DBot/KStarbound
DBot/KStarbound
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readNBytes impl

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This commit is contained in:
DBotThePony 2022-12-02 14:53:20 +07:00
parent e8eed40a73
commit 64b777c11a
Signed by: DBot
GPG Key ID: DCC23B5715498507
1 changed files with 21 additions and 2 deletions
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23
src/main/kotlin/ru/dbotthepony/kstarbound/io/StarboundPak.kt
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@ -7,6 +7,7 @@ import java.io.BufferedInputStream
import java.io.Closeable import java.io.Closeable
import java.io.DataInputStream import java.io.DataInputStream
import java.io.File import java.io.File
import java.io.IOError
import java.io.IOException import java.io.IOException
import java.io.InputStream import java.io.InputStream
import java.io.RandomAccessFile import java.io.RandomAccessFile
@ -101,6 +102,25 @@ class StarboundPak(val path: File, callback: (finished: Boolean, status: String)
return reader.read() return reader.read()
} }
override fun readNBytes(len: Int): ByteArray {
require(len >= 0) { "Negative length to read: $len" }
val readMax = len.coerceAtMost((length - innerOffset).toInt())
if (readMax == 0)
return ByteArray(0)
val b = ByteArray(readMax)
reader.seek(innerOffset + offset)
val readBytes = reader.read(b)
if (readBytes != readMax)
throw IOError(RuntimeException("Reading $readMax bytes returned only $readBytes bytes"))
innerOffset += readBytes
return b
}
override fun read(b: ByteArray, off: Int, len: Int): Int { override fun read(b: ByteArray, off: Int, len: Int): Int {
Objects.checkFromIndexSize(off, len, b.size) Objects.checkFromIndexSize(off, len, b.size)
@ -116,9 +136,8 @@ class StarboundPak(val path: File, callback: (finished: Boolean, status: String)
reader.seek(innerOffset + offset) reader.seek(innerOffset + offset)
val readBytes = reader.read(b, off, readMax) val readBytes = reader.read(b, off, readMax)
if (readBytes == -1) { if (readBytes == -1)
throw RuntimeException("Unexpected EOF, want to read $readMax bytes from starting $offset in $path") throw RuntimeException("Unexpected EOF, want to read $readMax bytes from starting $offset in $path")
}
innerOffset += readBytes innerOffset += readBytes
return readBytes return readBytes