1 /* $NetBSD: refidsmear.c,v 1.1.1.2 2015/07/10 13:11:13 christos Exp $ */ 2 3 #include "config.h" 4 5 #include <ntp.h> 6 #include <ntp_fp.h> 7 #include <refidsmear.h> 8 9 //#include "ntp_stdlib.h" 10 //#include "ntp_calendar.h" 11 12 #include "unity.h" 13 14 #include <stdio.h> 15 16 /* 17 * we want to test a refid format of: 18 * 254.x.y.x 19 * 20 * where x.y.z are 24 bits containing 2 (signed) integer bits 21 * and 22 fractional bits. 22 * 23 * we want functions to convert to/from this format, with unit tests. 24 * 25 * Interesting test cases include: 26 * 254.0.0.0 27 * 254.0.0.1 28 * 254.127.255.255 29 * 254.128.0.0 30 * 254.255.255.255 31 */ 32 33 void rtol(uint32_t r, char *es); 34 35 void 36 rtol(uint32_t r, char *es) 37 { 38 l_fp l; 39 char *as; 40 char msg[100]; 41 42 TEST_ASSERT_NOT_NULL(es); 43 44 snprintf(msg, 100, "rtol was called with r=%#.8x, es=%s", r, es); 45 46 l = convertRefIDToLFP(htonl(r)); 47 as = lfptoa(&l, 8); 48 49 //printf("refid %#x, smear %s\n", r, as); 50 51 TEST_ASSERT_NOT_NULL_MESSAGE(as, msg); 52 TEST_ASSERT_EQUAL_STRING_MESSAGE(es, as, msg); 53 54 return; 55 } 56 57 58 void rtoltor(uint32_t er, char *es); 59 60 void 61 rtoltor(uint32_t er, char *es) 62 { 63 l_fp l; 64 char *as; 65 uint32_t ar; 66 char msg[100]; 67 68 TEST_ASSERT_NOT_NULL(es); 69 70 snprintf(msg, 100, "rtoltor was called with er=%#.8x, es=%s", er, es); 71 72 l = convertRefIDToLFP(htonl(er)); 73 as = lfptoa(&l, 8); 74 75 ar = convertLFPToRefID(l); 76 77 //printf("smear %s, refid %#.8x\n", lfptoa(&l, 8), ntohl(ar)); 78 79 TEST_ASSERT_NOT_NULL_MESSAGE(as, msg); 80 TEST_ASSERT_EQUAL_STRING_MESSAGE(es, as, msg); 81 TEST_ASSERT_EQUAL_UINT_MESSAGE(er, ntohl(ar), msg); 82 83 return; 84 } 85 86 87 void ltor(l_fp l, char *er); 88 89 void 90 ltor(l_fp l, char *er) 91 { 92 uint32_t r; 93 94 printf("ltor: "); 95 96 r = convertLFPToRefID(l); 97 printf("smear %s, refid %#.8x\n", lfptoa(&l, 8), ntohl(r)); 98 99 return; 100 } 101 102 103 void test_refidsmear(void) 104 { 105 106 rtol(0xfe800000, "-2.00000000"); 107 rtol(0xfe800001, "-1.99999976"); 108 rtol(0xfe8ffffe, "-1.75000048"); 109 rtol(0xfe8fffff, "-1.75000024"); 110 rtol(0xfef00000, "-0.25000000"); 111 rtol(0xfef00001, "-0.24999976"); 112 rtol(0xfefffffe, "-0.00000048"); 113 rtol(0xfeffffff, "-0.00000024"); 114 115 rtol(0xfe000000, "0.00000000"); 116 rtol(0xfe000001, "0.00000024"); 117 rtol(0xfe6ffffe, "1.74999952"); 118 rtol(0xfe6fffff, "1.74999976"); 119 rtol(0xfe700000, "1.75000000"); 120 rtol(0xfe700001, "1.75000024"); 121 rtol(0xfe7ffffe, "1.99999952"); 122 rtol(0xfe7fffff, "1.99999976"); 123 124 rtoltor(0xfe800000, "-2.00000000"); 125 rtoltor(0xfe800001, "-1.99999976"); 126 rtoltor(0xfe8ffffe, "-1.75000048"); 127 rtoltor(0xfe8fffff, "-1.75000024"); 128 rtoltor(0xfef00000, "-0.25000000"); 129 rtoltor(0xfef00001, "-0.24999976"); 130 rtoltor(0xfefffffe, "-0.00000048"); 131 rtoltor(0xfeffffff, "-0.00000024"); 132 133 rtoltor(0xfe000000, "0.00000000"); 134 rtoltor(0xfe000001, "0.00000024"); 135 rtoltor(0xfe6ffffe, "1.74999952"); 136 rtoltor(0xfe6fffff, "1.74999976"); 137 rtoltor(0xfe700000, "1.75000000"); 138 rtoltor(0xfe700001, "1.75000024"); 139 rtoltor(0xfe7ffffe, "1.99999952"); 140 rtoltor(0xfe7fffff, "1.99999976"); 141 142 return; 143 } 144