1 files changed, 116 insertions, 0 deletions
diff --git a/src/conversion.c b/src/conversion.c
new file mode 100644
index 0000000..af5026e
--- /dev/null
+++ b/src/conversion.c
@@ -0,0 +1,116 @@
+/* conversion.c - String conversion helper functions.
+   Copyright (C) 2000 Werner Koch (dd9jn)
+   Copyright (C) 2001, 2002, 2003, 2004, 2007 g10 Code GmbH
+ 
+   This file is part of Assuan.
+
+   Assuan 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; either version 2.1 of
+   the License, or (at your option) any later version.
+   
+   Assuan 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
+   Lesser 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, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+   02111-1307, USA.  */
+
+#if HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdlib.h>
+#include <string.h>
+/* Solaris 8 needs sys/types.h before time.h.  */
+#include <sys/types.h>
+#include <time.h>
+#include <errno.h>
+#include <ctype.h>
+
+#include "assuan-defs.h"
+#include "debug.h"
+
+
+/* Convert the number NR to a hexadecimal string.  Returns the tail
+   pointer.  */
+static char *
+_assuan_bytetohex (int nr, char *str)
+{
+  static char hexdigits[] = "0123456789abcdef";
+  int i;
+
+#define NROFHEXDIGITS 2
+  for (i = 0; i < NROFHEXDIGITS; i++)
+    {
+      int digit = (nr >> (i << 2)) & 0xf;
+      *(str++) = hexdigits[digit];
+    }
+  return str;
+}
+
+
+/* Encode the C formatted string SRC and return the malloc'ed result.  */
+char *
+_assuan_encode_c_string (assuan_context_t ctx, const char *src)
+{
+  const unsigned char *istr;
+  char *res;
+  char *ostr;
+  
+  ostr = _assuan_malloc (ctx, 4 * strlen (src) + 1);
+  if (! *ostr)
+    return NULL;
+
+  res = ostr;
+
+  for (istr = (const unsigned char *) src; *istr; istr++)
+    {
+      int c = 0;
+
+      switch (*istr)
+	{
+	case '\r':
+	  c = 'r';
+	  break;
+
+	case '\n':
+	  c = 'n';
+	  break;
+
+	case '\f':
+	  c = 'f';
+	  break;
+
+	case '\v':
+	  c = 'v';
+	  break;
+
+	case '\b':
+	  c = 'b';
+	  break;
+
+	default:
+	  if ((isascii (*istr) && isprint (*istr)) || (*istr >= 0x80))
+	    *(ostr++) = *istr;
+	  else
+	    {
+	      *(ostr++) = '\\';
+	      *(ostr++) = 'x';
+	      ostr = _assuan_bytetohex (*istr, ostr);
+	    }
+	}
+
+      if (c)
+	{
+	  *(ostr++) = '\\';
+	  *(ostr++) = c;
+	}
+    }
+  *(ostr) = '\0';
+
+  return res;
+}