sizeof

• purpose
• usage
• examples
• comments

Purpose:

This program is provided as a convenience for programmers and developers to verify that data is being represented correctly in the AIR package. For AIR versions 3.02 and higher, the program also stores the AIR version and compile time configuration of AIR.

Usage:

sizeof

Examples:

sizeof

The following lists the sizes of various structures and variable types on the machine you are running. The sizes of the same structures and variable types in the development environment are listed in parentheses.
 
struct key_info 40 (40)
struct air16 720 (720)
struc oldair 688 (688)
struct hdr 348 (348)
my_pixels 1 (1 or 2)
 
short int 2 (2)
int 4 (4)
long int 4 (4)
unsigned short int 2 (2)
unsigned int 4 (4)
unsigned long int 4 (4)
char 1 (1)
unsigned char 1 (1)
float 4 (4)
double 8 (8)
 
This is AIR version 3.02
 
Compile time options from AIR.h
PLATF 3
RADIX 2
VERBOSITY 0
PIX_SIZE_ERR 1.000000e-4
PIXEL_MAX_SIZE 1.000000e+01
PIXEL_MIN_SIZE 1.000000e-01
OLD_ANALYZE 0
COMPRESS 1
CLOCK 0
OUTBITS 8
THRESHOLD1 55
THRESHOLD2 55
MAX_POSS_VALUE 255
HDR_SUFF .hdr
IMG_SUFF .img
LOGFILE
NORM_SUFF .nrm
 
The correct radix value for this machine is 2.

Comments:

• The first segment of the output shows your compilers size for various data types and the corresponding sizes in the AIR development environment.
• The compile time options are described on the page pertaining to configuring AIR.h.
• The method used to compute radix values may fail on some machines. Usually this will result in a message indicating that the program is unable to compute the radix, but in other cases it might crash. Compiling 'sizeof' with a different optimization level (e.g., -O0 instead of -O2) may help.
• The program will generate warnings if the AIR.h configuration on this machine will result in fatal problems when using AIR.
• Versions of AIR before 3.02 will not print out version number, configuration, or radix information and wil not generate warnings of fatal problems.