forked from OSchip/llvm-project
80 lines
2.6 KiB
C
80 lines
2.6 KiB
C
// RUN: %check_clang_tidy %s misc-suspicious-string-compare %t -- \
|
|
// RUN: -config='{CheckOptions: \
|
|
// RUN: [{key: misc-suspicious-string-compare.WarnOnImplicitComparison, value: 1}, \
|
|
// RUN: {key: misc-suspicious-string-compare.WarnOnLogicalNotComparison, value: 1}]}' \
|
|
// RUN: -- -std=c99
|
|
|
|
static const char A[] = "abc";
|
|
|
|
int strcmp(const char *, const char *);
|
|
|
|
int test_warning_patterns() {
|
|
if (strcmp(A, "a"))
|
|
return 0;
|
|
// CHECK-MESSAGES: [[@LINE-2]]:7: warning: function 'strcmp' is called without explicitly comparing result [misc-suspicious-string-compare]
|
|
// CHECK-FIXES: if (strcmp(A, "a") != 0)
|
|
|
|
if (strcmp(A, "a") != 0 ||
|
|
strcmp(A, "b"))
|
|
return 0;
|
|
// CHECK-MESSAGES: [[@LINE-2]]:7: warning: function 'strcmp' is called without explicitly comparing result
|
|
// CHECK-FIXES: strcmp(A, "b") != 0)
|
|
|
|
if (strcmp(A, "a") == 1)
|
|
return 0;
|
|
// CHECK-MESSAGES: [[@LINE-2]]:7: warning: function 'strcmp' is compared to a suspicious constant
|
|
|
|
if (strcmp(A, "a") == -1)
|
|
return 0;
|
|
// CHECK-MESSAGES: [[@LINE-2]]:7: warning: function 'strcmp' is compared to a suspicious constant
|
|
|
|
if (strcmp(A, "a") < '0')
|
|
return 0;
|
|
// CHECK-MESSAGES: [[@LINE-2]]:7: warning: function 'strcmp' is compared to a suspicious constant
|
|
|
|
if (strcmp(A, "a") < 0.)
|
|
return 0;
|
|
// CHECK-MESSAGES: [[@LINE-2]]:7: warning: function 'strcmp' has suspicious implicit cast
|
|
|
|
if (!strcmp(A, "a"))
|
|
return 0;
|
|
// CHECK-MESSAGES: [[@LINE-2]]:8: warning: function 'strcmp' is compared using logical not operator
|
|
// CHECK-FIXES: if (strcmp(A, "a") == 0)
|
|
}
|
|
|
|
void test_structure_patterns() {
|
|
if (strcmp(A, "a")) {}
|
|
// CHECK-MESSAGES: [[@LINE-1]]:7: warning: function 'strcmp' is called without explicitly comparing result
|
|
// CHECK-FIXES: if (strcmp(A, "a") != 0) {}
|
|
|
|
while (strcmp(A, "a")) {}
|
|
// CHECK-MESSAGES: [[@LINE-1]]:10: warning: function 'strcmp' is called without explicitly comparing result
|
|
// CHECK-FIXES: while (strcmp(A, "a") != 0) {}
|
|
|
|
for (;strcmp(A, "a");) {}
|
|
// CHECK-MESSAGES: [[@LINE-1]]:9: warning: function 'strcmp' is called without explicitly comparing result
|
|
// CHECK-FIXES: for (;strcmp(A, "a") != 0;) {}
|
|
}
|
|
|
|
int test_valid_patterns() {
|
|
// The following cases are valid.
|
|
if (strcmp(A, "a") < 0) return 0;
|
|
if (strcmp(A, "a") == 0) return 0;
|
|
if (strcmp(A, "a") <= 0) return 0;
|
|
if (strcmp(A, "a") == strcmp(A, "b")) return 0;
|
|
return 1;
|
|
}
|
|
|
|
int wrapper(const char* a, const char* b) {
|
|
return strcmp(a, b);
|
|
}
|
|
|
|
int assignment_wrapper(const char* a, const char* b) {
|
|
int cmp = strcmp(a, b);
|
|
return cmp;
|
|
}
|
|
|
|
int condexpr_wrapper(const char* a, const char* b) {
|
|
return (a < b) ? strcmp(a, b) : strcmp(b, a);
|
|
}
|