57 lines
1.1 KiB
Go
57 lines
1.1 KiB
Go
// This work is subject to the CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
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// license. Its contents can be found at:
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// http://creativecommons.org/publicdomain/zero/1.0/
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package main
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import (
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"compress/gzip"
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"fmt"
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"io"
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)
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// input -> gzip -> gowriter -> output.
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func translate_nomemcpy_comp(input io.Reader, output io.Writer, pkgname, funcname string) {
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fmt.Fprintf(output, `package %s
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import (
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"bytes"
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"compress/gzip"
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"io"
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"reflect"
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"unsafe"
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)
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var _%s = "`, pkgname, funcname)
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gz := gzip.NewWriter(&StringWriter{Writer: output})
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io.Copy(gz, input)
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gz.Close()
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fmt.Fprintf(output, `"
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// %s returns the raw, uncompressed file data data.
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func %s() []byte {
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var empty [0]byte
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sx := (*reflect.StringHeader)(unsafe.Pointer(&_%s))
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b := empty[:]
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bx := (*reflect.SliceHeader)(unsafe.Pointer(&b))
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bx.Data = sx.Data
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bx.Len = len(_%s)
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bx.Cap = bx.Len
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gz, err := gzip.NewReader(bytes.NewBuffer(b))
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if err != nil {
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panic("Decompression failed: " + err.Error())
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}
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var buf bytes.Buffer
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io.Copy(&buf, gz)
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gz.Close()
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return buf.Bytes()
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}
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`, funcname, funcname, funcname, funcname)
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}
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