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/* varargs.c -
* (Added as part of fix for bug 15306 - "call" to varargs functions fails)
* This program is intended to let me try out "call" to varargs functions
* with varying numbers of declared args and various argument types.
* - RT 9/27/95
*/
#include <stdio.h>
#include <stdarg.h>
int find_max1(int, ...);
int find_max2(int, int, ...);
double find_max_double(int, double, ...);
char ch;
unsigned char uc;
short s;
unsigned short us;
int a,b,c,d;
int max_val;
long long ll;
float fa,fb,fc,fd;
double da,db,dc,dd;
double dmax_val;
#ifdef TEST_COMPLEX
extern float crealf (float _Complex);
extern double creal (double _Complex);
extern long double creall (long double _Complex);
float _Complex fc1 = 1.0F + 1.0iF;
float _Complex fc2 = 2.0F + 2.0iF;
float _Complex fc3 = 3.0F + 3.0iF;
float _Complex fc4 = 4.0F + 4.0iF;
double _Complex dc1 = 1.0 + 1.0i;
double _Complex dc2 = 2.0 + 2.0i;
double _Complex dc3 = 3.0 + 3.0i;
double _Complex dc4 = 4.0 + 4.0i;
long double _Complex ldc1 = 1.0L + 1.0Li;
long double _Complex ldc2 = 2.0L + 2.0Li;
long double _Complex ldc3 = 3.0L + 3.0Li;
long double _Complex ldc4 = 4.0L + 4.0Li;
#endif
int main() {
c = -1;
uc = 1;
s = -2;
us = 2;
a = 1;
b = 60;
max_val = find_max1(1, 60);
max_val = find_max1(a, b);
a = 3;
b = 1;
c = 4;
d = 2;
max_val = find_max1(3, 1, 4, 2);
max_val = find_max2(a, b, c, d);
da = 3.0;
db = 1.0;
dc = 4.0;
dd = 2.0;
dmax_val = find_max_double(3, 1.0, 4.0, 2.0);
dmax_val = find_max_double(a, db, dc, dd);
return 0;
}
/* Integer varargs, 1 declared arg */
int find_max1(int num_vals, ...) {
int max_val = 0;
int x;
int i;
va_list argp;
va_start(argp, num_vals);
printf("find_max(%d,", num_vals);
for (i = 0; i < num_vals; i++) {
x = va_arg(argp, int);
if (max_val < x) max_val = x;
if (i < num_vals - 1)
printf(" %d,", x);
else
printf(" %d)", x);
}
printf(" returns %d\n", max_val);
return max_val;
}
/* Integer varargs, 2 declared args */
int find_max2(int num_vals, int first_val, ...) {
int max_val = 0;
int x;
int i;
va_list argp;
va_start(argp, first_val);
x = first_val;
if (max_val < x) max_val = x;
printf("find_max(%d, %d", num_vals, first_val);
for (i = 1; i < num_vals; i++) {
x = va_arg(argp, int);
if (max_val < x) max_val = x;
printf(", %d", x);
}
printf(") returns %d\n", max_val);
return max_val;
}
/* Double-float varargs, 2 declared args */
double find_max_double(int num_vals, double first_val, ...) {
double max_val = 0;
double x;
int i;
va_list argp;
va_start(argp, first_val);
x = first_val;
if (max_val < x) max_val = x;
printf("find_max(%d, %f", num_vals, first_val);
for (i = 1; i < num_vals; i++) {
x = va_arg(argp, double);
if (max_val < x) max_val = x;
printf(", %f", x);
}
printf(") returns %f\n", max_val);
return max_val;
}
#ifdef TEST_COMPLEX
float _Complex
find_max_float_real (int num_vals, ...)
{
float _Complex max = 0.0F + 0.0iF;
float _Complex x;
va_list argp;
int i;
va_start(argp, num_vals);
for (i = 0; i < num_vals; i++)
{
x = va_arg (argp, float _Complex);
if (crealf (max) < crealf (x)) max = x;
}
return max;
}
double _Complex
find_max_double_real (int num_vals, ...)
{
double _Complex max = 0.0 + 0.0i;
double _Complex x;
va_list argp;
int i;
va_start(argp, num_vals);
for (i = 0; i < num_vals; i++)
{
x = va_arg (argp, double _Complex);
if (creal (max) < creal (x)) max = x;
}
return max;
}
long double _Complex
find_max_long_double_real (int num_vals, ...)
{
long double _Complex max = 0.0L + 0.0iL;
long double _Complex x;
va_list argp;
int i;
va_start(argp, num_vals);
for (i = 0; i < num_vals; i++)
{
x = va_arg (argp, long double _Complex);
if (creall (max) < creal (x)) max = x;
}
return max;
}
#endif /* TEST_COMPLEX */
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