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#include <cstdio>
void bad() {
char x[100];
snprintf(x, sizeof(x), "bar"); // expected-error {{Use SprintfLiteral instead of snprintf when writing into a character array.}} expected-note {{This will prevent passing in the wrong size to snprintf accidentally.}}
snprintf(x, 100, "bar"); // expected-error {{Use SprintfLiteral instead of snprintf when writing into a character array.}} expected-note {{This will prevent passing in the wrong size to snprintf accidentally.}}
const int hundred = 100;
snprintf(x, hundred, "bar"); // expected-error {{Use SprintfLiteral instead of snprintf when writing into a character array.}} expected-note {{This will prevent passing in the wrong size to snprintf accidentally.}}
}
void ok() {
char x[100];
int y;
snprintf(x, sizeof(y), "foo");
snprintf(x, 50, "foo");
int nothundred = 100;
nothundred = 99;
snprintf(x, nothundred, "foo");
}
void vargs_bad(va_list args) {
char x[100];
vsnprintf(x, sizeof(x), "bar", args); // expected-error {{Use VsprintfLiteral instead of vsnprintf when writing into a character array.}} expected-note {{This will prevent passing in the wrong size to vsnprintf accidentally.}}
vsnprintf(x, 100, "bar", args); // expected-error {{Use VsprintfLiteral instead of vsnprintf when writing into a character array.}} expected-note {{This will prevent passing in the wrong size to vsnprintf accidentally.}}
const int hundred = 100;
vsnprintf(x, hundred, "bar", args); // expected-error {{Use VsprintfLiteral instead of vsnprintf when writing into a character array.}} expected-note {{This will prevent passing in the wrong size to vsnprintf accidentally.}}
}
void vargs_good(va_list args) {
char x[100];
int y;
vsnprintf(x, sizeof(y), "foo", args);
vsnprintf(x, 50, "foo", args);
int nothundred = 100;
nothundred = 99;
vsnprintf(x, nothundred, "foo", args);
}