clang/test/Sema/format-strings-int-typedefs.c

   1 // RUN: %clang_cc1 -triple i386-apple-darwin9 -fsyntax-only -verify %s
   2
   3 int printf(char const *, ...);
   4 int scanf(char const *, ...);
   5
   6 void test(void) {
   7   printf("%jd", 42.0); // expected-warning {{format specifies type 'intmax_t' (aka 'long long')}}
   8   printf("%ju", 42.0); // expected-warning {{format specifies type 'uintmax_t' (aka 'unsigned long long')}}
   9   printf("%zu", 42.0); // expected-warning {{format specifies type 'size_t' (aka 'unsigned long')}}
  10   printf("%td", 42.0); // expected-warning {{format specifies type 'ptrdiff_t' (aka 'int')}}
  11   printf("%lc", 42.0); // expected-warning {{format specifies type 'wint_t' (aka 'int')}}
  12   printf("%ls", 42.0); // expected-warning {{format specifies type 'wchar_t *' (aka 'int *')}}
  13   printf("%S", 42.0);  // expected-warning {{format specifies type 'wchar_t *' (aka 'int *')}}
  14   printf("%C", 42.0);  // expected-warning {{format specifies type 'wchar_t' (aka 'int')}}
  15
  16   scanf("%jd", 0); // expected-warning {{format specifies type 'intmax_t *' (aka 'long long *')}}
  17   scanf("%ju", 0); // expected-warning {{format specifies type 'uintmax_t *' (aka 'unsigned long long *')}}
  18   scanf("%zu", 0); // expected-warning {{format specifies type 'size_t *' (aka 'unsigned long *')}}
  19   scanf("%td", 0); // expected-warning {{format specifies type 'ptrdiff_t *' (aka 'int *')}}
  20   scanf("%lc", 0); // expected-warning {{format specifies type 'wchar_t *' (aka 'int *')}}
  21   scanf("%ls", 0); // expected-warning {{format specifies type 'wchar_t *' (aka 'int *')}}
  22   scanf("%S",  0);  // expected-warning {{format specifies type 'wchar_t *' (aka 'int *')}}
  23   scanf("%C",  0);  // expected-warning {{format specifies type 'wchar_t *' (aka 'int *')}}
  24
  25
  26   // typedef size_t et al. to something crazy.
  27   typedef void *size_t;
  28   typedef void *intmax_t;
  29   typedef void *uintmax_t;
  30   typedef void *ptrdiff_t;
  31
  32   // The warning still fires, because it checks the underlying type.
  33   printf("%jd", (intmax_t)42); // expected-warning {{format specifies type 'intmax_t' (aka 'long long') but the argument has type 'intmax_t' (aka 'void *')}}
  34   printf("%ju", (uintmax_t)42); // expected-warning {{format specifies type 'uintmax_t' (aka 'unsigned long long') but the argument has type 'uintmax_t' (aka 'void *')}}
  35   printf("%zu", (size_t)42); // expected-warning {{format specifies type 'size_t' (aka 'unsigned long') but the argument has type 'size_t' (aka 'void *')}}
  36   printf("%td", (ptrdiff_t)42); // expected-warning {{format specifies type 'ptrdiff_t' (aka 'int') but the argument has type 'ptrdiff_t' (aka 'void *')}}
  37 }