/*
- * Copyright (C) 1998-2004 David Turner and Werner Lemberg
- * Copyright (C) 2004,2007,2009,2010 Red Hat, Inc.
+ * Copyright © 1998-2004 David Turner and Werner Lemberg
+ * Copyright © 2004,2007,2009,2010 Red Hat, Inc.
+ * Copyright © 2011 Google, Inc.
*
- * This is part of HarfBuzz, a text shaping library.
+ * 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
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*
* Red Hat Author(s): Owen Taylor, Behdad Esfahbod
+ * Google Author(s): Behdad Esfahbod
*/
#include "hb-buffer-private.hh"
HB_BEGIN_DECLS
+#ifndef HB_DEBUG_BUFFER
+#define HB_DEBUG_BUFFER (HB_DEBUG+0)
+#endif
+
+
static hb_buffer_t _hb_buffer_nil = {
- HB_REFERENCE_COUNT_INVALID, /* ref_count */
+ HB_OBJECT_HEADER_STATIC,
- &_hb_unicode_funcs_nil /* unicode */
+ &_hb_unicode_funcs_default,
+ {
+ HB_DIRECTION_INVALID,
+ HB_SCRIPT_INVALID,
+ NULL,
+ },
+
+ TRUE, /* in_error */
+ TRUE, /* have_output */
+ TRUE /* have_positions */
};
/* Here is how the buffer works internally:
*
* As an optimization, both info and out_info may point to the
* same piece of memory, which is owned by info. This remains the
- * case as long as out_len doesn't exceed len at any time.
- * In that case, swap() is no-op and the glyph operations operate
+ * case as long as out_len doesn't exceed i at any time.
+ * In that case, swap_buffers() is no-op and the glyph operations operate
* mostly in-place.
*
* As soon as out_info gets longer than info, out_info is moved over
* to an alternate buffer (which we reuse the pos buffer for!), and its
* current contents (out_len entries) are copied to the new place.
- * This should all remain transparent to the user. swap() then
+ * This should all remain transparent to the user. swap_buffers() then
* switches info and out_info.
*/
-static hb_bool_t
-_hb_buffer_enlarge (hb_buffer_t *buffer, unsigned int size)
+
+/* Internal API */
+
+bool
+hb_buffer_t::enlarge (unsigned int size)
{
- if (unlikely (buffer->in_error))
+ if (unlikely (in_error))
return FALSE;
- unsigned int new_allocated = buffer->allocated;
- hb_glyph_position_t *new_pos;
- hb_glyph_info_t *new_info;
- bool separate_out;
+ unsigned int new_allocated = allocated;
+ hb_glyph_position_t *new_pos = NULL;
+ hb_glyph_info_t *new_info = NULL;
+ bool separate_out = out_info != info;
- separate_out = buffer->out_info != buffer->info;
+ if (unlikely (_hb_unsigned_int_mul_overflows (size, sizeof (info[0]))))
+ goto done;
while (size > new_allocated)
- new_allocated += (new_allocated >> 1) + 8;
+ new_allocated += (new_allocated >> 1) + 32;
- new_pos = (hb_glyph_position_t *) realloc (buffer->pos, new_allocated * sizeof (buffer->pos[0]));
- new_info = (hb_glyph_info_t *) realloc (buffer->info, new_allocated * sizeof (buffer->info[0]));
+ ASSERT_STATIC (sizeof (info[0]) == sizeof (pos[0]));
+ if (unlikely (_hb_unsigned_int_mul_overflows (new_allocated, sizeof (info[0]))))
+ goto done;
+ new_pos = (hb_glyph_position_t *) realloc (pos, new_allocated * sizeof (pos[0]));
+ new_info = (hb_glyph_info_t *) realloc (info, new_allocated * sizeof (info[0]));
+
+done:
if (unlikely (!new_pos || !new_info))
- buffer->in_error = TRUE;
+ in_error = TRUE;
if (likely (new_pos))
- buffer->pos = new_pos;
+ pos = new_pos;
if (likely (new_info))
- buffer->info = new_info;
+ info = new_info;
- buffer->out_info = separate_out ? (hb_glyph_info_t *) buffer->pos : buffer->info;
- if (likely (!buffer->in_error))
- buffer->allocated = new_allocated;
+ out_info = separate_out ? (hb_glyph_info_t *) pos : info;
+ if (likely (!in_error))
+ allocated = new_allocated;
- return likely (!buffer->in_error);
+ return likely (!in_error);
}
-static inline hb_bool_t
-_hb_buffer_ensure (hb_buffer_t *buffer, unsigned int size)
+bool
+hb_buffer_t::make_room_for (unsigned int num_in,
+ unsigned int num_out)
{
- return likely (size <= buffer->allocated) ? TRUE : _hb_buffer_enlarge (buffer, size);
-}
+ if (unlikely (!ensure (out_len + num_out))) return FALSE;
-static inline hb_bool_t
-_hb_buffer_ensure_separate (hb_buffer_t *buffer, unsigned int size)
-{
- if (unlikely (!_hb_buffer_ensure (buffer, size))) return FALSE;
-
- if (buffer->out_info == buffer->info)
+ if (out_info == info &&
+ out_len + num_out > idx + num_in)
{
- assert (buffer->have_output);
+ assert (have_output);
- buffer->out_info = (hb_glyph_info_t *) buffer->pos;
- memcpy (buffer->out_info, buffer->info, buffer->out_len * sizeof (buffer->out_info[0]));
+ out_info = (hb_glyph_info_t *) pos;
+ memcpy (out_info, info, out_len * sizeof (out_info[0]));
}
return TRUE;
}
-/* Public API */
+/* HarfBuzz-Internal API */
-hb_buffer_t *
-hb_buffer_create (unsigned int pre_alloc_size)
+void
+hb_buffer_t::reset (void)
{
- hb_buffer_t *buffer;
+ if (unlikely (hb_object_is_inert (this)))
+ return;
- if (!HB_OBJECT_DO_CREATE (hb_buffer_t, buffer))
- return &_hb_buffer_nil;
+ hb_unicode_funcs_destroy (unicode);
+ unicode = _hb_buffer_nil.unicode;
- if (pre_alloc_size)
- _hb_buffer_ensure (buffer, pre_alloc_size);
+ props = _hb_buffer_nil.props;
- buffer->unicode = &_hb_unicode_funcs_nil;
+ in_error = FALSE;
+ have_output = FALSE;
+ have_positions = FALSE;
- return buffer;
-}
+ idx = 0;
+ len = 0;
+ out_len = 0;
-hb_buffer_t *
-hb_buffer_reference (hb_buffer_t *buffer)
-{
- HB_OBJECT_DO_REFERENCE (buffer);
-}
+ serial = 0;
+ memset (allocated_var_bytes, 0, sizeof allocated_var_bytes);
+ memset (allocated_var_owner, 0, sizeof allocated_var_owner);
-unsigned int
-hb_buffer_get_reference_count (hb_buffer_t *buffer)
-{
- HB_OBJECT_DO_GET_REFERENCE_COUNT (buffer);
+ out_info = info;
}
void
-hb_buffer_destroy (hb_buffer_t *buffer)
+hb_buffer_t::add (hb_codepoint_t codepoint,
+ hb_mask_t mask,
+ unsigned int cluster)
{
- HB_OBJECT_DO_DESTROY (buffer);
+ hb_glyph_info_t *glyph;
- hb_unicode_funcs_destroy (buffer->unicode);
+ if (unlikely (!ensure (len + 1))) return;
- free (buffer->info);
- free (buffer->pos);
+ glyph = &info[len];
- free (buffer);
-}
+ memset (glyph, 0, sizeof (*glyph));
+ glyph->codepoint = codepoint;
+ glyph->mask = mask;
+ glyph->cluster = cluster;
+ len++;
+}
void
-hb_buffer_set_unicode_funcs (hb_buffer_t *buffer,
- hb_unicode_funcs_t *unicode)
+hb_buffer_t::clear_output (void)
{
- if (!unicode)
- unicode = &_hb_unicode_funcs_nil;
+ if (unlikely (hb_object_is_inert (this)))
+ return;
- hb_unicode_funcs_reference (unicode);
- hb_unicode_funcs_destroy (buffer->unicode);
- buffer->unicode = unicode;
-}
+ have_output = TRUE;
+ have_positions = FALSE;
-hb_unicode_funcs_t *
-hb_buffer_get_unicode_funcs (hb_buffer_t *buffer)
-{
- return buffer->unicode;
+ out_len = 0;
+ out_info = info;
}
void
-hb_buffer_set_direction (hb_buffer_t *buffer,
- hb_direction_t direction)
-
+hb_buffer_t::clear_positions (void)
{
- buffer->props.direction = direction;
-}
+ if (unlikely (hb_object_is_inert (this)))
+ return;
-hb_direction_t
-hb_buffer_get_direction (hb_buffer_t *buffer)
-{
- return buffer->props.direction;
+ have_output = FALSE;
+ have_positions = TRUE;
+
+ memset (pos, 0, sizeof (pos[0]) * len);
}
void
-hb_buffer_set_script (hb_buffer_t *buffer,
- hb_script_t script)
+hb_buffer_t::swap_buffers (void)
{
- buffer->props.script = script;
+ if (unlikely (in_error)) return;
+
+ assert (have_output);
+
+ if (out_info != info)
+ {
+ hb_glyph_info_t *tmp_string;
+ tmp_string = info;
+ info = out_info;
+ out_info = tmp_string;
+ pos = (hb_glyph_position_t *) out_info;
+ }
+
+ unsigned int tmp;
+ tmp = len;
+ len = out_len;
+ out_len = tmp;
+
+ idx = 0;
}
-hb_script_t
-hb_buffer_get_script (hb_buffer_t *buffer)
+void
+hb_buffer_t::replace_glyphs_be16 (unsigned int num_in,
+ unsigned int num_out,
+ const uint16_t *glyph_data_be)
{
- return buffer->props.script;
+ if (!make_room_for (num_in, num_out)) return;
+
+ hb_glyph_info_t orig_info = info[idx];
+ for (unsigned int i = 1; i < num_in; i++)
+ {
+ hb_glyph_info_t *inf = &info[idx + i];
+ orig_info.cluster = MIN (orig_info.cluster, inf->cluster);
+ }
+
+ hb_glyph_info_t *pinfo = &out_info[out_len];
+ for (unsigned int i = 0; i < num_out; i++)
+ {
+ *pinfo = orig_info;
+ pinfo->codepoint = hb_be_uint16 (glyph_data_be[i]);
+ pinfo++;
+ }
+
+ idx += num_in;
+ out_len += num_out;
}
void
-hb_buffer_set_language (hb_buffer_t *buffer,
- hb_language_t language)
+hb_buffer_t::output_glyph (hb_codepoint_t glyph_index)
{
- buffer->props.language = language;
+ if (!make_room_for (0, 1)) return;
+
+ out_info[out_len] = info[idx];
+ out_info[out_len].codepoint = glyph_index;
+
+ out_len++;
}
-hb_language_t
-hb_buffer_get_language (hb_buffer_t *buffer)
+void
+hb_buffer_t::copy_glyph (void)
{
- return buffer->props.language;
-}
+ if (!make_room_for (0, 1)) return;
+
+ out_info[out_len] = info[idx];
+ out_len++;
+}
void
-hb_buffer_clear (hb_buffer_t *buffer)
+hb_buffer_t::replace_glyph (hb_codepoint_t glyph_index)
{
- buffer->have_output = FALSE;
- buffer->have_positions = FALSE;
- buffer->in_error = FALSE;
- buffer->len = 0;
- buffer->out_len = 0;
- buffer->i = 0;
- buffer->out_info = buffer->info;
- buffer->max_lig_id = 0;
+ out_info[out_len] = info[idx];
+ out_info[out_len].codepoint = glyph_index;
+
+ idx++;
+ out_len++;
}
-hb_bool_t
-hb_buffer_ensure (hb_buffer_t *buffer, unsigned int size)
+void
+hb_buffer_t::next_glyph (void)
{
- return _hb_buffer_ensure (buffer, size);
+ if (have_output)
+ {
+ if (out_info != info)
+ {
+ if (unlikely (!ensure (out_len + 1))) return;
+ out_info[out_len] = info[idx];
+ }
+ else if (out_len != idx)
+ out_info[out_len] = info[idx];
+
+ out_len++;
+ }
+
+ idx++;
}
void
-hb_buffer_add_glyph (hb_buffer_t *buffer,
- hb_codepoint_t codepoint,
- hb_mask_t mask,
- unsigned int cluster)
+hb_buffer_t::set_masks (hb_mask_t value,
+ hb_mask_t mask,
+ unsigned int cluster_start,
+ unsigned int cluster_end)
{
- hb_glyph_info_t *glyph;
+ hb_mask_t not_mask = ~mask;
+ value &= mask;
- if (unlikely (!_hb_buffer_ensure (buffer, buffer->len + 1))) return;
+ if (!mask)
+ return;
- glyph = &buffer->info[buffer->len];
- glyph->codepoint = codepoint;
- glyph->mask = mask;
- glyph->cluster = cluster;
- glyph->component() = 0;
- glyph->lig_id() = 0;
- glyph->gproperty() = HB_BUFFER_GLYPH_PROPERTIES_UNKNOWN;
+ if (cluster_start == 0 && cluster_end == (unsigned int)-1) {
+ unsigned int count = len;
+ for (unsigned int i = 0; i < count; i++)
+ info[i].mask = (info[i].mask & not_mask) | value;
+ return;
+ }
- buffer->len++;
+ unsigned int count = len;
+ for (unsigned int i = 0; i < count; i++)
+ if (cluster_start <= info[i].cluster && info[i].cluster < cluster_end)
+ info[i].mask = (info[i].mask & not_mask) | value;
}
void
-hb_buffer_clear_positions (hb_buffer_t *buffer)
+hb_buffer_t::reverse_range (unsigned int start,
+ unsigned int end)
{
- _hb_buffer_clear_output (buffer);
- buffer->have_output = FALSE;
- buffer->have_positions = TRUE;
+ unsigned int i, j;
- if (unlikely (!buffer->pos))
- {
- buffer->pos = (hb_glyph_position_t *) calloc (buffer->allocated, sizeof (buffer->pos[0]));
+ if (start == end - 1)
return;
+
+ for (i = start, j = end - 1; i < j; i++, j--) {
+ hb_glyph_info_t t;
+
+ t = info[i];
+ info[i] = info[j];
+ info[j] = t;
}
- memset (buffer->pos, 0, sizeof (buffer->pos[0]) * buffer->len);
-}
+ if (pos) {
+ for (i = start, j = end - 1; i < j; i++, j--) {
+ hb_glyph_position_t t;
-/* HarfBuzz-Internal API */
+ t = pos[i];
+ pos[i] = pos[j];
+ pos[j] = t;
+ }
+ }
+}
void
-_hb_buffer_clear_output (hb_buffer_t *buffer)
+hb_buffer_t::reverse (void)
{
- buffer->have_output = TRUE;
- buffer->have_positions = FALSE;
- buffer->out_len = 0;
- buffer->out_info = buffer->info;
+ if (unlikely (!len))
+ return;
+
+ reverse_range (0, len);
}
void
-_hb_buffer_swap (hb_buffer_t *buffer)
+hb_buffer_t::reverse_clusters (void)
{
- unsigned int tmp;
+ unsigned int i, start, count, last_cluster;
- assert (buffer->have_output);
+ if (unlikely (!len))
+ return;
- if (unlikely (buffer->in_error)) return;
+ reverse ();
- if (buffer->out_info != buffer->info)
- {
- hb_glyph_info_t *tmp_string;
- tmp_string = buffer->info;
- buffer->info = buffer->out_info;
- buffer->out_info = tmp_string;
- buffer->pos = (hb_glyph_position_t *) buffer->out_info;
+ count = len;
+ start = 0;
+ last_cluster = info[0].cluster;
+ for (i = 1; i < count; i++) {
+ if (last_cluster != info[i].cluster) {
+ reverse_range (start, i);
+ start = i;
+ last_cluster = info[i].cluster;
+ }
}
+ reverse_range (start, i);
+}
- tmp = buffer->len;
- buffer->len = buffer->out_len;
- buffer->out_len = tmp;
+static inline void
+dump_var_allocation (const hb_buffer_t *buffer)
+{
+ char buf[80];
+ for (unsigned int i = 0; i < 8; i++)
+ buf[i] = '0' + buffer->allocated_var_bytes[7 - i];
+ buf[8] = '\0';
+ DEBUG_MSG (BUFFER, buffer,
+ "Current var allocation: %s",
+ buf);
+}
- buffer->i = 0;
+void hb_buffer_t::allocate_var (unsigned int byte_i, unsigned int count, const char *owner)
+{
+ assert (byte_i < 8 && byte_i + count <= 8);
+
+ if (DEBUG (BUFFER))
+ dump_var_allocation (this);
+ DEBUG_MSG (BUFFER, this,
+ "Allocating var bytes %d..%d for %s",
+ byte_i, byte_i + count - 1, owner);
+
+ for (unsigned int i = byte_i; i < byte_i + count; i++) {
+ assert (!allocated_var_bytes[i]);
+ allocated_var_bytes[i]++;
+ allocated_var_owner[i] = owner;
+ }
}
-void
-_hb_buffer_replace_glyphs (hb_buffer_t *buffer,
- unsigned int num_in,
- unsigned int num_out,
- const hb_codepoint_t *glyph_data)
+void hb_buffer_t::deallocate_var (unsigned int byte_i, unsigned int count, const char *owner)
{
- if (buffer->out_info != buffer->info ||
- buffer->out_len + num_out > buffer->i + num_in)
- {
- if (unlikely (!_hb_buffer_ensure_separate (buffer, buffer->out_len + num_out)))
- return;
+ if (DEBUG (BUFFER))
+ dump_var_allocation (this);
+
+ DEBUG_MSG (BUFFER, this,
+ "Deallocating var bytes %d..%d for %s",
+ byte_i, byte_i + count - 1, owner);
+
+ assert (byte_i < 8 && byte_i + count <= 8);
+ for (unsigned int i = byte_i; i < byte_i + count; i++) {
+ assert (allocated_var_bytes[i]);
+ assert (0 == strcmp (allocated_var_owner[i], owner));
+ allocated_var_bytes[i]--;
}
+}
- hb_glyph_info_t orig_info = buffer->info[buffer->i];
+void hb_buffer_t::deallocate_var_all (void)
+{
+ memset (allocated_var_bytes, 0, sizeof (allocated_var_bytes));
+ memset (allocated_var_owner, 0, sizeof (allocated_var_owner));
+}
- for (unsigned int i = 0; i < num_out; i++)
- {
- hb_glyph_info_t *info = &buffer->out_info[buffer->out_len + i];
- *info = orig_info;
- info->codepoint = glyph_data[i];
- info->gproperty() = HB_BUFFER_GLYPH_PROPERTIES_UNKNOWN;
+/* Public API */
+
+hb_buffer_t *
+hb_buffer_create (unsigned int pre_alloc_size)
+{
+ hb_buffer_t *buffer;
+
+ if (!(buffer = hb_object_create<hb_buffer_t> ()))
+ return &_hb_buffer_nil;
+
+ buffer->reset ();
+
+ if (pre_alloc_size && !buffer->ensure (pre_alloc_size)) {
+ hb_buffer_destroy (buffer);
+ return &_hb_buffer_nil;
}
- buffer->i += num_in;
- buffer->out_len += num_out;
+ return buffer;
+}
+
+hb_buffer_t *
+hb_buffer_get_empty (void)
+{
+ return &_hb_buffer_nil;
+}
+
+hb_buffer_t *
+hb_buffer_reference (hb_buffer_t *buffer)
+{
+ return hb_object_reference (buffer);
}
void
-_hb_buffer_replace_glyphs_be16 (hb_buffer_t *buffer,
- unsigned int num_in,
- unsigned int num_out,
- const uint16_t *glyph_data_be)
+hb_buffer_destroy (hb_buffer_t *buffer)
{
- if (buffer->out_info != buffer->info ||
- buffer->out_len + num_out > buffer->i + num_in)
- {
- if (unlikely (!_hb_buffer_ensure_separate (buffer, buffer->out_len + num_out)))
- return;
- }
+ if (!hb_object_destroy (buffer)) return;
- hb_glyph_info_t orig_info = buffer->info[buffer->i];
+ hb_unicode_funcs_destroy (buffer->unicode);
- for (unsigned int i = 0; i < num_out; i++)
- {
- hb_glyph_info_t *info = &buffer->out_info[buffer->out_len + i];
- *info = orig_info;
- info->codepoint = hb_be_uint16 (glyph_data_be[i]);
- info->gproperty() = HB_BUFFER_GLYPH_PROPERTIES_UNKNOWN;
- }
+ free (buffer->info);
+ free (buffer->pos);
+
+ free (buffer);
+}
+
+hb_bool_t
+hb_buffer_set_user_data (hb_buffer_t *buffer,
+ hb_user_data_key_t *key,
+ void * data,
+ hb_destroy_func_t destroy)
+{
+ return hb_object_set_user_data (buffer, key, data, destroy);
+}
- buffer->i += num_in;
- buffer->out_len += num_out;
+void *
+hb_buffer_get_user_data (hb_buffer_t *buffer,
+ hb_user_data_key_t *key)
+{
+ return hb_object_get_user_data (buffer, key);
}
+
void
-_hb_buffer_replace_glyph (hb_buffer_t *buffer,
- hb_codepoint_t glyph_index)
+hb_buffer_set_unicode_funcs (hb_buffer_t *buffer,
+ hb_unicode_funcs_t *unicode)
{
- hb_glyph_info_t *info;
+ if (unlikely (hb_object_is_inert (buffer)))
+ return;
- if (buffer->out_info != buffer->info)
- {
- if (unlikely (!_hb_buffer_ensure (buffer, buffer->out_len + 1))) return;
- buffer->out_info[buffer->out_len] = buffer->info[buffer->i];
- }
- else if (buffer->out_len != buffer->i)
- buffer->out_info[buffer->out_len] = buffer->info[buffer->i];
+ if (!unicode)
+ unicode = _hb_buffer_nil.unicode;
- info = &buffer->out_info[buffer->out_len];
- info->codepoint = glyph_index;
- info->gproperty() = HB_BUFFER_GLYPH_PROPERTIES_UNKNOWN;
+ hb_unicode_funcs_reference (unicode);
+ hb_unicode_funcs_destroy (buffer->unicode);
+ buffer->unicode = unicode;
+}
- buffer->i++;
- buffer->out_len++;
+hb_unicode_funcs_t *
+hb_buffer_get_unicode_funcs (hb_buffer_t *buffer)
+{
+ return buffer->unicode;
}
void
-_hb_buffer_next_glyph (hb_buffer_t *buffer)
+hb_buffer_set_direction (hb_buffer_t *buffer,
+ hb_direction_t direction)
+
{
- if (buffer->have_output)
- {
- if (buffer->out_info != buffer->info)
- {
- if (unlikely (!_hb_buffer_ensure (buffer, buffer->out_len + 1))) return;
- buffer->out_info[buffer->out_len] = buffer->info[buffer->i];
- }
- else if (buffer->out_len != buffer->i)
- buffer->out_info[buffer->out_len] = buffer->info[buffer->i];
+ if (unlikely (hb_object_is_inert (buffer)))
+ return;
- buffer->out_len++;
- }
+ buffer->props.direction = direction;
+}
- buffer->i++;
+hb_direction_t
+hb_buffer_get_direction (hb_buffer_t *buffer)
+{
+ return buffer->props.direction;
}
void
-_hb_buffer_reset_masks (hb_buffer_t *buffer,
- hb_mask_t mask)
+hb_buffer_set_script (hb_buffer_t *buffer,
+ hb_script_t script)
{
- unsigned int count = buffer->len;
- for (unsigned int i = 0; i < count; i++)
- buffer->info[i].mask = mask;
+ if (unlikely (hb_object_is_inert (buffer)))
+ return;
+
+ buffer->props.script = script;
+}
+
+hb_script_t
+hb_buffer_get_script (hb_buffer_t *buffer)
+{
+ return buffer->props.script;
}
void
-_hb_buffer_add_masks (hb_buffer_t *buffer,
- hb_mask_t mask)
+hb_buffer_set_language (hb_buffer_t *buffer,
+ hb_language_t language)
{
- unsigned int count = buffer->len;
- for (unsigned int i = 0; i < count; i++)
- buffer->info[i].mask |= mask;
+ if (unlikely (hb_object_is_inert (buffer)))
+ return;
+
+ buffer->props.language = language;
}
+hb_language_t
+hb_buffer_get_language (hb_buffer_t *buffer)
+{
+ return buffer->props.language;
+}
+
+
void
-_hb_buffer_set_masks (hb_buffer_t *buffer,
- hb_mask_t value,
- hb_mask_t mask,
- unsigned int cluster_start,
- unsigned int cluster_end)
+hb_buffer_reset (hb_buffer_t *buffer)
{
- hb_mask_t not_mask = ~mask;
- value &= mask;
+ buffer->reset ();
+}
- if (!mask)
- return;
+hb_bool_t
+hb_buffer_pre_allocate (hb_buffer_t *buffer, unsigned int size)
+{
+ return buffer->ensure (size);
+}
- if (cluster_start == 0 && cluster_end == (unsigned int)-1) {
- unsigned int count = buffer->len;
- for (unsigned int i = 0; i < count; i++)
- buffer->info[i].mask = (buffer->info[i].mask & not_mask) | value;
- return;
- }
+hb_bool_t
+hb_buffer_allocation_successful (hb_buffer_t *buffer)
+{
+ return !buffer->in_error;
+}
- /* XXX can't bsearch since .cluster may not be sorted. */
- /* Binary search to find the start position and go from there. */
- unsigned int min = 0, max = buffer->len;
- while (min < max)
- {
- unsigned int mid = min + ((max - min) / 2);
- if (buffer->info[mid].cluster < cluster_start)
- min = mid + 1;
- else
- max = mid;
- }
- unsigned int count = buffer->len;
- for (unsigned int i = min; i < count && buffer->info[i].cluster < cluster_end; i++)
- buffer->info[i].mask = (buffer->info[i].mask & not_mask) | value;
+void
+hb_buffer_add (hb_buffer_t *buffer,
+ hb_codepoint_t codepoint,
+ hb_mask_t mask,
+ unsigned int cluster)
+{
+ buffer->add (codepoint, mask, cluster);
}
+hb_bool_t
+hb_buffer_set_length (hb_buffer_t *buffer,
+ unsigned int length)
+{
+ if (!buffer->ensure (length))
+ return FALSE;
+
+ /* Wipe the new space */
+ if (length > buffer->len) {
+ memset (buffer->info + buffer->len, 0, sizeof (buffer->info[0]) * (length - buffer->len));
+ if (buffer->have_positions)
+ memset (buffer->pos + buffer->len, 0, sizeof (buffer->pos[0]) * (length - buffer->len));
+ }
-/* Public API again */
+ buffer->len = length;
+ return TRUE;
+}
unsigned int
hb_buffer_get_length (hb_buffer_t *buffer)
/* Return value valid as long as buffer not modified */
hb_glyph_info_t *
-hb_buffer_get_glyph_infos (hb_buffer_t *buffer)
+hb_buffer_get_glyph_infos (hb_buffer_t *buffer,
+ unsigned int *length)
{
+ if (length)
+ *length = buffer->len;
+
return (hb_glyph_info_t *) buffer->info;
}
/* Return value valid as long as buffer not modified */
hb_glyph_position_t *
-hb_buffer_get_glyph_positions (hb_buffer_t *buffer)
+hb_buffer_get_glyph_positions (hb_buffer_t *buffer,
+ unsigned int *length)
{
if (!buffer->have_positions)
- hb_buffer_clear_positions (buffer);
+ buffer->clear_positions ();
- return (hb_glyph_position_t *) buffer->pos;
-}
-
-
-static void
-reverse_range (hb_buffer_t *buffer,
- unsigned int start,
- unsigned int end)
-{
- unsigned int i, j;
-
- for (i = start, j = end - 1; i < j; i++, j--) {
- hb_glyph_info_t t;
-
- t = buffer->info[i];
- buffer->info[i] = buffer->info[j];
- buffer->info[j] = t;
- }
+ if (length)
+ *length = buffer->len;
- if (buffer->pos) {
- for (i = 0, j = end - 1; i < j; i++, j--) {
- hb_glyph_position_t t;
-
- t = buffer->pos[i];
- buffer->pos[i] = buffer->pos[j];
- buffer->pos[j] = t;
- }
- }
+ return (hb_glyph_position_t *) buffer->pos;
}
void
hb_buffer_reverse (hb_buffer_t *buffer)
{
- if (unlikely (!buffer->len))
- return;
-
- reverse_range (buffer, 0, buffer->len);
+ buffer->reverse ();
}
void
hb_buffer_reverse_clusters (hb_buffer_t *buffer)
{
- unsigned int i, start, count, last_cluster;
-
- if (unlikely (!buffer->len))
- return;
-
- hb_buffer_reverse (buffer);
-
- count = buffer->len;
- start = 0;
- last_cluster = buffer->info[0].cluster;
- for (i = 1; i < count; i++) {
- if (last_cluster != buffer->info[i].cluster) {
- reverse_range (buffer, start, i);
- start = i;
- last_cluster = buffer->info[i].cluster;
- }
- }
- reverse_range (buffer, start, i);
+ buffer->reverse_clusters ();
}
-
#define ADD_UTF(T) \
HB_STMT_START { \
const T *next = (const T *) text + item_offset; \
hb_codepoint_t u; \
const T *old_next = next; \
next = UTF_NEXT (next, end, u); \
- hb_buffer_add_glyph (buffer, u, 1, old_next - (const T *) text); \
+ hb_buffer_add (buffer, u, 1, old_next - (const T *) text); \
} \
} HB_STMT_END
uint8_t c = *text;
unsigned int mask, len;
- /* TODO check for overlong sequences? also: optimize? */
+ /* TODO check for overlong sequences? */
UTF8_COMPUTE (c, mask, len);
if (unlikely (!len || (unsigned int) (end - text) < len)) {
if (unlikely (c >= 0xd800 && c < 0xdc00)) {
/* high surrogate */
uint16_t l;
- if (text < end && ((l = *text), unlikely (l >= 0xdc00 && l < 0xe000))) {
+ if (text < end && ((l = *text), likely (l >= 0xdc00 && l < 0xe000))) {
/* low surrogate */
*unicode = ((hb_codepoint_t) ((c) - 0xd800) * 0x400 + (l) - 0xdc00 + 0x10000);
text++;