--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/harfbuzz/src/hb-icu.cc	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,290 @@
+/*
+ * Copyright © 2009  Red Hat, Inc.
+ * Copyright © 2009  Keith Stribley
+ * Copyright © 2011  Google, Inc.
+ *
+ *  This is part of HarfBuzz, a text shaping library.
+ *
+ * Permission is hereby granted, without written agreement and without
+ * license or royalty fees, to use, copy, modify, and distribute this
+ * software and its documentation for any purpose, provided that the
+ * above copyright notice and the following two paragraphs appear in
+ * all copies of this software.
+ *
+ * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
+ * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
+ * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
+ * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ *
+ * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
+ * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
+ * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+ *
+ * Red Hat Author(s): Behdad Esfahbod
+ * Google Author(s): Behdad Esfahbod
+ */
+
+#include "hb.hh"
+
+#ifdef HAVE_ICU
+
+#include "hb-icu.h"
+
+#include "hb-machinery.hh"
+
+#include <unicode/uchar.h>
+#include <unicode/unorm2.h>
+#include <unicode/ustring.h>
+#include <unicode/utf16.h>
+#include <unicode/uversion.h>
+
+/* ICU extra semicolon, fixed since 65, https://github.com/unicode-org/icu/commit/480bec3 */
+#if U_ICU_VERSION_MAJOR_NUM < 65 && (defined(__GNUC__) || defined(__clang__))
+#define HB_ICU_EXTRA_SEMI_IGNORED
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wextra-semi-stmt"
+#endif
+
+/**
+ * SECTION:hb-icu
+ * @title: hb-icu
+ * @short_description: ICU integration
+ * @include: hb-icu.h
+ *
+ * Functions for using HarfBuzz with the International Components for Unicode
+ * (ICU) library. HarfBuzz supports using ICU to provide Unicode data, by attaching
+ * ICU functions to the virtual methods in a #hb_unicode_funcs_t function
+ * structure.
+ **/
+
+/**
+ * hb_icu_script_to_script:
+ * @script: The UScriptCode identifier to query
+ *
+ * Fetches the #hb_script_t script that corresponds to the
+ * specified UScriptCode identifier.
+ *
+ * Return value: the #hb_script_t script found
+ *
+ **/
+
+hb_script_t
+hb_icu_script_to_script (UScriptCode script)
+{
+  if (unlikely (script == USCRIPT_INVALID_CODE))
+    return HB_SCRIPT_INVALID;
+
+  return hb_script_from_string (uscript_getShortName (script), -1);
+}
+
+/**
+ * hb_icu_script_from_script:
+ * @script: The #hb_script_t script to query
+ *
+ * Fetches the UScriptCode identifier that corresponds to the
+ * specified #hb_script_t script.
+ *
+ * Return value: the UScriptCode identifier found
+ *
+ **/
+UScriptCode
+hb_icu_script_from_script (hb_script_t script)
+{
+  if (unlikely (script == HB_SCRIPT_INVALID))
+    return USCRIPT_INVALID_CODE;
+
+  unsigned int numScriptCode = 1 + u_getIntPropertyMaxValue (UCHAR_SCRIPT);
+  for (unsigned int i = 0; i < numScriptCode; i++)
+    if (unlikely (hb_icu_script_to_script ((UScriptCode) i) == script))
+      return (UScriptCode) i;
+
+  return USCRIPT_UNKNOWN;
+}
+
+
+static hb_unicode_combining_class_t
+hb_icu_unicode_combining_class (hb_unicode_funcs_t *ufuncs HB_UNUSED,
+				hb_codepoint_t      unicode,
+				void               *user_data HB_UNUSED)
+
+{
+  return (hb_unicode_combining_class_t) u_getCombiningClass (unicode);
+}
+
+static hb_unicode_general_category_t
+hb_icu_unicode_general_category (hb_unicode_funcs_t *ufuncs HB_UNUSED,
+				 hb_codepoint_t      unicode,
+				 void               *user_data HB_UNUSED)
+{
+  switch (u_getIntPropertyValue(unicode, UCHAR_GENERAL_CATEGORY))
+  {
+  case U_UNASSIGNED:			return HB_UNICODE_GENERAL_CATEGORY_UNASSIGNED;
+
+  case U_UPPERCASE_LETTER:		return HB_UNICODE_GENERAL_CATEGORY_UPPERCASE_LETTER;
+  case U_LOWERCASE_LETTER:		return HB_UNICODE_GENERAL_CATEGORY_LOWERCASE_LETTER;
+  case U_TITLECASE_LETTER:		return HB_UNICODE_GENERAL_CATEGORY_TITLECASE_LETTER;
+  case U_MODIFIER_LETTER:		return HB_UNICODE_GENERAL_CATEGORY_MODIFIER_LETTER;
+  case U_OTHER_LETTER:			return HB_UNICODE_GENERAL_CATEGORY_OTHER_LETTER;
+
+  case U_NON_SPACING_MARK:		return HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK;
+  case U_ENCLOSING_MARK:		return HB_UNICODE_GENERAL_CATEGORY_ENCLOSING_MARK;
+  case U_COMBINING_SPACING_MARK:	return HB_UNICODE_GENERAL_CATEGORY_SPACING_MARK;
+
+  case U_DECIMAL_DIGIT_NUMBER:		return HB_UNICODE_GENERAL_CATEGORY_DECIMAL_NUMBER;
+  case U_LETTER_NUMBER:			return HB_UNICODE_GENERAL_CATEGORY_LETTER_NUMBER;
+  case U_OTHER_NUMBER:			return HB_UNICODE_GENERAL_CATEGORY_OTHER_NUMBER;
+
+  case U_SPACE_SEPARATOR:		return HB_UNICODE_GENERAL_CATEGORY_SPACE_SEPARATOR;
+  case U_LINE_SEPARATOR:		return HB_UNICODE_GENERAL_CATEGORY_LINE_SEPARATOR;
+  case U_PARAGRAPH_SEPARATOR:		return HB_UNICODE_GENERAL_CATEGORY_PARAGRAPH_SEPARATOR;
+
+  case U_CONTROL_CHAR:			return HB_UNICODE_GENERAL_CATEGORY_CONTROL;
+  case U_FORMAT_CHAR:			return HB_UNICODE_GENERAL_CATEGORY_FORMAT;
+  case U_PRIVATE_USE_CHAR:		return HB_UNICODE_GENERAL_CATEGORY_PRIVATE_USE;
+  case U_SURROGATE:			return HB_UNICODE_GENERAL_CATEGORY_SURROGATE;
+
+
+  case U_DASH_PUNCTUATION:		return HB_UNICODE_GENERAL_CATEGORY_DASH_PUNCTUATION;
+  case U_START_PUNCTUATION:		return HB_UNICODE_GENERAL_CATEGORY_OPEN_PUNCTUATION;
+  case U_END_PUNCTUATION:		return HB_UNICODE_GENERAL_CATEGORY_CLOSE_PUNCTUATION;
+  case U_CONNECTOR_PUNCTUATION:		return HB_UNICODE_GENERAL_CATEGORY_CONNECT_PUNCTUATION;
+  case U_OTHER_PUNCTUATION:		return HB_UNICODE_GENERAL_CATEGORY_OTHER_PUNCTUATION;
+
+  case U_MATH_SYMBOL:			return HB_UNICODE_GENERAL_CATEGORY_MATH_SYMBOL;
+  case U_CURRENCY_SYMBOL:		return HB_UNICODE_GENERAL_CATEGORY_CURRENCY_SYMBOL;
+  case U_MODIFIER_SYMBOL:		return HB_UNICODE_GENERAL_CATEGORY_MODIFIER_SYMBOL;
+  case U_OTHER_SYMBOL:			return HB_UNICODE_GENERAL_CATEGORY_OTHER_SYMBOL;
+
+  case U_INITIAL_PUNCTUATION:		return HB_UNICODE_GENERAL_CATEGORY_INITIAL_PUNCTUATION;
+  case U_FINAL_PUNCTUATION:		return HB_UNICODE_GENERAL_CATEGORY_FINAL_PUNCTUATION;
+  }
+
+  return HB_UNICODE_GENERAL_CATEGORY_UNASSIGNED;
+}
+
+static hb_codepoint_t
+hb_icu_unicode_mirroring (hb_unicode_funcs_t *ufuncs HB_UNUSED,
+			  hb_codepoint_t      unicode,
+			  void               *user_data HB_UNUSED)
+{
+  return u_charMirror(unicode);
+}
+
+static hb_script_t
+hb_icu_unicode_script (hb_unicode_funcs_t *ufuncs HB_UNUSED,
+		       hb_codepoint_t      unicode,
+		       void               *user_data HB_UNUSED)
+{
+  UErrorCode status = U_ZERO_ERROR;
+  UScriptCode scriptCode = uscript_getScript(unicode, &status);
+
+  if (unlikely (U_FAILURE (status)))
+    return HB_SCRIPT_UNKNOWN;
+
+  return hb_icu_script_to_script (scriptCode);
+}
+
+static hb_bool_t
+hb_icu_unicode_compose (hb_unicode_funcs_t *ufuncs HB_UNUSED,
+			hb_codepoint_t      a,
+			hb_codepoint_t      b,
+			hb_codepoint_t     *ab,
+			void               *user_data)
+{
+  const UNormalizer2 *normalizer = (const UNormalizer2 *) user_data;
+  UChar32 ret = unorm2_composePair (normalizer, a, b);
+  if (ret < 0) return false;
+  *ab = ret;
+  return true;
+}
+
+static hb_bool_t
+hb_icu_unicode_decompose (hb_unicode_funcs_t *ufuncs HB_UNUSED,
+			  hb_codepoint_t      ab,
+			  hb_codepoint_t     *a,
+			  hb_codepoint_t     *b,
+			  void               *user_data)
+{
+  const UNormalizer2 *normalizer = (const UNormalizer2 *) user_data;
+  UChar decomposed[4];
+  int len;
+  UErrorCode icu_err = U_ZERO_ERROR;
+  len = unorm2_getRawDecomposition (normalizer, ab, decomposed,
+				    ARRAY_LENGTH (decomposed), &icu_err);
+  if (U_FAILURE (icu_err) || len < 0) return false;
+
+  len = u_countChar32 (decomposed, len);
+  if (len == 1)
+  {
+    U16_GET_UNSAFE (decomposed, 0, *a);
+    *b = 0;
+    return *a != ab;
+  }
+  else if (len == 2)
+  {
+    len = 0;
+    U16_NEXT_UNSAFE (decomposed, len, *a);
+    U16_NEXT_UNSAFE (decomposed, len, *b);
+  }
+  return true;
+}
+
+
+static inline void free_static_icu_funcs ();
+
+static struct hb_icu_unicode_funcs_lazy_loader_t : hb_unicode_funcs_lazy_loader_t<hb_icu_unicode_funcs_lazy_loader_t>
+{
+  static hb_unicode_funcs_t *create ()
+  {
+    void *user_data = nullptr;
+    UErrorCode icu_err = U_ZERO_ERROR;
+    user_data = (void *) unorm2_getNFCInstance (&icu_err);
+    assert (user_data);
+
+    hb_unicode_funcs_t *funcs = hb_unicode_funcs_create (nullptr);
+
+    hb_unicode_funcs_set_combining_class_func (funcs, hb_icu_unicode_combining_class, nullptr, nullptr);
+    hb_unicode_funcs_set_general_category_func (funcs, hb_icu_unicode_general_category, nullptr, nullptr);
+    hb_unicode_funcs_set_mirroring_func (funcs, hb_icu_unicode_mirroring, nullptr, nullptr);
+    hb_unicode_funcs_set_script_func (funcs, hb_icu_unicode_script, nullptr, nullptr);
+    hb_unicode_funcs_set_compose_func (funcs, hb_icu_unicode_compose, user_data, nullptr);
+    hb_unicode_funcs_set_decompose_func (funcs, hb_icu_unicode_decompose, user_data, nullptr);
+
+    hb_unicode_funcs_make_immutable (funcs);
+
+    hb_atexit (free_static_icu_funcs);
+
+    return funcs;
+  }
+} static_icu_funcs;
+
+static inline
+void free_static_icu_funcs ()
+{
+  static_icu_funcs.free_instance ();
+}
+
+/**
+ * hb_icu_get_unicode_funcs:
+ *
+ * Fetches a Unicode-functions structure that is populated
+ * with the appropriate ICU function for each method.
+ *
+ * Return value: (transfer none): a pointer to the #hb_unicode_funcs_t Unicode-functions structure
+ *
+ * Since: 0.9.38
+ **/
+hb_unicode_funcs_t *
+hb_icu_get_unicode_funcs ()
+{
+  return static_icu_funcs.get_unconst ();
+}
+
+#ifdef HB_ICU_EXTRA_SEMI_IGNORED
+#pragma GCC diagnostic pop
+#endif
+
+#endif