Add m-esr52 at 52.6.0

1 files changed, 607 insertions, 0 deletions

diff --git a/gfx/harfbuzz/src/hb-common.cc b/gfx/harfbuzz/src/hb-common.cc
new file mode 100644
index 000000000..3564e4355
--- /dev/null
+++ b/gfx/harfbuzz/src/hb-common.cc
@@ -0,0 +1,607 @@
+/*
+ * Copyright © 2009,2010  Red Hat, Inc.
+ * Copyright © 2011,2012  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-private.hh"
+
+#include "hb-mutex-private.hh"
+#include "hb-object-private.hh"
+
+#include <locale.h>
+
+
+/* hb_options_t */
+
+hb_options_union_t _hb_options;
+
+void
+_hb_options_init (void)
+{
+  hb_options_union_t u;
+  u.i = 0;
+  u.opts.initialized = 1;
+
+  char *c = getenv ("HB_OPTIONS");
+  u.opts.uniscribe_bug_compatible = c && strstr (c, "uniscribe-bug-compatible");
+
+  /* This is idempotent and threadsafe. */
+  _hb_options = u;
+}
+
+
+/* hb_tag_t */
+
+/**
+ * hb_tag_from_string:
+ * @str: (array length=len) (element-type uint8_t): 
+ * @len: 
+ *
+ * 
+ *
+ * Return value: 
+ *
+ * Since: 0.9.2
+ **/
+hb_tag_t
+hb_tag_from_string (const char *str, int len)
+{
+  char tag[4];
+  unsigned int i;
+
+  if (!str || !len || !*str)
+    return HB_TAG_NONE;
+
+  if (len < 0 || len > 4)
+    len = 4;
+  for (i = 0; i < (unsigned) len && str[i]; i++)
+    tag[i] = str[i];
+  for (; i < 4; i++)
+    tag[i] = ' ';
+
+  return HB_TAG_CHAR4 (tag);
+}
+
+/**
+ * hb_tag_to_string:
+ * @tag: 
+ * @buf: (out caller-allocates) (array fixed-size=4) (element-type uint8_t): 
+ *
+ * 
+ *
+ * Since: 0.9.5
+ **/
+void
+hb_tag_to_string (hb_tag_t tag, char *buf)
+{
+  buf[0] = (char) (uint8_t) (tag >> 24);
+  buf[1] = (char) (uint8_t) (tag >> 16);
+  buf[2] = (char) (uint8_t) (tag >>  8);
+  buf[3] = (char) (uint8_t) (tag >>  0);
+}
+
+
+/* hb_direction_t */
+
+const char direction_strings[][4] = {
+  "ltr",
+  "rtl",
+  "ttb",
+  "btt"
+};
+
+/**
+ * hb_direction_from_string:
+ * @str: (array length=len) (element-type uint8_t): 
+ * @len: 
+ *
+ * 
+ *
+ * Return value: 
+ *
+ * Since: 0.9.2
+ **/
+hb_direction_t
+hb_direction_from_string (const char *str, int len)
+{
+  if (unlikely (!str || !len || !*str))
+    return HB_DIRECTION_INVALID;
+
+  /* Lets match loosely: just match the first letter, such that
+   * all of "ltr", "left-to-right", etc work!
+   */
+  char c = TOLOWER (str[0]);
+  for (unsigned int i = 0; i < ARRAY_LENGTH (direction_strings); i++)
+    if (c == direction_strings[i][0])
+      return (hb_direction_t) (HB_DIRECTION_LTR + i);
+
+  return HB_DIRECTION_INVALID;
+}
+
+/**
+ * hb_direction_to_string:
+ * @direction: 
+ *
+ * 
+ *
+ * Return value: (transfer none): 
+ *
+ * Since: 0.9.2
+ **/
+const char *
+hb_direction_to_string (hb_direction_t direction)
+{
+  if (likely ((unsigned int) (direction - HB_DIRECTION_LTR)
+	      < ARRAY_LENGTH (direction_strings)))
+    return direction_strings[direction - HB_DIRECTION_LTR];
+
+  return "invalid";
+}
+
+
+/* hb_language_t */
+
+struct hb_language_impl_t {
+  const char s[1];
+};
+
+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 bool
+lang_equal (hb_language_t  v1,
+	    const void    *v2)
+{
+  const unsigned char *p1 = (const unsigned char *) v1;
+  const unsigned char *p2 = (const unsigned char *) v2;
+
+  while (*p1 && *p1 == canon_map[*p2])
+    p1++, p2++;
+
+  return *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
+
+
+struct hb_language_item_t {
+
+  struct hb_language_item_t *next;
+  hb_language_t lang;
+
+  inline bool operator == (const char *s) const {
+    return lang_equal (lang, s);
+  }
+
+  inline hb_language_item_t & operator = (const char *s) {
+    lang = (hb_language_t) strdup (s);
+    for (unsigned char *p = (unsigned char *) lang; *p; p++)
+      *p = canon_map[*p];
+
+    return *this;
+  }
+
+  void finish (void) { free ((void *) lang); }
+};
+
+
+/* Thread-safe lock-free language list */
+
+static hb_language_item_t *langs;
+
+#ifdef HB_USE_ATEXIT
+static
+void free_langs (void)
+{
+  while (langs) {
+    hb_language_item_t *next = langs->next;
+    langs->finish ();
+    free (langs);
+    langs = next;
+  }
+}
+#endif
+
+static hb_language_item_t *
+lang_find_or_insert (const char *key)
+{
+retry:
+  hb_language_item_t *first_lang = (hb_language_item_t *) hb_atomic_ptr_get (&langs);
+
+  for (hb_language_item_t *lang = first_lang; lang; lang = lang->next)
+    if (*lang == key)
+      return lang;
+
+  /* Not found; allocate one. */
+  hb_language_item_t *lang = (hb_language_item_t *) calloc (1, sizeof (hb_language_item_t));
+  if (unlikely (!lang))
+    return NULL;
+  lang->next = first_lang;
+  *lang = key;
+
+  if (!hb_atomic_ptr_cmpexch (&langs, first_lang, lang)) {
+    lang->finish ();
+    free (lang);
+    goto retry;
+  }
+
+#ifdef HB_USE_ATEXIT
+  if (!first_lang)
+    atexit (free_langs); /* First person registers atexit() callback. */
+#endif
+
+  return lang;
+}
+
+
+/**
+ * hb_language_from_string:
+ * @str: (array length=len) (element-type uint8_t): a string representing
+ *       ISO 639 language code
+ * @len: length of the @str, or -1 if it is %NULL-terminated.
+ *
+ * Converts @str representing an ISO 639 language code to the corresponding
+ * #hb_language_t.
+ *
+ * Return value: (transfer none):
+ * The #hb_language_t corresponding to the ISO 639 language code.
+ *
+ * Since: 0.9.2
+ **/
+hb_language_t
+hb_language_from_string (const char *str, int len)
+{
+  if (!str || !len || !*str)
+    return HB_LANGUAGE_INVALID;
+
+  hb_language_item_t *item = NULL;
+  if (len >= 0)
+  {
+    /* NUL-terminate it. */
+    char strbuf[64];
+    len = MIN (len, (int) sizeof (strbuf) - 1);
+    memcpy (strbuf, str, len);
+    strbuf[len] = '\0';
+    item = lang_find_or_insert (strbuf);
+  }
+  else
+    item = lang_find_or_insert (str);
+
+  return likely (item) ? item->lang : HB_LANGUAGE_INVALID;
+}
+
+/**
+ * hb_language_to_string:
+ * @language: an #hb_language_t to convert.
+ *
+ * See hb_language_from_string().
+ *
+ * Return value: (transfer none):
+ * A %NULL-terminated string representing the @language. Must not be freed by
+ * the caller.
+ *
+ * Since: 0.9.2
+ **/
+const char *
+hb_language_to_string (hb_language_t language)
+{
+  /* This is actually NULL-safe! */
+  return language->s;
+}
+
+/**
+ * hb_language_get_default:
+ *
+ * 
+ *
+ * Return value: (transfer none):
+ *
+ * Since: 0.9.2
+ **/
+hb_language_t
+hb_language_get_default (void)
+{
+  static hb_language_t default_language = HB_LANGUAGE_INVALID;
+
+  hb_language_t language = (hb_language_t) hb_atomic_ptr_get (&default_language);
+  if (unlikely (language == HB_LANGUAGE_INVALID)) {
+    language = hb_language_from_string (setlocale (LC_CTYPE, NULL), -1);
+    (void) hb_atomic_ptr_cmpexch (&default_language, HB_LANGUAGE_INVALID, language);
+  }
+
+  return default_language;
+}
+
+
+/* hb_script_t */
+
+/**
+ * hb_script_from_iso15924_tag:
+ * @tag: an #hb_tag_t representing an ISO 15924 tag.
+ *
+ * Converts an ISO 15924 script tag to a corresponding #hb_script_t.
+ *
+ * Return value: 
+ * An #hb_script_t corresponding to the ISO 15924 tag.
+ *
+ * Since: 0.9.2
+ **/
+hb_script_t
+hb_script_from_iso15924_tag (hb_tag_t tag)
+{
+  if (unlikely (tag == HB_TAG_NONE))
+    return HB_SCRIPT_INVALID;
+
+  /* Be lenient, adjust case (one capital letter followed by three small letters) */
+  tag = (tag & 0xDFDFDFDFu) | 0x00202020u;
+
+  switch (tag) {
+
+    /* These graduated from the 'Q' private-area codes, but
+     * the old code is still aliased by Unicode, and the Qaai
+     * one in use by ICU. */
+    case HB_TAG('Q','a','a','i'): return HB_SCRIPT_INHERITED;
+    case HB_TAG('Q','a','a','c'): return HB_SCRIPT_COPTIC;
+
+    /* Script variants from http://unicode.org/iso15924/ */
+    case HB_TAG('C','y','r','s'): return HB_SCRIPT_CYRILLIC;
+    case HB_TAG('L','a','t','f'): return HB_SCRIPT_LATIN;
+    case HB_TAG('L','a','t','g'): return HB_SCRIPT_LATIN;
+    case HB_TAG('S','y','r','e'): return HB_SCRIPT_SYRIAC;
+    case HB_TAG('S','y','r','j'): return HB_SCRIPT_SYRIAC;
+    case HB_TAG('S','y','r','n'): return HB_SCRIPT_SYRIAC;
+  }
+
+  /* If it looks right, just use the tag as a script */
+  if (((uint32_t) tag & 0xE0E0E0E0u) == 0x40606060u)
+    return (hb_script_t) tag;
+
+  /* Otherwise, return unknown */
+  return HB_SCRIPT_UNKNOWN;
+}
+
+/**
+ * hb_script_from_string:
+ * @str: (array length=len) (element-type uint8_t): a string representing an
+ *       ISO 15924 tag.
+ * @len: length of the @str, or -1 if it is %NULL-terminated.
+ *
+ * Converts a string @str representing an ISO 15924 script tag to a
+ * corresponding #hb_script_t. Shorthand for hb_tag_from_string() then
+ * hb_script_from_iso15924_tag().
+ *
+ * Return value: 
+ * An #hb_script_t corresponding to the ISO 15924 tag.
+ *
+ * Since: 0.9.2
+ **/
+hb_script_t
+hb_script_from_string (const char *str, int len)
+{
+  return hb_script_from_iso15924_tag (hb_tag_from_string (str, len));
+}
+
+/**
+ * hb_script_to_iso15924_tag:
+ * @script: an #hb_script_ to convert.
+ *
+ * See hb_script_from_iso15924_tag().
+ *
+ * Return value:
+ * An #hb_tag_t representing an ISO 15924 script tag.
+ *
+ * Since: 0.9.2
+ **/
+hb_tag_t
+hb_script_to_iso15924_tag (hb_script_t script)
+{
+  return (hb_tag_t) script;
+}
+
+/**
+ * hb_script_get_horizontal_direction:
+ * @script: 
+ *
+ * 
+ *
+ * Return value: 
+ *
+ * Since: 0.9.2
+ **/
+hb_direction_t
+hb_script_get_horizontal_direction (hb_script_t script)
+{
+  /* http://goo.gl/x9ilM */
+  switch ((hb_tag_t) script)
+  {
+    /* Unicode-1.1 additions */
+    case HB_SCRIPT_ARABIC:
+    case HB_SCRIPT_HEBREW:
+
+    /* Unicode-3.0 additions */
+    case HB_SCRIPT_SYRIAC:
+    case HB_SCRIPT_THAANA:
+
+    /* Unicode-4.0 additions */
+    case HB_SCRIPT_CYPRIOT:
+
+    /* Unicode-4.1 additions */
+    case HB_SCRIPT_KHAROSHTHI:
+
+    /* Unicode-5.0 additions */
+    case HB_SCRIPT_PHOENICIAN:
+    case HB_SCRIPT_NKO:
+
+    /* Unicode-5.1 additions */
+    case HB_SCRIPT_LYDIAN:
+
+    /* Unicode-5.2 additions */
+    case HB_SCRIPT_AVESTAN:
+    case HB_SCRIPT_IMPERIAL_ARAMAIC:
+    case HB_SCRIPT_INSCRIPTIONAL_PAHLAVI:
+    case HB_SCRIPT_INSCRIPTIONAL_PARTHIAN:
+    case HB_SCRIPT_OLD_SOUTH_ARABIAN:
+    case HB_SCRIPT_OLD_TURKIC:
+    case HB_SCRIPT_SAMARITAN:
+
+    /* Unicode-6.0 additions */
+    case HB_SCRIPT_MANDAIC:
+
+    /* Unicode-6.1 additions */
+    case HB_SCRIPT_MEROITIC_CURSIVE:
+    case HB_SCRIPT_MEROITIC_HIEROGLYPHS:
+
+    /* Unicode-7.0 additions */
+    case HB_SCRIPT_MANICHAEAN:
+    case HB_SCRIPT_MENDE_KIKAKUI:
+    case HB_SCRIPT_NABATAEAN:
+    case HB_SCRIPT_OLD_NORTH_ARABIAN:
+    case HB_SCRIPT_PALMYRENE:
+    case HB_SCRIPT_PSALTER_PAHLAVI:
+
+    /* Unicode-8.0 additions */
+    case HB_SCRIPT_OLD_HUNGARIAN:
+
+    /* Unicode-9.0 additions */
+    case HB_SCRIPT_ADLAM:
+
+      return HB_DIRECTION_RTL;
+  }
+
+  return HB_DIRECTION_LTR;
+}
+
+
+/* hb_user_data_array_t */
+
+bool
+hb_user_data_array_t::set (hb_user_data_key_t *key,
+			   void *              data,
+			   hb_destroy_func_t   destroy,
+			   hb_bool_t           replace)
+{
+  if (!key)
+    return false;
+
+  if (replace) {
+    if (!data && !destroy) {
+      items.remove (key, lock);
+      return true;
+    }
+  }
+  hb_user_data_item_t item = {key, data, destroy};
+  bool ret = !!items.replace_or_insert (item, lock, (bool) replace);
+
+  return ret;
+}
+
+void *
+hb_user_data_array_t::get (hb_user_data_key_t *key)
+{
+  hb_user_data_item_t item = {NULL, NULL, NULL};
+
+  return items.find (key, &item, lock) ? item.data : NULL;
+}
+
+
+/* hb_version */
+
+/**
+ * hb_version:
+ * @major: (out): Library major version component.
+ * @minor: (out): Library minor version component.
+ * @micro: (out): Library micro version component.
+ *
+ * Returns library version as three integer components.
+ *
+ * Since: 0.9.2
+ **/
+void
+hb_version (unsigned int *major,
+	    unsigned int *minor,
+	    unsigned int *micro)
+{
+  *major = HB_VERSION_MAJOR;
+  *minor = HB_VERSION_MINOR;
+  *micro = HB_VERSION_MICRO;
+}
+
+/**
+ * hb_version_string:
+ *
+ * Returns library version as a string with three components.
+ *
+ * Return value: library version string.
+ *
+ * Since: 0.9.2
+ **/
+const char *
+hb_version_string (void)
+{
+  return HB_VERSION_STRING;
+}
+
+/**
+ * hb_version_atleast:
+ * @major: 
+ * @minor: 
+ * @micro: 
+ *
+ * 
+ *
+ * Return value: 
+ *
+ * Since: 0.9.30
+ **/
+hb_bool_t
+hb_version_atleast (unsigned int major,
+		    unsigned int minor,
+		    unsigned int micro)
+{
+  return HB_VERSION_ATLEAST (major, minor, micro);
+}