/************************************************************************
** DA_READ								*
**									*
** This function will read the specified number of bytes from		*
** the given file.							*
**									*
** DA_READ ( IFDES, NBYTE, IOFFST, BUFR, IRET ) 			*
** 									*
** Input parameters:							*
**	IFDES		INT*		File descriptor			*
**	NBYTE		INT*		The number of bytes to read	*
**	IOFFST		INT* 		The offset in the file		*
**									*
** Output parameters:							*
**	BUFR		CHAR*		Data read from the file		*
***									*
** Log:									*
** J. Chou/EAI		02/93						*
** J. Chou/EAI		07/93						*
************************************************************************/

#include "dacmn.h"

void da_read ( ifdes, nbyte, ioffst, bufr, iret )

int		*ifdes;
int		*nbyte;
int		*ioffst;
unsigned char	*bufr;
int		*iret;

{
	int		no_byte;
	int		offset;
	unsigned char   **buffer;
	no_byte = *nbyte;
	offset  = *ioffst;
	buffer  = &bufr;
/*
**	Move the file pointer to the starting byte of the section.
*/
	lseek ( *ifdes, offset, SEEK_SET );

/*
**	Read the data from file to the buffer. Return the
**	number of bytes.
*/
	if ( ( *iret = read ( *ifdes, *buffer, no_byte ) ) == no_byte )
	    *iret = 0;
	else
	    *iret = -1;
}