kc3-lang/harfbuzz/src/hb-wasm-api-shape.hh

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• Hash : 6ff994f3
  Author :
  Date : 2023-03-03T15:33:48
  

  [wasm-api-shape] Avoid a couple of crashes
  

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• src/hb-wasm-api-shape.hh

• /*
   * 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_SHAPE_HH
  #define HB_WASM_API_SHAPE_HH
  
  #include "hb-wasm-api.hh"
  
  namespace hb {
  namespace wasm {
  
  
  static_assert (sizeof (feature_t) == sizeof (hb_feature_t), "");
  
  HB_WASM_INTERFACE (bool_t, shape_with) (HB_WASM_EXEC_ENV
  				        ptr_d(font_t, font),
  				        ptr_d(buffer_t, buffer),
  				        ptr_d(const feature_t, features),
  				        uint32_t num_features,
  					const char *shaper)
  {
    if (unlikely (0 == strcmp (shaper, "wasm")))
      return false;
  
    HB_REF2OBJ (font);
    HB_REF2OBJ (buffer);
  
    /* Pre-conditions that make hb_shape_full() crash should be checked here. */
  
    if (unlikely (!buffer->ensure_unicode ()))
      return false;
  
    if (unlikely (!HB_DIRECTION_IS_VALID (buffer->props.direction)))
      return false;
  
    HB_ARRAY_PARAM (const feature_t, features, num_features);
    if (unlikely (!features && num_features))
      return false;
  
    const char * shaper_list[] = {shaper, nullptr};
    return hb_shape_full (font, buffer,
  			(hb_feature_t *) features, num_features,
  			shaper_list);
  }
  
  
  }}
  
  #endif /* HB_WASM_API_SHAPE_HH */
  

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