зеркало из https://github.com/mozilla/pjs.git
225 строки
5.8 KiB
C++
225 строки
5.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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// First checked in on 98/12/03 by John R. McMullen, derived from net.h/mkparse.c.
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#include "nsEscape.h"
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#include "nsIAllocator.h"
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#include "nsCRT.h"
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const int netCharType[256] =
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/* Bit 0 xalpha -- the alphas
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** Bit 1 xpalpha -- as xalpha but
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** converts spaces to plus and plus to %20
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** Bit 3 ... path -- as xalphas but doesn't escape '/'
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*/
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/* 0 1 2 3 4 5 6 7 8 9 A B C D E F */
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{ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 1x */
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0,0,0,0,0,0,0,0,0,0,7,4,0,7,7,4, /* 2x !"#$%&'()*+,-./ */
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7,7,7,7,7,7,7,7,7,7,0,0,0,0,0,0, /* 3x 0123456789:;<=>? */
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0,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, /* 4x @ABCDEFGHIJKLMNO */
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/* bits for '@' changed from 7 to 0 so '@' can be escaped */
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/* in usernames and passwords in publishing. */
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7,7,7,7,7,7,7,7,7,7,7,0,0,0,0,7, /* 5X PQRSTUVWXYZ[\]^_ */
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0,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, /* 6x `abcdefghijklmno */
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7,7,7,7,7,7,7,7,7,7,7,0,0,0,0,0, /* 7X pqrstuvwxyz{\}~ DEL */
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0, };
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/* decode % escaped hex codes into character values
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*/
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#define UNHEX(C) \
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((C >= '0' && C <= '9') ? C - '0' : \
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((C >= 'A' && C <= 'F') ? C - 'A' + 10 : \
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((C >= 'a' && C <= 'f') ? C - 'a' + 10 : 0)))
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#define IS_OK(C) (netCharType[((unsigned int) (C))] & (mask))
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#define HEX_ESCAPE '%'
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//----------------------------------------------------------------------------------------
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NS_COM char* nsEscape(const char * str, nsEscapeMask mask)
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//----------------------------------------------------------------------------------------
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{
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if(!str)
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return NULL;
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return nsEscapeCount(str, (PRInt32)nsCRT::strlen(str), mask, NULL);
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}
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//----------------------------------------------------------------------------------------
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NS_COM char* nsEscapeCount(
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const char * str,
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PRInt32 len,
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nsEscapeMask mask,
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PRInt32* out_len)
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//----------------------------------------------------------------------------------------
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{
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if (!str)
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return 0;
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int i, extra = 0;
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char* hexChars = "0123456789ABCDEF";
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register const unsigned char* src = (const unsigned char *) str;
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for (i = 0; i < len; i++)
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{
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if (!IS_OK(*src++))
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extra += 2; /* the escape, plus an extra byte for each nibble */
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}
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char* result = (char *)nsAllocator::Alloc(len + extra + 1);
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if (!result)
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return 0;
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register unsigned char* dst = (unsigned char *) result;
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src = (const unsigned char *) str;
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if (mask == url_XPAlphas)
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{
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for (i = 0; i < len; i++)
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{
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unsigned char c = *src++;
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if (IS_OK(c))
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*dst++ = c;
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else if (c == ' ')
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*dst++ = '+'; /* convert spaces to pluses */
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else
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{
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*dst++ = HEX_ESCAPE;
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*dst++ = hexChars[c >> 4]; /* high nibble */
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*dst++ = hexChars[c & 0x0f]; /* low nibble */
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}
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}
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}
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else
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{
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for (i = 0; i < len; i++)
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{
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unsigned char c = *src++;
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if (IS_OK(c))
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*dst++ = c;
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else
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{
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*dst++ = HEX_ESCAPE;
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*dst++ = hexChars[c >> 4]; /* high nibble */
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*dst++ = hexChars[c & 0x0f]; /* low nibble */
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}
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}
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}
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*dst = '\0'; /* tack on eos */
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if(out_len)
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*out_len = dst - (unsigned char *) result;
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return result;
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}
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//----------------------------------------------------------------------------------------
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NS_COM char* nsUnescape(char * str)
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//----------------------------------------------------------------------------------------
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{
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nsUnescapeCount(str);
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return str;
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}
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//----------------------------------------------------------------------------------------
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NS_COM PRInt32 nsUnescapeCount(char * str)
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//----------------------------------------------------------------------------------------
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{
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register char *src = str;
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register char *dst = str;
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while (*src)
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if (*src != HEX_ESCAPE)
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*dst++ = *src++;
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else
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{
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src++; /* walk over escape */
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if (*src)
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{
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*dst = UNHEX(*src) << 4;
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src++;
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}
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if (*src)
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{
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*dst = (*dst + UNHEX(*src));
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src++;
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}
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dst++;
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}
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*dst = 0;
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return (int)(dst - str);
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} /* NET_UnEscapeCnt */
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NS_COM char *
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nsEscapeHTML(const char * string)
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{
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char *rv = (char *) nsAllocator::Alloc(nsCRT::strlen(string)*6 + 1); /* The +1 is for the trailing null! */
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char *ptr = rv;
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if(rv)
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{
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for(; *string != '\0'; string++)
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{
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if(*string == '<')
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{
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*ptr++ = '&';
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*ptr++ = 'l';
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*ptr++ = 't';
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*ptr++ = ';';
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}
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else if(*string == '>')
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{
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*ptr++ = '&';
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*ptr++ = 'g';
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*ptr++ = 't';
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*ptr++ = ';';
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}
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else if(*string == '&')
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{
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*ptr++ = '&';
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*ptr++ = 'a';
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*ptr++ = 'm';
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*ptr++ = 'p';
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*ptr++ = ';';
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}
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else if (*string == '"')
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{
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*ptr++ = '&';
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*ptr++ = 'q';
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*ptr++ = 'u';
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*ptr++ = 'o';
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*ptr++ = 't';
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*ptr++ = ';';
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}
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else
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{
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*ptr++ = *string;
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}
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}
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*ptr = '\0';
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}
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return(rv);
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}
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