1/* Test for scanf formats. Formats using C90 features, including cases 2 where C90 specifies some aspect of the format to be ignored or where 3 the behavior is undefined. 4*/ 5/* Origin: Joseph Myers <jsm28@cam.ac.uk> */ 6/* { dg-do compile } */ 7/* { dg-options "-std=iso9899:1990 -pedantic -Wformat" } */ 8 9#include "format.h" 10 11void 12foo (int *ip, unsigned int *uip, short int *hp, unsigned short int *uhp, 13 long int *lp, unsigned long int *ulp, float *fp, double *dp, 14 long double *ldp, char *s, signed char *ss, unsigned char *us, 15 void **pp, int *n, llong *llp, ullong *ullp, wchar_t *ls, 16 const int *cip, const int *cn, const char *cs, const void **ppc, 17 void *const *pcp, short int *hn, long int *ln, void *p, char **sp, 18 volatile void *ppv) 19{ 20 /* See ISO/IEC 9899:1990 (E) subclause 7.9.6.2 (pages 134-138). */ 21 /* Basic sanity checks for the different components of a format. */ 22 scanf ("%d", ip); 23 scanf ("%*d"); 24 scanf ("%3d", ip); 25 scanf ("%hd", hp); 26 scanf ("%3ld", lp); 27 scanf ("%*3d"); 28 scanf ("%d %ld", ip, lp); 29 /* Valid and invalid %% constructions. */ 30 scanf ("%%"); 31 scanf ("%*%"); /* { dg-warning "format" "bogus %%" } */ 32 scanf ("%*%\n"); /* { dg-warning "format" "bogus %%" } */ 33 scanf ("%4%"); /* { dg-warning "format" "bogus %%" } */ 34 scanf ("%4%\n"); /* { dg-warning "format" "bogus %%" } */ 35 scanf ("%h%"); /* { dg-warning "format" "bogus %%" } */ 36 scanf ("%h%\n"); /* { dg-warning "format" "bogus %%" } */ 37 /* Valid, invalid and silly assignment-suppression constructions. */ 38 scanf ("%*d%*i%*o%*u%*x%*X%*e%*E%*f%*g%*G%*s%*[abc]%*c%*p"); 39 scanf ("%*2d%*8s%*3c"); 40 scanf ("%*n", n); /* { dg-warning "suppress" "suppression of %n" } */ 41 scanf ("%*hd"); /* { dg-warning "together" "suppression with length" } */ 42 /* Valid, invalid and silly width constructions. */ 43 scanf ("%2d%3i%4o%5u%6x%7X%8e%9E%10f%11g%12G%13s%14[abc]%15c%16p", 44 ip, ip, uip, uip, uip, uip, fp, fp, fp, fp, fp, s, s, s, pp); 45 scanf ("%0d", ip); /* { dg-warning "width" "warning for zero width" } */ 46 scanf ("%3n", n); /* { dg-warning "width" "width with %n" } */ 47 /* Valid and invalid %h, %l, %L constructions. */ 48 scanf ("%hd%hi%ho%hu%hx%hX%hn", hp, hp, uhp, uhp, uhp, uhp, hn); 49 scanf ("%he", fp); /* { dg-warning "length" "bad use of %h" } */ 50 scanf ("%hE", fp); /* { dg-warning "length" "bad use of %h" } */ 51 scanf ("%hf", fp); /* { dg-warning "length" "bad use of %h" } */ 52 scanf ("%hg", fp); /* { dg-warning "length" "bad use of %h" } */ 53 scanf ("%hG", fp); /* { dg-warning "length" "bad use of %h" } */ 54 scanf ("%hs", s); /* { dg-warning "length" "bad use of %h" } */ 55 scanf ("%h[ac]", s); /* { dg-warning "length" "bad use of %h" } */ 56 scanf ("%hc", s); /* { dg-warning "length" "bad use of %h" } */ 57 scanf ("%hp", pp); /* { dg-warning "length" "bad use of %h" } */ 58 scanf ("%h"); /* { dg-warning "conversion lacks type" "bare %h" } */ 59 scanf ("%h."); /* { dg-warning "conversion" "bogus %h" } */ 60 scanf ("%ld%li%lo%lu%lx%lX%ln", lp, lp, ulp, ulp, ulp, ulp, ln); 61 scanf ("%le%lE%lf%lg%lG", dp, dp, dp, dp, dp); 62 scanf ("%lp", pp); /* { dg-warning "length" "bad use of %l" } */ 63 /* These next three formats were added in C94. */ 64 scanf ("%ls", ls); /* { dg-warning "length|C" "bad use of %l" } */ 65 scanf ("%l[ac]", ls); /* { dg-warning "length|C" "bad use of %l" } */ 66 scanf ("%lc", ls); /* { dg-warning "length|C" "bad use of %l" } */ 67 scanf ("%Le%LE%Lf%Lg%LG", ldp, ldp, ldp, ldp, ldp); 68 scanf ("%Ld", llp); /* { dg-warning "does not support" "bad use of %L" } */ 69 scanf ("%Li", llp); /* { dg-warning "does not support" "bad use of %L" } */ 70 scanf ("%Lo", ullp); /* { dg-warning "does not support" "bad use of %L" } */ 71 scanf ("%Lu", ullp); /* { dg-warning "does not support" "bad use of %L" } */ 72 scanf ("%Lx", ullp); /* { dg-warning "does not support" "bad use of %L" } */ 73 scanf ("%LX", ullp); /* { dg-warning "does not support" "bad use of %L" } */ 74 scanf ("%Ls", s); /* { dg-warning "length" "bad use of %L" } */ 75 scanf ("%L[ac]", s); /* { dg-warning "length" "bad use of %L" } */ 76 scanf ("%Lc", s); /* { dg-warning "length" "bad use of %L" } */ 77 scanf ("%Lp", pp); /* { dg-warning "length" "bad use of %L" } */ 78 scanf ("%Ln", n); /* { dg-warning "length" "bad use of %L" } */ 79 /* Valid uses of each bare conversion. */ 80 scanf ("%d%i%o%u%x%X%e%E%f%g%G%s%[abc]%c%p%n%%", ip, ip, uip, uip, uip, 81 uip, fp, fp, fp, fp, fp, s, s, s, pp, n); 82 /* Allow other character pointers with %s, %c, %[]. */ 83 scanf ("%2s%3s%4c%5c%6[abc]%7[abc]", ss, us, ss, us, ss, us); 84 /* Further tests for %[]. */ 85 scanf ("%[%d]%d", s, ip); 86 scanf ("%[^%d]%d", s, ip); 87 scanf ("%[]%d]%d", s, ip); 88 scanf ("%[^]%d]%d", s, ip); 89 scanf ("%[%d]%d", s, ip); 90 scanf ("%[]abcd", s); /* { dg-warning "no closing" "incomplete scanset" } */ 91 /* Various tests of bad argument types. Some of these are only pedantic 92 warnings. 93 */ 94 scanf ("%d", lp); /* { dg-warning "format" "bad argument types" } */ 95 scanf ("%d", uip); /* { dg-warning "format" "bad argument types" } */ 96 scanf ("%d", pp); /* { dg-warning "format" "bad argument types" } */ 97 scanf ("%p", ppc); /* { dg-warning "format" "bad argument types" } */ 98 scanf ("%p", ppv); /* { dg-warning "format" "bad argument types" } */ 99 scanf ("%s", n); /* { dg-warning "format" "bad argument types" } */ 100 scanf ("%s", p); /* { dg-warning "format" "bad argument types" } */ 101 scanf ("%p", p); /* { dg-warning "format" "bad argument types" } */ 102 scanf ("%p", sp); /* { dg-warning "format" "bad argument types" } */ 103 /* Tests for writing into constant values. */ 104 scanf ("%d", cip); /* { dg-warning "constant" "%d writing into const" } */ 105 scanf ("%n", cn); /* { dg-warning "constant" "%n writing into const" } */ 106 scanf ("%s", cs); /* { dg-warning "constant" "%s writing into const" } */ 107 scanf ("%p", pcp); /* { dg-warning "constant" "%p writing into const" } */ 108 /* Wrong number of arguments. */ 109 scanf ("%d%d", ip); /* { dg-warning "matching" "wrong number of args" } */ 110 scanf ("%d", ip, ip); /* { dg-warning "arguments" "wrong number of args" } */ 111 /* Miscellaneous bogus constructions. */ 112 scanf (""); /* { dg-warning "zero-length" "warning for empty format" } */ 113 scanf ("\0"); /* { dg-warning "embedded" "warning for embedded NUL" } */ 114 scanf ("%d\0", ip); /* { dg-warning "embedded" "warning for embedded NUL" } */ 115 scanf ("%d\0%d", ip, ip); /* { dg-warning "embedded|too many" "warning for embedded NUL" } */ 116 scanf (NULL); /* { dg-warning "null" "null format string warning" } */ 117 scanf ("%"); /* { dg-warning "trailing" "trailing % warning" } */ 118 scanf ("%d", (int *)0); /* { dg-warning "null" "writing into NULL" } */ 119} 120