1 files changed, 136 insertions, 0 deletions
diff --git a/gpgme/conversion.c b/gpgme/conversion.c
new file mode 100644
index 00000000..4029db8a
--- /dev/null
+++ b/gpgme/conversion.c
@@ -0,0 +1,136 @@
+/* conversion.c - String conversion helper functions.
+ *	Copyright (C) 2000 Werner Koch (dd9jn)
+ *      Copyright (C) 2001, 2002 g10 Code GmbH
+ *
+ * This file is part of GPGME.
+ *
+ * GPGME 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * GPGME 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+#if HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <ctype.h>
+#include "gpgme.h"
+#include "util.h"
+
+
+int
+_gpgme_hextobyte (const byte *str)
+{
+  int val = 0;
+  int i;
+
+  for (i = 0; i < 2; i++)
+    {
+      if (*str >= '0' && *str <= '9')
+	val += *str - '0';
+      else if (*str >= 'A' && *str <= 'F')
+	val += 10 + *str - 'A';
+      else if (*str >= 'a' && *str <= 'f')
+	val += 10 + *str - 'a';
+      else
+	return -1;
+      val *= 16;
+      str++;
+    }
+  return val;
+}
+
+
+GpgmeError
+_gpgme_decode_c_string (const char *src, char **destp)
+{
+  char *dest;
+
+  /* We can malloc a buffer of the same length, because the converted
+     string will never be larger.  */
+  dest = xtrymalloc (strlen (src));
+  if (!dest)
+    return mk_error (Out_Of_Core);
+
+  while (*src)
+    {
+      if (*src != '\\')
+	*(dest++) = *(src++);
+      else if (src[1] == '\\')
+	{
+	  src++;
+	  *(dest++) = *(src++); 
+        }
+      else if (src[1] == 'n')
+	{
+	  src += 2;
+	  *(dest++) = '\n'; 
+        }
+      else if (src[1] == 'r')
+	{
+	  src += 2;
+	  *(dest++) = '\r'; 
+        }
+      else if (src[1] == 'v')
+	{
+	  src += 2;
+	  *(dest++) = '\v'; 
+        }
+      else if (src[1] == 'b')
+	{
+	  src += 2;
+	  *(dest++) = '\b'; 
+        }
+      else if (src[1] == '0')
+	{
+	  /* Hmmm: no way to express this */
+	  src += 2;
+	  *(dest++) = '\\';
+	  *(dest++) = '\0'; 
+        }
+      else if (src[1] == 'x' && isxdigit (src[2]) && isxdigit (src[3]))
+	{
+	  int val = _gpgme_hextobyte (&src[2]);
+	  if (val == -1)
+	    {
+	      /* Should not happen.  */
+	      *(dest++) = *(src++);
+	      *(dest++) = *(src++);
+	      *(dest++) = *(src++);
+	      *(dest++) = *(src++);
+	    }
+	  else
+	    {
+	      if (!val)
+		{
+		  *(dest++) = '\\';
+		  *(dest++) = '\0'; 
+		}
+	      else 
+		*(byte*)dest++ = val;
+	      src += 4;
+	    }
+        }
+      else
+	{
+	  /* should not happen */
+	  src++;
+	  *(dest++) = '\\'; 
+	  *(dest++) = *(src++);
+        } 
+    }
+  *(dest++) = 0;
+  *destp = dest;
+
+  return 0;
+}