/* Test for scanf formats. Formats using C90 features, including cases where C90 specifies some aspect of the format to be ignored or where the behavior is undefined. */ /* Origin: Joseph Myers */ /* { dg-do compile { target { *-*-mingw* } } } */ /* { dg-options "-std=iso9899:1990 -pedantic -Wformat" } */ #define USE_SYSTEM_FORMATS #include "format.h" void foo (int *ip, unsigned int *uip, short int *hp, unsigned short int *uhp, long int *lp, unsigned long int *ulp, float *fp, double *dp, long double *ldp, char *s, signed char *ss, unsigned char *us, void **pp, int *n, llong *llp, ullong *ullp, wchar_t *ls, const int *cip, const int *cn, const char *cs, const void **ppc, void *const *pcp, short int *hn, long int *ln, void *p, char **sp, volatile void *ppv) { /* See ISO/IEC 9899:1990 (E) subclause 7.9.6.2 (pages 134-138). */ /* Basic sanity checks for the different components of a format. */ scanf ("%d", ip); scanf ("%*d"); scanf ("%3d", ip); scanf ("%hd", hp); scanf ("%3ld", lp); scanf ("%*3d"); scanf ("%d %ld", ip, lp); /* Valid and invalid %% constructions. */ scanf ("%%"); scanf ("%*%"); /* { dg-warning "format" "bogus %%" } */ scanf ("%*%\n"); /* { dg-warning "format" "bogus %%" } */ scanf ("%4%"); /* { dg-warning "format" "bogus %%" } */ scanf ("%4%\n"); /* { dg-warning "format" "bogus %%" } */ scanf ("%h%"); /* { dg-warning "format" "bogus %%" } */ scanf ("%h%\n"); /* { dg-warning "format" "bogus %%" } */ /* Valid, invalid and silly assignment-suppression constructions. */ scanf ("%*d%*i%*o%*u%*x%*X%*e%*E%*f%*g%*G%*s%*[abc]%*c%*p"); scanf ("%*2d%*8s%*3c"); scanf ("%*n", n); /* { dg-warning "suppress" "suppression of %n" } */ scanf ("%*hd"); /* { dg-warning "together" "suppression with length" } */ /* Valid, invalid and silly width constructions. */ scanf ("%2d%3i%4o%5u%6x%7X%8e%9E%10f%11g%12G%13s%14[abc]%15c%16p", ip, ip, uip, uip, uip, uip, fp, fp, fp, fp, fp, s, s, s, pp); scanf ("%0d", ip); /* { dg-warning "width" "warning for zero width" } */ scanf ("%3n", n); /* { dg-warning "width" "width with %n" } */ /* Valid and invalid %h, %l, %L constructions. */ scanf ("%hd%hi%ho%hu%hx%hX%hn", hp, hp, uhp, uhp, uhp, uhp, hn); scanf ("%he", fp); /* { dg-warning "length" "bad use of %h" } */ scanf ("%hE", fp); /* { dg-warning "length" "bad use of %h" } */ scanf ("%hf", fp); /* { dg-warning "length" "bad use of %h" } */ scanf ("%hg", fp); /* { dg-warning "length" "bad use of %h" } */ scanf ("%hG", fp); /* { dg-warning "length" "bad use of %h" } */ scanf ("%hs", hp); scanf ("%h[ac]", s); /* { dg-warning "length" "bad use of %h" } */ scanf ("%hc", hp); scanf ("%hp", pp); /* { dg-warning "length" "bad use of %h" } */ scanf ("%h"); /* { dg-warning "conversion lacks type" "bare %h" } */ scanf ("%h."); /* { dg-warning "conversion" "bogus %h" } */ scanf ("%ld%li%lo%lu%lx%lX%ln", lp, lp, ulp, ulp, ulp, ulp, ln); scanf ("%le%lE%lf%lg%lG", dp, dp, dp, dp, dp); scanf ("%lp", pp); /* { dg-warning "length" "bad use of %l" } */ /* These next three formats were added in C94. */ scanf ("%ls", ls); /* { dg-warning "length|C" "bad use of %l" } */ scanf ("%l[ac]", ls); /* { dg-warning "length|C" "bad use of %l" } */ scanf ("%lc", ls); /* { dg-warning "length|C" "bad use of %l" } */ scanf ("%Ld", llp); /* { dg-warning "unknown|format" "%L is unsupported" } */ scanf ("%Li", llp); /* { dg-warning "unknown|format" "%L is unsupported" } */ scanf ("%Lo", ullp); /* { dg-warning "unknown|format" "%L is unsupported" } */ scanf ("%Lu", ullp); /* { dg-warning "unknown|format" "%L is unsupported" } */ scanf ("%Lx", ullp); /* { dg-warning "unknown|format" "%L is unsupported" } */ scanf ("%LX", ullp); /* { dg-warning "unknown|format" "%L is unsupported" } */ scanf ("%Ls", s); /* { dg-warning "unknown|format" "%L is unsupported" } */ scanf ("%L[ac]", s); /* { dg-warning "unknown|format" "%L is unsupported" } */ scanf ("%Lc", s); /* { dg-warning "unknown|format" "%L is unsupported" } */ scanf ("%Lp", pp); /* { dg-warning "unknown|format" "%L is unsupported" } */ scanf ("%Ln", n); /* { dg-warning "unknown|format" "%L is unsupported" } */ /* Valid uses of each bare conversion. */ scanf ("%d%i%o%u%x%X%e%E%f%g%G%s%[abc]%c%p%n%%", ip, ip, uip, uip, uip, uip, fp, fp, fp, fp, fp, s, s, s, pp, n); /* Allow other character pointers with %s, %c, %[]. */ scanf ("%2s%3s%4c%5c%6[abc]%7[abc]", ss, us, ss, us, ss, us); /* Further tests for %[]. */ scanf ("%[%d]%d", s, ip); scanf ("%[^%d]%d", s, ip); scanf ("%[]%d]%d", s, ip); scanf ("%[^]%d]%d", s, ip); scanf ("%[%d]%d", s, ip); scanf ("%[]abcd", s); /* { dg-warning "no closing" "incomplete scanset" } */ /* Various tests of bad argument types. Some of these are only pedantic warnings. */ scanf ("%d", lp); /* { dg-warning "format" "bad argument types" } */ scanf ("%d", uip); /* { dg-warning "format" "bad argument types" } */ scanf ("%d", pp); /* { dg-warning "format" "bad argument types" } */ scanf ("%p", ppc); /* { dg-warning "format" "bad argument types" } */ scanf ("%p", ppv); /* { dg-warning "format" "bad argument types" } */ scanf ("%s", n); /* { dg-warning "format" "bad argument types" } */ scanf ("%s", p); /* { dg-warning "format" "bad argument types" } */ scanf ("%p", p); /* { dg-warning "format" "bad argument types" } */ scanf ("%p", sp); /* { dg-warning "format" "bad argument types" } */ /* Tests for writing into constant values. */ scanf ("%d", cip); /* { dg-warning "constant" "%d writing into const" } */ scanf ("%n", cn); /* { dg-warning "constant" "%n writing into const" } */ scanf ("%s", cs); /* { dg-warning "constant" "%s writing into const" } */ scanf ("%p", pcp); /* { dg-warning "constant" "%p writing into const" } */ /* Wrong number of arguments. */ scanf ("%d%d", ip); /* { dg-warning "arguments" "wrong number of args" } */ scanf ("%d", ip, ip); /* { dg-warning "arguments" "wrong number of args" } */ /* Miscellaneous bogus constructions. */ scanf (""); /* { dg-warning "zero-length" "warning for empty format" } */ scanf ("\0"); /* { dg-warning "embedded" "warning for embedded NUL" } */ scanf ("%d\0", ip); /* { dg-warning "embedded" "warning for embedded NUL" } */ scanf ("%d\0%d", ip, ip); /* { dg-warning "embedded|too many" "warning for embedded NUL" } */ scanf (NULL); /* { dg-warning "null" "null format string warning" } */ scanf ("%"); /* { dg-warning "trailing" "trailing % warning" } */ scanf ("%d", (int *)0); /* { dg-warning "null" "writing into NULL" } */ }