41 lines
732 B
Go
41 lines
732 B
Go
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package leb128
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import (
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"bytes"
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)
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// Read unsigned leb128, no error
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func ReadULEB(buf *bytes.Buffer) (uint, uint) {
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result := uint(0)
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shift := uint(0)
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bytes_read := uint(0)
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for {
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b, _ := buf.ReadByte()
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bytes_read += 1
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result |= uint(b&0b0111_1111) << shift
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shift += 7
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if (b & 0b1000_0000) == 0 {
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return result, bytes_read
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}
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}
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}
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// Read signed leb128, no error
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func ReadSLEB(buf *bytes.Buffer) (int, uint) {
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result := int(0)
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shift := uint(0)
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bytes_read := uint(0)
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for {
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b, _ := buf.ReadByte()
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bytes_read += 1
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result |= int(b&0b0111_1111) << shift
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shift += 7
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if (b & 0b1000_0000) == 0 {
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if b&0x40 != 0 {
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return result | (-1 << shift), bytes_read
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}
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return result, bytes_read
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}
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}
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}
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