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/*
# tfm_kern.c: deal with TFM kern lists.
#
# Copyright (C) 1992, 2011 Free Software Foundation, Inc.
#
# This program 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.
#
# This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
#
*/
#include "config.h"
#include "list.h"
#include "tfm.h"
/* The character RIGHT may or may not be in the list of kerns already. */
void
tfm_set_kern (list_type *kern_table, charcode_type right, real k)
{
unsigned this_right;
tfm_kern_type *new_kern;
assert (kern_table != NULL);
for (this_right = 0; this_right < LIST_SIZE (*kern_table); this_right++)
{
tfm_kern_type *kern = LIST_ELT (*kern_table, this_right);
if (kern->character == right)
{ /* Already there, just replace the value. */
kern->kern = k;
return;
}
}
/* RIGHT wasn't in the existing list. Add it to the end. */
new_kern = LIST_TAPPEND (kern_table, tfm_kern_type);
new_kern->character = right;
new_kern->kern = k;
}
/* Find the kern between the characters LEFT and RIGHT. (Return zero if
none such.) */
real
tfm_get_kern (tfm_char_type left, charcode_type right)
{
list_type kern_table;
unsigned r;
if (!TFM_CHAR_EXISTS (left))
return 0.0;
kern_table = left.kern;
for (r = 0; r < LIST_SIZE (kern_table); r++)
{
tfm_kern_type *kern = LIST_ELT (kern_table, r);
if (kern->character == right)
return kern->kern;
}
return 0.0;
}
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