TipcMsgNextReal4Array

Name

TipcMsgNextReal4Array — get a field containing an array of REAL4 fields from a message

Synopsis

T_BOOL TipcMsgNextReal4Array(msg, real4_array_return, array_size_return) 
T_IPC_MSG msg; 
T_REAL4 **real4_array_return; 
T_INT4 *array_size_return;

Arguments

msg — message to get field from

real4_array_return — storage for REAL4_ARRAY value from field

array_size_return — storage for number of elements in array

Return Values

TRUE if the field was successfully retrieved from the message, FALSE otherwise.

Diagnostics

If TipcMsgNextReal4Array fails, it returns FALSE and sets the global SmartSockets error number to one of:

T_ERR_NULL_PTR — msg was null, real4_array_return was null, or array_size_return was null

T_ERR_MSG_INVALID — msg was not a valid message

T_ERR_MSG_EOM — the current field is at the end of message

T_ERR_FT_MISMATCH — the current field is of the wrong type

T_ERR_VAL_UNKNOWN — the current field is of unknown value

Description

TipcMsgNextReal4Array retrieves the value of the current field of a message, which must be a REAL4_ARRAY (array of four-byte real numbers) field. If TipcMsgNextReal4Array succeeds, it advances the current field to the next field in the message.

TipcMsgNextReal4Array converts the field into the data format used by this process if necessary.

Caution

If TipcMsgNextReal4Array returns FALSE, it does not store values in real4_array_return and array_size_return.

Do not modify the value stored in real4_array_return. It points directly into an internal data structure.

Examples

This example reads a REAL4_ARRAY field from a message and prints the values in the array:

T_REAL4 *real4_array; 
T_INT4 array_size; 
T_INT4 counter; 
 
if (!TipcMsgNextReal4Array(msg, &real4_array, &array_size)) { 
  return;  /* error */ 
}  
TutOut("array_size = %d\n", array_size); 
 
for (counter = 0; counter < array_size; counter++) { 
  TutOut("real4_array[%d] = %s\n", counter,  
         TutRealToStr(real4_array[counter])); 
}