Damn, this list is active. *shudder* Seems to really calm down on the
weekends, though. You've probably already got working code, but here's my
way of looking at it.
Anyway... when I need to do things like this (and you know the length of the
string, that's kinda why the nulls are there btw) I use pointers. Lots of
them. (Also, I typed up about four different ways of copying strings and
adding terminating NULLS, from streight copying, to using MemPtrResize, and
how to do it with a buffer. If you want any of those methods posted, just
ask. They were a bit long in total, so I removed them from this post.)
{Removed Lots-O-Code}
There are a bunch of ways to do this. In your case, I'd use a running
pointer. Also, calling system functions really increases the size of your
code, as well as slows things down. I've tested previousally, and my own
StrCopy routine was quite a bit faster. The following code should work for
an unlimited number of string fields: (from the look of your code, each field
-is- null terminated)
Char *p, *q;
Char *packed;
Char *field[NUM_FIELDS]; // NUM_FIELDS is a define somewhere...
UInt32 packed_size = 0;
UInt16 i; // current field (had to be short)
// First pass, used to allocate the packed string.
for ( i = 0, i < NUM_FIELDS; i++ )
packed_size += StrLen(field[i]) + 1;
// Allocate the packed string... check for error?
packed = (Char *)MemPtrNew(sizeof(Char) * packed_size);
p = packed; // packed running pointer
for ( i = 0, i < NUM_FIELDS; i++ ) {
q = field[i]; // field running pointer
while ( &q != 0 ) {
&p++ = &q++; // copy the string
} &p++ = 0; // add the NULL
}
At the end of the above, 'packed' should contain the packed string, including
final terminating null. Am I making any glaring mistakes in the above? If
so, tell me. I might want to use the above in any database code I make in
the future. (Currently, my databases are limited to structured numbers, so I
can't really pack anything. I really dislike the way databases are handled
in PalmOS...)
My few dollars,
Matthew Bevan
--
Matthew (Darkstorm) Bevan [EMAIL PROTECTED]
Margin Software, NECTI. http://www.marginsoftware.com
Re-inventing the wheel, every time.
- This life is a test. It is only a test. Had this been an actual life,
you would have received further instructions as to what to do and where
to go.
--
For information on using the Palm Developer Forums, or to unsubscribe, please see
http://www.palmos.com/dev/support/forums/
