[gmime] Make the function for unfolding a header (RFC 5322, sect. 2.2.3) publicly available. (#37)

[Jeffrey Stedfast <fejj src gnome org>]

commit c09bd4a4b25b5f1df06da55c628f63c85aaf7d6f
Author: albrechtd <albrecht dress arcor de>
Date:   Fri Dec 1 03:39:15 2017 +0100

    Make the function for unfolding a header (RFC 5322, sect. 2.2.3) publicly available. (#37)

 gmime/gmime-header.c |   33 +--------------------------------
 gmime/gmime-utils.c  |   39 +++++++++++++++++++++++++++++++++++++++
 gmime/gmime-utils.h  |    1 +
 3 files changed, 41 insertions(+), 32 deletions(-)
---
diff --git a/gmime/gmime-header.c b/gmime/gmime-header.c
index fff886a..bf0c368 100644
--- a/gmime/gmime-header.c
+++ b/gmime/gmime-header.c
@@ -214,37 +214,6 @@ g_mime_header_get_name (GMimeHeader *header)
 }
 
 
-static char *
-unfold (const char *value)
-{
-       register const char *inptr = value;
-       const char *start, *inend;
-       char *str, *outptr;
-       
-       while (is_lwsp (*inptr))
-               inptr++;
-       
-       inend = start = inptr;
-       while (*inptr) {
-               if (!is_lwsp (*inptr++))
-                       inend = inptr;
-       }
-       
-       outptr = str = g_malloc ((size_t) (inend - start) + 1);
-       inptr = start;
-       
-       while (inptr < inend) {
-               if (*inptr != '\r' && *inptr != '\n')
-                       *outptr++ = *inptr;
-               inptr++;
-       }
-       
-       *outptr = '\0';
-       
-       return str;
-}
-
-
 /**
  * g_mime_header_get_value:
  * @header: a #GMimeHeader
@@ -261,7 +230,7 @@ g_mime_header_get_value (GMimeHeader *header)
        g_return_val_if_fail (GMIME_IS_HEADER (header), NULL);
        
        if (!header->value && header->raw_value) {
-               buf = unfold (header->raw_value);
+               buf = g_mime_utils_header_value_unfold (header->raw_value);
                header->value = g_mime_utils_header_decode_text (header->options, buf);
                g_free (buf);
        }
diff --git a/gmime/gmime-utils.c b/gmime/gmime-utils.c
index 77f018b..0849cea 100644
--- a/gmime/gmime-utils.c
+++ b/gmime/gmime-utils.c
@@ -2754,3 +2754,42 @@ g_mime_utils_header_printf (GMimeParserOptions *options, GMimeFormatOptions *for
        
        return ret;
 }
+
+
+/**
+ * g_mime_utils_header_value_unfold:
+ * @value: raw header value
+ *
+ * Unfolds a raw header value according to the rules in rfc822.
+ *
+ * Returns: an allocated string containing the unfolded header value.
+ **/
+char *
+g_mime_utils_header_value_unfold (const char *value)
+{
+       register const char *inptr = value;
+       const char *start, *inend;
+       char *str, *outptr;
+
+       while (is_lwsp (*inptr))
+               inptr++;
+
+       inend = start = inptr;
+       while (*inptr) {
+               if (!is_lwsp (*inptr++))
+                       inend = inptr;
+       }
+
+       outptr = str = g_malloc ((size_t) (inend - start) + 1);
+       inptr = start;
+
+       while (inptr < inend) {
+               if (*inptr != '\r' && *inptr != '\n')
+                       *outptr++ = *inptr;
+               inptr++;
+       }
+
+       *outptr = '\0';
+
+       return str;
+}
diff --git a/gmime/gmime-utils.h b/gmime/gmime-utils.h
index c2517af..95204e6 100644
--- a/gmime/gmime-utils.h
+++ b/gmime/gmime-utils.h
@@ -42,6 +42,7 @@ char *g_mime_utils_decode_message_id (const char *message_id);
 char  *g_mime_utils_structured_header_fold (GMimeParserOptions *options, GMimeFormatOptions *format, const 
char *header);
 char  *g_mime_utils_unstructured_header_fold (GMimeParserOptions *options, GMimeFormatOptions *format, const 
char *header);
 char  *g_mime_utils_header_printf (GMimeParserOptions *options, GMimeFormatOptions *format, const char 
*text, ...) G_GNUC_PRINTF (3, 4);
+char  *g_mime_utils_header_value_unfold (const char *value);
 
 char  *g_mime_utils_quote_string (const char *str);
 void   g_mime_utils_unquote_string (char *str);