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Andrew Stone
20 lines
954 B
Markdown
20 lines
954 B
Markdown
A "compact int" is serialized as follows:
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*If the number < 253, store it in 1 byte
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*If the number fits in 16 bits: store a 1 byte value 253, and the 2 byte little-endian number.
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| 0 | 1 | 2 |
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|--------|---------|---------|
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| 0xfd | val&255 | val>>8 |
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* If the number fits in 32 bits (but not 8 or 16): store a 1 byte value 254, and the 4 byte little-endian number
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| 0 | 1 | 2 | 3 | 4 |
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|--------|---------|---------|---------|---------|
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| 0xfe | val&255 | (val>>8)&255 | (val>>16)&255 | (val>>24)&255 |
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* If the number fits in 64 bits (but not 8, 16, or 32): store a 1 byte value 255 and the 8 byte little-endian number
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| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
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|--------|---------|---------|---------|---------|---------|---------|---------|--------|
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| 0xff | val&255 | val>>8 | val>>16 | val>>24 | val>>32 | val>>40 | val>>48 | val>>56 | |