Add m-esr52 at 52.6.0

1 files changed, 296 insertions, 0 deletions

diff --git a/gfx/harfbuzz/src/hb-buffer-private.hh b/gfx/harfbuzz/src/hb-buffer-private.hh
new file mode 100644
index 000000000..bca308da2
--- /dev/null
+++ b/gfx/harfbuzz/src/hb-buffer-private.hh
@@ -0,0 +1,296 @@
+/*
+ * Copyright © 1998-2004  David Turner and Werner Lemberg
+ * Copyright © 2004,2007,2009,2010  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): Owen Taylor, Behdad Esfahbod
+ * Google Author(s): Behdad Esfahbod
+ */
+
+#ifndef HB_BUFFER_PRIVATE_HH
+#define HB_BUFFER_PRIVATE_HH
+
+#include "hb-private.hh"
+#include "hb-object-private.hh"
+#include "hb-unicode-private.hh"
+
+
+#ifndef HB_BUFFER_MAX_EXPANSION_FACTOR
+#define HB_BUFFER_MAX_EXPANSION_FACTOR 32
+#endif
+#ifndef HB_BUFFER_MAX_LEN_MIN
+#define HB_BUFFER_MAX_LEN_MIN 8192
+#endif
+#ifndef HB_BUFFER_MAX_LEN_DEFAULT
+#define HB_BUFFER_MAX_LEN_DEFAULT 0x3FFFFFFF /* Shaping more than a billion chars? Let us know! */
+#endif
+
+ASSERT_STATIC (sizeof (hb_glyph_info_t) == 20);
+ASSERT_STATIC (sizeof (hb_glyph_info_t) == sizeof (hb_glyph_position_t));
+
+HB_MARK_AS_FLAG_T (hb_buffer_flags_t);
+HB_MARK_AS_FLAG_T (hb_buffer_serialize_flags_t);
+
+enum hb_buffer_scratch_flags_t {
+  HB_BUFFER_SCRATCH_FLAG_DEFAULT			= 0x00000000u,
+  HB_BUFFER_SCRATCH_FLAG_HAS_NON_ASCII			= 0x00000001u,
+  HB_BUFFER_SCRATCH_FLAG_HAS_DEFAULT_IGNORABLES		= 0x00000002u,
+  HB_BUFFER_SCRATCH_FLAG_HAS_SPACE_FALLBACK		= 0x00000004u,
+  HB_BUFFER_SCRATCH_FLAG_HAS_GPOS_ATTACHMENT		= 0x00000008u,
+  /* Reserved for complex shapers' internal use. */
+  HB_BUFFER_SCRATCH_FLAG_COMPLEX0			= 0x01000000u,
+  HB_BUFFER_SCRATCH_FLAG_COMPLEX1			= 0x02000000u,
+  HB_BUFFER_SCRATCH_FLAG_COMPLEX2			= 0x04000000u,
+  HB_BUFFER_SCRATCH_FLAG_COMPLEX3			= 0x08000000u,
+};
+HB_MARK_AS_FLAG_T (hb_buffer_scratch_flags_t);
+
+
+/*
+ * hb_buffer_t
+ */
+
+struct hb_buffer_t {
+  hb_object_header_t header;
+  ASSERT_POD ();
+
+  /* Information about how the text in the buffer should be treated */
+  hb_unicode_funcs_t *unicode; /* Unicode functions */
+  hb_buffer_flags_t flags; /* BOT / EOT / etc. */
+  hb_buffer_cluster_level_t cluster_level;
+  hb_codepoint_t replacement; /* U+FFFD or something else. */
+  hb_buffer_scratch_flags_t scratch_flags; /* Have space-flallback, etc. */
+  unsigned int max_len; /* Maximum allowed len. */
+
+  /* Buffer contents */
+  hb_buffer_content_type_t content_type;
+  hb_segment_properties_t props; /* Script, language, direction */
+
+  bool in_error; /* Allocation failed */
+  bool have_output; /* Whether we have an output buffer going on */
+  bool have_positions; /* Whether we have positions */
+
+  unsigned int idx; /* Cursor into ->info and ->pos arrays */
+  unsigned int len; /* Length of ->info and ->pos arrays */
+  unsigned int out_len; /* Length of ->out array if have_output */
+
+  unsigned int allocated; /* Length of allocated arrays */
+  hb_glyph_info_t     *info;
+  hb_glyph_info_t     *out_info;
+  hb_glyph_position_t *pos;
+
+  inline hb_glyph_info_t &cur (unsigned int i = 0) { return info[idx + i]; }
+  inline hb_glyph_info_t cur (unsigned int i = 0) const { return info[idx + i]; }
+
+  inline hb_glyph_position_t &cur_pos (unsigned int i = 0) { return pos[idx + i]; }
+  inline hb_glyph_position_t cur_pos (unsigned int i = 0) const { return pos[idx + i]; }
+
+  inline hb_glyph_info_t &prev (void) { return out_info[out_len ? out_len - 1 : 0]; }
+  inline hb_glyph_info_t prev (void) const { return out_info[out_len ? out_len - 1 : 0]; }
+
+  inline bool has_separate_output (void) const { return info != out_info; }
+
+  unsigned int serial;
+
+  /* Text before / after the main buffer contents.
+   * Always in Unicode, and ordered outward.
+   * Index 0 is for "pre-context", 1 for "post-context". */
+  static const unsigned int CONTEXT_LENGTH = 5;
+  hb_codepoint_t context[2][CONTEXT_LENGTH];
+  unsigned int context_len[2];
+
+  /* Debugging API */
+  hb_buffer_message_func_t message_func;
+  void *message_data;
+  hb_destroy_func_t message_destroy;
+
+  /* Internal debugging. */
+  /* The bits here reflect current allocations of the bytes in glyph_info_t's var1 and var2. */
+#ifndef HB_NDEBUG
+  uint8_t allocated_var_bits;
+#endif
+  inline void allocate_var (unsigned int start, unsigned int count)
+  {
+#ifndef HB_NDEBUG
+    unsigned int end = start + count;
+    assert (end <= 8);
+    unsigned int bits = (1u<<end) - (1u<<start);
+    assert (0 == (allocated_var_bits & bits));
+    allocated_var_bits |= bits;
+#endif
+  }
+  inline void deallocate_var (unsigned int start, unsigned int count)
+  {
+#ifndef HB_NDEBUG
+    unsigned int end = start + count;
+    assert (end <= 8);
+    unsigned int bits = (1u<<end) - (1u<<start);
+    assert (bits == (allocated_var_bits & bits));
+    allocated_var_bits &= ~bits;
+#endif
+  }
+  inline void assert_var (unsigned int start, unsigned int count)
+  {
+#ifndef HB_NDEBUG
+    unsigned int end = start + count;
+    assert (end <= 8);
+    unsigned int bits = (1u<<end) - (1u<<start);
+    assert (bits == (allocated_var_bits & bits));
+#endif
+  }
+  inline void deallocate_var_all (void)
+  {
+#ifndef HB_NDEBUG
+    allocated_var_bits = 0;
+#endif
+  }
+
+
+  /* Methods */
+
+  HB_INTERNAL void reset (void);
+  HB_INTERNAL void clear (void);
+
+  inline unsigned int backtrack_len (void) const
+  { return have_output? out_len : idx; }
+  inline unsigned int lookahead_len (void) const
+  { return len - idx; }
+  inline unsigned int next_serial (void) { return serial++; }
+
+  HB_INTERNAL void add (hb_codepoint_t  codepoint,
+			unsigned int    cluster);
+  HB_INTERNAL void add_info (const hb_glyph_info_t &glyph_info);
+
+  HB_INTERNAL void reverse_range (unsigned int start, unsigned int end);
+  HB_INTERNAL void reverse (void);
+  HB_INTERNAL void reverse_clusters (void);
+  HB_INTERNAL void guess_segment_properties (void);
+
+  HB_INTERNAL void swap_buffers (void);
+  HB_INTERNAL void remove_output (void);
+  HB_INTERNAL void clear_output (void);
+  HB_INTERNAL void clear_positions (void);
+
+  HB_INTERNAL void replace_glyphs (unsigned int num_in,
+				   unsigned int num_out,
+				   const hb_codepoint_t *glyph_data);
+
+  HB_INTERNAL void replace_glyph (hb_codepoint_t glyph_index);
+  /* Makes a copy of the glyph at idx to output and replace glyph_index */
+  HB_INTERNAL void output_glyph (hb_codepoint_t glyph_index);
+  HB_INTERNAL void output_info (const hb_glyph_info_t &glyph_info);
+  /* Copies glyph at idx to output but doesn't advance idx */
+  HB_INTERNAL void copy_glyph (void);
+  HB_INTERNAL bool move_to (unsigned int i); /* i is output-buffer index. */
+  /* Copies glyph at idx to output and advance idx.
+   * If there's no output, just advance idx. */
+  inline void
+  next_glyph (void)
+  {
+    if (have_output)
+    {
+      if (unlikely (out_info != info || out_len != idx)) {
+	if (unlikely (!make_room_for (1, 1))) return;
+	out_info[out_len] = info[idx];
+      }
+      out_len++;
+    }
+
+    idx++;
+  }
+
+  /* Advance idx without copying to output. */
+  inline void skip_glyph (void) { idx++; }
+
+  inline void reset_masks (hb_mask_t mask)
+  {
+    for (unsigned int j = 0; j < len; j++)
+      info[j].mask = mask;
+  }
+  inline void add_masks (hb_mask_t mask)
+  {
+    for (unsigned int j = 0; j < len; j++)
+      info[j].mask |= mask;
+  }
+  HB_INTERNAL void set_masks (hb_mask_t value,
+			      hb_mask_t mask,
+			      unsigned int cluster_start,
+			      unsigned int cluster_end);
+
+  HB_INTERNAL void merge_clusters (unsigned int start,
+				   unsigned int end)
+  {
+    if (end - start < 2)
+      return;
+    merge_clusters_impl (start, end);
+  }
+  HB_INTERNAL void merge_clusters_impl (unsigned int start,
+					unsigned int end);
+  HB_INTERNAL void merge_out_clusters (unsigned int start,
+				       unsigned int end);
+  /* Merge clusters for deleting current glyph, and skip it. */
+  HB_INTERNAL void delete_glyph (void);
+
+  /* Internal methods */
+  HB_INTERNAL bool enlarge (unsigned int size);
+
+  inline bool ensure (unsigned int size)
+  { return likely (!size || size < allocated) ? true : enlarge (size); }
+
+  inline bool ensure_inplace (unsigned int size)
+  { return likely (!size || size < allocated); }
+
+  HB_INTERNAL bool make_room_for (unsigned int num_in, unsigned int num_out);
+  HB_INTERNAL bool shift_forward (unsigned int count);
+
+  typedef long scratch_buffer_t;
+  HB_INTERNAL scratch_buffer_t *get_scratch_buffer (unsigned int *size);
+
+  inline void clear_context (unsigned int side) { context_len[side] = 0; }
+
+  HB_INTERNAL void sort (unsigned int start, unsigned int end, int(*compar)(const hb_glyph_info_t *, const hb_glyph_info_t *));
+
+  inline bool messaging (void) { return unlikely (message_func); }
+  inline bool message (hb_font_t *font, const char *fmt, ...) HB_PRINTF_FUNC(3, 4)
+  {
+    if (!messaging ())
+      return true;
+    va_list ap;
+    va_start (ap, fmt);
+    bool ret = message_impl (font, fmt, ap);
+    va_end (ap);
+    return ret;
+  }
+  HB_INTERNAL bool message_impl (hb_font_t *font, const char *fmt, va_list ap) HB_PRINTF_FUNC(3, 0);
+};
+
+
+#define HB_BUFFER_XALLOCATE_VAR(b, func, var) \
+  b->func (offsetof (hb_glyph_info_t, var) - offsetof(hb_glyph_info_t, var1), \
+	   sizeof (b->info[0].var))
+#define HB_BUFFER_ALLOCATE_VAR(b, var)		HB_BUFFER_XALLOCATE_VAR (b, allocate_var,   var ())
+#define HB_BUFFER_DEALLOCATE_VAR(b, var)	HB_BUFFER_XALLOCATE_VAR (b, deallocate_var, var ())
+#define HB_BUFFER_ASSERT_VAR(b, var)		HB_BUFFER_XALLOCATE_VAR (b, assert_var,     var ())
+
+
+#endif /* HB_BUFFER_PRIVATE_HH */