Description
Return offset alignment remainder and required padding.
Bit positions are usually counted from the least-significant bit, while a displayed binary string has its own left-to-right indexing convention. Masks, fields and parity predicates describe a selected region or pattern; local agreement does not validate a complete encoded record.
Return offset alignment remainder and required padding.
When to use this tool
Use Bitfield Offset Alignment Remainder when checking the stated mask, field, parity or bit-index convention.
How to use the tool and how it works
- Enter offset, alignment. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read remainder, padding, aligned. Inspect aligned before interpreting the associated values.
Return offset alignment remainder and required padding. Require whole offset >= 0 and alignment >= 1; remainder = offset modulo alignment, padding is zero when aligned or alignment-remainder otherwise.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| offset | Offset | Required. Safe integer; minimum 0. |
| alignment | Alignment | Required. Safe integer; minimum 1. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| remainder | Remainder | Required. Safe integer. |
| padding | Padding | Required. Safe integer. |
| aligned | Aligned | Required. Boolean. |
{
"input": {
"offset": 13,
"alignment": 8
},
"output": {
"remainder": 5,
"padding": 3,
"aligned": false
}
}Limitations and assumptions
- Units must match and alignment need not be a power of two; no memory, file or device layout is accessed.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Choose an explicit bit order, word width and missing-position policy; use the complete record format and appropriate parsing or checksum methods for full validation.
References
Similar or alternative tools
- Bitfield Insert Preservation Mask
Return complementary insertion and preservation masks.
- Bitwise: Bitfield Width From Endpoints
Return field width from inclusive bit endpoints.