From 9753614742f16b34df76d2c4d09d16cc93edd3dc Mon Sep 17 00:00:00 2001
From: "Steffen (Daode) Nurpmeso" <sdaoden@users.sf.net>
Date: Sat, 5 Jul 2014 15:54:36 +0200
Subject: [PATCH] Add mime_char_to_hexseq(), mime_hexseq_to_char()

---
 mime_cte.c | 22 ++++++++++++++++++++++
 nailfuns.h |  7 +++++++
 2 files changed, 29 insertions(+)

diff --git a/mime_cte.c b/mime_cte.c
index 11d7e3fe..1678fb50 100644
--- a/mime_cte.c
+++ b/mime_cte.c
@@ -292,6 +292,28 @@ jleave:
    return ret;
 }
 
+FL char *
+mime_char_to_hexseq(char store[3], char c)
+{
+   char *rv;
+   NYD2_ENTER;
+
+   rv = _qp_ctohex(store, c);
+   NYD2_LEAVE;
+   return rv;
+}
+
+FL si32_t
+mime_hexseq_to_char(char const *hex)
+{
+   si32_t rv;
+   NYD2_ENTER;
+
+   rv = _qp_cfromhex(hex);
+   NYD2_LEAVE;
+   return rv;
+}
+
 FL size_t
 mime_cte_mustquote(char const *ln, size_t lnlen, bool_t ishead)
 {
diff --git a/nailfuns.h b/nailfuns.h
index 0ef0f1e8..d14a7a26 100644
--- a/nailfuns.h
+++ b/nailfuns.h
@@ -1211,6 +1211,13 @@ FL ssize_t     xmime_write(char const *ptr, size_t size, /* TODO LEGACY */
  * - Base64, section 6.8
  */
 
+/* Utilities: the former converts the byte c into a (NUL terminated)
+ * hexadecimal string as is used in URL percent- and quoted-printable encoding,
+ * the latter performs the backward conversion and returns the character or -1
+ * on error */
+FL char *      mime_char_to_hexseq(char store[3], char c);
+FL si32_t      mime_hexseq_to_char(char const *hex);
+
 /* How many characters of (the complete body) ln need to be quoted */
 FL size_t      mime_cte_mustquote(char const *ln, size_t lnlen, bool_t ishead);
 
-- 
2.11.4.GIT