CHKHASH

Description

CHKHASH performs hash checksum verifications for a series of images, as specified in the input hash text file, and generates a report on the images that pass and fail.

Parameters

chkhash(tfile)

Name	Type	Caption	Length	Value range
TFILE *	str	Input hash text file	1 -

* Required parameter

Parameter descriptions

TFILE

Specifies the name of the text file containing the image files, channels, and windows to verify.

Details

CHKHASH performs a hashing function checksum test on all the images in the provided test file (TFILE). The input text file is generated by GENHASH. The CHKHASH procedure is generally used to perform regression testing on the GDB library, across various platforms.

Any GDB-supported image formats can be used as input. For detailed information about the input text file, refer to the documentation.

The report is written to the screen, indicating whether each image passed or failed the checksum comparison.

Example

Generate a hashing test file for the specified channels and bitmaps on irvine.pix and the specified channel on eltoro.pix from the Demo folder. Then run CHKHASH to verify the hash values. This operation will work on any supported platform, not only the platform on which the hash file was generated.

from pci.chkhash import chkhash
from pci.genhash import genhash

tfile = "pcidemo.hsh"
file  = r"/demo/irvine.pix"
dbic  = [1,2,3,4,5]
dbib  = [9,10,11,12]
dbvs  = []
dbiw  = []
genhash(tfile, file, "ALL", dbic, dbib, dbvs, dbiw)

file  = r"/demo/eltoro.pix"
dbic = [1]
dbib = []
genhash(tfile, file, "ALL", dbic, dbib, dbvs, dbiw)

chkhash (tfile)