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Fix handling of URLs ending in a ⟩

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I've known about this issue before, but didn't realize it was so
widespread. This fixes many links.
This commit is contained in:
Yorhel 2016-10-16 09:11:13 +02:00
parent 7d31f41ba8
commit 17fc298217
2 changed files with 15 additions and 3 deletions
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17
lib/ManUtils/ManUtils.xs
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@ -169,9 +169,8 @@ static void flushline(ctx_t *x) {
// HTTP(s) URL.
// This is just a simple q{https?://[^ ][.,;"\)>]?( |$)} match, doesn't
// always work right:
// - troff.1: ⟨http://www.gnu.org/copyleft/fdl.html⟩. <- yes, that's an Unicode character.
// - roff.7: Has quite a few issues with wrapped URLs and situations similar to the above.
// always work right, e.g.:
// - https://manned.org/spu_run/414316a1 -> URL wrapped to new line
// Note: Don't use strncmp() before manually checking for 'http'. The parse
// time is otherwise increased by a factor 2.
if(s[0] == 'h' && s[1] == 't' && s[2] == 't' && s[3] == 'p' && (strncmp(s, "http://", 7) == 0 || strncmp(s, "https://", 8) == 0)) {
@ -189,6 +188,18 @@ static void flushline(ctx_t *x) {
endchr = *sp;
*(sp--) = 0;
}
// Also catch a Unicode '⟩', which is how groff sometimes ends a .UR, e.g.:
// - https://manned.org/troff/c4467840
// - https://manned.org/pass/78413b49
// - https://manned.org/empathy-accounts/8c05b2c1
// - https://manned.org/urn/8cb83e85
// - https://manned.org/wine/4a699a22
if(*sp == '\xa9' && *(sp-1) == '\x9f' && *(sp-2) == '\xe2') {
sp[1] = endchr;
sp -= 3;
endchr = sp[1];
sp[1] = 0;
}
sv_catpvf(x->dest, "<a href=\"%s\" rel=\"nofollow\">%s</a>", s, s);
*(++sp) = endchr;
es = s = sp;