blob: b5c8f6da9b6103d1fa3935f6b8faa05334c20801 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
|
#include <stdlib.h>
extern "C" void __cxa_pure_virtual() {
printk("__cxa_pure_virtual\n");
abort();
}
extern "C" void* memcpy(void* dstptr, const void* srcptr, const size_t n) {
auto* dst = static_cast<uint8_t*>(dstptr);
const auto* src = static_cast<const uint8_t*>(srcptr);
for (size_t i = 0; i < n; ++i) dst[i] = src[i];
return dstptr;
}
extern "C" void* memset(void* bufptr, const int value, const size_t n) {
auto* buf = static_cast<uint8_t*>(bufptr);
for (size_t i = 0; i < n; ++i) buf[i] = static_cast<uint8_t>(value);
return bufptr;
}
extern "C" void* memmove(void* dstptr, const void* srcptr, const size_t n) {
auto* dst = static_cast<uint8_t*>(dstptr);
const auto* src = static_cast<const uint8_t*>(srcptr);
if (dst < src) {
for (size_t i = 0; i < n; ++i) dst[i] = src[i];
} else {
for (size_t i = n; i != 0; i--) dst[i - 1] = src[i - 1];
}
return dstptr;
}
extern "C" int memcmp(const void* aptr, const void* bptr, const size_t n) {
const auto* a = static_cast<const uint8_t*>(aptr);
const auto* b = static_cast<const uint8_t*>(bptr);
for (size_t i = 0; i < n; ++i) {
if (a[i] < b[i])
return -1;
else if (b[i] < a[i])
return 1;
}
return 0;
}
|
