You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
78 lines
1.2 KiB
78 lines
1.2 KiB
/*
|
|
* Copyright (c) 2017-present, Facebook, Inc.
|
|
*
|
|
* This source code is licensed under the MIT license found in the
|
|
* LICENSE file in the root directory of this source tree.
|
|
*/
|
|
|
|
#include <stdint.h>
|
|
|
|
void cast_Good() {
|
|
char arr[5];
|
|
*(int32_t*)(arr + 1) = 123;
|
|
}
|
|
|
|
void cast_Bad_FN() {
|
|
char arr[1];
|
|
*(int32_t*)arr = 123;
|
|
}
|
|
|
|
void cast2_Good_FP() {
|
|
int32_t arr[4];
|
|
*(((char*)arr) + 4) = 123;
|
|
}
|
|
|
|
void cast_unsigned_to_signed_Good() {
|
|
char arr[10];
|
|
uint32_t x = 15;
|
|
int32_t y = (int32_t)x;
|
|
if (y < 10) {
|
|
arr[y] = 0;
|
|
}
|
|
}
|
|
|
|
void cast_unsigned_to_signed_Bad_FN() {
|
|
char arr[10];
|
|
uint32_t x = 4294967295;
|
|
int32_t y = (int32_t)x; // y is -1.
|
|
if (y < 10) {
|
|
arr[y] = 0;
|
|
}
|
|
}
|
|
|
|
void cast_signed_to_unsigned_Good() {
|
|
char arr[10];
|
|
int32_t x = 15;
|
|
uint32_t y = (uint32_t)x;
|
|
if (y < 10) {
|
|
arr[y] = 0;
|
|
}
|
|
}
|
|
|
|
void cast_signed_to_unsigned_Bad_FN() {
|
|
char arr[10];
|
|
int32_t x = -1;
|
|
uint32_t y = (uint32_t)x;
|
|
if (y > 0) {
|
|
arr[y] = 0;
|
|
}
|
|
}
|
|
|
|
void cast_float_to_int_Good() {
|
|
char arr[10];
|
|
float x = 15.0;
|
|
int32_t y = (int32_t)x;
|
|
if (y < 10) {
|
|
arr[y] = 0;
|
|
}
|
|
}
|
|
|
|
void cast_float_to_int_Bad_FN() {
|
|
char arr[10];
|
|
float x = 15000000000.0;
|
|
int32_t y = (int32_t)x; // y is -2147483648.
|
|
if (y < 10) {
|
|
arr[y] = 0;
|
|
}
|
|
}
|