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   1 /*
   2  * Copyright © 2016 Keith Packard <keithp@keithp.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * General Public License for more details.
  13  */
  14
  15 #include "ao_lisp.h"
  16 #include <stdarg.h>
  17
  18 void
  19 ao_lisp_error_poly(char *name, ao_poly poly, ao_poly last)
  20 {
  21         int first = 1;
  22         printf("\t\t%s(", name);
  23         if (ao_lisp_poly_type(poly) == AO_LISP_CONS) {
  24                 if (poly) {
  25                         while (poly) {
  26                                 struct ao_lisp_cons *cons = ao_lisp_poly_cons(poly);
  27                                 if (!first)
  28                                         printf("\t\t         ");
  29                                 else
  30                                         first = 0;
  31                                 ao_lisp_poly_write(cons->car);
  32                                 printf("\n");
  33                                 if (poly == last)
  34                                         break;
  35                                 poly = cons->cdr;
  36                         }
  37                         printf("\t\t         )\n");
  38                 } else
  39                         printf(")\n");
  40         } else {
  41                 ao_lisp_poly_write(poly);
  42                 printf("\n");
  43         }
  44 }
  45
  46 static void tabs(int indent)
  47 {
  48         while (indent--)
  49                 printf("\t");
  50 }
  51
  52 void
  53 ao_lisp_error_frame(int indent, char *name, struct ao_lisp_frame *frame)
  54 {
  55         int                     f;
  56
  57         tabs(indent);
  58         printf ("%s{", name);
  59         if (frame) {
  60                 struct ao_lisp_frame_vals       *vals = ao_lisp_poly_frame_vals(frame->vals);
  61                 if (frame->type & AO_LISP_FRAME_PRINT)
  62                         printf("recurse...");
  63                 else {
  64                         frame->type |= AO_LISP_FRAME_PRINT;
  65                         for (f = 0; f < frame->num; f++) {
  66                                 if (f != 0) {
  67                                         tabs(indent);
  68                                         printf("         ");
  69                                 }
  70                                 ao_lisp_poly_write(vals->vals[f].atom);
  71                                 printf(" = ");
  72                                 ao_lisp_poly_write(vals->vals[f].val);
  73                                 printf("\n");
  74                         }
  75                         if (frame->prev)
  76                                 ao_lisp_error_frame(indent + 1, "prev:   ", ao_lisp_poly_frame(frame->prev));
  77                         frame->type &= ~AO_LISP_FRAME_PRINT;
  78                 }
  79                 tabs(indent);
  80                 printf("        }\n");
  81         } else
  82                 printf ("}\n");
  83 }
  84
  85
  86 ao_poly
  87 ao_lisp_error(int error, char *format, ...)
  88 {
  89         va_list args;
  90
  91         ao_lisp_exception |= error;
  92         va_start(args, format);
  93         vprintf(format, args);
  94         va_end(args);
  95         printf("\n");
  96         printf("Value: "); ao_lisp_poly_write(ao_lisp_v); printf("\n");
  97         printf("Stack:\n");
  98         ao_lisp_stack_write(ao_lisp_stack_poly(ao_lisp_stack));
  99         printf("Globals:\n\t");
 100         ao_lisp_frame_write(ao_lisp_frame_poly(ao_lisp_frame_global));
 101         printf("\n");
 102         return AO_LISP_NIL;
 103 }