/* eg_metal_cosine_stub.c — plain-C, zero-dependency implementation of the
 * eg_metal_cosine.h contract for platforms without Metal (Linux CI, or any
 * build that simply chooses not to link the real Objective-C bridge).
 *
 * Always returns false / unavailable. Callers already treat that as "fall
 * back to the CPU path" unconditionally — this file exists so that exactly
 * one of {eg_metal_cosine.m, eg_metal_cosine_stub.c} is linked per build,
 * selected by the build script (Darwin → the real bridge + Metal frameworks;
 * everything else → this stub, no framework flags, no Objective-C compiler
 * needed), and el_runtime.c / vindex_bench.c never need an #ifdef to call
 * eg_cosine_batch_metal() — the symbol always exists, its behavior is what
 * varies by platform.
 */
#include "eg_metal_cosine.h"

bool eg_cosine_batch_metal_available(void) {
    return false;
}

bool eg_cosine_batch_metal(const float* query, int32_t qdim,
                            const float* const* node_ptrs,
                            const int32_t* node_dims,
                            int32_t n,
                            double* out_scores) {
    (void)query; (void)qdim; (void)node_ptrs; (void)node_dims; (void)n; (void)out_scores;
    return false;
}

bool eg_cosine_batch_metal_multi(const float* queries, int32_t qdim, int32_t nq,
                                 const float* const* node_ptrs,
                                 const int32_t* node_dims,
                                 int32_t n,
                                 double* out_scores) {
    (void)queries; (void)qdim; (void)nq; (void)node_ptrs; (void)node_dims; (void)n; (void)out_scores;
    return false;
}