isl_output.c

Go to the documentation of this file.

/*
 * Copyright 2008-2009 Katholieke Universiteit Leuven
 * Copyright 2010      INRIA Saclay
 * Copyright 2012-2013 Ecole Normale Superieure
 * Copyright 2019      Cerebras Systems
 *
 * 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 INRIA Saclay - Ile-de-France, Parc Club Orsay Universite,
 * ZAC des vignes, 4 rue Jacques Monod, 91893 Orsay, France 
 * and Ecole Normale Superieure, 45 rue d'Ulm, 75230 Paris, France
 * and Cerebras Systems, 175 S San Antonio Rd, Los Altos, CA, USA
 */
 
#include <stdlib.h>
#include <string.h>
#include <isl_ctx_private.h>
#include <isl_map_private.h>
#include <isl/set.h>
#include <isl_seq.h>
#include <isl_polynomial_private.h>
#include <isl_printer_private.h>
#include <isl_space_private.h>
#include <isl_mat_private.h>
#include <isl_vec_private.h>
#include <isl/union_set.h>
#include <isl/union_map.h>
#include <isl/constraint.h>
#include <isl_local.h>
#include <isl_local_space_private.h>
#include <isl_aff_private.h>
#include <isl_id_private.h>
#include <isl_val_private.h>
#include <isl_constraint_private.h>
#include <isl/ast_build.h>
#include <isl_sort.h>
#include <isl_output_private.h>
 
#include <bset_to_bmap.c>
#include <set_to_map.c>
#include <uset_to_umap.c>
 
static const char *s_to[2] = { " -> ", " \\to " };
static const char *s_and[2] = { " and ", " \\wedge " };
static const char *s_or[2] = { " or ", " \\vee " };
static const char *s_le[2] = { "<=", "\\le" };
static const char *s_ge[2] = { ">=", "\\ge" };
static const char *s_open_set[2] = { "{ ", "\\{\\, " };
static const char *s_close_set[2] = { " }", " \\,\\}" };
static const char *s_open_list[2] = { "[", "(" };
static const char *s_close_list[2] = { "]", ")" };
static const char *s_such_that[2] = { " : ", " \\mid " };
static const char *s_open_exists[2] = { "exists (", "\\exists \\, " };
static const char *s_close_exists[2] = { ")", "" };
static const char *s_div_prefix[2] = { "e", "\\alpha_" };
static const char *s_mod[2] = { "mod", "\\bmod" };
static const char *s_param_prefix[2] = { "p", "p_" };
static const char *s_input_prefix[2] = { "i", "i_" };
static const char *s_output_prefix[2] = { "o", "o_" };
 
static __isl_give isl_printer *print_constraint_polylib(
  struct isl_basic_map *bmap, int ineq, int n, __isl_take isl_printer *p)
{
  int i;
  isl_size n_in = isl_basic_map_dim(bmap, isl_dim_in);
  isl_size n_out = isl_basic_map_dim(bmap, isl_dim_out);
  isl_size nparam = isl_basic_map_dim(bmap, isl_dim_param);
  isl_int *c = ineq ? bmap->ineq[n] : bmap->eq[n];
 
  if (n_in < 0 || n_out < 0 || nparam < 0)
    return isl_printer_free(p);
 
  p = isl_printer_start_line(p);
  p = isl_printer_print_int(p, ineq);
  for (i = 0; i < n_out; ++i) {
    p = isl_printer_print_str(p, " ");
    p = isl_printer_print_isl_int(p, c[1+nparam+n_in+i]);
  }
  for (i = 0; i < n_in; ++i) {
    p = isl_printer_print_str(p, " ");
    p = isl_printer_print_isl_int(p, c[1+nparam+i]);
  }
  for (i = 0; i < bmap->n_div; ++i) {
    p = isl_printer_print_str(p, " ");
    p = isl_printer_print_isl_int(p, c[1+nparam+n_in+n_out+i]);
  }
  for (i = 0; i < nparam; ++i) {
    p = isl_printer_print_str(p, " ");
    p = isl_printer_print_isl_int(p, c[1+i]);
  }
  p = isl_printer_print_str(p, " ");
  p = isl_printer_print_isl_int(p, c[0]);
  p = isl_printer_end_line(p);
  return p;
}
 
static __isl_give isl_printer *print_constraints_polylib(
  struct isl_basic_map *bmap, __isl_take isl_printer *p)
{
  int i;
 
  p = isl_printer_set_isl_int_width(p, 5);
 
  for (i = 0; i < bmap->n_eq; ++i)
    p = print_constraint_polylib(bmap, 0, i, p);
  for (i = 0; i < bmap->n_ineq; ++i)
    p = print_constraint_polylib(bmap, 1, i, p);
 
  return p;
}
 
static __isl_give isl_printer *bset_print_constraints_polylib(
  struct isl_basic_set *bset, __isl_take isl_printer *p)
{
  return print_constraints_polylib(bset_to_bmap(bset), p);
}
 
static __isl_give isl_printer *isl_basic_map_print_polylib(
  __isl_keep isl_basic_map *bmap, __isl_take isl_printer *p, int ext)
{
  isl_size total;
 
  total = isl_basic_map_dim(bmap, isl_dim_all);
  if (total < 0)
    return isl_printer_free(p);
  p = isl_printer_start_line(p);
  p = isl_printer_print_int(p, bmap->n_eq + bmap->n_ineq);
  p = isl_printer_print_str(p, " ");
  p = isl_printer_print_int(p, 1 + total + 1);
  if (ext) {
    isl_size n_in = isl_basic_map_dim(bmap, isl_dim_in);
    isl_size n_out = isl_basic_map_dim(bmap, isl_dim_out);
    isl_size n_div = isl_basic_map_dim(bmap, isl_dim_div);
    isl_size nparam = isl_basic_map_dim(bmap, isl_dim_param);
 
    if (n_in < 0 || n_out < 0 || n_div < 0 || nparam < 0)
      return isl_printer_free(p);
 
    p = isl_printer_print_str(p, " ");
    p = isl_printer_print_int(p, n_out);
    p = isl_printer_print_str(p, " ");
    p = isl_printer_print_int(p, n_in);
    p = isl_printer_print_str(p, " ");
    p = isl_printer_print_int(p, n_div);
    p = isl_printer_print_str(p, " ");
    p = isl_printer_print_int(p, nparam);
  }
  p = isl_printer_end_line(p);
  return print_constraints_polylib(bmap, p);
}
 
static __isl_give isl_printer *isl_basic_set_print_polylib(
  __isl_keep isl_basic_set *bset, __isl_take isl_printer *p, int ext)
{
  return isl_basic_map_print_polylib(bset_to_bmap(bset), p, ext);
}
 
static __isl_give isl_printer *isl_map_print_polylib(__isl_keep isl_map *map,
  __isl_take isl_printer *p, int ext)
{
  int i;
 
  p = isl_printer_start_line(p);
  p = isl_printer_print_int(p, map->n);
  p = isl_printer_end_line(p);
  for (i = 0; i < map->n; ++i) {
    p = isl_printer_start_line(p);
    p = isl_printer_end_line(p);
    p = isl_basic_map_print_polylib(map->p[i], p, ext);
  }
  return p;
}
 
static __isl_give isl_printer *isl_set_print_polylib(__isl_keep isl_set *set,
  __isl_take isl_printer *p, int ext)
{
  return isl_map_print_polylib(set_to_map(set), p, ext);
}
 
static isl_size count_same_name(__isl_keep isl_space *space,
  enum isl_dim_type type, unsigned pos, const char *name)
{
  enum isl_dim_type t;
  int p;
  isl_size s;
  int count = 0;
 
  for (t = isl_dim_param; t <= type && t <= isl_dim_out; ++t) {
    s = t == type ? pos : isl_space_dim(space, t);
    if (s < 0)
      return isl_size_error;
    for (p = 0; p < s; ++p) {
      const char *n = isl_space_get_dim_name(space, t, p);
      if (n && !strcmp(n, name))
        count++;
    }
  }
  return count;
}
 
/* Print the name of the variable of type "type" and position "pos"
 * in "space" to "p".
 */
static __isl_give isl_printer *print_name(__isl_keep isl_space *space,
  __isl_take isl_printer *p, enum isl_dim_type type, unsigned pos,
  int latex)
{
  const char *name;
  char buffer[20];
  isl_size primes;
 
  name = type == isl_dim_div ? NULL
           : isl_space_get_dim_name(space, type, pos);
 
  if (!name) {
    const char *prefix;
    if (type == isl_dim_param)
      prefix = s_param_prefix[latex];
    else if (type == isl_dim_div)
      prefix = s_div_prefix[latex];
    else if (isl_space_is_set(space) || type == isl_dim_in)
      prefix = s_input_prefix[latex];
    else
      prefix = s_output_prefix[latex];
    snprintf(buffer, sizeof(buffer), "%s%d", prefix, pos);
    name = buffer;
  }
  primes = count_same_name(space, name == buffer ? isl_dim_div : type,
         pos, name);
  if (primes < 0)
    return isl_printer_free(p);
  p = isl_printer_print_str(p, name);
  while (primes-- > 0)
    p = isl_printer_print_str(p, "'");
  return p;
}
 
static isl_stat pos2type(__isl_keep isl_space *space,
  enum isl_dim_type *type, unsigned *pos)
{
  isl_size n_in = isl_space_dim(space, isl_dim_in);
  isl_size n_out = isl_space_dim(space, isl_dim_out);
  isl_size nparam = isl_space_dim(space, isl_dim_param);
 
  if (n_in < 0 || n_out < 0 || nparam < 0)
    return isl_stat_error;
 
  if (*pos < 1 + nparam) {
    *type = isl_dim_param;
    *pos -= 1;
  } else if (*pos < 1 + nparam + n_in) {
    *type = isl_dim_in;
    *pos -= 1 + nparam;
  } else if (*pos < 1 + nparam + n_in + n_out) {
    *type = isl_dim_out;
    *pos -= 1 + nparam + n_in;
  } else {
    *type = isl_dim_div;
    *pos -= 1 + nparam + n_in + n_out;
  }
 
  return isl_stat_ok;
}
 
/* Can the div expression of the integer division at position "row" of "div"
 * be printed?
 * In particular, are the div expressions available and does the selected
 * variable have a known explicit representation?
 * Furthermore, the Omega format does not allow any div expressions
 * to be printed.
 */
static isl_bool can_print_div_expr(__isl_keep isl_printer *p,
  __isl_keep isl_mat *div, int pos)
{
  if (p->output_format == ISL_FORMAT_OMEGA)
    return isl_bool_false;
  if (!div)
    return isl_bool_false;
  return isl_bool_not(isl_local_div_is_marked_unknown(div, pos));
}
 
static __isl_give isl_printer *print_div(__isl_keep isl_space *space,
  __isl_keep isl_mat *div, int pos, __isl_take isl_printer *p);
 
static __isl_give isl_printer *print_term(__isl_keep isl_space *space,
  __isl_keep isl_mat *div,
  isl_int c, unsigned pos, __isl_take isl_printer *p, int latex)
{
  enum isl_dim_type type;
  int print_div_def;
 
  if (!p || !space)
    return isl_printer_free(p);
 
  if (pos == 0)
    return isl_printer_print_isl_int(p, c);
 
  if (pos2type(space, &type, &pos) < 0)
    return isl_printer_free(p);
  print_div_def = type == isl_dim_div && can_print_div_expr(p, div, pos);
 
  if (isl_int_is_one(c))
    ;
  else if (isl_int_is_negone(c))
    p = isl_printer_print_str(p, "-");
  else {
    p = isl_printer_print_isl_int(p, c);
    if (p->output_format == ISL_FORMAT_C || print_div_def)
      p = isl_printer_print_str(p, "*");
  }
  if (print_div_def)
    p = print_div(space, div, pos, p);
  else
    p = print_name(space, p, type, pos, latex);
  return p;
}
 
static __isl_give isl_printer *print_affine_of_len(__isl_keep isl_space *space,
  __isl_keep isl_mat *div,
  __isl_take isl_printer *p, isl_int *c, int len)
{
  int i;
  int first;
 
  for (i = 0, first = 1; i < len; ++i) {
    int flip = 0;
    if (isl_int_is_zero(c[i]))
      continue;
    if (!first) {
      if (isl_int_is_neg(c[i])) {
        flip = 1;
        isl_int_neg(c[i], c[i]);
        p = isl_printer_print_str(p, " - ");
      } else 
        p = isl_printer_print_str(p, " + ");
    }
    first = 0;
    p = print_term(space, div, c[i], i, p, 0);
    if (flip)
      isl_int_neg(c[i], c[i]);
  }
  if (first)
    p = isl_printer_print_str(p, "0");
  return p;
}
 
/* Print an affine expression "c"
 * to "p", with the variable names taken from "space" and
 * the integer division definitions taken from "div".
 */
static __isl_give isl_printer *print_affine(__isl_take isl_printer *p,
  __isl_keep isl_space *space, __isl_keep isl_mat *div, isl_int *c)
{
  isl_size n_div, total;
  unsigned len;
 
  total = isl_space_dim(space, isl_dim_all);
  n_div = isl_mat_rows(div);
  if (total < 0 || n_div < 0)
    return isl_printer_free(p);
  len = 1 + total + n_div;
  return print_affine_of_len(space, div, p, c, len);
}
 
/* offset is the offset of local_space inside data->type of data->space.
 */
static __isl_give isl_printer *print_nested_var_list(__isl_take isl_printer *p,
  __isl_keep isl_space *local_space, enum isl_dim_type local_type,
  struct isl_print_space_data *data, int offset)
{
  int i;
  isl_size dim;
 
  if (data->space != local_space && local_type == isl_dim_out)
    offset += local_space->n_in;
 
  dim = isl_space_dim(local_space, local_type);
  if (dim < 0)
    return isl_printer_free(p);
  for (i = 0; i < dim; ++i) {
    if (i)
      p = isl_printer_print_str(p, ", ");
    if (data->print_dim)
      p = data->print_dim(p, data, offset + i);
    else
      p = print_name(data->space, p, data->type, offset + i,
          data->latex);
  }
  return p;
}
 
static __isl_give isl_printer *print_var_list(__isl_take isl_printer *p,
  __isl_keep isl_space *space, enum isl_dim_type type)
{
  struct isl_print_space_data data = { .space = space, .type = type };
 
  return print_nested_var_list(p, space, type, &data, 0);
}
 
static __isl_give isl_printer *print_nested_map_dim(__isl_take isl_printer *p,
  __isl_keep isl_space *local_dim,
  struct isl_print_space_data *data, int offset);
 
static __isl_give isl_printer *print_nested_tuple(__isl_take isl_printer *p,
  __isl_keep isl_space *local_space, enum isl_dim_type local_type,
  struct isl_print_space_data *data, int offset)
{
  const char *name = NULL;
  isl_size n = isl_space_dim(local_space, local_type);
 
  if (n < 0)
    return isl_printer_free(p);
  if ((local_type == isl_dim_in || local_type == isl_dim_out)) {
    name = isl_space_get_tuple_name(local_space, local_type);
    if (name) {
      if (data->latex)
        p = isl_printer_print_str(p, "\\mathrm{");
      p = isl_printer_print_str(p, name);
      if (data->latex)
        p = isl_printer_print_str(p, "}");
    }
  }
  if (!data->latex || n != 1 || name)
    p = isl_printer_print_str(p, s_open_list[data->latex]);
  if ((local_type == isl_dim_in || local_type == isl_dim_out) &&
      local_space->nested[local_type - isl_dim_in]) {
    if (data->space != local_space && local_type == isl_dim_out)
      offset += local_space->n_in;
    p = print_nested_map_dim(p,
        local_space->nested[local_type - isl_dim_in],
        data, offset);
  } else
    p = print_nested_var_list(p, local_space, local_type, data,
            offset);
  if (!data->latex || n != 1 || name)
    p = isl_printer_print_str(p, s_close_list[data->latex]);
  return p;
}
 
static __isl_give isl_printer *print_tuple(__isl_keep isl_space *space,
  __isl_take isl_printer *p, enum isl_dim_type type,
  struct isl_print_space_data *data)
{
  data->space = space;
  data->type = type;
  return print_nested_tuple(p, space, type, data, 0);
}
 
static __isl_give isl_printer *print_nested_map_dim(__isl_take isl_printer *p,
  __isl_keep isl_space *local_dim,
  struct isl_print_space_data *data, int offset)
{
  p = print_nested_tuple(p, local_dim, isl_dim_in, data, offset);
  p = isl_printer_print_str(p, s_to[data->latex]);
  p = print_nested_tuple(p, local_dim, isl_dim_out, data, offset);
 
  return p;
}
 
__isl_give isl_printer *isl_print_space(__isl_keep isl_space *space,
  __isl_take isl_printer *p, int rational,
  struct isl_print_space_data *data)
{
  if (rational && !data->latex)
    p = isl_printer_print_str(p, "rat: ");
  if (isl_space_is_params(space))
    ;
  else if (isl_space_is_set(space))
    p = print_tuple(space, p, isl_dim_set, data);
  else {
    p = print_tuple(space, p, isl_dim_in, data);
    p = isl_printer_print_str(p, s_to[data->latex]);
    p = print_tuple(space, p, isl_dim_out, data);
  }
 
  return p;
}
 
static __isl_give isl_printer *print_omega_parameters(
  __isl_keep isl_space *space, __isl_take isl_printer *p)
{
  isl_size nparam = isl_space_dim(space, isl_dim_param);
 
  if (nparam < 0)
    return isl_printer_free(p);
  if (nparam == 0)
    return p;
 
  p = isl_printer_start_line(p);
  p = isl_printer_print_str(p, "symbolic ");
  p = print_var_list(p, space, isl_dim_param);
  p = isl_printer_print_str(p, ";");
  p = isl_printer_end_line(p);
  return p;
}
 
/* Does the inequality constraint following "i" in "bmap"
 * have an opposite value for the same last coefficient?
 * "last" is the position of the last coefficient of inequality "i".
 * If the next constraint is a div constraint, then it is ignored
 * since div constraints are not printed.
 */
static isl_bool next_is_opposite(__isl_keep isl_basic_map *bmap, int i,
  int last)
{
  int r;
  isl_size total = isl_basic_map_dim(bmap, isl_dim_all);
  unsigned o_div = isl_basic_map_offset(bmap, isl_dim_div);
 
  if (total < 0)
    return isl_bool_error;
  if (i + 1 >= bmap->n_ineq)
    return isl_bool_false;
  if (isl_seq_last_non_zero(bmap->ineq[i + 1], 1 + total) != last)
    return isl_bool_false;
  if (last >= o_div) {
    isl_bool is_div;
    is_div = isl_basic_map_is_div_constraint(bmap,
              bmap->ineq[i + 1], last - o_div);
    if (is_div < 0)
      return isl_bool_error;
    if (is_div)
      return isl_bool_false;
  }
  r = isl_int_abs_eq(bmap->ineq[i][last], bmap->ineq[i + 1][last]) &&
      !isl_int_eq(bmap->ineq[i][last], bmap->ineq[i + 1][last]);
  return isl_bool_ok(r);
}
 
/* Return a string representation of the operator used when
 * printing a constraint where the LHS is greater than or equal to the LHS
 * (sign > 0) or smaller than or equal to the LHS (sign < 0).
 * If "strict" is set, then return the strict version of the comparison
 * operator.
 */
static const char *constraint_op(int sign, int strict, int latex)
{
  if (strict)
    return sign < 0 ? "<" : ">";
  if (sign < 0)
    return s_le[latex];
  else
    return s_ge[latex];
}
 
/* Print one side of a constraint "c" to "p", with
 * the variable names taken from "space" and the integer division definitions
 * taken from "div".
 * "last" is the position of the last non-zero coefficient.
 * Let c' be the result of zeroing out this coefficient, then
 * the partial constraint
 *
 *  c' op
 *
 * is printed.
 */
static __isl_give isl_printer *print_half_constraint(__isl_take isl_printer *p,
  __isl_keep isl_space *space, __isl_keep isl_mat *div,
  isl_int *c, int last, const char *op, int latex)
{
  isl_int_set_si(c[last], 0);
  p = print_affine(p, space, div, c);
 
  p = isl_printer_print_str(p, " ");
  p = isl_printer_print_str(p, op);
  p = isl_printer_print_str(p, " ");
 
  return p;
}
 
/* Print a constraint "c" to "p", with the variable names
 * taken from "space" and the integer division definitions taken from "div".
 * "last" is the position of the last non-zero coefficient, which is
 * moreover assumed to be negative.
 * Let c' be the result of zeroing out this coefficient, then
 * the constraint is printed in the form
 *
 *  -c[last] op c'
 */
static __isl_give isl_printer *print_constraint(__isl_take isl_printer *p,
  __isl_keep isl_space *space, __isl_keep isl_mat *div,
  isl_int *c, int last, const char *op, int latex)
{
  isl_int_abs(c[last], c[last]);
 
  p = print_term(space, div, c[last], last, p, latex);
 
  p = isl_printer_print_str(p, " ");
  p = isl_printer_print_str(p, op);
  p = isl_printer_print_str(p, " ");
 
  isl_int_set_si(c[last], 0);
  p = print_affine(p, space, div, c);
 
  return p;
}
 
/* Given an integer division
 *
 *  floor(f/m)
 *
 * at position "pos" in "div", print the corresponding modulo expression
 *
 *  (f) mod m
 *
 * to "p".  The variable names are taken from "space", while any
 * nested integer division definitions are taken from "div".
 */
static __isl_give isl_printer *print_mod(__isl_take isl_printer *p,
  __isl_keep isl_space *space, __isl_keep isl_mat *div, int pos,
  int latex)
{
  if (!p || !div)
    return isl_printer_free(p);
 
  p = isl_printer_print_str(p, "(");
  p = print_affine_of_len(space, div, p,
        div->row[pos] + 1, div->n_col - 1);
  p = isl_printer_print_str(p, ") ");
  p = isl_printer_print_str(p, s_mod[latex]);
  p = isl_printer_print_str(p, " ");
  p = isl_printer_print_isl_int(p, div->row[pos][0]);
  return p;
}
 
/* Given an equality constraint with a non-zero coefficient "c"
 * in position "pos", is this term of the form
 *
 *  a m floor(g/m),
 *
 * with c = a m?
 * Return the position of the corresponding integer division if so.
 * Return the number of integer divisions if not.
 * Return isl_size_error on error.
 *
 * Modulo constraints are currently not printed in C format.
 * Other than that, "pos" needs to correspond to an integer division
 * with explicit representation and "c" needs to be a multiple
 * of the denominator of the integer division.
 */
static isl_size print_as_modulo_pos(__isl_keep isl_printer *p,
  __isl_keep isl_space *space, __isl_keep isl_mat *div, unsigned pos,
  isl_int c)
{
  isl_bool can_print;
  isl_size n_div;
  enum isl_dim_type type;
 
  n_div = isl_mat_rows(div);
  if (!p || !space || n_div < 0)
    return isl_size_error;
  if (p->output_format == ISL_FORMAT_C)
    return n_div;
  if (pos2type(space, &type, &pos) < 0)
    return isl_size_error;
  if (type != isl_dim_div)
    return n_div;
  can_print = can_print_div_expr(p, div, pos);
  if (can_print < 0)
    return isl_size_error;
  if (!can_print)
    return n_div;
  if (!isl_int_is_divisible_by(c, div->row[pos][0]))
    return n_div;
  return pos;
}
 
/* Print equality constraint "c" to "p" as a modulo constraint,
 * with the variable names taken from "space" and
 * the integer division definitions taken from "div".
 * "last" is the position of the last non-zero coefficient, which is
 * moreover assumed to be negative and a multiple of the denominator
 * of the corresponding integer division.  "div_pos" is the corresponding
 * position in the sequence of integer divisions.
 *
 * The equality is of the form
 *
 *  f - a m floor(g/m) = 0.
 *
 * Print it as
 *
 *  a (g mod m) = -f + a g
 */
static __isl_give isl_printer *print_eq_mod_constraint(
  __isl_take isl_printer *p, __isl_keep isl_space *space,
  __isl_keep isl_mat *div, unsigned div_pos,
  isl_int *c, int last, int latex)
{
  isl_ctx *ctx;
  int multiple;
 
  ctx = isl_printer_get_ctx(p);
  isl_int_divexact(c[last], c[last], div->row[div_pos][0]);
  isl_int_abs(c[last], c[last]);
  multiple = !isl_int_is_one(c[last]);
  if (multiple) {
    p = isl_printer_print_isl_int(p, c[last]);
    p = isl_printer_print_str(p, "*(");
  }
  p = print_mod(p, space, div, div_pos, latex);
  if (multiple)
    p = isl_printer_print_str(p, ")");
  p = isl_printer_print_str(p, " = ");
  isl_seq_combine(c, ctx->negone, c,
          c[last], div->row[div_pos] + 1, last);
  isl_int_set_si(c[last], 0);
  p = print_affine(p, space, div, c);
  return p;
}
 
/* Print equality constraint "c" to "p", with the variable names
 * taken from "space" and the integer division definitions taken from "div".
 * "last" is the position of the last non-zero coefficient, which is
 * moreover assumed to be negative.
 *
 * If possible, print the equality constraint as a modulo constraint.
 */
static __isl_give isl_printer *print_eq_constraint(__isl_take isl_printer *p,
  __isl_keep isl_space *space, __isl_keep isl_mat *div, isl_int *c,
  int last, int latex)
{
  isl_size n_div;
  isl_size div_pos;
 
  n_div = isl_mat_rows(div);
  div_pos = print_as_modulo_pos(p, space, div, last, c[last]);
  if (n_div < 0 || div_pos < 0)
    return isl_printer_free(p);
  if (div_pos < n_div)
    return print_eq_mod_constraint(p, space, div, div_pos,
            c, last, latex);
  return print_constraint(p, space, div, c, last, "=", latex);
}
 
/* Print the constraints of "bmap" to "p".
 * The names of the variables are taken from "space" and
 * the integer division definitions are taken from "div".
 * Div constraints are only printed in "dump" mode.
 * The constraints are sorted prior to printing (except in "dump" mode).
 *
 * If x is the last variable with a non-zero coefficient,
 * then a lower bound
 *
 *  f - a x >= 0
 *
 * is printed as
 *
 *  a x <= f
 *
 * while an upper bound
 *
 *  f + a x >= 0
 *
 * is printed as
 *
 *  a x >= -f
 *
 * If the next constraint has an opposite sign for the same last coefficient,
 * then it is printed as
 *
 *  f >= a x
 *
 * or
 *
 *  -f <= a x
 *
 * instead.  In fact, the "a x" part is not printed explicitly, but
 * reused from the next constraint, which is therefore treated as
 * a first constraint in the conjunction.
 *
 * If the constant term of "f" is -1, then "f" is replaced by "f + 1" and
 * the comparison operator is replaced by the strict variant.
 * Essentially, ">= 1" is replaced by "> 0".
 */
static __isl_give isl_printer *print_constraints(__isl_keep isl_basic_map *bmap,
  __isl_keep isl_space *space, __isl_keep isl_mat *div,
  __isl_take isl_printer *p, int latex)
{
  int i;
  isl_vec *c = NULL;
  int rational = ISL_F_ISSET(bmap, ISL_BASIC_MAP_RATIONAL);
  isl_size total = isl_basic_map_dim(bmap, isl_dim_all);
  unsigned o_div = isl_basic_map_offset(bmap, isl_dim_div);
  int first = 1;
  int dump;
 
  if (total < 0 || !p)
    return isl_printer_free(p);
  bmap = isl_basic_map_copy(bmap);
  dump = p->dump;
  if (!dump)
    bmap = isl_basic_map_sort_constraints(bmap);
  if (!bmap)
    goto error;
 
  c = isl_vec_alloc(bmap->ctx, 1 + total);
  if (!c)
    goto error;
 
  for (i = bmap->n_eq - 1; i >= 0; --i) {
    int l = isl_seq_last_non_zero(bmap->eq[i], 1 + total);
    if (l < 0) {
      if (i != bmap->n_eq - 1)
        p = isl_printer_print_str(p, s_and[latex]);
      p = isl_printer_print_str(p, "0 = 0");
      continue;
    }
    if (!first)
      p = isl_printer_print_str(p, s_and[latex]);
    if (isl_int_is_neg(bmap->eq[i][l]))
      isl_seq_cpy(c->el, bmap->eq[i], 1 + total);
    else
      isl_seq_neg(c->el, bmap->eq[i], 1 + total);
    p = print_eq_constraint(p, space, div, c->el, l, latex);
    first = 0;
  }
  for (i = 0; i < bmap->n_ineq; ++i) {
    isl_bool combine;
    int l = isl_seq_last_non_zero(bmap->ineq[i], 1 + total);
    int strict;
    int s;
    const char *op;
    if (l < 0)
      continue;
    if (!dump && l >= o_div &&
        can_print_div_expr(p, div, l - o_div)) {
      isl_bool is_div;
      is_div = isl_basic_map_is_div_constraint(bmap,
                bmap->ineq[i], l - o_div);
      if (is_div < 0)
        goto error;
      if (is_div)
        continue;
    }
    if (!first)
      p = isl_printer_print_str(p, s_and[latex]);
    s = isl_int_sgn(bmap->ineq[i][l]);
    strict = !rational && isl_int_is_negone(bmap->ineq[i][0]);
    if (s < 0)
      isl_seq_cpy(c->el, bmap->ineq[i], 1 + total);
    else
      isl_seq_neg(c->el, bmap->ineq[i], 1 + total);
    if (strict)
      isl_int_set_si(c->el[0], 0);
    combine = dump ? isl_bool_false : next_is_opposite(bmap, i, l);
    if (combine < 0)
      goto error;
    if (combine) {
      op = constraint_op(-s, strict, latex);
      p = print_half_constraint(p, space, div, c->el, l,
            op, latex);
      first = 1;
    } else {
      op = constraint_op(s, strict, latex);
      p = print_constraint(p, space, div, c->el, l,
            op, latex);
      first = 0;
    }
  }
 
  isl_basic_map_free(bmap);
  isl_vec_free(c);
 
  return p;
error:
  isl_basic_map_free(bmap);
  isl_vec_free(c);
  isl_printer_free(p);
  return NULL;
}
 
static __isl_give isl_printer *print_div(__isl_keep isl_space *space,
  __isl_keep isl_mat *div, int pos, __isl_take isl_printer *p)
{
  int c;
 
  if (!p || !div)
    return isl_printer_free(p);
 
  c = p->output_format == ISL_FORMAT_C;
  p = isl_printer_print_str(p, c ? "floord(" : "floor((");
  p = print_affine_of_len(space, div, p,
        div->row[pos] + 1, div->n_col - 1);
  p = isl_printer_print_str(p, c ? ", " : ")/");
  p = isl_printer_print_isl_int(p, div->row[pos][0]);
  p = isl_printer_print_str(p, ")");
  return p;
}
 
/* Print a comma separated list of div names, except those that have
 * a definition that can be printed.
 * If "print_defined_divs" is set, then those div names are printed
 * as well, along with their definitions.
 */
static __isl_give isl_printer *print_div_list(__isl_take isl_printer *p,
  __isl_keep isl_space *space, __isl_keep isl_mat *div, int latex,
  int print_defined_divs)
{
  int i;
  int first = 1;
  isl_size n_div;
 
  n_div = isl_mat_rows(div);
  if (!p || !space || n_div < 0)
    return isl_printer_free(p);
 
  for (i = 0; i < n_div; ++i) {
    if (!print_defined_divs && can_print_div_expr(p, div, i))
      continue;
    if (!first)
      p = isl_printer_print_str(p, ", ");
    p = print_name(space, p, isl_dim_div, i, latex);
    first = 0;
    if (!can_print_div_expr(p, div, i))
      continue;
    p = isl_printer_print_str(p, " = ");
    p = print_div(space, div, i, p);
  }
 
  return p;
}
 
/* Does printing an object with local variables described by "div"
 * require an "exists" clause?
 * That is, are there any local variables without an explicit representation?
 * An exists clause is also needed in "dump" mode because
 * explicit div representations are not printed inline in that case.
 */
static isl_bool need_exists(__isl_keep isl_printer *p, __isl_keep isl_mat *div)
{
  int i;
  isl_size n;
 
  n = isl_mat_rows(div);
  if (!p || n < 0)
    return isl_bool_error;
  if (n == 0)
    return isl_bool_false;
  if (p->dump)
    return isl_bool_true;
  for (i = 0; i < n; ++i)
    if (!can_print_div_expr(p, div, i))
      return isl_bool_true;
  return isl_bool_false;
}
 
/* Print the start of an exists clause, i.e.,
 *
 *  (exists variables:
 *
 * In dump mode, local variables with an explicit definition are printed
 * as well because they will not be printed inline.
 */
static __isl_give isl_printer *open_exists(__isl_take isl_printer *p,
  __isl_keep isl_space *space, __isl_keep isl_mat *div, int latex)
{
  int dump;
 
  if (!p)
    return NULL;
 
  dump = p->dump;
  p = isl_printer_print_str(p, s_open_exists[latex]);
  p = print_div_list(p, space, div, latex, dump);
  p = isl_printer_print_str(p, ": ");
 
  return p;
}
 
/* Remove the explicit representations of all local variables in "div".
 */
static __isl_give isl_mat *mark_all_unknown(__isl_take isl_mat *div)
{
  int i;
  isl_size n_div;
 
  n_div = isl_mat_rows(div);
  if (n_div < 0)
    return isl_mat_free(div);
 
  for (i = 0; i < n_div; ++i)
    div = isl_mat_set_element_si(div, i, 0, 0);
  return div;
}
 
/* Print the constraints of "bmap" to "p".
 * The names of the variables are taken from "space".
 * "latex" is set if the constraints should be printed in LaTeX format.
 * Do not print inline explicit div representations in "dump" mode.
 */
static __isl_give isl_printer *print_disjunct(__isl_keep isl_basic_map *bmap,
  __isl_keep isl_space *space, __isl_take isl_printer *p, int latex)
{
  int dump;
  isl_mat *div;
  isl_bool exists;
 
  if (!p)
    return NULL;
  dump = p->dump;
  div = isl_basic_map_get_divs(bmap);
  exists = need_exists(p, div);
  if (exists >= 0 && exists)
    p = open_exists(p, space, div, latex);
 
  if (dump)
    div = mark_all_unknown(div);
  p = print_constraints(bmap, space, div, p, latex);
  isl_mat_free(div);
 
  if (exists >= 0 && exists)
    p = isl_printer_print_str(p, s_close_exists[latex]);
  return p;
}
 
/* Print a colon followed by the constraints of "bmap"
 * to "p", provided there are any constraints.
 * The names of the variables are taken from "space".
 * "latex" is set if the constraints should be printed in LaTeX format.
 */
static __isl_give isl_printer *print_optional_disjunct(
  __isl_keep isl_basic_map *bmap, __isl_keep isl_space *space,
  __isl_take isl_printer *p, int latex)
{
  if (isl_basic_map_plain_is_universe(bmap))
    return p;
 
  p = isl_printer_print_str(p, ": ");
  p = print_disjunct(bmap, space, p, latex);
 
  return p;
}
 
static __isl_give isl_printer *basic_map_print_omega(
  __isl_keep isl_basic_map *bmap, __isl_take isl_printer *p)
{
  p = isl_printer_print_str(p, "{ [");
  p = print_var_list(p, bmap->dim, isl_dim_in);
  p = isl_printer_print_str(p, "] -> [");
  p = print_var_list(p, bmap->dim, isl_dim_out);
  p = isl_printer_print_str(p, "] ");
  p = print_optional_disjunct(bmap, bmap->dim, p, 0);
  p = isl_printer_print_str(p, " }");
  return p;
}
 
static __isl_give isl_printer *basic_set_print_omega(
  __isl_keep isl_basic_set *bset, __isl_take isl_printer *p)
{
  p = isl_printer_print_str(p, "{ [");
  p = print_var_list(p, bset->dim, isl_dim_set);
  p = isl_printer_print_str(p, "] ");
  p = print_optional_disjunct(bset, bset->dim, p, 0);
  p = isl_printer_print_str(p, " }");
  return p;
}
 
static __isl_give isl_printer *isl_map_print_omega(__isl_keep isl_map *map,
  __isl_take isl_printer *p)
{
  int i;
 
  for (i = 0; i < map->n; ++i) {
    if (i)
      p = isl_printer_print_str(p, " union ");
    p = basic_map_print_omega(map->p[i], p);
  }
  return p;
}
 
static __isl_give isl_printer *isl_set_print_omega(__isl_keep isl_set *set,
  __isl_take isl_printer *p)
{
  int i;
 
  for (i = 0; i < set->n; ++i) {
    if (i)
      p = isl_printer_print_str(p, " union ");
    p = basic_set_print_omega(set->p[i], p);
  }
  return p;
}
 
/* Print the list of parameters in "space", followed by an arrow, to "p",
 * if there are any parameters.
 */
static __isl_give isl_printer *print_param_tuple(__isl_take isl_printer *p,
  __isl_keep isl_space *space, struct isl_print_space_data *data)
{
  isl_size nparam;
 
  nparam = isl_space_dim(space, isl_dim_param);
  if (!p || nparam < 0)
    return isl_printer_free(p);
  if (nparam == 0)
    return p;
 
  p = print_tuple(space, p, isl_dim_param, data);
  p = isl_printer_print_str(p, s_to[data->latex]);
 
  return p;
}
 
static __isl_give isl_printer *isl_basic_map_print_isl(
  __isl_keep isl_basic_map *bmap, __isl_take isl_printer *p,
  int latex)
{
  struct isl_print_space_data data = { .latex = latex };
  int rational = ISL_F_ISSET(bmap, ISL_BASIC_MAP_RATIONAL);
 
  p = print_param_tuple(p, bmap->dim, &data);
  p = isl_printer_print_str(p, "{ ");
  p = isl_print_space(bmap->dim, p, rational, &data);
  p = isl_printer_print_str(p, " : ");
  p = print_disjunct(bmap, bmap->dim, p, latex);
  p = isl_printer_print_str(p, " }");
  return p;
}
 
/* Print the disjuncts of a map (or set) "map" to "p".
 * The names of the variables are taken from "space".
 * "latex" is set if the constraints should be printed in LaTeX format.
 */
static __isl_give isl_printer *print_disjuncts_core(__isl_keep isl_map *map,
  __isl_keep isl_space *space, __isl_take isl_printer *p, int latex)
{
  int i;
 
  if (map->n == 0)
    p = isl_printer_print_str(p, "false");
  for (i = 0; i < map->n; ++i) {
    if (i)
      p = isl_printer_print_str(p, s_or[latex]);
    if (map->n > 1 && map->p[i]->n_eq + map->p[i]->n_ineq > 1)
      p = isl_printer_print_str(p, "(");
    p = print_disjunct(map->p[i], space, p, latex);
    if (map->n > 1 && map->p[i]->n_eq + map->p[i]->n_ineq > 1)
      p = isl_printer_print_str(p, ")");
  }
  return p;
}
 
/* Print the disjuncts of a map (or set) "map" to "p".
 * The names of the variables are taken from "space".
 * "hull" describes constraints shared by all disjuncts of "map".
 * "latex" is set if the constraints should be printed in LaTeX format.
 *
 * Print the disjuncts as a conjunction of "hull" and
 * the result of removing the constraints of "hull" from "map".
 * If this result turns out to be the universe, then simply print "hull".
 */
static __isl_give isl_printer *print_disjuncts_in_hull(__isl_keep isl_map *map,
  __isl_keep isl_space *space, __isl_take isl_basic_map *hull,
  __isl_take isl_printer *p, int latex)
{
  isl_bool is_universe;
 
  p = print_disjunct(hull, space, p, latex);
  map = isl_map_plain_gist_basic_map(isl_map_copy(map), hull);
  is_universe = isl_map_plain_is_universe(map);
  if (is_universe < 0)
    goto error;
  if (!is_universe) {
    p = isl_printer_print_str(p, s_and[latex]);
    p = isl_printer_print_str(p, "(");
    p = print_disjuncts_core(map, space, p, latex);
    p = isl_printer_print_str(p, ")");
  }
  isl_map_free(map);
 
  return p;
error:
  isl_map_free(map);
  isl_printer_free(p);
  return NULL;
}
 
/* Print the disjuncts of a map (or set) "map" to "p".
 * The names of the variables are taken from "space".
 * "latex" is set if the constraints should be printed in LaTeX format.
 *
 * If there are at least two disjuncts and "dump" mode is not turned out,
 * check for any shared constraints among all disjuncts.
 * If there are any, then print them separately in print_disjuncts_in_hull.
 */
static __isl_give isl_printer *print_disjuncts(__isl_keep isl_map *map,
  __isl_keep isl_space *space, __isl_take isl_printer *p, int latex)
{
  if (isl_map_plain_is_universe(map))
    return p;
 
  p = isl_printer_print_str(p, s_such_that[latex]);
  if (!p)
    return NULL;
 
  if (!p->dump && map->n >= 2) {
    isl_basic_map *hull;
    isl_bool is_universe;
 
    hull = isl_map_plain_unshifted_simple_hull(isl_map_copy(map));
    is_universe = isl_basic_map_plain_is_universe(hull);
    if (is_universe < 0)
      p = isl_printer_free(p);
    else if (!is_universe)
      return print_disjuncts_in_hull(map, space, hull,
              p, latex);
    isl_basic_map_free(hull);
  }
 
  return print_disjuncts_core(map, space, p, latex);
}
 
/* Print the disjuncts of a map (or set).
 * The names of the variables are taken from "space".
 * "latex" is set if the constraints should be printed in LaTeX format.
 *
 * If the map turns out to be a universal parameter domain, then
 * we need to print the colon.  Otherwise, the output looks identical
 * to the empty set.
 */
static __isl_give isl_printer *print_disjuncts_map(__isl_keep isl_map *map,
  __isl_keep isl_space *space, __isl_take isl_printer *p, int latex)
{
  if (isl_map_plain_is_universe(map) && isl_space_is_params(map->dim))
    return isl_printer_print_str(p, s_such_that[latex]);
  else
    return print_disjuncts(map, space, p, latex);
}
 
/* Print the disjuncts of a set.
 * The names of the variables are taken from "space".
 * "latex" is set if the constraints should be printed in LaTeX format.
 */
static __isl_give isl_printer *print_disjuncts_set(__isl_keep isl_set *set,
  __isl_keep isl_space *space, __isl_take isl_printer *p, int latex)
{
  return print_disjuncts_map(set_to_map(set), space, p, latex);
}
 
struct isl_aff_split {
  isl_basic_map *aff;
  isl_map *map;
};
 
static void free_split(__isl_take struct isl_aff_split *split, int n)
{
  int i;
 
  if (!split)
    return;
 
  for (i = 0; i < n; ++i) {
    isl_basic_map_free(split[i].aff);
    isl_map_free(split[i].map);
  }
 
  free(split);
}
 
static __isl_give isl_basic_map *get_aff(__isl_take isl_basic_map *bmap)
{
  int i, j;
  isl_size nparam, n_in, n_out, total;
 
  bmap = isl_basic_map_cow(bmap);
  if (!bmap)
    return NULL;
  bmap = isl_basic_map_free_inequality(bmap, bmap->n_ineq);
 
  nparam = isl_basic_map_dim(bmap, isl_dim_param);
  n_in = isl_basic_map_dim(bmap, isl_dim_in);
  n_out = isl_basic_map_dim(bmap, isl_dim_out);
  total = isl_basic_map_dim(bmap, isl_dim_all);
  if (n_in < 0 || n_out < 0 || nparam < 0 || total < 0)
    return isl_basic_map_free(bmap);
 
  for (i = bmap->n_eq - 1; i >= 0; --i) {
    j = isl_seq_last_non_zero(bmap->eq[i] + 1, total);
    if (j >= nparam && j < nparam + n_in + n_out &&
        (isl_int_is_one(bmap->eq[i][1 + j]) ||
         isl_int_is_negone(bmap->eq[i][1 + j])))
      continue;
    if (isl_basic_map_drop_equality(bmap, i) < 0)
      goto error;
  }
 
  bmap = isl_basic_map_finalize(bmap);
 
  return bmap;
error:
  isl_basic_map_free(bmap);
  return NULL;
}
 
static int aff_split_cmp(const void *p1, const void *p2, void *user)
{
  const struct isl_aff_split *s1, *s2;
  s1 = (const struct isl_aff_split *) p1;
  s2 = (const struct isl_aff_split *) p2;
 
  return isl_basic_map_plain_cmp(s1->aff, s2->aff);
}
 
static __isl_give isl_basic_map *drop_aff(__isl_take isl_basic_map *bmap,
  __isl_keep isl_basic_map *aff)
{
  int i, j;
  isl_size v_div;
 
  v_div = isl_basic_map_var_offset(bmap, isl_dim_div);
  if (v_div < 0 || !aff)
    goto error;
 
  for (i = bmap->n_eq - 1; i >= 0; --i) {
    if (isl_seq_any_non_zero(bmap->eq[i] + 1 + v_div, bmap->n_div))
      continue;
    for (j = 0; j < aff->n_eq; ++j) {
      if (!isl_seq_eq(bmap->eq[i], aff->eq[j], 1 + v_div) &&
          !isl_seq_is_neg(bmap->eq[i], aff->eq[j], 1 + v_div))
        continue;
      if (isl_basic_map_drop_equality(bmap, i) < 0)
        goto error;
      break;
    }
  }
 
  return bmap;
error:
  isl_basic_map_free(bmap);
  return NULL;
}
 
static __isl_give struct isl_aff_split *split_aff(__isl_keep isl_map *map)
{
  int i, n;
  struct isl_aff_split *split;
  isl_ctx *ctx;
 
  ctx = isl_map_get_ctx(map);
  split = isl_calloc_array(ctx, struct isl_aff_split, map->n);
  if (!split)
    return NULL;
 
  for (i = 0; i < map->n; ++i) {
    isl_basic_map *bmap;
    split[i].aff = get_aff(isl_basic_map_copy(map->p[i]));
    bmap = isl_basic_map_copy(map->p[i]);
    bmap = isl_basic_map_cow(bmap);
    bmap = drop_aff(bmap, split[i].aff);
    split[i].map = isl_map_from_basic_map(bmap);
    if (!split[i].aff || !split[i].map)
      goto error;
  }
 
  if (isl_sort(split, map->n, sizeof(struct isl_aff_split),
      &aff_split_cmp, NULL) < 0)
    goto error;
 
  n = map->n;
  for (i = n - 1; i >= 1; --i) {
    if (!isl_basic_map_plain_is_equal(split[i - 1].aff,
             split[i].aff))
      continue;
    isl_basic_map_free(split[i].aff);
    split[i - 1].map = isl_map_union(split[i - 1].map,
             split[i].map);
    if (i != n - 1)
      split[i] = split[n - 1];
    split[n - 1].aff = NULL;
    split[n - 1].map = NULL;
    --n;
  }
 
  return split;
error:
  free_split(split, map->n);
  return NULL;
}
 
/* Given a set of equality constraints "eq" obtained from get_aff,
 * i.e., with a (positive or negative) unit coefficient in the last position,
 * look for an equality constraint in "eq" that defines
 * the "type" variable at position "pos" in "space",
 * i.e., where that last coefficient corresponds to the given variable.
 * If so, return the position of that equality constraint.
 * Return a value beyond the number of equality constraints
 * if no such constraint can be found.
 * Return isl_size_error in case of error.
 *
 * If a suitable constraint is found, then also make sure
 * it has a negative unit coefficient for the given variable.
 */
static isl_size defining_equality(__isl_keep isl_basic_map *eq,
  __isl_keep isl_space *space, enum isl_dim_type type, int pos)
{
  int i;
  isl_size total, off;
  isl_size n_eq;
 
  total = isl_basic_map_dim(eq, isl_dim_all);
  n_eq = isl_basic_map_n_equality(eq);
  off = isl_space_offset(space, type);
  if (total < 0 || n_eq < 0 || off < 0)
    return isl_size_error;
 
  pos += off;
 
  for (i = 0; i < n_eq; ++i) {
    if (isl_seq_last_non_zero(eq->eq[i] + 1, total) != pos)
      continue;
    if (isl_int_is_one(eq->eq[i][1 + pos]))
      isl_seq_neg(eq->eq[i], eq->eq[i], 1 + total);
    return i;
  }
 
  return n_eq;
}
 
/* Print dimension "pos" of data->space to "p".
 *
 * data->user is assumed to be an isl_basic_map keeping track of equalities.
 *
 * If the current dimension is defined by these equalities, then print
 * the corresponding expression, assigned to the name of the dimension
 * if there is any.  Otherwise, print the name of the dimension.
 */
static __isl_give isl_printer *print_dim_eq(__isl_take isl_printer *p,
  struct isl_print_space_data *data, unsigned pos)
{
  isl_basic_map *eq = data->user;
  isl_size j, n_eq;
 
  n_eq = isl_basic_map_n_equality(eq);
  j = defining_equality(eq, data->space, data->type, pos);
  if (j < 0 || n_eq < 0)
    return isl_printer_free(p);
  if (j < n_eq) {
    isl_size off;
 
    if (isl_space_has_dim_name(data->space, data->type, pos)) {
      p = print_name(data->space, p, data->type, pos,
          data->latex);
      p = isl_printer_print_str(p, " = ");
    }
    off = isl_space_offset(data->space, data->type);
    if (off < 0)
      return isl_printer_free(p);
    pos += 1 + off;
    p = print_affine_of_len(data->space, NULL, p, eq->eq[j], pos);
  } else {
    p = print_name(data->space, p, data->type, pos, data->latex);
  }
 
  return p;
}
 
static __isl_give isl_printer *print_split_map(__isl_take isl_printer *p,
  struct isl_aff_split *split, int n, __isl_keep isl_space *space)
{
  struct isl_print_space_data data = { 0 };
  int i;
  int rational;
 
  data.print_dim = &print_dim_eq;
  for (i = 0; i < n; ++i) {
    if (!split[i].map)
      break;
    rational = split[i].map->n > 0 &&
        ISL_F_ISSET(split[i].map->p[0], ISL_BASIC_MAP_RATIONAL);
    if (i)
      p = isl_printer_print_str(p, "; ");
    data.user = split[i].aff;
    p = isl_print_space(space, p, rational, &data);
    p = print_disjuncts_map(split[i].map, space, p, 0);
  }
 
  return p;
}
 
static __isl_give isl_printer *print_body_map(__isl_take isl_printer *p,
  __isl_keep isl_map *map)
{
  struct isl_print_space_data data = { 0 };
  struct isl_aff_split *split = NULL;
  int rational;
 
  if (!p || !map)
    return isl_printer_free(p);
  if (!p->dump && map->n > 0)
    split = split_aff(map);
  if (split) {
    p = print_split_map(p, split, map->n, map->dim);
  } else {
    rational = map->n > 0 &&
        ISL_F_ISSET(map->p[0], ISL_BASIC_MAP_RATIONAL);
    p = isl_print_space(map->dim, p, rational, &data);
    p = print_disjuncts_map(map, map->dim, p, 0);
  }
  free_split(split, map->n);
  return p;
}
 
static __isl_give isl_printer *isl_map_print_isl(__isl_keep isl_map *map,
  __isl_take isl_printer *p)
{
  struct isl_print_space_data data = { 0 };
 
  p = print_param_tuple(p, map->dim, &data);
  p = isl_printer_print_str(p, s_open_set[0]);
  p = print_body_map(p, map);
  p = isl_printer_print_str(p, s_close_set[0]);
  return p;
}
 
static __isl_give isl_printer *print_latex_map(__isl_keep isl_map *map,
  __isl_take isl_printer *p, __isl_keep isl_basic_map *aff)
{
  struct isl_print_space_data data = { 0 };
 
  data.latex = 1;
  p = print_param_tuple(p, map->dim, &data);
  p = isl_printer_print_str(p, s_open_set[1]);
  data.print_dim = &print_dim_eq;
  data.user = aff;
  p = isl_print_space(map->dim, p, 0, &data);
  p = print_disjuncts_map(map, map->dim, p, 1);
  p = isl_printer_print_str(p, s_close_set[1]);
 
  return p;
}
 
static __isl_give isl_printer *isl_map_print_latex(__isl_keep isl_map *map,
  __isl_take isl_printer *p)
{
  int i;
  struct isl_aff_split *split = NULL;
 
  if (map->n > 0)
    split = split_aff(map);
 
  if (!split)
    return print_latex_map(map, p, NULL);
 
  for (i = 0; i < map->n; ++i) {
    if (!split[i].map)
      break;
    if (i)
      p = isl_printer_print_str(p, " \\cup ");
    p = print_latex_map(split[i].map, p, split[i].aff);
  }
 
  free_split(split, map->n);
  return p;
}
 
__isl_give isl_printer *isl_printer_print_basic_map(__isl_take isl_printer *p,
  __isl_keep isl_basic_map *bmap)
{
  if (!p || !bmap)
    goto error;
  if (p->output_format == ISL_FORMAT_ISL)
    return isl_basic_map_print_isl(bmap, p, 0);
  else if (p->output_format == ISL_FORMAT_OMEGA)
    return basic_map_print_omega(bmap, p);
  isl_assert(bmap->ctx, 0, goto error);
error:
  isl_printer_free(p);
  return NULL;
}
 
__isl_give isl_printer *isl_printer_print_basic_set(__isl_take isl_printer *p,
  __isl_keep isl_basic_set *bset)
{
  if (!p || !bset)
    goto error;
 
  if (p->output_format == ISL_FORMAT_ISL)
    return isl_basic_map_print_isl(bset, p, 0);
  else if (p->output_format == ISL_FORMAT_POLYLIB)
    return isl_basic_set_print_polylib(bset, p, 0);
  else if (p->output_format == ISL_FORMAT_EXT_POLYLIB)
    return isl_basic_set_print_polylib(bset, p, 1);
  else if (p->output_format == ISL_FORMAT_POLYLIB_CONSTRAINTS)
    return bset_print_constraints_polylib(bset, p);
  else if (p->output_format == ISL_FORMAT_OMEGA)
    return basic_set_print_omega(bset, p);
  isl_assert(p->ctx, 0, goto error);
error:
  isl_printer_free(p);
  return NULL;
}
 
__isl_give isl_printer *isl_printer_print_set(__isl_take isl_printer *p,
  __isl_keep isl_set *set)
{
  if (!p || !set)
    goto error;
  if (p->output_format == ISL_FORMAT_ISL)
    return isl_map_print_isl(set_to_map(set), p);
  else if (p->output_format == ISL_FORMAT_POLYLIB)
    return isl_set_print_polylib(set, p, 0);
  else if (p->output_format == ISL_FORMAT_EXT_POLYLIB)
    return isl_set_print_polylib(set, p, 1);
  else if (p->output_format == ISL_FORMAT_OMEGA)
    return isl_set_print_omega(set, p);
  else if (p->output_format == ISL_FORMAT_LATEX)
    return isl_map_print_latex(set_to_map(set), p);
  isl_assert(set->ctx, 0, goto error);
error:
  isl_printer_free(p);
  return NULL;
}
 
__isl_give isl_printer *isl_printer_print_map(__isl_take isl_printer *p,
  __isl_keep isl_map *map)
{
  if (!p || !map)
    goto error;
 
  if (p->output_format == ISL_FORMAT_ISL)
    return isl_map_print_isl(map, p);
  else if (p->output_format == ISL_FORMAT_POLYLIB)
    return isl_map_print_polylib(map, p, 0);
  else if (p->output_format == ISL_FORMAT_EXT_POLYLIB)
    return isl_map_print_polylib(map, p, 1);
  else if (p->output_format == ISL_FORMAT_OMEGA)
    return isl_map_print_omega(map, p);
  else if (p->output_format == ISL_FORMAT_LATEX)
    return isl_map_print_latex(map, p);
  isl_assert(map->ctx, 0, goto error);
error:
  isl_printer_free(p);
  return NULL;
}
 
struct isl_union_print_data {
  isl_printer *p;
  int first;
};
 
#undef BASE
#define BASE  map
#include "isl_union_print_templ.c"
 
/* Print the body of "uset" (everything except the parameter declarations)
 * to "p" in isl format.
 */
static __isl_give isl_printer *isl_printer_print_union_set_isl_body(
  __isl_take isl_printer *p, __isl_keep isl_union_set *uset)
{
  return print_body_union_map(p, uset_to_umap(uset));
}
 
static isl_stat print_latex_map_body(__isl_take isl_map *map, void *user)
{
  struct isl_union_print_data *data;
  data = (struct isl_union_print_data *)user;
 
  if (!data->first)
    data->p = isl_printer_print_str(data->p, " \\cup ");
  data->first = 0;
 
  data->p = isl_map_print_latex(map, data->p);
  isl_map_free(map);
 
  return isl_stat_ok;
}
 
static __isl_give isl_printer *isl_union_map_print_latex(
  __isl_keep isl_union_map *umap, __isl_take isl_printer *p)
{
  struct isl_union_print_data data = { p, 1 };
  isl_union_map_foreach_map(umap, &print_latex_map_body, &data);
  p = data.p;
  return p;
}
 
__isl_give isl_printer *isl_printer_print_union_map(__isl_take isl_printer *p,
  __isl_keep isl_union_map *umap)
{
  if (!p || !umap)
    goto error;
 
  if (p->output_format == ISL_FORMAT_ISL)
    return print_union_map_isl(p, umap);
  if (p->output_format == ISL_FORMAT_LATEX)
    return isl_union_map_print_latex(umap, p);
 
  isl_die(p->ctx, isl_error_invalid,
    "invalid output format for isl_union_map", goto error);
error:
  isl_printer_free(p);
  return NULL;
}
 
__isl_give isl_printer *isl_printer_print_union_set(__isl_take isl_printer *p,
  __isl_keep isl_union_set *uset)
{
  if (!p || !uset)
    goto error;
 
  if (p->output_format == ISL_FORMAT_ISL)
    return print_union_map_isl(p, uset_to_umap(uset));
  if (p->output_format == ISL_FORMAT_LATEX)
    return isl_union_map_print_latex(uset_to_umap(uset), p);
 
  isl_die(p->ctx, isl_error_invalid,
    "invalid output format for isl_union_set", goto error);
error:
  isl_printer_free(p);
  return NULL;
}
 
static isl_size poly_rec_n_non_zero(__isl_keep isl_poly_rec *rec)
{
  int i;
  int n;
 
  if (!rec)
    return isl_size_error;
 
  for (i = 0, n = 0; i < rec->n; ++i) {
    isl_bool is_zero = isl_poly_is_zero(rec->p[i]);
 
    if (is_zero < 0)
      return isl_size_error;
    if (!is_zero)
      ++n;
  }
 
  return n;
}
 
static __isl_give isl_printer *poly_print_cst(__isl_keep isl_poly *poly,
  __isl_take isl_printer *p, int first)
{
  isl_poly_cst *cst;
  int neg;
 
  cst = isl_poly_as_cst(poly);
  if (!cst)
    goto error;
  neg = !first && isl_int_is_neg(cst->n);
  if (!first)
    p = isl_printer_print_str(p, neg ? " - " :  " + ");
  if (neg)
    isl_int_neg(cst->n, cst->n);
  if (isl_int_is_zero(cst->d)) {
    int sgn = isl_int_sgn(cst->n);
    p = isl_printer_print_str(p, sgn < 0 ? "-infty" :
              sgn == 0 ? "NaN" : "infty");
  } else
    p = isl_printer_print_isl_int(p, cst->n);
  if (neg)
    isl_int_neg(cst->n, cst->n);
  if (!isl_int_is_zero(cst->d) && !isl_int_is_one(cst->d)) {
    p = isl_printer_print_str(p, "/");
    p = isl_printer_print_isl_int(p, cst->d);
  }
  return p;
error:
  isl_printer_free(p);
  return NULL;
}
 
static __isl_give isl_printer *print_base(__isl_take isl_printer *p,
  __isl_keep isl_space *space, __isl_keep isl_mat *div, int var)
{
  isl_size total;
 
  total = isl_space_dim(space, isl_dim_all);
  if (total < 0)
    return isl_printer_free(p);
  if (var < total)
    p = print_term(space, NULL, space->ctx->one, 1 + var, p, 0);
  else
    p = print_div(space, div, var - total, p);
  return p;
}
 
static __isl_give isl_printer *print_pow(__isl_take isl_printer *p,
  __isl_keep isl_space *space, __isl_keep isl_mat *div, int var, int exp)
{
  p = print_base(p, space, div, var);
  if (exp == 1)
    return p;
  if (p->output_format == ISL_FORMAT_C) {
    int i;
    for (i = 1; i < exp; ++i) {
      p = isl_printer_print_str(p, "*");
      p = print_base(p, space, div, var);
    }
  } else {
    p = isl_printer_print_str(p, "^");
    p = isl_printer_print_int(p, exp);
  }
  return p;
}
 
/* Print the polynomial "poly" defined over the domain space "space" and
 * local variables defined by "div" to "p".
 */
static __isl_give isl_printer *poly_print(__isl_keep isl_poly *poly,
  __isl_keep isl_space *space, __isl_keep isl_mat *div,
  __isl_take isl_printer *p)
{
  int i, first, print_parens;
  isl_size n;
  isl_bool is_cst;
  isl_poly_rec *rec;
 
  is_cst = isl_poly_is_cst(poly);
  if (!p || is_cst < 0 || !space || !div)
    goto error;
 
  if (is_cst)
    return poly_print_cst(poly, p, 1);
 
  rec = isl_poly_as_rec(poly);
  n = poly_rec_n_non_zero(rec);
  if (n < 0)
    return isl_printer_free(p);
  print_parens = n > 1;
  if (print_parens)
    p = isl_printer_print_str(p, "(");
  for (i = 0, first = 1; i < rec->n; ++i) {
    isl_bool is_zero = isl_poly_is_zero(rec->p[i]);
    isl_bool is_one = isl_poly_is_one(rec->p[i]);
    isl_bool is_negone = isl_poly_is_negone(rec->p[i]);
    isl_bool is_cst = isl_poly_is_cst(rec->p[i]);
 
    if (is_zero < 0 || is_one < 0 || is_negone < 0)
      return isl_printer_free(p);
    if (is_zero)
      continue;
    if (is_negone) {
      if (!i)
        p = isl_printer_print_str(p, "-1");
      else if (first)
        p = isl_printer_print_str(p, "-");
      else
        p = isl_printer_print_str(p, " - ");
    } else if (is_cst && !is_one)
      p = poly_print_cst(rec->p[i], p, first);
    else {
      if (!first)
        p = isl_printer_print_str(p, " + ");
      if (i == 0 || !is_one)
        p = poly_print(rec->p[i], space, div, p);
    }
    first = 0;
    if (i == 0)
      continue;
    if (!is_one && !is_negone)
      p = isl_printer_print_str(p, " * ");
    p = print_pow(p, space, div, rec->poly.var, i);
  }
  if (print_parens)
    p = isl_printer_print_str(p, ")");
  return p;
error:
  isl_printer_free(p);
  return NULL;
}
 
static __isl_give isl_printer *print_qpolynomial(__isl_take isl_printer *p,
  __isl_keep isl_qpolynomial *qp)
{
  if (!p || !qp)
    goto error;
  p = poly_print(qp->poly, qp->dim, qp->div, p);
  return p;
error:
  isl_printer_free(p);
  return NULL;
}
 
static __isl_give isl_printer *print_qpolynomial_isl(__isl_take isl_printer *p,
  __isl_keep isl_qpolynomial *qp)
{
  struct isl_print_space_data data = { 0 };
 
  if (!p || !qp)
    goto error;
 
  p = print_param_tuple(p, qp->dim, &data);
  p = isl_printer_print_str(p, "{ ");
  if (!isl_space_is_params(qp->dim)) {
    p = isl_print_space(qp->dim, p, 0, &data);
    p = isl_printer_print_str(p, " -> ");
  }
  p = print_qpolynomial(p, qp);
  p = isl_printer_print_str(p, " }");
  return p;
error:
  isl_printer_free(p);
  return NULL;
}
 
/* Print the quasi-polynomial "qp" to "p" in C format, with the variable names
 * taken from the domain space "space".
 */
static __isl_give isl_printer *print_qpolynomial_c(__isl_take isl_printer *p,
  __isl_keep isl_space *space, __isl_keep isl_qpolynomial *qp)
{
  isl_bool is_one;
  isl_val *den;
 
  den = isl_qpolynomial_get_den(qp);
  qp = isl_qpolynomial_copy(qp);
  qp = isl_qpolynomial_scale_val(qp, isl_val_copy(den));
  is_one = isl_val_is_one(den);
  if (is_one < 0)
    p = isl_printer_free(p);
  if (!is_one)
    p = isl_printer_print_str(p, "(");
  if (qp)
    p = poly_print(qp->poly, space, qp->div, p);
  else
    p = isl_printer_free(p);
  if (!is_one) {
    p = isl_printer_print_str(p, ")/");
    p = isl_printer_print_val(p, den);
  }
  isl_qpolynomial_free(qp);
  isl_val_free(den);
  return p;
}
 
__isl_give isl_printer *isl_printer_print_qpolynomial(
  __isl_take isl_printer *p, __isl_keep isl_qpolynomial *qp)
{
  if (!p || !qp)
    goto error;
 
  if (p->output_format == ISL_FORMAT_ISL)
    return print_qpolynomial_isl(p, qp);
  else if (p->output_format == ISL_FORMAT_C)
    return print_qpolynomial_c(p, qp->dim, qp);
  else
    isl_die(qp->dim->ctx, isl_error_unsupported,
      "output format not supported for isl_qpolynomials",
      goto error);
error:
  isl_printer_free(p);
  return NULL;
}
 
void isl_qpolynomial_print(__isl_keep isl_qpolynomial *qp, FILE *out,
  unsigned output_format)
{
  isl_printer *p;
 
  if  (!qp)
    return;
 
  isl_assert(qp->dim->ctx, output_format == ISL_FORMAT_ISL, return);
  p = isl_printer_to_file(qp->dim->ctx, out);
  p = isl_printer_print_qpolynomial(p, qp);
  isl_printer_free(p);
}
 
static __isl_give isl_printer *qpolynomial_fold_print(
  __isl_keep isl_qpolynomial_fold *fold, __isl_take isl_printer *p)
{
  int i;
  isl_qpolynomial_list *list;
  isl_size n;
 
  list = isl_qpolynomial_fold_peek_list(fold);
  n = isl_qpolynomial_list_size(list);
  if (n < 0)
    return isl_printer_free(p);
  if (fold->type == isl_fold_min)
    p = isl_printer_print_str(p, "min");
  else if (fold->type == isl_fold_max)
    p = isl_printer_print_str(p, "max");
  p = isl_printer_print_str(p, "(");
  for (i = 0; i < n; ++i) {
    isl_qpolynomial *qp;
 
    if (i)
      p = isl_printer_print_str(p, ", ");
    qp = isl_qpolynomial_list_peek(list, i);
    p = print_qpolynomial(p, qp);
  }
  p = isl_printer_print_str(p, ")");
  return p;
}
 
void isl_qpolynomial_fold_print(__isl_keep isl_qpolynomial_fold *fold,
  FILE *out, unsigned output_format)
{
  isl_printer *p;
 
  if (!fold)
    return;
 
  isl_assert(fold->dim->ctx, output_format == ISL_FORMAT_ISL, return);
 
  p = isl_printer_to_file(fold->dim->ctx, out);
  p = isl_printer_print_qpolynomial_fold(p, fold);
 
  isl_printer_free(p);
}
 
static __isl_give isl_printer *print_body_pw_qpolynomial(
  __isl_take isl_printer *p, __isl_keep isl_pw_qpolynomial *pwqp)
{
  struct isl_print_space_data data = { 0 };
  int i = 0;
 
  for (i = 0; i < pwqp->n; ++i) {
    isl_space *space;
 
    if (i)
      p = isl_printer_print_str(p, "; ");
    space = isl_qpolynomial_get_domain_space(pwqp->p[i].qp);
    if (!isl_space_is_params(space)) {
      p = isl_print_space(space, p, 0, &data);
      p = isl_printer_print_str(p, " -> ");
    }
    p = print_qpolynomial(p, pwqp->p[i].qp);
    p = print_disjuncts(set_to_map(pwqp->p[i].set), space, p, 0);
    isl_space_free(space);
  }
 
  return p;
}
 
static __isl_give isl_printer *print_pw_qpolynomial_isl(
  __isl_take isl_printer *p, __isl_keep isl_pw_qpolynomial *pwqp)
{
  struct isl_print_space_data data = { 0 };
 
  if (!p || !pwqp)
    goto error;
 
  p = print_param_tuple(p, pwqp->dim, &data);
  p = isl_printer_print_str(p, "{ ");
  if (pwqp->n == 0) {
    if (!isl_space_is_set(pwqp->dim)) {
      p = print_tuple(pwqp->dim, p, isl_dim_in, &data);
      p = isl_printer_print_str(p, " -> ");
    }
    p = isl_printer_print_str(p, "0");
  }
  p = print_body_pw_qpolynomial(p, pwqp);
  p = isl_printer_print_str(p, " }");
  return p;
error:
  isl_printer_free(p);
  return NULL;
}
 
void isl_pw_qpolynomial_print(__isl_keep isl_pw_qpolynomial *pwqp, FILE *out,
  unsigned output_format)
{
  isl_printer *p;
 
  if (!pwqp)
    return;
 
  p = isl_printer_to_file(pwqp->dim->ctx, out);
  p = isl_printer_set_output_format(p, output_format);
  p = isl_printer_print_pw_qpolynomial(p, pwqp);
 
  isl_printer_free(p);
}
 
static __isl_give isl_printer *print_body_pw_qpolynomial_fold(
  __isl_take isl_printer *p, __isl_keep isl_pw_qpolynomial_fold *pwf)
{
  struct isl_print_space_data data = { 0 };
  int i = 0;
 
  for (i = 0; i < pwf->n; ++i) {
    isl_space *space;
 
    if (i)
      p = isl_printer_print_str(p, "; ");
    space = isl_qpolynomial_fold_get_domain_space(pwf->p[i].fold);
    if (!isl_space_is_params(space)) {
      p = isl_print_space(space, p, 0, &data);
      p = isl_printer_print_str(p, " -> ");
    }
    p = qpolynomial_fold_print(pwf->p[i].fold, p);
    p = print_disjuncts(set_to_map(pwf->p[i].set), space, p, 0);
    isl_space_free(space);
  }
 
  return p;
}
 
static __isl_give isl_printer *print_pw_qpolynomial_fold_isl(
  __isl_take isl_printer *p, __isl_keep isl_pw_qpolynomial_fold *pwf)
{
  struct isl_print_space_data data = { 0 };
 
  p = print_param_tuple(p, pwf->dim, &data);
  p = isl_printer_print_str(p, "{ ");
  if (pwf->n == 0) {
    if (!isl_space_is_set(pwf->dim)) {
      p = print_tuple(pwf->dim, p, isl_dim_in, &data);
      p = isl_printer_print_str(p, " -> ");
    }
    p = isl_printer_print_str(p, "0");
  }
  p = print_body_pw_qpolynomial_fold(p, pwf);
  p = isl_printer_print_str(p, " }");
  return p;
}
 
static __isl_give isl_printer *print_ls_affine_c(__isl_take isl_printer *p,
  __isl_keep isl_local_space *ls, isl_int *c);
 
/* We skip the constraint if it is implied by the div expression.
 *
 * *first indicates whether this is the first constraint in the conjunction and
 * is updated if the constraint is actually printed.
 */
static __isl_give isl_printer *print_constraint_c(__isl_take isl_printer *p,
  __isl_keep isl_local_space *ls, isl_int *c, const char *op, int *first)
{
  unsigned o_div;
  isl_size n_div;
  int div;
 
  o_div = isl_local_space_offset(ls, isl_dim_div);
  n_div = isl_local_space_dim(ls, isl_dim_div);
  if (n_div < 0)
    return isl_printer_free(p);
  div = isl_seq_last_non_zero(c + o_div, n_div);
  if (div >= 0) {
    isl_bool is_div = isl_local_space_is_div_constraint(ls, c, div);
    if (is_div < 0)
      return isl_printer_free(p);
    if (is_div)
      return p;
  }
 
  if (!*first)
    p = isl_printer_print_str(p, " && ");
 
  p = print_ls_affine_c(p, ls, c);
  p = isl_printer_print_str(p, " ");
  p = isl_printer_print_str(p, op);
  p = isl_printer_print_str(p, " 0");
 
  *first = 0;
 
  return p;
}
 
static __isl_give isl_printer *print_ls_partial_affine_c(
  __isl_take isl_printer *p, __isl_keep isl_local_space *ls,
  isl_int *c, unsigned len);
 
static __isl_give isl_printer *print_basic_set_c(__isl_take isl_printer *p,
  __isl_keep isl_space *space, __isl_keep isl_basic_set *bset)
{
  int i, j;
  int first = 1;
  isl_size n_div = isl_basic_set_dim(bset, isl_dim_div);
  isl_size total = isl_basic_set_dim(bset, isl_dim_all);
  isl_mat *div;
  isl_local_space *ls;
 
  if (n_div < 0 || total < 0)
    return isl_printer_free(p);
 
  total -= n_div;
  div = isl_basic_set_get_divs(bset);
  ls = isl_local_space_alloc_div(isl_space_copy(space), div);
  for (i = 0; i < bset->n_eq; ++i) {
    j = isl_seq_last_non_zero(bset->eq[i] + 1 + total, n_div);
    if (j < 0)
      p = print_constraint_c(p, ls,
            bset->eq[i], "==", &first);
    else {
      if (i)
        p = isl_printer_print_str(p, " && ");
      p = isl_printer_print_str(p, "(");
      p = print_ls_partial_affine_c(p, ls, bset->eq[i],
               1 + total + j);
      p = isl_printer_print_str(p, ") % ");
      p = isl_printer_print_isl_int(p,
            bset->eq[i][1 + total + j]);
      p = isl_printer_print_str(p, " == 0");
      first = 0;
    }
  }
  for (i = 0; i < bset->n_ineq; ++i)
    p = print_constraint_c(p, ls, bset->ineq[i], ">=", &first);
  isl_local_space_free(ls);
  return p;
}
 
static __isl_give isl_printer *print_set_c(__isl_take isl_printer *p,
  __isl_keep isl_space *space, __isl_keep isl_set *set)
{
  int i;
 
  if (!set)
    return isl_printer_free(p);
 
  if (set->n == 0)
    p = isl_printer_print_str(p, "0");
 
  for (i = 0; i < set->n; ++i) {
    if (i)
      p = isl_printer_print_str(p, " || ");
    if (set->n > 1)
      p = isl_printer_print_str(p, "(");
    p = print_basic_set_c(p, space, set->p[i]);
    if (set->n > 1)
      p = isl_printer_print_str(p, ")");
  }
  return p;
}
 
/* Print the piecewise quasi-polynomial "pwqp" to "p" in C format.
 */
static __isl_give isl_printer *print_pw_qpolynomial_c(
  __isl_take isl_printer *p, __isl_keep isl_pw_qpolynomial *pwqp)
{
  int i;
  isl_space *space;
 
  space = isl_pw_qpolynomial_get_domain_space(pwqp);
  if (pwqp->n == 1 && isl_set_plain_is_universe(pwqp->p[0].set)) {
    p = print_qpolynomial_c(p, space, pwqp->p[0].qp);
    isl_space_free(space);
    return p;
  }
 
  for (i = 0; i < pwqp->n; ++i) {
    p = isl_printer_print_str(p, "(");
    p = print_set_c(p, space, pwqp->p[i].set);
    p = isl_printer_print_str(p, ") ? (");
    p = print_qpolynomial_c(p, space, pwqp->p[i].qp);
    p = isl_printer_print_str(p, ") : ");
  }
 
  isl_space_free(space);
  p = isl_printer_print_str(p, "0");
  return p;
}
 
__isl_give isl_printer *isl_printer_print_pw_qpolynomial(
  __isl_take isl_printer *p, __isl_keep isl_pw_qpolynomial *pwqp)
{
  if (!p || !pwqp)
    goto error;
 
  if (p->output_format == ISL_FORMAT_ISL)
    return print_pw_qpolynomial_isl(p, pwqp);
  else if (p->output_format == ISL_FORMAT_C)
    return print_pw_qpolynomial_c(p, pwqp);
  isl_assert(p->ctx, 0, goto error);
error:
  isl_printer_free(p);
  return NULL;
}
 
#undef BASE
#define BASE  pw_qpolynomial
#include "isl_union_print_templ.c"
 
__isl_give isl_printer *isl_printer_print_union_pw_qpolynomial(
  __isl_take isl_printer *p, __isl_keep isl_union_pw_qpolynomial *upwqp)
{
  if (!p || !upwqp)
    goto error;
 
  if (p->output_format == ISL_FORMAT_ISL)
    return print_union_pw_qpolynomial_isl(p, upwqp);
  isl_die(p->ctx, isl_error_invalid,
    "invalid output format for isl_union_pw_qpolynomial",
    goto error);
error:
  isl_printer_free(p);
  return NULL;
}
 
/* Print the quasi-polynomial reduction "fold" to "p" in C format,
 * with the variable names taken from the domain space "space".
 */
static __isl_give isl_printer *print_qpolynomial_fold_c(
  __isl_take isl_printer *p, __isl_keep isl_space *space,
  __isl_keep isl_qpolynomial_fold *fold)
{
  int i;
  isl_qpolynomial_list *list;
  isl_size n;
 
  list = isl_qpolynomial_fold_peek_list(fold);
  n = isl_qpolynomial_list_size(list);
  if (n < 0)
    return isl_printer_free(p);
  for (i = 0; i < n - 1; ++i)
    if (fold->type == isl_fold_min)
      p = isl_printer_print_str(p, "min(");
    else if (fold->type == isl_fold_max)
      p = isl_printer_print_str(p, "max(");
 
  for (i = 0; i < n; ++i) {
    isl_qpolynomial *qp;
 
    if (i)
      p = isl_printer_print_str(p, ", ");
    qp = isl_qpolynomial_list_peek(list, i);
    p = print_qpolynomial_c(p, space, qp);
    if (i)
      p = isl_printer_print_str(p, ")");
  }
  return p;
}
 
__isl_give isl_printer *isl_printer_print_qpolynomial_fold(
  __isl_take isl_printer *p, __isl_keep isl_qpolynomial_fold *fold)
{
  if  (!p || !fold)
    goto error;
  if (p->output_format == ISL_FORMAT_ISL)
    return qpolynomial_fold_print(fold, p);
  else if (p->output_format == ISL_FORMAT_C)
    return print_qpolynomial_fold_c(p, fold->dim, fold);
  isl_die(p->ctx, isl_error_unsupported, "unsupported output format",
    goto error);
error:
  isl_printer_free(p);
  return NULL;
}
 
/* Print the piecewise quasi-polynomial reduction "pwf" to "p" in C format.
 */
static __isl_give isl_printer *print_pw_qpolynomial_fold_c(
  __isl_take isl_printer *p, __isl_keep isl_pw_qpolynomial_fold *pwf)
{
  int i;
  isl_space *space;
 
  space = isl_pw_qpolynomial_fold_get_domain_space(pwf);
  if (pwf->n == 1 && isl_set_plain_is_universe(pwf->p[0].set)) {
    p = print_qpolynomial_fold_c(p, space, pwf->p[0].fold);
    isl_space_free(space);
    return p;
  }
 
  for (i = 0; i < pwf->n; ++i) {
    p = isl_printer_print_str(p, "(");
    p = print_set_c(p, space, pwf->p[i].set);
    p = isl_printer_print_str(p, ") ? (");
    p = print_qpolynomial_fold_c(p, space, pwf->p[i].fold);
    p = isl_printer_print_str(p, ") : ");
  }
 
  isl_space_free(space);
  p = isl_printer_print_str(p, "0");
  return p;
}
 
__isl_give isl_printer *isl_printer_print_pw_qpolynomial_fold(
  __isl_take isl_printer *p, __isl_keep isl_pw_qpolynomial_fold *pwf)
{
  if (!p || !pwf)
    goto error;
 
  if (p->output_format == ISL_FORMAT_ISL)
    return print_pw_qpolynomial_fold_isl(p, pwf);
  else if (p->output_format == ISL_FORMAT_C)
    return print_pw_qpolynomial_fold_c(p, pwf);
  isl_assert(p->ctx, 0, goto error);
error:
  isl_printer_free(p);
  return NULL;
}
 
void isl_pw_qpolynomial_fold_print(__isl_keep isl_pw_qpolynomial_fold *pwf,
  FILE *out, unsigned output_format)
{
  isl_printer *p;
 
  if (!pwf)
    return;
 
  p = isl_printer_to_file(pwf->dim->ctx, out);
  p = isl_printer_set_output_format(p, output_format);
  p = isl_printer_print_pw_qpolynomial_fold(p, pwf);
 
  isl_printer_free(p);
}
 
#undef BASE
#define BASE  pw_qpolynomial_fold
#include "isl_union_print_templ.c"
 
__isl_give isl_printer *isl_printer_print_union_pw_qpolynomial_fold(
  __isl_take isl_printer *p,
  __isl_keep isl_union_pw_qpolynomial_fold *upwf)
{
  if (!p || !upwf)
    goto error;
 
  if (p->output_format == ISL_FORMAT_ISL)
    return print_union_pw_qpolynomial_fold_isl(p, upwf);
  isl_die(p->ctx, isl_error_invalid,
    "invalid output format for isl_union_pw_qpolynomial_fold",
    goto error);
error:
  isl_printer_free(p);
  return NULL;
}
 
/* Print the isl_constraint "c" to "p".
 */
__isl_give isl_printer *isl_printer_print_constraint(__isl_take isl_printer *p,
  __isl_keep isl_constraint *c)
{
  struct isl_print_space_data data = { 0 };
  isl_local_space *ls;
  isl_space *space;
  isl_bool exists;
 
  if (!p || !c)
    goto error;
 
  ls = isl_constraint_get_local_space(c);
  if (!ls)
    return isl_printer_free(p);
  space = isl_local_space_get_space(ls);
  p = print_param_tuple(p, space, &data);
  p = isl_printer_print_str(p, "{ ");
  p = isl_print_space(space, p, 0, &data);
  p = isl_printer_print_str(p, " : ");
  exists = need_exists(p, ls->div);
  if (exists < 0)
    p = isl_printer_free(p);
  if (exists >= 0 && exists)
    p = open_exists(p, space, ls->div, 0);
  p = print_affine_of_len(space, ls->div, p, c->v->el, c->v->size);
  if (isl_constraint_is_equality(c))
    p = isl_printer_print_str(p, " = 0");
  else
    p = isl_printer_print_str(p, " >= 0");
  if (exists >= 0 && exists)
    p = isl_printer_print_str(p, s_close_exists[0]);
  p = isl_printer_print_str(p, " }");
  isl_space_free(space);
  isl_local_space_free(ls);
 
  return p;
error:
  isl_printer_free(p);
  return NULL;
}
 
static __isl_give isl_printer *isl_printer_print_space_isl(
  __isl_take isl_printer *p, __isl_keep isl_space *space)
{
  struct isl_print_space_data data = { 0 };
 
  if (!space)
    goto error;
 
  p = print_param_tuple(p, space, &data);
 
  p = isl_printer_print_str(p, "{ ");
  if (isl_space_is_params(space))
    p = isl_printer_print_str(p, s_such_that[0]);
  else
    p = isl_print_space(space, p, 0, &data);
  p = isl_printer_print_str(p, " }");
 
  return p;
error:
  isl_printer_free(p);
  return NULL;
}
 
__isl_give isl_printer *isl_printer_print_space(__isl_take isl_printer *p,
  __isl_keep isl_space *space)
{
  if (!p || !space)
    return isl_printer_free(p);
  if (p->output_format == ISL_FORMAT_ISL)
    return isl_printer_print_space_isl(p, space);
  else if (p->output_format == ISL_FORMAT_OMEGA)
    return print_omega_parameters(space, p);
 
  isl_die(isl_space_get_ctx(space), isl_error_unsupported,
    "output format not supported for space",
    return isl_printer_free(p));
}
 
__isl_give isl_printer *isl_printer_print_local_space(__isl_take isl_printer *p,
  __isl_keep isl_local_space *ls)
{
  struct isl_print_space_data data = { 0 };
  isl_size n_div;
 
  n_div = isl_local_space_dim(ls, isl_dim_div);
  if (n_div < 0)
    goto error;
 
  p = print_param_tuple(p, ls->dim, &data);
  p = isl_printer_print_str(p, "{ ");
  p = isl_print_space(ls->dim, p, 0, &data);
  if (n_div > 0) {
    p = isl_printer_print_str(p, " : ");
    p = isl_printer_print_str(p, s_open_exists[0]);
    p = print_div_list(p, ls->dim, ls->div, 0, 1);
    p = isl_printer_print_str(p, s_close_exists[0]);
  } else if (isl_space_is_params(ls->dim))
    p = isl_printer_print_str(p, s_such_that[0]);
  p = isl_printer_print_str(p, " }");
  return p;
error:
  isl_printer_free(p);
  return NULL;
}
 
/* Look for the last of the "n" integer divisions that is used in "aff" and
 * that can be printed as a modulo and
 * return the position of this integer division.
 * Return "n" if no such integer division can be found.
 * Return isl_size_error on error.
 *
 * In particular, look for an integer division that appears in "aff"
 * with a coefficient that is a multiple of the denominator
 * of the integer division.
 * That is, check if the numerator of "aff" is of the form
 *
 *  f(...) + a m floor(g/m)
 *
 * and return the position of "floor(g/m)".
 *
 * Note that, unlike print_as_modulo_pos, no check needs to be made
 * for whether the integer division can be printed, since it will
 * need to be printed as an integer division anyway if it is not printed
 * as a modulo.
 */
static isl_size last_modulo(__isl_keep isl_printer *p, __isl_keep isl_aff *aff,
  unsigned n)
{
  isl_size o_div;
  int i;
 
  if (n == 0)
    return n;
  o_div = isl_aff_domain_offset(aff, isl_dim_div);
  if (o_div < 0)
    return isl_size_error;
  for (i = n - 1; i >= 0; --i) {
    if (isl_int_is_zero(aff->v->el[1 + o_div + i]))
      continue;
    if (isl_int_is_divisible_by(aff->v->el[1 + o_div + i],
              aff->ls->div->row[i][0]))
      return i;
  }
 
  return n;
}
 
/* Print the numerator of the affine expression "aff" to "p",
 * with the variable names taken from "space".
 */
static __isl_give isl_printer *print_aff_num_base(__isl_take isl_printer *p,
  __isl_keep isl_space *space, __isl_keep isl_aff *aff)
{
  isl_size total;
 
  total = isl_aff_domain_dim(aff, isl_dim_all);
  if (total < 0)
    return isl_printer_free(p);
  p = print_affine_of_len(space, aff->ls->div, p,
        aff->v->el + 1, 1 + total);
 
  return p;
}
 
static __isl_give isl_printer *print_aff_num(__isl_take isl_printer *p,
  __isl_keep isl_space *space, __isl_keep isl_aff *aff);
 
/* Print the modulo term "c" * ("aff" mod "mod") to "p",
 * with the variable names taken from "space".
 * If "first" is set, then this is the first term of an expression.
 */
static __isl_give isl_printer *print_mod_term(__isl_take isl_printer *p,
  __isl_keep isl_space *space, __isl_keep isl_aff *aff, int first,
  __isl_take isl_val *c, __isl_keep isl_val *mod)
{
  isl_bool is_one, is_neg;
 
  is_neg = isl_val_is_neg(c);
  if (is_neg < 0)
    p = isl_printer_free(p);
  if (!first) {
    if (is_neg)
      c = isl_val_neg(c);
    p = isl_printer_print_str(p, is_neg ? " - " : " + ");
  }
  is_one = isl_val_is_one(c);
  if (is_one < 0)
    p = isl_printer_free(p);
  if (!is_one) {
    p = isl_printer_print_val(p, c);
    p = isl_printer_print_str(p, "*(");
  }
  p = isl_printer_print_str(p, "(");
  p = print_aff_num(p, space, aff);
  p = isl_printer_print_str(p, ")");
  p = isl_printer_print_str(p, " mod ");
  p = isl_printer_print_val(p, mod);
  if (!is_one)
    p = isl_printer_print_str(p, ")");
 
  isl_val_free(c);
 
  return p;
}
 
/* Print the numerator of the affine expression "aff" to "p",
 * with the variable names taken from "space",
 * given that the numerator of "aff" is of the form
 *
 *  f(...) + a m floor(g/m)
 *
 * with "floor(g/m)" the integer division at position "last".
 *
 * First replace "aff" by its numerator and rewrite it as
 *
 *  f(...) + a g - a (g mod m)
 *
 * Recursively write out (the numerator of) "f(...) + a g"
 * (which may involve other modulo expressions) and
 * then write out "- a (g mod m)".
 */
static __isl_give isl_printer *print_aff_num_mod(__isl_take isl_printer *p,
  __isl_keep isl_space *space, __isl_keep isl_aff *aff, unsigned last)
{
  isl_bool is_zero;
  isl_val *a, *m;
  isl_aff *div, *term;
 
  aff = isl_aff_copy(aff);
  aff = isl_aff_scale_val(aff, isl_aff_get_denominator_val(aff));
  a = isl_aff_get_coefficient_val(aff, isl_dim_div, last);
  aff = isl_aff_set_coefficient_si(aff, isl_dim_div, last, 0);
  div = isl_aff_get_div(aff, last);
  m = isl_aff_get_denominator_val(div);
  a = isl_val_div(a, isl_val_copy(m));
  div = isl_aff_scale_val(div, isl_val_copy(m));
  term = isl_aff_scale_val(isl_aff_copy(div), isl_val_copy(a));
  aff = isl_aff_add(aff, term);
 
  is_zero = isl_aff_plain_is_zero(aff);
  if (is_zero < 0) {
    p = isl_printer_free(p);
  } else {
    if (!is_zero)
      p = print_aff_num(p, space, aff);
    a = isl_val_neg(a);
    p = print_mod_term(p, space, div, is_zero, isl_val_copy(a), m);
  }
 
  isl_val_free(a);
  isl_val_free(m);
  isl_aff_free(aff);
  isl_aff_free(div);
 
  return p;
}
 
/* Print the numerator of the affine expression "aff" to "p",
 * with the variable names taken from "space",
 * separating out any (obvious) modulo expressions.
 *
 * In particular, look for modulo expressions in "aff",
 * separating them out if found and simply printing out "aff" otherwise.
 */
static __isl_give isl_printer *print_aff_num(__isl_take isl_printer *p,
  __isl_keep isl_space *space, __isl_keep isl_aff *aff)
{
  isl_size n_div, mod;
 
  n_div = isl_aff_dim(aff, isl_dim_div);
  if (n_div < 0)
    return isl_printer_free(p);
  mod = last_modulo(p, aff, n_div);
  if (mod < 0)
    return isl_printer_free(p);
  if (mod < n_div)
    return print_aff_num_mod(p, space, aff, mod);
  else
    return print_aff_num_base(p, space, aff);
}
 
/* Print the (potentially rational) affine expression "aff" to "p",
 * with the variable names taken from "space".
 */
static __isl_give isl_printer *print_aff_body(__isl_take isl_printer *p,
  __isl_keep isl_space *space, __isl_keep isl_aff *aff)
{
  if (isl_aff_is_nan(aff))
    return isl_printer_print_str(p, "NaN");
 
  p = isl_printer_print_str(p, "(");
  p = print_aff_num(p, space, aff);
  if (isl_int_is_one(aff->v->el[0]))
    p = isl_printer_print_str(p, ")");
  else {
    p = isl_printer_print_str(p, ")/");
    p = isl_printer_print_isl_int(p, aff->v->el[0]);
  }
 
  return p;
}
 
static __isl_give isl_printer *print_body_aff(__isl_take isl_printer *p,
  __isl_keep isl_aff *aff)
{
  struct isl_print_space_data data = { 0 };
 
  if (isl_space_is_params(aff->ls->dim))
    ;
  else {
    p = print_tuple(aff->ls->dim, p, isl_dim_set, &data);
    p = isl_printer_print_str(p, " -> ");
  }
  p = isl_printer_print_str(p, "[");
  p = print_aff_body(p, aff->ls->dim, aff);
  p = isl_printer_print_str(p, "]");
 
  return p;
}
 
static __isl_give isl_printer *print_aff_isl(__isl_take isl_printer *p,
  __isl_keep isl_aff *aff)
{
  struct isl_print_space_data data = { 0 };
 
  if (!aff)
    goto error;
 
  p = print_param_tuple(p, aff->ls->dim, &data);
  p = isl_printer_print_str(p, "{ ");
  p = print_body_aff(p, aff);
  p = isl_printer_print_str(p, " }");
  return p;
error:
  isl_printer_free(p);
  return NULL;
}
 
/* Print dimension "pos" of data->space to "p" as a zero.
 */
static __isl_give isl_printer *print_dim_zero(__isl_take isl_printer *p,
  struct isl_print_space_data *data, unsigned pos)
{
  return isl_printer_print_str(p, "0");
}
 
#undef BASE
#define BASE  aff
#include "isl_pw_print_templ.c"
 
static __isl_give isl_printer *print_ls_name_c(__isl_take isl_printer *p,
  __isl_keep isl_local_space *ls, enum isl_dim_type type, unsigned pos)
{
  if (type == isl_dim_div) {
    p = isl_printer_print_str(p, "floord(");
    p = print_ls_affine_c(p, ls, ls->div->row[pos] + 1);
    p = isl_printer_print_str(p, ", ");
    p = isl_printer_print_isl_int(p, ls->div->row[pos][0]);
    p = isl_printer_print_str(p, ")");
  } else {
    const char *name;
 
    name = isl_space_get_dim_name(ls->dim, type, pos);
    if (!name)
      name = "UNNAMED";
    p = isl_printer_print_str(p, name);
  }
  return p;
}
 
static __isl_give isl_printer *print_ls_term_c(__isl_take isl_printer *p,
  __isl_keep isl_local_space *ls, isl_int c, unsigned pos)
{
  enum isl_dim_type type;
 
  if (!p || !ls)
    return isl_printer_free(p);
 
  if (pos == 0)
    return isl_printer_print_isl_int(p, c);
 
  if (isl_int_is_one(c))
    ;
  else if (isl_int_is_negone(c))
    p = isl_printer_print_str(p, "-");
  else {
    p = isl_printer_print_isl_int(p, c);
    p = isl_printer_print_str(p, "*");
  }
  if (pos2type(ls->dim, &type, &pos) < 0)
    return isl_printer_free(p);
  p = print_ls_name_c(p, ls, type, pos);
  return p;
}
 
static __isl_give isl_printer *print_ls_partial_affine_c(
  __isl_take isl_printer *p, __isl_keep isl_local_space *ls,
  isl_int *c, unsigned len)
{
  int i;
  int first;
 
  for (i = 0, first = 1; i < len; ++i) {
    int flip = 0;
    if (isl_int_is_zero(c[i]))
      continue;
    if (!first) {
      if (isl_int_is_neg(c[i])) {
        flip = 1;
        isl_int_neg(c[i], c[i]);
        p = isl_printer_print_str(p, " - ");
      } else 
        p = isl_printer_print_str(p, " + ");
    }
    first = 0;
    p = print_ls_term_c(p, ls, c[i], i);
    if (flip)
      isl_int_neg(c[i], c[i]);
  }
  if (first)
    p = isl_printer_print_str(p, "0");
  return p;
}
 
static __isl_give isl_printer *print_ls_affine_c(__isl_take isl_printer *p,
  __isl_keep isl_local_space *ls, isl_int *c)
{
  isl_size total = isl_local_space_dim(ls, isl_dim_all);
 
  if (total < 0)
    return isl_printer_free(p);
  return print_ls_partial_affine_c(p, ls, c, 1 + total);
}
 
static __isl_give isl_printer *print_aff_c(__isl_take isl_printer *p,
  __isl_keep isl_aff *aff)
{
  isl_size total;
 
  total = isl_aff_domain_dim(aff, isl_dim_all);
  if (total < 0)
    return isl_printer_free(p);
  if (!isl_int_is_one(aff->v->el[0]))
    p = isl_printer_print_str(p, "(");
  p = print_ls_partial_affine_c(p, aff->ls, aff->v->el + 1, 1 + total);
  if (!isl_int_is_one(aff->v->el[0])) {
    p = isl_printer_print_str(p, ")/");
    p = isl_printer_print_isl_int(p, aff->v->el[0]);
  }
  return p;
}
 
/* In the C format, we cannot express that "pwaff" may be undefined
 * on parts of the domain space.  We therefore assume that the expression
 * will only be evaluated on its definition domain and compute the gist
 * of each cell with respect to this domain.
 */
static __isl_give isl_printer *print_pw_aff_c(__isl_take isl_printer *p,
  __isl_keep isl_pw_aff *pwaff)
{
  isl_set *domain;
  isl_ast_build *build;
  isl_ast_expr *expr;
 
  if (pwaff->n < 1)
    isl_die(p->ctx, isl_error_unsupported,
      "cannot print empty isl_pw_aff in C format",
      return isl_printer_free(p));
 
  domain = isl_pw_aff_domain(isl_pw_aff_copy(pwaff));
  build = isl_ast_build_from_context(domain);
  expr = isl_ast_build_expr_from_pw_aff(build, isl_pw_aff_copy(pwaff));
  p = isl_printer_print_ast_expr(p, expr);
  isl_ast_expr_free(expr);
  isl_ast_build_free(build);
 
  return p;
}
 
__isl_give isl_printer *isl_printer_print_aff(__isl_take isl_printer *p,
  __isl_keep isl_aff *aff)
{
  if (!p || !aff)
    goto error;
 
  if (p->output_format == ISL_FORMAT_ISL)
    return print_aff_isl(p, aff);
  else if (p->output_format == ISL_FORMAT_C)
    return print_aff_c(p, aff);
  isl_die(p->ctx, isl_error_unsupported, "unsupported output format",
    goto error);
error:
  isl_printer_free(p);
  return NULL;
}
 
__isl_give isl_printer *isl_printer_print_pw_aff(__isl_take isl_printer *p,
  __isl_keep isl_pw_aff *pwaff)
{
  if (!p || !pwaff)
    goto error;
 
  if (p->output_format == ISL_FORMAT_ISL)
    return print_pw_aff_isl(p, pwaff);
  else if (p->output_format == ISL_FORMAT_C)
    return print_pw_aff_c(p, pwaff);
  isl_die(p->ctx, isl_error_unsupported, "unsupported output format",
    goto error);
error:
  isl_printer_free(p);
  return NULL;
}
 
#undef BASE
#define BASE  pw_aff
#include "isl_union_print_templ.c"
 
/* Print the isl_union_pw_aff "upa" to "p".
 *
 * We currently only support an isl format.
 */
__isl_give isl_printer *isl_printer_print_union_pw_aff(
  __isl_take isl_printer *p, __isl_keep isl_union_pw_aff *upa)
{
  if (!p || !upa)
    return isl_printer_free(p);
 
  if (p->output_format == ISL_FORMAT_ISL)
    return print_union_pw_aff_isl(p, upa);
  isl_die(isl_printer_get_ctx(p), isl_error_unsupported,
    "unsupported output format", return isl_printer_free(p));
}
 
/* Print dimension "pos" of data->space to "p".
 *
 * data->user is assumed to be an isl_multi_aff.
 *
 * If the current dimension is an output dimension, then print
 * the corresponding expression.  Otherwise, print the name of the dimension.
 * Make sure to use the domain space for printing names as
 * that is the space that will be used for printing constraints (if any).
 */
static __isl_give isl_printer *print_dim_ma(__isl_take isl_printer *p,
  struct isl_print_space_data *data, unsigned pos)
{
  isl_multi_aff *ma = data->user;
  isl_space *space;
 
  space = isl_multi_aff_get_domain_space(ma);
  if (data->type == isl_dim_out) {
    p = print_aff_body(p, space, ma->u.p[pos]);
  } else {
    enum isl_dim_type type = data->type;
 
    if (type == isl_dim_in)
      type = isl_dim_set;
    p = print_name(space, p, type, pos, data->latex);
  }
  isl_space_free(space);
 
  return p;
}
 
static __isl_give isl_printer *print_body_multi_aff(__isl_take isl_printer *p,
  __isl_keep isl_multi_aff *maff)
{
  struct isl_print_space_data data = { 0 };
 
  data.print_dim = &print_dim_ma;
  data.user = maff;
  return isl_print_space(maff->space, p, 0, &data);
}
 
static __isl_give isl_printer *print_multi_aff_isl(__isl_take isl_printer *p,
  __isl_keep isl_multi_aff *maff)
{
  struct isl_print_space_data data = { 0 };
 
  if (!maff)
    goto error;
 
  p = print_param_tuple(p, maff->space, &data);
  p = isl_printer_print_str(p, "{ ");
  p = print_body_multi_aff(p, maff);
  p = isl_printer_print_str(p, " }");
  return p;
error:
  isl_printer_free(p);
  return NULL;
}
 
__isl_give isl_printer *isl_printer_print_multi_aff(__isl_take isl_printer *p,
  __isl_keep isl_multi_aff *maff)
{
  if (!p || !maff)
    goto error;
 
  if (p->output_format == ISL_FORMAT_ISL)
    return print_multi_aff_isl(p, maff);
  isl_die(p->ctx, isl_error_unsupported, "unsupported output format",
    goto error);
error:
  isl_printer_free(p);
  return NULL;
}
 
#undef BASE
#define BASE  multi_aff
#include "isl_pw_print_templ.c"
 
/* Print the unnamed, single-dimensional piecewise multi affine expression "pma"
 * to "p".
 */
static __isl_give isl_printer *print_unnamed_pw_multi_aff_c(
  __isl_take isl_printer *p, __isl_keep isl_pw_multi_aff *pma)
{
  int i;
  isl_space *space;
 
  space = isl_pw_multi_aff_get_domain_space(pma);
  for (i = 0; i < pma->n - 1; ++i) {
    p = isl_printer_print_str(p, "(");
    p = print_set_c(p, space, pma->p[i].set);
    p = isl_printer_print_str(p, ") ? (");
    p = print_aff_c(p, pma->p[i].maff->u.p[0]);
    p = isl_printer_print_str(p, ") : ");
  }
  isl_space_free(space);
 
  return print_aff_c(p, pma->p[pma->n - 1].maff->u.p[0]);
}
 
static __isl_give isl_printer *print_pw_multi_aff_c(__isl_take isl_printer *p,
  __isl_keep isl_pw_multi_aff *pma)
{
  isl_size n;
  const char *name;
 
  if (!pma)
    goto error;
  if (pma->n < 1)
    isl_die(p->ctx, isl_error_unsupported,
      "cannot print empty isl_pw_multi_aff in C format",
      goto error);
  n = isl_pw_multi_aff_dim(pma, isl_dim_out);
  if (n < 0)
    return isl_printer_free(p);
  name = isl_pw_multi_aff_get_tuple_name(pma, isl_dim_out);
  if (!name && n == 1)
    return print_unnamed_pw_multi_aff_c(p, pma);
  if (!name)
    isl_die(p->ctx, isl_error_unsupported,
      "cannot print unnamed isl_pw_multi_aff in C format",
      goto error);
 
  p = isl_printer_print_str(p, name);
  if (n != 0)
    isl_die(p->ctx, isl_error_unsupported,
      "not supported yet", goto error);
 
  return p;
error:
  isl_printer_free(p);
  return NULL;
}
 
__isl_give isl_printer *isl_printer_print_pw_multi_aff(
  __isl_take isl_printer *p, __isl_keep isl_pw_multi_aff *pma)
{
  if (!p || !pma)
    goto error;
 
  if (p->output_format == ISL_FORMAT_ISL)
    return print_pw_multi_aff_isl(p, pma);
  if (p->output_format == ISL_FORMAT_C)
    return print_pw_multi_aff_c(p, pma);
  isl_die(p->ctx, isl_error_unsupported, "unsupported output format",
    goto error);
error:
  isl_printer_free(p);
  return NULL;
}
 
#undef BASE
#define BASE  pw_multi_aff
#include "isl_union_print_templ.c"
 
__isl_give isl_printer *isl_printer_print_union_pw_multi_aff(
  __isl_take isl_printer *p, __isl_keep isl_union_pw_multi_aff *upma)
{
  if (!p || !upma)
    goto error;
 
  if (p->output_format == ISL_FORMAT_ISL)
    return print_union_pw_multi_aff_isl(p, upma);
  isl_die(p->ctx, isl_error_unsupported, "unsupported output format",
    goto error);
error:
  isl_printer_free(p);
  return NULL;
}
 
/* Print dimension "pos" of data->space to "p".
 *
 * data->user is assumed to be an isl_multi_pw_aff.
 *
 * If the current dimension is an output dimension, then print
 * the corresponding piecewise affine expression.
 * Otherwise, print the name of the dimension.
 * Make sure to use the same space in both cases.
 * In particular, use the domain space for printing names as
 * that is the space that is used for printing constraints.
 */
static __isl_give isl_printer *print_dim_mpa(__isl_take isl_printer *p,
  struct isl_print_space_data *data, unsigned pos)
{
  int i;
  int need_parens;
  isl_space *space;
  isl_multi_pw_aff *mpa = data->user;
  isl_pw_aff *pa;
 
  if (data->type != isl_dim_out) {
    enum isl_dim_type type = data->type;
 
    if (type == isl_dim_in)
      type = isl_dim_set;
    space = isl_multi_pw_aff_get_domain_space(mpa);
    p = print_name(space, p, type, pos, data->latex);
    isl_space_free(space);
    return p;
  }
 
  pa = mpa->u.p[pos];
  if (pa->n == 0)
    return isl_printer_print_str(p, "(0 : false)");
 
  need_parens = pa->n != 1 || !isl_set_plain_is_universe(pa->p[0].set);
  if (need_parens)
    p = isl_printer_print_str(p, "(");
  space = isl_multi_pw_aff_get_domain_space(mpa);
  for (i = 0; i < pa->n; ++i) {
 
    if (i)
      p = isl_printer_print_str(p, "; ");
    p = print_aff_body(p, space, pa->p[i].aff);
    p = print_disjuncts(pa->p[i].set, space, p, 0);
  }
  isl_space_free(space);
  if (need_parens)
    p = isl_printer_print_str(p, ")");
 
  return p;
}
 
/* Print "mpa" to "p" in isl format.
 *
 * If "mpa" is zero-dimensional and has a non-trivial explicit domain,
 * then it is printed after the tuple of affine expressions.
 */
static __isl_give isl_printer *print_multi_pw_aff_isl(__isl_take isl_printer *p,
  __isl_keep isl_multi_pw_aff *mpa)
{
  struct isl_print_space_data data = { 0 };
  isl_bool has_domain;
 
  if (!mpa)
    return isl_printer_free(p);
 
  p = print_param_tuple(p, mpa->space, &data);
  p = isl_printer_print_str(p, "{ ");
  data.print_dim = &print_dim_mpa;
  data.user = mpa;
  p = isl_print_space(mpa->space, p, 0, &data);
  has_domain = isl_multi_pw_aff_has_non_trivial_domain(mpa);
  if (has_domain < 0)
    return isl_printer_free(p);
  if (has_domain) {
    isl_space *space;
 
    space = isl_space_domain(isl_space_copy(mpa->space));
    p = print_disjuncts_set(mpa->u.dom, space, p, 0);
    isl_space_free(space);
  }
  p = isl_printer_print_str(p, " }");
  return p;
}
 
__isl_give isl_printer *isl_printer_print_multi_pw_aff(
  __isl_take isl_printer *p, __isl_keep isl_multi_pw_aff *mpa)
{
  if (!p || !mpa)
    return isl_printer_free(p);
 
  if (p->output_format == ISL_FORMAT_ISL)
    return print_multi_pw_aff_isl(p, mpa);
  isl_die(p->ctx, isl_error_unsupported, "unsupported output format",
    return isl_printer_free(p));
}
 
/* Print dimension "pos" of data->space to "p".
 *
 * data->user is assumed to be an isl_multi_val.
 *
 * If the current dimension is an output dimension, then print
 * the corresponding value.  Otherwise, print the name of the dimension.
 */
static __isl_give isl_printer *print_dim_mv(__isl_take isl_printer *p,
  struct isl_print_space_data *data, unsigned pos)
{
  isl_multi_val *mv = data->user;
 
  if (data->type == isl_dim_out)
    return isl_printer_print_val(p, mv->u.p[pos]);
  else
    return print_name(data->space, p, data->type, pos, data->latex);
}
 
/* Print the isl_multi_val "mv" to "p" in isl format.
 */
static __isl_give isl_printer *print_multi_val_isl(__isl_take isl_printer *p,
  __isl_keep isl_multi_val *mv)
{
  struct isl_print_space_data data = { 0 };
 
  if (!mv)
    return isl_printer_free(p);
 
  p = print_param_tuple(p, mv->space, &data);
  p = isl_printer_print_str(p, "{ ");
  data.print_dim = &print_dim_mv;
  data.user = mv;
  p = isl_print_space(mv->space, p, 0, &data);
  p = isl_printer_print_str(p, " }");
  return p;
}
 
/* Print the isl_multi_val "mv" to "p".
 *
 * Currently only supported in isl format.
 */
__isl_give isl_printer *isl_printer_print_multi_val(
  __isl_take isl_printer *p, __isl_keep isl_multi_val *mv)
{
  if (!p || !mv)
    return isl_printer_free(p);
 
  if (p->output_format == ISL_FORMAT_ISL)
    return print_multi_val_isl(p, mv);
  isl_die(p->ctx, isl_error_unsupported, "unsupported output format",
    return isl_printer_free(p));
}
 
/* Print dimension "pos" of data->space to "p".
 *
 * data->user is assumed to be an isl_multi_id.
 *
 * If the current dimension is an output dimension, then print
 * the corresponding identifier.  Otherwise, print the name of the dimension.
 */
static __isl_give isl_printer *print_dim_mi(__isl_take isl_printer *p,
  struct isl_print_space_data *data, unsigned pos)
{
  isl_multi_id *mi = data->user;
 
  if (data->type == isl_dim_out)
    return isl_printer_print_id(p, mi->u.p[pos]);
  else
    return print_name(data->space, p, data->type, pos, data->latex);
}
 
/* Print the isl_multi_id "mi" to "p" in isl format.
 */
static __isl_give isl_printer *print_multi_id_isl(__isl_take isl_printer *p,
  __isl_keep isl_multi_id *mi)
{
  isl_space *space;
  struct isl_print_space_data data = { 0 };
 
  space = isl_multi_id_peek_space(mi);
  p = print_param_tuple(p, space, &data);
  p = isl_printer_print_str(p, "{ ");
  data.print_dim = &print_dim_mi;
  data.user = mi;
  p = isl_print_space(space, p, 0, &data);
  p = isl_printer_print_str(p, " }");
  return p;
}
 
/* Print the isl_multi_id "mi" to "p".
 *
 * Currently only supported in isl format.
 */
__isl_give isl_printer *isl_printer_print_multi_id(
  __isl_take isl_printer *p, __isl_keep isl_multi_id *mi)
{
  if (!p || !mi)
    return isl_printer_free(p);
 
  if (p->output_format == ISL_FORMAT_ISL)
    return print_multi_id_isl(p, mi);
  isl_die(isl_printer_get_ctx(p), isl_error_unsupported,
    "unsupported output format", return isl_printer_free(p));
}
 
/* Print dimension "pos" of data->space to "p".
 *
 * data->user is assumed to be an isl_multi_union_pw_aff.
 *
 * The current dimension is necessarily a set dimension, so
 * we print the corresponding isl_union_pw_aff, including
 * the braces.
 */
static __isl_give isl_printer *print_union_pw_aff_dim(__isl_take isl_printer *p,
  struct isl_print_space_data *data, unsigned pos)
{
  isl_multi_union_pw_aff *mupa = data->user;
  isl_union_pw_aff *upa;
 
  upa = isl_multi_union_pw_aff_get_union_pw_aff(mupa, pos);
  p = print_body_union_pw_aff(p, upa);
  isl_union_pw_aff_free(upa);
 
  return p;
}
 
/* Print the isl_multi_union_pw_aff "mupa" to "p" in isl format.
 *
 * If "mupa" is zero-dimensional and has a non-trivial explicit domain,
 * then it is printed after the tuple of affine expressions.
 * In order to clarify that this domain belongs to the expression,
 * the tuple along with the domain are placed inside parentheses.
 * If "mupa" has any parameters, then the opening parenthesis
 * appears after the parameter declarations.
 */
static __isl_give isl_printer *print_multi_union_pw_aff_isl(
  __isl_take isl_printer *p, __isl_keep isl_multi_union_pw_aff *mupa)
{
  struct isl_print_space_data data = { 0 };
  isl_bool has_domain;
  isl_space *space;
 
  if (!mupa)
    return isl_printer_free(p);
  has_domain = isl_multi_union_pw_aff_has_non_trivial_domain(mupa);
  if (has_domain < 0)
    return isl_printer_free(p);
 
  space = isl_multi_union_pw_aff_get_space(mupa);
  p = print_param_tuple(p, space, &data);
 
  if (has_domain)
    p = isl_printer_print_str(p, "(");
 
  data.print_dim = &print_union_pw_aff_dim;
  data.user = mupa;
 
  p = isl_print_space(space, p, 0, &data);
  isl_space_free(space);
 
  if (has_domain) {
    p = isl_printer_print_str(p, " : ");
    p = isl_printer_print_union_set_isl_body(p, mupa->u.dom);
    p = isl_printer_print_str(p, ")");
  }
 
  return p;
}
 
/* Print the isl_multi_union_pw_aff "mupa" to "p" in isl format.
 *
 * We currently only support an isl format.
 */
__isl_give isl_printer *isl_printer_print_multi_union_pw_aff(
  __isl_take isl_printer *p, __isl_keep isl_multi_union_pw_aff *mupa)
{
  if (!p || !mupa)
    return isl_printer_free(p);
 
  if (p->output_format == ISL_FORMAT_ISL)
    return print_multi_union_pw_aff_isl(p, mupa);
  isl_die(isl_printer_get_ctx(p), isl_error_unsupported,
    "unsupported output format", return isl_printer_free(p));
}