/*
- * 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"
#include <string.h>
+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:
*
- * There are two string pointers: in_string and out_string. They
- * always have same allocated size, but different length and positions.
+ * There are two info pointers: info and out_info. They always have
+ * the same allocated size, but different lengths.
*
- * As an optimization, both in_string and out_string may point to the
- * same piece of memory, which is owned by in_string. This remains the
- * case as long as out_length doesn't exceed in_length at any time.
- * In that case, swap() is no-op and the glyph operations operate mostly
- * in-place.
+ * 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 i at any time.
+ * In that case, swap_buffers() is no-op and the glyph operations operate
+ * mostly in-place.
*
- * As soon as out_string gets longer than in_string, out_string is moved over
- * to an alternate buffer (which we reuse the positions buffer for!), and its
- * current contents (out_length entries) are copied to the alt buffer.
- * This should all remain transparent to the user. swap() then switches
- * in_string and out_string.
+ * 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_buffers() then
+ * switches info and out_info.
*/
-/* XXX err handling */
+
/* Internal API */
-static void
-hb_buffer_ensure_separate (hb_buffer_t *buffer, unsigned int size)
+bool
+hb_buffer_t::enlarge (unsigned int size)
{
- hb_buffer_ensure (buffer, size);
- if (buffer->out_string == buffer->in_string)
- {
- assert (buffer->have_output);
- if (!buffer->positions)
- buffer->positions = (hb_internal_glyph_position_t *) calloc (buffer->allocated, sizeof (buffer->positions[0]));
+ if (unlikely (in_error))
+ return FALSE;
- buffer->out_string = (hb_internal_glyph_info_t *) buffer->positions;
- memcpy (buffer->out_string, buffer->in_string, buffer->out_length * sizeof (buffer->out_string[0]));
- }
-}
+ 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;
-/* Public API */
+ if (unlikely (_hb_unsigned_int_mul_overflows (size, sizeof (info[0]))))
+ goto done;
-hb_buffer_t *
-hb_buffer_create (unsigned int pre_alloc_size)
-{
- hb_buffer_t *buffer;
+ while (size > new_allocated)
+ new_allocated += (new_allocated >> 1) + 32;
- if (!HB_OBJECT_DO_CREATE (hb_buffer_t, buffer))
- return &_hb_buffer_nil;
+ ASSERT_STATIC (sizeof (info[0]) == sizeof (pos[0]));
+ if (unlikely (_hb_unsigned_int_mul_overflows (new_allocated, sizeof (info[0]))))
+ goto done;
- if (pre_alloc_size)
- hb_buffer_ensure(buffer, pre_alloc_size);
+ 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]));
- buffer->unicode = &_hb_unicode_funcs_nil;
+done:
+ if (unlikely (!new_pos || !new_info))
+ in_error = TRUE;
- return buffer;
-}
+ if (likely (new_pos))
+ pos = new_pos;
-hb_buffer_t *
-hb_buffer_reference (hb_buffer_t *buffer)
-{
- HB_OBJECT_DO_REFERENCE (buffer);
-}
+ if (likely (new_info))
+ info = new_info;
-unsigned int
-hb_buffer_get_reference_count (hb_buffer_t *buffer)
-{
- HB_OBJECT_DO_GET_REFERENCE_COUNT (buffer);
+ out_info = separate_out ? (hb_glyph_info_t *) pos : info;
+ if (likely (!in_error))
+ allocated = new_allocated;
+
+ return likely (!in_error);
}
-void
-hb_buffer_destroy (hb_buffer_t *buffer)
+bool
+hb_buffer_t::make_room_for (unsigned int num_in,
+ unsigned int num_out)
{
- HB_OBJECT_DO_DESTROY (buffer);
+ if (unlikely (!ensure (out_len + num_out))) return FALSE;
- hb_unicode_funcs_destroy (buffer->unicode);
+ if (out_info == info &&
+ out_len + num_out > idx + num_in)
+ {
+ assert (have_output);
- free (buffer->in_string);
- free (buffer->positions);
+ out_info = (hb_glyph_info_t *) pos;
+ memcpy (out_info, info, out_len * sizeof (out_info[0]));
+ }
- free (buffer);
+ return TRUE;
}
+/* HarfBuzz-Internal API */
+
void
-hb_buffer_set_unicode_funcs (hb_buffer_t *buffer,
- hb_unicode_funcs_t *unicode)
+hb_buffer_t::reset (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;
+ hb_unicode_funcs_destroy (unicode);
+ unicode = _hb_buffer_nil.unicode;
+
+ props = _hb_buffer_nil.props;
+
+ in_error = FALSE;
+ have_output = FALSE;
+ have_positions = FALSE;
+
+ idx = 0;
+ len = 0;
+ out_len = 0;
+
+ serial = 0;
+ memset (allocated_var_bytes, 0, sizeof allocated_var_bytes);
+ memset (allocated_var_owner, 0, sizeof allocated_var_owner);
+
+ out_info = info;
}
-hb_unicode_funcs_t *
-hb_buffer_get_unicode_funcs (hb_buffer_t *buffer)
+void
+hb_buffer_t::add (hb_codepoint_t codepoint,
+ hb_mask_t mask,
+ unsigned int cluster)
{
- return buffer->unicode;
+ hb_glyph_info_t *glyph;
+
+ if (unlikely (!ensure (len + 1))) return;
+
+ glyph = &info[len];
+
+ memset (glyph, 0, sizeof (*glyph));
+ glyph->codepoint = codepoint;
+ glyph->mask = mask;
+ glyph->cluster = cluster;
+
+ len++;
}
void
-hb_buffer_set_direction (hb_buffer_t *buffer,
- hb_direction_t direction)
-
+hb_buffer_t::clear_output (void)
{
- buffer->direction = direction;
+ if (unlikely (hb_object_is_inert (this)))
+ return;
+
+ have_output = TRUE;
+ have_positions = FALSE;
+
+ out_len = 0;
+ out_info = info;
}
-hb_direction_t
-hb_buffer_get_direction (hb_buffer_t *buffer)
+void
+hb_buffer_t::clear_positions (void)
{
- return buffer->direction;
+ if (unlikely (hb_object_is_inert (this)))
+ return;
+
+ 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->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->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->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->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_length = 0;
- buffer->out_length = 0;
- buffer->in_pos = 0;
- buffer->out_pos = 0;
- buffer->out_string = buffer->in_string;
- buffer->max_lig_id = 0;
+ out_info[out_len] = info[idx];
+ out_info[out_len].codepoint = glyph_index;
+
+ idx++;
+ out_len++;
}
void
-hb_buffer_ensure (hb_buffer_t *buffer, unsigned int size)
+hb_buffer_t::next_glyph (void)
{
- unsigned int new_allocated = buffer->allocated;
-
- if (size > new_allocated)
+ if (have_output)
{
- while (size > new_allocated)
- new_allocated += (new_allocated >> 1) + 8;
-
- if (buffer->positions)
- buffer->positions = (hb_internal_glyph_position_t *) realloc (buffer->positions, new_allocated * sizeof (buffer->positions[0]));
-
- if (buffer->out_string != buffer->in_string)
+ if (out_info != info)
{
- buffer->in_string = (hb_internal_glyph_info_t *) realloc (buffer->in_string, new_allocated * sizeof (buffer->in_string[0]));
- buffer->out_string = (hb_internal_glyph_info_t *) buffer->positions;
- }
- else
- {
- buffer->in_string = (hb_internal_glyph_info_t *) realloc (buffer->in_string, new_allocated * sizeof (buffer->in_string[0]));
- buffer->out_string = buffer->in_string;
+ if (unlikely (!ensure (out_len + 1))) return;
+ out_info[out_len] = info[idx];
}
+ else if (out_len != idx)
+ out_info[out_len] = info[idx];
- buffer->allocated = new_allocated;
+ 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_internal_glyph_info_t *glyph;
+ hb_mask_t not_mask = ~mask;
+ value &= mask;
- hb_buffer_ensure (buffer, buffer->in_length + 1);
+ if (!mask)
+ return;
- glyph = &buffer->in_string[buffer->in_length];
- 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->in_length++;
+ 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_t::reverse_range (unsigned int start,
+ unsigned int end)
+{
+ unsigned int i, j;
-/* HarfBuzz-Internal API */
+ 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;
+ }
+
+ if (pos) {
+ for (i = start, j = end - 1; i < j; i++, j--) {
+ hb_glyph_position_t t;
+
+ 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_length = 0;
- buffer->out_pos = 0;
- buffer->out_string = buffer->in_string;
+ if (unlikely (!len))
+ return;
+
+ reverse_range (0, len);
}
void
-hb_buffer_clear_positions (hb_buffer_t *buffer)
+hb_buffer_t::reverse_clusters (void)
{
- _hb_buffer_clear_output (buffer);
- buffer->have_output = FALSE;
- buffer->have_positions = TRUE;
+ unsigned int i, start, count, last_cluster;
- if (unlikely (!buffer->positions))
- {
- buffer->positions = (hb_internal_glyph_position_t *) calloc (buffer->allocated, sizeof (buffer->positions[0]));
+ if (unlikely (!len))
return;
+
+ reverse ();
+
+ 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);
+}
- memset (buffer->positions, 0, sizeof (buffer->positions[0]) * buffer->in_length);
+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);
}
-void
-_hb_buffer_swap (hb_buffer_t *buffer)
+void hb_buffer_t::allocate_var (unsigned int byte_i, unsigned int count, const char *owner)
{
- unsigned int tmp;
+ assert (byte_i < 8 && byte_i + count <= 8);
- assert (buffer->have_output);
+ 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);
- if (buffer->out_string != buffer->in_string)
- {
- hb_internal_glyph_info_t *tmp_string;
- tmp_string = buffer->in_string;
- buffer->in_string = buffer->out_string;
- buffer->out_string = tmp_string;
- buffer->positions = (hb_internal_glyph_position_t *) buffer->out_string;
+ 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_t::deallocate_var (unsigned int byte_i, unsigned int count, const char *owner)
+{
+ if (DEBUG (BUFFER))
+ dump_var_allocation (this);
- tmp = buffer->in_length;
- buffer->in_length = buffer->out_length;
- buffer->out_length = tmp;
+ DEBUG_MSG (BUFFER, this,
+ "Deallocating var bytes %d..%d for %s",
+ byte_i, byte_i + count - 1, owner);
- tmp = buffer->in_pos;
- buffer->in_pos = buffer->out_pos;
- buffer->out_pos = tmp;
+ 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]--;
+ }
}
-/* The following function copies `num_out' elements from `glyph_data'
- to `buffer->out_string', advancing the in array pointer in the structure
- by `num_in' elements, and the out array pointer by `num_out' elements.
- Finally, it sets the `length' field of `out' equal to
- `pos' of the `out' structure.
+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));
+}
- If `component' is 0xFFFF, the component value from buffer->in_pos
- will copied `num_out' times, otherwise `component' itself will
- be used to fill the `component' fields.
+/* Public API */
- If `lig_id' is 0xFFFF, the lig_id value from buffer->in_pos
- will copied `num_out' times, otherwise `lig_id' itself will
- be used to fill the `lig_id' fields.
+hb_buffer_t *
+hb_buffer_create (unsigned int pre_alloc_size)
+{
+ hb_buffer_t *buffer;
- The mask for all replacement glyphs are taken
- from the glyph at position `buffer->in_pos'.
+ if (!(buffer = hb_object_create<hb_buffer_t> ()))
+ return &_hb_buffer_nil;
- The cluster value for the glyph at position buffer->in_pos is used
- for all replacement glyphs */
+ buffer->reset ();
-void
-_hb_buffer_add_output_glyphs (hb_buffer_t *buffer,
- unsigned int num_in,
- unsigned int num_out,
- const hb_codepoint_t *glyph_data,
- unsigned short component,
- unsigned short lig_id)
-{
- unsigned int i;
- unsigned int mask;
- unsigned int cluster;
-
- if (buffer->out_string != buffer->in_string ||
- buffer->out_pos + num_out > buffer->in_pos + num_in)
- {
- hb_buffer_ensure_separate (buffer, buffer->out_pos + num_out);
+ if (pre_alloc_size && !buffer->ensure (pre_alloc_size)) {
+ hb_buffer_destroy (buffer);
+ return &_hb_buffer_nil;
}
- mask = buffer->in_string[buffer->in_pos].mask;
- cluster = buffer->in_string[buffer->in_pos].cluster;
- if (component == 0xFFFF)
- component = buffer->in_string[buffer->in_pos].component;
- if (lig_id == 0xFFFF)
- lig_id = buffer->in_string[buffer->in_pos].lig_id;
+ return buffer;
+}
- for (i = 0; i < num_out; i++)
- {
- hb_internal_glyph_info_t *info = &buffer->out_string[buffer->out_pos + i];
- info->codepoint = glyph_data[i];
- info->mask = mask;
- info->cluster = cluster;
- info->component = component;
- info->lig_id = lig_id;
- info->gproperty = HB_BUFFER_GLYPH_PROPERTIES_UNKNOWN;
- }
+hb_buffer_t *
+hb_buffer_get_empty (void)
+{
+ return &_hb_buffer_nil;
+}
- buffer->in_pos += num_in;
- buffer->out_pos += num_out;
- buffer->out_length = buffer->out_pos;
+hb_buffer_t *
+hb_buffer_reference (hb_buffer_t *buffer)
+{
+ return hb_object_reference (buffer);
}
void
-_hb_buffer_add_output_glyphs_be16 (hb_buffer_t *buffer,
- unsigned int num_in,
- unsigned int num_out,
- const uint16_t *glyph_data_be,
- unsigned short component,
- unsigned short lig_id)
-{
- unsigned int i;
- unsigned int mask;
- unsigned int cluster;
-
- if (buffer->out_string != buffer->in_string ||
- buffer->out_pos + num_out > buffer->in_pos + num_in)
- {
- hb_buffer_ensure_separate (buffer, buffer->out_pos + num_out);
- }
+hb_buffer_destroy (hb_buffer_t *buffer)
+{
+ if (!hb_object_destroy (buffer)) return;
- mask = buffer->in_string[buffer->in_pos].mask;
- cluster = buffer->in_string[buffer->in_pos].cluster;
- if (component == 0xFFFF)
- component = buffer->in_string[buffer->in_pos].component;
- if (lig_id == 0xFFFF)
- lig_id = buffer->in_string[buffer->in_pos].lig_id;
+ hb_unicode_funcs_destroy (buffer->unicode);
- for (i = 0; i < num_out; i++)
- {
- hb_internal_glyph_info_t *info = &buffer->out_string[buffer->out_pos + i];
- info->codepoint = hb_be_uint16 (glyph_data_be[i]);
- info->mask = mask;
- info->cluster = cluster;
- info->component = component;
- info->lig_id = lig_id;
- info->gproperty = HB_BUFFER_GLYPH_PROPERTIES_UNKNOWN;
- }
+ free (buffer->info);
+ free (buffer->pos);
- buffer->in_pos += num_in;
- buffer->out_pos += num_out;
- buffer->out_length = buffer->out_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);
+}
+
+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_add_output_glyph (hb_buffer_t *buffer,
- hb_codepoint_t glyph_index,
- unsigned short component,
- unsigned short lig_id)
+hb_buffer_set_unicode_funcs (hb_buffer_t *buffer,
+ hb_unicode_funcs_t *unicode)
{
- hb_internal_glyph_info_t *info;
+ if (unlikely (hb_object_is_inert (buffer)))
+ return;
- if (buffer->out_string != buffer->in_string)
- {
- hb_buffer_ensure (buffer, buffer->out_pos + 1);
- buffer->out_string[buffer->out_pos] = buffer->in_string[buffer->in_pos];
- }
- else if (buffer->out_pos != buffer->in_pos)
- buffer->out_string[buffer->out_pos] = buffer->in_string[buffer->in_pos];
+ if (!unicode)
+ unicode = _hb_buffer_nil.unicode;
- info = &buffer->out_string[buffer->out_pos];
- info->codepoint = glyph_index;
- if (component != 0xFFFF)
- info->component = component;
- if (lig_id != 0xFFFF)
- info->lig_id = lig_id;
- info->gproperty = HB_BUFFER_GLYPH_PROPERTIES_UNKNOWN;
+ hb_unicode_funcs_reference (unicode);
+ hb_unicode_funcs_destroy (buffer->unicode);
+ buffer->unicode = unicode;
+}
- buffer->in_pos++;
- buffer->out_pos++;
- buffer->out_length = buffer->out_pos;
+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_string != buffer->in_string)
- {
- hb_buffer_ensure (buffer, buffer->out_pos + 1);
- buffer->out_string[buffer->out_pos] = buffer->in_string[buffer->in_pos];
- }
- else if (buffer->out_pos != buffer->in_pos)
- buffer->out_string[buffer->out_pos] = buffer->in_string[buffer->in_pos];
+ if (unlikely (hb_object_is_inert (buffer)))
+ return;
- buffer->out_pos++;
- buffer->out_length = buffer->out_pos;
- }
+ buffer->props.direction = direction;
+}
- buffer->in_pos++;
+hb_direction_t
+hb_buffer_get_direction (hb_buffer_t *buffer)
+{
+ return buffer->props.direction;
}
+void
+hb_buffer_set_script (hb_buffer_t *buffer,
+ hb_script_t script)
+{
+ if (unlikely (hb_object_is_inert (buffer)))
+ return;
-unsigned int
-hb_buffer_get_length (hb_buffer_t *buffer)
+ buffer->props.script = script;
+}
+
+hb_script_t
+hb_buffer_get_script (hb_buffer_t *buffer)
{
- return buffer->in_length;
+ return buffer->props.script;
}
-/* Return value valid as long as buffer not modified */
-hb_glyph_info_t *
-hb_buffer_get_glyph_infos (hb_buffer_t *buffer)
+void
+hb_buffer_set_language (hb_buffer_t *buffer,
+ hb_language_t language)
{
- return (hb_glyph_info_t *) buffer->in_string;
+ if (unlikely (hb_object_is_inert (buffer)))
+ return;
+
+ buffer->props.language = language;
}
-/* Return value valid as long as buffer not modified */
-hb_glyph_position_t *
-hb_buffer_get_glyph_positions (hb_buffer_t *buffer)
+hb_language_t
+hb_buffer_get_language (hb_buffer_t *buffer)
{
- if (!buffer->have_positions)
- hb_buffer_clear_positions (buffer);
+ return buffer->props.language;
+}
+
- return (hb_glyph_position_t *) buffer->positions;
+void
+hb_buffer_reset (hb_buffer_t *buffer)
+{
+ buffer->reset ();
}
+hb_bool_t
+hb_buffer_pre_allocate (hb_buffer_t *buffer, unsigned int size)
+{
+ return buffer->ensure (size);
+}
-static void
-reverse_range (hb_buffer_t *buffer,
- unsigned int start,
- unsigned int end)
+hb_bool_t
+hb_buffer_allocation_successful (hb_buffer_t *buffer)
{
- unsigned int i, j;
+ return !buffer->in_error;
+}
- for (i = start, j = end - 1; i < j; i++, j--) {
- hb_internal_glyph_info_t t;
+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;
- t = buffer->in_string[i];
- buffer->in_string[i] = buffer->in_string[j];
- buffer->in_string[j] = t;
+ /* 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));
}
- if (buffer->positions) {
- for (i = 0, j = end - 1; i < j; i++, j--) {
- hb_internal_glyph_position_t t;
+ buffer->len = length;
+ return TRUE;
+}
- t = buffer->positions[i];
- buffer->positions[i] = buffer->positions[j];
- buffer->positions[j] = t;
- }
- }
+unsigned int
+hb_buffer_get_length (hb_buffer_t *buffer)
+{
+ return buffer->len;
}
-void
-hb_buffer_reverse (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,
+ unsigned int *length)
{
- if (unlikely (!buffer->in_length))
- return;
+ if (length)
+ *length = buffer->len;
- reverse_range (buffer, 0, buffer->in_length);
+ return (hb_glyph_info_t *) buffer->info;
}
-void
-hb_buffer_reverse_clusters (hb_buffer_t *buffer)
+/* Return value valid as long as buffer not modified */
+hb_glyph_position_t *
+hb_buffer_get_glyph_positions (hb_buffer_t *buffer,
+ unsigned int *length)
{
- unsigned int i, start, count, last_cluster;
+ if (!buffer->have_positions)
+ buffer->clear_positions ();
- if (unlikely (!buffer->in_length))
- return;
+ if (length)
+ *length = buffer->len;
- hb_buffer_reverse (buffer);
+ return (hb_glyph_position_t *) buffer->pos;
+}
- count = buffer->in_length;
- start = 0;
- last_cluster = buffer->in_string[0].cluster;
- for (i = 1; i < count; i++) {
- if (last_cluster != buffer->in_string[i].cluster) {
- reverse_range (buffer, start, i);
- start = i;
- last_cluster = buffer->in_string[i].cluster;
- }
- }
- reverse_range (buffer, start, i);
+void
+hb_buffer_reverse (hb_buffer_t *buffer)
+{
+ buffer->reverse ();
}
+void
+hb_buffer_reverse_clusters (hb_buffer_t *buffer)
+{
+ buffer->reverse_clusters ();
+}
#define ADD_UTF(T) \
HB_STMT_START { \
hb_codepoint_t u; \
const T *old_next = next; \
next = UTF_NEXT (next, end, u); \
- hb_buffer_add_glyph (buffer, u, 0, 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? */
+
UTF8_COMPUTE (c, mask, len);
if (unlikely (!len || (unsigned int) (end - text) < len)) {
*unicode = -1;
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++;
ADD_UTF (uint32_t);
#undef UTF_NEXT
}
+
+
+HB_END_DECLS