add profiling; add ce accurarcy; several other changes

1 files changed, 29 insertions, 0 deletions

diff --git a/matrix/mmatrix.c b/matrix/mmatrix.c
index ab15197..81f8dfc 100644
--- a/matrix/mmatrix.c
+++ b/matrix/mmatrix.c
@@ -29,5 +29,34 @@ const char *nerv_matrix_(tname) = "nerv.MMatrixDouble";
 #define host_matrix_(NAME) host_matrix_int_##NAME
 #define nerv_matrix_(NAME) nerv_matrix_host_int_##NAME
 const char *nerv_matrix_(tname) = "nerv.MMatrixInt";
+#define MMATRIX_INIT(L) host_matrix_(init_extra)(L)
+
+static const luaL_Reg nerv_matrix_(extra_methods_int)[];
+static void host_matrix_(init_extra)(lua_State *L) {
+    luaN_append_methods(L, nerv_matrix_(extra_methods_int));
+}
+
 #include "generic/mmatrix.c"
 
+static int nerv_matrix_(perm_gen)(lua_State *L) {
+    int i, ncol = luaL_checkinteger(L, 1);
+    Matrix *self = nerv_matrix_(new_)(L, 1, ncol);
+    long *prow = self->data.i;
+    for (i = 0; i < ncol; i++)
+        prow[i] = i;
+    for (i = ncol - 1; i >= 0; i--)
+    {
+        size_t j = rand() % (i + 1);
+        long tmp = prow[i];
+        prow[i] = prow[j];
+        prow[j] = tmp;
+    }
+    luaT_pushudata(L, self, nerv_matrix_(tname));
+    return 1;
+}
+
+static const luaL_Reg nerv_matrix_(extra_methods_int)[] = {
+    {"perm_gen", nerv_matrix_(perm_gen)},
+    {NULL, NULL}
+};
+