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// RUN: %check_clang_tidy %s bugprone-not-null-terminated-result %t -- \
// RUN: -config="{CheckOptions: \
// RUN: [{key: bugprone-not-null-terminated-result.WantToUseSafeFunctions, \
// RUN: value: 1}]}" \
// RUN: -- -std=c11
// It is not defined therefore the safe functions are unavailable.
// #define __STDC_LIB_EXT1__ 1
#define __STDC_WANT_LIB_EXT1__ 1
typedef unsigned int size_t;
typedef int errno_t;
size_t strlen(const char *);
void *malloc(size_t);
char *strcpy(char *, const char *);
void *memcpy(void *, const void *, size_t);
//===----------------------------------------------------------------------===//
// memcpy() - destination array tests
//===----------------------------------------------------------------------===//
void bad_memcpy_not_just_char_dest(const char *src) {
unsigned char dest00[13];
memcpy(dest00, src, strlen(src));
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: the result from calling 'memcpy' is not null-terminated [bugprone-not-null-terminated-result]
// CHECK-FIXES: memcpy(dest00, src, strlen(src) + 1);
}
void good_memcpy_not_just_char_dest(const char *src) {
unsigned char dst00[13];
memcpy(dst00, src, strlen(src) + 1);
}
void bad_memcpy_known_dest(const char *src) {
char dest01[13];
memcpy(dest01, src, strlen(src));
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: the result from calling 'memcpy' is not null-terminated [bugprone-not-null-terminated-result]
// CHECK-FIXES: strcpy(dest01, src);
}
void good_memcpy_known_dest(const char *src) {
char dst01[13];
strcpy(dst01, src);
}
//===----------------------------------------------------------------------===//
// memcpy() - length tests
//===----------------------------------------------------------------------===//
void bad_memcpy_full_source_length(const char *src) {
char dest20[13];
memcpy(dest20, src, strlen(src));
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: the result from calling 'memcpy' is not null-terminated [bugprone-not-null-terminated-result]
// CHECK-FIXES: strcpy(dest20, src);
}
void good_memcpy_full_source_length(const char *src) {
char dst20[13];
strcpy(dst20, src);
}
void bad_memcpy_partial_source_length(const char *src) {
char dest21[13];
memcpy(dest21, src, strlen(src) - 1);
// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: the result from calling 'memcpy' is not null-terminated [bugprone-not-null-terminated-result]
// CHECK-FIXES: strncpy(dest21, src, strlen(src) - 1);
// CHECK-FIXES-NEXT: dest21[strlen(src) - 1] = '\0';
}
void good_memcpy_partial_source_length(const char *src) {
char dst21[13];
strncpy(dst21, src, strlen(src) - 1);
dst21[strlen(src) - 1] = '\0';
}
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