Difference between revisions of "Is Numeric"
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The following are the RPG/LE fully free-form definitions and instructions needed for using the {{AN}} service procedure. This service procedure simply allows the caller to validate that a character string is all numeric digits, decimal, and/or sign characters—or not. | The following are the RPG/LE fully free-form definitions and instructions needed for using the {{AN}} service procedure. This service procedure simply allows the caller to validate that a character string is all numeric digits, decimal, and/or sign characters—or not. | ||
{| class="wikitable" | {| class="wikitable" | ||
| − | |+Rule of Thumb | + | |+ style="padding-left:6px;text-align:left;"|Rule of Thumb |
|- | |- | ||
|Sometimes, having a service procedure is simply a means of making code more self-documenting (i.e., easier for others to understand). | |Sometimes, having a service procedure is simply a means of making code more self-documenting (i.e., easier for others to understand). | ||
|} | |} | ||
| + | |||
| + | By [[User:DaveLClarkI|Dave Clark]] | ||
== Service Prototype == | == Service Prototype == | ||
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<pre> | <pre> | ||
**free | **free | ||
| + | ctl-opt NoMain AlwNull(*UsrCtl) Debug Option(*SrcStmt:*NoDebugIo) | ||
| + | DatFmt(*ISO) TimFmt(*ISO); | ||
//============================================================================== | //============================================================================== | ||
Latest revision as of 16:35, 17 December 2018
Summary
The following are the RPG/LE fully free-form definitions and instructions needed for using the Is Numeric service procedure. This service procedure simply allows the caller to validate that a character string is all numeric digits, decimal, and/or sign characters—or not.
| Sometimes, having a service procedure is simply a means of making code more self-documenting (i.e., easier for others to understand). |
By Dave Clark
Service Prototype
Place the following in a separate copybook for inclusion in both the caller and the service program source members.
**free //============================================================================== // Validates variable-length character string for numerics only. // Returns a Boolean true/false value as a result. //============================================================================== dcl-pr GenUtl_isNumeric ind; pString varchar(50) const; end-pr;
Service Procedure
Place the following in a service program source member.
**free
ctl-opt NoMain AlwNull(*UsrCtl) Debug Option(*SrcStmt:*NoDebugIo)
DatFmt(*ISO) TimFmt(*ISO);
//==============================================================================
// Validates variable-length character string for numerics only.
// Returns a Boolean true/false value as a result.
//==============================================================================
dcl-proc GenUtl_isNumeric export;
dcl-pi *n ind;
pString varchar(50) const;
end-pi;
dcl-c GenUtl_Numeric '0123456789.+-';
if %len(pString) = *zero; // if no supplied value
return *off; // indicate not numeric
endif;
return (%check(GenUtl_Numeric: pString) = *zero); // return result of check
end-proc;
