sync code with last improvements from OpenBSD

app/ssh-askpass/dynlist.c

@@ -0,0 +1,82 @@
+/* dynlist.c: Dynamic lists and buffers in C.
+ * created 1999-Jan-06 15:34 jmk
+ * autodate: 2000-Aug-28 01:29
+ *
+ * by Jim Knoble <jmknoble@jmknoble.cx>
+ * Copyright (C) 1999,2000 Jim Knoble
+ *
+ * Disclaimer:
+ *
+ * The software is provided "as is", without warranty of any kind,
+ * express or implied, including but not limited to the warranties of
+ * merchantability, fitness for a particular purpose and
+ * noninfringement. In no event shall the author(s) be liable for any
+ * claim, damages or other liability, whether in an action of
+ * contract, tort or otherwise, arising from, out of or in connection
+ * with the software or the use or other dealings in the software.
+ *
+ * Permission to use, copy, modify, distribute, and sell this software
+ * and its documentation for any purpose is hereby granted without
+ * fee, provided that the above copyright notice appear in all copies
+ * and that both that copyright notice and this permission notice
+ * appear in supporting documentation.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "dynlist.h"
+
+#define LIST_CHUNK_SIZE		512
+#define BUF_CHUNK_SIZE		512
+
+/* For lists of pointers cast to char *. */
+int append_to_list(char ***list_ptr, int *list_len, int *i, char *item)
+{
+   char **tmp_ptr;
+
+   if (*i >= *list_len)
+    {
+       *list_len += LIST_CHUNK_SIZE;
+       tmp_ptr = realloc(*list_ptr, (sizeof(**list_ptr) * *list_len));
+       if (NULL == tmp_ptr)
+	{
+	   free(*list_ptr);
+	   *list_ptr = NULL;
+	   return(APPEND_FAILURE);
+	} else {
+	   *list_ptr = tmp_ptr;
+	}
+       *list_ptr = tmp_ptr;
+    }
+   (*list_ptr)[*i] = item;
+   (*i)++;
+   return(APPEND_SUCCESS);
+}
+
+/* For single-dimensional buffers. */
+int append_to_buf(char **buf, int *buflen, int *i, int c)
+{
+   char *tmp_buf;
+
+   if (*i >= *buflen)
+    {
+       *buflen += BUF_CHUNK_SIZE;
+       tmp_buf = realloc(*buf, (sizeof(**buf) * *buflen));
+       if (NULL == tmp_buf)
+	{
+	   free(*buf);
+	   *buf = NULL;
+	   return(APPEND_FAILURE);
+	} else {
+	   *buf = tmp_buf;
+	}
+       *buf = tmp_buf;
+#ifdef DEBUG
+       printf("-->Allocated buffer of size %d\n", *buflen);
+#endif /* DEBUG */
+    }
+   (*buf)[*i] = (char) c;
+   (*i)++;
+   return(APPEND_SUCCESS);
+}