Update harfbuzz-ng to 1a5a91dc0d8bf4b72a2f22dc6300b06ad7000b79.

third_party/harfbuzz-ng/src/hb-language.c

-/*
- * Copyright (C) 2009  Red Hat, 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
- */
-
-#include "hb-private.h"
-
-#include "hb-language.h"
-
-HB_BEGIN_DECLS
-
-
-static const char canon_map[256] = {
-   0,   0,   0,   0,   0,   0,   0,   0,    0,   0,   0,   0,   0,   0,   0,   0,
-   0,   0,   0,   0,   0,   0,   0,   0,    0,   0,   0,   0,   0,   0,   0,   0,
-   0,   0,   0,   0,   0,   0,   0,   0,    0,   0,   0,   0,   0,  '-',  0,   0,
-  '0', '1', '2', '3', '4', '5', '6', '7',  '8', '9',  0,   0,   0,   0,   0,   0,
-  '-', 'a', 'b', 'c', 'd', 'e', 'f', 'g',  'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
-  'p', 'q', 'r', 's', 't', 'u', 'v', 'w',  'x', 'y', 'z',  0,   0,   0,   0,  '-',
-   0,  'a', 'b', 'c', 'd', 'e', 'f', 'g',  'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
-  'p', 'q', 'r', 's', 't', 'u', 'v', 'w',  'x', 'y', 'z',  0,   0,   0,   0,   0
-};
-
-static hb_bool_t
-lang_equal (const void *v1,
-            const void *v2)
-{
-  const unsigned char *p1 = v1;
-  const unsigned char *p2 = v2;
-
-  while (canon_map[*p1] && canon_map[*p1] == canon_map[*p2])
-    {
-      p1++, p2++;
-    }
-
-  return (canon_map[*p1] == canon_map[*p2]);
-}
-
-#if 0
-static unsigned int
-lang_hash (const void *key)
-{
-  const unsigned char *p = key;
-  unsigned int h = 0;
-  while (canon_map[*p])
-    {
-      h = (h << 5) - h + canon_map[*p];
-      p++;
-    }
-
-  return h;
-}
-#endif
-
-
-hb_language_t
-hb_language_from_string (const char *str)
-{
-  static unsigned int num_langs;
-  static unsigned int num_alloced;
-  static const char **langs;
-  unsigned int i;
-  unsigned char *p;
-
-  /* TODO Use a hash table or something */
-
-  if (!str)
-    return NULL;
-
-  for (i = 0; i < num_langs; i++)
-    if (lang_equal (str, langs[i]))
-      return langs[i];
-
-  if (unlikely (num_langs == num_alloced)) {
-    unsigned int new_alloced = 2 * (8 + num_alloced);
-    const char **new_langs = realloc (langs, new_alloced * sizeof (langs[0]));
-    if (!new_langs)
-      return NULL;
-    num_alloced = new_alloced;
-    langs = new_langs;
-  }
-
-  langs[i] = strdup (str);
-  for (p = (unsigned char *) langs[i]; *p; p++)
-    *p = canon_map[*p];
-
-  num_langs++;
-
-  return (hb_language_t) langs[i];
-}
-
-const char *
-hb_language_to_string (hb_language_t language)
-{
-  return (const char *) language;
-}
-
-
-HB_END_DECLS