stage0/stage2/High_level_prototypes/lisp_print.c

59 lines
1.4 KiB
C

/* Copyright (C) 2016 Jeremiah Orians
* This file is part of stage0.
*
* stage0 is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* stage0 is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with stage0. If not, see <http://www.gnu.org/licenses/>.
*/
#include "lisp.h"
void writeobj(FILE *ofp, struct cell* op)
{
switch(op->type)
{
case INT: fprintf(ofp, "%d", op->value); break;
case CONS:
{
fprintf(ofp, "(");
for(;;)
{
writeobj(ofp, op->car);
if(nil == op->cdr)
{
fprintf(ofp, ")");
break;
}
op = op->cdr;
if(op->type != CONS)
{
fprintf(ofp, " . ");
writeobj(ofp, op);
fprintf(ofp, ")");
break;
}
fprintf(ofp, " ");
}
break;
}
case SYM:
{
fprintf(ofp, "%s", op->string);
break;
}
case PRIMOP: fprintf(ofp, "#<PRIMOP>"); break;
case PROC: fprintf(ofp, "#<PROC>"); break;
case ASCII: fprintf(ofp, "%c", op->value); break;
default: exit(1);
}
}