stdio-common/tst-printf.c

   1 /* Copyright (C) 1991-2017 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #ifdef  BSD
  19 #include </usr/include/stdio.h>
  20 #define EXIT_SUCCESS 0
  21 #else
  22 #include <limits.h>
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #endif
  27
  28 #include <float.h>
  29 #include <libc-internal.h>
  30
  31 /* This whole file is picayune tests of corner cases of printf format strings.
  32    The compiler warnings are not useful here.  */
  33 DIAG_IGNORE_NEEDS_COMMENT (4.9, "-Wformat");
  34
  35 #if __GNUC_PREREQ (7, 0)
  36 /* Compiler warnings about format lengths should also be ignored.  */
  37 DIAG_IGNORE_NEEDS_COMMENT (7.0, "-Wformat-length");
  38 #endif
  39
  40 static void rfg1 (void);
  41 static void rfg2 (void);
  42 static void rfg3 (void);
  43
  44
  45 static void
  46 fmtchk (const char *fmt)
  47 {
  48   (void) fputs(fmt, stdout);
  49   (void) printf(":\t`");
  50   (void) printf(fmt, 0x12);
  51   (void) printf("'\n");
  52 }
  53
  54 static void
  55 fmtst1chk (const char *fmt)
  56 {
  57   (void) fputs(fmt, stdout);
  58   (void) printf(":\t`");
  59   (void) printf(fmt, 4, 0x12);
  60   (void) printf("'\n");
  61 }
  62
  63 static void
  64 fmtst2chk (const char *fmt)
  65 {
  66   (void) fputs(fmt, stdout);
  67   (void) printf(":\t`");
  68   (void) printf(fmt, 4, 4, 0x12);
  69   (void) printf("'\n");
  70 }
  71 \f
  72 /* This page is covered by the following copyright: */
  73
  74 /* (C) Copyright C E Chew
  75  *
  76  * Feel free to copy, use and distribute this software provided:
  77  *
  78  *      1. you do not pretend that you wrote it
  79  *      2. you leave this copyright notice intact.
  80  */
  81
  82 /*
  83  * Extracted from exercise.c for glibc-1.05 bug report by Bruce Evans.
  84  */
  85
  86 #define DEC -123
  87 #define INT 255
  88 #define UNS (~0)
  89
  90 /* Formatted Output Test
  91  *
  92  * This exercises the output formatting code.
  93  */
  94
  95 static void
  96 fp_test (void)
  97 {
  98   int i, j, k, l;
  99   char buf[7];
 100   char *prefix = buf;
 101   char tp[20];
 102
 103   puts("\nFormatted output test");
 104   printf("prefix  6d      6o      6x      6X      6u\n");
 105   strcpy(prefix, "%");
 106   for (i = 0; i < 2; i++) {
 107     for (j = 0; j < 2; j++) {
 108       for (k = 0; k < 2; k++) {
 109         for (l = 0; l < 2; l++) {
 110           strcpy(prefix, "%");
 111           if (i == 0) strcat(prefix, "-");
 112           if (j == 0) strcat(prefix, "+");
 113           if (k == 0) strcat(prefix, "#");
 114           if (l == 0) strcat(prefix, "0");
 115           printf("%5s |", prefix);
 116           strcpy(tp, prefix);
 117           strcat(tp, "6d |");
 118           printf(tp, DEC);
 119           strcpy(tp, prefix);
 120           strcat(tp, "6o |");
 121           printf(tp, INT);
 122           strcpy(tp, prefix);
 123           strcat(tp, "6x |");
 124           printf(tp, INT);
 125           strcpy(tp, prefix);
 126           strcat(tp, "6X |");
 127           printf(tp, INT);
 128           strcpy(tp, prefix);
 129           strcat(tp, "6u |");
 130           printf(tp, UNS);
 131           printf("\n");
 132         }
 133       }
 134     }
 135   }
 136   printf("%10s\n", (char *) NULL);
 137   printf("%-10s\n", (char *) NULL);
 138 }
 139 \f
 140 static int
 141 do_test (void)
 142 {
 143   static char shortstr[] = "Hi, Z.";
 144   static char longstr[] = "Good morning, Doctor Chandra.  This is Hal.  \
 145 I am ready for my first lesson today.";
 146   int result = 0;
 147
 148   fmtchk("%.4x");
 149   fmtchk("%04x");
 150   fmtchk("%4.4x");
 151   fmtchk("%04.4x");
 152   fmtchk("%4.3x");
 153   fmtchk("%04.3x");
 154
 155   fmtst1chk("%.*x");
 156   fmtst1chk("%0*x");
 157   fmtst2chk("%*.*x");
 158   fmtst2chk("%0*.*x");
 159
 160 #ifndef BSD
 161   printf("bad format:\t\"%b\"\n");
 162   printf("nil pointer (padded):\t\"%10p\"\n", (void *) NULL);
 163 #endif
 164
 165   printf("decimal negative:\t\"%d\"\n", -2345);
 166   printf("octal negative:\t\"%o\"\n", -2345);
 167   printf("hex negative:\t\"%x\"\n", -2345);
 168   printf("long decimal number:\t\"%ld\"\n", -123456L);
 169   printf("long octal negative:\t\"%lo\"\n", -2345L);
 170   printf("long unsigned decimal number:\t\"%lu\"\n", -123456L);
 171   printf("zero-padded LDN:\t\"%010ld\"\n", -123456L);
 172   printf("left-adjusted ZLDN:\t\"%-010ld\"\n", -123456L);
 173   printf("space-padded LDN:\t\"%10ld\"\n", -123456L);
 174   printf("left-adjusted SLDN:\t\"%-10ld\"\n", -123456L);
 175
 176   printf("zero-padded string:\t\"%010s\"\n", shortstr);
 177   printf("left-adjusted Z string:\t\"%-010s\"\n", shortstr);
 178   printf("space-padded string:\t\"%10s\"\n", shortstr);
 179   printf("left-adjusted S string:\t\"%-10s\"\n", shortstr);
 180   printf("null string:\t\"%s\"\n", (char *)NULL);
 181   printf("limited string:\t\"%.22s\"\n", longstr);
 182
 183   printf("e-style >= 1:\t\"%e\"\n", 12.34);
 184   printf("e-style >= .1:\t\"%e\"\n", 0.1234);
 185   printf("e-style < .1:\t\"%e\"\n", 0.001234);
 186   printf("e-style big:\t\"%.60e\"\n", 1e20);
 187   printf ("e-style == .1:\t\"%e\"\n", 0.1);
 188   printf("f-style >= 1:\t\"%f\"\n", 12.34);
 189   printf("f-style >= .1:\t\"%f\"\n", 0.1234);
 190   printf("f-style < .1:\t\"%f\"\n", 0.001234);
 191   printf("g-style >= 1:\t\"%g\"\n", 12.34);
 192   printf("g-style >= .1:\t\"%g\"\n", 0.1234);
 193   printf("g-style < .1:\t\"%g\"\n", 0.001234);
 194   printf("g-style big:\t\"%.60g\"\n", 1e20);
 195
 196   printf (" %6.5f\n", .099999999860301614);
 197   printf (" %6.5f\n", .1);
 198   printf ("x%5.4fx\n", .5);
 199
 200   printf ("%#03x\n", 1);
 201
 202   printf ("something really insane: %.10000f\n", 1.0);
 203
 204   {
 205     double d = FLT_MIN;
 206     int niter = 17;
 207
 208     while (niter-- != 0)
 209       printf ("%.17e\n", d / 2);
 210     fflush (stdout);
 211   }
 212
 213   printf ("%15.5e\n", 4.9406564584124654e-324);
 214
 215 #define FORMAT "|%12.4f|%12.4e|%12.4g|\n"
 216   printf (FORMAT, 0.0, 0.0, 0.0);
 217   printf (FORMAT, 1.0, 1.0, 1.0);
 218   printf (FORMAT, -1.0, -1.0, -1.0);
 219   printf (FORMAT, 100.0, 100.0, 100.0);
 220   printf (FORMAT, 1000.0, 1000.0, 1000.0);
 221   printf (FORMAT, 10000.0, 10000.0, 10000.0);
 222   printf (FORMAT, 12345.0, 12345.0, 12345.0);
 223   printf (FORMAT, 100000.0, 100000.0, 100000.0);
 224   printf (FORMAT, 123456.0, 123456.0, 123456.0);
 225 #undef  FORMAT
 226
 227   {
 228     char buf[20];
 229     char buf2[512];
 230     printf ("snprintf (\"%%30s\", \"foo\") == %d, \"%.*s\"\n",
 231             snprintf (buf, sizeof (buf), "%30s", "foo"), (int) sizeof (buf),
 232             buf);
 233     printf ("snprintf (\"%%.999999u\", 10) == %d\n",
 234             snprintf(buf2, sizeof(buf2), "%.999999u", 10));
 235   }
 236
 237   fp_test ();
 238
 239   printf ("%e should be 1.234568e+06\n", 1234567.8);
 240   printf ("%f should be 1234567.800000\n", 1234567.8);
 241   printf ("%g should be 1.23457e+06\n", 1234567.8);
 242   printf ("%g should be 123.456\n", 123.456);
 243   printf ("%g should be 1e+06\n", 1000000.0);
 244   printf ("%g should be 10\n", 10.0);
 245   printf ("%g should be 0.02\n", 0.02);
 246
 247 #if 0
 248   /* This test rather checks the way the compiler handles constant
 249      folding.  gcc behavior wrt to this changed in 3.2 so it is not a
 250      portable test.  */
 251   {
 252     double x=1.0;
 253     printf("%.17f\n",(1.0/x/10.0+1.0)*x-x);
 254   }
 255 #endif
 256
 257   {
 258     char buf[200];
 259
 260     sprintf(buf,"%*s%*s%*s",-1,"one",-20,"two",-30,"three");
 261
 262     result |= strcmp (buf,
 263                       "onetwo                 three                         ");
 264
 265     puts (result != 0 ? "Test failed!" : "Test ok.");
 266   }
 267
 268   {
 269     char buf[200];
 270
 271     sprintf (buf, "%07Lo", 040000000000ll);
 272     printf ("sprintf (buf, \"%%07Lo\", 040000000000ll) = %s", buf);
 273
 274     if (strcmp (buf, "40000000000") != 0)
 275       {
 276         result = 1;
 277         fputs ("\tFAILED", stdout);
 278       }
 279     puts ("");
 280   }
 281
 282   printf ("printf (\"%%hhu\", %u) = %hhu\n", UCHAR_MAX + 2, UCHAR_MAX + 2);
 283   printf ("printf (\"%%hu\", %u) = %hu\n", USHRT_MAX + 2, USHRT_MAX + 2);
 284   printf ("printf (\"%%hhi\", %i) = %hhi\n", UCHAR_MAX + 2, UCHAR_MAX + 2);
 285   printf ("printf (\"%%hi\", %i) = %hi\n", USHRT_MAX + 2, USHRT_MAX + 2);
 286
 287   printf ("printf (\"%%1$hhu\", %2$u) = %1$hhu\n",
 288           UCHAR_MAX + 2, UCHAR_MAX + 2);
 289   printf ("printf (\"%%1$hu\", %2$u) = %1$hu\n", USHRT_MAX + 2, USHRT_MAX + 2);
 290   printf ("printf (\"%%1$hhi\", %2$i) = %1$hhi\n",
 291           UCHAR_MAX + 2, UCHAR_MAX + 2);
 292   printf ("printf (\"%%1$hi\", %2$i) = %1$hi\n", USHRT_MAX + 2, USHRT_MAX + 2);
 293
 294   puts ("--- Should be no further output. ---");
 295   rfg1 ();
 296   rfg2 ();
 297   rfg3 ();
 298
 299   {
 300     char bytes[7];
 301     char buf[20];
 302
 303     memset (bytes, '\xff', sizeof bytes);
 304     sprintf (buf, "foo%hhn\n", &bytes[3]);
 305     if (bytes[0] != '\xff' || bytes[1] != '\xff' || bytes[2] != '\xff'
 306         || bytes[4] != '\xff' || bytes[5] != '\xff' || bytes[6] != '\xff')
 307       {
 308         puts ("%hhn overwrite more bytes");
 309         result = 1;
 310       }
 311     if (bytes[3] != 3)
 312       {
 313         puts ("%hhn wrote incorrect value");
 314         result = 1;
 315       }
 316   }
 317
 318   return result != 0;
 319 }
 320 \f
 321 static void
 322 rfg1 (void)
 323 {
 324   char buf[100];
 325
 326   sprintf (buf, "%5.s", "xyz");
 327   if (strcmp (buf, "     ") != 0)
 328     printf ("got: '%s', expected: '%s'\n", buf, "     ");
 329   sprintf (buf, "%5.f", 33.3);
 330   if (strcmp (buf, "   33") != 0)
 331     printf ("got: '%s', expected: '%s'\n", buf, "   33");
 332   sprintf (buf, "%8.e", 33.3e7);
 333   if (strcmp (buf, "   3e+08") != 0)
 334     printf ("got: '%s', expected: '%s'\n", buf, "   3e+08");
 335   sprintf (buf, "%8.E", 33.3e7);
 336   if (strcmp (buf, "   3E+08") != 0)
 337     printf ("got: '%s', expected: '%s'\n", buf, "   3E+08");
 338   sprintf (buf, "%.g", 33.3);
 339   if (strcmp (buf, "3e+01") != 0)
 340     printf ("got: '%s', expected: '%s'\n", buf, "3e+01");
 341   sprintf (buf, "%.G", 33.3);
 342   if (strcmp (buf, "3E+01") != 0)
 343     printf ("got: '%s', expected: '%s'\n", buf, "3E+01");
 344 }
 345
 346 static void
 347 rfg2 (void)
 348 {
 349   int prec;
 350   char buf[100];
 351
 352   prec = 0;
 353   sprintf (buf, "%.*g", prec, 3.3);
 354   if (strcmp (buf, "3") != 0)
 355     printf ("got: '%s', expected: '%s'\n", buf, "3");
 356   prec = 0;
 357   sprintf (buf, "%.*G", prec, 3.3);
 358   if (strcmp (buf, "3") != 0)
 359     printf ("got: '%s', expected: '%s'\n", buf, "3");
 360   prec = 0;
 361   sprintf (buf, "%7.*G", prec, 3.33);
 362   if (strcmp (buf, "      3") != 0)
 363     printf ("got: '%s', expected: '%s'\n", buf, "      3");
 364   prec = 3;
 365   sprintf (buf, "%04.*o", prec, 33);
 366   if (strcmp (buf, " 041") != 0)
 367     printf ("got: '%s', expected: '%s'\n", buf, " 041");
 368   prec = 7;
 369   sprintf (buf, "%09.*u", prec, 33);
 370   if (strcmp (buf, "  0000033") != 0)
 371     printf ("got: '%s', expected: '%s'\n", buf, "  0000033");
 372   prec = 3;
 373   sprintf (buf, "%04.*x", prec, 33);
 374   if (strcmp (buf, " 021") != 0)
 375     printf ("got: '%s', expected: '%s'\n", buf, " 021");
 376   prec = 3;
 377   sprintf (buf, "%04.*X", prec, 33);
 378   if (strcmp (buf, " 021") != 0)
 379     printf ("got: '%s', expected: '%s'\n", buf, " 021");
 380 }
 381
 382 static void
 383 rfg3 (void)
 384 {
 385   char buf[100];
 386   double g = 5.0000001;
 387   unsigned long l = 1234567890;
 388   double d = 321.7654321;
 389   const char s[] = "test-string";
 390   int i = 12345;
 391   int h = 1234;
 392
 393   sprintf (buf,
 394            "%1$*5$d %2$*6$hi %3$*7$lo %4$*8$f %9$*12$e %10$*13$g %11$*14$s",
 395            i, h, l, d, 8, 5, 14, 14, d, g, s, 14, 3, 14);
 396   if (strcmp (buf,
 397               "   12345  1234    11145401322     321.765432   3.217654e+02   5    test-string") != 0)
 398     printf ("got: '%s', expected: '%s'\n", buf,
 399             "   12345  1234    11145401322     321.765432   3.217654e+02   5    test-string");
 400 }
 401
 402 #define TEST_FUNCTION do_test ()
 403 #include "../test-skeleton.c"