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/*
* Copyright © 2023 Behdad Esfahbod
*
* 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.
*/
#ifndef HB_WASM_API_BUFFER_HH
#define HB_WASM_API_BUFFER_HH
#include "hb-wasm-api.hh"
#include "hb-buffer.hh"
namespace hb {
namespace wasm {
static_assert (sizeof (glyph_info_t) == sizeof (hb_glyph_info_t), "");
static_assert (sizeof (glyph_position_t) == sizeof (hb_glyph_position_t), "");
HB_WASM_API (bool_t, buffer_contents_realloc) (HB_WASM_EXEC_ENV
ptr_d(buffer_contents_t, contents),
uint32_t size)
{
HB_PTR_PARAM (buffer_contents_t, contents);
if (unlikely (!contents))
return false;
if (size <= contents->length)
return true;
unsigned bytes;
if (hb_unsigned_mul_overflows (size, sizeof (glyph_info_t), &bytes))
return false;
glyph_info_t *info = HB_ARRAY_APP2NATIVE (glyph_info_t, contents->info, contents->length);
glyph_position_t *pos = HB_ARRAY_APP2NATIVE (glyph_position_t, contents->pos, contents->length);
if (unlikely (!info || !pos))
return false;
glyph_info_t *new_info = nullptr;
uint32_t new_inforef = module_malloc (bytes, (void **) &new_info);
glyph_position_t *new_pos = nullptr;
uint32_t new_posref = module_malloc (bytes, (void **) &new_pos);
unsigned old_bytes = contents->length * sizeof (glyph_info_t);
if (likely (new_inforef))
{
hb_memcpy (new_info, info, old_bytes);
module_free (contents->info);
contents->info = new_inforef;
}
if (likely (new_posref))
{
hb_memcpy (new_pos, pos, old_bytes);
module_free (contents->pos);
contents->pos = new_posref;
}
if (likely (new_info && new_pos))
{
contents->length = size;
return true;
}
return false;
}
HB_WASM_API (void, buffer_contents_free) (HB_WASM_EXEC_ENV
ptr_d(buffer_contents_t, contents))
{
HB_PTR_PARAM (buffer_contents_t, contents);
if (unlikely (!contents))
return;
module_free (contents->info);
module_free (contents->pos);
contents->info = nullref;
contents->pos = nullref;
contents->length = 0;
}
HB_WASM_API (bool_t, buffer_copy_contents) (HB_WASM_EXEC_ENV
ptr_d(buffer_t, buffer),
ptr_d(buffer_contents_t, contents))
{
HB_REF2OBJ (buffer);
HB_PTR_PARAM (buffer_contents_t, contents);
if (unlikely (!contents))
return false;
if (buffer->have_output)
buffer->sync ();
if (!buffer->have_positions)
buffer->clear_positions ();
unsigned length = buffer->len;
if (length <= contents->length)
{
glyph_info_t *info = HB_ARRAY_APP2NATIVE (glyph_info_t, contents->info, length);
glyph_position_t *pos = HB_ARRAY_APP2NATIVE (glyph_position_t, contents->pos, length);
if (unlikely (!info || !pos))
{
contents->length = 0;
return false;
}
unsigned bytes = length * sizeof (hb_glyph_info_t);
hb_memcpy (info, buffer->info, bytes);
hb_memcpy (pos, buffer->pos, bytes);
return true;
}
module_free (contents->info);
module_free (contents->pos);
contents->length = length;
unsigned bytes = length * sizeof (hb_glyph_info_t);
contents->info = wasm_runtime_module_dup_data (module_inst, (const char *) buffer->info, bytes);
contents->pos = wasm_runtime_module_dup_data (module_inst, (const char *) buffer->pos, bytes);
if (length && (!contents->info || !contents->pos))
{
contents->length = 0;
return false;
}
return true;
}
HB_WASM_API (bool_t, buffer_set_contents) (HB_WASM_EXEC_ENV
ptr_d(buffer_t, buffer),
ptr_d(const buffer_contents_t, contents))
{
HB_REF2OBJ (buffer);
HB_PTR_PARAM (buffer_contents_t, contents);
if (unlikely (!contents))
return false;
unsigned length = contents->length;
unsigned bytes;
if (unlikely (hb_unsigned_mul_overflows (length, sizeof (buffer->info[0]), &bytes)))
return false;
if (unlikely (!buffer->resize (length)))
return false;
glyph_info_t *info = (glyph_info_t *) (validate_app_addr (contents->info, bytes) ? addr_app_to_native (contents->info) : nullptr);
glyph_position_t *pos = (glyph_position_t *) (validate_app_addr (contents->pos, bytes) ? addr_app_to_native (contents->pos) : nullptr);
if (!buffer->have_positions)
buffer->clear_positions (); /* This is wasteful. */
hb_memcpy (buffer->info, info, bytes);
hb_memcpy (buffer->pos, pos, bytes);
buffer->len = length;
return true;
}
HB_WASM_API (direction_t, buffer_get_direction) (HB_WASM_EXEC_ENV
ptr_d(buffer_t, buffer))
{
HB_REF2OBJ (buffer);
return (direction_t) hb_buffer_get_direction (buffer);
}
HB_WASM_API (script_t, buffer_get_script) (HB_WASM_EXEC_ENV
ptr_d(buffer_t, buffer))
{
HB_REF2OBJ (buffer);
return hb_script_to_iso15924_tag (hb_buffer_get_script (buffer));
}
HB_WASM_API (void, buffer_reverse) (HB_WASM_EXEC_ENV
ptr_d(buffer_t, buffer))
{
HB_REF2OBJ (buffer);
hb_buffer_reverse (buffer);
}
HB_WASM_API (void, buffer_reverse_clusters) (HB_WASM_EXEC_ENV
ptr_d(buffer_t, buffer))
{
HB_REF2OBJ (buffer);
hb_buffer_reverse_clusters (buffer);
}
}}
#endif /* HB_WASM_API_BUFFER_HH */
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