Crate superinstance_ffi 

Functions

si_cascade_match

Cascade matching: count matching bytes between query and a single codebook entry. Returns number of matching positions.

si_constraint_check

Count how many constraint bounds are violated. vals[i] must be <= bounds[i] for satisfaction. Returns count of violations.

si_deadband_filter

Deadband filter: if val is within band of center, return center. Otherwise return val (pass through).

si_eisenstein_norm

Eisenstein integer norm: a² - ab + b²

si_holonomy_check

Check holonomy: product of all transforms must equal 1 (identity) Each transform is a packed i64 representing a group element. For simplicity, we check if the cumulative XOR-based hash equals 0 or if the product of signed values equals 1.

si_is_rigid

Check if a graph with v vertices and e edges is rigid (Laman condition)

si_laman_edges

Laman graph edge count: 2v - 3

si_manhattan_distance

Manhattan distance between two integer vectors.

si_pythagorean48_encode

Quantize a 2D direction to one of 48 evenly-spaced angles (7.5° increments). Returns a u8 in [0, 47].

si_spline_interpolate

Linear interpolation along a polyline defined by control points. pts is a flat array of 2*n doubles (x0,y0, x1,y1, …). t is in [0, 1], mapping to the full arc length. For simplicity, this does uniform-parameter linear interpolation between segments.