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