Hello!
Geoff Hutchison wrote:
>
> At 11:10 AM -0600 12/8/99, Gilles Detillieux wrote:
> >The ExternalParser::readLine() method has the advantage that it makes
> >sure you don't end up with a truncated line, if an input line is bigger
> >than your buffer. So, maybe it's not such a bad example after all.
>
> That was, actually my point. I didn't think of the cin.getline()
> methods because, ... well, because I didn't think of them. :-)
>
> Anyway, I would think that the readLine() method might not be a bad
> base for the String >> operator.
Will this couple of functions (attached) go?
Alexis
int
String::readLine(FILE *in)
{
Length = 0;
allocate_fix_space(2048);
while (fgets(Data + Length, Allocated - Length, in))
{
Length += strlen(Data + Length);
if (Length == 0)
continue;
if (Data[Length - 1] == '\n')
{
//
// A full line has been read. Return it.
//
chop('\n');
return 1;
}
if (Allocated > Length + 1)
{
//
// Not all available space filled. Probably EOF?
//
continue;
}
//
// Only a partial line was read. Increase available space in
// string and read some more.
//
reallocate_space(Allocated << 1);
}
chop('\n');
return Length > 0;
}
istream &
operator >> (istream &in, String &line)
{
line.Length = 0;
line.allocate_fix_space(2048);
while (in.get(line.Data + line.Length, line.Allocated - line.Length))
{
line.Length += strlen(line.Data + line.Length);
int c = in.get();
if (c == '\n')
{
//
// A full line has been read. Return it.
//
break;
}
if (line.Allocated > line.Length + 2)
{
//
// Not all available space filled. Probably EOF?
//
line.Data[line.Length++] = char(c);
continue;
}
//
// Only a partial line was read. Increase available space in
// string and read some more.
//
line.reallocate_space(line.Allocated << 1);
line.Data[line.Length++] = char(c);
}
return in;
}
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