GopherProxy

	Handle nested parens in links - smu - smu - simple markup (Markdown) processor …
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	---
	commit c21412ce4899c134ea315cbdde0ab1f056de1463
	parent 67be1bfcb8643531ce7063423a7e45a2225439b8
	Author: Karl Bartel <[email protected]>
	Date: Sat, 28 Sep 2019 23:27:18 +0200

	Handle nested parens in links

	Example input:

	[With parens in the URL](http://en.wikipedia.org/wiki/WIMP_(computing))

	Diffstat:
	M smu.c \| 21 ++++++++++++++++-----

	1 file changed, 16 insertions(+), 5 deletions(-)
	---
	diff --git a/smu.c b/smu.c
	@@ -233,7 +233,7 @@ dolineprefix(const char begin, const char end, int newblo…

	int
	dolink(const char begin, const char end, int newblock) {
	- int img, len, sep;
	+ int img, len, sep, parens_depth = 1;
	const char desc, link, p, q, descend, linkend;
	const char title = NULL, titleend = NULL;

	@@ -251,8 +251,20 @@ dolink(const char begin, const char end, int newblock) {
	return 0;
	descend = p;
	link = p + 2;
	- if(!(q = strchr(link, ')')) \|\| q > end)
	- return 0;
	+
	+ /* find end of link while handling nested parens */
	+ q = link;
	+ while(parens_depth) {
	+ if(!(q = strpbrk(q, "()")) \|\| q > end)
	+ return 0;
	+ if(*q == '(')
	+ parens_depth++;
	+ else
	+ parens_depth--;
	+ if(parens_depth && q < end)
	+ q++;
	+ }
	+
	if((p = strpbrk(link, "\"'")) && p < end && q > p) {
	sep = p[0]; /* separator: can be " or ' */
	title = p + 1;
	@@ -261,12 +273,11 @@ dolink(const char begin, const char end, int newblock) {
	if(!(p = strchr(title, sep)) \|\| q > end \|\| p > q)
	return 0;
	titleend = p;
	- len = p + 2 - begin;
	}
	else {
	linkend = q;
	- len = q + 1 - begin;
	}
	+ len = q + 1 - begin;
	if(img) {
	fputs("<img src=\"", stdout);
	hprint(link, linkend);