зеркало из https://github.com/mozilla/pjs.git
249 строки
8.4 KiB
C
249 строки
8.4 KiB
C
/* -*- 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"
|
|
|
|
/**
|
|
* Valid mask values for nsEscape
|
|
* Note: these values are copied in nsINetUtil.idl. Any changes should be kept
|
|
* in sync.
|
|
*/
|
|
typedef enum {
|
|
url_All = 0 /**< %-escape every byte uncondtionally */
|
|
, 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:
|
|
*
|
|
* Note: These values are copied to nsINetUtil.idl
|
|
* Any changes should be kept in sync
|
|
*/
|
|
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 (<= 0x7F) 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,
|
|
PRUint32 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,
|
|
PRUint32 flags,
|
|
nsACString &result);
|
|
|
|
/** returns resultant string length **/
|
|
inline PRInt32 NS_UnescapeURL(char *str) {
|
|
return nsUnescapeCount(str);
|
|
}
|
|
|
|
/**
|
|
* String friendly versions...
|
|
*/
|
|
inline const nsCSubstring &
|
|
NS_EscapeURL(const nsCSubstring &str, PRUint32 flags, nsCSubstring &result) {
|
|
if (NS_EscapeURL(str.Data(), str.Length(), flags, result))
|
|
return result;
|
|
return str;
|
|
}
|
|
inline const nsCSubstring &
|
|
NS_UnescapeURL(const nsCSubstring &str, PRUint32 flags, nsCSubstring &result) {
|
|
if (NS_UnescapeURL(str.Data(), str.Length(), flags, result))
|
|
return result;
|
|
return str;
|
|
}
|
|
|
|
// nsACString is nsCSubstring when MOZ_V1_STRING_ABI is undefined.
|
|
#ifdef MOZ_V1_STRING_ABI
|
|
inline const nsACString &
|
|
NS_EscapeURL(const nsACString &str, PRUint32 flags, nsACString &result) {
|
|
// The iterator version of BeginReading provides us with both the data
|
|
// pointer and the length with only one function call.
|
|
nsACString::const_iterator iter;
|
|
str.BeginReading(iter);
|
|
if (NS_EscapeURL(iter.get(), iter.size_forward(), flags, result))
|
|
return result;
|
|
return str;
|
|
}
|
|
inline const nsACString &
|
|
NS_EscapeURL(const nsCSubstring &str, PRUint32 flags, nsACString &result) {
|
|
if (NS_EscapeURL(str.Data(), str.Length(), flags, result))
|
|
return result;
|
|
return str;
|
|
}
|
|
inline const nsACString &
|
|
NS_UnescapeURL(const nsACString &str, PRUint32 flags, nsACString &result) {
|
|
// The iterator version of BeginReading provides us with both the data
|
|
// pointer and the length with only one function call.
|
|
nsACString::const_iterator iter;
|
|
str.BeginReading(iter);
|
|
if (NS_UnescapeURL(iter.get(), iter.size_forward(), flags, result))
|
|
return result;
|
|
return str;
|
|
}
|
|
inline const nsACString &
|
|
NS_UnescapeURL(const nsCSubstring &str, PRUint32 flags, nsACString &result) {
|
|
if (NS_UnescapeURL(str.Data(), str.Length(), flags, result))
|
|
return result;
|
|
return str;
|
|
}
|
|
#endif // MOZ_V1_STRING_ABI
|
|
|
|
/**
|
|
* CString version of nsEscape. Returns true on success, false
|
|
* on out of memory. To reverse this function, use NS_UnescapeURL.
|
|
*/
|
|
inline PRBool
|
|
NS_Escape(const nsCString& aOriginal, nsCString& aEscaped,
|
|
nsEscapeMask aMask)
|
|
{
|
|
char* esc = nsEscape(aOriginal.get(), aMask);
|
|
if (! esc)
|
|
return PR_FALSE;
|
|
aEscaped.Adopt(esc);
|
|
return PR_TRUE;
|
|
}
|
|
|
|
/**
|
|
* Inline unescape of mutable string object.
|
|
*/
|
|
inline nsCString &
|
|
NS_UnescapeURL(nsCString &str)
|
|
{
|
|
str.SetLength(nsUnescapeCount(str.BeginWriting()));
|
|
return str;
|
|
}
|
|
|
|
#endif // _ESCAPE_H_
|