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c906108c SS |
1 | /* varargs.c - |
2 | * (Added as part of fix for bug 15306 - "call" to varargs functions fails) | |
3 | * This program is intended to let me try out "call" to varargs functions | |
4 | * with varying numbers of declared args and various argument types. | |
5 | * - RT 9/27/95 | |
6 | */ | |
7 | ||
8 | #include <stdio.h> | |
9 | #include <stdarg.h> | |
10 | ||
11 | int find_max1(int, ...); | |
12 | int find_max2(int, int, ...); | |
13 | double find_max_double(int, double, ...); | |
14 | ||
15 | char ch; | |
16 | unsigned char uc; | |
17 | short s; | |
18 | unsigned short us; | |
19 | int a,b,c,d; | |
20 | int max_val; | |
085dd6e6 | 21 | long long ll; |
c906108c SS |
22 | float fa,fb,fc,fd; |
23 | double da,db,dc,dd; | |
24 | double dmax_val; | |
25 | ||
6680506e YQ |
26 | #ifdef TEST_COMPLEX |
27 | extern float crealf (float _Complex); | |
28 | extern double creal (double _Complex); | |
29 | extern long double creall (long double _Complex); | |
30 | ||
31 | float _Complex fc1 = 1.0F + 1.0iF; | |
32 | float _Complex fc2 = 2.0F + 2.0iF; | |
33 | float _Complex fc3 = 3.0F + 3.0iF; | |
34 | float _Complex fc4 = 4.0F + 4.0iF; | |
35 | ||
36 | double _Complex dc1 = 1.0 + 1.0i; | |
37 | double _Complex dc2 = 2.0 + 2.0i; | |
38 | double _Complex dc3 = 3.0 + 3.0i; | |
39 | double _Complex dc4 = 4.0 + 4.0i; | |
40 | ||
41 | long double _Complex ldc1 = 1.0L + 1.0Li; | |
42 | long double _Complex ldc2 = 2.0L + 2.0Li; | |
43 | long double _Complex ldc3 = 3.0L + 3.0Li; | |
44 | long double _Complex ldc4 = 4.0L + 4.0Li; | |
45 | ||
46 | #endif | |
47 | ||
085dd6e6 | 48 | int main() { |
c906108c SS |
49 | c = -1; |
50 | uc = 1; | |
51 | s = -2; | |
52 | us = 2; | |
53 | a = 1; | |
54 | b = 60; | |
55 | max_val = find_max1(1, 60); | |
56 | max_val = find_max1(a, b); | |
57 | a = 3; | |
58 | b = 1; | |
59 | c = 4; | |
60 | d = 2; | |
61 | max_val = find_max1(3, 1, 4, 2); | |
62 | max_val = find_max2(a, b, c, d); | |
63 | da = 3.0; | |
64 | db = 1.0; | |
65 | dc = 4.0; | |
66 | dd = 2.0; | |
67 | dmax_val = find_max_double(3, 1.0, 4.0, 2.0); | |
68 | dmax_val = find_max_double(a, db, dc, dd); | |
085dd6e6 JM |
69 | |
70 | return 0; | |
c906108c SS |
71 | } |
72 | ||
73 | /* Integer varargs, 1 declared arg */ | |
74 | ||
75 | int find_max1(int num_vals, ...) { | |
76 | int max_val = 0; | |
77 | int x; | |
78 | int i; | |
79 | va_list argp; | |
80 | va_start(argp, num_vals); | |
81 | printf("find_max(%d,", num_vals); | |
82 | for (i = 0; i < num_vals; i++) { | |
83 | x = va_arg(argp, int); | |
84 | if (max_val < x) max_val = x; | |
85 | if (i < num_vals - 1) | |
86 | printf(" %d,", x); | |
87 | else | |
88 | printf(" %d)", x); | |
89 | } | |
90 | printf(" returns %d\n", max_val); | |
91 | return max_val; | |
92 | } | |
93 | ||
94 | /* Integer varargs, 2 declared args */ | |
95 | ||
96 | int find_max2(int num_vals, int first_val, ...) { | |
97 | int max_val = 0; | |
98 | int x; | |
99 | int i; | |
100 | va_list argp; | |
101 | va_start(argp, first_val); | |
102 | x = first_val; | |
103 | if (max_val < x) max_val = x; | |
104 | printf("find_max(%d, %d", num_vals, first_val); | |
105 | for (i = 1; i < num_vals; i++) { | |
106 | x = va_arg(argp, int); | |
107 | if (max_val < x) max_val = x; | |
108 | printf(", %d", x); | |
109 | } | |
110 | printf(") returns %d\n", max_val); | |
111 | return max_val; | |
112 | } | |
113 | ||
114 | /* Double-float varargs, 2 declared args */ | |
115 | ||
116 | double find_max_double(int num_vals, double first_val, ...) { | |
117 | double max_val = 0; | |
118 | double x; | |
119 | int i; | |
120 | va_list argp; | |
121 | va_start(argp, first_val); | |
122 | x = first_val; | |
123 | if (max_val < x) max_val = x; | |
d8f92b1f | 124 | printf("find_max(%d, %f", num_vals, first_val); |
c906108c SS |
125 | for (i = 1; i < num_vals; i++) { |
126 | x = va_arg(argp, double); | |
127 | if (max_val < x) max_val = x; | |
128 | printf(", %f", x); | |
129 | } | |
130 | printf(") returns %f\n", max_val); | |
131 | return max_val; | |
132 | } | |
133 | ||
6680506e YQ |
134 | |
135 | #ifdef TEST_COMPLEX | |
136 | float _Complex | |
137 | find_max_float_real (int num_vals, ...) | |
138 | { | |
139 | float _Complex max = 0.0F + 0.0iF; | |
140 | float _Complex x; | |
141 | va_list argp; | |
142 | int i; | |
143 | ||
144 | va_start(argp, num_vals); | |
145 | for (i = 0; i < num_vals; i++) | |
146 | { | |
147 | x = va_arg (argp, float _Complex); | |
148 | if (crealf (max) < crealf (x)) max = x; | |
149 | } | |
150 | ||
151 | return max; | |
152 | } | |
153 | ||
154 | double _Complex | |
155 | find_max_double_real (int num_vals, ...) | |
156 | { | |
157 | double _Complex max = 0.0 + 0.0i; | |
158 | double _Complex x; | |
159 | va_list argp; | |
160 | int i; | |
161 | ||
162 | va_start(argp, num_vals); | |
163 | for (i = 0; i < num_vals; i++) | |
164 | { | |
165 | x = va_arg (argp, double _Complex); | |
166 | if (creal (max) < creal (x)) max = x; | |
167 | } | |
168 | ||
169 | return max; | |
170 | } | |
171 | ||
172 | long double _Complex | |
173 | find_max_long_double_real (int num_vals, ...) | |
174 | { | |
175 | long double _Complex max = 0.0L + 0.0iL; | |
176 | long double _Complex x; | |
177 | va_list argp; | |
178 | int i; | |
179 | ||
180 | va_start(argp, num_vals); | |
181 | for (i = 0; i < num_vals; i++) | |
182 | { | |
183 | x = va_arg (argp, long double _Complex); | |
184 | if (creall (max) < creal (x)) max = x; | |
185 | } | |
186 | ||
187 | return max; | |
188 | } | |
189 | ||
190 | ||
191 | #endif /* TEST_COMPLEX */ |