add a lib for rendering text in sdl2 and rules to make in makefile

SDL2_ttf/external/harfbuzz/util/batch.hh

@@ -0,0 +1,75 @@
+/*
+ * 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