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package runtime
when ODIN_NO_CRT && ODIN_OS == .Windows {
foreign import lib "system:NtDll.lib"
@(private="file")
@(default_calling_convention="stdcall")
foreign lib {
RtlMoveMemory :: proc(dst, s: rawptr, length: int) ---
RtlFillMemory :: proc(dst: rawptr, length: int, fill: i32) ---
}
@(link_name="memset", linkage="strong", require)
memset :: proc "c" (ptr: rawptr, val: i32, len: int) -> rawptr {
RtlFillMemory(ptr, len, val)
return ptr
}
@(link_name="memmove", linkage="strong", require)
memmove :: proc "c" (dst, src: rawptr, len: int) -> rawptr {
RtlMoveMemory(dst, src, len)
return dst
}
@(link_name="memcpy", linkage="strong", require)
memcpy :: proc "c" (dst, src: rawptr, len: int) -> rawptr {
RtlMoveMemory(dst, src, len)
return dst
}
} else when ODIN_NO_CRT || (ODIN_ARCH == .wasm32 || ODIN_ARCH == .wasm64p32) {
@(link_name="memset", linkage="strong", require)
memset :: proc "c" (ptr: rawptr, val: i32, len: int) -> rawptr {
if ptr != nil && len != 0 {
b := byte(val)
p := ([^]byte)(ptr)
for i in 0..<len {
p[i] = b
}
}
return ptr
}
@(link_name="memmove", linkage="strong", require)
memmove :: proc "c" (dst, src: rawptr, len: int) -> rawptr {
d, s := ([^]byte)(dst), ([^]byte)(src)
if d == s || len == 0 {
return dst
}
if d > s && uintptr(d)-uintptr(s) < uintptr(len) {
for i := len-1; i >= 0; i -= 1 {
d[i] = s[i]
}
return dst
}
if s > d && uintptr(s)-uintptr(d) < uintptr(len) {
for i := 0; i < len; i += 1 {
d[i] = s[i]
}
return dst
}
return memcpy(dst, src, len)
}
@(link_name="memcpy", linkage="strong", require)
memcpy :: proc "c" (dst, src: rawptr, len: int) -> rawptr {
d, s := ([^]byte)(dst), ([^]byte)(src)
if d != s {
for i := 0; i < len; i += 1 {
d[i] = s[i]
}
}
return d
}
} else {
memset :: proc "c" (ptr: rawptr, val: i32, len: int) -> rawptr {
if ptr != nil && len != 0 {
b := byte(val)
p := ([^]byte)(ptr)
for i in 0..<len {
p[i] = b
}
}
return ptr
}
}
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