//go:build !nocgo

package vt

/*
// This preamble must contain DECLARATIONS ONLY — cgo refuses to compile
// a file that both defines functions in its preamble and has //export
// directives. The helper definitions live in ghostty.go's preamble.

#include <stdint.h>
#include <stddef.h>
#include <ghostty/vt.h>
*/
import "C"

import (
	"runtime/cgo"
	"unsafe"
)

//export pattermGhosttyWritePty
func pattermGhosttyWritePty(_ C.GhosttyTerminal, userdata unsafe.Pointer, data *C.uint8_t, length C.size_t) {
	if userdata == nil || data == nil || length == 0 {
		return
	}
	h := cgo.Handle(uintptr(userdata))
	v := h.Value()
	e, ok := v.(*GhosttyEmulator)
	if !ok || e == nil {
		return
	}
	cb := e.writePTYCallback()
	if cb == nil {
		return
	}
	buf := C.GoBytes(unsafe.Pointer(data), C.int(length))
	cb(buf)
}