readTwosComplement
Read the value of x from buffer.
Asserts that buffer is large enough to contain a value of bit-size bit_count.
The contents of buffer are interpreted as if they were the contents of
@ptrCast(*[buffer.len]const u8, &x). Byte ordering is determined by endian
and any required padding bits are expected on the MSB end.
Function parameters
Parameters
- x:*Mutable
- buffer:[]const u8
- bit_count:usize
Used to indicate either limit of a 2s-complement integer.
Types
- TwosCompIntLimit
- Used to indicate either limit of a 2s-complement integer.
- Mutable
- A arbitrary-precision big integer, with a fixed set of mutable limbs.
- Const
- A arbitrary-precision big integer, with a fixed set of immutable limbs.
- Managed
- An arbitrary-precision big integer along with an allocator which manages the memory.
Returns the number of limbs needed to store `scalar`, which must be a
Functions
- calcLimbLen
- Returns the number of limbs needed to store `scalar`, which must be a
- calcSetStringLimbCount
- Assumes `string_len` doesn't account for minus signs if the number is negative.
- calcNonZeroTwosCompLimbCount
- Compute the number of limbs required to store a 2s-complement number of `bit_count` bits.
- calcTwosCompLimbCount
- Compute the number of limbs required to store a 2s-complement number of `bit_count` bits.
- addMulLimbWithCarry
- a + b * c + *carry, sets carry to the overflow bits
- llcmp
- Returns -1, 0, 1 if |a| < |b|, |a| == |b| or |a| > |b| respectively for limbs.
Source
Implementation
pub fn readTwosComplement(
x: *Mutable,
buffer: []const u8,
bit_count: usize,
endian: Endian,
signedness: Signedness,
) void {
return readPackedTwosComplement(x, buffer, 0, bit_count, endian, signedness);
}