1/* $Id: minixml.c,v 1.12 2017/12/12 11:17:40 nanard Exp $ */
2/* vim: tabstop=4 shiftwidth=4 noexpandtab
3 * minixml.c : the minimum size a xml parser can be ! */
4/* Project : miniupnp
5 * webpage: http://miniupnp.free.fr/ or http://miniupnp.tuxfamily.org/
6 * Author : Thomas Bernard
7
8Copyright (c) 2005-2017, Thomas BERNARD
9All rights reserved.
10
11Redistribution and use in source and binary forms, with or without
12modification, are permitted provided that the following conditions are met:
13
14 * Redistributions of source code must retain the above copyright notice,
15 this list of conditions and the following disclaimer.
16 * Redistributions in binary form must reproduce the above copyright notice,
17 this list of conditions and the following disclaimer in the documentation
18 and/or other materials provided with the distribution.
19 * The name of the author may not be used to endorse or promote products
20 derived from this software without specific prior written permission.
21
22THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
23AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
26LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
32POSSIBILITY OF SUCH DAMAGE.
33*/
34#include <string.h>
35#include "minixml.h"
36
37/* parseatt : used to parse the argument list
38 * return 0 (false) in case of success and -1 (true) if the end
39 * of the xmlbuffer is reached. */
40static int parseatt(struct xmlparser * p)
41{
42 const char * attname;
43 int attnamelen;
44 const char * attvalue;
45 int attvaluelen;
46 while(p->xml < p->xmlend)
47 {
48 if(*p->xml=='/' || *p->xml=='>')
49 return 0;
50 if( !IS_WHITE_SPACE(*p->xml) )
51 {
52 char sep;
53 attname = p->xml;
54 attnamelen = 0;
55 while(*p->xml!='=' && !IS_WHITE_SPACE(*p->xml) )
56 {
57 attnamelen++; p->xml++;
58 if(p->xml >= p->xmlend)
59 return -1;
60 }
61 while(*(p->xml++) != '=')
62 {
63 if(p->xml >= p->xmlend)
64 return -1;
65 }
66 while(IS_WHITE_SPACE(*p->xml))
67 {
68 p->xml++;
69 if(p->xml >= p->xmlend)
70 return -1;
71 }
72 sep = *p->xml;
73 if(sep=='\'' || sep=='\"')
74 {
75 p->xml++;
76 if(p->xml >= p->xmlend)
77 return -1;
78 attvalue = p->xml;
79 attvaluelen = 0;
80 while(*p->xml != sep)
81 {
82 attvaluelen++; p->xml++;
83 if(p->xml >= p->xmlend)
84 return -1;
85 }
86 }
87 else
88 {
89 attvalue = p->xml;
90 attvaluelen = 0;
91 while( !IS_WHITE_SPACE(*p->xml)
92 && *p->xml != '>' && *p->xml != '/')
93 {
94 attvaluelen++; p->xml++;
95 if(p->xml >= p->xmlend)
96 return -1;
97 }
98 }
99 /*printf("%.*s='%.*s'\n",
100 attnamelen, attname, attvaluelen, attvalue);*/
101 if(p->attfunc)
102 p->attfunc(p->data, attname, attnamelen, attvalue, attvaluelen);
103 }
104 p->xml++;
105 }
106 return -1;
107}
108
109/* parseelt parse the xml stream and
110 * call the callback functions when needed... */
111static void parseelt(struct xmlparser * p)
112{
113 int i;
114 const char * elementname;
115 while(p->xml < (p->xmlend - 1))
116 {
117 if((p->xml + 4) <= p->xmlend && (0 == memcmp(p->xml, "<!--", 4)))
118 {
119 p->xml += 3;
120 /* ignore comments */
121 do
122 {
123 p->xml++;
124 if ((p->xml + 3) >= p->xmlend)
125 return;
126 }
127 while(memcmp(p->xml, "-->", 3) != 0);
128 p->xml += 3;
129 }
130 else if((p->xml)[0]=='<' && (p->xml)[1]!='?')
131 {
132 i = 0; elementname = ++p->xml;
133 while( !IS_WHITE_SPACE(*p->xml)
134 && (*p->xml!='>') && (*p->xml!='/')
135 )
136 {
137 i++; p->xml++;
138 if (p->xml >= p->xmlend)
139 return;
140 /* to ignore namespace : */
141 if(*p->xml==':')
142 {
143 i = 0;
144 elementname = ++p->xml;
145 }
146 }
147 if(i>0)
148 {
149 if(p->starteltfunc)
150 p->starteltfunc(p->data, elementname, i);
151 if(parseatt(p))
152 return;
153 if(*p->xml!='/')
154 {
155 const char * data;
156 i = 0; data = ++p->xml;
157 if (p->xml >= p->xmlend)
158 return;
159 while( IS_WHITE_SPACE(*p->xml) )
160 {
161 i++; p->xml++;
162 if (p->xml >= p->xmlend)
163 return;
164 }
165 /* CDATA are at least 9 + 3 characters long : <![CDATA[ ]]> */
166 if((p->xmlend >= (p->xml + (9 + 3))) && (memcmp(p->xml, "<![CDATA[", 9) == 0))
167 {
168 /* CDATA handling */
169 p->xml += 9;
170 data = p->xml;
171 i = 0;
172 while(memcmp(p->xml, "]]>", 3) != 0)
173 {
174 i++; p->xml++;
175 if ((p->xml + 3) >= p->xmlend)
176 return;
177 }
178 if(i>0 && p->datafunc)
179 p->datafunc(p->data, data, i);
180 while(*p->xml!='<')
181 {
182 p->xml++;
183 if (p->xml >= p->xmlend)
184 return;
185 }
186 }
187 else
188 {
189 while(*p->xml!='<')
190 {
191 i++; p->xml++;
192 if ((p->xml + 1) >= p->xmlend)
193 return;
194 }
195 if(i>0 && p->datafunc && *(p->xml + 1) == '/')
196 p->datafunc(p->data, data, i);
197 }
198 }
199 }
200 else if(*p->xml == '/')
201 {
202 i = 0; elementname = ++p->xml;
203 if (p->xml >= p->xmlend)
204 return;
205 while((*p->xml != '>'))
206 {
207 i++; p->xml++;
208 if (p->xml >= p->xmlend)
209 return;
210 }
211 if(p->endeltfunc)
212 p->endeltfunc(p->data, elementname, i);
213 p->xml++;
214 }
215 }
216 else
217 {
218 p->xml++;
219 }
220 }
221}
222
223/* the parser must be initialized before calling this function */
224void parsexml(struct xmlparser * parser)
225{
226 parser->xml = parser->xmlstart;
227 parser->xmlend = parser->xmlstart + parser->xmlsize;
228 parseelt(parser);
229}
230
231
232