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tp1trace.c
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tp1trace.c
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////////////////////////////////////////////////////////////////
// //
// DO NOT EDIT THIS FILE -- WRITE YOUR FUNCTIONS IN tp1.c //
// //
////////////////////////////////////////////////////////////////
// Reads the contents of "tp1.c", ignoring any main() function.
#define main no__main
#include "tp1.c"
#undef main
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <time.h>
#include <string.h>
#include <errno.h>
#include <stdint.h>
struct xx_ranctx { uint32_t a; uint32_t b; uint32_t c; uint32_t d; } xx_ranc;
uint32_t xx_ranval()
{
#define rot(x, k) (((x) << (k)) | ((x) >> (32 - (k))))
uint32_t e = xx_ranc.a - rot(xx_ranc.b, 27);
xx_ranc.a = xx_ranc.b ^ rot(xx_ranc.c, 17);
xx_ranc.b = xx_ranc.c + xx_ranc.d;
xx_ranc.c = xx_ranc.d + e;
xx_ranc.d = e + xx_ranc.a;
return xx_ranc.d;
}
void xx_raninit(uint32_t seed)
{
xx_ranc.a = 0xf1ea5eed, xx_ranc.b = xx_ranc.c = xx_ranc.d = seed;
for (uint32_t i = 0; i < 20; ++i)
(void) xx_ranval();
}
FILE* xx_trace;
const char* xx_trace_name;
void xx_trace_init(const char* name)
{
xx_trace_name = getenv("OUTPUT");
if (!xx_trace_name)
{
static char tmp[30];
strncpy(tmp, name, 30);
strncat(tmp, ".trace", 30);
xx_trace_name = tmp;
}
xx_trace = fopen(xx_trace_name, "w+");
if (!xx_trace)
{
fprintf(stderr, "cannot open '%s' for writing: %s\n",
xx_trace_name, strerror(errno));
exit(2);
}
time_t rawtime = time(NULL);
struct tm *timeinfo = gmtime(&rawtime);
char buffer[20];
strftime(buffer, 80, "%F %T%n", timeinfo);
int u = getuid();
int r = rawtime & 0xffffff;
fprintf(xx_trace, "%s\n%d\n%d\n", name, u, r);
fputs(buffer, xx_trace);
u ^= r;
const char* s = getenv("SEED");
if (s)
u = atoi(s);
xx_raninit(u);
}
void xx_trace_done()
{
fclose(xx_trace);
printf("please submit '%s'\n", xx_trace_name);
}
unsigned int xx_cmp_count = 0;
int xx_cmp(int a, int b)
{
++xx_cmp_count;
if (((a&1) == 0) && ((b&1) == 1))
return -1;
if (((a&1) == 1) && ((b&1) == 0))
return 1;
if (a < b)
return -1;
return a > b;
}
int main()
{
#if Q == 1
xx_trace_init("tp1q1");
for (int i = 10; i > 0; --i)
{
int r = (int) xx_ranval();
fprintf(xx_trace, "int_width(%d) = %d\n", r, int_width(r));
}
int a[] =
{ -2147483647 - 1, -100000, -99999, -10000, -9999, -1000, -999, -100,
-99, -10, -9, -1, 0, 1, 9, 10, 99, 100, 999, 1000, 9999, 10000,
99999, 100000, 999999999, 1000000000,
2147483647 };
unsigned asize = sizeof(a) / sizeof(*a);
for (unsigned i = 0; i < asize; ++i)
fprintf(xx_trace, "int_width(%d) = %d\n", a[i], int_width(a[i]));
xx_trace_done();
#elif Q == 2
xx_trace_init("tp1q2");
int a[11];
for (int i = 0; i < 11; ++i)
{
int w = xx_ranval() % 31;
if (i < 5 && w < 20)
w += 10;
a[i] = ((int) xx_ranval()) >> w;
}
fprintf(xx_trace, "a[] = { %d", a[0]);
for (int i = 1; i < 11; ++i)
fprintf(xx_trace, ", %d", a[i]);
fprintf(xx_trace, " }\n");
for (int i = 1; i < 11; ++i)
fprintf(xx_trace, "ints_width(a, %d) == %d\n", i, ints_width(a, i));
xx_trace_done();
#elif Q == 3
xx_trace_init("tp1q3");
int a[101];
for (unsigned i = 0; i < 101; ++i)
{
int w = xx_ranval() % 31;
a[i] = ((int) xx_ranval()) >> w;
}
print_int_array(xx_trace, a, 1);
print_int_array(xx_trace, a, 4);
print_int_array(xx_trace, a, 10);
print_int_array(xx_trace, a, 20);
print_int_array(xx_trace, a, 100);
print_int_array(xx_trace, a, 101);
xx_trace_done();
#elif Q == 5
xx_trace_init("tp1q5");
int a[100];
for (unsigned i = 0; i < 100; ++i)
{
int w = xx_ranval() % 31;
a[i] = ((int) xx_ranval()) >> w;
}
print_int_array(xx_trace, a, 100);
insert_sort_cmp(a, 100, xx_cmp);
fprintf(xx_trace, "%u comparisons\n", xx_cmp_count);
print_int_array(xx_trace, a, 100);
xx_trace_done();
#else
puts("Compile with -DQ=n, where n is the question number.");
#endif
return 0;
}