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303965e1a9
Copying []byte to string should copy the data if necessary, as the Go specification assures that strings are immutable.
42 lines
798 B
Go
42 lines
798 B
Go
// SPDX-License-Identifier: MIT
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//go:build darwin || windows
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package gl
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import (
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"runtime"
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"unsafe"
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)
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// GoStr takes a null-terminated string returned by OpenGL and constructs a
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// corresponding Go string.
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func GoStr(cstr *byte) string {
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if cstr == nil {
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return ""
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}
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x := unsafe.Slice(cstr, 1e9)
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for i, c := range x {
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if c == 0 {
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return string(x[:i])
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}
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}
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return ""
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}
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// CStr takes a Go string (with or without null-termination)
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// and returns the C counterpart.
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//
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// The returned free function must be called once you are done using the string
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// in order to free the memory.
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func CStr(str string) (cstr *byte, free func()) {
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bs := []byte(str)
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if len(bs) == 0 || bs[len(bs)-1] != 0 {
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bs = append(bs, 0)
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}
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return &bs[0], func() {
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runtime.KeepAlive(bs)
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bs = nil
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}
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}
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