#ifdef NERV_GENERIC_MMATRIX
#include "matrix.h"
#include "elem_type.h"
#define MATRIX_DATA_FREE(ptr) free(ptr)
#define MATRIX_DATA_ALLOC(dptr, stride, width, height) \
                            host_matrix_(alloc)(dptr, stride, width, height)
#define MATRIX_DATA_STRIDE(ncol) (sizeof(float) * (ncol))
#define MATRIX_DATA_WRITE(data, idx, val) (data[idx] = val)
#define MATRIX_DATA_READ(data, idx) (data[idx])
#define NERV_GENERIC_MATRIX
#include "../../common.h"

const char *nerv_matrix_(tname) = "nerv.FloatMMatrix";

static void host_matrix_(alloc)(float **dptr, size_t *stride,
                                    long width, long height) {
    *dptr = (float *)malloc(width * height);
    *stride = width;
}

int nerv_matrix_(get_elem)(lua_State *L) {
    Matrix *self = luaT_checkudata(L, 1, nerv_matrix_(tname));
    int idx = luaL_checkinteger(L, 2);
    if (idx < 0 || idx >= self->nmax)
        nerv_error(L, "index must be within range [0, %d)", self->nmax);
    lua_pushnumber(L, self->data.f[idx]);
    return 1;
}

int nerv_matrix_(set_elem)(lua_State *L) {
    Matrix *self = luaT_checkudata(L, 1, nerv_matrix_(tname));
    int idx = luaL_checkinteger(L, 2);
    float v = luaL_checknumber(L, 3);
    if (idx < 0 || idx >= self->nmax)
        nerv_error(L, "index must be within range [0, %d)", self->nmax);
    self->data.f[idx] = v;
    return 0;
}

#include "matrix.c"
#endif