XML tag parse improvements for PI and end tags - grabtitle - stupid HTML title grabber
(HTM) git clone git://git.codemadness.org/grabtitle
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---
(DIR) commit 3054084945aae1ceb22b87c9132dea71cf9e5108
(DIR) parent d908478d0f84bc275428fd71e934c993bb29211c
(HTM) Author: Hiltjo Posthuma <hiltjo@codemadness.org>
Date: Mon, 10 Dec 2018 19:03:02 +0100
XML tag parse improvements for PI and end tags
- Stricter parsing of tags, no whitespace stripping after <.
- For end tags the "internal" context x->tag would be "/sometag". Make sure
this matches exactly with the parameter tag.
- Reset tagname after parsing an end tag.
- Make end tag handling more consistent.
- Remove temporary variable taglen.
Diffstat:
M xml.c | 52 +++++++++++++++++--------------
1 file changed, 29 insertions(+), 23 deletions(-)
---
(DIR) diff --git a/xml.c b/xml.c
@@ -334,8 +334,8 @@ xml_entitytostr(const char *e, char *buf, size_t bufsiz)
void
xml_parse(XMLParser *x)
{
- int c, ispi;
- size_t datalen, tagdatalen, taglen;
+ size_t datalen, tagdatalen;
+ int c, isend;
if (!x->getnext)
return;
@@ -367,30 +367,32 @@ xml_parse(XMLParser *x)
}
}
} else {
- x->tag[0] = '\0';
- x->taglen = 0;
-
/* normal tag (open, short open, close), processing instruction. */
- if (isspace(c))
- while ((c = x->getnext()) != EOF && isspace(c))
- ;
- if (c == EOF)
- return;
x->tag[0] = c;
- ispi = (c == '?') ? 1 : 0;
- x->isshorttag = ispi;
- taglen = 1;
+ x->taglen = 1;
+ x->isshorttag = isend = 0;
+
+ /* treat processing instruction as shorttag, don't strip "?" prefix. */
+ if (c == '?') {
+ x->isshorttag = 1;
+ } else if (c == '/') {
+ if ((c = x->getnext()) == EOF)
+ return;
+ x->tag[0] = c;
+ isend = 1;
+ }
+
while ((c = x->getnext()) != EOF) {
if (c == '/')
x->isshorttag = 1; /* short tag */
else if (c == '>' || isspace(c)) {
- x->tag[taglen] = '\0';
- if (x->tag[0] == '/') { /* end tag, starts with </ */
- x->taglen = --taglen; /* len -1 because of / */
- if (taglen && x->xmltagend)
- x->xmltagend(x, &(x->tag)[1], x->taglen, 0);
+ x->tag[x->taglen] = '\0';
+ if (isend) { /* end tag, starts with </ */
+ if (x->xmltagend)
+ x->xmltagend(x, x->tag, x->taglen, x->isshorttag);
+ x->tag[0] = '\0';
+ x->taglen = 0;
} else {
- x->taglen = taglen;
/* start tag */
if (x->xmltagstart)
x->xmltagstart(x, x->tag, x->taglen);
@@ -400,11 +402,15 @@ xml_parse(XMLParser *x)
x->xmltagstartparsed(x, x->tag, x->taglen, x->isshorttag);
}
/* call tagend for shortform or processing instruction */
- if ((x->isshorttag || ispi) && x->xmltagend)
- x->xmltagend(x, x->tag, x->taglen, 1);
+ if (x->isshorttag) {
+ if (x->xmltagend)
+ x->xmltagend(x, x->tag, x->taglen, x->isshorttag);
+ x->tag[0] = '\0';
+ x->taglen = 0;
+ }
break;
- } else if (taglen < sizeof(x->tag) - 1)
- x->tag[taglen++] = c; /* NOTE: tag name truncation */
+ } else if (x->taglen < sizeof(x->tag) - 1)
+ x->tag[x->taglen++] = c; /* NOTE: tag name truncation */
}
}
} else {