PDL_GetParamDouble
Description
Extracts a named double
parameter passed to a service callback function. You can register a callback function with a service using the PDL_ServiceCallWithCallback API. All parameters are passed as strings, though their underlying types (double, int, or string) can be different.
This API returns 0.0
if the parameter is not found. You can use the PDL_ParamExists API to check if the parameter exists before calling this API.
See Accessing Services for more information and examples.
Syntax
double PDL_GetParamDouble(PDL_ServiceParameters *params, const char *name);
Argument | Description |
---|---|
params | Parameters from which to extract data. This is passed to the callback function from the service and you simply pass it on here without modification. |
name | Name of the argument to extract. |
Returns
passed parameter, or `0.0` if the parameter does not exist.
See also:
- PDL_ServiceCall
- PDL_ServiceCallWithCallback
- PDL_UnregisterServiceCallback
- PDL_GetParamInt
- PDL_GetParamString
- PDL_ParamExists