#include "PGS_MODIS_35005.h"
#include "PGS_SMF.h"
#include "hdfi.h"
#include "L1A_prototype.h"

Include dependency graph for extr_bits.c:

Functions
uint32	extr_bits (uint8 *a, int start_bit, int start_byte, int num_bits)

Function Documentation

◆ extr_bits()

Not able to extract that many bits, so just return error msg

Calculate the end byte and bit

Build the extracted number

Start byte

shift right the hexadecimal constant "Oxff"

(start_bit) times and AND it to a[start_byte],

then ret = the result

Middle byte

shift left ret 8 times and OR it with a[i] and

ret = the result

End byte

shift right a[end_byte] (7 - end_bit) times and

AND it with the hexadecimal constant "0xff",

then OR this with the result of ret shifted

left (end_bit + 1) times, then ret = the result

shift right ret (7 - end_bit) times andi,

ret = the result

Definition at line 6 of file extr_bits.c.