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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Sean Su <ssu@netscape.com>
* Revision checked in on 01/03/30 by ssu@netscape.com, derived from:
* mozilla/xpcom/io/nsEscape.h
* mozilla/xpcom/io/nsEscape.cpp
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */
#include "extern.h"
#include "extra.h"
#ifdef __cplusplus
}
#endif /* __cplusplus */
#include "nsEscape.h"
typedef int PRInt32;
const int netCharType[256] =
/* Bit 0 xalpha -- the alphas
** Bit 1 xpalpha -- as xalpha but
** converts spaces to plus and plus to %20
** Bit 3 ... path -- as xalphas but doesn't escape '/'
*/
/* 0 1 2 3 4 5 6 7 8 9 A B C D E F */
{ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x */
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 1x */
0,0,0,0,0,0,0,0,0,0,7,4,0,7,7,4, /* 2x !"#$%&'()*+,-./ */
7,7,7,7,7,7,7,7,7,7,0,0,0,7,0,0, /* 3x 0123456789:;<=>? */
0,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, /* 4x @ABCDEFGHIJKLMNO */
/* bits for '@' changed from 7 to 0 so '@' can be escaped */
/* in usernames and passwords in publishing. */
7,7,7,7,7,7,7,7,7,7,7,0,0,0,0,7, /* 5X PQRSTUVWXYZ[\]^_ */
0,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, /* 6x `abcdefghijklmno */
7,7,7,7,7,7,7,7,7,7,7,0,0,0,0,0, /* 7X pqrstuvwxyz{\}~ DEL */
0, };
/* decode % escaped hex codes into character values
*/
#define UNHEX(C) \
((C >= '0' && C <= '9') ? C - '0' : \
((C >= 'A' && C <= 'F') ? C - 'A' + 10 : \
((C >= 'a' && C <= 'f') ? C - 'a' + 10 : 0)))
#define IS_OK(C) (netCharType[((unsigned int) (C))] & (mask))
#define HEX_ESCAPE '%'
//----------------------------------------------------------------------------------------
NS_COM char* nsEscape(const char * str, nsEscapeMask mask)
//----------------------------------------------------------------------------------------
{
if(!str)
return NULL;
return nsEscapeCount(str, lstrlen(str), mask, NULL);
}
//----------------------------------------------------------------------------------------
NS_COM char* nsEscapeCount(
const char * str,
PRInt32 len,
nsEscapeMask mask,
PRInt32* out_len)
//----------------------------------------------------------------------------------------
{
if (!str)
return 0;
int i, extra = 0;
char* hexChars = "0123456789ABCDEF";
register const unsigned char* src = (const unsigned char *) str;
for (i = 0; i < len; i++)
{
if (!IS_OK(*src++))
extra += 2; /* the escape, plus an extra byte for each nibble */
}
char* result = (char *)NS_GlobalAlloc(len + extra + 1);
if (!result)
return 0;
register unsigned char* dst = (unsigned char *) result;
src = (const unsigned char *) str;
if (mask == url_XPAlphas)
{
for (i = 0; i < len; i++)
{
unsigned char c = *src++;
if (IS_OK(c))
*dst++ = c;
else if (c == ' ')
*dst++ = '+'; /* convert spaces to pluses */
else
{
*dst++ = HEX_ESCAPE;
*dst++ = hexChars[c >> 4]; /* high nibble */
*dst++ = hexChars[c & 0x0f]; /* low nibble */
}
}
}
else
{
for (i = 0; i < len; i++)
{
unsigned char c = *src++;
if (IS_OK(c))
*dst++ = c;
else
{
*dst++ = HEX_ESCAPE;
*dst++ = hexChars[c >> 4]; /* high nibble */
*dst++ = hexChars[c & 0x0f]; /* low nibble */
}
}
}
*dst = '\0'; /* tack on eos */
if(out_len)
*out_len = dst - (unsigned char *) result;
return result;
}
//----------------------------------------------------------------------------------------
NS_COM char* nsUnescape(char * str)
//----------------------------------------------------------------------------------------
{
nsUnescapeCount(str);
return str;
}
//----------------------------------------------------------------------------------------
NS_COM PRInt32 nsUnescapeCount(char * str)
//----------------------------------------------------------------------------------------
{
register char *src = str;
register char *dst = str;
while (*src)
if (*src != HEX_ESCAPE)
*dst++ = *src++;
else
{
src++; /* walk over escape */
if (*src)
{
*dst = UNHEX(*src) << 4;
src++;
}
if (*src)
{
*dst = (*dst + UNHEX(*src));
src++;
}
dst++;
}
*dst = 0;
return (int)(dst - str);
} /* NET_UnEscapeCnt */
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