ebiten/internal/graphicsdriver/opengl/gl/conversions_cgo.go
2022-11-03 12:55:14 +09:00

44 lines
993 B
Go

// SPDX-License-Identifier: MIT
//go:build !darwin && !windows
package gl
import (
"unsafe"
)
// #include <stdlib.h>
import "C"
// GoStr takes a null-terminated string returned by OpenGL and constructs a
// corresponding Go string.
func GoStr(cstr *uint8) string {
return C.GoString((*C.char)(unsafe.Pointer(cstr)))
}
// Strs takes a list of Go strings (with or without null-termination) and
// returns their C counterpart.
//
// The returned free function must be called once you are done using the strings
// in order to free the memory.
//
// If no strings are provided as a parameter this function will panic.
func Strs(strs ...string) (cstrs **uint8, free func()) {
if len(strs) == 0 {
panic("Strs: expected at least 1 string")
}
css := make([]*uint8, 0, len(strs))
for _, str := range strs {
cs := C.CString(str)
css = append(css, (*uint8)(unsafe.Pointer(cs)))
}
return (**uint8)(&css[0]), func() {
for _, cs := range css {
C.free(unsafe.Pointer(cs))
}
}
}