Subject: RE: Checking to see if field has data in it before passing it routine
From: "Jonathan King" <[EMAIL PROTECTED]>
Date: Sat, 23 Jul 2005 18:41:31 -0400
X-Message-Number: 11
Here is a simple way to do what you are doing.
static void GetFieldData( UInt16 fld, Char *text ) {
FormPtr frm = FrmGetActiveForm();
FieldPtr fldP = FrmGetObjectPtr(frm, FrmGetObjectIndex(frm,fld));
if(FldGetTextLegnth(fldP)) {
StrCopy(text, FldGetTextPtr(fldP);
}
}
Here's a better way that has error checking, default processing and takes
advantage of a unique feature of the PalmOS "StrNCat()" function to prevent
stack corruption:
Boolean GetFieldData (UInt16 fldNbr, Char *text, UInt16 maxLen) {
FormPtr pForm = FrmGetActiveForm ();
FieldPtr pField = FrmGetObjectPtr (pForm, FrmGetObjectIndex
(pForm, fldNbr));
if (text != NULL) *text = '\0'; // initialize
if (text == NULL || pField == NULL) return false; // I like error
checking !!
if (FldGetTextLength (pField))
StrNCat (text, FldGetTextPtr (pField), maxLen);
return true;
}
Roger Stringer
Marietta Systems, Inc. (www.rf-tp.com)
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