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Handle nested parens in links

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Example input:

[With parens in the URL](http://en.wikipedia.org/wiki/WIMP_(computing))
This commit is contained in:
Karl Bartel 2019-09-28 23:27:18 +02:00 • committed by Enno Boland
parent 67be1bfcb8
commit c21412ce48
1 changed files with 16 additions and 5 deletions
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21
smu.c
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@ -233,7 +233,7 @@ dolineprefix(const char *begin, const char *end, int newblock) {
int int
dolink(const char *begin, const char *end, int newblock) { 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 *desc, *link, *p, *q, *descend, *linkend;
const char *title = NULL, *titleend = NULL; const char *title = NULL, *titleend = NULL;
@ -251,8 +251,20 @@ dolink(const char *begin, const char *end, int newblock) {
return 0; return 0;
descend = p; descend = p;
link = p + 2; 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) { if((p = strpbrk(link, "\"'")) && p < end && q > p) {
sep = p[0]; /* separator: can be " or ' */ sep = p[0]; /* separator: can be " or ' */
title = p + 1; 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) if(!(p = strchr(title, sep)) || q > end || p > q)
return 0; return 0;
titleend = p; titleend = p;
len = p + 2 - begin;
} }
else { else {
linkend = q; linkend = q;
len = q + 1 - begin;
} }
len = q + 1 - begin;
if(img) { if(img) {
fputs("<img src=\"", stdout); fputs("<img src=\"", stdout);
hprint(link, linkend); hprint(link, linkend);