1/* $Id: minixml.c,v 1.11 2014/02/03 15:54:12 nanard Exp $ */
2/* minixml.c : the minimum size a xml parser can be ! */
3/* Project : miniupnp
4 * webpage: http://miniupnp.free.fr/ or http://miniupnp.tuxfamily.org/
5 * Author : Thomas Bernard
6
7Copyright (c) 2005-2014, Thomas BERNARD
8All rights reserved.
9
10Redistribution and use in source and binary forms, with or without
11modification, are permitted provided that the following conditions are met:
12
13    * Redistributions of source code must retain the above copyright notice,
14      this list of conditions and the following disclaimer.
15    * Redistributions in binary form must reproduce the above copyright notice,
16      this list of conditions and the following disclaimer in the documentation
17      and/or other materials provided with the distribution.
18    * The name of the author may not be used to endorse or promote products
19	  derived from this software without specific prior written permission.
20
21THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
22AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
25LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31POSSIBILITY OF SUCH DAMAGE.
32*/
33#include <string.h>
34#include "minixml.h"
35
36/* parseatt : used to parse the argument list
37 * return 0 (false) in case of success and -1 (true) if the end
38 * of the xmlbuffer is reached. */
39static int parseatt(struct xmlparser * p)
40{
41	const char * attname;
42	int attnamelen;
43	const char * attvalue;
44	int attvaluelen;
45	while(p->xml < p->xmlend)
46	{
47		if(*p->xml=='/' || *p->xml=='>')
48			return 0;
49		if( !IS_WHITE_SPACE(*p->xml) )
50		{
51			char sep;
52			attname = p->xml;
53			attnamelen = 0;
54			while(*p->xml!='=' && !IS_WHITE_SPACE(*p->xml) )
55			{
56				attnamelen++; p->xml++;
57				if(p->xml >= p->xmlend)
58					return -1;
59			}
60			while(*(p->xml++) != '=')
61			{
62				if(p->xml >= p->xmlend)
63					return -1;
64			}
65			while(IS_WHITE_SPACE(*p->xml))
66			{
67				p->xml++;
68				if(p->xml >= p->xmlend)
69					return -1;
70			}
71			sep = *p->xml;
72			if(sep=='\'' || sep=='\"')
73			{
74				p->xml++;
75				if(p->xml >= p->xmlend)
76					return -1;
77				attvalue = p->xml;
78				attvaluelen = 0;
79				while(*p->xml != sep)
80				{
81					attvaluelen++; p->xml++;
82					if(p->xml >= p->xmlend)
83						return -1;
84				}
85			}
86			else
87			{
88				attvalue = p->xml;
89				attvaluelen = 0;
90				while(   !IS_WHITE_SPACE(*p->xml)
91					  && *p->xml != '>' && *p->xml != '/')
92				{
93					attvaluelen++; p->xml++;
94					if(p->xml >= p->xmlend)
95						return -1;
96				}
97			}
98			/*printf("%.*s='%.*s'\n",
99			       attnamelen, attname, attvaluelen, attvalue);*/
100			if(p->attfunc)
101				p->attfunc(p->data, attname, attnamelen, attvalue, attvaluelen);
102		}
103		p->xml++;
104	}
105	return -1;
106}
107
108/* parseelt parse the xml stream and
109 * call the callback functions when needed... */
110static void parseelt(struct xmlparser * p)
111{
112	int i;
113	const char * elementname;
114	while(p->xml < (p->xmlend - 1))
115	{
116		if((p->xml + 4) <= p->xmlend && (0 == memcmp(p->xml, "<!--", 4)))
117		{
118			p->xml += 3;
119			/* ignore comments */
120			do
121			{
122				p->xml++;
123				if ((p->xml + 3) >= p->xmlend)
124					return;
125			}
126			while(memcmp(p->xml, "-->", 3) != 0);
127			p->xml += 3;
128		}
129		else if((p->xml)[0]=='<' && (p->xml)[1]!='?')
130		{
131			i = 0; elementname = ++p->xml;
132			while( !IS_WHITE_SPACE(*p->xml)
133				  && (*p->xml!='>') && (*p->xml!='/')
134				 )
135			{
136				i++; p->xml++;
137				if (p->xml >= p->xmlend)
138					return;
139				/* to ignore namespace : */
140				if(*p->xml==':')
141				{
142					i = 0;
143					elementname = ++p->xml;
144				}
145			}
146			if(i>0)
147			{
148				if(p->starteltfunc)
149					p->starteltfunc(p->data, elementname, i);
150				if(parseatt(p))
151					return;
152				if(*p->xml!='/')
153				{
154					const char * data;
155					i = 0; data = ++p->xml;
156					if (p->xml >= p->xmlend)
157						return;
158					while( IS_WHITE_SPACE(*p->xml) )
159					{
160						i++; p->xml++;
161						if (p->xml >= p->xmlend)
162							return;
163					}
164					if(memcmp(p->xml, "<![CDATA[", 9) == 0)
165					{
166						/* CDATA handling */
167						p->xml += 9;
168						data = p->xml;
169						i = 0;
170						while(memcmp(p->xml, "]]>", 3) != 0)
171						{
172							i++; p->xml++;
173							if ((p->xml + 3) >= p->xmlend)
174								return;
175						}
176						if(i>0 && p->datafunc)
177							p->datafunc(p->data, data, i);
178						while(*p->xml!='<')
179						{
180							p->xml++;
181							if (p->xml >= p->xmlend)
182								return;
183						}
184					}
185					else
186					{
187						while(*p->xml!='<')
188						{
189							i++; p->xml++;
190							if ((p->xml + 1) >= p->xmlend)
191								return;
192						}
193						if(i>0 && p->datafunc && *(p->xml + 1) == '/')
194							p->datafunc(p->data, data, i);
195					}
196				}
197			}
198			else if(*p->xml == '/')
199			{
200				i = 0; elementname = ++p->xml;
201				if (p->xml >= p->xmlend)
202					return;
203				while((*p->xml != '>'))
204				{
205					i++; p->xml++;
206					if (p->xml >= p->xmlend)
207						return;
208				}
209				if(p->endeltfunc)
210					p->endeltfunc(p->data, elementname, i);
211				p->xml++;
212			}
213		}
214		else
215		{
216			p->xml++;
217		}
218	}
219}
220
221/* the parser must be initialized before calling this function */
222void parsexml(struct xmlparser * parser)
223{
224	parser->xml = parser->xmlstart;
225	parser->xmlend = parser->xmlstart + parser->xmlsize;
226	parseelt(parser);
227}
228
229
230