kc3-lang/harfbuzz/util/batch.hh

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• Author : Behdad Esfahbod
  Date : 2021-08-29 09:44:52
  Hash : fdce2941
  Message : [util/hb-subset] Print error and suggest filing github issue if operation fails https://github.com/harfbuzz/harfbuzz/issues/3173#issuecomment-906715780

• util/batch.hh

• /*
   * Copyright © 2021  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 BATCH_HH
  #define BATCH_HH
  
  #include "options.hh"
  
  typedef int (*main_func_t) (int argc, char **argv);
  
  template <typename main_t, bool report_status=false>
  int
  batch_main (int argc, char **argv)
  {
    if (argc == 2 && !strcmp (argv[1], "--batch"))
    {
      int ret = 0;
      char buf[4092];
      while (fgets (buf, sizeof (buf), stdin))
      {
        size_t l = strlen (buf);
        if (l && buf[l - 1] == '\n') buf[l - 1] = '\0';
  
        char *args[64];
        argc = 0;
        args[argc++] = argv[0];
        char *p = buf, *e;
        args[argc++] = p;
        while ((e = strchr (p, ';')) && argc < (int) ARRAY_LENGTH (args))
        {
  	*e++ = '\0';
  	while (*e == ';')
  	  e++;
  	args[argc++] = p = e;
        }
  
        int result = main_t () (argc, args);
  
        if (report_status)
  	fprintf (stdout, result == 0 ? "success\n" : "failure\n");
        fflush (stdout);
  
        ret = MAX (ret, result);
      }
      return ret;
    }
  
    int ret = main_t () (argc, argv);
    if (report_status && ret != 0)
      fprintf (stdout, "error: Operation failed. Probably a bug. File github issue.\n");
    return ret;
  }
  
  #endif