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/* glpmpl02.c */
/***********************************************************************
* This code is part of GLPK (GNU Linear Programming Kit).
*
* Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
* 2009, 2010 Andrew Makhorin, Department for Applied Informatics,
* Moscow Aviation Institute, Moscow, Russia. All rights reserved.
* E-mail: <mao@gnu.org>.
*
* GLPK is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GLPK is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
* License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GLPK. If not, see <http://www.gnu.org/licenses/>.
***********************************************************************/
#define _GLPSTD_STDIO
#include "glpenv.h"
#include "glpmpl.h"
/**********************************************************************/
/* * * PROCESSING DATA SECTION * * */
/**********************************************************************/
/*----------------------------------------------------------------------
-- create_slice - create slice.
--
-- This routine creates a slice, which initially has no components. */
SLICE *create_slice(MPL *mpl)
{ SLICE *slice;
xassert(mpl == mpl);
slice = NULL;
return slice;
}
/*----------------------------------------------------------------------
-- expand_slice - append new component to slice.
--
-- This routine expands slice appending to it either a given symbol or
-- null component, which becomes the last component of the slice. */
SLICE *expand_slice
( MPL *mpl,
SLICE *slice, /* destroyed */
SYMBOL *sym /* destroyed */
)
{ SLICE *tail, *temp;
/* create a new component */
tail = dmp_get_atom(mpl->tuples, sizeof(SLICE));
tail->sym = sym;
tail->next = NULL;
/* and append it to the component list */
if (slice == NULL)
slice = tail;
else
{ for (temp = slice; temp->next != NULL; temp = temp->next);
temp->next = tail;
}
return slice;
}
/*----------------------------------------------------------------------
-- slice_dimen - determine dimension of slice.
--
-- This routine returns dimension of slice, which is number of all its
-- components including null ones. */
int slice_dimen
( MPL *mpl,
SLICE *slice /* not changed */
)
{ SLICE *temp;
int dim;
xassert(mpl == mpl);
dim = 0;
for (temp = slice; temp != NULL; temp = temp->next) dim++;
return dim;
}
/*----------------------------------------------------------------------
-- slice_arity - determine arity of slice.
--
-- This routine returns arity of slice, i.e. number of null components
-- (indicated by asterisks) in the slice. */
int slice_arity
( MPL *mpl,
SLICE *slice /* not changed */
)
{ SLICE *temp;
int arity;
xassert(mpl == mpl);
arity = 0;
for (temp = slice; temp != NULL; temp = temp->next)
if (temp->sym == NULL) arity++;
return arity;
}
/*----------------------------------------------------------------------
-- fake_slice - create fake slice of all asterisks.
--
-- This routine creates a fake slice of given dimension, which contains
-- asterisks in all components. Zero dimension is allowed. */
SLICE *fake_slice(MPL *mpl, int dim)
{ SLICE *slice;
slice = create_slice(mpl);
while (dim-- > 0) slice = expand_slice(mpl, slice, NULL);
return slice;
}
/*----------------------------------------------------------------------
-- delete_slice - delete slice.
--
-- This routine deletes specified slice. */
void delete_slice
( MPL *mpl,
SLICE *slice /* destroyed */
)
{ SLICE *temp;
while (slice != NULL)
{ temp = slice;
slice = temp->next;
if (temp->sym != NULL) delete_symbol(mpl, temp->sym);
xassert(sizeof(SLICE) == sizeof(TUPLE));
dmp_free_atom(mpl->tuples, temp, sizeof(TUPLE));
}
return;
}
/*----------------------------------------------------------------------
-- is_number - check if current token is number.
--
-- If the current token is a number, this routine returns non-zero.
-- Otherwise zero is returned. */
int is_number(MPL *mpl)
{ return
mpl->token == T_NUMBER;
}
/*----------------------------------------------------------------------
-- is_symbol - check if current token is symbol.
--
-- If the current token is suitable to be a symbol, the routine returns
-- non-zero. Otherwise zero is returned. */
int is_symbol(MPL *mpl)
{ return
mpl->token == T_NUMBER ||
mpl->token == T_SYMBOL ||
mpl->token == T_STRING;
}
/*----------------------------------------------------------------------
-- is_literal - check if current token is given symbolic literal.
--
-- If the current token is given symbolic literal, this routine returns
-- non-zero. Otherwise zero is returned.
--
-- This routine is used on processing the data section in the same way
-- as the routine is_keyword on processing the model section. */
int is_literal(MPL *mpl, char *literal)
{ return
is_symbol(mpl) && strcmp(mpl->image, literal) == 0;
}
/*----------------------------------------------------------------------
-- read_number - read number.
--
-- This routine reads the current token, which must be a number, and
-- returns its numeric value. */
double read_number(MPL *mpl)
{ double num;
xassert(is_number(mpl));
num = mpl->value;
get_token(mpl /* <number> */);
return num;
}
/*----------------------------------------------------------------------
-- read_symbol - read symbol.
--
-- This routine reads the current token, which must be a symbol, and
-- returns its symbolic value. */
SYMBOL *read_symbol(MPL *mpl)
{ SYMBOL *sym;
xassert(is_symbol(mpl));
if (is_number(mpl))
sym = create_symbol_num(mpl, mpl->value);
else
sym = create_symbol_str(mpl, create_string(mpl, mpl->image));
get_token(mpl /* <symbol> */);
return sym;
}
/*----------------------------------------------------------------------
-- read_slice - read slice.
--
-- This routine reads slice using the syntax:
--
-- <slice> ::= [ <symbol list> ]
-- <slice> ::= ( <symbol list> )
-- <symbol list> ::= <symbol or star>
-- <symbol list> ::= <symbol list> , <symbol or star>
-- <symbol or star> ::= <symbol>
-- <symbol or star> ::= *
--
-- The bracketed form of slice is used for members of multi-dimensional
-- objects while the parenthesized form is used for elemental sets. */
SLICE *read_slice
( MPL *mpl,
char *name, /* not changed */
int dim
)
{ SLICE *slice;
int close;
xassert(name != NULL);
switch (mpl->token)
{ case T_LBRACKET:
close = T_RBRACKET;
break;
case T_LEFT:
xassert(dim > 0);
close = T_RIGHT;
break;
default:
xassert(mpl != mpl);
}
if (dim == 0)
error(mpl, "%s cannot be subscripted", name);
get_token(mpl /* ( | [ */);
/* read slice components */
slice = create_slice(mpl);
for (;;)
{ /* the current token must be a symbol or asterisk */
if (is_symbol(mpl))
slice = expand_slice(mpl, slice, read_symbol(mpl));
else if (mpl->token == T_ASTERISK)
{ slice = expand_slice(mpl, slice, NULL);
get_token(mpl /* * */);
}
else
error(mpl, "number, symbol, or asterisk missing where expec"
"ted");
/* check a token that follows the symbol */
if (mpl->token == T_COMMA)
get_token(mpl /* , */);
else if (mpl->token == close)
break;
else
error(mpl, "syntax error in slice");
}
/* number of slice components must be the same as the appropriate
dimension */
if (slice_dimen(mpl, slice) != dim)
{ switch (close)
{ case T_RBRACKET:
error(mpl, "%s must have %d subscript%s, not %d", name,
dim, dim == 1 ? "" : "s", slice_dimen(mpl, slice));
break;
case T_RIGHT:
error(mpl, "%s has dimension %d, not %d", name, dim,
slice_dimen(mpl, slice));
break;
default:
xassert(close != close);
}
}
get_token(mpl /* ) | ] */);
return slice;
}
/*----------------------------------------------------------------------
-- select_set - select set to saturate it with elemental sets.
--
-- This routine selects set to saturate it with elemental sets provided
-- in the data section. */
SET *select_set
( MPL *mpl,
char *name /* not changed */
)
{ SET *set;
AVLNODE *node;
xassert(name != NULL);
node = avl_find_node(mpl->tree, name);
if (node == NULL || avl_get_node_type(node) != A_SET)
error(mpl, "%s not a set", name);
set = (SET *)avl_get_node_link(node);
if (set->assign != NULL || set->gadget != NULL)
error(mpl, "%s needs no data", name);
set->data = 1;
return set;
}
/*----------------------------------------------------------------------
-- simple_format - read set data block in simple format.
--
-- This routine reads set data block using the syntax:
--
-- <simple format> ::= <symbol> , <symbol> , ... , <symbol>
--
-- where <symbols> are used to construct a complete n-tuple, which is
-- included in elemental set assigned to the set member. Commae between
-- symbols are optional and may be omitted anywhere.
--
-- Number of components in the slice must be the same as dimension of
-- n-tuples in elemental sets assigned to the set members. To construct
-- complete n-tuple the routine replaces null positions in the slice by
-- corresponding <symbols>.
--
-- If the slice contains at least one null position, the current token
-- must be symbol. Otherwise, the routine reads no symbols to construct
-- the n-tuple, so the current token is not checked. */
void simple_format
( MPL *mpl,
SET *set, /* not changed */
MEMBER *memb, /* modified */
SLICE *slice /* not changed */
)
{ TUPLE *tuple;
SLICE *temp;
SYMBOL *sym, *with = NULL;
xassert(set != NULL);
xassert(memb != NULL);
xassert(slice != NULL);
xassert(set->dimen == slice_dimen(mpl, slice));
xassert(memb->value.set->dim == set->dimen);
if (slice_arity(mpl, slice) > 0) xassert(is_symbol(mpl));
/* read symbols and construct complete n-tuple */
tuple = create_tuple(mpl);
for (temp = slice; temp != NULL; temp = temp->next)
{ if (temp->sym == NULL)
{ /* substitution is needed; read symbol */
if (!is_symbol(mpl))
{ int lack = slice_arity(mpl, temp);
/* with cannot be null due to assertion above */
xassert(with != NULL);
if (lack == 1)
error(mpl, "one item missing in data group beginning "
"with %s", format_symbol(mpl, with));
else
error(mpl, "%d items missing in data group beginning "
"with %s", lack, format_symbol(mpl, with));
}
sym = read_symbol(mpl);
if (with == NULL) with = sym;
}
else
{ /* copy symbol from the slice */
sym = copy_symbol(mpl, temp->sym);
}
/* append the symbol to the n-tuple */
tuple = expand_tuple(mpl, tuple, sym);
/* skip optional comma *between* <symbols> */
if (temp->next != NULL && mpl->token == T_COMMA)
get_token(mpl /* , */);
}
/* add constructed n-tuple to elemental set */
check_then_add(mpl, memb->value.set, tuple);
return;
}
/*----------------------------------------------------------------------
-- matrix_format - read set data block in matrix format.
--
-- This routine reads set data block using the syntax:
--
-- <matrix format> ::= <column> <column> ... <column> :=
-- <row> +/- +/- ... +/-
-- <row> +/- +/- ... +/-
-- . . . . . . . . . . .
-- <row> +/- +/- ... +/-
--
-- where <rows> are symbols that denote rows of the matrix, <columns>
-- are symbols that denote columns of the matrix, "+" and "-" indicate
-- whether corresponding n-tuple needs to be included in the elemental
-- set or not, respectively.
--
-- Number of the slice components must be the same as dimension of the
-- elemental set. The slice must have two null positions. To construct
-- complete n-tuple for particular element of the matrix the routine
-- replaces first null position of the slice by the corresponding <row>
-- (or <column>, if the flag tr is on) and second null position by the
-- corresponding <column> (or by <row>, if the flag tr is on). */
void matrix_format
( MPL *mpl,
SET *set, /* not changed */
MEMBER *memb, /* modified */
SLICE *slice, /* not changed */
int tr
)
{ SLICE *list, *col, *temp;
TUPLE *tuple;
SYMBOL *row;
xassert(set != NULL);
xassert(memb != NULL);
xassert(slice != NULL);
xassert(set->dimen == slice_dimen(mpl, slice));
xassert(memb->value.set->dim == set->dimen);
xassert(slice_arity(mpl, slice) == 2);
/* read the matrix heading that contains column symbols (there
may be no columns at all) */
list = create_slice(mpl);
while (mpl->token != T_ASSIGN)
{ /* read column symbol and append it to the column list */
if (!is_symbol(mpl))
error(mpl, "number, symbol, or := missing where expected");
list = expand_slice(mpl, list, read_symbol(mpl));
}
get_token(mpl /* := */);
/* read zero or more rows that contain matrix data */
while (is_symbol(mpl))
{ /* read row symbol (if the matrix has no columns, row symbols
are just ignored) */
row = read_symbol(mpl);
/* read the matrix row accordingly to the column list */
for (col = list; col != NULL; col = col->next)
{ int which = 0;
/* check indicator */
if (is_literal(mpl, "+"))
;
else if (is_literal(mpl, "-"))
{ get_token(mpl /* - */);
continue;
}
else
{ int lack = slice_dimen(mpl, col);
if (lack == 1)
error(mpl, "one item missing in data group beginning "
"with %s", format_symbol(mpl, row));
else
error(mpl, "%d items missing in data group beginning "
"with %s", lack, format_symbol(mpl, row));
}
/* construct complete n-tuple */
tuple = create_tuple(mpl);
for (temp = slice; temp != NULL; temp = temp->next)
{ if (temp->sym == NULL)
{ /* substitution is needed */
switch (++which)
{ case 1:
/* substitute in the first null position */
tuple = expand_tuple(mpl, tuple,
copy_symbol(mpl, tr ? col->sym : row));
break;
case 2:
/* substitute in the second null position */
tuple = expand_tuple(mpl, tuple,
copy_symbol(mpl, tr ? row : col->sym));
break;
default:
xassert(which != which);
}
}
else
{ /* copy symbol from the slice */
tuple = expand_tuple(mpl, tuple, copy_symbol(mpl,
temp->sym));
}
}
xassert(which == 2);
/* add constructed n-tuple to elemental set */
check_then_add(mpl, memb->value.set, tuple);
get_token(mpl /* + */);
}
/* delete the row symbol */
delete_symbol(mpl, row);
}
/* delete the column list */
delete_slice(mpl, list);
return;
}
/*----------------------------------------------------------------------
-- set_data - read set data.
--
-- This routine reads set data using the syntax:
--
-- <set data> ::= set <set name> <assignments> ;
-- <set data> ::= set <set name> [ <symbol list> ] <assignments> ;
-- <set name> ::= <symbolic name>
-- <assignments> ::= <empty>
-- <assignments> ::= <assignments> , :=
-- <assignments> ::= <assignments> , ( <symbol list> )
-- <assignments> ::= <assignments> , <simple format>
-- <assignments> ::= <assignments> , : <matrix format>
-- <assignments> ::= <assignments> , (tr) <matrix format>
-- <assignments> ::= <assignments> , (tr) : <matrix format>
--
-- Commae in <assignments> are optional and may be omitted anywhere. */
void set_data(MPL *mpl)
{ SET *set;
TUPLE *tuple;
MEMBER *memb;
SLICE *slice;
int tr = 0;
xassert(is_literal(mpl, "set"));
get_token(mpl /* set */);
/* symbolic name of set must follows the keyword 'set' */
if (!is_symbol(mpl))
error(mpl, "set name missing where expected");
/* select the set to saturate it with data */
set = select_set(mpl, mpl->image);
get_token(mpl /* <symbolic name> */);
/* read optional subscript list, which identifies member of the
set to be read */
tuple = create_tuple(mpl);
if (mpl->token == T_LBRACKET)
{ /* subscript list is specified */
if (set->dim == 0)
error(mpl, "%s cannot be subscripted", set->name);
get_token(mpl /* [ */);
/* read symbols and construct subscript list */
for (;;)
{ if (!is_symbol(mpl))
error(mpl, "number or symbol missing where expected");
tuple = expand_tuple(mpl, tuple, read_symbol(mpl));
if (mpl->token == T_COMMA)
get_token(mpl /* , */);
else if (mpl->token == T_RBRACKET)
break;
else
error(mpl, "syntax error in subscript list");
}
if (set->dim != tuple_dimen(mpl, tuple))
error(mpl, "%s must have %d subscript%s rather than %d",
set->name, set->dim, set->dim == 1 ? "" : "s",
tuple_dimen(mpl, tuple));
get_token(mpl /* ] */);
}
else
{ /* subscript list is not specified */
if (set->dim != 0)
error(mpl, "%s must be subscripted", set->name);
}
/* there must be no member with the same subscript list */
if (find_member(mpl, set->array, tuple) != NULL)
error(mpl, "%s%s already defined",
set->name, format_tuple(mpl, '[', tuple));
/* add new member to the set and assign it empty elemental set */
memb = add_member(mpl, set->array, tuple);
memb->value.set = create_elemset(mpl, set->dimen);
/* create an initial fake slice of all asterisks */
slice = fake_slice(mpl, set->dimen);
/* read zero or more data assignments */
for (;;)
{ /* skip optional comma */
if (mpl->token == T_COMMA) get_token(mpl /* , */);
/* process assignment element */
if (mpl->token == T_ASSIGN)
{ /* assignment ligature is non-significant element */
get_token(mpl /* := */);
}
else if (mpl->token == T_LEFT)
{ /* left parenthesis begins either new slice or "transpose"
indicator */
int is_tr;
get_token(mpl /* ( */);
is_tr = is_literal(mpl, "tr");
unget_token(mpl /* ( */);
if (is_tr) goto left;
/* delete the current slice and read new one */
delete_slice(mpl, slice);
slice = read_slice(mpl, set->name, set->dimen);
/* each new slice resets the "transpose" indicator */
tr = 0;
/* if the new slice is 0-ary, formally there is one 0-tuple
(in the simple format) that follows it */
if (slice_arity(mpl, slice) == 0)
simple_format(mpl, set, memb, slice);
}
else if (is_symbol(mpl))
{ /* number or symbol begins data in the simple format */
simple_format(mpl, set, memb, slice);
}
else if (mpl->token == T_COLON)
{ /* colon begins data in the matrix format */
if (slice_arity(mpl, slice) != 2)
err1: error(mpl, "slice currently used must specify 2 asterisk"
"s, not %d", slice_arity(mpl, slice));
get_token(mpl /* : */);
/* read elemental set data in the matrix format */
matrix_format(mpl, set, memb, slice, tr);
}
else if (mpl->token == T_LEFT)
left: { /* left parenthesis begins the "transpose" indicator, which
is followed by data in the matrix format */
get_token(mpl /* ( */);
if (!is_literal(mpl, "tr"))
err2: error(mpl, "transpose indicator (tr) incomplete");
if (slice_arity(mpl, slice) != 2) goto err1;
get_token(mpl /* tr */);
if (mpl->token != T_RIGHT) goto err2;
get_token(mpl /* ) */);
/* in this case the colon is optional */
if (mpl->token == T_COLON) get_token(mpl /* : */);
/* set the "transpose" indicator */
tr = 1;
/* read elemental set data in the matrix format */
matrix_format(mpl, set, memb, slice, tr);
}
else if (mpl->token == T_SEMICOLON)
{ /* semicolon terminates the data block */
get_token(mpl /* ; */);
break;
}
else
error(mpl, "syntax error in set data block");
}
/* delete the current slice */
delete_slice(mpl, slice);
return;
}
/*----------------------------------------------------------------------
-- select_parameter - select parameter to saturate it with data.
--
-- This routine selects parameter to saturate it with data provided in
-- the data section. */
PARAMETER *select_parameter
( MPL *mpl,
char *name /* not changed */
)
{ PARAMETER *par;
AVLNODE *node;
xassert(name != NULL);
node = avl_find_node(mpl->tree, name);
if (node == NULL || avl_get_node_type(node) != A_PARAMETER)
error(mpl, "%s not a parameter", name);
par = (PARAMETER *)avl_get_node_link(node);
if (par->assign != NULL)
error(mpl, "%s needs no data", name);
if (par->data)
error(mpl, "%s already provided with data", name);
par->data = 1;
return par;
}
/*----------------------------------------------------------------------
-- set_default - set default parameter value.
--
-- This routine sets default value for specified parameter. */
void set_default
( MPL *mpl,
PARAMETER *par, /* not changed */
SYMBOL *altval /* destroyed */
)
{ xassert(par != NULL);
xassert(altval != NULL);
if (par->option != NULL)
error(mpl, "default value for %s already specified in model se"
"ction", par->name);
xassert(par->defval == NULL);
par->defval = altval;
return;
}
/*----------------------------------------------------------------------
-- read_value - read value and assign it to parameter member.
--
-- This routine reads numeric or symbolic value from the input stream
-- and assigns to new parameter member specified by its n-tuple, which
-- (the member) is created and added to the parameter array. */
MEMBER *read_value
( MPL *mpl,
PARAMETER *par, /* not changed */
TUPLE *tuple /* destroyed */
)
{ MEMBER *memb;
xassert(par != NULL);
xassert(is_symbol(mpl));
/* there must be no member with the same n-tuple */
if (find_member(mpl, par->array, tuple) != NULL)
error(mpl, "%s%s already defined",
par->name, format_tuple(mpl, '[', tuple));
/* create new parameter member with given n-tuple */
memb = add_member(mpl, par->array, tuple);
/* read value and assigns it to the new parameter member */
switch (par->type)
{ case A_NUMERIC:
case A_INTEGER:
case A_BINARY:
if (!is_number(mpl))
error(mpl, "%s requires numeric data", par->name);
memb->value.num = read_number(mpl);
break;
case A_SYMBOLIC:
memb->value.sym = read_symbol(mpl);
break;
default:
xassert(par != par);
}
return memb;
}
/*----------------------------------------------------------------------
-- plain_format - read parameter data block in plain format.
--
-- This routine reads parameter data block using the syntax:
--
-- <plain format> ::= <symbol> , <symbol> , ... , <symbol> , <value>
--
-- where <symbols> are used to determine a complete subscript list for
-- parameter member, <value> is a numeric or symbolic value assigned to
-- the parameter member. Commae between data items are optional and may
-- be omitted anywhere.
--
-- Number of components in the slice must be the same as dimension of
-- the parameter. To construct the complete subscript list the routine
-- replaces null positions in the slice by corresponding <symbols>. */
void plain_format
( MPL *mpl,
PARAMETER *par, /* not changed */
SLICE *slice /* not changed */
)
{ TUPLE *tuple;
SLICE *temp;
SYMBOL *sym, *with = NULL;
xassert(par != NULL);
xassert(par->dim == slice_dimen(mpl, slice));
xassert(is_symbol(mpl));
/* read symbols and construct complete subscript list */
tuple = create_tuple(mpl);
for (temp = slice; temp != NULL; temp = temp->next)
{ if (temp->sym == NULL)
{ /* substitution is needed; read symbol */
if (!is_symbol(mpl))
{ int lack = slice_arity(mpl, temp) + 1;
xassert(with != NULL);
xassert(lack > 1);
error(mpl, "%d items missing in data group beginning wit"
"h %s", lack, format_symbol(mpl, with));
}
sym = read_symbol(mpl);
if (with == NULL) with = sym;
}
else
{ /* copy symbol from the slice */
sym = copy_symbol(mpl, temp->sym);
}
/* append the symbol to the subscript list */
tuple = expand_tuple(mpl, tuple, sym);
/* skip optional comma */
if (mpl->token == T_COMMA) get_token(mpl /* , */);
}
/* read value and assign it to new parameter member */
if (!is_symbol(mpl))
{ xassert(with != NULL);
error(mpl, "one item missing in data group beginning with %s",
format_symbol(mpl, with));
}
read_value(mpl, par, tuple);
return;
}
/*----------------------------------------------------------------------
-- tabular_format - read parameter data block in tabular format.
--
-- This routine reads parameter data block using the syntax:
--
-- <tabular format> ::= <column> <column> ... <column> :=
-- <row> <value> <value> ... <value>
-- <row> <value> <value> ... <value>
-- . . . . . . . . . . .
-- <row> <value> <value> ... <value>
--
-- where <rows> are symbols that denote rows of the table, <columns>
-- are symbols that denote columns of the table, <values> are numeric
-- or symbolic values assigned to the corresponding parameter members.
-- If <value> is specified as single point, no value is provided.
--
-- Number of components in the slice must be the same as dimension of
-- the parameter. The slice must have two null positions. To construct
-- complete subscript list for particular <value> the routine replaces
-- the first null position of the slice by the corresponding <row> (or
-- <column>, if the flag tr is on) and the second null position by the
-- corresponding <column> (or by <row>, if the flag tr is on). */
void tabular_format
( MPL *mpl,
PARAMETER *par, /* not changed */
SLICE *slice, /* not changed */
int tr
)
{ SLICE *list, *col, *temp;
TUPLE *tuple;
SYMBOL *row;
xassert(par != NULL);
xassert(par->dim == slice_dimen(mpl, slice));
xassert(slice_arity(mpl, slice) == 2);
/* read the table heading that contains column symbols (the table
may have no columns) */
list = create_slice(mpl);
while (mpl->token != T_ASSIGN)
{ /* read column symbol and append it to the column list */
if (!is_symbol(mpl))
error(mpl, "number, symbol, or := missing where expected");
list = expand_slice(mpl, list, read_symbol(mpl));
}
get_token(mpl /* := */);
/* read zero or more rows that contain tabular data */
while (is_symbol(mpl))
{ /* read row symbol (if the table has no columns, these symbols
are just ignored) */
row = read_symbol(mpl);
/* read values accordingly to the column list */
for (col = list; col != NULL; col = col->next)
{ int which = 0;
/* if the token is single point, no value is provided */
if (is_literal(mpl, "."))
{ get_token(mpl /* . */);
continue;
}
/* construct complete subscript list */
tuple = create_tuple(mpl);
for (temp = slice; temp != NULL; temp = temp->next)
{ if (temp->sym == NULL)
{ /* substitution is needed */
switch (++which)
{ case 1:
/* substitute in the first null position */
tuple = expand_tuple(mpl, tuple,
copy_symbol(mpl, tr ? col->sym : row));
break;
case 2:
/* substitute in the second null position */
tuple = expand_tuple(mpl, tuple,
copy_symbol(mpl, tr ? row : col->sym));
break;
default:
xassert(which != which);
}
}
else
{ /* copy symbol from the slice */
tuple = expand_tuple(mpl, tuple, copy_symbol(mpl,
temp->sym));
}
}
xassert(which == 2);
/* read value and assign it to new parameter member */
if (!is_symbol(mpl))
{ int lack = slice_dimen(mpl, col);
if (lack == 1)
error(mpl, "one item missing in data group beginning "
"with %s", format_symbol(mpl, row));
else
error(mpl, "%d items missing in data group beginning "
"with %s", lack, format_symbol(mpl, row));
}
read_value(mpl, par, tuple);
}
/* delete the row symbol */
delete_symbol(mpl, row);
}
/* delete the column list */
delete_slice(mpl, list);
return;
}
/*----------------------------------------------------------------------
-- tabbing_format - read parameter data block in tabbing format.
--
-- This routine reads parameter data block using the syntax:
--
-- <tabbing format> ::= <prefix> <name> , ... , <name> , := ,
-- <symbol> , ... , <symbol> , <value> , ... , <value> ,
-- <symbol> , ... , <symbol> , <value> , ... , <value> ,
-- . . . . . . . . . . . . . . . . .
-- <symbol> , ... , <symbol> , <value> , ... , <value>
-- <prefix> ::= <empty>
-- <prefix> ::= <set name> :
--
-- where <names> are names of parameters (all the parameters must be
-- subscripted and have identical dimensions), <symbols> are symbols
-- used to define subscripts of parameter members, <values> are numeric
-- or symbolic values assigned to the corresponding parameter members.
-- Optional <prefix> may specify a simple set, in which case n-tuples
-- built of <symbols> for each row of the data table (i.e. subscripts
-- of parameter members) are added to the specified set. Commae between
-- data items are optional and may be omitted anywhere.
--
-- If the parameter altval is not NULL, it specifies a default value
-- provided for all the parameters specified in the data block. */
void tabbing_format
( MPL *mpl,
SYMBOL *altval /* not changed */
)
{ SET *set = NULL;
PARAMETER *par;
SLICE *list, *col;
TUPLE *tuple;
int next_token, j, dim = 0;
char *last_name = NULL;
/* read the optional <prefix> */
if (is_symbol(mpl))
{ get_token(mpl /* <symbol> */);
next_token = mpl->token;
unget_token(mpl /* <symbol> */);
if (next_token == T_COLON)
{ /* select the set to saturate it with data */
set = select_set(mpl, mpl->image);
/* the set must be simple (i.e. not set of sets) */
if (set->dim != 0)
error(mpl, "%s must be a simple set", set->name);
/* and must not be defined yet */
if (set->array->head != NULL)
error(mpl, "%s already defined", set->name);
/* add new (the only) member to the set and assign it empty
elemental set */
add_member(mpl, set->array, NULL)->value.set =
create_elemset(mpl, set->dimen);
last_name = set->name, dim = set->dimen;
get_token(mpl /* <symbol> */);
xassert(mpl->token == T_COLON);
get_token(mpl /* : */);
}
}
/* read the table heading that contains parameter names */
list = create_slice(mpl);
while (mpl->token != T_ASSIGN)
{ /* there must be symbolic name of parameter */
if (!is_symbol(mpl))
error(mpl, "parameter name or := missing where expected");
/* select the parameter to saturate it with data */
par = select_parameter(mpl, mpl->image);
/* the parameter must be subscripted */
if (par->dim == 0)
error(mpl, "%s not a subscripted parameter", mpl->image);
/* the set (if specified) and all the parameters in the data
block must have identical dimension */
if (dim != 0 && par->dim != dim)
{ xassert(last_name != NULL);
error(mpl, "%s has dimension %d while %s has dimension %d",
last_name, dim, par->name, par->dim);
}
/* set default value for the parameter (if specified) */
if (altval != NULL)
set_default(mpl, par, copy_symbol(mpl, altval));
/* append the parameter to the column list */
list = expand_slice(mpl, list, (SYMBOL *)par);
last_name = par->name, dim = par->dim;
get_token(mpl /* <symbol> */);
/* skip optional comma */
if (mpl->token == T_COMMA) get_token(mpl /* , */);
}
if (slice_dimen(mpl, list) == 0)
error(mpl, "at least one parameter name required");
get_token(mpl /* := */);
/* skip optional comma */
if (mpl->token == T_COMMA) get_token(mpl /* , */);
/* read rows that contain tabbing data */
while (is_symbol(mpl))
{ /* read subscript list */
tuple = create_tuple(mpl);
for (j = 1; j <= dim; j++)
{ /* read j-th subscript */
if (!is_symbol(mpl))
{ int lack = slice_dimen(mpl, list) + dim - j + 1;
xassert(tuple != NULL);
xassert(lack > 1);
error(mpl, "%d items missing in data group beginning wit"
"h %s", lack, format_symbol(mpl, tuple->sym));
}
/* read and append j-th subscript to the n-tuple */
tuple = expand_tuple(mpl, tuple, read_symbol(mpl));
/* skip optional comma *between* <symbols> */
if (j < dim && mpl->token == T_COMMA)
get_token(mpl /* , */);
}
/* if the set is specified, add to it new n-tuple, which is a
copy of the subscript list just read */
if (set != NULL)
check_then_add(mpl, set->array->head->value.set,
copy_tuple(mpl, tuple));
/* skip optional comma between <symbol> and <value> */
if (mpl->token == T_COMMA) get_token(mpl /* , */);
/* read values accordingly to the column list */
for (col = list; col != NULL; col = col->next)
{ /* if the token is single point, no value is provided */
if (is_literal(mpl, "."))
{ get_token(mpl /* . */);
continue;
}
/* read value and assign it to new parameter member */
if (!is_symbol(mpl))
{ int lack = slice_dimen(mpl, col);
xassert(tuple != NULL);
if (lack == 1)
error(mpl, "one item missing in data group beginning "
"with %s", format_symbol(mpl, tuple->sym));
else
error(mpl, "%d items missing in data group beginning "
"with %s", lack, format_symbol(mpl, tuple->sym));
}
read_value(mpl, (PARAMETER *)col->sym, copy_tuple(mpl,
tuple));
/* skip optional comma preceding the next value */
if (col->next != NULL && mpl->token == T_COMMA)
get_token(mpl /* , */);
}
/* delete the original subscript list */
delete_tuple(mpl, tuple);
/* skip optional comma (only if there is next data group) */
if (mpl->token == T_COMMA)
{ get_token(mpl /* , */);
if (!is_symbol(mpl)) unget_token(mpl /* , */);
}
}
/* delete the column list (it contains parameters, not symbols,
so nullify it before) */
for (col = list; col != NULL; col = col->next) col->sym = NULL;
delete_slice(mpl, list);
return;
}
/*----------------------------------------------------------------------
-- parameter_data - read parameter data.
--
-- This routine reads parameter data using the syntax:
--
-- <parameter data> ::= param <default value> : <tabbing format> ;
-- <parameter data> ::= param <parameter name> <default value>
-- <assignments> ;
-- <parameter name> ::= <symbolic name>
-- <default value> ::= <empty>
-- <default value> ::= default <symbol>
-- <assignments> ::= <empty>
-- <assignments> ::= <assignments> , :=
-- <assignments> ::= <assignments> , [ <symbol list> ]
-- <assignments> ::= <assignments> , <plain format>
-- <assignemnts> ::= <assignments> , : <tabular format>
-- <assignments> ::= <assignments> , (tr) <tabular format>
-- <assignments> ::= <assignments> , (tr) : <tabular format>
--
-- Commae in <assignments> are optional and may be omitted anywhere. */
void parameter_data(MPL *mpl)
{ PARAMETER *par;
SYMBOL *altval = NULL;
SLICE *slice;
int tr = 0;
xassert(is_literal(mpl, "param"));
get_token(mpl /* param */);
/* read optional default value */
if (is_literal(mpl, "default"))
{ get_token(mpl /* default */);
if (!is_symbol(mpl))
error(mpl, "default value missing where expected");
altval = read_symbol(mpl);
/* if the default value follows the keyword 'param', the next
token must be only the colon */
if (mpl->token != T_COLON)
error(mpl, "colon missing where expected");
}
/* being used after the keyword 'param' or the optional default
value the colon begins data in the tabbing format */
if (mpl->token == T_COLON)
{ get_token(mpl /* : */);
/* skip optional comma */
if (mpl->token == T_COMMA) get_token(mpl /* , */);
/* read parameter data in the tabbing format */
tabbing_format(mpl, altval);
/* on reading data in the tabbing format the default value is
always copied, so delete the original symbol */
if (altval != NULL) delete_symbol(mpl, altval);
/* the next token must be only semicolon */
if (mpl->token != T_SEMICOLON)
error(mpl, "symbol, number, or semicolon missing where expe"
"cted");
get_token(mpl /* ; */);
goto done;
}
/* in other cases there must be symbolic name of parameter, which
follows the keyword 'param' */
if (!is_symbol(mpl))
error(mpl, "parameter name missing where expected");
/* select the parameter to saturate it with data */
par = select_parameter(mpl, mpl->image);
get_token(mpl /* <symbol> */);
/* read optional default value */
if (is_literal(mpl, "default"))
{ get_token(mpl /* default */);
if (!is_symbol(mpl))
error(mpl, "default value missing where expected");
altval = read_symbol(mpl);
/* set default value for the parameter */
set_default(mpl, par, altval);
}
/* create initial fake slice of all asterisks */
slice = fake_slice(mpl, par->dim);
/* read zero or more data assignments */
for (;;)
{ /* skip optional comma */
if (mpl->token == T_COMMA) get_token(mpl /* , */);
/* process current assignment */
if (mpl->token == T_ASSIGN)
{ /* assignment ligature is non-significant element */
get_token(mpl /* := */);
}
else if (mpl->token == T_LBRACKET)
{ /* left bracket begins new slice; delete the current slice
and read new one */
delete_slice(mpl, slice);
slice = read_slice(mpl, par->name, par->dim);
/* each new slice resets the "transpose" indicator */
tr = 0;
}
else if (is_symbol(mpl))
{ /* number or symbol begins data in the plain format */
plain_format(mpl, par, slice);
}
else if (mpl->token == T_COLON)
{ /* colon begins data in the tabular format */
if (par->dim == 0)
err1: error(mpl, "%s not a subscripted parameter",
par->name);
if (slice_arity(mpl, slice) != 2)
err2: error(mpl, "slice currently used must specify 2 asterisk"
"s, not %d", slice_arity(mpl, slice));
get_token(mpl /* : */);
/* read parameter data in the tabular format */
tabular_format(mpl, par, slice, tr);
}
else if (mpl->token == T_LEFT)
{ /* left parenthesis begins the "transpose" indicator, which
is followed by data in the tabular format */
get_token(mpl /* ( */);
if (!is_literal(mpl, "tr"))
err3: error(mpl, "transpose indicator (tr) incomplete");
if (par->dim == 0) goto err1;
if (slice_arity(mpl, slice) != 2) goto err2;
get_token(mpl /* tr */);
if (mpl->token != T_RIGHT) goto err3;
get_token(mpl /* ) */);
/* in this case the colon is optional */
if (mpl->token == T_COLON) get_token(mpl /* : */);
/* set the "transpose" indicator */
tr = 1;
/* read parameter data in the tabular format */
tabular_format(mpl, par, slice, tr);
}
else if (mpl->token == T_SEMICOLON)
{ /* semicolon terminates the data block */
get_token(mpl /* ; */);
break;
}
else
error(mpl, "syntax error in parameter data block");
}
/* delete the current slice */
delete_slice(mpl, slice);
done: return;
}
/*----------------------------------------------------------------------
-- data_section - read data section.
--
-- This routine reads data section using the syntax:
--
-- <data section> ::= <empty>
-- <data section> ::= <data section> <data block> ;
-- <data block> ::= <set data>
-- <data block> ::= <parameter data>
--
-- Reading data section is terminated by either the keyword 'end' or
-- the end of file. */
void data_section(MPL *mpl)
{ while (!(mpl->token == T_EOF || is_literal(mpl, "end")))
{ if (is_literal(mpl, "set"))
set_data(mpl);
else if (is_literal(mpl, "param"))
parameter_data(mpl);
else
error(mpl, "syntax error in data section");
}
return;
}
/* eof */
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