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% writeenc.w
%
% Copyright 1996-2006 Han The Thanh <thanh@@pdftex.org>
% Copyright 2006-2008 Taco Hoekwater <taco@@luatex.org>
% This file is part of LuaTeX.
% LuaTeX 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 2 of the License, or (at your
% option) any later version.
% LuaTeX 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 Lesser General Public
% License for more details.
% You should have received a copy of the GNU General Public License along
% with LuaTeX; if not, see <http://www.gnu.org/licenses/>. */
@ @c
#include "ptexlib.h"
static const char _svn_version[] =
"$Id: writeenc.w 3612 2010-04-13 09:29:42Z taco $ "
"$URL: http://foundry.supelec.fr/svn/luatex/branches/0.60.x/source/texk/web2c/luatexdir/font/writeenc.w $";
@ All encoding entries go into AVL tree for fast search by name.
@c
struct avl_table *fe_tree = NULL;
@ AVL sort |fe_entry| into |fe_tree| by name
@c
static int comp_fe_entry(const void *pa, const void *pb, void *p)
{
(void) p;
return strcmp(((const fe_entry *) pa)->name, ((const fe_entry *) pb)->name);
}
static fe_entry *new_fe_entry(void)
{
fe_entry *fe;
fe = xtalloc(1, fe_entry);
fe->name = NULL;
fe->fe_objnum = 0;
fe->glyph_names = NULL; /* encoding file not yet read in */
fe->tx_tree = NULL;
return fe;
}
static fe_entry *lookup_fe_entry(char *s)
{
fe_entry fe;
assert(s != NULL);
fe.name = s;
if (fe_tree == NULL) {
fe_tree = avl_create(comp_fe_entry, NULL, &avl_xallocator);
assert(fe_tree != NULL);
}
return (fe_entry *) avl_find(fe_tree, &fe);
}
static void register_fe_entry(fe_entry * fe)
{
void **aa;
if (fe_tree == NULL) {
fe_tree = avl_create(comp_fe_entry, NULL, &avl_xallocator);
assert(fe_tree != NULL);
}
assert(fe != NULL);
assert(fe->name != NULL);
assert(lookup_fe_entry(fe->name) == NULL); /* encoding not yet registered */
aa = avl_probe(fe_tree, fe);
assert(aa != NULL);
}
fe_entry *get_fe_entry(char *s)
{
fe_entry *fe;
char **gl;
if ((fe = lookup_fe_entry(s)) == NULL && (gl = load_enc_file(s)) != NULL) {
fe = new_fe_entry();
fe->name = s;
fe->glyph_names = gl;
register_fe_entry(fe);
}
return fe;
}
@ @c
static void write_enc(PDF pdf, char **glyph_names, struct avl_table *tx_tree,
int fe_objnum)
{
int i_old, *p;
struct avl_traverser t;
assert(glyph_names != NULL);
assert(tx_tree != NULL);
assert(fe_objnum != 0);
pdf_begin_dict(pdf, fe_objnum, 1);
pdf_puts(pdf, "/Type /Encoding\n");
pdf_puts(pdf, "/Differences [");
avl_t_init(&t, tx_tree);
for (i_old = -2, p = (int *) avl_t_first(&t, tx_tree); p != NULL;
p = (int *) avl_t_next(&t)) {
if (*p == i_old + 1) /* no gap */
pdf_printf(pdf, "/%s", glyph_names[*p]);
else {
if (i_old == -2)
pdf_printf(pdf, "%i/%s", *p, glyph_names[*p]);
else
pdf_printf(pdf, " %i/%s", *p, glyph_names[*p]);
}
i_old = *p;
}
pdf_puts(pdf, "]\n");
pdf_end_dict(pdf);
}
static void write_fontencoding(PDF pdf, fe_entry * fe)
{
assert(fe != NULL);
write_enc(pdf, fe->glyph_names, fe->tx_tree, fe->fe_objnum);
}
void write_fontencodings(PDF pdf)
{
fe_entry *fe;
struct avl_traverser t;
if (fe_tree == NULL)
return;
avl_t_init(&t, fe_tree);
for (fe = (fe_entry *) avl_t_first(&t, fe_tree); fe != NULL;
fe = (fe_entry *) avl_t_next(&t))
if (fe->fe_objnum != 0)
write_fontencoding(pdf, fe);
}
@ cleaning up...
@c
static void destroy_fe_entry(void *pa, void *pb)
{
fe_entry *p;
int i;
(void) pb;
p = (fe_entry *) pa;
xfree(p->name);
if (p->glyph_names != NULL)
for (i = 0; i < 256; i++)
if (p->glyph_names[i] != notdef)
xfree(p->glyph_names[i]);
xfree(p->glyph_names);
xfree(p);
}
void enc_free(void)
{
if (fe_tree != NULL)
avl_destroy(fe_tree, destroy_fe_entry);
fe_tree = NULL;
}
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