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/* Test for format attributes: test bad uses of __attribute__.  */

/* Origin: Joseph Myers <jsm28@cam.ac.uk> */

/* { dg-do compile } */

/* { dg-options "-std=gnu99 -Wformat" } */

#include "format.h"

/* Proper uses of the attributes.  */

extern void fa0 (const char *, ...) __attribute__((format(printf, 1, 2)));

extern void fa1 (char *, ...) __attribute__((format(printf, 1, 2)));

extern char *fa2 (const char *) __attribute__((format_arg(1)));

extern char *fa3 (char *) __attribute__((format_arg(1)));

/* Uses with too few or too many arguments.  */

extern void fb0 (const char *, ...) __attribute__((format)); /* { dg-error "wrong number of arguments" "bad format" } */

extern void fb1 (const char *, ...) __attribute__((format())); /* { dg-error "wrong number of arguments" "bad format" } */

extern void fb2 (const char *, ...) __attribute__((format(printf))); /* { dg-error "wrong number of arguments" "bad format" } */

extern void fb3 (const char *, ...) __attribute__((format(printf, 1))); /* { dg-error "wrong number of arguments" "bad format" } */

extern void fb4 (const char *, ...) __attribute__((format(printf, 1, 2, 3))); /* { dg-error "wrong number of arguments" "bad format" } */

extern void fc1 (const char *) __attribute__((format_arg)); /* { dg-error "wrong number of arguments" "bad format_arg" } */

extern void fc2 (const char *) __attribute__((format_arg())); /* { dg-error "wrong number of arguments" "bad format_arg" } */

extern void fc3 (const char *) __attribute__((format_arg(1, 2))); /* { dg-error "wrong number of arguments" "bad format_arg" } */

/* These attributes presently only apply to declarations, not to types.

   Eventually, they should be usable with declarators for function types

   anywhere, but still not with structure/union/enum types.  */

struct s0 { int i; } __attribute__((format(printf, 1, 2))); /* { dg-error "does not apply|only applies" "format on struct" } */

union u0 { int i; } __attribute__((format(printf, 1, 2))); /* { dg-error "does not apply|only applies" "format on union" } */

enum e0 { E0V0 } __attribute__((format(printf, 1, 2))); /* { dg-error "does not apply|only applies" "format on enum" } */

struct s1 { int i; } __attribute__((format_arg(1))); /* { dg-error "does not apply|only applies" "format_arg on struct" } */

union u1 { int i; } __attribute__((format_arg(1))); /* { dg-error "does not apply|only applies" "format_arg on union" } */

enum e1 { E1V0 } __attribute__((format_arg(1))); /* { dg-error "does not apply|only applies" "format_arg on enum" } */

/* The format type must be an identifier, one of those recognized.  */

extern void fe0 (const char *, ...) __attribute__((format(12345, 1, 2))); /* { dg-error "format specifier" "non-id format" } */

extern void fe1 (const char *, ...) __attribute__((format(nosuch, 1, 2))); /* { dg-warning "format function type" "unknown format" } */

/* Both the numbers must be integer constant expressions.  */

extern void ff0 (const char *, ...) __attribute__((format(printf, 3-2, (long long)(10/5))));

int foo;

extern void ff1 (const char *, ...) __attribute__((format(printf, foo, 10/5))); /* { dg-error "invalid operand" "bad number" } */

extern void ff2 (const char *, ...) __attribute__((format(printf, 3-2, foo))); /* { dg-error "invalid operand" "bad number" } */

extern char *ff3 (const char *) __attribute__((format_arg(3-2)));

extern char *ff4 (const char *) __attribute__((format_arg(foo))); /* { dg-error "invalid operand" "bad format_arg number" } */

/* The format string argument must precede the arguments to be formatted.

   This includes if no parameter types are specified (which is not valid ISO

   C for variadic functions).  */

extern void fg0 () __attribute__((format(printf, 1, 2)));

extern void fg1 () __attribute__((format(printf, 1, 0)));

extern void fg2 () __attribute__((format(printf, 1, 1))); /* { dg-error "follows" "bad number order" } */

extern void fg3 () __attribute__((format(printf, 2, 1))); /* { dg-error "follows" "bad number order" } */

/* The format string argument must be a string type, and the arguments to

   be formatted must be the "...".  */

extern void fh0 (int, ...) __attribute__((format(printf, 1, 2))); /* { dg-error "not a string" "format int string" } */

extern void fh1 (signed char *, ...) __attribute__((format(printf, 1, 2))); /* { dg-error "not a string" "signed char string" } */

extern void fh2 (unsigned char *, ...) __attribute__((format(printf, 1, 2))); /* { dg-error "not a string" "unsigned char string" } */

extern void fh3 (const char *, ...) __attribute__((format(printf, 1, 3))); /* { dg-error "is not" "not ..." } */

extern void fh4 (const char *, int, ...) __attribute__((format(printf, 1, 2))); /* { dg-error "is not" "not ..." } */

/* format_arg formats must take and return a string.  */

extern char *fi0 (int) __attribute__((format_arg(1))); /* { dg-error "not a string" "format_arg int string" } */

extern char *fi1 (signed char *) __attribute__((format_arg(1))); /* { dg-error "not a string" "format_arg signed char string" } */

extern char *fi2 (unsigned char *) __attribute__((format_arg(1))); /* { dg-error "not a string" "format_arg unsigned char string" } */

extern int fi3 (const char *) __attribute__((format_arg(1))); /* { dg-error "not return string" "format_arg ret int string" } */

extern signed char *fi4 (const char *) __attribute__((format_arg(1))); /* { dg-error "not return string" "format_arg ret signed char string" } */

extern unsigned char *fi5 (const char *) __attribute__((format_arg(1))); /* { dg-error "not return string" "format_arg ret unsigned char string" } */