Michael Schiemer
fc3d7e6357
- Add comprehensive health check system with multiple endpoints - Add Prometheus metrics endpoint - Add production logging configurations (5 strategies) - Add complete deployment documentation suite: * QUICKSTART.md - 30-minute deployment guide * DEPLOYMENT_CHECKLIST.md - Printable verification checklist * DEPLOYMENT_WORKFLOW.md - Complete deployment lifecycle * PRODUCTION_DEPLOYMENT.md - Comprehensive technical reference * production-logging.md - Logging configuration guide * ANSIBLE_DEPLOYMENT.md - Infrastructure as Code automation * README.md - Navigation hub * DEPLOYMENT_SUMMARY.md - Executive summary - Add deployment scripts and automation - Add DEPLOYMENT_PLAN.md - Concrete plan for immediate deployment - Update README with production-ready features All production infrastructure is now complete and ready for deployment.
77 lines
2.0 KiB
PHP
77 lines
2.0 KiB
PHP
<?php
|
|
|
|
/**
|
|
* Generate correct Format Information table with BCH error correction
|
|
* Based on ISO/IEC 18004 specification
|
|
*/
|
|
|
|
echo "=== Generating Correct Format Information Table ===\n\n";
|
|
|
|
// EC Level encoding (ISO/IEC 18004)
|
|
$ecLevels = [
|
|
'L' => 0b01, // Level L
|
|
'M' => 0b00, // Level M
|
|
'Q' => 0b11, // Level Q
|
|
'H' => 0b10, // Level H
|
|
];
|
|
|
|
// BCH(15,5) generator polynomial: x^10 + x^8 + x^5 + x^4 + x^2 + x + 1
|
|
// Binary: 10100110111
|
|
$bchGenerator = 0b10100110111;
|
|
|
|
function calculateBCH(int $data): int
|
|
{
|
|
global $bchGenerator;
|
|
|
|
// Shift data left by 10 bits (for 10 BCH parity bits)
|
|
$remainder = $data << 10;
|
|
|
|
// Perform polynomial division
|
|
for ($i = 4; $i >= 0; $i--) {
|
|
if (($remainder >> (10 + $i)) & 1) {
|
|
$remainder ^= ($bchGenerator << $i);
|
|
}
|
|
}
|
|
|
|
return $remainder & 0b1111111111; // 10 bits
|
|
}
|
|
|
|
function applyMask(int $formatBits): int
|
|
{
|
|
// XOR mask: 101010000010010
|
|
$mask = 0b101010000010010;
|
|
return $formatBits ^ $mask;
|
|
}
|
|
|
|
echo "Generating format information for all EC levels and mask patterns:\n\n";
|
|
|
|
foreach ($ecLevels as $levelName => $ecBits) {
|
|
echo "'{$levelName}' => [\n";
|
|
|
|
for ($maskPattern = 0; $maskPattern <= 7; $maskPattern++) {
|
|
// Combine EC level (2 bits) and mask pattern (3 bits) = 5 data bits
|
|
$dataBits = ($ecBits << 3) | $maskPattern;
|
|
|
|
// Calculate BCH error correction (10 bits)
|
|
$bchBits = calculateBCH($dataBits);
|
|
|
|
// Combine data and BCH (15 bits total)
|
|
$formatBits = ($dataBits << 10) | $bchBits;
|
|
|
|
// Apply XOR mask
|
|
$maskedFormat = applyMask($formatBits);
|
|
|
|
$binary = sprintf('%015b', $maskedFormat);
|
|
$octal = sprintf('0b%015b', $maskedFormat);
|
|
|
|
// Verify
|
|
$ecPart = substr($binary, 0, 2);
|
|
$maskPart = substr($binary, 2, 3);
|
|
|
|
echo " {$maskPattern} => {$octal}, // Level {$levelName}, Mask {$maskPattern} ";
|
|
echo "(EC={$ecPart}, Mask={$maskPart})\n";
|
|
}
|
|
|
|
echo "],\n";
|
|
}
|