Cogent C API and Utilities : Version 6.4
	Cascade Historian Functions

`HI_Count`

HI_Count — counts the number of histories that match a pattern.

Syntax

#include <cogent.h>
ST_STATUS HI_Count( IP_hTASK   historian, 
  char*   retbuf, 
  int   buflen, 
  char*   histpattern, 
  int*   count);

Arguments

historian: The task pointer to the Cascade Historian program.
retbuf: An optional buffer containing an error message.
buflen: The length in bytes of retbuf. If retbuf is non-NULL, this must be a valid non-zero length. If retbuf is NULL, this parameter is ignored.
histpattern: A globbing pattern specifying a group of histories.
count: Return value containing the number of histories.

Returns

ST_OK on success. Otherwise ST_ERROR, and the retbuf will contain a NULL-terminated character string with an error message. If the return value is ST_OK, the retbuf may not contain useful information.

Description

This function queries the Cascade Historian for the total number of histories currently being kept that match the given pattern.

This function corresponds to the Cascade Historian count command and the hist_count dynamic library function.

`ST_STATUS HI_Count(`	IP_hTASK	`historian`,
	char*	`retbuf`,
	int	`buflen`,
	char*	`histpattern`,
	int*	`count)`;


HI_ClipBuffer		HI_Deadband