gcc/testsuite/gcc.dg/format/c90-scanf-1.c

   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
  11 void
  12 foo (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 "arguments" "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 }