dovecot-2.0: Added base64_is_valid_char()

[dovecot at dovecot.org]

details:   http://hg.dovecot.org/dovecot-2.0/rev/0078f598d1fc
changeset: 12253:0078f598d1fc
user:      Timo Sirainen <tss at iki.fi>
date:      Mon Aug 23 19:03:16 2010 +0100
description:
Added base64_is_valid_char()

diffstat:

 src/lib/base64.c |  5 +++++
 src/lib/base64.h |  3 +++
 2 files changed, 8 insertions(+), 0 deletions(-)

diffs (25 lines):

diff -r 8292084314be -r 0078f598d1fc src/lib/base64.c
--- a/src/lib/base64.c	Fri Aug 13 18:49:06 2010 +0100
+++ b/src/lib/base64.c	Mon Aug 23 19:03:16 2010 +0100
@@ -159,3 +159,8 @@
 	(void)base64_decode(str, len, NULL, buf);
 	return buf;
 }
+
+bool base64_is_valid_char(char c)
+{
+	return b64dec[(uint8_t)c] != 0xff;
+}
diff -r 8292084314be -r 0078f598d1fc src/lib/base64.h
--- a/src/lib/base64.h	Fri Aug 13 18:49:06 2010 +0100
+++ b/src/lib/base64.h	Mon Aug 23 19:03:16 2010 +0100
@@ -20,6 +20,9 @@
 /* Decode given string to a buffer allocated from data stack. */
 buffer_t *t_base64_decode_str(const char *str);
 
+/* Returns TRUE if c is a valid base64 encoding character (excluding '=') */
+bool base64_is_valid_char(char c);
+
 /* max. buffer size required for base64_encode() */
 #define MAX_BASE64_ENCODED_SIZE(size) \
 	((size) / 3 * 4 + 2+2)