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- #include "scheme.h"
-
- /* zelk needs these variables to be global */
- /*static*/ Object V_Load_Path, V_Load_Noisilyp, V_Load_Libraries;
-
- #ifdef CAN_LOAD_OBJ
- # define Default_Load_Libraries LOAD_LIBRARIES
- #else
- # define Default_Load_Libraries ""
- #endif
-
- #if defined(CAN_DUMP) || defined(USE_LD)
- char Loader_Input[20];
- #endif
-
- #ifdef USE_LD
- # include "load.ld.c"
- #else
- #ifdef USE_RLD
- # include "load.rld.c"
- #else
- #ifdef USE_SHL
- # include "load.shl.c"
- #endif
- #endif
- #endif
-
- Init_Load () {
- Define_Variable (&V_Load_Path, "load-path",
- Cons (Make_String (".", 1),
- Cons (Make_String (SCM_DIR, sizeof (SCM_DIR) - 1),
- Cons (Make_String (LIB_DIR, sizeof (LIB_DIR) - 1), Null))));
- Define_Variable (&V_Load_Noisilyp, "load-noisily?", False);
- Define_Variable (&V_Load_Libraries, "load-libraries",
- Make_String (Default_Load_Libraries, sizeof Default_Load_Libraries-1));
- }
-
- Init_Loadpath (s) char *s; { /* No GC possible here */
- register char *p;
- Object path = Null;
-
- if (s[0] == '\0')
- return;
- while (1) {
- for (p = s; *p && *p != ','; p++)
- ;
- path = Cons (Make_String (s, p-s), path);
- if (*p == '\0')
- break;
- s = ++p;
- }
- Var_Set (V_Load_Path, path);
- }
-
- Object Is_O_File (name) Object name; {
- register char *p;
- register struct S_String *str;
-
- if (TYPE(name) == T_Symbol)
- name = SYMBOL(name)->name;
- str = STRING(name);
- p = str->data + str->size;
- return str->size >= 2 && *--p == 'o' && *--p == '.';
- }
-
- void Check_Loadarg (x) Object x; {
- Object tail;
- register t = TYPE(x);
-
- if (t == T_Symbol || t == T_String)
- return;
- if (t != T_Pair)
- Wrong_Type_Combination (x, "string, symbol, or list");
- for (tail = x; !Nullp (tail); tail = Cdr (tail)) {
- Object f = Car (tail);
- if (TYPE(f) != T_Symbol && TYPE(f) != T_String)
- Wrong_Type_Combination (f, "string or symbol");
- if (!Is_O_File (f))
- Primitive_Error ("~s: not an object file", f);
- }
- }
-
- Object General_Load (what, env) Object what, env; {
- Object oldenv;
- GC_Node;
-
- Check_Type (env, T_Environment);
- oldenv = The_Environment;
- GC_Link (oldenv);
- Switch_Environment (env);
- Check_Loadarg (what);
- if (TYPE(what) == T_Pair)
- #ifdef CAN_LOAD_OBJ
- Load_Object (what)
- #endif
- ;
- else if (Is_O_File (what))
- #ifdef CAN_LOAD_OBJ
- Load_Object (Cons (what, Null))
- #endif
- ;
- else
- Load_Source (what);
- Switch_Environment (oldenv);
- GC_Unlink;
- return Void;
- }
-
- Object P_Load (argc, argv) Object *argv; {
- return General_Load (argv[0], argc == 1 ? The_Environment : argv[1]);
- }
-
- Load_Source_Port (port) Object port; {
- Object val;
- GC_Node;
-
- GC_Link (port);
- while (1) {
- val = General_Read (port, 1);
- if (TYPE(val) == T_End_Of_File)
- break;
- val = Eval (val);
- if (Truep (Var_Get (V_Load_Noisilyp))) {
- Print (val);
- (void)P_Newline (0, (Object *)0);
- }
- }
- GC_Unlink;
- }
-
- Load_Source (name) Object name; {
- Object port;
- GC_Node;
-
- port = General_Open_File (name, P_INPUT, Var_Get (V_Load_Path));
- GC_Link (port);
- Load_Source_Port (port);
- (void)P_Close_Input_Port (port);
- GC_Unlink;
- }
-