use C macro to implement matrix template

1 files changed, 26 insertions, 0 deletions

diff --git a/matrix/matrix.c b/matrix/matrix.c
new file mode 100644
index 0000000..3a593e5
--- /dev/null
+++ b/matrix/matrix.c
@@ -0,0 +1,26 @@
+#define MATRIX_DATA_FREE(ptr) free(ptr)
+#define MATRIX_DATA_ALLOC(size) malloc(size)
+#define MATRIX_DATA_STRIDE(ncol) (sizeof(float) * (ncol))
+#define MATRIX_GENERIC
+#define nerv_float_matrix_(NAME) nerv_float_matrix_host_ ## NAME
+#include "generic/matrix.c"
+
+int nerv_float_matrix_(get_elem)(lua_State *L) {
+    Matrix *self = luaT_checkudata(L, 1, nerv_float_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_float_matrix_(set_elem)(lua_State *L) {
+    Matrix *self = luaT_checkudata(L, 1, nerv_float_matrix_tname);
+    int idx = luaL_checkinteger(L, 2);
+    float v = luaL_checknumber(L, 3);
+    long upper = self->nrow * self->ncol;
+    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;
+}