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// -*- 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;
}
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