92 lines
2.2 KiB
C++
92 lines
2.2 KiB
C++
/**
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* util.cpp
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* Yet Another SIP Stack
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* This file is part of the YATE Project http://YATE.null.ro
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*
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* Yet Another Telephony Engine - a fully featured software PBX and IVR
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* Copyright (C) 2004 Null Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <telengine.h>
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namespace TelEngine {
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// Utility function, checks if a character is a folded line continuation
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static bool isContinuation(char c)
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{
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return ((c == ' ') || (c == '\t'));
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}
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// Utility function, returns an unfolded line and advances the pointer
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String* getUnfoldedLine(const char** buf, int* len)
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{
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String* res = new String;
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const char* b = *buf;
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const char* s = b;
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int l = *len;
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int e = 0;
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for (;(l > 0); ++b, --l) {
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bool goOut = false;
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switch (*b) {
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case '\r':
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// CR is optional but skip over it if exists
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if ((l > 0) && (b[1] == '\n')) {
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++b;
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--l;
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}
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case '\n':
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++b;
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--l;
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{
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String line(s,e);
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*res << line;
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}
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// Skip over any continuation characters at start of next line
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goOut = true;
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while ((l > 1) && isContinuation(b[1])) {
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++b;
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--l;
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goOut = false;
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}
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s = b;
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if (isContinuation(s[0]))
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++s;
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e = 0;
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break;
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case '\0':
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// Should not happen - but let's accept what we got
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*res << s;
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goOut = true;
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break;
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default:
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// Just count this character - we'll pick it later
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++e;
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}
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// Exit without adjusting p and l
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if (goOut)
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break;
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}
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*buf = b;
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*len = l;
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res->trimBlanks();
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return res;
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}
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}
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/* vi: set ts=8 sw=4 sts=4 noet: */
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