1 files changed, 66 insertions, 0 deletions
diff --git a/src/constraint_handler.c b/src/constraint_handler.c
new file mode 100644
index 0000000..ca4e9d2
--- /dev/null
+++ b/src/constraint_handler.c
@@ -0,0 +1,66 @@
+/* constraint_handler.c
+ *
+ * Copyright 2024 axtlos <axtlos@disroot.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: LGPL-3.0-only
+ */
+
+
+#define __STDC_WANT_LIB_EXT1__ 1
+#include "extlib.h"
+
+static constraint_handler_t *_cnstrnt_handler = NULL;
+
+constraint_handler_t
+set_constraint_handler_s (constraint_handler_t handler)
+{
+  constraint_handler_t *new, *old, ret;
+
+  new = malloc (sizeof (constraint_handler_t));
+  if (!new) return NULL;
+  *new = handler;
+  old = _cnstrnt_handler;
+  _cnstrnt_handler = new;
+  if (!old)
+    ret = NULL;
+  else {
+    ret = *old;
+    free (old);
+  }
+  return ret;
+}
+
+void
+throw_constraint_handler_s (const char * restrict msg, errno_t error)
+{
+  constraint_handler_t ch;
+  ch = _cnstrnt_handler != NULL ? *_cnstrnt_handler : NULL;
+  if (ch != NULL)
+    ch (msg, NULL, error);
+}
+
+void
+abort_handler_s (const char *restrict msg, void * restrict ptr, errno_t error)
+{
+  static const char abrt_msg[] = "abort_handler: ";
+
+  fprintf (stderr, "%s", abrt_msg);
+  fprintf (stderr, "%s\n", msg);
+  abort ();
+}
+
+void
+ignore_handler_s (const char * restrict msg, void * restrict ptr, errno_t error)
+{}