From ead3efbdd94a0f2a00d315fb955c39f92811b0a5 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Roland=20H=C3=A4der?= <haeder@hmmdeutschland.de>
Date: Mon, 28 Apr 2014 14:53:25 +0200
Subject: [PATCH] Added check-point file.
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Signed-off-by: Roland Häder <haeder@hmmdeutschland.de>
---
 contrib/chash/chash.php | 28 +++++++++++++++++++++++++---
 1 file changed, 25 insertions(+), 3 deletions(-)

diff --git a/contrib/chash/chash.php b/contrib/chash/chash.php
index 6705b960..1059641f 100644
--- a/contrib/chash/chash.php
+++ b/contrib/chash/chash.php
@@ -5,6 +5,7 @@ define('HASH_ALGO', MHASH_RIPEMD320);
 define('BLOCK_SIZE', 100);
 define('NONCE_INCREMENT', 0.0000000000000001);
 define('START_TIME', microtime(TRUE));
+define('CHECK_POINT', 'chash.pos');
 
 // Found hashes
 $foundHashes = array();
@@ -240,9 +241,27 @@ $totalReward = 0;
 $totalHashes = 0;
 $totalBlocks = 0;
 
-// Create nonce (small)
-$nonce = 1 / mt_rand();
+// Is the check point there?
+if (is_readable(CHECK_POINT)) {
+	// Then load it
+	$checkPoint = file_get_contents(CHECK_POINT);
 
+	// Explode it
+	$data = explode(':', $checkPoint);
+
+	// 1st element is nonce, 2nd hash
+	$nonce = $data[0];
+	$modulaHash = $data[1];
+} else {
+	// Create nonce (small)
+	$nonce = 1 / mt_rand();
+}
+
+// Output again
+print ('modulaHash=' . $modulaHash . PHP_EOL);
+print ('nonce=' . $nonce . PHP_EOL);
+
+// Start "mining"
 while (TRUE) {
 	// Init hash-per-block counter and hashrate
 	$hashesPerBlock = 0;
@@ -322,7 +341,10 @@ while (TRUE) {
 		array_push($foundHashes, $nonceHash);
 
 		// Found hash:
-		print ('FOUND: nonceHash=' . $nonceHash .',nonce=' . $nonce . ',iter=' . $iter . PHP_EOL);
+		print ('FOUND: nonceHash=' . $nonceHash . ',nonce=' . $nonce . ',iter=' . $iter . PHP_EOL);
+
+		// Write check-point
+		file_put_contents(CHECK_POINT, $nonce . ':' . $nonceHash);
 
 		// Use nonceHash as next modula hash
 		$modulaHash = $nonceHash;
-- 
2.30.2