xcall NUMCHK, string {,len, rc}

NUMCHK.SBR checks a string to see if it contains valid numeric characters only, and possibly that it is of a certain length.

Parameters

string  (String)  [in/out]

string to be searched. string is stripped of leading and trailing spaces and tabs and returned that way, regardless of whether valid.

len  (Num)  [in]

if specified, stripped string length must match.

rc  (F,6)  [out]

optional return value specifying okay (0), or that string contains invalid characters or is not of len length (-1). Note that NUMCHK may be passed to the XFUNC function, in which case rc is not really relevant since the function itself returns the same value.

History

2006 August, A-Shell 4.9.963:  Add rountine to A-Shell.