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Annotation of GNUtools/emacs/src/mocklisp.c, revision 1.1

1.1     ! root        1: /* Mocklisp compatibility functions for GNU Emacs Lisp interpreter.
        !             2:    Copyright (C) 1985, 1986 Free Software Foundation, Inc.
        !             3: 
        !             4: This file is part of GNU Emacs.
        !             5: 
        !             6: GNU Emacs is free software; you can redistribute it and/or modify
        !             7: it under the terms of the GNU General Public License as published by
        !             8: the Free Software Foundation; either version 1, or (at your option)
        !             9: any later version.
        !            10: 
        !            11: GNU Emacs is distributed in the hope that it will be useful,
        !            12: but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            14: GNU General Public License for more details.
        !            15: 
        !            16: You should have received a copy of the GNU General Public License
        !            17: along with GNU Emacs; see the file COPYING.  If not, write to
        !            18: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
        !            19: 
        !            20: 
        !            21: /* Compatibility for mocklisp */
        !            22: 
        !            23: #include "config.h"
        !            24: #include "lisp.h"
        !            25: #include "buffer.h"
        !            26: 
        !            27: /* Now in lisp code ("macrocode...")
        !            28: * DEFUN ("ml-defun", Fml_defun, Sml_defun, 0, UNEVALLED, 0,
        !            29: *  "Define mocklisp functions")
        !            30: *  (args)
        !            31: *     Lisp_Object args;
        !            32: * {
        !            33: *  Lisp_Object elt;
        !            34: *
        !            35: *   while (!NULL (args))
        !            36: *     {
        !            37: *       elt = Fcar (args);
        !            38: *       Ffset (Fcar (elt), Fcons (Qmocklisp, Fcdr (elt)));
        !            39: *       args = Fcdr (args);
        !            40: *     }
        !            41: *   return Qnil;
        !            42: * }
        !            43: */
        !            44: 
        !            45: DEFUN ("ml-if", Fml_if, Sml_if, 0, UNEVALLED, 0, "if  for mocklisp programs")
        !            46:   (args)
        !            47:      Lisp_Object args;
        !            48: {
        !            49:   register Lisp_Object val;
        !            50:   struct gcpro gcpro1;
        !            51: 
        !            52:   GCPRO1 (args);
        !            53:   while (!NULL (args))
        !            54:     {
        !            55:       val = Feval (Fcar (args));
        !            56:       args = Fcdr (args);
        !            57:       if (NULL (args)) break;
        !            58:       if (XINT (val))
        !            59:        {
        !            60:          val = Feval (Fcar (args));
        !            61:          break;
        !            62:        }
        !            63:       args = Fcdr (args);
        !            64:     }
        !            65:   UNGCPRO;
        !            66:   return val;
        !            67: }
        !            68: 
        !            69: /* Now converted to regular "while" by hairier conversion code.
        !            70: * DEFUN ("ml-while", Fml_while, Sml_while, 1, UNEVALLED, 0, "while  for mocklisp programs")
        !            71: *   (args)
        !            72: *      Lisp_Object args;
        !            73: * {
        !            74: *   Lisp_Object test, body, tem;
        !            75: *   struct gcpro gcpro1, gcpro2;
        !            76: *
        !            77: *   GCPRO2 (test, body);
        !            78: *
        !            79: *   test = Fcar (args);
        !            80: *   body = Fcdr (args);
        !            81: *   while (tem = Feval (test), XINT (tem))
        !            82: *     {
        !            83: *       QUIT;
        !            84: *       Fprogn (body);
        !            85: *    }
        !            86: *
        !            87: *   UNGCPRO;
        !            88: *   return Qnil;
        !            89: *}
        !            90: 
        !            91: /* This is the main entry point to mocklisp execution.
        !            92:  When eval sees a mocklisp function being called, it calls here
        !            93:  with the unevaluated argument list */
        !            94: 
        !            95: Lisp_Object
        !            96: ml_apply (function, args)
        !            97:      Lisp_Object function, args;
        !            98: {
        !            99:   register int count = specpdl_ptr - specpdl;
        !           100:   register Lisp_Object val;
        !           101: 
        !           102:   specbind (Qmocklisp_arguments, args);
        !           103:   val = Fprogn (Fcdr (function));
        !           104:   unbind_to (count);
        !           105:   return val;
        !           106: }
        !           107: 
        !           108: DEFUN ("ml-nargs", Fml_nargs, Sml_nargs, 0, 0, 0, "# arguments to this mocklisp function")
        !           109:   ()
        !           110: {
        !           111:   if (EQ (Vmocklisp_arguments, Qinteractive))
        !           112:     return make_number (0);
        !           113:   return Flength (Vmocklisp_arguments);
        !           114: }
        !           115: 
        !           116: DEFUN ("ml-arg", Fml_arg, Sml_arg, 1, 2, 0, "Argument #N to this mocklisp function.")
        !           117:   (n, prompt)
        !           118:      Lisp_Object n, prompt;
        !           119: {
        !           120:   if (EQ (Vmocklisp_arguments, Qinteractive))
        !           121:     return Fread_string (prompt, Qnil);
        !           122:   CHECK_NUMBER (n, 0);
        !           123:   XSETINT (n, XINT (n) - 1);   /* Mocklisp likes to be origin-1 */
        !           124:   return Fcar (Fnthcdr (n, Vmocklisp_arguments));
        !           125: }
        !           126: 
        !           127: DEFUN ("ml-interactive", Fml_interactive, Sml_interactive, 0, 0, 0,
        !           128:  "True if this mocklisp function was called interactively.")
        !           129:   ()
        !           130: {
        !           131:   return (EQ (Vmocklisp_arguments, Qinteractive)) ? Qt : Qnil;
        !           132: }
        !           133: 
        !           134: DEFUN ("ml-provide-prefix-argument", Fml_provide_prefix_argument, Sml_provide_prefix_argument,
        !           135:   2, UNEVALLED, 0,
        !           136:   "Evaluate second argument, using first argument as prefix arg value.")
        !           137:   (args)
        !           138:      Lisp_Object args;
        !           139: {
        !           140:   struct gcpro gcpro1;
        !           141:   GCPRO1 (args);
        !           142:   Vcurrent_prefix_arg = Feval (Fcar (args));
        !           143:   UNGCPRO;
        !           144:   return Feval (Fcar (Fcdr (args)));
        !           145: }
        !           146: 
        !           147: DEFUN ("ml-prefix-argument-loop", Fml_prefix_argument_loop, Sml_prefix_argument_loop,
        !           148:        0, UNEVALLED, 0,
        !           149:   "")
        !           150:   (args)
        !           151:      Lisp_Object args;
        !           152: {
        !           153:   register Lisp_Object tem;
        !           154:   register int i;
        !           155:   struct gcpro gcpro1;
        !           156: 
        !           157:   /* Set `arg' in case we call a built-in function that looks at it.  Still are a few. */
        !           158:   if (NULL (Vcurrent_prefix_arg))
        !           159:     i = 1;
        !           160:   else
        !           161:     {
        !           162:       tem = Vcurrent_prefix_arg;
        !           163:       if (CONSP (tem))
        !           164:        tem = Fcar (tem);
        !           165:       if (EQ (tem, Qminus))
        !           166:        i = -1;
        !           167:       else i = XINT (tem);
        !           168:     }
        !           169: 
        !           170:   GCPRO1 (args);
        !           171:   while (i-- > 0)
        !           172:     Fprogn (args);
        !           173:   UNGCPRO;
        !           174:   return Qnil;
        !           175: }
        !           176: 
        !           177: #ifdef NOTDEF /* Now in mlsupport.el */
        !           178: 
        !           179: DEFUN ("ml-substr", Fml_substr, Sml_substr, 3, 3, 0,
        !           180:   "Return a substring of STRING, starting at index FROM and of length LENGTH.\n\
        !           181: If either FROM or LENGTH is negative, the length of STRING is added to it.")
        !           182:   (string, from, to)
        !           183:      Lisp_Object string, from, to;
        !           184: {
        !           185:   CHECK_STRING (string, 0);
        !           186:   CHECK_NUMBER (from, 1);
        !           187:   CHECK_NUMBER (to, 2);
        !           188: 
        !           189:   if (XINT (from) < 0)
        !           190:     XSETINT (from, XINT (from) + XSTRING (string)->size);
        !           191:   if (XINT (to) < 0)
        !           192:     XSETINT (to, XINT (to) + XSTRING (string)->size);
        !           193:   XSETINT (to, XINT (to) + XINT (from));
        !           194:   return Fsubstring (string, from, to);
        !           195: }
        !           196: #endif NOTDEF
        !           197: DEFUN ("insert-string", Finsert_string, Sinsert_string, 0, MANY, 0,
        !           198:   "Mocklisp-compatibility insert function.\n\
        !           199: Like the function `insert' except that any argument that is a number\n\
        !           200: is converted into a string by expressing it in decimal.")
        !           201:   (nargs, args)
        !           202:      int nargs;
        !           203:      Lisp_Object *args;
        !           204: {
        !           205:   register int argnum;
        !           206:   register Lisp_Object tem;
        !           207: 
        !           208:   for (argnum = 0; argnum < nargs; argnum++)
        !           209:     {
        !           210:       tem = args[argnum];
        !           211:     retry:
        !           212:       if (XTYPE (tem) == Lisp_Int)
        !           213:        tem = Fint_to_string (tem);
        !           214:       if (XTYPE (tem) == Lisp_String)
        !           215:        {
        !           216:          insert (XSTRING (tem)->data, XSTRING (tem)->size);
        !           217:        }
        !           218:       else
        !           219:        {
        !           220:          tem = wrong_type_argument (Qstringp, tem);
        !           221:          goto retry;
        !           222:        }
        !           223:     }
        !           224:   return Qnil;
        !           225: }
        !           226: 
        !           227: 
        !           228: syms_of_mocklisp ()
        !           229: {
        !           230:   Qmocklisp = intern ("mocklisp");
        !           231:   staticpro (&Qmocklisp);
        !           232: 
        !           233: /*defsubr (&Sml_defun);*/
        !           234:   defsubr (&Sml_if);
        !           235: /*defsubr (&Sml_while);*/
        !           236:   defsubr (&Sml_arg);
        !           237:   defsubr (&Sml_nargs);
        !           238:   defsubr (&Sml_interactive);
        !           239:   defsubr (&Sml_provide_prefix_argument);
        !           240:   defsubr (&Sml_prefix_argument_loop);
        !           241: /*defsubr (&Sml_substr);*/
        !           242:   defsubr (&Sinsert_string);
        !           243: }

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