kc3-lang/harfbuzz/src/hb-number.cc

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• Hash : 61719a83
  Author :
  Date : 2023-01-20T15:52:09
  

  [hb-view] Support specifying color indices again
  

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• src/hb-number.cc

• /*
   * Copyright © 2019  Ebrahim Byagowi
   *
   *  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.
   *
   */
  
  #include "hb.hh"
  #include "hb-number.hh"
  #include "hb-number-parser.hh"
  
  template<typename T, typename Func>
  static bool
  _parse_number (const char **pp, const char *end, T *pv,
  	       bool whole_buffer, Func f)
  {
    char buf[32];
    unsigned len = hb_min (ARRAY_LENGTH (buf) - 1, (unsigned) (end - *pp));
    strncpy (buf, *pp, len);
    buf[len] = '\0';
  
    char *p = buf;
    char *pend = p;
  
    errno = 0;
    *pv = f (p, &pend);
    if (unlikely (errno || p == pend ||
  		/* Check if consumed whole buffer if is requested */
  		(whole_buffer && pend - p != end - *pp)))
      return false;
  
    *pp += pend - p;
    return true;
  }
  
  bool
  hb_parse_int (const char **pp, const char *end, int *pv, bool whole_buffer)
  {
    return _parse_number<int> (pp, end, pv, whole_buffer,
  			     [] (const char *p, char **end)
  			     { return strtol (p, end, 10); });
  }
  
  bool
  hb_parse_uint (const char **pp, const char *end, unsigned *pv,
  	       bool whole_buffer, int base)
  {
    return _parse_number<unsigned> (pp, end, pv, whole_buffer,
  				  [base] (const char *p, char **end)
  				  { return strtoul (p, end, base); });
  }
  
  bool
  hb_parse_double (const char **pp, const char *end, double *pv, bool whole_buffer)
  {
    const char *pend = end;
    *pv = strtod_rl (*pp, &pend);
    if (unlikely (*pp == pend)) return false;
    *pp = pend;
    return !whole_buffer || end == pend;
  }
  

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