isl_vec.c

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/*
 * Copyright 2008-2009 Katholieke Universiteit Leuven
 * Copyright 2011      Sven Verdoolaege
 * Copyright 2013      Ecole Normale Superieure
 *
 * Use of this software is governed by the MIT license
 *
 * Written by Sven Verdoolaege, K.U.Leuven, Departement
 * Computerwetenschappen, Celestijnenlaan 200A, B-3001 Leuven, Belgium
 * and Ecole Normale Superieure, 45 rue d’Ulm, 75230 Paris, France
 */
 
#include <isl_ctx_private.h>
#include <isl_seq.h>
#include <isl_val_private.h>
#include <isl_vec_private.h>
 
isl_ctx *isl_vec_get_ctx(__isl_keep isl_vec *vec)
{
  return vec ? vec->ctx : NULL;
}
 
/* Return a hash value that digests "vec".
 */
uint32_t isl_vec_get_hash(__isl_keep isl_vec *vec)
{
  if (!vec)
    return 0;
 
  return isl_seq_get_hash(vec->el, vec->size);
}
 
__isl_give isl_vec *isl_vec_alloc(struct isl_ctx *ctx, unsigned size)
{
  struct isl_vec *vec;
 
  vec = isl_alloc_type(ctx, struct isl_vec);
  if (!vec)
    return NULL;
 
  vec->block = isl_blk_alloc(ctx, size);
  if (isl_blk_is_error(vec->block))
    goto error;
 
  vec->ctx = ctx;
  isl_ctx_ref(ctx);
  vec->ref = 1;
  vec->size = size;
  vec->el = vec->block.data;
 
  return vec;
error:
  isl_blk_free(ctx, vec->block);
  free(vec);
  return NULL;
}
 
__isl_give isl_vec *isl_vec_extend(__isl_take isl_vec *vec, unsigned size)
{
  if (!vec)
    return NULL;
  if (size <= vec->size)
    return vec;
 
  vec = isl_vec_cow(vec);
  if (!vec)
    return NULL;
 
  vec->block = isl_blk_extend(vec->ctx, vec->block, size);
  if (!vec->block.data)
    goto error;
 
  vec->size = size;
  vec->el = vec->block.data;
 
  return vec;
error:
  isl_vec_free(vec);
  return NULL;
}
 
/* Apply the expansion specified by "exp" to the "n" elements starting at "pos".
 * "expanded" it the number of elements that need to replace those "n"
 * elements.  The entries in "exp" have increasing values between
 * 0 and "expanded".
 */
__isl_give isl_vec *isl_vec_expand(__isl_take isl_vec *vec, int pos, int n,
  int *exp, int expanded)
{
  int i, j;
  int old_size, extra;
 
  if (!vec)
    return NULL;
  if (expanded < n)
    isl_die(isl_vec_get_ctx(vec), isl_error_invalid,
      "not an expansion", return isl_vec_free(vec));
  if (expanded == n)
    return vec;
  if (pos < 0 || n < 0 || pos + n > vec->size)
    isl_die(isl_vec_get_ctx(vec), isl_error_invalid,
      "position out of bounds", return isl_vec_free(vec));
 
  old_size = vec->size;
  extra = expanded - n;
  vec = isl_vec_extend(vec, old_size + extra);
  vec = isl_vec_cow(vec);
  if (!vec)
    return NULL;
 
  for (i = old_size - 1; i >= pos + n; --i)
    isl_int_set(vec->el[i + extra], vec->el[i]);
 
  j = n - 1;
  for (i = expanded - 1; i >= 0; --i) {
    if (j >= 0 && exp[j] == i) {
      if (i != j)
        isl_int_swap(vec->el[pos + i],
               vec->el[pos + j]);
      j--;
    } else {
      isl_int_set_si(vec->el[pos + i], 0);
    }
  }
 
  return vec;
}
 
/* Create a vector of size "size" with zero-valued elements.
 */
__isl_give isl_vec *isl_vec_zero(isl_ctx *ctx, unsigned size)
{
  isl_vec *vec;
 
  vec = isl_vec_alloc(ctx, size);
  if (!vec)
    return NULL;
  isl_seq_clr(vec->el, size);
  return vec;
}
 
__isl_give isl_vec *isl_vec_zero_extend(__isl_take isl_vec *vec, unsigned size)
{
  int extra;
 
  if (!vec)
    return NULL;
  if (size <= vec->size)
    return vec;
 
  vec = isl_vec_cow(vec);
  if (!vec)
    return NULL;
 
  extra = size - vec->size;
  vec = isl_vec_extend(vec, size);
  if (!vec)
    return NULL;
 
  isl_seq_clr(vec->el + size - extra, extra);
 
  return vec;
}
 
/* Return a vector containing the elements of "vec1" followed by
 * those of "vec2".
 */
__isl_give isl_vec *isl_vec_concat(__isl_take isl_vec *vec1,
  __isl_take isl_vec *vec2)
{
  if (!vec1 || !vec2)
    goto error;
 
  if (vec2->size == 0) {
    isl_vec_free(vec2);
    return vec1;
  }
 
  if (vec1->size == 0) {
    isl_vec_free(vec1);
    return vec2;
  }
 
  vec1 = isl_vec_extend(vec1, vec1->size + vec2->size);
  if (!vec1)
    goto error;
 
  isl_seq_cpy(vec1->el + vec1->size - vec2->size, vec2->el, vec2->size);
 
  isl_vec_free(vec2);
  return vec1;
error:
  isl_vec_free(vec1);
  isl_vec_free(vec2);
  return NULL;
}
 
__isl_give isl_vec *isl_vec_copy(__isl_keep isl_vec *vec)
{
  if (!vec)
    return NULL;
 
  vec->ref++;
  return vec;
}
 
__isl_give isl_vec *isl_vec_dup(__isl_keep isl_vec *vec)
{
  struct isl_vec *vec2;
 
  if (!vec)
    return NULL;
  vec2 = isl_vec_alloc(vec->ctx, vec->size);
  if (!vec2)
    return NULL;
  isl_seq_cpy(vec2->el, vec->el, vec->size);
  return vec2;
}
 
__isl_give isl_vec *isl_vec_cow(__isl_take isl_vec *vec)
{
  struct isl_vec *vec2;
  if (!vec)
    return NULL;
 
  if (vec->ref == 1)
    return vec;
 
  vec2 = isl_vec_dup(vec);
  isl_vec_free(vec);
  return vec2;
}
 
__isl_null isl_vec *isl_vec_free(__isl_take isl_vec *vec)
{
  if (!vec)
    return NULL;
 
  if (--vec->ref > 0)
    return NULL;
 
  isl_ctx_deref(vec->ctx);
  isl_blk_free(vec->ctx, vec->block);
  free(vec);
 
  return NULL;
}
 
isl_size isl_vec_size(__isl_keep isl_vec *vec)
{
  return vec ? vec->size : isl_size_error;
}
 
/* Extract the element at position "pos" of "vec".
 */
__isl_give isl_val *isl_vec_get_element_val(__isl_keep isl_vec *vec, int pos)
{
  isl_ctx *ctx;
 
  if (!vec)
    return NULL;
  ctx = isl_vec_get_ctx(vec);
  if (pos < 0 || pos >= vec->size)
    isl_die(ctx, isl_error_invalid, "position out of range",
      return NULL);
  return isl_val_int_from_isl_int(ctx, vec->el[pos]);
}
 
__isl_give isl_vec *isl_vec_set_element(__isl_take isl_vec *vec,
  int pos, isl_int v)
{
  vec = isl_vec_cow(vec);
  if (!vec)
    return NULL;
  if (pos < 0 || pos >= vec->size)
    isl_die(vec->ctx, isl_error_invalid, "position out of range",
      goto error);
  isl_int_set(vec->el[pos], v);
  return vec;
error:
  isl_vec_free(vec);
  return NULL;
}
 
__isl_give isl_vec *isl_vec_set_element_si(__isl_take isl_vec *vec,
  int pos, int v)
{
  vec = isl_vec_cow(vec);
  if (!vec)
    return NULL;
  if (pos < 0 || pos >= vec->size)
    isl_die(vec->ctx, isl_error_invalid, "position out of range",
      goto error);
  isl_int_set_si(vec->el[pos], v);
  return vec;
error:
  isl_vec_free(vec);
  return NULL;
}
 
/* Replace the element at position "pos" of "vec" by "v".
 */
__isl_give isl_vec *isl_vec_set_element_val(__isl_take isl_vec *vec,
  int pos, __isl_take isl_val *v)
{
  if (!v)
    return isl_vec_free(vec);
  if (!isl_val_is_int(v))
    isl_die(isl_val_get_ctx(v), isl_error_invalid,
      "expecting integer value", goto error);
  vec = isl_vec_set_element(vec, pos, v->n);
  isl_val_free(v);
  return vec;
error:
  isl_val_free(v);
  return isl_vec_free(vec);
}
 
/* Compare the elements of "vec1" and "vec2" at position "pos".
 */
int isl_vec_cmp_element(__isl_keep isl_vec *vec1, __isl_keep isl_vec *vec2,
  int pos)
{
  if (!vec1 || !vec2)
    return 0;
  if (pos < 0 || pos >= vec1->size || pos >= vec2->size)
    isl_die(isl_vec_get_ctx(vec1), isl_error_invalid,
      "position out of range", return 0);
  return isl_int_cmp(vec1->el[pos], vec2->el[pos]);
}
 
/* Does "vec" contain only zero elements?
 */
isl_bool isl_vec_is_zero(__isl_keep isl_vec *vec)
{
  if (!vec)
    return isl_bool_error;
  return isl_bool_ok(isl_seq_first_non_zero(vec->el, vec->size) < 0);
}
 
isl_bool isl_vec_is_equal(__isl_keep isl_vec *vec1, __isl_keep isl_vec *vec2)
{
  if (!vec1 || !vec2)
    return isl_bool_error;
 
  if (vec1->size != vec2->size)
    return isl_bool_false;
 
  return isl_bool_ok(isl_seq_eq(vec1->el, vec2->el, vec1->size));
}
 
__isl_give isl_printer *isl_printer_print_vec(__isl_take isl_printer *printer,
  __isl_keep isl_vec *vec)
{
  int i;
 
  if (!printer || !vec)
    goto error;
 
  printer = isl_printer_print_str(printer, "[");
  for (i = 0; i < vec->size; ++i) {
    if (i)
      printer = isl_printer_print_str(printer, ",");
    printer = isl_printer_print_isl_int(printer, vec->el[i]);
  }
  printer = isl_printer_print_str(printer, "]");
 
  return printer;
error:
  isl_printer_free(printer);
  return NULL;
}
 
void isl_vec_dump(__isl_keep isl_vec *vec)
{
  isl_printer *printer;
 
  if (!vec)
    return;
 
  printer = isl_printer_to_file(vec->ctx, stderr);
  printer = isl_printer_print_vec(printer, vec);
  printer = isl_printer_end_line(printer);
 
  isl_printer_free(printer);
}
 
__isl_give isl_vec *isl_vec_set(__isl_take isl_vec *vec, isl_int v)
{
  vec = isl_vec_cow(vec);
  if (!vec)
    return NULL;
  isl_seq_set(vec->el, v, vec->size);
  return vec;
}
 
__isl_give isl_vec *isl_vec_set_si(__isl_take isl_vec *vec, int v)
{
  vec = isl_vec_cow(vec);
  if (!vec)
    return NULL;
  isl_seq_set_si(vec->el, v, vec->size);
  return vec;
}
 
/* Replace all elements of "vec" by "v".
 */
__isl_give isl_vec *isl_vec_set_val(__isl_take isl_vec *vec,
  __isl_take isl_val *v)
{
  vec = isl_vec_cow(vec);
  if (!vec || !v)
    goto error;
  if (!isl_val_is_int(v))
    isl_die(isl_val_get_ctx(v), isl_error_invalid,
      "expecting integer value", goto error);
  isl_seq_set(vec->el, v->n, vec->size);
  isl_val_free(v);
  return vec;
error:
  isl_vec_free(vec);
  isl_val_free(v);
  return NULL;
}
 
__isl_give isl_vec *isl_vec_clr(__isl_take isl_vec *vec)
{
  vec = isl_vec_cow(vec);
  if (!vec)
    return NULL;
  isl_seq_clr(vec->el, vec->size);
  return vec;
}
 
void isl_vec_lcm(__isl_keep isl_vec *vec, isl_int *lcm)
{
  isl_seq_lcm(vec->block.data, vec->size, lcm);
}
 
/* Given a rational vector, with the denominator in the first element
 * of the vector, round up all coordinates.
 */
__isl_give isl_vec *isl_vec_ceil(__isl_take isl_vec *vec)
{
  vec = isl_vec_cow(vec);
  if (!vec)
    return NULL;
 
  isl_seq_cdiv_q(vec->el + 1, vec->el + 1, vec->el[0], vec->size - 1);
 
  isl_int_set_si(vec->el[0], 1);
 
  return vec;
}
 
__isl_give isl_vec *isl_vec_normalize(__isl_take isl_vec *vec)
{
  if (!vec)
    return NULL;
  isl_seq_normalize(vec->ctx, vec->el, vec->size);
  return vec;
}
 
__isl_give isl_vec *isl_vec_neg(__isl_take isl_vec *vec)
{
  vec = isl_vec_cow(vec);
  if (!vec)
    return NULL;
  isl_seq_neg(vec->el, vec->el, vec->size);
  return vec;
}
 
__isl_give isl_vec *isl_vec_scale(__isl_take isl_vec *vec, isl_int m)
{
  if (isl_int_is_one(m))
    return vec;
  vec = isl_vec_cow(vec);
  if (!vec)
    return NULL;
  isl_seq_scale(vec->el, vec->el, m, vec->size);
  return vec;
}
 
/* Reduce the elements of "vec" modulo "m".
 */
__isl_give isl_vec *isl_vec_fdiv_r(__isl_take isl_vec *vec, isl_int m)
{
  vec = isl_vec_cow(vec);
  if (!vec)
    return NULL;
 
  isl_seq_fdiv_r(vec->el, vec->el, m, vec->size);
 
  return vec;
}
 
__isl_give isl_vec *isl_vec_add(__isl_take isl_vec *vec1,
  __isl_take isl_vec *vec2)
{
  vec1 = isl_vec_cow(vec1);
  if (!vec1 || !vec2)
    goto error;
 
  isl_assert(vec1->ctx, vec1->size == vec2->size, goto error);
 
  isl_seq_combine(vec1->el, vec1->ctx->one, vec1->el,
      vec1->ctx->one, vec2->el, vec1->size);
  
  isl_vec_free(vec2);
  return vec1;
error:
  isl_vec_free(vec1);
  isl_vec_free(vec2);
  return NULL;
}
 
static int qsort_int_cmp(const void *p1, const void *p2)
{
  const isl_int *i1 = (const isl_int *) p1;
  const isl_int *i2 = (const isl_int *) p2;
 
  return isl_int_cmp(*i1, *i2);
}
 
__isl_give isl_vec *isl_vec_sort(__isl_take isl_vec *vec)
{
  if (!vec)
    return NULL;
  
  qsort(vec->el, vec->size, sizeof(*vec->el), &qsort_int_cmp);
 
  return vec;
}
 
__isl_give isl_vec *isl_vec_drop_els(__isl_take isl_vec *vec,
  unsigned pos, unsigned n)
{
  if (n == 0)
    return vec;
  vec = isl_vec_cow(vec);
  if (!vec)
    return NULL;
 
  if (pos + n > vec->size)
    isl_die(vec->ctx, isl_error_invalid,
      "range out of bounds", goto error);
 
  if (pos + n != vec->size)
    isl_seq_cpy(vec->el + pos, vec->el + pos + n,
          vec->size - pos - n);
 
  vec->size -= n;
  
  return vec;
error:
  isl_vec_free(vec);
  return NULL;
}
 
__isl_give isl_vec *isl_vec_insert_els(__isl_take isl_vec *vec,
  unsigned pos, unsigned n)
{
  isl_vec *ext = NULL;
 
  if (n == 0)
    return vec;
  if (!vec)
    return NULL;
 
  if (pos > vec->size)
    isl_die(vec->ctx, isl_error_invalid,
      "position out of bounds", goto error);
 
  ext =  isl_vec_alloc(vec->ctx, vec->size + n);
  if (!ext)
    goto error;
 
  isl_seq_cpy(ext->el, vec->el, pos);
  isl_seq_cpy(ext->el + pos + n, vec->el + pos, vec->size - pos);
 
  isl_vec_free(vec);
  return ext;
error:
  isl_vec_free(vec);
  isl_vec_free(ext);
  return NULL;
}
 
/* Add "n" elements at the end of "vec".
 */
__isl_give isl_vec *isl_vec_add_els(__isl_take isl_vec *vec, unsigned n)
{
  if (!vec)
    return NULL;
  return isl_vec_insert_els(vec, vec->size, n);
}
 
__isl_give isl_vec *isl_vec_insert_zero_els(__isl_take isl_vec *vec,
  unsigned pos, unsigned n)
{
  vec = isl_vec_insert_els(vec, pos, n);
  if (!vec)
    return NULL;
 
  isl_seq_clr(vec->el + pos, n);
 
  return vec;
}
 
/* Move the "n" elements starting as "src_pos" of "vec"
 * to "dst_pos".  The elements originally at "dst_pos" are moved
 * up or down depending on whether "dst_pos" is smaller or greater
 * than "src_pos".
 */
__isl_give isl_vec *isl_vec_move_els(__isl_take isl_vec *vec,
  unsigned dst_pos, unsigned src_pos, unsigned n)
{
  isl_vec *res;
 
  if (!vec)
    return NULL;
 
  if (src_pos + n > vec->size)
    isl_die(vec->ctx, isl_error_invalid,
      "source range out of bounds", return isl_vec_free(vec));
  if (dst_pos + n > vec->size)
    isl_die(vec->ctx, isl_error_invalid,
      "destination range out of bounds",
      return isl_vec_free(vec));
 
  if (n == 0 || dst_pos == src_pos)
    return vec;
 
  res = isl_vec_alloc(vec->ctx, vec->size);
  if (!res)
    return isl_vec_free(vec);
 
  if (dst_pos < src_pos) {
    isl_seq_cpy(res->el, vec->el, dst_pos);
    isl_seq_cpy(res->el + dst_pos, vec->el + src_pos, n);
    isl_seq_cpy(res->el + dst_pos + n,
          vec->el + dst_pos, src_pos - dst_pos);
    isl_seq_cpy(res->el + src_pos + n,
          vec->el + src_pos + n, res->size - src_pos - n);
  } else {
    isl_seq_cpy(res->el, vec->el, src_pos);
    isl_seq_cpy(res->el + src_pos,
          vec->el + src_pos + n, dst_pos - src_pos);
    isl_seq_cpy(res->el + dst_pos, vec->el + src_pos, n);
    isl_seq_cpy(res->el + dst_pos + n,
          vec->el + dst_pos + n, res->size - dst_pos - n);
  }
 
  isl_vec_free(vec);
  return res;
}
 
/* Reorder the elements of "vec" starting at "offset" based
 * on the given reordering.
 */
__isl_give isl_vec *isl_vec_reorder(__isl_take isl_vec *vec,
  unsigned offset, __isl_take isl_reordering *r)
{
  isl_vec *res;
  int i;
 
  if (!vec || !r)
    goto error;
 
  res = isl_vec_alloc(vec->ctx, offset + r->dst_len);
  if (!res)
    goto error;
  isl_seq_cpy(res->el, vec->el, offset);
  isl_seq_clr(res->el + offset, res->size - offset);
  for (i = 0; i < r->src_len; ++i)
    isl_int_set(res->el[offset + r->pos[i]], vec->el[offset + i]);
 
  isl_reordering_free(r);
  isl_vec_free(vec);
  return res;
error:
  isl_vec_free(vec);
  isl_reordering_free(r);
  return NULL;
}