зеркало из https://github.com/mozilla/gecko-dev.git
148 строки
3.3 KiB
C
148 строки
3.3 KiB
C
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/* -*- Mode: C; tab-width: 4; 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 License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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/* metatag.c */
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#include "intlpriv.h"
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#include "xp.h"
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#include "libi18n.h"
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/*
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This function return csid if it finds Meta charset info
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Currently there are two way to specify Meta charset
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1. <META HTTP-EQUIV=Content-Type CONTENT="text/html; charset=iso-8859-1">
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2. <META charset=iso-8859-1>
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Right now, it scans for charset
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*/
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MODULE_PRIVATE int PeekMetaCharsetTag(char *pSrc, int len)
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{
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char *p;
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char charset[MAX_CSNAME+1];
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int i, k;
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int n;
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char ch;
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for (i = 0; i < len; i++, pSrc++)
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{
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if (*pSrc != '<')
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continue;
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pSrc ++ ;
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i ++ ;
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if ((i+13) > len) /* at least need more than 13 bytes */
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break;
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switch (*pSrc) {
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case 'm':
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case 'M':
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if (strncasecomp(pSrc, "meta", 4) == 0)
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{
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pSrc = pSrc + 4;
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i += 4;
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n = len - i; /* set n here to make sure it won't go
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out of block boundary */
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for (p = pSrc; n > 0; p ++, n--)
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{
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if (*p == '>' || *p == '<')
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break ;
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if (n < 9)
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{
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n = 0;
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break;
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}
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if ((n > 9) && (*p == 'c' || *p == 'C') && strncasecomp(p, "charset", 7) == 0)
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{
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p += 7;
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n -= 7;
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while ((n > 0) && (*p == ' ' || *p == '\t')) /* skip spaces */
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{
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p ++ ;
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n --;
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}
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if (n <= 0 || *p != '=')
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break;
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p ++;
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n --;
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while ((n > 0) && (*p == ' ' || *p == '\t')) /* skip spaces */
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{
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n --;
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p ++ ;
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}
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if (n <= 0)
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break;
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/* now we go to find real charset name and convert it to csid */
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if (*p == '\"' || *p == '\'')
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{
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p ++ ;
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n -- ;
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for (k = 0; n > 0 && k < MAX_CSNAME && *p != '\'' && *p != '\"'; p++, k++, n--)
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charset[k] = *p ;
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charset[k] = '\0';
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}
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else
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{
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for (k = 0; n > 0 && k < MAX_CSNAME && *p != '\'' && *p != '\"' && *p != '>'; p++, k++, n--)
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charset[k] = *p ;
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charset[k] = '\0';
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}
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if (*charset && (n >= 0)) /* ftang : change from if (*charset && (n > 0)) */
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{
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int16 doc_csid = INTL_CharSetNameToID(charset);
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if (doc_csid == CS_UNKNOWN)
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{
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doc_csid = CS_DEFAULT;
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}
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return doc_csid;
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}
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}
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}
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if (n == 0) /* no more data left */
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return 0;
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}
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break;
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case 'b':
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case 'B': /* quit if we see <BODY ...> tag */
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if (strncasecomp(pSrc, "body", 4) == 0)
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return 0;
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break;
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case 'p':
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case 'P': /* quit if we see <P ...> tag */
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ch = *(pSrc + 1);
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if (ch == '>' || ch == ' ' || ch == '\t')
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return 0;
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break;
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}
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}
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return 0;
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}
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