852 lines
22 KiB
C
852 lines
22 KiB
C
/*
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* Copyright (c) 2002, Adam Dunkels.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This file is part of the Contiki desktop environment
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*
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* $Id: htmlparser.c,v 1.2 2006/08/14 23:31:40 oliverschmidt Exp $
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*
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*/
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/* htmlparser.c:
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*
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* Implements a very simplistic HTML parser. It recognizes HTML links
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* (<a href>-tags), HTML img alt tags, a few text flow break tags
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G * (<br>, <p>, <h>), the <li> tag (but does not even try to
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* distinguish between <ol> or <ul>) as well as HTML comment tags
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* (<!-- -->).
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*
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* To save memory, the HTML parser is state machine driver, which
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* means that it will shave off one character from the HTML page,
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* process that character, and return to the next. Another way of
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* doing it would be to buffer a number of characters and process them
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* together.
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*
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* The main function in this file is the htmlparser_parse() function
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* which takes a htmlparser_state structur and a part of an HTML file
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* as an argument. The htmlparser_parse() function will call the
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* helper functions parse_char() and parse_tag(). Those functions will
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* in turn call the two callback functions htmlparser_char() and
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* htmlparser_tag(). Those functions must be implemented by the using
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* module (e.g., a web browser program).
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*
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* htmlparser_char() will be called for every non-tag character.
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*
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* htmlparser_tag() will be called whenever a full tag has been found.
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*
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*/
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#include "htmlparser.h"
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#include "html-strings.h"
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#include "contiki.h"
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#include <string.h>
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#if 1
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#define PRINTF(x)
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#else
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#include <stdio.h>
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#define PRINTF(x) printf x
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#endif
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/*-----------------------------------------------------------------------------------*/
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#define ISO_A 0x41
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#define ISO_B 0x42
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#define ISO_E 0x45
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#define ISO_F 0x46
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#define ISO_G 0x47
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#define ISO_H 0x48
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#define ISO_I 0x49
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#define ISO_L 0x4c
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#define ISO_M 0x4d
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#define ISO_P 0x50
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#define ISO_R 0x52
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#define ISO_T 0x54
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#define ISO_a (ISO_A | 0x20)
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#define ISO_b (ISO_B | 0x20)
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#define ISO_e (ISO_E | 0x20)
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#define ISO_f (ISO_F | 0x20)
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#define ISO_g (ISO_G | 0x20)
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#define ISO_h (ISO_H | 0x20)
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#define ISO_i (ISO_I | 0x20)
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#define ISO_l (ISO_L | 0x20)
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#define ISO_m (ISO_M | 0x20)
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#define ISO_p (ISO_P | 0x20)
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#define ISO_r (ISO_R | 0x20)
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#define ISO_t (ISO_T | 0x20)
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#define ISO_ht 0x09
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#define ISO_nl 0x0a
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#define ISO_cr 0x0d
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#define ISO_space 0x20
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#define ISO_bang 0x21
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#define ISO_citation 0x22
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#define ISO_ampersand 0x26
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#define ISO_citation2 0x27
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#define ISO_asterisk 0x2a
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#define ISO_dash 0x2d
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#define ISO_slash 0x2f
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#define ISO_semicolon 0x3b
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#define ISO_lt 0x3c
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#define ISO_eq 0x3d
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#define ISO_gt 0x3e
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#define ISO_rbrack 0x5b
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#define ISO_lbrack 0x5d
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#define MINORSTATE_NONE 0
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#define MINORSTATE_TEXT 1 /* Parse normal text */
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#define MINORSTATE_EXTCHAR 2 /* Check for semi-colon */
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#define MINORSTATE_TAG 3 /* Check for name of tag. */
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#define MINORSTATE_TAGEND 4 /* Scan for end of tag. */
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#define MINORSTATE_TAGATTR 5 /* Parse tag attr. */
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#define MINORSTATE_TAGATTRSPACE 6 /* Parse optional space after tag
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attr. */
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#define MINORSTATE_TAGATTRPARAM 7 /* Parse tag attr parameter. */
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#define MINORSTATE_TAGATTRPARAMNQ 8 /* Parse tag attr parameter without
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quotation marks. */
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#define MINORSTATE_HTMLCOMMENT 9 /* Scan for HTML comment end */
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#define MAJORSTATE_NONE 0
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#define MAJORSTATE_BODY 1
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#define MAJORSTATE_LINK 2
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#define MAJORSTATE_FORM 3
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#define MAJORSTATE_DISCARD 4
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struct htmlparser_state {
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unsigned char minorstate;
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char tag[20];
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unsigned char tagptr;
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char tagattr[20];
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unsigned char tagattrptr;
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char tagattrparam[WWW_CONF_MAX_URLLEN];
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unsigned char tagattrparamptr;
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unsigned char lastchar, quotechar;
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unsigned char majorstate, lastmajorstate;
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char linkurl[WWW_CONF_MAX_URLLEN];
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#define MAX_WORDLEN 40
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char word[MAX_WORDLEN];
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unsigned char wordlen;
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#if WWW_CONF_FORMS
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char formaction[WWW_CONF_MAX_FORMACTIONLEN];
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char formname[WWW_CONF_MAX_FORMNAMELEN];
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unsigned char inputtype;
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char inputname[WWW_CONF_MAX_INPUTNAMELEN];
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char inputvalue[WWW_CONF_MAX_INPUTVALUELEN];
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unsigned char inputvaluesize;
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#endif /* WWW_CONF_FORMS */
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};
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static struct htmlparser_state s;
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/*-----------------------------------------------------------------------------------*/
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static char last[1] = {0xff};
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static const char *tags[] = {
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#define TAG_FIRST 0
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#define TAG_SLASHA 0
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html_slasha,
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#define TAG_SLASHCENTER 1
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html_slashcenter,
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#define TAG_SLASHFORM 2
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html_slashform,
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#define TAG_SLASHH 3
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html_slashh,
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#define TAG_SLASHSCRIPT 4
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html_slashscript,
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#define TAG_SLASHSELECT 5
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html_slashselect,
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#define TAG_SLASHSTYLE 6
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html_slashstyle,
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#define TAG_A 7
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html_a,
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#define TAG_BODY 8
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html_body,
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#define TAG_BR 9
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html_br,
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#define TAG_CENTER 10
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html_center,
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#define TAG_FORM 11
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html_form,
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#define TAG_FRAME 12
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html_frame,
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#define TAG_H1 13
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html_h1,
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#define TAG_H2 14
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html_h2,
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#define TAG_H3 15
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html_h3,
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#define TAG_H4 16
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html_h4,
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#define TAG_IMG 17
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html_img,
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#define TAG_INPUT 18
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html_input,
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#define TAG_LI 19
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html_li,
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#define TAG_P 20
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html_p,
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#define TAG_SCRIPT 21
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html_script,
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#define TAG_SELECT 22
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html_select,
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#define TAG_STYLE 23
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html_style,
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#define TAG_TR 24
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html_tr,
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#define TAG_LAST 25
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last,
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};
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/*-----------------------------------------------------------------------------------*/
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static unsigned char CC_FASTCALL
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iswhitespace(char c)
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{
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return (c == ISO_space ||
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c == ISO_nl ||
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c == ISO_cr ||
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c == ISO_ht);
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}
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/*-----------------------------------------------------------------------------------*/
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void
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htmlparser_init(void)
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{
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s.majorstate = s.lastmajorstate = MAJORSTATE_DISCARD;
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s.minorstate = MINORSTATE_TEXT;
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s.lastchar = 0;
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}
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/*-----------------------------------------------------------------------------------*/
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static char CC_FASTCALL
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lowercase(char c)
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{
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/* XXX: This is a *brute force* approach to lower-case
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converting and should *not* be used anywhere else! It
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works for our purposes, however (i.e., HTML tags). */
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if(c > 0x40) {
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return (c & 0x1f) | 0x60;
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} else {
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return c;
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}
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}
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/*-----------------------------------------------------------------------------------*/
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static void
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endtagfound(void)
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{
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s.tag[s.tagptr] = 0;
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s.tagattr[s.tagattrptr] = 0;
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s.tagattrparam[s.tagattrparamptr] = 0;
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}
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/*-----------------------------------------------------------------------------------*/
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static void CC_FASTCALL
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switch_majorstate(unsigned char newstate)
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{
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if(s.majorstate != newstate) {
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PRINTF(("Switching state from %d to %d (%d)\n", s.majorstate, newstate, s.lastmajorstate));
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s.lastmajorstate = s.majorstate;
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s.majorstate = newstate;
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}
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}
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/*-----------------------------------------------------------------------------------*/
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static void CC_FASTCALL
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add_char(unsigned char c)
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{
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if(s.wordlen < MAX_WORDLEN &&
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c < 0x80) {
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s.word[s.wordlen] = c;
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++s.wordlen;
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if(s.wordlen == MAX_WORDLEN) {
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s.wordlen = MAX_WORDLEN - 1;
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}
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}
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}
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/*-----------------------------------------------------------------------------------*/
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static void
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do_word(void)
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{
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if(s.wordlen > 0) {
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if(s.majorstate == MAJORSTATE_LINK) {
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if(s.word[s.wordlen] != ISO_space) {
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add_char(ISO_space);
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}
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} else if(s.majorstate == MAJORSTATE_DISCARD) {
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s.wordlen = 0;
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} else {
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s.word[s.wordlen] = '\0';
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htmlparser_word(s.word, s.wordlen);
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s.wordlen = 0;
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}
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}
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}
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/*-----------------------------------------------------------------------------------*/
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static void
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newline(void)
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{
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do_word();
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htmlparser_newline();
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}
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/*-----------------------------------------------------------------------------------*/
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static unsigned char CC_FASTCALL
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find_tag(char *tag)
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{
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static unsigned char first, last, i, tabi;
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static char tagc;
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first = TAG_FIRST;
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last = TAG_LAST;
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i = 0;
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do {
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tagc = tag[i];
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if(tagc == 0 &&
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tags[first][i] == 0) {
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return first;
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}
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tabi = first;
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/* First, find first matching tag from table. */
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while(tagc > (tags[tabi])[i] &&
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tabi < last) {
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++tabi;
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}
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first = tabi;
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/* Second, find last matching tag from table. */
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while(tagc == (tags[tabi])[i] &&
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tabi < last) {
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++tabi;
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}
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last = tabi;
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/* If first and last matching tags are equal, we have a non-match
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and return. Else we continue with the next character. */
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++i;
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} while(last != first);
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return TAG_LAST;
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}
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/*-----------------------------------------------------------------------------------*/
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static void
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parse_tag(void)
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{
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static char *tagattrparam;
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static unsigned char size, i;
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static char dummy;
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PRINTF(("Parsing tag '%s' '%s' '%s'\n",
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s.tag, s.tagattr, s.tagattrparam));
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switch(find_tag(s.tag)) {
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case TAG_P:
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case TAG_H1:
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case TAG_H2:
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case TAG_H3:
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case TAG_H4:
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/* parse_char(ISO_nl);*/
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newline();
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/* FALLTHROUGH */
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case TAG_BR:
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case TAG_TR:
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case TAG_SLASHH:
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/* parse_char(ISO_nl);*/
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dummy = 0;
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newline();
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break;
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case TAG_LI:
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newline();
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add_char(ISO_asterisk);
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add_char(ISO_space);
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break;
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case TAG_SCRIPT:
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case TAG_STYLE:
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case TAG_SELECT:
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switch_majorstate(MAJORSTATE_DISCARD);
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break;
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case TAG_SLASHSCRIPT:
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case TAG_SLASHSTYLE:
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case TAG_SLASHSELECT:
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switch_majorstate(s.lastmajorstate);
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break;
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case TAG_BODY:
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s.majorstate = s.lastmajorstate = MAJORSTATE_BODY;
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break;
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case TAG_FRAME:
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if(strncmp(s.tagattr, html_src, sizeof(html_src)) == 0 &&
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s.tagattrparam[0] != 0) {
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switch_majorstate(MAJORSTATE_BODY);
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newline();
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add_char(ISO_rbrack);
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do_word();
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htmlparser_link((char *)html_frame, (unsigned char)strlen(html_frame), s.tagattrparam);
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PRINTF(("Frame [%s]\n", s.tagattrparam));
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add_char(ISO_lbrack);
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newline();
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}
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break;
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case TAG_IMG:
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if(strncmp(s.tagattr, html_alt, sizeof(html_alt)) == 0 &&
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s.tagattrparam[0] != 0) {
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/* parse_char(ISO_lt);*/
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add_char(ISO_lt);
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tagattrparam = &s.tagattrparam[0];
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while(*tagattrparam) {
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/* parse_char(*tagattrparam);*/
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add_char(*tagattrparam);
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++tagattrparam;
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}
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/* parse_char(ISO_gt);*/
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add_char(ISO_gt);
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do_word();
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}
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break;
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case TAG_A:
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PRINTF(("A %s %s\n", s.tagattr, s.tagattrparam));
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if(strncmp(s.tagattr, html_href, sizeof(html_href)) == 0 &&
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s.tagattrparam[0] != 0) {
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strcpy(s.linkurl, s.tagattrparam);
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do_word();
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switch_majorstate(MAJORSTATE_LINK);
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}
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break;
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case TAG_SLASHA:
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if(s.majorstate == MAJORSTATE_LINK) {
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switch_majorstate(s.lastmajorstate);
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s.word[s.wordlen] = 0;
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htmlparser_link(s.word, s.wordlen, s.linkurl);
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s.wordlen = 0;
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}
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break;
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#if WWW_CONF_FORMS
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case TAG_FORM:
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PRINTF(("Form tag\n"));
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switch_majorstate(MAJORSTATE_FORM);
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if(strncmp(s.tagattr, html_action, sizeof(html_action)) == 0) {
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PRINTF(("Form action '%s'\n", s.tagattrparam));
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strncpy(s.formaction, s.tagattrparam, WWW_CONF_MAX_FORMACTIONLEN - 1);
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} else if(strncmp(s.tagattr, html_name, sizeof(html_name)) == 0) {
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PRINTF(("Form name '%s'\n", s.tagattrparam));
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strncpy(s.formname, s.tagattrparam, WWW_CONF_MAX_FORMNAMELEN - 1);
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}
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s.inputname[0] = s.inputvalue[0] = 0;
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break;
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case TAG_SLASHFORM:
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switch_majorstate(MAJORSTATE_BODY);
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s.formaction[0] = s.formname[0] = 0;
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break;
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case TAG_INPUT:
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if(s.majorstate == MAJORSTATE_FORM) {
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/* First check if we are called at the end of an input tag. If
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so, we should render the input widget. */
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if(s.tagattr[0] == 0 &&
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s.inputname[0] != 0) {
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PRINTF(("Render input type %d\n", s.inputtype));
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switch(s.inputtype) {
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case HTMLPARSER_INPUTTYPE_NONE:
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case HTMLPARSER_INPUTTYPE_TEXT:
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for(i = 0; i < s.inputvaluesize; ++i) {
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if(s.inputvalue[i] == 0) {
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memset(&s.inputvalue[i], ISO_space, s.inputvaluesize - i);
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s.inputvalue[s.inputvaluesize] = 0;
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break;
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}
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}
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htmlparser_inputfield(s.inputvalue, s.inputname,
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s.formname, s.formaction);
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break;
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case HTMLPARSER_INPUTTYPE_SUBMIT:
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case HTMLPARSER_INPUTTYPE_IMAGE:
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htmlparser_submitbutton(s.inputvalue, s.inputname,
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s.formname, s.formaction);
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break;
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}
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s.inputtype = HTMLPARSER_INPUTTYPE_NONE;
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} else {
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PRINTF(("Input '%s' '%s'\n", s.tagattr, s.tagattrparam));
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if(strncmp(s.tagattr, html_type, sizeof(html_type)) == 0) {
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if(strncmp(s.tagattrparam, html_submit,
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sizeof(html_submit)) == 0) {
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s.inputtype = HTMLPARSER_INPUTTYPE_SUBMIT;
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} else if(strncmp(s.tagattrparam, html_image,
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sizeof(html_image)) == 0) {
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s.inputtype = HTMLPARSER_INPUTTYPE_IMAGE;
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} else if(strncmp(s.tagattrparam, html_text,
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sizeof(html_text)) == 0) {
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s.inputtype = HTMLPARSER_INPUTTYPE_TEXT;
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} else {
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s.inputtype = HTMLPARSER_INPUTTYPE_OTHER;
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}
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} else if(strncmp(s.tagattr, html_name,
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sizeof(html_name)) == 0) {
|
|
strncpy(s.inputname, s.tagattrparam,
|
|
WWW_CONF_MAX_INPUTNAMELEN);
|
|
} else if(strncmp(s.tagattr, html_alt,
|
|
sizeof(html_alt)) == 0 &&
|
|
s.inputtype == HTMLPARSER_INPUTTYPE_IMAGE) {
|
|
strncpy(s.inputvalue, s.tagattrparam,
|
|
WWW_CONF_MAX_INPUTVALUELEN);
|
|
} else if(strncmp(s.tagattr, html_value,
|
|
sizeof(html_value)) == 0) {
|
|
strncpy(s.inputvalue, s.tagattrparam,
|
|
WWW_CONF_MAX_INPUTVALUELEN);
|
|
} else if(strncmp(s.tagattr, html_size,
|
|
sizeof(html_size)) == 0) {
|
|
size = 0;
|
|
if(s.tagattrparam[0] >= '0' &&
|
|
s.tagattrparam[0] <= '9') {
|
|
size = s.tagattrparam[0] - '0';
|
|
if(s.tagattrparam[1] >= '0' &&
|
|
s.tagattrparam[1] <= '9') {
|
|
size = size * 10 + (s.tagattrparam[1] - '0');
|
|
}
|
|
}
|
|
if(size >= WWW_CONF_MAX_INPUTVALUELEN) {
|
|
size = WWW_CONF_MAX_INPUTVALUELEN - 1;
|
|
}
|
|
s.inputvaluesize = size;
|
|
/* strncpy(s.inputvalue, s.tagattrparam,
|
|
WWW_CONF_MAX_INPUTVALUELEN);*/
|
|
}
|
|
}
|
|
|
|
}
|
|
break;
|
|
#endif /* WWW_CONF_FORMS */
|
|
#if WWW_CONF_RENDERSTATE
|
|
case TAG_CENTER:
|
|
/* parse_char(ISO_nl); */
|
|
newline();
|
|
htmlparser_renderstate(HTMLPARSER_RENDERSTATE_BEGIN |
|
|
HTMLPARSER_RENDERSTATE_CENTER);
|
|
break;
|
|
case TAG_SLASHCENTER:
|
|
/* parse_char(ISO_nl);*/
|
|
newline();
|
|
htmlparser_renderstate(HTMLPARSER_RENDERSTATE_END |
|
|
HTMLPARSER_RENDERSTATE_CENTER);
|
|
break;
|
|
#endif /* WWW_CONF_RENDERSTATE */
|
|
}
|
|
}
|
|
/*-----------------------------------------------------------------------------------*/
|
|
static u16_t
|
|
parse_word(char *data, u8_t dlen)
|
|
{
|
|
static u8_t i;
|
|
static u8_t len;
|
|
unsigned char c;
|
|
|
|
len = dlen;
|
|
|
|
switch(s.minorstate) {
|
|
case MINORSTATE_TEXT:
|
|
for(i = 0; i < len; ++i) {
|
|
c = data[i];
|
|
if(iswhitespace(c)) {
|
|
do_word();
|
|
} else if(c == ISO_lt) {
|
|
s.minorstate = MINORSTATE_TAG;
|
|
s.tagptr = 0;
|
|
/* do_word();*/
|
|
break;
|
|
} else if(c == ISO_ampersand) {
|
|
s.minorstate = MINORSTATE_EXTCHAR;
|
|
break;
|
|
} else {
|
|
add_char(c);
|
|
}
|
|
}
|
|
break;
|
|
case MINORSTATE_EXTCHAR:
|
|
for(i = 0; i < len; ++i) {
|
|
c = data[i];
|
|
if(c == ISO_semicolon) {
|
|
s.minorstate = MINORSTATE_TEXT;
|
|
add_char(' ');
|
|
break;
|
|
} else if(iswhitespace(c)) {
|
|
s.minorstate = MINORSTATE_TEXT;
|
|
add_char('&');
|
|
add_char(' ');
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
case MINORSTATE_TAG:
|
|
/* We are currently parsing within the name of a tag. We check
|
|
for the end of a tag (the '>' character) or whitespace (which
|
|
indicates that we should parse a tag attr argument
|
|
instead). */
|
|
for(i = 0; i < len; ++i) {
|
|
c = data[i];
|
|
if(c == ISO_gt) {
|
|
/* Full tag found. We continue parsing regular text. */
|
|
s.minorstate = MINORSTATE_TEXT;
|
|
s.tagattrptr = s.tagattrparamptr = 0;
|
|
endtagfound();
|
|
parse_tag();
|
|
break;
|
|
} else if(iswhitespace(c)) {
|
|
/* The name of the tag found. We continue parsing the tag
|
|
attr.*/
|
|
s.minorstate = MINORSTATE_TAGATTR;
|
|
s.tagattrptr = 0;
|
|
endtagfound();
|
|
break;
|
|
} else {
|
|
/* Keep track of the name of the tag, but convert it to
|
|
lower case. */
|
|
|
|
s.tag[s.tagptr] = lowercase(c);
|
|
++s.tagptr;
|
|
/* Check if the ->tag field is full. If so, we just eat up
|
|
any data left in the tag. */
|
|
if(s.tagptr == sizeof(s.tag)) {
|
|
s.minorstate = MINORSTATE_TAGEND;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Check for HTML comment, indicated by <!-- */
|
|
if(s.tagptr == 3 &&
|
|
s.tag[0] == ISO_bang &&
|
|
s.tag[1] == ISO_dash &&
|
|
s.tag[2] == ISO_dash) {
|
|
PRINTF(("Starting comment...\n"));
|
|
s.minorstate = MINORSTATE_HTMLCOMMENT;
|
|
s.tagptr = 0;
|
|
endtagfound();
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
case MINORSTATE_TAGATTR:
|
|
/* We parse the "tag attr", i.e., the "href" in <a
|
|
href="...">. */
|
|
for(i = 0; i < len; ++i) {
|
|
c = data[i];
|
|
if(c == ISO_gt) {
|
|
/* Full tag found. */
|
|
s.minorstate = MINORSTATE_TEXT;
|
|
s.tagattrparamptr = 0;
|
|
s.tagattrptr = 0;
|
|
endtagfound();
|
|
parse_tag();
|
|
s.tagptr = 0;
|
|
endtagfound();
|
|
break;
|
|
} else if(iswhitespace(c)) {
|
|
if(s.tagattrptr == 0) {
|
|
/* Discard leading spaces. */
|
|
} else {
|
|
/* A non-leading space is the end of the attribute. */
|
|
s.tagattrparamptr = 0;
|
|
endtagfound();
|
|
parse_tag();
|
|
s.minorstate = MINORSTATE_TAGATTRSPACE;
|
|
break;
|
|
/* s.tagattrptr = 0;
|
|
endtagfound();*/
|
|
}
|
|
} else if(c == ISO_eq) {
|
|
s.minorstate = MINORSTATE_TAGATTRPARAMNQ;
|
|
s.tagattrparamptr = 0;
|
|
endtagfound();
|
|
break;
|
|
} else {
|
|
s.tagattr[s.tagattrptr] = lowercase(c);
|
|
++s.tagattrptr;
|
|
/* Check if the "tagattr" field is full. If so, we just eat
|
|
up any data left in the tag. */
|
|
if(s.tagattrptr == sizeof(s.tagattr)) {
|
|
s.minorstate = MINORSTATE_TAGEND;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
case MINORSTATE_TAGATTRSPACE:
|
|
for(i = 0; i < len; ++i) {
|
|
c = data[i];
|
|
if(iswhitespace(c)) {
|
|
/* Discard spaces. */
|
|
} else if(c == ISO_eq) {
|
|
s.minorstate = MINORSTATE_TAGATTRPARAMNQ;
|
|
s.tagattrparamptr = 0;
|
|
endtagfound();
|
|
parse_tag();
|
|
break;
|
|
} else {
|
|
s.tagattr[0] = lowercase(c);
|
|
s.tagattrptr = 1;
|
|
s.minorstate = MINORSTATE_TAGATTR;
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
case MINORSTATE_TAGATTRPARAMNQ:
|
|
/* We are parsing the "tag attr parameter", i.e., the link part
|
|
in <a href="link">. */
|
|
for(i = 0; i < len; ++i) {
|
|
c = data[i];
|
|
if(c == ISO_gt) {
|
|
/* Full tag found. */
|
|
endtagfound();
|
|
parse_tag();
|
|
s.minorstate = MINORSTATE_TEXT;
|
|
s.tagattrptr = 0;
|
|
endtagfound();
|
|
parse_tag();
|
|
s.tagptr = 0;
|
|
endtagfound();
|
|
break;
|
|
} else if(iswhitespace(c) &&
|
|
s.tagattrparamptr == 0) {
|
|
/* Discard leading spaces. */
|
|
} else if((c == ISO_citation ||
|
|
c == ISO_citation2) &&
|
|
s.tagattrparamptr == 0) {
|
|
s.minorstate = MINORSTATE_TAGATTRPARAM;
|
|
s.quotechar = c;
|
|
PRINTF(("tag attr param q found\n"));
|
|
break;
|
|
} else if(iswhitespace(c)) {
|
|
PRINTF(("Non-leading space found at %d\n",
|
|
s.tagattrparamptr));
|
|
/* Stop parsing if a non-leading space was found */
|
|
endtagfound();
|
|
parse_tag();
|
|
|
|
s.minorstate = MINORSTATE_TAGATTR;
|
|
s.tagattrptr = 0;
|
|
endtagfound();
|
|
break;
|
|
} else {
|
|
s.tagattrparam[s.tagattrparamptr] = c;
|
|
++s.tagattrparamptr;
|
|
/* Check if the "tagattr" field is full. If so, we just eat
|
|
up any data left in the tag. */
|
|
if(s.tagattrparamptr >= sizeof(s.tagattrparam) - 1) {
|
|
s.minorstate = MINORSTATE_TAGEND;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
case MINORSTATE_TAGATTRPARAM:
|
|
/* We are parsing the "tag attr parameter", i.e., the link
|
|
part in <a href="link">. */
|
|
for(i = 0; i < len; ++i) {
|
|
c = data[i];
|
|
if(c == s.quotechar) {
|
|
/* Found end of tag attr parameter. */
|
|
endtagfound();
|
|
parse_tag();
|
|
|
|
s.minorstate = MINORSTATE_TAGATTR;
|
|
s.tagattrptr = 0;
|
|
endtagfound();
|
|
break;
|
|
} else {
|
|
if(iswhitespace(c)) {
|
|
s.tagattrparam[s.tagattrparamptr] = ISO_space;
|
|
} else {
|
|
s.tagattrparam[s.tagattrparamptr] = c;
|
|
}
|
|
|
|
++s.tagattrparamptr;
|
|
/* Check if the "tagattr" field is full. If so, we just eat
|
|
up any data left in the tag. */
|
|
if(s.tagattrparamptr >= sizeof(s.tagattrparam) - 1) {
|
|
s.minorstate = MINORSTATE_TAGEND;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
case MINORSTATE_HTMLCOMMENT:
|
|
for(i = 0; i < len; ++i) {
|
|
c = data[i];
|
|
if(c == ISO_dash) {
|
|
++s.tagptr;
|
|
} else if(c == ISO_gt && s.tagptr > 0) {
|
|
PRINTF(("Comment done.\n"));
|
|
s.minorstate = MINORSTATE_TEXT;
|
|
break;
|
|
} else {
|
|
s.tagptr = 0;
|
|
}
|
|
}
|
|
break;
|
|
case MINORSTATE_TAGEND:
|
|
/* Discard characters until a '>' is seen. */
|
|
for(i = 0; i < len; ++i) {
|
|
if(data[i] == ISO_gt) {
|
|
s.minorstate = MINORSTATE_TEXT;
|
|
s.tagattrptr = 0;
|
|
endtagfound();
|
|
parse_tag();
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
i = 0;
|
|
break;
|
|
}
|
|
if(i >= len) {
|
|
return len;
|
|
}
|
|
return i + 1;
|
|
}
|
|
/*-----------------------------------------------------------------------------------*/
|
|
void
|
|
htmlparser_parse(char *data, u16_t datalen)
|
|
{
|
|
u16_t plen;
|
|
|
|
while(datalen > 0) {
|
|
if(datalen > 255) {
|
|
plen = parse_word(data, 255);
|
|
} else {
|
|
plen = parse_word(data, (u8_t)datalen);
|
|
}
|
|
datalen -= plen;
|
|
data += plen;
|
|
}
|
|
}
|
|
/*-----------------------------------------------------------------------------------*/
|