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// Package bigreq is the X client API for the BIG-REQUESTS extension.
package bigreq
// This file is automatically generated from bigreq.xml. Edit at your peril!
import (
xgb "janouch.name/haven/nexgb"
"janouch.name/haven/nexgb/xproto"
)
const (
MajorVersion = 0
MinorVersion = 0
)
// Init must be called before using the BIG-REQUESTS extension.
func Init(c *xgb.Conn) error {
reply, err := xproto.QueryExtension(c, 12, "BIG-REQUESTS").Reply()
switch {
case err != nil:
return err
case !reply.Present:
return xgb.Errorf("No extension named BIG-REQUESTS could be found on on the server.")
}
c.ExtLock.Lock()
c.Extensions["BIG-REQUESTS"] = reply.MajorOpcode
c.ExtLock.Unlock()
for evNum, fun := range xgb.NewExtEventFuncs["BIG-REQUESTS"] {
xgb.NewEventFuncs[int(reply.FirstEvent)+evNum] = fun
}
for errNum, fun := range xgb.NewExtErrorFuncs["BIG-REQUESTS"] {
xgb.NewErrorFuncs[int(reply.FirstError)+errNum] = fun
}
return nil
}
func init() {
xgb.NewExtEventFuncs["BIG-REQUESTS"] = make(map[int]xgb.NewEventFun)
xgb.NewExtErrorFuncs["BIG-REQUESTS"] = make(map[int]xgb.NewErrorFun)
}
// Skipping definition for base type 'Bool'
// Skipping definition for base type 'Byte'
// Skipping definition for base type 'Card8'
// Skipping definition for base type 'Char'
// Skipping definition for base type 'Void'
// Skipping definition for base type 'Double'
// Skipping definition for base type 'Float'
// Skipping definition for base type 'Int16'
// Skipping definition for base type 'Int32'
// Skipping definition for base type 'Int8'
// Skipping definition for base type 'Card16'
// Skipping definition for base type 'Card32'
// EnableCookie is a cookie used only for Enable requests.
type EnableCookie struct {
*xgb.Cookie
}
// Enable sends a checked request.
// If an error occurs, it will be returned with the reply by calling EnableCookie.Reply.
func Enable(c *xgb.Conn) EnableCookie {
c.ExtLock.RLock()
defer c.ExtLock.RUnlock()
if _, ok := c.Extensions["BIG-REQUESTS"]; !ok {
panic("Cannot issue request 'Enable' using the uninitialized extension 'BIG-REQUESTS'. bigreq.Init(connObj) must be called first.")
}
cookie := c.NewCookie(true, true)
c.NewRequest(enableRequest(c), cookie)
return EnableCookie{cookie}
}
// EnableUnchecked sends an unchecked request.
// If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
func EnableUnchecked(c *xgb.Conn) EnableCookie {
c.ExtLock.RLock()
defer c.ExtLock.RUnlock()
if _, ok := c.Extensions["BIG-REQUESTS"]; !ok {
panic("Cannot issue request 'Enable' using the uninitialized extension 'BIG-REQUESTS'. bigreq.Init(connObj) must be called first.")
}
cookie := c.NewCookie(false, true)
c.NewRequest(enableRequest(c), cookie)
return EnableCookie{cookie}
}
// EnableReply represents the data returned from a Enable request.
type EnableReply struct {
Sequence uint16 // sequence number of the request for this reply
Length uint32 // number of bytes in this reply
// padding: 1 bytes
MaximumRequestLength uint32
}
// Reply blocks and returns the reply data for a Enable request.
func (cook EnableCookie) Reply() (*EnableReply, error) {
buf, err := cook.Cookie.Reply()
if err != nil {
return nil, err
}
if buf == nil {
return nil, nil
}
return enableReply(buf), nil
}
// enableReply reads a byte slice into a EnableReply value.
func enableReply(buf []byte) *EnableReply {
v := new(EnableReply)
b := 1 // skip reply determinant
b += 1 // padding
v.Sequence = xgb.Get16(buf[b:])
b += 2
v.Length = xgb.Get32(buf[b:]) // 4-byte units
b += 4
v.MaximumRequestLength = xgb.Get32(buf[b:])
b += 4
return v
}
// enableRequest writes a Enable request to a byte slice for transfer.
func enableRequest(c *xgb.Conn) []byte {
size := 4
b := 0
buf := make([]byte, size)
c.ExtLock.RLock()
buf[b] = c.Extensions["BIG-REQUESTS"]
c.ExtLock.RUnlock()
b += 1
buf[b] = 0 // request opcode
b += 1
xgb.Put16(buf[b:], uint16(size/4)) // write request size in 4-byte units
b += 2
return buf
}
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