1 /* Test for format extensions beyond the C standard and X/Open standard.
2 Test for printf formats.
3 */
4 /* Origin: Joseph Myers <jsm28@cam.ac.uk> */
5 /* { dg-do compile } */
6 /* { dg-options "-std=gnu99 -Wformat" } */
7
8 #include "format.h"
9
10 void
11 foo (quad_t q, u_quad_t uq, quad_t *qn, size_t z, size_t *zn, long long int ll,
12 unsigned long long int ull, int i, unsigned int u, double d,
13 char *s, void *p, wchar_t *ls, wint_t lc, int *n, long int l)
14 {
15 /* As an extension, GCC allows the BSD length "q" for integer formats.
16 This is largely obsoleted in C99 by %j, %ll and PRId64.
17 */
18 printf ("%qd%qi%qo%qu%qx%qX%qn", q, q, uq, uq, uq, uq, qn);
19 printf ("%qf", d); /* { dg-warning "length" "bad use of %q" } */
20 printf ("%qF", d); /* { dg-warning "length" "bad use of %q" } */
21 printf ("%qe", d); /* { dg-warning "length" "bad use of %q" } */
22 printf ("%qE", d); /* { dg-warning "length" "bad use of %q" } */
23 printf ("%qg", d); /* { dg-warning "length" "bad use of %q" } */
24 printf ("%qG", d); /* { dg-warning "length" "bad use of %q" } */
25 printf ("%qa", d); /* { dg-warning "length" "bad use of %q" } */
26 printf ("%qA", d); /* { dg-warning "length" "bad use of %q" } */
27 printf ("%qc", i); /* { dg-warning "length" "bad use of %q" } */
28 printf ("%qs", s); /* { dg-warning "length" "bad use of %q" } */
29 printf ("%qp", p); /* { dg-warning "length" "bad use of %q" } */
30 printf ("%qC", lc); /* { dg-warning "length" "bad use of %q" } */
31 printf ("%qS", ls); /* { dg-warning "length" "bad use of %q" } */
32 /* With a bad length GCC wants some argument, any argument,
33 to devour with the format conversion, as a synchronisation heuristic.
34 This may get improved later.
35 */
36 printf ("%qm", i); /* { dg-warning "length" "bad use of %q" } */
37 /* As an extension, GCC allows the length "Z" as a synonym for "z".
38 This was an extension predating C99 which should now be considered
39 deprecated; use the standard "z" instead.
40 */
41 printf ("%Zd%Zi%Zo%Zu%Zx%ZX", z, z, z, z, z, z);
42 printf ("%Zn", zn);
43 printf ("%Zf", d); /* { dg-warning "length" "bad use of %Z" } */
44 printf ("%ZF", d); /* { dg-warning "length" "bad use of %Z" } */
45 printf ("%Ze", d); /* { dg-warning "length" "bad use of %Z" } */
46 printf ("%ZE", d); /* { dg-warning "length" "bad use of %Z" } */
47 printf ("%Zg", d); /* { dg-warning "length" "bad use of %Z" } */
48 printf ("%ZG", d); /* { dg-warning "length" "bad use of %Z" } */
49 printf ("%Za", d); /* { dg-warning "length" "bad use of %Z" } */
50 printf ("%ZA", d); /* { dg-warning "length" "bad use of %Z" } */
51 printf ("%Zc", i); /* { dg-warning "length" "bad use of %Z" } */
52 printf ("%Zs", s); /* { dg-warning "length" "bad use of %Z" } */
53 printf ("%Zp", p); /* { dg-warning "length" "bad use of %Z" } */
54 printf ("%ZC", lc); /* { dg-warning "length" "bad use of %Z" } */
55 printf ("%ZS", ls); /* { dg-warning "length" "bad use of %Z" } */
56 printf ("%Zm", i); /* { dg-warning "length" "bad use of %Z" } */
57 /* As an extension, GCC allows the length "L" on integer formats
58 (but not %n) as a synonym for "ll".
59 This should be considered deprecated.
60 */
61 printf ("%Ld%Li%Lo%Lu%Lx%LX", ll, ll, ull, ull, ull, ull);
62 /* As an extension, derived from syslog, GCC allows the conversion
63 specifier "m" for formatting strerror(errno). This may be used
64 with width, precision and the "-" flag, the same as %s.
65 */
66 printf ("%m%3m%.4m%5.6m");
67 printf ("%*m", i);
68 printf ("%.*m", i);
69 printf ("%*.*m", i, i);
70 printf ("%3.*m", i);
71 printf ("%*.4m", i);
72 printf ("%-m");
73 printf ("%+m"); /* { dg-warning "flag" "bad %+m" } */
74 printf ("% m"); /* { dg-warning "flag" "bad % m" } */
75 printf ("%#m"); /* { dg-warning "flag" "bad %#m" } */
76 printf ("%0m"); /* { dg-warning "flag" "bad %0m" } */
77 printf ("%'m"); /* { dg-warning "flag" "bad %'m" } */
78 printf ("%hm", i); /* { dg-warning "length" "bad %hm" } */
79 printf ("%hhm", i); /* { dg-warning "length" "bad %hhm" } */
80 printf ("%lm", i); /* { dg-warning "length" "bad %lm" } */
81 printf ("%llm", i); /* { dg-warning "length" "bad %llm" } */
82 printf ("%jm", i); /* { dg-warning "length" "bad %jm" } */
83 printf ("%zm", i); /* { dg-warning "length" "bad %zm" } */
84 printf ("%tm", i); /* { dg-warning "length" "bad %tm" } */
85 printf ("%Lm", i); /* { dg-warning "length" "bad %Lm" } */
86 printf ("%qm", i); /* { dg-warning "length" "bad %qm" } */
87 printf ("%Zm", i); /* { dg-warning "length" "bad %Zm" } */
88 /* It should be OK to mix %m formats with $ operand number formats. */
89 printf ("%2$ld%m%1$d", i, l);
90 /* Likewise, %m formats with width and precision should not have an
91 operand number for the %m itself.
92 */
93 printf ("%*2$.*1$m", i, i);
94 printf ("%1$*2$.*1$m", i, i); /* { dg-warning "no argument" "printf %1\$m" } */
95 /* As an extension, glibc includes the "I" flag for decimal
96 formats, to output using the locale's digits (e.g. in Arabic).
97 In GCC, we require this to be in the standard place for flags, though
98 glibc allows it also after width or precision.
99 */
100 printf ("%Id%Ii%Iu", i, i, u);
101 printf ("%Io", u); /* { dg-warning "flag" "bad use of I flag" } */
102 printf ("%Ix", u); /* { dg-warning "flag" "bad use of I flag" } */
103 printf ("%IX", u); /* { dg-warning "flag" "bad use of I flag" } */
104 printf ("%In", n); /* { dg-warning "flag" "bad use of I flag" } */
105 printf ("%If", d);
106 printf ("%IF", d);
107 printf ("%Ie", d);
108 printf ("%IE", d);
109 printf ("%Ig", d);
110 printf ("%IG", d);
111 printf ("%Ia", d); /* { dg-warning "flag" "bad use of I flag" } */
112 printf ("%IA", d); /* { dg-warning "flag" "bad use of I flag" } */
113 printf ("%Ic", i); /* { dg-warning "flag" "bad use of I flag" } */
114 printf ("%Is", s); /* { dg-warning "flag" "bad use of I flag" } */
115 printf ("%Ip", p); /* { dg-warning "flag" "bad use of I flag" } */
116 printf ("%IC", lc); /* { dg-warning "flag" "bad use of I flag" } */
117 printf ("%IS", ls); /* { dg-warning "flag" "bad use of I flag" } */
118 printf ("%Im"); /* { dg-warning "flag" "bad use of I flag" } */
119
120 /* As an extension, GCC does format checking on "unlocked"
121 i.e. thread unsafe versions of these functions. */
122 fprintf_unlocked (stdout, "%d", i);
123 fprintf_unlocked (stdout, "%ld", i); /* { dg-warning "format" "fprintf_unlocked" } */
124 printf_unlocked ("%d", i);
125 printf_unlocked ("%ld", i); /* { dg-warning "format" "printf_unlocked" } */
126 }