||||
// The display string is typically taken from os.Getenv("DISPLAY").
|
||||
func Dial(display string) (*Conn, os.Error) {
|
||||
var err os.Error;
|
||||
|
||||
c := new(Conn);
|
||||
|
||||
if display[0] == '/' {
|
||||
c.conn, err = net.Dial("unix", "", display);
|
||||
if err != nil {
|
||||
fmt.Printf("cannot connect: %v\n", err);
|
||||
return nil, err;
|
||||
}
|
||||
} else {
|
||||
parts := strings.Split(display, ":", 2);
|
||||
host := parts[0];
|
||||
port := 0;
|
||||
if len(parts) > 1 {
|
||||
parts = strings.Split(parts[1], ".", 2);
|
||||
port, _ = strconv.Atoi(parts[0]);
|
||||
if len(parts) > 1 {
|
||||
c.defaultScreen, _ = strconv.Atoi(parts[1])
|
||||
}
|
||||
}
|
||||
display = fmt.Sprintf("%s:%d", host, port+6000);
|
||||
c.conn, err = net.Dial("tcp", "", display);
|
||||
if err != nil {
|
||||
fmt.Printf("cannot connect: %v\n", err);
|
||||
return nil, err;
|
||||
}
|
||||
}
|
||||
|
||||
// TODO: get these from .Xauthority
|
||||
var authName, authData []byte;
|
||||
|
||||
buf := make([]byte, 12+pad(len(authName))+pad(len(authData)));
|
||||
buf[0] = 'l';
|
||||
buf[1] = 0;
|
||||
put16(buf[2:], 11);
|
||||
put16(buf[4:], 0);
|
||||
put16(buf[6:], uint16(len(authName)));
|
||||
put16(buf[8:], uint16(len(authData)));
|
||||
put16(buf[10:], 0);
|
||||
copy(buf[12:], authName);
|
||||
copy(buf[12+pad(len(authName)):], authData);
|
||||
if _, err = c.conn.Write(buf); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
head := make([]byte, 8);
|
||||
if _, err = io.ReadFull(c.conn, head[0:8]); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
code := head[0];
|
||||
reasonLen := head[1];
|
||||
major := get16(head[2:]);
|
||||
minor := get16(head[4:]);
|
||||
dataLen := get16(head[6:]);
|
||||
|
||||
if major != 11 || minor != 0 {
|
||||
return nil, os.NewError(fmt.Sprintf("x protocol version mismatch: %d.%d", major, minor))
|
||||
}
|
||||
|
||||
buf = make([]byte, int(dataLen)*4+8, int(dataLen)*4+8);
|
||||
copy(buf, head);
|
||||
if _, err = io.ReadFull(c.conn, buf[8:]); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
if code == 0 {
|
||||
reason := buf[8 : 8+reasonLen];
|
||||
return nil, os.NewError(fmt.Sprintf("x protocol authentication refused: %s", string(reason)));
|
||||
}
|
||||
|
||||
getSetupInfo(buf, &c.Setup);
|
||||
|
||||
if c.defaultScreen >= len(c.Setup.Roots) {
|
||||
c.defaultScreen = 0
|
||||
}
|
||||
|
||||
c.nextId = Id(c.Setup.ResourceIdBase);
|
||||
c.nextCookie = 1;
|
||||
c.replies = make(map[Cookie][]byte);
|
||||
c.events = queue{make([][]byte, 100), 0, 0};
|
||||
return c, nil;
|
||||
}
|
||||
|
||||
// Close closes the connection to the X server.
|
||||
func (c *Conn) Close() { c.conn.Close() }
|
||||
|
||||
// DefaultScreen returns the Screen info for the default screen, which is
|
||||
// 0 or the one given in the display argument to Dial.
|
||||
func (c *Conn) DefaultScreen() *ScreenInfo { return &c.Setup.Roots[c.defaultScreen] }
|
||||
|
||||
|
||||
// ClientMessageData holds the data from a client message,
|
||||
// duplicated in three forms because Go doesn't have unions.
|
||||
type ClientMessageData struct {
|
||||
Data8 [20]byte;
|
||||
Data16 [10]uint16;
|
||||
Data32 [5]uint32;
|
||||
}
|
||||
|
||||
func getClientMessageData(b []byte, v *ClientMessageData) int {
|
||||
copy(&v.Data8, b);
|
||||
for i := 0; i < 10; i++ {
|
||||
v.Data16[i] = get16(b[i*2:])
|
||||
}
|
||||
for i := 0; i < 5; i++ {
|
||||
v.Data32[i] = get32(b[i*4:])
|
||||
}
|
||||
return 20;
|
||||
}
|
||||
4153
src/pkg/xgb/xproto.go
Normal file
4153
src/pkg/xgb/xproto.go
Normal file
File diff suppressed because it is too large
Load Diff
Loading…
Reference in New Issue
Block a user