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/*
Copyright 1996-2014 Han The Thanh, <thanh@pdftex.org>
This file is part of pdfTeX.
pdfTeX 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.
pdfTeX 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 "ptexlib.h"
/**********************************************************************/
/* All encoding entries go into AVL tree for fast search by name. */
struct avl_table *fe_tree = NULL;
/* AVL sort fe_entry into fe_tree by name */
static int comp_fe_entry(const void *pa, const void *pb, 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;
}
/**********************************************************************/
void epdf_write_enc(char **glyph_names, int fe_objnum)
{
int i, i_old;
assert(glyph_names != NULL);
assert(fe_objnum != 0);
pdfbegindict(fe_objnum, 1);
pdf_puts("/Type /Encoding\n");
pdf_puts("/Differences [");
for (i = 0, i_old = -2; i < 256; i++)
if (glyph_names[i] != notdef) {
if (i == i_old + 1) /* no gap */
pdf_printf("/%s", glyph_names[i]);
else {
if (i_old == -2)
pdf_printf("%i/%s", i, glyph_names[i]);
else
pdf_printf(" %i/%s", i, glyph_names[i]);
}
i_old = i;
}
pdf_puts("]\n");
pdfenddict();
}
static void write_enc(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);
pdfbegindict(fe_objnum, 1);
pdf_puts("/Type /Encoding\n");
pdf_puts("/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("/%s", glyph_names[*p]);
else {
if (i_old == -2)
pdf_printf("%i/%s", *p, glyph_names[*p]);
else
pdf_printf(" %i/%s", *p, glyph_names[*p]);
}
i_old = *p;
}
pdf_puts("]\n");
pdfenddict();
}
static void write_fontencoding(fe_entry * fe)
{
assert(fe != NULL);
write_enc(fe->glyph_names, fe->tx_tree, fe->fe_objnum);
}
void write_fontencodings(void)
{
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(fe);
}
/**********************************************************************/
/* cleaning up... */
static void destroy_fe_entry(void *pa, void *pb)
{
fe_entry *p;
int i;
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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