1 files changed, 132 insertions, 0 deletions
diff --git a/src/common/mime.c b/src/common/mime.c
new file mode 100644
index 00000000..fe45123c
--- /dev/null
+++ b/src/common/mime.c
@@ -0,0 +1,132 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2011 New Dream Network
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation.  See file COPYING.
+ *
+ */
+#include "common/utf8.h"
+
+#include <errno.h>
+#include <stdio.h>
+
+int mime_encode_as_qp(const char *input, char *output, int outlen)
+{
+	int ret = 1;
+	char *o = output;
+	const unsigned char *i = (const unsigned char*)input;
+	while (1) {
+		int c = *i;
+		if (c == '\0') {
+			break;
+		}
+		else if ((c & 0x80) || (c == '=') || (is_control_character(c))) {
+			if (outlen >= 3) {
+				snprintf(o, outlen, "=%02X", c);
+				outlen -= 3;
+				o += 3;
+			}
+			else
+				outlen = 0;
+			ret += 3;
+		}
+		else {
+			if (outlen >= 1) {
+				snprintf(o, outlen, "%c", c);
+				outlen -= 1;
+				o += 1;
+			}
+			ret += 1;
+		}
+		++i;
+	}
+	return ret;
+}
+
+static inline signed int hexchar_to_int(unsigned int c)
+{
+	switch(c) {
+	case '0':
+		return 0;
+	case '1':
+		return 1;
+	case '2':
+		return 2;
+	case '3':
+		return 3;
+	case '4':
+		return 4;
+	case '5':
+		return 5;
+	case '6':
+		return 6;
+	case '7':
+		return 7;
+	case '8':
+		return 8;
+	case '9':
+		return 9;
+	case 'A':
+	case 'a':
+		return 10;
+	case 'B':
+	case 'b':
+		return 11;
+	case 'C':
+	case 'c':
+		return 12;
+	case 'D':
+	case 'd':
+		return 13;
+	case 'E':
+	case 'e':
+		return 14;
+	case 'F':
+	case 'f':
+		return 15;
+	case '\0':
+	default:
+	    return -EDOM;
+	}
+}
+
+int mime_decode_from_qp(const char *input, char *output, int outlen)
+{
+	int ret = 1;
+	char *o = output;
+	const unsigned char *i = (const unsigned char*)input;
+	while (1) {
+		unsigned int c = *i;
+		if (c == '\0') {
+			break;
+		}
+		else if (c & 0x80) {
+			/* The high bit is never set in quoted-printable encoding! */
+			return -EDOM;
+		}
+		else if (c == '=') {
+			int high = hexchar_to_int(*++i);
+			if (high < 0)
+				return -EINVAL;
+			int low = hexchar_to_int(*++i);
+			if (low < 0)
+				return -EINVAL;
+			c = (high << 4) + low;
+		}
+		++i;
+
+		if (outlen >= 1) {
+			snprintf(o, outlen, "%c", c);
+			outlen -= 1;
+			o += 1;
+		}
+		ret += 1;
+	}
+	return ret;
+}