Subject: Re: [PATCH v3 09/10] abspath: convert absolute_path() to strbuf

From: René Scharfe <[email-masked]>
Date: Tue, 29 Jul 2014 00:34:41 +0200

Am 28.07.2014 um 21:15 schrieb Jeff King:
> On Mon, Jul 28, 2014 at 08:33:55PM +0200, René Scharfe wrote:
>
>>   const char *absolute_path(const char *path)
>>   {
>> -	static char buf[PATH_MAX + 1];
>> -
>> -	if (!*path) {
>> -		die("The empty string is not a valid path");
>> -	} else if (is_absolute_path(path)) {
>> -		if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
>> -			die("Too long path: %.*s", 60, path);
>> -	} else {
>> -		size_t len;
>> -		const char *fmt;
>> -		const char *cwd = get_pwd_cwd();
>> -		if (!cwd)
>> -			die_errno("Cannot determine the current working directory");
>> -		len = strlen(cwd);
>> -		fmt = (len > 0 && is_dir_sep(cwd[len - 1])) ? "%s%s" : "%s/%s";
>> -		if (snprintf(buf, PATH_MAX, fmt, cwd, path) >= PATH_MAX)
>> -			die("Too long path: %.*s", 60, path);
>> -	}
>> -	return buf;
>> +	static struct strbuf sb;
>> +	strbuf_init(&sb, 0);
>> +	strbuf_add_absolute_path(&sb, path);
>> +	return sb.buf;
>>   }
>
> Is it right to strbuf_init here? That means that we are throwing away
> the old buffer for each call. I would think you want instead:
>
>    static struct strbuf sb = STRBUF_INIT;
>    strbuf_reset(&sb);
>    ...

I changed it from _reset to _init, but I can't remember why. :(  Perhaps 
it's the summer heat.  Your version makes more sense to me now.

René