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authorKarl Berry <karl@freefriends.org>2021-02-25 19:22:25 +0000
committerKarl Berry <karl@freefriends.org>2021-02-25 19:22:25 +0000
commitad547a6b5986815fda458221149728d9d9ab1d87 (patch)
tree16296910eb3eca724371474ea9aea3994dc69614 /Build/source/texk/web2c/luatexdir/font/writeenc.c
parent947b43de3dd21d58ccc2ffadefc4441ea1c2a813 (diff)
restore Build,TODO from r57911
git-svn-id: svn://tug.org/texlive/trunk@57915 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Build/source/texk/web2c/luatexdir/font/writeenc.c')
-rw-r--r--Build/source/texk/web2c/luatexdir/font/writeenc.c164
1 files changed, 164 insertions, 0 deletions
diff --git a/Build/source/texk/web2c/luatexdir/font/writeenc.c b/Build/source/texk/web2c/luatexdir/font/writeenc.c
new file mode 100644
index 00000000000..554c246a5dc
--- /dev/null
+++ b/Build/source/texk/web2c/luatexdir/font/writeenc.c
@@ -0,0 +1,164 @@
+/*
+
+Copyright 1996-2006 Han The Thanh <thanh@pdftex.org>
+Copyright 2006-2011 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/>.
+
+*/
+
+#include "ptexlib.h"
+
+/*tex
+
+ All encoding entries go into AVL tree for fast search by name.
+
+*/
+
+struct avl_table *fe_tree = NULL;
+
+/* The AVL sort |fe_entry| into |fe_tree| by name. */
+
+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;
+ /*tex The encoding file is not yet read in. */
+ fe->glyph_names = NULL;
+ 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);
+ /*tex The encoding is not yet registered. */
+ assert(lookup_fe_entry(fe->name) == NULL);
+ 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;
+}
+
+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_obj(pdf, fe_objnum, OBJSTM_ALWAYS);
+ pdf_begin_dict(pdf);
+ pdf_dict_add_name(pdf, "Type", "Encoding");
+ pdf_add_name(pdf, "Differences");
+ pdf_begin_array(pdf);
+ 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) {
+ pdf_add_name(pdf, glyph_names[*p]);
+ } else {
+ pdf_add_int(pdf, *p);
+ pdf_add_name(pdf, glyph_names[*p]);
+ }
+ i_old = *p;
+ }
+ pdf_end_array(pdf);
+ pdf_end_dict(pdf);
+ pdf_end_obj(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);
+}
+
+/*tex Cleaning up \unknown */
+
+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);
+ if (p->tx_tree != NULL)
+ avl_destroy(p->tx_tree,NULL);
+ xfree(p);
+}
+
+void enc_free(void)
+{
+ if (fe_tree != NULL)
+ avl_destroy(fe_tree, destroy_fe_entry);
+ fe_tree = NULL;
+}