mailinfo: unescape quoted-pair in header fields

diff --git a/cache.h b/cache.h
index b780a91a567143ca2cd1283dd441dcc0e00673d4..b0dae4bac1a1c22035b175a43c9fe436e789f5d7 100644 (file)
--- a/cache.h
+++ b/cache.h
@@ -1139,6 +1139,16 @@ static inline unsigned int hexval(unsigned char c)
        return hexval_table[c];
 }
 
+/*
+ * Convert two consecutive hexadecimal digits into a char.  Return a
+ * negative value on error.  Don't run over the end of short strings.
+ */
+static inline int hex2chr(const char *s)
+{
+       int val = hexval(s[0]);
+       return (val < 0) ? val : (val << 4) | hexval(s[1]);
+}
+
 /* Convert to/from hex/sha1 representation */
 #define MINIMUM_ABBREV minimum_abbrev
 #define DEFAULT_ABBREV default_abbrev