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Speed up htmlCheckAutoClose

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This commit is contained in:
Nick Wellnhofer 2021-03-04 18:46:11 +01:00
parent b25acce858
commit 8095365b77

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@ -1072,102 +1072,266 @@ html40ElementTable[] = {
}
};
typedef struct {
const char *oldTag;
const char *newTag;
} htmlStartCloseEntry;
/*
* start tags that imply the end of current element
*/
static const char * const htmlStartClose[] = {
"form", "form", "p", "hr", "h1", "h2", "h3", "h4", "h5", "h6",
"dl", "ul", "ol", "menu", "dir", "address", "pre",
"listing", "xmp", "head", NULL,
"head", "p", NULL,
"title", "p", NULL,
"body", "head", "style", "link", "title", "p", NULL,
"frameset", "head", "style", "link", "title", "p", NULL,
"li", "p", "h1", "h2", "h3", "h4", "h5", "h6", "dl", "address",
"pre", "listing", "xmp", "head", "li", NULL,
"hr", "p", "head", NULL,
"h1", "p", "head", NULL,
"h2", "p", "head", NULL,
"h3", "p", "head", NULL,
"h4", "p", "head", NULL,
"h5", "p", "head", NULL,
"h6", "p", "head", NULL,
"dir", "p", "head", NULL,
"address", "p", "head", "ul", NULL,
"pre", "p", "head", "ul", NULL,
"listing", "p", "head", NULL,
"xmp", "p", "head", NULL,
"blockquote", "p", "head", NULL,
"dl", "p", "dt", "menu", "dir", "address", "pre", "listing",
"xmp", "head", NULL,
"dt", "p", "menu", "dir", "address", "pre", "listing", "xmp",
"head", "dd", NULL,
"dd", "p", "menu", "dir", "address", "pre", "listing", "xmp",
"head", "dt", NULL,
"ul", "p", "head", "ol", "menu", "dir", "address", "pre",
"listing", "xmp", NULL,
"ol", "p", "head", "ul", NULL,
"menu", "p", "head", "ul", NULL,
"p", "p", "head", "h1", "h2", "h3", "h4", "h5", "h6", FONTSTYLE, NULL,
"div", "p", "head", NULL,
"noscript", "script", NULL,
"center", "font", "b", "i", "p", "head", NULL,
"a", "a", "head", NULL,
"caption", "p", NULL,
"colgroup", "caption", "colgroup", "col", "p", NULL,
"col", "caption", "col", "p", NULL,
"table", "p", "head", "h1", "h2", "h3", "h4", "h5", "h6", "pre",
"listing", "xmp", "a", NULL,
"th", "th", "td", "p", "span", "font", "a", "b", "i", "u", NULL,
"td", "th", "td", "p", "span", "font", "a", "b", "i", "u", NULL,
"tr", "th", "td", "tr", "caption", "col", "colgroup", "p", NULL,
"thead", "caption", "col", "colgroup", NULL,
"tfoot", "th", "td", "tr", "caption", "col", "colgroup", "thead",
"tbody", "p", NULL,
"tbody", "th", "td", "tr", "caption", "col", "colgroup", "thead",
"tfoot", "tbody", "p", NULL,
"optgroup", "option", NULL,
"option", "option", NULL,
"fieldset", "legend", "p", "head", "h1", "h2", "h3", "h4", "h5", "h6",
"pre", "listing", "xmp", "a", NULL,
/* most tags in in FONTSTYLE, PHRASE and SPECIAL should close <head> */
"tt", "head", NULL,
"i", "head", NULL,
"b", "head", NULL,
"u", "head", NULL,
"s", "head", NULL,
"strike", "head", NULL,
"big", "head", NULL,
"small", "head", NULL,
"em", "head", NULL,
"strong", "head", NULL,
"dfn", "head", NULL,
"code", "head", NULL,
"samp", "head", NULL,
"kbd", "head", NULL,
"var", "head", NULL,
"cite", "head", NULL,
"abbr", "head", NULL,
"acronym", "head", NULL,
/* "a" */
"img", "head", NULL,
/* "applet" */
/* "embed" */
/* "object" */
"font", "head", NULL,
/* "basefont" */
"br", "head", NULL,
/* "script" */
"map", "head", NULL,
"q", "head", NULL,
"sub", "head", NULL,
"sup", "head", NULL,
"span", "head", NULL,
"bdo", "head", NULL,
"iframe", "head", NULL,
NULL
static const htmlStartCloseEntry htmlStartClose[] = {
{ "a", "a" },
{ "a", "fieldset" },
{ "a", "table" },
{ "a", "td" },
{ "a", "th" },
{ "address", "dd" },
{ "address", "dl" },
{ "address", "dt" },
{ "address", "form" },
{ "address", "li" },
{ "address", "ul" },
{ "b", "center" },
{ "b", "p" },
{ "b", "td" },
{ "b", "th" },
{ "big", "p" },
{ "caption", "col" },
{ "caption", "colgroup" },
{ "caption", "tbody" },
{ "caption", "tfoot" },
{ "caption", "thead" },
{ "caption", "tr" },
{ "col", "col" },
{ "col", "colgroup" },
{ "col", "tbody" },
{ "col", "tfoot" },
{ "col", "thead" },
{ "col", "tr" },
{ "colgroup", "colgroup" },
{ "colgroup", "tbody" },
{ "colgroup", "tfoot" },
{ "colgroup", "thead" },
{ "colgroup", "tr" },
{ "dd", "dt" },
{ "dir", "dd" },
{ "dir", "dl" },
{ "dir", "dt" },
{ "dir", "form" },
{ "dir", "ul" },
{ "dl", "form" },
{ "dl", "li" },
{ "dt", "dd" },
{ "dt", "dl" },
{ "font", "center" },
{ "font", "td" },
{ "font", "th" },
{ "form", "form" },
{ "h1", "fieldset" },
{ "h1", "form" },
{ "h1", "li" },
{ "h1", "p" },
{ "h1", "table" },
{ "h2", "fieldset" },
{ "h2", "form" },
{ "h2", "li" },
{ "h2", "p" },
{ "h2", "table" },
{ "h3", "fieldset" },
{ "h3", "form" },
{ "h3", "li" },
{ "h3", "p" },
{ "h3", "table" },
{ "h4", "fieldset" },
{ "h4", "form" },
{ "h4", "li" },
{ "h4", "p" },
{ "h4", "table" },
{ "h5", "fieldset" },
{ "h5", "form" },
{ "h5", "li" },
{ "h5", "p" },
{ "h5", "table" },
{ "h6", "fieldset" },
{ "h6", "form" },
{ "h6", "li" },
{ "h6", "p" },
{ "h6", "table" },
{ "head", "a" },
{ "head", "abbr" },
{ "head", "acronym" },
{ "head", "address" },
{ "head", "b" },
{ "head", "bdo" },
{ "head", "big" },
{ "head", "blockquote" },
{ "head", "body" },
{ "head", "br" },
{ "head", "center" },
{ "head", "cite" },
{ "head", "code" },
{ "head", "dd" },
{ "head", "dfn" },
{ "head", "dir" },
{ "head", "div" },
{ "head", "dl" },
{ "head", "dt" },
{ "head", "em" },
{ "head", "fieldset" },
{ "head", "font" },
{ "head", "form" },
{ "head", "frameset" },
{ "head", "h1" },
{ "head", "h2" },
{ "head", "h3" },
{ "head", "h4" },
{ "head", "h5" },
{ "head", "h6" },
{ "head", "hr" },
{ "head", "i" },
{ "head", "iframe" },
{ "head", "img" },
{ "head", "kbd" },
{ "head", "li" },
{ "head", "listing" },
{ "head", "map" },
{ "head", "menu" },
{ "head", "ol" },
{ "head", "p" },
{ "head", "pre" },
{ "head", "q" },
{ "head", "s" },
{ "head", "samp" },
{ "head", "small" },
{ "head", "span" },
{ "head", "strike" },
{ "head", "strong" },
{ "head", "sub" },
{ "head", "sup" },
{ "head", "table" },
{ "head", "tt" },
{ "head", "u" },
{ "head", "ul" },
{ "head", "var" },
{ "head", "xmp" },
{ "hr", "form" },
{ "i", "center" },
{ "i", "p" },
{ "i", "td" },
{ "i", "th" },
{ "legend", "fieldset" },
{ "li", "li" },
{ "link", "body" },
{ "link", "frameset" },
{ "listing", "dd" },
{ "listing", "dl" },
{ "listing", "dt" },
{ "listing", "fieldset" },
{ "listing", "form" },
{ "listing", "li" },
{ "listing", "table" },
{ "listing", "ul" },
{ "menu", "dd" },
{ "menu", "dl" },
{ "menu", "dt" },
{ "menu", "form" },
{ "menu", "ul" },
{ "ol", "form" },
{ "ol", "ul" },
{ "option", "optgroup" },
{ "option", "option" },
{ "p", "address" },
{ "p", "blockquote" },
{ "p", "body" },
{ "p", "caption" },
{ "p", "center" },
{ "p", "col" },
{ "p", "colgroup" },
{ "p", "dd" },
{ "p", "dir" },
{ "p", "div" },
{ "p", "dl" },
{ "p", "dt" },
{ "p", "fieldset" },
{ "p", "form" },
{ "p", "frameset" },
{ "p", "h1" },
{ "p", "h2" },
{ "p", "h3" },
{ "p", "h4" },
{ "p", "h5" },
{ "p", "h6" },
{ "p", "head" },
{ "p", "hr" },
{ "p", "li" },
{ "p", "listing" },
{ "p", "menu" },
{ "p", "ol" },
{ "p", "p" },
{ "p", "pre" },
{ "p", "table" },
{ "p", "tbody" },
{ "p", "td" },
{ "p", "tfoot" },
{ "p", "th" },
{ "p", "title" },
{ "p", "tr" },
{ "p", "ul" },
{ "p", "xmp" },
{ "pre", "dd" },
{ "pre", "dl" },
{ "pre", "dt" },
{ "pre", "fieldset" },
{ "pre", "form" },
{ "pre", "li" },
{ "pre", "table" },
{ "pre", "ul" },
{ "s", "p" },
{ "script", "noscript" },
{ "small", "p" },
{ "span", "td" },
{ "span", "th" },
{ "strike", "p" },
{ "style", "body" },
{ "style", "frameset" },
{ "tbody", "tbody" },
{ "tbody", "tfoot" },
{ "td", "tbody" },
{ "td", "td" },
{ "td", "tfoot" },
{ "td", "th" },
{ "td", "tr" },
{ "tfoot", "tbody" },
{ "th", "tbody" },
{ "th", "td" },
{ "th", "tfoot" },
{ "th", "th" },
{ "th", "tr" },
{ "thead", "tbody" },
{ "thead", "tfoot" },
{ "title", "body" },
{ "title", "frameset" },
{ "tr", "tbody" },
{ "tr", "tfoot" },
{ "tr", "tr" },
{ "tt", "p" },
{ "u", "p" },
{ "u", "td" },
{ "u", "th" },
{ "ul", "address" },
{ "ul", "form" },
{ "ul", "menu" },
{ "ul", "ol" },
{ "ul", "pre" },
{ "xmp", "dd" },
{ "xmp", "dl" },
{ "xmp", "dt" },
{ "xmp", "fieldset" },
{ "xmp", "form" },
{ "xmp", "li" },
{ "xmp", "table" },
{ "xmp", "ul" }
};
/*
@ -1237,9 +1401,6 @@ static const elementPriority htmlEndPriority[] = {
{NULL, 100} /* Default priority */
};
static const char** htmlStartCloseIndex[100];
static int htmlStartCloseIndexinitialized = 0;
/************************************************************************
* *
* functions to handle HTML specific data *
@ -1249,24 +1410,10 @@ static int htmlStartCloseIndexinitialized = 0;
/**
* htmlInitAutoClose:
*
* Initialize the htmlStartCloseIndex for fast lookup of closing tags names.
* This is not reentrant. Call xmlInitParser() once before processing in
* case of use in multithreaded programs.
* This is a no-op now.
*/
void
htmlInitAutoClose(void) {
int indx, i = 0;
if (htmlStartCloseIndexinitialized) return;
for (indx = 0;indx < 100;indx ++) htmlStartCloseIndex[indx] = NULL;
indx = 0;
while ((htmlStartClose[i] != NULL) && (indx < 100 - 1)) {
htmlStartCloseIndex[indx++] = (const char**) &htmlStartClose[i];
while (htmlStartClose[i] != NULL) i++;
i++;
}
htmlStartCloseIndexinitialized = 1;
}
static int
@ -1313,6 +1460,19 @@ htmlGetEndPriority (const xmlChar *name) {
}
static int
htmlCompareStartClose(const void *vkey, const void *member) {
const htmlStartCloseEntry *key = (const htmlStartCloseEntry *) vkey;
const htmlStartCloseEntry *entry = (const htmlStartCloseEntry *) member;
int ret;
ret = strcmp(key->oldTag, entry->oldTag);
if (ret == 0)
ret = strcmp(key->newTag, entry->newTag);
return(ret);
}
/**
* htmlCheckAutoClose:
* @newtag: The new tag name
@ -1320,37 +1480,21 @@ htmlGetEndPriority (const xmlChar *name) {
*
* Checks whether the new tag is one of the registered valid tags for
* closing old.
* Initialize the htmlStartCloseIndex for fast lookup of closing tags names.
*
* Returns 0 if no, 1 if yes.
*/
static int
htmlCheckAutoClose(const xmlChar * newtag, const xmlChar * oldtag)
{
int i, indx;
const char **closed = NULL;
htmlStartCloseEntry key;
void *res;
if (htmlStartCloseIndexinitialized == 0)
htmlInitAutoClose();
/* inefficient, but not a big deal */
for (indx = 0; indx < 100; indx++) {
closed = htmlStartCloseIndex[indx];
if (closed == NULL)
return (0);
if (xmlStrEqual(BAD_CAST * closed, newtag))
break;
}
i = closed - htmlStartClose;
i++;
while (htmlStartClose[i] != NULL) {
if (xmlStrEqual(BAD_CAST htmlStartClose[i], oldtag)) {
return (1);
}
i++;
}
return (0);
key.oldTag = (const char *) oldtag;
key.newTag = (const char *) newtag;
res = bsearch(&key, htmlStartClose,
sizeof(htmlStartClose) / sizeof(htmlStartCloseEntry),
sizeof(htmlStartCloseEntry), htmlCompareStartClose);
return(res != NULL);
}
/**