X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=hamming32.c;h=9b8576b2a04631be46e8ca29600209f3ccbedd89;hb=30ef48a829b34154438763e3bcfe9e2a9352c48b;hp=2d8b882c7fdefeb8b6adb13ced7ce9918a02b150;hpb=7ad344802d7f2865832ac37ab032365a5fbeaab9;p=hamming

diff --git a/hamming32.c b/hamming32.c
index 2d8b882..9b8576b 100644
--- a/hamming32.c
+++ b/hamming32.c
@@ -52,7 +52,6 @@ int has_error(unsigned code)
 
 int has_double_error(unsigned code)
 {
-	unsigned i;
 	unsigned data = code >> PARITY_BITS;
 	unsigned parity = code & ((1 << PARITY_BITS) - 1);
 	unsigned gen_parity = generate_parity(data);
@@ -101,10 +100,17 @@ unsigned correct_single_bit_error(unsigned code)
 void check_zero_bit_detection()
 {
 	unsigned i;
-	printf("Checking zero bit detection.\n");
+	printf("Checking zero bit detection.");
+	fflush(stdout);
 
 	for (i = 0; i < NUM_DATA_WORDS; ++i) {
 		unsigned code = make_codeword(i);
+
+		if ((i & 0xfffff) == 0) {
+			printf(".");
+			fflush(stdout);
+		}
+		
 		if (has_error(code)) {
 			printf("ERROR: Failed zero-bit test 1 for %x\n", i);
 		}
@@ -112,15 +118,24 @@ void check_zero_bit_detection()
 			printf("ERROR: Failed zero-bit test 2 for %x\n", i);
 		}
 	}
+
+	printf("\n");
 }
 
 void check_single_bit_detection()
 {
 	unsigned i, j;
-	printf("Checking single bit detection and correction.\n");
+	printf("Checking single bit detection and correction.");
+	fflush(stdout);
 
 	for (i = 0; i < NUM_DATA_WORDS; ++i) {
 		unsigned code = make_codeword(i);
+
+		if ((i & 0xfffff) == 0) {
+			printf(".");
+			fflush(stdout);
+		}
+		
 		for (j = 0; j < CODE_BITS; ++j) {
 			unsigned corrupted_code = code ^ (1 << j);
 			
@@ -135,15 +150,24 @@ void check_single_bit_detection()
 			}
 		}
 	}
+
+	printf("\n");
 }
 
 void check_double_bit_detection()
 {
 	unsigned i, j, k;
-	printf("Checking double bit detection.\n");
+	printf("Checking double bit detection.");
+	fflush(stdout);
 
 	for (i = 0; i < NUM_DATA_WORDS; ++i) {
 		unsigned code = make_codeword(i);
+		
+		if ((i & 0xfffff) == 0) {
+			printf(".");
+			fflush(stdout);
+		}
+		
 		for (j = 0; j < CODE_BITS; ++j) {
 			for (k = 0; k < CODE_BITS; ++k) {
 				unsigned corrupted_code = code ^ (1 << j) ^ (1 << k);
@@ -159,6 +183,8 @@ void check_double_bit_detection()
 			}
 		}
 	}
+
+	printf("\n");
 }
 
 int main()