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ncsa-mosaic/libhtmlw/HTMLparse.c

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/****************************************************************************
* NCSA Mosaic for the X Window System *
* Software Development Group *
* National Center for Supercomputing Applications *
* University of Illinois at Urbana-Champaign *
* 605 E. Springfield, Champaign IL 61820 *
* mosaic@ncsa.uiuc.edu *
* *
* Copyright (C) 1993, Board of Trustees of the University of Illinois *
* *
* NCSA Mosaic software, both binary and source (hereafter, Software) is *
* copyrighted by The Board of Trustees of the University of Illinois *
* (UI), and ownership remains with the UI. *
* *
* The UI grants you (hereafter, Licensee) a license to use the Software *
* for academic, research and internal business purposes only, without a *
* fee. Licensee may distribute the binary and source code (if released) *
* to third parties provided that the copyright notice and this statement *
* appears on all copies and that no charge is associated with such *
* copies. *
* *
* Licensee may make derivative works. However, if Licensee distributes *
* any derivative work based on or derived from the Software, then *
* Licensee will (1) notify NCSA regarding its distribution of the *
* derivative work, and (2) clearly notify users that such derivative *
* work is a modified version and not the original NCSA Mosaic *
* distributed by the UI. *
* *
* Any Licensee wishing to make commercial use of the Software should *
* contact the UI, c/o NCSA, to negotiate an appropriate license for such *
* commercial use. Commercial use includes (1) integration of all or *
* part of the source code into a product for sale or license by or on *
* behalf of Licensee to third parties, or (2) distribution of the binary *
* code or source code to third parties that need it to utilize a *
* commercial product sold or licensed by or on behalf of Licensee. *
* *
* UI MAKES NO REPRESENTATIONS ABOUT THE SUITABILITY OF THIS SOFTWARE FOR *
* ANY PURPOSE. IT IS PROVIDED "AS IS" WITHOUT EXPRESS OR IMPLIED *
* WARRANTY. THE UI SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY THE *
* USERS OF THIS SOFTWARE. *
* *
* By using or copying this Software, Licensee agrees to abide by the *
* copyright law and all other applicable laws of the U.S. including, but *
* not limited to, export control laws, and the terms of this license. *
* UI shall have the right to terminate this license immediately by *
* written notice upon Licensee's breach of, or non-compliance with, any *
* of its terms. Licensee may be held legally responsible for any *
* copyright infringement that is caused or encouraged by Licensee's *
* failure to abide by the terms of this license. *
* *
* Comments and questions are welcome and can be sent to *
* mosaic-x@ncsa.uiuc.edu. *
****************************************************************************/
#include "../config.h"
#ifndef VMS
#include <sys/time.h>
struct timeval Tv;
struct timezone Tz;
#else
#include <time.h>
#endif
#include <stdio.h>
#include <ctype.h>
#ifndef sun
/* To get atoi. */
#include <stdlib.h>
#endif
#include "HTML.h"
#include "HTMLamp.h"
extern void FreeObjList();
extern struct mark_up *AddObj();
int NoBodyColors(Widget w);
int NoBodyImages(Widget w);
char *ParseMarkTag();
extern int tableSupportEnabled;
#ifndef DISABLE_TRACE
extern int htmlwTrace;
#endif
#ifdef NOT_ASCII
#define TOLOWER(x) (tolower(x))
#else
/*
* A hack to speed up caseless_equal. Thanks to Quincey Koziol for
* developing it for me
*/
unsigned char map_table[256]={
0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,
24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,
45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,97,98,
99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,
116,117,118,119,120,121,122,91,92,93,94,95,96,97,98,99,100,101,102,
103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,
120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,
137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,
154,155,156,157,158,159,160,161,162,163,164,165,166,167,168,169,170,
171,172,173,174,175,176,177,178,179,180,181,182,183,184,185,186,187,
188,189,190,191,192,193,194,195,196,197,198,199,200,201,202,203,204,
205,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,
222,223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,
239,240,241,242,243,244,245,246,247,248,249,250,251,252,253,254,255};
#define TOLOWER(x) (map_table[x])
#endif /* NOT_ASCII */
/*
* Check if two strings are equal, ignoring case.
* The strings must be of the same length to be equal.
* return 1 if equal, 0 otherwise.
*/
int
caseless_equal(str1, str2)
char *str1;
char *str2;
{
if ((str1 == NULL)||(str2 == NULL))
{
return(0);
}
while ((*str1 != '\0')&&(*str2 != '\0'))
{
if (TOLOWER(*str1) != TOLOWER(*str2))
{
return(0);
}
str1++;
str2++;
}
if ((*str1 == '\0')&&(*str2 == '\0'))
{
return(1);
}
else
{
return(0);
}
}
/*
* Check if two strings are equal in the first count characters, ignoring case.
* The strings must both be at least of length count to be equal.
* return 1 if equal, 0 otherwise.
*/
int
caseless_equal_prefix(str1, str2, cnt)
char *str1;
char *str2;
int cnt;
{
int i;
if ((str1 == NULL)||(str2 == NULL))
{
return(0);
}
if (cnt < 1)
{
return(1);
}
for (i=0; i < cnt; i++)
{
if (TOLOWER(*str1) != TOLOWER(*str2))
{
return(0);
}
str1++;
str2++;
}
return(1);
}
/*
* Clean up the white space in a string.
* Remove all leading and trailing whitespace, and turn all
* internal whitespace into single spaces separating words.
* The cleaning is done by rearranging the chars in the passed
* txt buffer. The resultant string will probably be shorter,
* it can never get longer.
*/
void
clean_white_space(txt)
char *txt;
{
char *ptr;
char *start;
start = txt;
ptr = txt;
/*
* Remove leading white space
*/
while (isspace((int)*ptr))
{
ptr++;
}
/*
* find a word, copying if we removed some space already
*/
if (start == ptr)
{
while ((!isspace((int)*ptr))&&(*ptr != '\0'))
{
ptr++;
}
start = ptr;
}
else
{
while ((!isspace((int)*ptr))&&(*ptr != '\0'))
{
*start++ = *ptr++;
}
}
while (*ptr != '\0')
{
/*
* Remove trailing whitespace.
*/
while (isspace((int)*ptr))
{
ptr++;
}
if (*ptr == '\0')
{
break;
}
/*
* If there are more words, insert a space and if space was
* removed move up remaining text.
*/
*start++ = ' ';
if (start == ptr)
{
while ((!isspace((int)*ptr))&&(*ptr != '\0'))
{
ptr++;
}
start = ptr;
}
else
{
while ((!isspace((int)*ptr))&&(*ptr != '\0'))
{
*start++ = *ptr++;
}
}
}
*start = '\0';
}
/*
* parse an amperstand escape, and return the appropriate character, or
* '\0' on error.
* we should really only use caseless_equal_prefix for unterminated, and use
* caseless_equal otherwise, but since there are so many escapes, and I
* don't want to type everything twice, I always use caseless_equal_prefix
* Turns out the escapes are case sensitive, use strncmp.
* termination states:
* 0: terminated with a ';'
* 1: unterminated
* 2: terminated with whitespace
*/
char
ExpandEscapes(esc, endp, termination)
char *esc;
char **endp;
int termination;
{
int cnt;
char val;
int unterminated;
unterminated = (termination & 0x01);
esc++;
if (*esc == '#')
{
if (unterminated)
{
char *tptr;
char tchar;
tptr = (char *)(esc + 1);
while (isdigit((int)*tptr))
{
tptr++;
}
tchar = *tptr;
*tptr = '\0';
val = (char)atoi((esc + 1));
*tptr = tchar;
*endp = tptr;
}
else
{
val = (char)atoi((esc + 1));
*endp = (char *)(esc + strlen(esc));
}
}
else
{
int escLen, ampLen;
cnt = 0;
escLen = strlen(esc);
while (AmpEscapes[cnt].tag != NULL)
{
ampLen = strlen(AmpEscapes[cnt].tag);
if ((escLen == ampLen) && (strncmp(esc, AmpEscapes[cnt].tag, ampLen) == 0))
{
val = AmpEscapes[cnt].value;
*endp = (char *)(esc +
strlen(AmpEscapes[cnt].tag));
break;
}
cnt++;
}
if (AmpEscapes[cnt].tag == NULL)
{
#ifndef DISABLE_TRACE
if (htmlwTrace) {
fprintf(stderr, "Error bad & string\n");
}
#endif
val = '\0';
*endp = (char *)NULL;
}
}
return(val);
}
/*
* Clean the special HTML character escapes out of the text and replace
* them with the appropriate characters "&lt;" = "<", "&gt;" = ">",
* "&amp;" = "&"
* GAG: apperantly &lt etc. can be left unterminated, what a nightmare.
* Ok, better, they have to be terminated with white-space or ';'.
* the '&' character must be immediately followed by a letter to be
* a valid escape sequence. Other &'s are left alone.
* The cleaning is done by rearranging chars in the passed txt buffer.
* if any escapes are replaced, the string becomes shorter.
*/
void
clean_text(txt)
char *txt;
{
int unterminated;
int space_terminated;
char *ptr;
char *ptr2;
char *start;
char *text;
char *tend;
char tchar;
char val;
if (txt == NULL)
{
return;
}
/*
* Quick scan to find escape sequences.
* Escape is '&' followed by a letter (or a hash mark).
* return if there are none.
*/
ptr = txt;
while (*ptr != '\0')
{
if ((*ptr == '&')&&
((isalpha((int)*(ptr + 1)))||(*(ptr + 1) == '#')))
{
break;
}
ptr++;
}
if (*ptr == '\0')
{
return;
}
/*
* Loop, replaceing escape sequences, and moving up remaining
* text.
*/
ptr2 = ptr;
while (*ptr != '\0')
{
unterminated = 0;
space_terminated = 0;
/*
* Extract the escape sequence from start to ptr
*/
start = ptr;
while ((*ptr != ';')&&(!isspace((int)*ptr))&&(*ptr != '\0'))
{
ptr++;
}
if (*ptr == '\0')
{
#ifndef DISABLE_TRACE
if (htmlwTrace) {
fprintf(stderr, "warning: unterminated & (%s)\n",
start);
}
#endif
unterminated = 1;
}
else if (isspace((int)*ptr))
{
space_terminated = 1;
}
/*
* Copy the escape sequence into a separate buffer.
* Then clean spaces so the "& lt ;" = "&lt;" etc.
* The cleaning should be unnecessary.
*/
tchar = *ptr;
*ptr = '\0';
text = (char *)malloc(strlen(start) + 1);
if (text == NULL)
{
#ifndef DISABLE_TRACE
if (htmlwTrace) {
fprintf(stderr, "Cannot malloc space for & text\n");
}
#endif
*ptr = tchar;
return;
}
strcpy(text, start);
*ptr = tchar;
clean_white_space(text);
/*
* Replace escape sequence with appropriate character
*/
val = ExpandEscapes(text, &tend,
((space_terminated << 1) + unterminated));
if (val != '\0')
{
if (unterminated)
{
tchar = *tend;
*tend = '\0';
ptr = (char *)(start + strlen(text) - 1);
*tend = tchar;
}
else if (space_terminated)
{
ptr--;
}
*ptr2 = val;
unterminated = 0;
space_terminated = 0;
}
/*
* invalid escape sequence. skip it.
*/
else
{
#ifndef DISABLE_TRACE
if (htmlwTrace) {
fprintf(stderr, "Error bad & string\n");
}
#endif
ptr = start;
*ptr2 = *ptr;
}
free(text);
/*
* Copy forward remaining text until you find the next
* escape sequence
*/
ptr2++;
ptr++;
while (*ptr != '\0')
{
if ((*ptr == '&')&&
((isalpha((int)*(ptr + 1)))||(*(ptr + 1) == '#')))
{
break;
}
*ptr2++ = *ptr++;
}
}
*ptr2 = '\0';
}
/*
* Get a block of text from a HTML document.
* All text from start to the end, or the first mark
* (a mark is '<' or '</' followed by any letter or a '!')
* is returned in a malloced buffer. Also, endp returns
* a pointer to the next '<' or '\0'
* The returned text has already expanded '&' escapes.
*/
char *
get_text(start, endp)
char *start;
char **endp;
{
char *ptr;
char *text;
char tchar;
if (start == NULL)
{
return(NULL);
}
/*
* Copy text up to beginning of a mark, or the end
*/
ptr = start;
while (*ptr != '\0')
{
if (*ptr == '<')
{
if (isalpha((int)(*(ptr + 1))))
{
break;
}
else if (*(ptr + 1) == '/')
{
if (isalpha((int)(*(ptr + 2))))
{
break;
}
}
else if (*(ptr + 1) == '!') /* a comment */
{
break;
}
}
ptr++;
}
*endp = ptr;
if (ptr == start)
{
return(NULL);
}
/*
* Copy the text into its own buffer, and clean it
* of escape sequences.
*/
tchar = *ptr;
*ptr = '\0';
text = (char *)malloc(strlen(start) + 1);
if (text == NULL)
{
#ifndef DISABLE_TRACE
if (htmlwTrace) {
fprintf(stderr, "Cannot malloc space for text\n");
}
#endif
*ptr = tchar;
return(NULL);
}
strcpy(text, start);
*ptr = tchar;
clean_text(text);
return(text);
}
/*
* Get the mark text between '<' and '>'. From the text, determine
* its type, and fill in a mark_up structure to return. Also returns
* endp pointing to the ttrailing '>' in the original string.
*/
struct mark_up *
get_mark(start, endp)
char *start;
char **endp;
{
char *ptr;
char *text;
char tchar;
struct mark_up *mark;
int comment=0; /* amb - comment==1 if we are in a comment */
char *first_gt=NULL; /* keep track of ">" for old broken comments */
if (start == NULL)
{
return(NULL);
}
if (*start != '<')
{
return(NULL);
}
/* amb - check if we are in a comment, start tag is <!-- */
if (strncmp (start, "<!--", 4)==0)
comment=1;
start++;
first_gt = NULL;
mark = (struct mark_up *)malloc(sizeof(struct mark_up));
if (mark == NULL)
{
#ifndef DISABLE_TRACE
if (htmlwTrace) {
fprintf(stderr, "Cannot malloc space for mark_up struct\n");
}
#endif
return(NULL);
}
/*
* Grab the mark text
*/
ptr = start;
/* amb - skip over the comment text */
/* end tag is --*>, where * is zero or more spaces (ugh) */
if (comment)
{
while (*ptr != '\0')
{
if ( (*ptr == '>') && (!first_gt) )
first_gt = ptr;
if (strncmp (ptr, "--", 2) == 0) /* found double dash (--) */
{
ptr += 2;
while ((*ptr != '\0') && ((*ptr == ' ') || (*ptr == '\n')
|| (*ptr == '-') ))
ptr++; /* skip spaces and newlines */
if (*ptr == '>') /* completed end comment */
{
*endp = ptr;
mark->is_end = 1;
mark->type = M_COMMENT;
mark->start = NULL;
mark->text = NULL;
mark->end = NULL;
mark->next = NULL;
return(mark);
}
}
else /* if no double dash (--) found */
ptr++;
}
/* if we get here, this document must use the old broken
comment style */
if (first_gt) {
ptr = first_gt;
}
} /* end of: if (comment) */
while (ptr&&(*ptr != '>')&&(*ptr != '\0'))
{
ptr++;
}
if (ptr) {
*endp=ptr;
}
else {
return(NULL); /*only if EOF and no close comment -- SWP*/
}
if (*ptr != '>')
{
#ifndef DISABLE_TRACE
if (htmlwTrace) {
fprintf(stderr, "error: bad mark format\n");
}
#endif
return(NULL);
}
/*
* Copy the mark text to its own buffer, and
* clean it of escapes, and odd white space.
*/
tchar = *ptr;
*ptr = '\0';
text = (char *)malloc(strlen(start) + 1);
if (text == NULL)
{
#ifndef DISABLE_TRACE
if (htmlwTrace) {
fprintf(stderr, "Cannot malloc space for mark\n");
}
#endif
*ptr = tchar;
return(NULL);
}
strcpy(text, start);
*ptr = tchar;
clean_text(text);
/*
* No longer needed because the parsing code is now smarter
*
clean_white_space(text);
*
*/
/*
* Set whether this is the start or end of a mark
* block, as well as determining its type.
*/
if (*text == '/')
{
mark->is_end = 1;
mark->type = ParseMarkType((char *)(text + 1));
mark->start = NULL;
mark->text = NULL;
mark->end = text;
}
else
{
mark->is_end = 0;
mark->type = ParseMarkType(text);
mark->start = text;
mark->text = NULL;
mark->end = NULL;
}
mark->text = NULL;
mark->next = NULL;
return(mark);
}
/*
* Special version of get_text. It reads all text up to the
* end of the plain text mark, or the end of the file.
*/
char *
get_plain_text(start, endp)
char *start;
char **endp;
{
char *ptr;
char *text;
char tchar;
if (start == NULL)
{
return(NULL);
}
/*
* Read until stopped by end plain text mark.
*/
ptr = start;
while (*ptr != '\0')
{
/*
* Beginning of a mark is '<' followed by any letter,
* or followed by '!' for a comment,
* or '</' followed by any letter.
*/
if ((*ptr == '<')&&
((isalpha((int)(*(ptr + 1))))||
(*(ptr + 1) == '!')||
((*(ptr + 1) == '/')&&(isalpha((int)(*(ptr + 2)))))))
{
struct mark_up *mp;
char *ep;
/*
* We think we found a mark. If it is the
* end of plain text, break out
*/
mp = get_mark(ptr, &ep);
if (mp != NULL)
{
if (((mp->type == M_PLAIN_TEXT)||
(mp->type == M_LISTING_TEXT))&&(mp->is_end))
{
if (mp->end != NULL)
{
free((char *)mp->end);
}
free((char *)mp);
break;
}
if (mp->start != NULL)
{
free((char *)mp->start);
}
if (mp->end != NULL)
{
free((char *)mp->end);
}
free((char *)mp);
}
}
ptr++;
}
*endp = ptr;
if (ptr == start)
{
return(NULL);
}
/*
* Copy text to its own malloced buffer, and clean it of
* HTML escapes.
*/
tchar = *ptr;
*ptr = '\0';
text = (char *)malloc(strlen(start) + 1);
if (text == NULL)
{
#ifndef DISABLE_TRACE
if (htmlwTrace) {
fprintf(stderr, "Cannot malloc space for text\n");
}
#endif
*ptr = tchar;
return(NULL);
}
strcpy(text, start);
*ptr = tchar;
clean_text(text);
return(text);
}
static char *atts[]={"text","bgcolor","alink","vlink","link",NULL};
/*
* Main parser of HTML text. Takes raw text, and produces a linked
* list of mark objects. Mark objects are either text strings, or
* starting and ending mark delimiters.
* The old list is passed in so it can be freed, and in the future we
* may want to add code to append to the old list.
*/
struct mark_up *
HTMLParse(old_list, str, hw)
struct mark_up *old_list;
char *str;
void *hw;
{
int preformat;
char *start, *end;
char *text, *tptr;
struct mark_up *mark;
struct mark_up *list;
struct mark_up *current;
#ifndef DISABLE_TRACE
if (htmlwTrace) {
#ifndef VMS
gettimeofday(&Tv, &Tz);
fprintf(stderr, "HTMLParse enter (%d.%d)\n", Tv.tv_sec, Tv.tv_usec);
#else
fprintf(stderr, "HTMLParse enter (%s)\n", asctime(localtime(&clock)));
#endif
}
#endif
preformat = 0;
/*
* Free up the previous Object List if one exists
*/
FreeObjList(old_list);
if (str == NULL)
{
return(NULL);
}
list = NULL;
current = NULL;
start = str;
end = str;
mark = NULL;
while (*start != '\0')
{
/*
* Get some text (if any). If our last mark was
* a begin plain text we call different function
* If last mark was <PLAINTEXT> we lump all the rest of
* the text in.
*/
if ((mark != NULL)&&(mark->type == M_PLAIN_FILE)&&
(!mark->is_end))
{
text = start;
end = text;
while (*end != '\0')
{
end++;
}
/*
* Copy text to its own malloced buffer, and clean it of
* HTML escapes.
*/
tptr = (char *)malloc(strlen(text) + 1);
if (tptr == NULL)
{
#ifndef DISABLE_TRACE
if (htmlwTrace) {
fprintf(stderr,
"Cannot malloc space for text\n");
}
#endif
return(list);
}
strcpy(tptr, text);
text = tptr;
}
else if ((mark != NULL)&&
((mark->type == M_PLAIN_TEXT)||
(mark->type == M_LISTING_TEXT))&&
(!mark->is_end))
{
text = get_plain_text(start, &end);
}
else
{
text = get_text(start, &end);
}
/*
* If text is OK, put it into a mark structure, and add
* it to the linked list.
*/
if (text == NULL)
{
if (start != end)
{
#ifndef DISABLE_TRACE
if (htmlwTrace) {
fprintf(stderr, "error parsing text, bailing out\n");
}
#endif
return(list);
}
}
else
{
mark = (struct mark_up *)malloc(sizeof(struct mark_up));
if (mark == NULL)
{
#ifndef DISABLE_TRACE
if (htmlwTrace) {
fprintf(stderr, "Cannot malloc for mark_up struct\n");
}
#endif
return(list);
}
mark->type = M_NONE;
mark->is_end = 0;
mark->start = NULL;
mark->text = text;
mark->end = NULL;
mark->next = NULL;
current = AddObj(&list, current, mark, preformat);
}
start = end;
if (*start == '\0')
{
break;
}
/*
* Get the next mark if any, and if it is
* valid, add it to the linked list.
*/
mark = get_mark(start, &end);
if (mark == NULL)
{
if (start != end)
{
#ifndef DISABLE_TRACE
if (htmlwTrace) {
fprintf(stderr, "error parsing mark, bailing out\n");
}
#endif
return(list);
}
}
else
{
/* WE SUCK. We're a bunch of pathetic followers. */
/* ABSOLUTE CHEEZE OF THE FINEST KIND - bjs - 9/21/95 */
if(mark->type==M_DOC_BODY && mark->start){
char *tmp=NULL,*tmp_bgname=NULL;
int i;
if (!NoBodyImages(hw)) {
tmp_bgname=ParseMarkTag(mark->start,
MT_DOC_BODY,
"background");
}
if (!NoBodyColors(hw)) {
for(i=0;atts[i];i++) {
tmp=ParseMarkTag(mark->start,
MT_DOC_BODY,atts[i]);
if (tmp) {
hw_do_color(hw,atts[i],tmp);
free(tmp);
tmp=NULL;
}
}
}
if (tmp_bgname) {
hw_do_bg(hw,tmp_bgname);
free(tmp_bgname);
tmp_bgname=NULL;
}
}
mark->next = NULL;
current = AddObj(&list, current, mark, preformat);
}
start = (char *)(end + 1);
if ((mark != NULL)&&(mark->type == M_PLAIN_FILE)&&
(!mark->is_end))
{
/*
* A linefeed immediately after the <PLAINTEXT>
* mark is to be ignored.
*/
if (*start == '\n')
{
start++;
}
}
else if ((mark != NULL)&&((mark->type == M_PLAIN_TEXT)||
(mark->type == M_LISTING_TEXT))&&
(!mark->is_end))
{
/*
* A linefeed immediately after the <XMP>
* or <LISTING> mark is to be ignored.
*/
if (*start == '\n')
{
start++;
}
}
/*
* If we are parsing pre-formatted text we need to set a
* flag so we don't throw out needed linefeeds.
*/
else if ((mark != NULL)&&(mark->type == M_PREFORMAT))
{
if (mark->is_end)
{
preformat = 0;
}
else
{
preformat = 1;
/*
* A linefeed immediately after the <PRE>
* mark is to be ignored.
*/
if (*start == '\n')
{
start++;
}
}
}
}
#ifndef DISABLE_TRACE
if (htmlwTrace) {
#ifndef VMS
gettimeofday(&Tv, &Tz);
fprintf(stderr, "HTMLParse exit (%d.%d)\n", Tv.tv_sec, Tv.tv_usec);
#else
fprintf(stderr, "HTMLParse exit (%s)\n", asctime(localtime(&clock)));
#endif
}
#endif
return(list);
}
/*
* Determine mark type from the identifying string passed
*/
int
ParseMarkType(str)
char *str;
{
int type;
char *tptr;
char tchar;
if (str == NULL)
{
return(M_NONE);
}
type = M_UNKNOWN;
tptr = str;
while (*tptr != '\0')
{
if (isspace((int)*tptr))
{
break;
}
tptr++;
}
tchar = *tptr;
*tptr = '\0';
if (caseless_equal(str, MT_ANCHOR))
{
type = M_ANCHOR;
}
else if (caseless_equal(str, MT_FRAME))
{
type = M_FRAME;
}
else if (caseless_equal(str, MT_TITLE))
{
type = M_TITLE;
}
else if (caseless_equal(str, MT_FIXED))
{
type = M_FIXED;
}
else if (caseless_equal(str, MT_BOLD))
{
type = M_BOLD;
}
else if (caseless_equal(str, MT_ITALIC))
{
type = M_ITALIC;
}
else if (caseless_equal(str, MT_EMPHASIZED))
{
type = M_EMPHASIZED;
}
else if (caseless_equal(str, MT_STRONG))
{
type = M_STRONG;
}
else if (caseless_equal(str, MT_CODE))
{
type = M_CODE;
}
else if (caseless_equal(str, MT_SAMPLE))
{
type = M_SAMPLE;
}
else if (caseless_equal(str, MT_KEYBOARD))
{
type = M_KEYBOARD;
}
else if (caseless_equal(str, MT_VARIABLE))
{
type = M_VARIABLE;
}
else if (caseless_equal(str, MT_CITATION))
{
type = M_CITATION;
}
else if (caseless_equal(str, MT_STRIKEOUT))
{
type = M_STRIKEOUT;
}
else if (caseless_equal(str, MT_HEADER_1))
{
type = M_HEADER_1;
}
else if (caseless_equal(str, MT_HEADER_2))
{
type = M_HEADER_2;
}
else if (caseless_equal(str, MT_HEADER_3))
{
type = M_HEADER_3;
}
else if (caseless_equal(str, MT_HEADER_4))
{
type = M_HEADER_4;
}
else if (caseless_equal(str, MT_HEADER_5))
{
type = M_HEADER_5;
}
else if (caseless_equal(str, MT_HEADER_6))
{
type = M_HEADER_6;
}
else if (caseless_equal(str, MT_ADDRESS))
{
type = M_ADDRESS;
}
else if (caseless_equal(str, MT_PLAIN_TEXT))
{
type = M_PLAIN_TEXT;
}
else if (caseless_equal(str, MT_LISTING_TEXT))
{
type = M_LISTING_TEXT;
}
else if (caseless_equal(str, MT_PLAIN_FILE))
{
type = M_PLAIN_FILE;
}
else if (caseless_equal(str, MT_PARAGRAPH))
{
type = M_PARAGRAPH;
}
else if (caseless_equal(str, MT_UNUM_LIST))
{
type = M_UNUM_LIST;
}
else if (caseless_equal(str, MT_NUM_LIST))
{
type = M_NUM_LIST;
}
else if (caseless_equal(str, MT_MENU))
{
type = M_MENU;
}
else if (caseless_equal(str, MT_DIRECTORY))
{
type = M_DIRECTORY;
}
else if (caseless_equal(str, MT_LIST_ITEM))
{
type = M_LIST_ITEM;
}
else if (caseless_equal(str, MT_DESC_LIST))
{
type = M_DESC_LIST;
}
else if (caseless_equal(str, MT_DESC_TITLE))
{
type = M_DESC_TITLE;
}
else if (caseless_equal(str, MT_DESC_TEXT))
{
type = M_DESC_TEXT;
}
else if (caseless_equal(str, MT_PREFORMAT))
{
type = M_PREFORMAT;
}
else if (caseless_equal(str, MT_BLOCKQUOTE))
{
type = M_BLOCKQUOTE;
}
else if (caseless_equal(str, MT_INDEX))
{
type = M_INDEX;
}
else if (caseless_equal(str, MT_HRULE))
{
type = M_HRULE;
}
else if (caseless_equal(str, MT_BASE))
{
type = M_BASE;
}
else if (caseless_equal(str, MT_LINEBREAK))
{
type = M_LINEBREAK;
}
else if (caseless_equal(str, MT_IMAGE))
{
type = M_IMAGE;
}
else if (caseless_equal(str, MT_FIGURE))
{
type = M_FIGURE;
}
else if (caseless_equal(str, MT_SELECT))
{
type = M_SELECT;
}
else if (caseless_equal(str, MT_OPTION))
{
type = M_OPTION;
}
else if (caseless_equal(str, MT_INPUT))
{
type = M_INPUT;
}
else if (caseless_equal(str, MT_TEXTAREA))
{
type = M_TEXTAREA;
}
else if (caseless_equal(str, MT_FORM))
{
type = M_FORM;
}
/*amb*/
else if (caseless_equal(str, MT_SUP))
{
type = M_SUP;
}
else if (caseless_equal(str, MT_SUB))
{
type = M_SUB;
}
else if (caseless_equal(str, MT_DOC_HEAD))
{
type = M_DOC_HEAD;
}
else if (caseless_equal(str, MT_UNDERLINED))
{
type = M_UNDERLINED;
}
else if (caseless_equal(str, MT_DOC_BODY))
{
type = M_DOC_BODY;
}
else if (caseless_equal(str, MT_TABLE))
{
if (tableSupportEnabled) {
type = M_TABLE;
}
else {
type = M_UNKNOWN;
}
}
else if (caseless_equal(str, MT_CAPTION))
{
type = M_CAPTION;
}
else if (caseless_equal(str, MT_TABLE_ROW))
{
if (tableSupportEnabled) {
type = M_TABLE_ROW;
}
else {
type = M_LINEBREAK;
}
}
else if (caseless_equal(str, MT_TABLE_HEADER))
{
if (tableSupportEnabled) {
type = M_TABLE_HEADER;
}
else {
type = M_UNKNOWN;
}
}
else if (caseless_equal(str, MT_TABLE_DATA))
{
if (tableSupportEnabled) {
type = M_TABLE_DATA;
}
else {
type = M_UNKNOWN;
}
}
else if (caseless_equal(str, MT_MAP))
{
type=M_MAP;
}
else if (caseless_equal(str, MT_CENTER))
{
type = M_CENTER;
}
else if (caseless_equal(str, MT_SCRIPT))
{
type = M_COMMENT;
}
else if (caseless_equal(str, MT_STYLE))
{
type = M_COMMENT;
}
else
{
#ifndef DISABLE_TRACE
if (htmlwTrace) {
fprintf(stderr, "warning: unknown mark (%s)\n", str);
}
#endif
type = M_UNKNOWN;
}
*tptr = tchar;
return(type);
}
/*
* Parse a single anchor tag. ptrp is a pointer to a pointer to the
* string to be parsed. On return, the ptr should be changed to
* point to after the text we have parsed.
* On return start and end should point to the beginning, and just
* after the end of the tag's name in the original anchor string.
* Finally the function returns the tag value in a malloced buffer.
*/
char *
AnchorTag(ptrp, startp, endp)
char **ptrp;
char **startp;
char **endp;
{
char *tag_val;
char *ptr;
char *start;
char tchar;
int quoted;
int has_value;
quoted = 0;
/*
* remove leading spaces, and set start
*/
ptr = *ptrp;
while (isspace((int)*ptr))
{
ptr++;
}
*startp = ptr;
/*
* Find and set the end of the tag
*/
while ((!isspace((int)*ptr))&&(*ptr != '=')&&(*ptr != '\0'))
{
ptr++;
}
*endp = ptr;
has_value=0;
if (*ptr == '\0')
{
*ptrp = ptr;
/* return(NULL);*/
/* try to handle <A NAME=blah></A> correctly -bjs*/
} else {
/*
* Move to the start of the tag value, if there is one.
*/
while ((isspace((int)*ptr))||(*ptr == '='))
{
if (*ptr == '=')
{
has_value = 1;
}
ptr++;
}
}
/*
* For a tag with no value, this is a boolean flag.
* Return the string "1" so we know the tag is there.
*/
if (!has_value)
{
*ptrp = *endp;
/*
* set a tag value of 1.
*/
tag_val = (char *)malloc(strlen("1") + 1);
if (tag_val == NULL)
{
#ifndef DISABLE_TRACE
if (htmlwTrace) {
fprintf(stderr, "can't malloc space for tag value\n");
}
#endif
return(NULL);
}
strcpy(tag_val, "1");
return(tag_val);
}
if (*ptr == '\"')
{
quoted = 1;
ptr++;
}
start = ptr;
/*
* Get tag value. Either a quoted string or a single word
*/
if (quoted)
{
while ((*ptr != '\"')&&(*ptr != '\0'))
{
ptr++;
}
}
else
{
while ((!isspace((int)*ptr))&&(*ptr != '\0'))
{
ptr++;
}
}
/* amb - everyone forgets the end quotes on anchor
attributes, so we'll let it slide */
/*
if ((quoted)&&(*ptr == '\0'))
{
*ptrp = ptr;
return(NULL);
}
*/
/*
* Copy the tag value out into a malloced string
*/
tchar = *ptr;
*ptr = '\0';
tag_val = (char *)malloc(strlen(start) + 1);
if (tag_val == NULL)
{
#ifndef DISABLE_TRACE
if (htmlwTrace) {
fprintf(stderr, "can't malloc space for tag value\n");
}
#endif
*ptr = tchar;
*ptrp = ptr;
return(NULL);
}
strcpy(tag_val, start);
*ptr = tchar;
/* If you forgot the end quote, you need to make sure you aren't
indexing ptr past the end of its own array -- SWP */
if (quoted && *ptr!='\0')
{
ptr++;
}
*ptrp = ptr;
return(tag_val);
}
/*
* Parse mark text for the value associated with the
* passed mark tag.
* If the passed tag is not found, return NULL.
* If the passed tag is found but has no value, return "".
*/
char* ParseMarkTag(text, mtext, mtag)
char *text;
char *mtext;
char *mtag;
{
char *ptr;
char *start;
char *end;
char *tag_val;
char tchar;
if ((text == NULL)||(mtext == NULL)||(mtag == NULL))
{
return(NULL);
}
ptr = (char *)(text + strlen(mtext));
while (*ptr != '\0')
{
tag_val = AnchorTag(&ptr, &start, &end);
tchar = *end;
*end = '\0';
if (caseless_equal(start, mtag))
{
*end = tchar;
if (tag_val == NULL)
{
tag_val = (char *)malloc(1);
*tag_val = '\0';
return(tag_val);
}
else
{
return(tag_val);
}
}
*end = tchar;
if (tag_val != NULL)
{
free(tag_val);
}
}
return(NULL);
}
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