release/src/router/minidlna/minixml.c

   1 /* minixml.c : the minimum size a xml parser can be ! */
   2 /* Project : miniupnp
   3  * webpage: http://miniupnp.free.fr/ or http://miniupnp.tuxfamily.org/
   4  * Author : Thomas Bernard
   5
   6 Copyright (c) 2005-2007, Thomas BERNARD
   7 All rights reserved.
   8
   9 Redistribution and use in source and binary forms, with or without
  10 modification, are permitted provided that the following conditions are met:
  11
  12     * Redistributions of source code must retain the above copyright notice,
  13       this list of conditions and the following disclaimer.
  14     * Redistributions in binary form must reproduce the above copyright notice,
  15       this list of conditions and the following disclaimer in the documentation
  16       and/or other materials provided with the distribution.
  17     * The name of the author may not be used to endorse or promote products
  18           derived from this software without specific prior written permission.
  19
  20 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  21 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  24 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  25 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  26 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  27 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  30 POSSIBILITY OF SUCH DAMAGE.
  31 */
  32 #include "minixml.h"
  33 #include "upnpreplyparse.h"
  34
  35 /* parseatt : used to parse the argument list
  36  * return 0 (false) in case of success and -1 (true) if the end
  37  * of the xmlbuffer is reached. */
  38 int parseatt(struct xmlparser * p)
  39 {
  40         const char * attname;
  41         int attnamelen;
  42         const char * attvalue;
  43         int attvaluelen;
  44         while(p->xml < p->xmlend)
  45         {
  46                 if(*p->xml=='/' || *p->xml=='>')
  47                         return 0;
  48                 if( !IS_WHITE_SPACE(*p->xml) )
  49                 {
  50                         char sep;
  51                         attname = p->xml;
  52                         attnamelen = 0;
  53                         while(*p->xml!='=' && !IS_WHITE_SPACE(*p->xml) )
  54                         {
  55                                 attnamelen++; p->xml++;
  56                                 if(p->xml >= p->xmlend)
  57                                         return -1;
  58                         }
  59                         while(*(p->xml++) != '=')
  60                         {
  61                                 if(p->xml >= p->xmlend)
  62                                         return -1;
  63                         }
  64                         while(IS_WHITE_SPACE(*p->xml))
  65                         {
  66                                 p->xml++;
  67                                 if(p->xml >= p->xmlend)
  68                                         return -1;
  69                         }
  70                         sep = *p->xml;
  71                         if(sep=='\'' || sep=='\"')
  72                         {
  73                                 p->xml++;
  74                                 if(p->xml >= p->xmlend)
  75                                         return -1;
  76                                 attvalue = p->xml;
  77                                 attvaluelen = 0;
  78                                 while(*p->xml != sep)
  79                                 {
  80                                         attvaluelen++; p->xml++;
  81                                         if(p->xml >= p->xmlend)
  82                                                 return -1;
  83                                 }
  84                         }
  85                         else
  86                         {
  87                                 attvalue = p->xml;
  88                                 attvaluelen = 0;
  89                                 while(   !IS_WHITE_SPACE(*p->xml)
  90                                           && *p->xml != '>' && *p->xml != '/')
  91                                 {
  92                                         attvaluelen++; p->xml++;
  93                                         if(p->xml >= p->xmlend)
  94                                                 return -1;
  95                                 }
  96                         }
  97                         /*printf("%.*s='%.*s'\n",
  98                                attnamelen, attname, attvaluelen, attvalue);*/
  99                         if(p->attfunc)
 100                                 p->attfunc(p->data, attname, attnamelen, attvalue, attvaluelen);
 101                 }
 102                 p->xml++;
 103         }
 104         return -1;
 105 }
 106
 107 /* parseelt parse the xml stream and
 108  * call the callback functions when needed... */
 109 void parseelt(struct xmlparser * p)
 110 {
 111         int i;
 112         const char * elementname;
 113         while(p->xml < (p->xmlend - 1))
 114         {
 115                 if((p->xml)[0]=='<' && (p->xml)[1]!='?')
 116                 {
 117                         i = 0; elementname = ++p->xml;
 118                         while( !IS_WHITE_SPACE(*p->xml)
 119                                   && (*p->xml!='>') && (*p->xml!='/')
 120                                  )
 121                         {
 122                                 i++; p->xml++;
 123                                 if (p->xml >= p->xmlend)
 124                                         return;
 125                                 /* to ignore namespace : */
 126                                 if(*p->xml==':')
 127                                 {
 128                                         i = 0;
 129                                         elementname = ++p->xml;
 130                                 }
 131                         }
 132                         if(i>0)
 133                         {
 134                                 if(p->starteltfunc)
 135                                         p->starteltfunc(p->data, elementname, i);
 136                                 if(parseatt(p))
 137                                         return;
 138                                 if(*p->xml!='/')
 139                                 {
 140                                         const char * data;
 141                                         i = 0; data = ++p->xml;
 142                                         if (p->xml >= p->xmlend)
 143                                                 return;
 144                                         while( IS_WHITE_SPACE(*p->xml) )
 145                                         {
 146                                                 p->xml++;
 147                                                 if (p->xml >= p->xmlend)
 148                                                         return;
 149                                         }
 150                                         while(*p->xml!='<')
 151                                         {
 152                                                 i++; p->xml++;
 153                                                 if (p->xml >= p->xmlend)
 154                                                         return;
 155                                         }
 156                                         if (p->datafunc)
 157                                         {
 158                                                 if (i > 0 || (p->flags & XML_STORE_EMPTY_FL))
 159                                                         p->datafunc(p->data, data, i);
 160                                         }
 161                                 }
 162                         }
 163                         else if(*p->xml == '/')
 164                         {
 165                                 i = 0; elementname = ++p->xml;
 166                                 if (p->xml >= p->xmlend)
 167                                         return;
 168                                 while((*p->xml != '>'))
 169                                 {
 170                                         i++; p->xml++;
 171                                         if (p->xml >= p->xmlend)
 172                                                 return;
 173                                 }
 174                                 if(p->endeltfunc)
 175                                         p->endeltfunc(p->data, elementname, i);
 176                                 p->xml++;
 177                         }
 178                 }
 179                 else
 180                 {
 181                         p->xml++;
 182                 }
 183         }
 184 }
 185
 186 /* the parser must be initialized before calling this function */
 187 void parsexml(struct xmlparser * parser)
 188 {
 189         parser->xml = parser->xmlstart;
 190         parser->xmlend = parser->xmlstart + parser->xmlsize;
 191         parseelt(parser);
 192 }
 193
 194