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/* -*- Mode: C++; tab-width: 2; 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):
*
* 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 ***** */
/* First checked in on 98/12/03 by John R. McMullen, derived from net.h/mkparse.c. */
#ifndef _ESCAPE_H_
#define _ESCAPE_H_
#include "prtypes.h"
#include "nscore.h"
#include "nsError.h"
#include "nsString.h"
#ifdef VBOX_WITH_XPCOM_NAMESPACE_CLEANUP
#define nsEscape VBoxNsxpnsEscape
#define nsUnescape VBoxNsxpnsUnescape
#define nsUnescapeCount VBoxNsxpnsUnescapeCount
#define nsEscapeHTML VBoxNsxpnsEscapeHTML
#define nsEscapeHTML2 VBoxNsxpnsEscapeHTML2
#endif /* VBOX_WITH_XPCOM_NAMESPACE_CLEANUP */
/**
* Valid mask values for nsEscape
*/
typedef enum {
url_XAlphas = PR_BIT(0) /**< Normal escape - leave alphas intact, escape the rest */
, url_XPAlphas = PR_BIT(1) /**< As url_XAlphas, but convert spaces (0x20) to '+' and plus to %2B */
, url_Path = PR_BIT(2) /**< As url_XAlphas, but don't escape slash ('/') */
} nsEscapeMask;
#ifdef __cplusplus
extern "C" {
#endif
/**
* Escape the given string according to mask
* @param str The string to escape
* @param mask How to escape the string
* @return A newly allocated escaped string that must be free'd with
* nsCRT::free, or null on failure
*/
NS_COM char * nsEscape(const char * str, nsEscapeMask mask);
NS_COM char * nsUnescape(char * str);
/* decode % escaped hex codes into character values,
* modifies the parameter, returns the same buffer
*/
NS_COM PRInt32 nsUnescapeCount (char * str);
/* decode % escaped hex codes into character values,
* modifies the parameter buffer, returns the length of the result
* (result may contain \0's).
*/
NS_COM char *
nsEscapeHTML(const char * string);
NS_COM PRUnichar *
nsEscapeHTML2(const PRUnichar *aSourceBuffer,
PRInt32 aSourceBufferLen = -1);
/*
* Escape problem char's for HTML display
*/
#ifdef __cplusplus
}
#endif
/**
* NS_EscapeURL/NS_UnescapeURL constants for |flags| parameter:
*/
enum EscapeMask {
/** url components **/
esc_Scheme = PR_BIT(0),
esc_Username = PR_BIT(1),
esc_Password = PR_BIT(2),
esc_Host = PR_BIT(3),
esc_Directory = PR_BIT(4),
esc_FileBaseName = PR_BIT(5),
esc_FileExtension = PR_BIT(6),
esc_FilePath = esc_Directory | esc_FileBaseName | esc_FileExtension,
esc_Param = PR_BIT(7),
esc_Query = PR_BIT(8),
esc_Ref = PR_BIT(9),
/** special flags **/
esc_Minimal = esc_Scheme | esc_Username | esc_Password | esc_Host | esc_FilePath | esc_Param | esc_Query | esc_Ref,
esc_Forced = PR_BIT(10), /* forces escaping of existing escape sequences */
esc_OnlyASCII = PR_BIT(11), /* causes non-ascii octets to be skipped */
esc_OnlyNonASCII = PR_BIT(12), /* causes _graphic_ ascii octets (0x20-0x7E)
* to be skipped when escaping. causes all
* ascii octets to be skipped when unescaping */
esc_AlwaysCopy = PR_BIT(13), /* copy input to result buf even if escaping is unnecessary */
esc_Colon = PR_BIT(14), /* forces escape of colon */
esc_SkipControl = PR_BIT(15) /* skips C0 and DEL from unescaping */
};
/**
* NS_EscapeURL
*
* Escapes invalid char's in an URL segment. Has no side-effect if the URL
* segment is already escaped. Otherwise, the escaped URL segment is appended
* to |result|.
*
* @param str url segment string
* @param len url segment string length (-1 if unknown)
* @param flags url segment type flag
* @param result result buffer, untouched if part is already escaped
*
* @return TRUE if escaping was performed, FALSE otherwise.
*/
NS_COM PRBool NS_EscapeURL(const char *str,
PRInt32 len,
PRInt16 flags,
nsACString &result);
/**
* Expands URL escape sequences... beware embedded null bytes!
*
* @param str url string to unescape
* @param len length of |str|
* @param flags only esc_OnlyNonASCII, esc_SkipControl and esc_AlwaysCopy
* are recognized
* @param result result buffer, untouched if |str| is already unescaped
*
* @return TRUE if unescaping was performed, FALSE otherwise.
*/
NS_COM PRBool NS_UnescapeURL(const char *str,
PRInt32 len,
PRInt16 flags,
nsACString &result);
/** returns resultant string length **/
inline PRInt32 NS_UnescapeURL(char *str) { return nsUnescapeCount(str); }
/**
* string friendly versions...
*/
inline const nsACString &
NS_EscapeURL(const nsASingleFragmentCString &part, PRInt16 partType, nsACString &result) {
const char *temp;
if (NS_EscapeURL(part.BeginReading(temp), part.Length(), partType, result))
return result;
return part;
}
inline const nsACString &
NS_UnescapeURL(const nsASingleFragmentCString &str, PRInt16 flags, nsACString &result) {
const char *temp;
if (NS_UnescapeURL(str.BeginReading(temp), str.Length(), flags, result))
return result;
return str;
}
// inline unescape
inline nsAFlatCString &
NS_UnescapeURL(nsAFlatCString &str)
{
str.SetLength(nsUnescapeCount(str.BeginWriting()));
return str;
}
#endif // _ESCAPE_H_
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