Ivi_GetViReal64EntryFromCoercedVal
Usage
ViStatus Ivi_GetViReal64EntryFromCoercedVal(ViReal64 coercedValue, IviRangeTablePtr rangeTable, ViReal64* discreteOrMinValue, ViReal64* maxValue, ViInt32* tableIndex, ViString* commandString, ViInt32* commandValue);
Purpose
This function finds the first range table entry for which the coercedValue field is equal to the coerced value you specify. If the function finds an entry, it returns the contents of the entry. If it does not find an entry, it returns an IVI_ERROR_INVALID_VALUE error.
The function performs all ViReal64 comparisons using a comparison precision of 14 decimal digits.
The function returns the discreteOrMinValue and maxValue fields as ViReal64 values.
Parameters
| Name | Type | Description |
|---|---|---|
| coercedValue | ViReal64 |
Specify the coerced value that you want to find in the range table. |
| rangeTable | IviRangeTablePtr |
Specify the address of the range table in which to search for the coerced value. |
| discreteOrMinValue | ViReal64* |
If the search succeeds, this parameter returns the value of the discreteOrMinValue field of the entry. You can pass VI_NULL for the parameter if you are not interested in this value. |
| maxValue | ViReal64* |
If the search succeeds, this parameter returns the value of the maxValue field of the entry. You can pass VI_NULL for the parameter if you are not interested in this value. |
| tableIndex | ViInt32* |
If the search succeeds, this parameter returns the 0-based index of the entry. You can pass VI_NULL for the parameter if you are not interested in this value. |
| commandString | ViString* |
If the search succeeds, this parameter returns the pointer in the cmdString field of the entry. Do not change the contents of the string. You can pass VI_NULL for the parameter if you are not interested in this value. |
| commandValue | ViInt32* |
Specify the command value that you want to find in the range table. |
Return Value
Contains the status code that the function call returns. IVI engine functions can return error and warning values from several sets of status codes. Some status codes are unique to the IVI engine. Other status codes are the same codes that VISA Library functions return. Still others are error or warning values that functions in specific instrument drivers return. Each set of status codes has its own numeric range.
Regardless of the source of the status code, 0 always indicates success, a positive value indicates a warning, and a negative value indicates an error.