libguile/vectors.c

   1 /*      Copyright (C) 1995, 1996, 1998, 1999 Free Software Foundation, Inc.
   2  *
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation; either version 2, or (at your option)
   6  * any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this software; see the file COPYING.  If not, write to
  15  * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  16  * Boston, MA 02111-1307 USA
  17  *
  18  * As a special exception, the Free Software Foundation gives permission
  19  * for additional uses of the text contained in its release of GUILE.
  20  *
  21  * The exception is that, if you link the GUILE library with other files
  22  * to produce an executable, this does not by itself cause the
  23  * resulting executable to be covered by the GNU General Public License.
  24  * Your use of that executable is in no way restricted on account of
  25  * linking the GUILE library code into it.
  26  *
  27  * This exception does not however invalidate any other reasons why
  28  * the executable file might be covered by the GNU General Public License.
  29  *
  30  * This exception applies only to the code released by the
  31  * Free Software Foundation under the name GUILE.  If you copy
  32  * code from other Free Software Foundation releases into a copy of
  33  * GUILE, as the General Public License permits, the exception does
  34  * not apply to the code that you add in this way.  To avoid misleading
  35  * anyone as to the status of such modified files, you must delete
  36  * this exception notice from them.
  37  *
  38  * If you write modifications of your own for GUILE, it is your choice
  39  * whether to permit this exception to apply to your modifications.
  40  * If you do not wish that, delete this exception notice.  */
  41
  42 /* Software engineering face-lift by Greg J. Badros, 11-Dec-1999,
  43    gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */
  44
  45 \f
  46
  47 #include <stdio.h>
  48 #include "_scm.h"
  49 #include "eq.h"
  50
  51 #include "scm_validate.h"
  52 #include "vectors.h"
  53 #include "unif.h"
  54 \f
  55
  56 /*
  57  * This complicates things too much if allowed on any array.
  58  * C code can safely call it on arrays known to be used in a single
  59  * threaded manner.
  60  *
  61  * SCM_REGISTER_PROC(s_vector_set_length_x, "vector-set-length!", 2, 0, 0, scm_vector_set_length_x);
  62  */
  63 static char s_vector_set_length_x[] = "vector-set-length!";
  64
  65
  66 SCM
  67 scm_vector_set_length_x (SCM vect, SCM len)
  68 {
  69   long l;
  70   scm_sizet siz;
  71   scm_sizet sz;
  72
  73   l = SCM_INUM (len);
  74   SCM_ASRTGO (SCM_NIMP (vect), badarg1);
  75
  76 #ifdef HAVE_ARRAYS
  77   if (SCM_TYP7 (vect) == scm_tc7_bvect)
  78     {
  79       l = (l + SCM_LONG_BIT - 1) / SCM_LONG_BIT;
  80     }
  81   sz = scm_uniform_element_size (vect);
  82   if (sz == 0)
  83 #endif
  84   switch (SCM_TYP7 (vect))
  85     {
  86     default:
  87     badarg1: scm_wta (vect, (char *) SCM_ARG1, s_vector_set_length_x);
  88     case scm_tc7_string:
  89       SCM_ASRTGO (vect != scm_nullstr, badarg1);
  90       sz = sizeof (char);
  91       l++;
  92       break;
  93     case scm_tc7_vector:
  94     case scm_tc7_wvect:
  95       SCM_ASRTGO (vect != scm_nullvect, badarg1);
  96       sz = sizeof (SCM);
  97       break;
  98     }
  99   SCM_ASSERT (SCM_INUMP (len), len, SCM_ARG2, s_vector_set_length_x);
 100   if (!l)
 101     l = 1L;
 102   siz = l * sz;
 103   if (siz != l * sz)
 104     scm_wta (SCM_MAKINUM (l * sz), (char *) SCM_NALLOC, s_vector_set_length_x);
 105   SCM_REDEFER_INTS;
 106   SCM_SETCHARS (vect,
 107             ((char *)
 108              scm_must_realloc (SCM_CHARS (vect),
 109                                (long) SCM_LENGTH (vect) * sz,
 110                                (long) siz,
 111                                s_vector_set_length_x)));
 112   if (SCM_VECTORP (vect))
 113     {
 114       sz = SCM_LENGTH (vect);
 115       while (l > sz)
 116         SCM_VELTS (vect)[--l] = SCM_UNSPECIFIED;
 117     }
 118   else if (SCM_STRINGP (vect))
 119     SCM_CHARS (vect)[l - 1] = 0;
 120   SCM_SETLENGTH (vect, SCM_INUM (len), SCM_TYP7 (vect));
 121   SCM_REALLOW_INTS;
 122   return vect;
 123 }
 124
 125 SCM_DEFINE (scm_vector_p, "vector?", 1, 0, 0,
 126             (SCM x),
 127 "")
 128 #define FUNC_NAME s_scm_vector_p
 129 {
 130   if (SCM_IMP (x))
 131     return SCM_BOOL_F;
 132   return SCM_BOOL (SCM_VECTORP (x));
 133 }
 134 #undef FUNC_NAME
 135
 136 SCM_GPROC (s_vector_length, "vector-length", 1, 0, 0, scm_vector_length, g_vector_length);
 137
 138 SCM
 139 scm_vector_length (SCM v)
 140 {
 141   SCM_GASSERT1 (SCM_VECTORP(v),
 142                 g_vector_length, v, SCM_ARG1, s_vector_length);
 143   return SCM_MAKINUM (SCM_LENGTH (v));
 144 }
 145
 146 SCM_REGISTER_PROC (s_list_to_vector, "list->vector", 1, 0, 0, scm_vector);
 147
 148 SCM_DEFINE (scm_vector, "vector", 0, 0, 1,
 149             (SCM l),
 150 "")
 151 #define FUNC_NAME s_scm_vector
 152 {
 153   SCM res;
 154   register SCM *data;
 155   int i;
 156   SCM_VALIDATE_LIST_COPYLEN (1,l,i);
 157   res = scm_make_vector (SCM_MAKINUM (i), SCM_UNSPECIFIED);
 158   data = SCM_VELTS (res);
 159   for(; i && SCM_NIMP(l); --i, l = SCM_CDR (l))
 160     *data++ = SCM_CAR (l);
 161   return res;
 162 }
 163 #undef FUNC_NAME
 164
 165 SCM_GPROC (s_vector_ref, "vector-ref", 2, 0, 0, scm_vector_ref, g_vector_ref);
 166
 167 SCM
 168 scm_vector_ref (SCM v, SCM k)
 169 {
 170   SCM_GASSERT2 (SCM_VECTORP (v),
 171                 g_vector_ref, v, k, SCM_ARG1, s_vector_ref);
 172   SCM_GASSERT2 (SCM_INUMP (k),
 173                 g_vector_ref, v, k, SCM_ARG2, s_vector_ref);
 174   SCM_ASSERT (SCM_INUM (k) < SCM_LENGTH (v) && SCM_INUM (k) >= 0,
 175               k, SCM_OUTOFRANGE, s_vector_ref);
 176   return SCM_VELTS (v)[(long) SCM_INUM (k)];
 177 }
 178
 179 SCM_GPROC (s_vector_set_x, "vector-set!", 3, 0, 0, scm_vector_set_x, g_vector_set_x);
 180
 181 SCM
 182 scm_vector_set_x (SCM v, SCM k, SCM obj)
 183 {
 184   SCM_GASSERTn (SCM_VECTORP (v),
 185                 g_vector_set_x, SCM_LIST3 (v, k, obj),
 186                 SCM_ARG1, s_vector_set_x);
 187   SCM_GASSERTn (SCM_INUMP (k),
 188                 g_vector_set_x, SCM_LIST3 (v, k, obj),
 189                 SCM_ARG2, s_vector_set_x);
 190   SCM_ASSERT ((SCM_INUM (k) < SCM_LENGTH (v)) && (SCM_INUM (k) >= 0),
 191               k, SCM_OUTOFRANGE, s_vector_set_x);
 192   SCM_VELTS(v)[(long) SCM_INUM(k)] = obj;
 193   return obj;
 194 }
 195
 196
 197 SCM_DEFINE (scm_make_vector, "make-vector", 1, 1, 0,
 198             (SCM k, SCM fill),
 199 "")
 200 #define FUNC_NAME s_scm_make_vector
 201 {
 202   SCM v;
 203   register long i;
 204   register long j;
 205   register SCM *velts;
 206
 207   SCM_VALIDATE_INUM_MIN (1,k,0);
 208   if (SCM_UNBNDP(fill))
 209     fill = SCM_UNSPECIFIED;
 210   i = SCM_INUM(k);
 211   SCM_NEWCELL(v);
 212   SCM_DEFER_INTS;
 213   SCM_SETCHARS(v, scm_must_malloc(i?(long)(i*sizeof(SCM)):1L, FUNC_NAME));
 214   SCM_SETLENGTH(v, i, scm_tc7_vector);
 215   velts = SCM_VELTS(v);
 216   j = 0;
 217   while(--i >= j) (velts)[i] = fill;
 218   SCM_ALLOW_INTS;
 219   return v;
 220 }
 221 #undef FUNC_NAME
 222
 223
 224 SCM_DEFINE (scm_vector_to_list, "vector->list", 1, 0, 0,
 225            (SCM v),
 226 "")
 227 #define FUNC_NAME s_scm_vector_to_list
 228 {
 229   SCM res = SCM_EOL;
 230   long i;
 231   SCM *data;
 232   SCM_VALIDATE_VECTOR (1,v);
 233   data = SCM_VELTS(v);
 234   for(i = SCM_LENGTH(v)-1;i >= 0;i--) res = scm_cons(data[i], res);
 235   return res;
 236 }
 237 #undef FUNC_NAME
 238
 239
 240 SCM_DEFINE (scm_vector_fill_x, "vector-fill!", 2, 0, 0,
 241             (SCM v, SCM fill_x),
 242 "")
 243 #define FUNC_NAME s_scm_vector_fill_x
 244 {
 245   register long i;
 246   register SCM *data;
 247   SCM_VALIDATE_VECTOR (1,v);
 248   data = SCM_VELTS(v);
 249   for(i = SCM_LENGTH(v) - 1; i >= 0; i--)
 250     data[i] = fill_x;
 251   return SCM_UNSPECIFIED;
 252 }
 253 #undef FUNC_NAME
 254
 255
 256
 257 SCM
 258 scm_vector_equal_p(SCM x, SCM y)
 259 {
 260   long i;
 261   for(i = SCM_LENGTH(x)-1;i >= 0;i--)
 262     if (SCM_FALSEP(scm_equal_p(SCM_VELTS(x)[i], SCM_VELTS(y)[i])))
 263       return SCM_BOOL_F;
 264   return SCM_BOOL_T;
 265 }
 266
 267
 268 SCM_DEFINE (scm_vector_move_left_x, "vector-move-left!", 5, 0, 0,
 269             (SCM vec1, SCM start1, SCM end1, SCM vec2, SCM start2),
 270             "Vector version of @code{substring-move-left!}.")
 271 #define FUNC_NAME s_scm_vector_move_left_x
 272 {
 273   long i;
 274   long j;
 275   long e;
 276
 277   SCM_VALIDATE_VECTOR (1,vec1);
 278   SCM_VALIDATE_INUM_COPY (2,start1,i);
 279   SCM_VALIDATE_INUM_COPY (3,end1,e);
 280   SCM_VALIDATE_VECTOR (4,vec2);
 281   SCM_VALIDATE_INUM_COPY (5,start2,j);
 282   SCM_ASSERT (i <= SCM_LENGTH (vec1) && i >= 0, start1, SCM_OUTOFRANGE, FUNC_NAME);
 283   SCM_ASSERT (j <= SCM_LENGTH (vec2) && j >= 0, start2, SCM_OUTOFRANGE, FUNC_NAME);
 284   SCM_ASSERT (e <= SCM_LENGTH (vec1) && e >= 0, end1, SCM_OUTOFRANGE, FUNC_NAME);
 285   SCM_ASSERT (e-i+j <= SCM_LENGTH (vec2), start2, SCM_OUTOFRANGE, FUNC_NAME);
 286   while (i<e) SCM_VELTS (vec2)[j++] = SCM_VELTS (vec1)[i++];
 287   return SCM_UNSPECIFIED;
 288 }
 289 #undef FUNC_NAME
 290
 291 SCM_DEFINE (scm_vector_move_right_x, "vector-move-right!", 5, 0, 0,
 292             (SCM vec1, SCM start1, SCM end1, SCM vec2, SCM start2),
 293             "Vector version of @code{substring-move-right!}.")
 294 #define FUNC_NAME s_scm_vector_move_right_x
 295 {
 296   long i;
 297   long j;
 298   long e;
 299
 300   SCM_VALIDATE_VECTOR (1,vec1);
 301   SCM_VALIDATE_INUM_COPY (2,start1,i);
 302   SCM_VALIDATE_INUM_COPY (3,end1,e);
 303   SCM_VALIDATE_VECTOR (4,vec2);
 304   SCM_VALIDATE_INUM_COPY (5,start2,j);
 305   SCM_ASSERT (i <= SCM_LENGTH (vec1) && i >= 0, start1, SCM_OUTOFRANGE, FUNC_NAME);
 306   SCM_ASSERT (j <= SCM_LENGTH (vec2) && j >= 0, start2, SCM_OUTOFRANGE, FUNC_NAME);
 307   SCM_ASSERT (e <= SCM_LENGTH (vec1) && e >= 0, end1, SCM_OUTOFRANGE, FUNC_NAME);
 308   j = e - i + j;
 309   SCM_ASSERT (j <= SCM_LENGTH (vec2), start2, SCM_OUTOFRANGE, FUNC_NAME);
 310   while (i < e)
 311     SCM_VELTS (vec2)[--j] = SCM_VELTS (vec1)[--e];
 312   return SCM_UNSPECIFIED;
 313 }
 314 #undef FUNC_NAME
 315
 316
 317
 318 void
 319 scm_init_vectors ()
 320 {
 321 #include "vectors.x"
 322   /*
 323     scm_make_subr (s_resizuve, scm_tc7_subr_2, scm_vector_set_length_x); */
 324 }
 325