43 lines
999 B
Go
43 lines
999 B
Go
package util
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import (
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"fmt"
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"io/ioutil"
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)
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func ReadRomOrDie(filename string, size int) []byte {
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bytes, err := ioutil.ReadFile(filename)
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if err != nil {
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panic("Cannot read ROM file: " + filename)
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}
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if len(bytes) != size {
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panic(fmt.Sprintf("Want length of %d for ROM %q; want %d", size, filename, len(bytes)))
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}
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return bytes
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}
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func ReadSmallCharacterRomOrDie(filename string) [2048]byte {
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bytes := ReadRomOrDie(filename, 512)
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if len(bytes) != 512 {
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panic(fmt.Sprintf("Got %d bytes (not 512) from file '%s'", len(bytes), filename))
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}
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var value [2048]byte
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for i, b := range bytes {
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value[i] = (b ^ 0xff) & 0x7f
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value[i+512] = b | 0x80
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value[i+1024] = b
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value[i+1536] = b | 0x80
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}
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return value
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}
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func ReadFullCharacterRomOrDie(filename string) [2048]byte {
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bytes := ReadRomOrDie(filename, 2048)
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if len(bytes) != 2048 {
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panic(fmt.Sprintf("Got %d bytes (not 2048) from file '%s'", len(bytes), filename))
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}
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var value [2048]byte
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copy(value[:], bytes)
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return value
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}
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