Some generic functions over Lua objects

1 files changed, 68 insertions, 0 deletions

diff --git a/lobject.c b/lobject.c
new file mode 100644
index 00000000..b9cabb0b
--- /dev/null
+++ b/lobject.c
@@ -0,0 +1,68 @@
+/*
+** $Id: $
+** Some generic functions over Lua objects
+** See Copyright Notice in lua.h
+*/
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "lobject.h"
+#include "lua.h"
+
+
+char *luaO_typenames[] = { /* ORDER LUA_T */
+  "userdata", "line", "cmark", "mark", "function", "function",
+  "prototype", "table", "string", "number", "nil",
+  NULL
+};
+
+
+long luaO_nentities = 0;
+
+
+/* hash dimensions values */
+static long dimensions[] =
+ {5L, 11L, 23L, 47L, 97L, 197L, 397L, 797L, 1597L, 3203L, 6421L,
+  12853L, 25717L, 51437L, 102811L, 205619L, 411233L, 822433L,
+  1644817L, 3289613L, 6579211L, 13158023L, MAX_INT};
+
+
+int luaO_redimension (int oldsize)
+{
+  int i;
+  for (i=0; dimensions[i]<MAX_INT; i++) {
+    if (dimensions[i] > oldsize)
+      return dimensions[i];
+  }
+  lua_error("table overflow");
+  return 0;  /* to avoid warnings */
+}
+
+
+int luaO_equalObj (TObject *t1, TObject *t2)
+{
+  if (ttype(t1) != ttype(t2)) return 0;
+  switch (ttype(t1)) {
+    case LUA_T_NIL: return 1;
+    case LUA_T_NUMBER: return nvalue(t1) == nvalue(t2);
+    case LUA_T_STRING: case LUA_T_USERDATA: return svalue(t1) == svalue(t2);
+    case LUA_T_ARRAY: return avalue(t1) == avalue(t2);
+    case LUA_T_FUNCTION: return t1->value.cl == t2->value.cl;
+    case LUA_T_CFUNCTION: return fvalue(t1) == fvalue(t2);
+    default:
+     lua_error("internal error in `lua_equalObj'");
+     return 0; /* UNREACHEABLE */
+  }
+}
+
+
+int luaO_findstring (char *name, char *list[])
+{
+  int i;
+  for (i=0; list[i]; i++)
+    if (strcmp(list[i], name) == 0)
+      return i;
+  return -1;  /* name not found */
+}
+