thodg/cgminer

diff --git a/main.c b/main.c
index 94f757a..3f392e8 100644
--- a/main.c
+++ b/main.c
@@ -217,7 +217,7 @@ static int opt_n_threads;
 static int mining_threads;
 static int num_processors;
 static int scan_intensity;
-static bool use_curses = true;
+bool use_curses = true;
 static bool opt_submit_stale;
 static bool opt_nogpu;
 static bool opt_usecpu;
@@ -2005,13 +2005,19 @@ void clear_logwin(void)
 	}
 }
 
-/* regenerate the full work->hash value */
-void regeneratehash(const struct work *work)
+/* regenerate the full work->hash value and also return true if it's a block */
+bool regeneratehash(const struct work *work)
 {
 	uint32_t *data32 = (uint32_t *)(work->data);
 	unsigned char swap[128];
 	uint32_t *swap32 = (uint32_t *)swap;
 	unsigned char hash1[SHA256_DIGEST_LENGTH];
+	uint32_t *hash32 = (uint32_t *)(work->hash);
+	uint32_t difficulty = 0;
+	uint32_t diffbytes = 0;
+	uint32_t diffvalue = 0;
+	uint32_t diffcmp[8];
+	int diffshift = 0;
 	int i;
 
 	for (i = 0; i < 80/4; i++)
@@ -2019,6 +2025,36 @@ void regeneratehash(const struct work *work)
 
 	SHA256(swap, 80, hash1);
 	SHA256(hash1, SHA256_DIGEST_LENGTH, (unsigned char *)(work->hash));
+
+	difficulty = swab32(*((uint32_t *)(work->data + 72)));
+
+	diffbytes = ((difficulty >> 24) & 0xff) - 3;
+	diffvalue = difficulty & 0x00ffffff;
+
+	diffshift = (diffbytes % 4) * 8;
+	if (diffshift == 0) {
+		diffshift = 32;
+		diffbytes--;
+	}
+
+	memset(diffcmp, 0, 32);
+	diffcmp[(diffbytes >> 2) + 1] = diffvalue >> (32 - diffshift);
+	diffcmp[diffbytes >> 2] = diffvalue << diffshift;
+
+	for (i = 7; i >= 0; i--) {
+		if (hash32[i] > diffcmp[i])
+			return false;
+		if (hash32[i] < diffcmp[i])
+			return true;
+	}
+
+	// https://en.bitcoin.it/wiki/Block says: "numerically below"
+	// https://en.bitcoin.it/wiki/Target says: "lower than or equal to"
+	// code in bitcoind 0.3.24 main.cpp CheckWork() says: if (hash > hashTarget) return false;
+	if (hash32[0] == diffcmp[0])
+		return true;
+	else
+		return false;
 }
 
 static bool submit_upstream_work(const struct work *work)
@@ -2033,7 +2069,8 @@ static bool submit_upstream_work(const struct work *work)
 	struct pool *pool = work->pool;
 	bool rolltime;
 	uint32_t *hash32;
-	char hashshow[32+1] = "";
+	char hashshow[64+1] = "";
+	bool isblock;
 
 	if (unlikely(!curl)) {
 		applog(LOG_ERR, "CURL initialisation failed");
@@ -2074,11 +2111,11 @@ static bool submit_upstream_work(const struct work *work)
 	res = json_object_get(val, "result");
 
 	if (!QUIET) {
-		regeneratehash(work);
+		isblock = regeneratehash(work);
 		hash32 = (uint32_t *)(work->hash);
-		sprintf(hashshow, "%08lx%08lx%08lx%08lx",
-			(unsigned long)(hash32[7]), (unsigned long)(hash32[6]),
-			(unsigned long)(hash32[5]), (unsigned long)(hash32[4]));
+		sprintf(hashshow, "%08lx.%08lx.%08lx%s",
+			(unsigned long)(hash32[7]), (unsigned long)(hash32[6]), (unsigned long)(hash32[5]),
+			isblock ? " BLOCK!" : "");
 	}
 
 	/* Theoretically threads could race when modifying accepted and
@@ -2092,10 +2129,10 @@ static bool submit_upstream_work(const struct work *work)
 			applog(LOG_DEBUG, "PROOF OF WORK RESULT: true (yay!!!)");
 		if (!QUIET) {
 			if (total_pools > 1)
-				applog(LOG_NOTICE, "Accepted %.32s %sPU %d thread %d pool %d",
+				applog(LOG_NOTICE, "Accepted %s %sPU %d thread %d pool %d",
 				       hashshow, cgpu->is_gpu? "G" : "C", cgpu->cpu_gpu, thr_id, work->pool->pool_no);
 			else
-				applog(LOG_NOTICE, "Accepted %.32s %sPU %d thread %d",
+				applog(LOG_NOTICE, "Accepted %s %sPU %d thread %d",
 				       hashshow, cgpu->is_gpu? "G" : "C", cgpu->cpu_gpu, thr_id);
 		}
 		if (opt_shares && total_accepted >= opt_shares) {
@@ -2111,10 +2148,10 @@ static bool submit_upstream_work(const struct work *work)
 			applog(LOG_DEBUG, "PROOF OF WORK RESULT: false (booooo)");
 		if (!QUIET) {
 			if (total_pools > 1)
-				applog(LOG_NOTICE, "Rejected %.32s %sPU %d thread %d pool %d",
+				applog(LOG_NOTICE, "Rejected %s %sPU %d thread %d pool %d",
 				       hashshow, cgpu->is_gpu? "G" : "C", cgpu->cpu_gpu, thr_id, work->pool->pool_no);
 			else
-				applog(LOG_NOTICE, "Rejected %.32s %sPU %d thread %d",
+				applog(LOG_NOTICE, "Rejected %s %sPU %d thread %d",
 				       hashshow, cgpu->is_gpu? "G" : "C", cgpu->cpu_gpu, thr_id);
 		}
 	}
diff --git a/util.c b/util.c
index 1fddead..6a53d94 100644
--- a/util.c
+++ b/util.c
@@ -65,6 +65,8 @@ struct tq_ent {
 
 void vapplog(int prio, const char *fmt, va_list ap)
 {
+	extern bool use_curses;
+
 #ifdef HAVE_SYSLOG_H
 	if (use_syslog) {
 		vsyslog(prio, fmt, ap);
@@ -84,7 +86,7 @@ void vapplog(int prio, const char *fmt, va_list ap)
 
 		len = 40 + strlen(fmt) + 22;
 		f = alloca(len);
-		sprintf(f, "[%d-%02d-%02d %02d:%02d:%02d] %s                    \n",
+		sprintf(f, "[%d-%02d-%02d %02d:%02d:%02d] %s\n",
 			tm.tm_year + 1900,
 			tm.tm_mon + 1,
 			tm.tm_mday,
@@ -100,7 +102,16 @@ void vapplog(int prio, const char *fmt, va_list ap)
 			vfprintf(stderr, f, apc);	/* atomic write to stderr */
 			fflush(stderr);
 		}
-		log_curses(prio, f, ap);
+
+		if (use_curses)
+			log_curses(prio, f, ap);
+		else {
+			int len = strlen(f);
+
+			strcpy(f + len - 1, "                    \n");
+
+			log_curses(prio, f, ap);
+		}
 	}
 }