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0006-limits.c - scc - simple c99 compiler
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---
0006-limits.c (4279B)
---
1 #include <limits.h>
2 #include <stdio.h>
3
4 /*
5 * This test assumes that CHAR_BIT is the size of every
6 * unit returned by sizeof. It also assumes 2 complement.
7 */
8
9 /*
10 output:
11 test1
12 test2
13 test3
14 end:
15 */
16
17 void
18 test1()
19 {
20 puts("test1");
21
22 if (CHAR_BIT < 8 ||
23 CHAR_MAX < 127 || CHAR_MIN > 0 ||
24 CHAR_MAX != SCHAR_MAX && CHAR_MAX != UCHAR_MAX)
25 puts("wrong char definition");
26
27 if (SCHAR_MAX < 127 || CHAR_MIN > -127)
28 puts("wrong signed char definition");
29
30 if (UCHAR_MAX < 255 || UCHAR_MAX <= 0)
31 puts("wrong unsigned char definition");
32
33 if (SHRT_MAX < 32767 ||
34 SHRT_MIN > -32767 ||
35 USHRT_MAX < 65535 || USHRT_MAX <= 0)
36 puts("wrong short definition");
37
38 if (INT_MAX < 32767 ||
39 INT_MIN > -32767 ||
40 UINT_MAX < 65535 || UINT_MAX <= 0 ||
41 INT_MAX < SCHAR_MAX || INT_MIN > SCHAR_MIN ||
42 UINT_MAX < UCHAR_MAX ||
43 INT_MAX < SHRT_MAX || INT_MIN > SHRT_MIN ||
44 UINT_MAX < USHRT_MAX)
45 puts("wrong int definition");
46
47 if (LONG_MAX < 2147483647 ||
48 LONG_MIN > -2147483647 ||
49 ULONG_MAX < 4294967295 || ULONG_MAX <= 0 ||
50 LONG_MAX < SCHAR_MAX || LONG_MIN > SCHAR_MIN ||
51 ULONG_MAX < UCHAR_MAX ||
52 LONG_MAX < SHRT_MAX || LONG_MIN > SHRT_MIN ||
53 ULONG_MAX < USHRT_MAX ||
54 LONG_MAX < INT_MAX || LONG_MIN > INT_MIN ||
55 ULONG_MAX < UINT_MAX)
56 puts("wrong long definition");
57
58 if (LONG_MAX < 9223372036854775807 ||
59 LONG_MIN > -9223372036854775807 ||
60 ULONG_MAX < 18446744073709551615 || ULONG_MAX <= 0 ||
61 LONG_MAX < SCHAR_MAX || LONG_MIN > SCHAR_MIN ||
62 ULONG_MAX < UCHAR_MAX ||
63 LONG_MAX < SHRT_MAX || LONG_MIN > SHRT_MIN ||
64 ULONG_MAX < USHRT_MAX ||
65 LONG_MAX < LONG_MAX || LONG_MIN > LONG_MIN ||
66 ULONG_MAX < ULONG_MAX)
67 puts("wrong long definition");
68
69 if (LLONG_MAX < 9223372036854775807 ||
70 LLONG_MIN > -9223372036854775807 ||
71 ULLONG_MAX < 18446744073709551615 || ULLONG_MAX <= 0 ||
72 LLONG_MAX < SCHAR_MAX || LLONG_MIN > SCHAR_MIN ||
73 ULLONG_MAX < UCHAR_MAX ||
74 LLONG_MAX < SHRT_MAX || LLONG_MIN > SHRT_MIN ||
75 ULLONG_MAX < USHRT_MAX ||
76 LLONG_MAX < LONG_MAX || LLONG_MIN > LONG_MIN ||
77 ULLONG_MAX < ULONG_MAX)
78 puts("wrong long long definition");
79
80 if (MB_LEN_MAX < sizeof(char))
81 puts("wrong value for MB_LEN_MAX");
82 }
83
84
85 void
86 test2()
87 {
88 char c;
89 int i;
90
91 puts("test2");
92 if ('\xff' > 0) {
93 for (c = i = 0; i < CHAR_BIT; i++) {
94 c <<= 1;
95 c |= 1;
96 }
97 if (c != CHAR_MAX)
98 printf("wrong char max %d-%d", c, CHAR_MAX);
99 if (CHAR_MIN != 0)
100 printf("wrong char min %d-%d", c, CHAR_MIN);
101 } else {
102 for (c = i = 0; i < CHAR_BIT -1; i++) {
103 c <<= 1;
104 c |= 1;
105 }
106 if (c != CHAR_MAX)
107 printf("wrong char max %d-%d", c, CHAR_MAX);
108 c = -c - 1;
109 if (c != CHAR_MIN)
110 printf("wrong char min %d-%d", c, CHAR_MIN);
111 }
112 }
113
114 #define SMAX(t) for (t = n = 0; n < sizeof(t)*CHAR_BIT -1; n++) {t <<= 1; t |= 1;}
115 #define UMAX(t) for (t = n = 0; n < sizeof(t)*CHAR_BIT; n++) {t <<= 1; t |= 1;}
116
117 void
118 test3()
119 {
120 signed char sc;
121 unsigned char uc;
122 int i, n;
123 unsigned u;
124 long l;
125 unsigned long ul;
126 long long ll;
127 unsigned long long ull;
128
129 puts("test3");
130 SMAX(sc);
131 if (sc != SCHAR_MAX)
132 printf("wrong signed char max %d %d\n", sc, SCHAR_MAX);
133 sc = -sc - 1;
134 if (sc != SCHAR_MIN)
135 printf("wrong signed char min %d %d\n", sc, SCHAR_MIN);
136
137 UMAX(uc);
138 if (uc != UCHAR_MAX)
139 printf("wrong unsigned char max %u %u", uc, UCHAR_MAX);
140
141 SMAX(i);
142 if (i != INT_MAX)
143 printf("wrong int max %d %d\n", i, INT_MAX);
144 i = -i - 1;
145 if (i != INT_MIN)
146 printf("wrong int min %d %d\n", i, INT_MIN);
147
148 UMAX(u);
149 if (u != UINT_MAX)
150 printf("wrong unsigned int max %u %u\n", u, UINT_MAX);
151
152 SMAX(l);
153 if (l != LONG_MAX)
154 printf("wrong long max %ld %ld\n", l, (long) LONG_MAX);
155 l = -l - 1;
156 if (l != LONG_MIN)
157 printf("wrong long max %ld %ld\n", l, (long) LONG_MIN);
158
159 UMAX(ul);
160 if (ul != ULONG_MAX)
161 printf("wrong int max %lu %lu\n", ul, (unsigned long) ULONG_MAX);
162
163 SMAX(ll);
164 if (ll != LLONG_MAX)
165 printf("wrong llong max %lld %lld\n", ll, (long long) LLONG_MAX);
166 ll = -ll - 1;
167 if (ll != LLONG_MIN)
168 printf("wrong llong min %lld %lld\n", ll, (long long) LLONG_MIN);
169
170 UMAX(ull);
171 if (ull != ULLONG_MAX)
172 printf("wrong ullong max %llu %llu\n", ull, (unsigned long long) ULLONG_MAX);
173 }
174
175 int
176 main()
177 {
178 test1();
179 test2();
180 test3();
181
182 return 0;
183 }