1 files changed, 104 insertions, 0 deletions
diff --git a/src/dstring.c b/src/dstring.c
new file mode 100644
index 0000000..6ff75bf
--- /dev/null
+++ b/src/dstring.c
@@ -0,0 +1,104 @@
+/* dstring.c - The dynamic string handling routines used by cpio.
+   Copyright (C) 1990, 1991, 1992, 2004, 2007, 2010 Free Software
+   Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   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 General Public
+   License along with this program; if not, write to the Free
+   Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02110-1301 USA.  */
+
+#if defined(HAVE_CONFIG_H)
+# include <config.h>
+#endif
+
+#include <stdio.h>
+#if defined(HAVE_STRING_H) || defined(STDC_HEADERS)
+#include <string.h>
+#else
+#include <strings.h>
+#endif
+#include "dstring.h"
+
+char *xmalloc (unsigned n);
+char *xrealloc (char *p, unsigned n);
+
+/* Initialiaze dynamic string STRING with space for SIZE characters.  */
+
+void
+ds_init (dynamic_string *string, int size)
+{
+  string->ds_length = size;
+  string->ds_string = (char *) xmalloc (size);
+}
+
+/* Expand dynamic string STRING, if necessary, to hold SIZE characters.  */
+
+void
+ds_resize (dynamic_string *string, int size)
+{
+  if (size > string->ds_length)
+    {
+      string->ds_length = size;
+      string->ds_string = (char *) xrealloc ((char *) string->ds_string, size);
+    }
+}
+
+/* Dynamic string S gets a string terminated by the EOS character
+   (which is removed) from file F.  S will increase
+   in size during the function if the string from F is longer than
+   the current size of S.
+   Return NULL if end of file is detected.  Otherwise,
+   Return a pointer to the null-terminated string in S.  */
+
+char *
+ds_fgetstr (FILE *f, dynamic_string *s, char eos)
+{
+  int insize;			/* Amount needed for line.  */
+  int strsize;			/* Amount allocated for S.  */
+  int next_ch;
+
+  /* Initialize.  */
+  insize = 0;
+  strsize = s->ds_length;
+
+  /* Read the input string.  */
+  next_ch = getc (f);
+  while (next_ch != eos && next_ch != EOF)
+    {
+      if (insize >= strsize - 1)
+	{
+	  ds_resize (s, strsize * 2 + 2);
+	  strsize = s->ds_length;
+	}
+      s->ds_string[insize++] = next_ch;
+      next_ch = getc (f);
+    }
+  s->ds_string[insize++] = '\0';
+
+  if (insize == 1 && next_ch == EOF)
+    return NULL;
+  else
+    return s->ds_string;
+}
+
+char *
+ds_fgets (FILE *f, dynamic_string *s)
+{
+  return ds_fgetstr (f, s, '\n');
+}
+
+char *
+ds_fgetname (FILE *f, dynamic_string *s)
+{
+  return ds_fgetstr (f, s, '\0');
+}