1//RUN: %clang_cc1 -fsyntax-only -verify %s
2
3#include <stdarg.h>
4
5void a(const char *a, ...) __attribute__((format(printf, 1,2))); // no-error
6void b(const char *a, ...) __attribute__((format(printf, 1,1))); // expected-error {{'format' attribute parameter 3 is out of bounds}}
7void c(const char *a, ...) __attribute__((format(printf, 0,2))); // expected-error {{'format' attribute parameter 2 is out of bounds}}
8void d(const char *a, int c) __attribute__((format(printf, 1,2))); // expected-error {{format attribute requires variadic function}}
9void e(char *str, int c, ...) __attribute__((format(printf, 2,3))); // expected-error {{format argument not a string type}}
10
11typedef const char* xpto;
12void f(xpto c, va_list list) __attribute__((format(printf, 1, 0))); // no-error
13void g(xpto c) __attribute__((format(printf, 1, 0))); // no-error
14
15void y(char *str) __attribute__((format(strftime, 1,0))); // no-error
16void z(char *str, int c, ...) __attribute__((format(strftime, 1,2))); // expected-error {{strftime format attribute requires 3rd parameter to be 0}}
17
18int (*f_ptr)(char*,...) __attribute__((format(printf, 1,2))); // no-error
19int (*f2_ptr)(double,...) __attribute__((format(printf, 1, 2))); // expected-error {{format argument not a string type}}
20
21struct _mystruct {
22  int (*printf)(const char *format, ...) __attribute__((__format__(printf, 1, 2))); // no-error
23  int (*printf2)(double format, ...) __attribute__((__format__(printf, 1, 2))); // expected-error {{format argument not a string type}}
24};
25
26typedef int (*f3_ptr)(char*,...) __attribute__((format(printf,1,0))); // no-error
27
28// <rdar://problem/6623513>
29int rdar6623513(void *, const char*, const char*, ...)
30  __attribute__ ((format (printf, 3, 0)));
31
32int rdar6623513_aux(int len, const char* s) {
33  rdar6623513(0, "hello", "%.*s", len, s);
34}
35
36
37
38// same as format(printf(...))...
39void a2(const char *a, ...)    __attribute__((format(printf0, 1,2))); // no-error
40void b2(const char *a, ...)    __attribute__((format(printf0, 1,1))); // expected-error {{'format' attribute parameter 3 is out of bounds}}
41void c2(const char *a, ...)    __attribute__((format(printf0, 0,2))); // expected-error {{'format' attribute parameter 2 is out of bounds}}
42void d2(const char *a, int c)  __attribute__((format(printf0, 1,2))); // expected-error {{format attribute requires variadic function}}
43void e2(char *str, int c, ...) __attribute__((format(printf0, 2,3))); // expected-error {{format argument not a string type}}
44
45// FreeBSD usage
46#define __printf0like(fmt,va) __attribute__((__format__(__printf0__,fmt,va)))
47void null(int i, const char *a, ...) __printf0like(2,0); // no-error
48void null(int i, const char *a, ...) { // expected-note{{passing argument to parameter 'a' here}}
49  if (a)
50    (void)0/* vprintf(...) would go here */;
51}
52
53void callnull(void){
54  null(0,        0); // no error
55  null(0, (char*)0); // no error
56  null(0, (void*)0); // no error
57  null(0,  (int*)0); // expected-warning {{incompatible pointer types}}
58}
59
60
61
62// PR4470
63int xx_vprintf(const char *, va_list);
64
65const char *foo(const char *format) __attribute__((format_arg(1)));
66
67void __attribute__((format(printf, 1, 0)))
68foo2(const char *fmt, va_list va) {
69  xx_vprintf(foo(fmt), va);
70}
71
72// PR6542
73extern void gcc_format (const char *, ...)
74  __attribute__ ((__format__(__gcc_diag__, 1, 2)));
75extern void gcc_cformat (const char *, ...)
76  __attribute__ ((__format__(__gcc_cdiag__, 1, 2)));
77extern void gcc_cxxformat (const char *, ...)
78  __attribute__ ((__format__(__gcc_cxxdiag__, 1, 2)));
79extern void gcc_tformat (const char *, ...)
80  __attribute__ ((__format__(__gcc_tdiag__, 1, 2)));
81
82const char *foo3(const char *format) __attribute__((format_arg("foo")));  // expected-error{{'format_arg' attribute requires parameter 1 to be an integer constant}}
83