This still doesn't seem right.
If I have "#{?foo,bar,#{baz}} #{zoink}".
Then in format_expand it'll decide the first { is: "?foo,bar,#{baz}}
#{zoink".
Then if foo is true I'll get bar (which is fine)
But if it's false I'll get "#{baz}} #{zoink" which is wrong.
You need to replace the strchr with a loop like:
depth = 1;
ptr = fmt;
while (*ptr != '\0') {
if (*ptr == '{')
depth++;
if (*ptr == '}') {
if (--depth == 0)
break;
}
}
Which means format_replace will be passed exactly "?foo,bar,#{baz}".
On Sun, Apr 28, 2013 at 01:54:44PM +0100, Thomas Adam wrote:
> Hi,
>
> On Thu, Apr 25, 2013 at 10:55:56PM +0100, Nicholas Marriott wrote:
> > Ok. I think you have the right idea about recursing through
> > format_expand you are just going to need to pull out the affected format
> > differently (ditch strchr and use a custom loop which counts {s and }s).
>
> Yeah, that's one way. But actually, strchr/strchrr would both be doing the
> same thing as this manual loop you refer to, it's just that their use would
> vary depending on whether we're expanding a terniary-form of a format
> replacement or just a single element.
>
> So I think something along the lines of the patch attached might be an idea.
> It's certainly the path of least resistance (i.e., not much code changed)
> but that doesn't mean I particularly like it. ;P
>
> -- Thomas Adam
> diff --git a/format.c b/format.c
> index 7de819a..178f201 100644
> --- a/format.c
> +++ b/format.c
> @@ -150,8 +150,8 @@ int
> format_replace(struct format_tree *ft,
> const char *key, size_t keylen, char **buf, size_t *len, size_t *off)
> {
> - char *copy, *ptr;
> const char *value;
> + char *copy, *ptr;
> size_t valuelen;
>
> /* Make a copy of the key. */
> @@ -182,6 +182,7 @@ format_replace(struct format_tree *ft,
> goto fail;
> value = ptr + 1;
> }
> + value = format_expand(ft, value);
> } else {
> value = format_find(ft, copy);
> if (value == NULL)
> @@ -232,7 +233,11 @@ format_expand(struct format_tree *ft, const char *fmt)
> ch = (u_char) *fmt++;
> switch (ch) {
> case '{':
> - ptr = strchr(fmt, '}');
> + if (*fmt++ == '?')
> + ptr = strrchr(--fmt, '}');
> + else
> + ptr = strchr(--fmt, '}');
There is no need to do fmt++ if you then do --fmt in both branches of
the if.
> +
> if (ptr == NULL)
> break;
> n = ptr - fmt;
> --
> 1.7.11.4
>
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