/*

 * Copyright 2008-2009 Katholieke Universiteit Leuven

 * 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_die0
(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_die0
(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; 
--i0
)

    
isl_int_set0
(vec->el[i + extra], vec->el[i]);

  j = n - 1;

  for (i = expanded - 1; i >= 0; 
--i29.9k
) {

    if (j >= 0 && 
exp[j] == i1.68k
) {

      if (i != j)

        
isl_int_swap302
(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;

}

struct isl_vec *isl_vec_copy(struct isl_vec *vec)

{

  if (!vec)

    return NULL;

  vec->ref++;

  return vec;

}

struct isl_vec *isl_vec_dup(struct 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;

}

struct isl_vec *isl_vec_cow(struct 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;

}

int isl_vec_size(__isl_keep isl_vec *vec)

{

  return vec ? vec->size : 
-10
;

}

/* 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_die0
(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_die0
(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_die0
(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_die0
(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_die0
(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_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_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(struct 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(struct 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;

}

struct isl_vec *isl_vec_normalize(struct 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_die0
(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_die0
(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;

}