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Diffstat (limited to 'gcc/testsuite/gcc.dg/format/c90-printf-1.c')
| -rw-r--r-- | gcc/testsuite/gcc.dg/format/c90-printf-1.c | 249 |
1 files changed, 249 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/format/c90-printf-1.c b/gcc/testsuite/gcc.dg/format/c90-printf-1.c new file mode 100644 index 0000000..5058066 --- /dev/null +++ b/gcc/testsuite/gcc.dg/format/c90-printf-1.c @@ -0,0 +1,249 @@ +/* Test for printf formats. Formats using C90 features, including cases + where C90 specifies some aspect of the format to be ignored or where + the behaviour is undefined. +*/ +/* Origin: Joseph Myers <jsm28@cam.ac.uk> */ +/* { dg-do compile } */ +/* { dg-options "-std=iso9899:1990 -pedantic -Wformat" } */ + +typedef __WCHAR_TYPE__ wchar_t; + +#ifndef __WINT_TYPE__ +#define __WINT_TYPE__ unsigned int +#endif +typedef __WINT_TYPE__ wint_t; + +__extension__ typedef long long int llong; +__extension__ typedef unsigned long long int ullong; + +extern int printf (const char *, ...); + +#define NULL ((void *)0) + +void +foo (int i, int i1, int i2, unsigned int u, double d, char *s, void *p, + int *n, short int *hn, long int l, unsigned long int ul, + long int *ln, long double ld, wint_t lc, wchar_t *ls, llong ll, + ullong ull, unsigned int *un, const int *cn, signed char *ss, + unsigned char *us, const signed char *css, unsigned int u1, + unsigned int u2) +{ + /* See ISO/IEC 9899:1990 (E) subclause 7.9.6.1 (pages 131-134). */ + /* Basic sanity checks for the different components of a format. */ + printf ("%d\n", i); + printf ("%+d\n", i); + printf ("%3d\n", i); + printf ("%-3d\n", i); + printf ("%.7d\n", i); + printf ("%+9.4d\n", i); + printf ("%.3ld\n", l); + printf ("%*d\n", i1, i); + printf ("%.*d\n", i2, i); + printf ("%*.*ld\n", i1, i2, l); + printf ("%d %lu\n", i, ul); + /* GCC has objected to the next one in the past, but it is a valid way + of specifying zero precision. + */ + printf ("%.e\n", d); /* { dg-bogus "precision" "bogus precision warning" } */ + /* Bogus use of width. */ + printf ("%5n\n", n); /* { dg-warning "width" "width with %n" } */ + /* Erroneous, ignored or pointless constructs with precision. */ + /* Whether negative values for precision may be included in the format + string is not entirely clear; presume not, following Clive Feather's + proposed resolution to DR#220 against C99. In any case, such a + construct should be warned about. + */ + printf ("%.-5d\n", i); /* { dg-warning "format|precision" "negative precision warning" } */ + printf ("%.-*d\n", i); /* { dg-warning "format" "broken %.-*d format" } */ + printf ("%.3c\n", i); /* { dg-warning "precision" "precision with %c" } */ + printf ("%.3p\n", p); /* { dg-warning "precision" "precision with %p" } */ + printf ("%.3n\n", n); /* { dg-warning "precision" "precision with %n" } */ + /* Valid and invalid %% constructions. Some of the warning messages + are non-optimal, but they do detect the errorneous nature of the + format string. + */ + printf ("%%"); + printf ("%.3%"); /* { dg-warning "format" "bogus %%" } */ + printf ("%-%"); /* { dg-warning "format" "bogus %%" } */ + printf ("%-%\n"); /* { dg-warning "format" "bogus %%" } */ + printf ("%5%\n"); /* { dg-warning "format" "bogus %%" } */ + printf ("%h%\n"); /* { dg-warning "format" "bogus %%" } */ + /* Valid and invalid %h, %l, %L constructions. */ + printf ("%hd", i); + printf ("%hi", i); + /* Strictly, these parameters should be int or unsigned int according to + what unsigned short promotes to. However, GCC ignores sign + differences in format checking here, and this is relied on to get the + correct checking without print_char_table needing to know whether + int and short are the same size. + */ + printf ("%ho%hu%hx%hX", u, u, u, u); + printf ("%hn", hn); + printf ("%hf", d); /* { dg-warning "length" "bad use of %h" } */ + printf ("%he", d); /* { dg-warning "length" "bad use of %h" } */ + printf ("%hE", d); /* { dg-warning "length" "bad use of %h" } */ + printf ("%hg", d); /* { dg-warning "length" "bad use of %h" } */ + printf ("%hG", d); /* { dg-warning "length" "bad use of %h" } */ + printf ("%hc", i); /* { dg-warning "length" "bad use of %h" } */ + printf ("%hs", s); /* { dg-warning "length" "bad use of %h" } */ + printf ("%hp", p); /* { dg-warning "length" "bad use of %h" } */ + printf ("%h"); /* { dg-warning "conversion lacks type" "bare %h" } */ + printf ("%h."); /* { dg-warning "conversion" "bogus %h." } */ + printf ("%ld%li%lo%lu%lx%lX", l, l, ul, ul, ul, ul); + printf ("%ln", ln); + printf ("%lf", d); /* { dg-warning "length|C" "bad use of %l" } */ + printf ("%le", d); /* { dg-warning "length|C" "bad use of %l" } */ + printf ("%lE", d); /* { dg-warning "length|C" "bad use of %l" } */ + printf ("%lg", d); /* { dg-warning "length|C" "bad use of %l" } */ + printf ("%lG", d); /* { dg-warning "length|C" "bad use of %l" } */ + printf ("%lp", p); /* { dg-warning "length|C" "bad use of %l" } */ + /* These next two were added in C94, but should be objected to in C90. + For the first one, GCC has wanted wchar_t instead of the correct C94 + and C99 wint_t. + */ + printf ("%lc", lc); /* { dg-warning "length|C" "C90 bad use of %l" } */ + printf ("%ls", ls); /* { dg-warning "length|C" "C90 bad use of %l" } */ + /* These uses of %L are legitimate, though GCC has wrongly warned for + them in the past. + */ + printf ("%Le%LE%Lf%Lg%LG", ld, ld, ld, ld, ld); + /* These next six are accepted by GCC as referring to long long, + but -pedantic correctly warns. + */ + printf ("%Ld", ll); /* { dg-warning "does not support" "bad use of %L" } */ + printf ("%Li", ll); /* { dg-warning "does not support" "bad use of %L" } */ + printf ("%Lo", ull); /* { dg-warning "does not support" "bad use of %L" } */ + printf ("%Lu", ull); /* { dg-warning "does not support" "bad use of %L" } */ + printf ("%Lx", ull); /* { dg-warning "does not support" "bad use of %L" } */ + printf ("%LX", ull); /* { dg-warning "does not support" "bad use of %L" } */ + printf ("%Lc", i); /* { dg-warning "length" "bad use of %L" } */ + printf ("%Ls", s); /* { dg-warning "length" "bad use of %L" } */ + printf ("%Lp", p); /* { dg-warning "length" "bad use of %L" } */ + printf ("%Ln", n); /* { dg-warning "length" "bad use of %L" } */ + /* Valid uses of each bare conversion. */ + printf ("%d%i%o%u%x%X%f%e%E%g%G%c%s%p%n%%", i, i, u, u, u, u, d, d, d, d, d, + i, s, p, n); + /* Uses of the - flag (valid on all non-%, non-n conversions). */ + printf ("%-d%-i%-o%-u%-x%-X%-f%-e%-E%-g%-G%-c%-s%-p", i, i, u, u, u, u, + d, d, d, d, d, i, s, p); + printf ("%-n", n); /* { dg-warning "flag" "bad use of %-n" } */ + /* Uses of the + flag (valid on signed conversions only). */ + printf ("%+d%+i%+f%+e%+E%+g%+G\n", i, i, d, d, d, d, d); + printf ("%+o", u); /* { dg-warning "flag" "bad use of + flag" } */ + printf ("%+u", u); /* { dg-warning "flag" "bad use of + flag" } */ + printf ("%+x", u); /* { dg-warning "flag" "bad use of + flag" } */ + printf ("%+X", u); /* { dg-warning "flag" "bad use of + flag" } */ + printf ("%+c", i); /* { dg-warning "flag" "bad use of + flag" } */ + printf ("%+s", s); /* { dg-warning "flag" "bad use of + flag" } */ + printf ("%+p", p); /* { dg-warning "flag" "bad use of + flag" } */ + printf ("%+n", n); /* { dg-warning "flag" "bad use of + flag" } */ + /* Uses of the space flag (valid on signed conversions only, and ignored + with +). + */ + printf ("% +d", i); /* { dg-warning "use of both|ignored" "use of space and + flags" } */ + printf ("%+ d", i); /* { dg-warning "use of both|ignored" "use of space and + flags" } */ + printf ("% d% i% f% e% E% g% G\n", i, i, d, d, d, d, d); + printf ("% o", u); /* { dg-warning "flag" "bad use of space flag" } */ + printf ("% u", u); /* { dg-warning "flag" "bad use of space flag" } */ + printf ("% x", u); /* { dg-warning "flag" "bad use of space flag" } */ + printf ("% X", u); /* { dg-warning "flag" "bad use of space flag" } */ + printf ("% c", i); /* { dg-warning "flag" "bad use of space flag" } */ + printf ("% s", s); /* { dg-warning "flag" "bad use of space flag" } */ + printf ("% p", p); /* { dg-warning "flag" "bad use of space flag" } */ + printf ("% n", n); /* { dg-warning "flag" "bad use of space flag" } */ + /* Uses of the # flag. */ + printf ("%#o%#x%#X%#e%#E%#f%#g%#G", u, u, u, d, d, d, d, d); + printf ("%#d", i); /* { dg-warning "flag" "bad use of # flag" } */ + printf ("%#i", i); /* { dg-warning "flag" "bad use of # flag" } */ + printf ("%#u", u); /* { dg-warning "flag" "bad use of # flag" } */ + printf ("%#c", i); /* { dg-warning "flag" "bad use of # flag" } */ + printf ("%#s", s); /* { dg-warning "flag" "bad use of # flag" } */ + printf ("%#p", p); /* { dg-warning "flag" "bad use of # flag" } */ + printf ("%#n", n); /* { dg-warning "flag" "bad use of # flag" } */ + /* Uses of the 0 flag. */ + printf ("%08d%08i%08o%08u%08x%08X%08e%08E%08f%08g%08G", i, i, u, u, u, u, + d, d, d, d, d); + printf ("%0c", i); /* { dg-warning "flag" "bad use of 0 flag" } */ + printf ("%0s", s); /* { dg-warning "flag" "bad use of 0 flag" } */ + printf ("%0p", p); /* { dg-warning "flag" "bad use of 0 flag" } */ + printf ("%0n", n); /* { dg-warning "flag" "bad use of 0 flag" } */ + /* 0 flag ignored with precision for certain types, not others. */ + printf ("%08.5d", i); /* { dg-warning "ignored" "0 flag ignored with precision" } */ + printf ("%08.5i", i); /* { dg-warning "ignored" "0 flag ignored with precision" } */ + printf ("%08.5o", u); /* { dg-warning "ignored" "0 flag ignored with precision" } */ + printf ("%08.5u", u); /* { dg-warning "ignored" "0 flag ignored with precision" } */ + printf ("%08.5x", u); /* { dg-warning "ignored" "0 flag ignored with precision" } */ + printf ("%08.5X", u); /* { dg-warning "ignored" "0 flag ignored with precision" } */ + printf ("%08.5f%08.5e%08.5E%08.5g%08.5G", d, d, d, d, d); + /* 0 flag ignored with - flag. */ + printf ("%-08d", i); /* { dg-warning "flags|ignored" "0 flag ignored with - flag" } */ + printf ("%-08i", i); /* { dg-warning "flags|ignored" "0 flag ignored with - flag" } */ + printf ("%-08o", u); /* { dg-warning "flags|ignored" "0 flag ignored with - flag" } */ + printf ("%-08u", u); /* { dg-warning "flags|ignored" "0 flag ignored with - flag" } */ + printf ("%-08x", u); /* { dg-warning "flags|ignored" "0 flag ignored with - flag" } */ + printf ("%-08X", u); /* { dg-warning "flags|ignored" "0 flag ignored with - flag" } */ + printf ("%-08e", d); /* { dg-warning "flags|ignored" "0 flag ignored with - flag" } */ + printf ("%-08E", d); /* { dg-warning "flags|ignored" "0 flag ignored with - flag" } */ + printf ("%-08f", d); /* { dg-warning "flags|ignored" "0 flag ignored with - flag" } */ + printf ("%-08g", d); /* { dg-warning "flags|ignored" "0 flag ignored with - flag" } */ + printf ("%-08G", d); /* { dg-warning "flags|ignored" "0 flag ignored with - flag" } */ + /* Various tests of bad argument types. */ + printf ("%d", l); /* { dg-warning "format" "bad argument types" } */ + printf ("%*.*d", l, i2, i); /* { dg-warning "field" "bad * argument types" } */ + printf ("%*.*d", i1, l, i); /* { dg-warning "field" "bad * argument types" } */ + printf ("%ld", i); /* { dg-warning "format" "bad argument types" } */ + printf ("%s", n); /* { dg-warning "format" "bad argument types" } */ + printf ("%p", i); /* { dg-warning "format" "bad argument types" } */ + printf ("%n", p); /* { dg-warning "format" "bad argument types" } */ + /* With -pedantic, we want some further checks for pointer targets: + %p should allow only pointers to void (possibly qualified) and + to character types (possibly qualified), but not function pointers + or pointers to other types. (Whether, in fact, character types are + allowed here is unclear; see thread on comp.std.c, July 2000 for + discussion of the requirements of rules on identical representation, + and of the application of the as if rule with the new va_arg + allowances in C99 to printf.) Likewise, we should warn if + pointer targets differ in signedness, except in some circumstances + for character pointers. (In C99 we should consider warning for + char * or unsigned char * being passed to %hhn, even if strictly + legitimate by the standard.) + */ + printf ("%p", foo); /* { dg-warning "format" "bad argument types" } */ + printf ("%n", un); /* { dg-warning "format" "bad argument types" } */ + printf ("%p", n); /* { dg-warning "format" "bad argument types" } */ + /* Allow character pointers with %p. */ + printf ("%p%p%p%p", s, ss, us, css); + /* %s allows any character type. */ + printf ("%s%s%s%s", s, ss, us, css); + /* Warning for void * arguments for %s is GCC's historical behaviour, + and seems useful to keep, even if some standard versions might be + read to permit it. + */ + printf ("%s", p); /* { dg-warning "format" "bad argument types" } */ + /* The historical behaviour is to allow signed / unsigned types + interchangably as arguments. For values representable in both types, + such usage may be correct. For now preserve the behaviour of GCC + in such cases. + */ + printf ("%d", u); + /* Also allow the same for width and precision arguments. In the past, + GCC has been inconsistent and allowed unsigned for width but not + precision. + */ + printf ("%*.*d", u1, u2, i); + /* Wrong number of arguments. */ + printf ("%d%d", i); /* { dg-warning "arguments" "wrong number of args" } */ + printf ("%d", i, i); /* { dg-warning "arguments" "wrong number of args" } */ + /* Miscellaneous bogus constructions. */ + printf (""); /* { dg-warning "zero-length" "warning for empty format" } */ + printf ("\0"); /* { dg-warning "embedded" "warning for embedded NUL" } */ + printf ("%d\0", i); /* { dg-warning "embedded" "warning for embedded NUL" } */ + printf ("%d\0%d", i, i); /* { dg-warning "embedded|too many" "warning for embedded NUL" } */ + printf (NULL); /* { dg-warning "null" "null format string warning" } */ + printf ("%"); /* { dg-warning "trailing" "trailing % warning" } */ + printf ("%++d", i); /* { dg-warning "repeated" "repeated flag warning" } */ + printf ("%n", cn); /* { dg-warning "constant" "%n with const" } */ + printf ((const char *)L"foo"); /* { dg-warning "wide" "wide string" } */ + printf ("%n", (int *)0); /* { dg-warning "null" "%n with NULL" } */ + printf ("%s", (char *)0); /* { dg-warning "null" "%s with NULL" } */ +} |