--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/source/fitz/encodings.c	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,184 @@
+// Copyright (C) 2004-2021 Artifex Software, Inc.
+//
+// This file is part of MuPDF.
+//
+// MuPDF is free software: you can redistribute it and/or modify it under the
+// terms of the GNU Affero General Public License as published by the Free
+// Software Foundation, either version 3 of the License, or (at your option)
+// any later version.
+//
+// MuPDF 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 Affero General Public License for more
+// details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with MuPDF. If not, see <https://www.gnu.org/licenses/agpl-3.0.en.html>
+//
+// Alternative licensing terms are available from the licensor.
+// For commercial licensing, see <https://www.artifex.com/> or contact
+// Artifex Software, Inc., 39 Mesa Street, Suite 108A, San Francisco,
+// CA 94129, USA, for further information.
+
+#include "mupdf/fitz.h"
+#include "mupdf/pdf.h"
+
+#include <string.h>
+#include <stdlib.h>
+
+#include "encodings.h"
+#include "glyphlist.h"
+#include "smallcaps.h"
+
+#define FROM_UNICODE(ENC) \
+	int l = 0; \
+	int r = nelem(ENC##_from_unicode) - 1; \
+	if (u < 128) \
+		return u; \
+	while (l <= r) \
+	{ \
+		int m = (l + r) >> 1; \
+		if (u < ENC##_from_unicode[m].u) \
+			r = m - 1; \
+		else if (u > ENC##_from_unicode[m].u) \
+			l = m + 1; \
+		else \
+			return ENC##_from_unicode[m].c; \
+	} \
+	return -1; \
+
+int fz_iso8859_1_from_unicode(int u) { FROM_UNICODE(iso8859_1) }
+int fz_iso8859_7_from_unicode(int u) { FROM_UNICODE(iso8859_7) }
+int fz_koi8u_from_unicode(int u) { FROM_UNICODE(koi8u) }
+int fz_windows_1250_from_unicode(int u) { FROM_UNICODE(windows_1250) }
+int fz_windows_1251_from_unicode(int u) { FROM_UNICODE(windows_1251) }
+int fz_windows_1252_from_unicode(int u) { FROM_UNICODE(windows_1252) }
+
+int
+fz_unicode_from_glyph_name_strict(const char *name)
+{
+	int l = 0;
+	int r = nelem(single_name_list) - 1;
+
+	while (l <= r)
+	{
+		int m = (l + r) >> 1;
+		int c = strcmp(name, single_name_list[m]);
+		if (c < 0)
+			r = m - 1;
+		else if (c > 0)
+			l = m + 1;
+		else
+			return single_code_list[m];
+	}
+	return 0;
+}
+
+static int
+read_num(const char *p, int base)
+{
+	char *e;
+	int v = strtol(p, &e, base);
+	if (*e != 0)
+		return 0;
+	return v;
+}
+
+int
+fz_unicode_from_glyph_name(const char *name)
+{
+	char buf[64];
+	char *p;
+	int l = 0;
+	int r = nelem(single_name_list) - 1;
+	int code = 0;
+
+	fz_strlcpy(buf, name, sizeof buf);
+
+	/* kill anything after first period and underscore */
+	p = strchr(buf, '.');
+	if (p) p[0] = 0;
+	p = strchr(buf, '_');
+	if (p)
+	{
+		/* Hacky tests for alternative ligature names */
+		if (buf[0] == 'f')
+		{
+			if (!strcmp(buf, "f_f"))
+				strcpy(buf, "ff");
+			else if (!strcmp(buf, "f_f_i"))
+				strcpy(buf, "ffi");
+			else if (!strcmp(buf, "f_f_l"))
+				strcpy(buf, "ffl");
+			else if (!strcmp(buf, "f_i"))
+				strcpy(buf, "fi");
+			else if (!strcmp(buf, "f_l"))
+				strcpy(buf, "fl");
+			else
+				p[0] = 0;
+		}
+		else
+			p[0] = 0;
+	}
+
+	while (l <= r)
+	{
+		int m = (l + r) >> 1;
+		int c = strcmp(buf, single_name_list[m]);
+		if (c < 0)
+			r = m - 1;
+		else if (c > 0)
+			l = m + 1;
+		else
+			return single_code_list[m];
+	}
+
+	if (buf[0] == 'u' && buf[1] == 'n' && buf[2] == 'i' && strlen(buf) == 7)
+		code = read_num(buf+3, 16);
+	else if (buf[0] == 'u')
+		code = read_num(buf+1, 16);
+	else if (buf[0] == 'a' && buf[1] != 0 && buf[2] != 0)
+		code = read_num(buf+1, 10);
+	else
+		code = read_num(buf, 10);
+
+	return (code > 0 && code <= 0x10ffff) ? code : FZ_REPLACEMENT_CHARACTER;
+}
+
+static const char *empty_dup_list[] = { 0 };
+
+const char **
+fz_duplicate_glyph_names_from_unicode(int ucs)
+{
+	int l = 0;
+	int r = nelem(agl_dup_offsets) / 2 - 1;
+	while (l <= r)
+	{
+		int m = (l + r) >> 1;
+		if (ucs < agl_dup_offsets[m << 1])
+			r = m - 1;
+		else if (ucs > agl_dup_offsets[m << 1])
+			l = m + 1;
+		else
+			return agl_dup_names + agl_dup_offsets[(m << 1) + 1];
+	}
+	return empty_dup_list;
+}
+
+const char *
+fz_glyph_name_from_unicode_sc(int u)
+{
+	int l = 0;
+	int r = nelem(glyph_name_from_unicode_sc) / 2 - 1;
+	while (l <= r)
+	{
+		int m = (l + r) >> 1;
+		if (u < glyph_name_from_unicode_sc[m].u)
+			r = m - 1;
+		else if (u > glyph_name_from_unicode_sc[m].u)
+			l = m + 1;
+		else
+			return glyph_name_from_unicode_sc[m].n;
+	}
+	return NULL;
+}