# 1) allocate memory

a = malloc(12);

if (!is_resource(a) || !is_mem_resource(a)) exit(1);


# 2) check memory writability

a = malloc(42);
b = is_rw(a);

if (!b) exit(2);


# 3) free memory

a = malloc(42);
free(a);
b = msize(a);

if (b != 0) exit(3);


# 4) writability of freed resource

a = malloc(42);
free(a);
b = is_rw(a);

if (b) exit(4);


# 5) mputchar and mgetchar

a = malloc(1);
for (i = 0; i < 10; i++) {
  mputchar(a, i, i * 10);
}
ok = true;
for (i = 0; i < 10; i++) {
  ok = ok && (mgetchar(a, i) == i * 10);
}
b = mgetchar(a, 10);
c = msize(a);

if (!ok || !is_void(b) || c != 10) exit(5);


# 6) mputshort and mgetshort

a = malloc(1);
for (i = 0; i < 10; i++) {
  mputshort(a, i * 4, i * 10);
}
ok = true;
for (i = 0; i < 10; i++) {
  ok = ok && (mgetshort(a, i * 4) == i * 10);
}
b = mgetshort(a, 10 * 4);

if (!ok || !is_void(b)) exit(6);


# 7) mputint and mgetint

a = malloc(1);
for (i = 0; i < 10; i++) {
  mputint(a, i * 8, i * 10);
}
ok = true;
for (i = 0; i < 10; i++) {
  ok = ok && (mgetint(a, i * 8) == i * 10);
}
b = mgetshort(a, 10 * 8);

if (!ok || !is_void(b)) exit(7);


# 8) cnull

a = cnull();
b = msize(a);
c = is_rw(a);

if (b != 0 || c) exit(8);


# 9) cstring

a = cstring("foobar");
b = msize(a);
c = is_rw(a);

if (b != 7 || !c) exit(9);


# 10) mstring

a = cstring("foobar");
b = mstring(a, 0);
c = mstring(a, 3);

if (b != "foobar" || c != "bar") exit(10);


# 11) mputptr and mgetptr

a = malloc(1);
b = cstring("foobar");
mputptr(a, 0, b);
c = mgetptr(a, 0, false);
d = mstring(c, 0);

if (d != "foobar") exit(11);


# 12) calloc

a = calloc(10, 10);
ok = true;
for (i = 0; i < 100; i++) {
  ok = ok && (mgetchar(a, i) == 0);
}
b = msize(a);

if (!ok || b != 100) exit(12);


# 13) mputfloat and mgetfloat

a = malloc(1);
for (i = 0; i < 10; i++) {
  mputfloat(a, i * 16, i * 10.0);
}
ok = true;
for (i = 0; i < 10; i++) {
  ok = ok && (mgetfloat(a, i * 16) == i * 10.0);
}
b = mgetfloat(a, 10 * 16);

if (!ok || !is_void(b)) exit(13);


# 14) mputdouble and mgetdouble

a = malloc(1);
for (i = 0; i < 10; i++) {
  mputdouble(a, i * 16, i * 10.0);
}
ok = true;
for (i = 0; i < 10; i++) {
  ok = ok && (mgetdouble(a, i * 16) == i * 10.0);
}
b = mgetdouble(a, 10 * 16);

if (!ok || !is_void(b)) exit(13);


# 15) realloc

a = malloc(12);
for (i = 0; i < 12; i++) {
  mputchar(a, i, 42);
}
b = realloc(a, 6);
if (!b) exit(15);
for (i = 0; i < 6; i++) {
  if (mgetchar(a, i) != 42) exit(15);
}
for (; i < 12; i++) {
  if (mgetchar(a, i) != ()) exit(15);
}


# 16) memset

a = malloc(1);
b = memset(a, 0, 42, 10);
c = msize(a);
for (i = 0; i < 10; ++i) {
  if (mgetchar(a, i) != 42) exit(16);
}

if (!is_resource(a) || b != true || c != 10) exit(16);


# 17) memcpy

a = malloc(10);
memset(a, 0, 42, 10);
b = malloc(1);
c = memcpy(b, 10, a, 0, 10);
d = msize(b);
for (i = 0; i < 10; ++i) {
  if (mgetchar(b, i + 10) != 42) exit(17);
}

if (!is_resource(a) || !is_resource(b) || c != true || d != 20) exit(17);


# 18) memmove

a = malloc(10);
memset(a, 0, 42, 10);
b = malloc(1);
c = memmove(b, 10, a, 0, 10);
d = msize(b);
for (i = 0; i < 10; ++i) {
  if (mgetchar(b, i + 10) != 42) exit(17);
}

if (!is_resource(a) || !is_resource(b) || c != true || d != 20) exit(17);


# 19) memcmp with non-matching size

a = malloc(10);
b = malloc(1);
c = memcmp(a, 0, b, 0, 10);

if (!is_resource(a) || !is_resource(b) || c != ()) exit(19);


# 20) memcmp

a = malloc(10);
memset(a, 0, 42, 10);
b = malloc(10);
memset(b, 0, 43, 10);
c = memcmp(a, 0, b, 0, 10);

if (!is_resource(a) || !is_resource(b) || !is_int(c) || c >= 0) exit(20);


# 21) memchr

a = malloc(10);
memset(a, 0, 42, 9);
mputchar(a, 9, 43);
b = memchr(a, 0, 42, 10);
c = memchr(a, 1, 42, 9);
d = memchr(a, 0, 43, 10);
e = memchr(a, 0, 44, 10);

if (!is_resource(a) || b != 0 || c != 1 || d != 9 || e != ()) exit(21);


# 22) is_null

a = cnull();
b = malloc(10);
c = is_null(a);
d = is_null(b);

if (c != true || d != false) exit(22);


# 23) mputstring

a = malloc(1);
b = mputstring(a, 0, "foobar");
c = msize(a);

if (b != true || c != 6) exit(23);


# 24) mgetstring

a = malloc(1);
mputstring(a, 0, "foobar");
b = mgetstring(a, 3, 3);
d = mgetstring(a, 3, 4);

if (b != "bar" || d != ()) exit(24);


print("24 subtests ");