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Annotation of 43BSD/contrib/emacs/src/mocklisp.c, revision 1.1

1.1     ! root        1: /* Mocklisp compatibility functions for GNU Emacs Lisp interpreter.
        !             2:    Copyright (C) 1985 Richard M. Stallman.
        !             3: 
        !             4: This file is part of GNU Emacs.
        !             5: 
        !             6: GNU Emacs is distributed in the hope that it will be useful,
        !             7: but WITHOUT ANY WARRANTY.  No author or distributor
        !             8: accepts responsibility to anyone for the consequences of using it
        !             9: or for whether it serves any particular purpose or works at all,
        !            10: unless he says so in writing.  Refer to the GNU Emacs General Public
        !            11: License for full details.
        !            12: 
        !            13: Everyone is granted permission to copy, modify and redistribute
        !            14: GNU Emacs, but only under the conditions described in the
        !            15: GNU Emacs General Public License.   A copy of this license is
        !            16: supposed to have been given to you along with GNU Emacs so you
        !            17: can know your rights and responsibilities.  It should be in a
        !            18: file named COPYING.  Among other things, the copyright notice
        !            19: and this notice must be preserved on all copies.  */
        !            20: 
        !            21: 
        !            22: /* Compatibility for mocklisp */
        !            23: 
        !            24: #include "config.h"
        !            25: #include "lisp.h"
        !            26: #include "buffer.h"
        !            27: 
        !            28: /* Now in lisp code ("macrocode...")
        !            29: * DEFUN ("ml-defun", Fml_defun, Sml_defun, 0, UNEVALLED, 0,
        !            30: *  "Define mocklisp functions")
        !            31: *  (args)
        !            32: *     Lisp_Object args;
        !            33: * {
        !            34: *  Lisp_Object elt;
        !            35: *
        !            36: *   while (!NULL (args))
        !            37: *     {
        !            38: *       elt = Fcar (args);
        !            39: *       Ffset (Fcar (elt), Fcons (Qmocklisp, Fcdr (elt)));
        !            40: *       args = Fcdr (args);
        !            41: *     }
        !            42: *   return Qnil;
        !            43: * }
        !            44: */
        !            45: 
        !            46: DEFUN ("ml-if", Fml_if, Sml_if, 0, UNEVALLED, 0, "if  for mocklisp programs")
        !            47:   (args)
        !            48:      Lisp_Object args;
        !            49: {
        !            50:   register Lisp_Object val;
        !            51:   struct gcpro gcpro1;
        !            52: 
        !            53:   GCPRO1 (args);
        !            54:   while (!NULL (args))
        !            55:     {
        !            56:       val = Feval (Fcar (args));
        !            57:       args = Fcdr (args);
        !            58:       if (NULL (args)) break;
        !            59:       if (XINT (val))
        !            60:        {
        !            61:          val = Feval (Fcar (args));
        !            62:          break;
        !            63:        }
        !            64:       args = Fcdr (args);
        !            65:     }
        !            66:   UNGCPRO;
        !            67:   return val;
        !            68: }
        !            69: 
        !            70: /* Now converted to regular "while" by hairier conversion code.
        !            71: * DEFUN ("ml-while", Fml_while, Sml_while, 1, UNEVALLED, 0, "while  for mocklisp programs")
        !            72: *   (args)
        !            73: *      Lisp_Object args;
        !            74: * {
        !            75: *   Lisp_Object test, body, tem;
        !            76: *   struct gcpro gcpro1, gcpro2;
        !            77: *
        !            78: *   GCPRO2 (test, body);
        !            79: *
        !            80: *   test = Fcar (args);
        !            81: *   body = Fcdr (args);
        !            82: *   while (tem = Feval (test), XINT (tem))
        !            83: *     {
        !            84: *       QUIT;
        !            85: *       Fprogn (body);
        !            86: *    }
        !            87: *
        !            88: *   UNGCPRO;
        !            89: *   return Qnil;
        !            90: *}
        !            91: 
        !            92: /* This is the main entry point to mocklisp execution.
        !            93:  When eval sees a mocklisp function being called, it calls here
        !            94:  with the unevaluated argument list */
        !            95: 
        !            96: Lisp_Object
        !            97: ml_apply (function, args)
        !            98:      Lisp_Object function, args;
        !            99: {
        !           100:   register int count = specpdl_ptr - specpdl;
        !           101:   register Lisp_Object val;
        !           102: 
        !           103:   specbind (Qmocklisp_arguments, args);
        !           104:   val = Fprogn (Fcdr (function));
        !           105:   unbind_to (count);
        !           106:   return val;
        !           107: }
        !           108: 
        !           109: DEFUN ("ml-nargs", Fml_nargs, Sml_nargs, 0, 0, 0, "# arguments to this mocklisp function")
        !           110:   ()
        !           111: {
        !           112:   if (EQ (Vmocklisp_arguments, Qinteractive))
        !           113:     return make_number (0);
        !           114:   return Flength (Vmocklisp_arguments);
        !           115: }
        !           116: 
        !           117: DEFUN ("ml-arg", Fml_arg, Sml_arg, 1, 2, 0, "Argument #N to this mocklisp function.")
        !           118:   (n, prompt)
        !           119:      Lisp_Object n, prompt;
        !           120: {
        !           121:   if (EQ (Vmocklisp_arguments, Qinteractive))
        !           122:     return Fread_string (prompt, Qnil);
        !           123:   CHECK_NUMBER (n, 0);
        !           124:   XSETINT (n, XINT (n) - 1);   /* Mocklisp likes to be origin-1 */
        !           125:   return Fcar (Fnthcdr (n, Vmocklisp_arguments));
        !           126: }
        !           127: 
        !           128: DEFUN ("ml-interactive", Fml_interactive, Sml_interactive, 0, 0, 0,
        !           129:  "True if this mocklisp function was called interactively.")
        !           130:   ()
        !           131: {
        !           132:   return (EQ (Vmocklisp_arguments, Qinteractive)) ? Qt : Qnil;
        !           133: }
        !           134: 
        !           135: DEFUN ("ml-provide-prefix-argument", Fml_provide_prefix_argument, Sml_provide_prefix_argument,
        !           136:   2, UNEVALLED, 0,
        !           137:   "Evaluate second argument, using first argument as prefix arg value.")
        !           138:   (args)
        !           139:      Lisp_Object args;
        !           140: {
        !           141:   struct gcpro gcpro1;
        !           142:   GCPRO1 (args);
        !           143:   Vcurrent_prefix_arg = Feval (Fcar (args));
        !           144:   UNGCPRO;
        !           145:   return Feval (Fcar (Fcdr (args)));
        !           146: }
        !           147: 
        !           148: DEFUN ("ml-prefix-argument-loop", Fml_prefix_argument_loop, Sml_prefix_argument_loop,
        !           149:        0, UNEVALLED, 0,
        !           150:   "")
        !           151:   (args)
        !           152:      Lisp_Object args;
        !           153: {
        !           154:   register Lisp_Object tem;
        !           155:   register int i;
        !           156:   struct gcpro gcpro1;
        !           157: 
        !           158:   /* Set `arg' in case we call a built-in function that looks at it.  Still are a few. */
        !           159:   if (NULL (Vcurrent_prefix_arg))
        !           160:     i = 1;
        !           161:   else
        !           162:     {
        !           163:       tem = Vcurrent_prefix_arg;
        !           164:       if (LISTP (tem))
        !           165:        tem = Fcar (tem);
        !           166:       if (EQ (tem, Qminus))
        !           167:        i = -1;
        !           168:       else i = XINT (tem);
        !           169:     }
        !           170: 
        !           171:   GCPRO1 (args);
        !           172:   while (i-- > 0)
        !           173:     Fprogn (args);
        !           174:   UNGCPRO;
        !           175:   return Qnil;
        !           176: }
        !           177: 
        !           178: DEFUN ("ml-substr", Fml_substr, Sml_substr, 3, 3, 0,
        !           179:   "Return a substring of STRING, starting at index FROM and of length LENGTH.\n\
        !           180: If either FROM or LENGTH is negative, the length of STRING is added to it.")
        !           181:   (string, from, to)
        !           182:      Lisp_Object string, from, to;
        !           183: {
        !           184:   CHECK_STRING (string, 0);
        !           185:   CHECK_NUMBER (from, 1);
        !           186:   CHECK_NUMBER (to, 2);
        !           187: 
        !           188:   if (XINT (from) < 0)
        !           189:     XSETINT (from, XINT (from) + XSTRING (string)->size);
        !           190:   if (XINT (to) < 0)
        !           191:     XSETINT (to, XINT (to) + XSTRING (string)->size);
        !           192:   XSETINT (to, XINT (to) + XINT (from));
        !           193:   return Fsubstring (string, from, to);
        !           194: }
        !           195: 
        !           196: DEFUN ("insert-string", Finsert_string, Sinsert_string, 0, MANY, 0,
        !           197:   "Insert the arguments (all strings) into the buffer, moving point forward.\n\
        !           198: Any argument that is a number is converted to a string by printing it in decimal.")
        !           199:   (nargs, args)
        !           200:      int nargs;
        !           201:      Lisp_Object *args;
        !           202: {
        !           203:   register int argnum;
        !           204:   register Lisp_Object tem;
        !           205: 
        !           206:   for (argnum = 0; argnum < nargs; argnum++)
        !           207:     {
        !           208:       tem = args[argnum];
        !           209:     retry:
        !           210:       if (XTYPE (tem) == Lisp_Int)
        !           211:        tem = Fint_to_string (tem);
        !           212:       if (XTYPE (tem) == Lisp_String)
        !           213:        {
        !           214:          InsCStr (XSTRING (tem)->data, XSTRING (tem)->size);
        !           215:        }
        !           216:       else
        !           217:        {
        !           218:          tem = wrong_type_argument (Qstringp, tem);
        !           219:          goto retry;
        !           220:        }
        !           221:     }
        !           222:   return Qnil;
        !           223: }
        !           224: 
        !           225: 
        !           226: syms_of_mocklisp ()
        !           227: {
        !           228:   Qmocklisp = intern ("mocklisp");
        !           229:   staticpro (&Qmocklisp);
        !           230: 
        !           231: /*defsubr (&Sml_defun);*/
        !           232:   defsubr (&Sml_if);
        !           233: /*defsubr (&Sml_while);*/
        !           234:   defsubr (&Sml_arg);
        !           235:   defsubr (&Sml_nargs);
        !           236:   defsubr (&Sml_interactive);
        !           237:   defsubr (&Sml_provide_prefix_argument);
        !           238:   defsubr (&Sml_prefix_argument_loop);
        !           239:   defsubr (&Sml_substr);
        !           240:   defsubr (&Sinsert_string);
        !           241: }

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