git.gag.com Git - fw/altos/blob - src/scheme/ao_scheme_vector.c

   1 /*
   2  * Copyright © 2017 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_scheme.h"
  16
  17 #ifdef AO_SCHEME_FEATURE_VECTOR
  18
  19 static void vector_mark(void *addr)
  20 {
  21         struct ao_scheme_vector *vector = addr;
  22         unsigned int    i;
  23
  24         for (i = 0; i < vector->length; i++) {
  25                 ao_poly v = vector->vals[i];
  26
  27                 ao_scheme_poly_mark(v, 1);
  28         }
  29 }
  30
  31 static int vector_len_size(uint16_t length)
  32 {
  33         return sizeof (struct ao_scheme_vector) + length * sizeof (ao_poly);
  34 }
  35
  36 static int vector_size(void *addr)
  37 {
  38         struct ao_scheme_vector *vector = addr;
  39
  40         return vector_len_size(vector->length);
  41 }
  42
  43 static void vector_move(void *addr)
  44 {
  45         struct ao_scheme_vector *vector = addr;
  46         unsigned int    i;
  47
  48         for (i = 0; i < vector->length; i++)
  49                 (void) ao_scheme_poly_move(&vector->vals[i], 1);
  50 }
  51
  52 const struct ao_scheme_type ao_scheme_vector_type = {
  53         .mark = vector_mark,
  54         .size = vector_size,
  55         .move = vector_move,
  56         .name = "vector",
  57 };
  58
  59 struct ao_scheme_vector *
  60 ao_scheme_vector_alloc(uint16_t length, ao_poly fill)
  61 {
  62         struct ao_scheme_vector *vector;
  63         unsigned int i;
  64
  65         vector = ao_scheme_alloc(vector_len_size(length));
  66         if (!vector)
  67                 return NULL;
  68         vector->type = AO_SCHEME_VECTOR;
  69         vector->length = length;
  70         for (i = 0; i < length; i++)
  71                 vector->vals[i] = fill;
  72         return vector;
  73 }
  74
  75 void
  76 ao_scheme_vector_write(ao_poly v)
  77 {
  78         struct ao_scheme_vector *vector = ao_scheme_poly_vector(v);
  79         unsigned int i;
  80
  81         printf("#(");
  82         for (i = 0; i < vector->length; i++) {
  83                 if (i != 0)
  84                         printf(" ");
  85                 if (vector->vals[i] == v)
  86                         printf ("...");
  87                 else
  88                         ao_scheme_poly_write(vector->vals[i]);
  89         }
  90         printf(")");
  91 }
  92
  93 void
  94 ao_scheme_vector_display(ao_poly v)
  95 {
  96         struct ao_scheme_vector *vector = ao_scheme_poly_vector(v);
  97         unsigned int i;
  98
  99         for (i = 0; i < vector->length; i++) {
 100                 if (vector->vals[i] == v)
 101                         printf("...");
 102                 else
 103                         ao_scheme_poly_display(vector->vals[i]);
 104         }
 105 }
 106
 107 static int32_t
 108 ao_scheme_vector_offset(struct ao_scheme_vector *vector, ao_poly i)
 109 {
 110         int32_t offset = ao_scheme_poly_integer(i);
 111
 112         if (offset == AO_SCHEME_NOT_INTEGER)
 113                 ao_scheme_error(AO_SCHEME_INVALID, "vector index %v not integer", i);
 114         if (offset < 0 || vector->length <= offset) {
 115                 ao_scheme_error(AO_SCHEME_INVALID, "vector index %v out of range (max %d)",
 116                                 i, vector->length);
 117                 offset = AO_SCHEME_NOT_INTEGER;
 118         }
 119         return offset;
 120 }
 121
 122 ao_poly
 123 ao_scheme_vector_get(ao_poly v, ao_poly i)
 124 {
 125         struct ao_scheme_vector *vector = ao_scheme_poly_vector(v);
 126         int32_t                 offset = ao_scheme_vector_offset(vector, i);
 127
 128         if (offset == AO_SCHEME_NOT_INTEGER)
 129                 return AO_SCHEME_NIL;
 130         return vector->vals[offset];
 131 }
 132
 133 ao_poly
 134 ao_scheme_vector_set(ao_poly v, ao_poly i, ao_poly p)
 135 {
 136         struct ao_scheme_vector *vector = ao_scheme_poly_vector(v);
 137         int32_t                 offset = ao_scheme_vector_offset(vector, i);
 138
 139         if (offset == AO_SCHEME_NOT_INTEGER)
 140                 return AO_SCHEME_NIL;
 141         return vector->vals[offset] = p;
 142 }
 143
 144 struct ao_scheme_vector *
 145 ao_scheme_list_to_vector(struct ao_scheme_cons *cons)
 146 {
 147         uint16_t                length;
 148         uint16_t                i;
 149         struct ao_scheme_vector *vector;
 150
 151         length = (uint16_t) ao_scheme_cons_length (cons);
 152         if (ao_scheme_exception)
 153                 return NULL;
 154
 155         ao_scheme_cons_stash(0, cons);
 156         vector = ao_scheme_vector_alloc(length, AO_SCHEME_NIL);
 157         cons = ao_scheme_cons_fetch(0);
 158         if (!vector)
 159                 return NULL;
 160         i = 0;
 161         while (cons) {
 162                 vector->vals[i++] = cons->car;
 163                 cons = ao_scheme_cons_cdr(cons);
 164         }
 165         return vector;
 166 }
 167
 168 struct ao_scheme_cons *
 169 ao_scheme_vector_to_list(struct ao_scheme_vector *vector)
 170 {
 171         unsigned int            i;
 172         uint16_t                length = vector->length;
 173         struct ao_scheme_cons   *cons = NULL;
 174
 175         for (i = length; i-- > 0;) {
 176                 ao_scheme_poly_stash(2, ao_scheme_vector_poly(vector));
 177                 cons = ao_scheme_cons_cons(vector->vals[i], ao_scheme_cons_poly(cons));
 178                 vector = ao_scheme_poly_vector(ao_scheme_poly_fetch(2));
 179                 if (!cons)
 180                         return NULL;
 181         }
 182         return cons;
 183 }
 184
 185 #endif /* AO_SCHEME_FEATURE_VECTOR */