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#include <stdio.h>
#include <sys/mman.h>
#include <emscripten.h>
#include <string.h>
#include <assert.h>
int main() {
printf("*\n");
FILE *f = fopen("data.dat", "r");
char *m;
m = (char*)mmap(NULL, 9000, PROT_READ, MAP_PRIVATE, fileno(f), 0);
for (int i = 0; i < 20; i++) putchar(m[i]);
assert(!strncmp(m, "data from the file .", 20));
munmap(m, 9000);
printf("\n");
m = (char*)mmap(NULL, 9000, PROT_READ, MAP_PRIVATE, fileno(f), 5);
for (int i = 0; i < 20; i++) putchar(m[i]);
assert(!strncmp(m, "from the file ......", 20));
munmap(m, 9000);
printf("\n*\n");
#ifdef REPORT_RESULT
int result = 1;
REPORT_RESULT();
#endif
return 0;
}
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