Re: [PATCH v2] Let mailsplit and mailinfo handle mails with CRLF line-endings

[Alex Riesen <raa.lkml@gmail.com>]

On Tue, Aug 4, 2009 at 23:29, Brandon
Casey<brandon.casey.ctr@nrlssc.navy.mil> wrote:
> Alex Riesen wrote:
>> +     if (c == '\n' && len > 1 && buf[len - 2] == '\r')
>> +             buf[--len - 1] = '\n';
>>       buf[len] = '\0';
>>
>>       return len;
>
> What if \r lands at character 99 and \n is at character 100?  If buf has
> exactly 100 characters available for writing. ...

Ah, yes. You're right.

I have strong dislike towards unget, though. How about this, instead:

int read_line_with_nul(char *buf, int size, FILE *in)
{
	int len = 0, c;

	while (len < size) {
		c = getc(in);
		if (c == EOF)
			break;
		buf[len++] = c;
		if (c == '\n')
			break;
		else if (len == size)
			c = 0;
	}
	if (c == '\n' && len > 1 && buf[len - 2] == '\r')
		buf[--len - 1] = '\n';
	buf[len] = '\0';

	return len;
}