PNG_CRC
The PNG Cyclic Redundancy Checksum

PNG_CRC is a C++ program which computes the PNG CRC (cyclic redundancy checksum) for one or more files.

Usage:

png_crc files

computs the cyclic redundancy checksum for the given list of files.

Languages:

PNG_CRC is available in a C++ version.

Related Data and Programs:

CRC, a C++ library which computes the cyclic redundancy checksum (CRC) as used by the PNG data format.

PNG, a data directory which contains information and examples of PNG files.

Reference:

1. David Duce, editor,
   Portable Network Graphics (PNG) Specification,
   Second Edition.
   Technical Report REC-PNG-20031110,
   World Wide Web Consortium, 2003.

Source code:

• png_crc.cpp, the source code;
• png_crc.sh, commands to compile and load the source code;

List of Routines:

• PNG_CRC computes the PNG CRC of a file.
• HANDLE computes the PNG CRC of a single file.
• MAKE_CRC_TABLE makes the table for a fast CRC computation.
• TIMESTAMP prints the current YMDHMS date as a time stamp.
• UPDATE_CRC_C updates a running CRC with one more character.

You can go up one level to the C++ source codes.