stdio-common/tst-printf.c

   1 /* Copyright (C) 1991-2015 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 static void rfg1 (void);
  36 static void rfg2 (void);
  37 static void rfg3 (void);
  38
  39
  40 static void
  41 fmtchk (const char *fmt)
  42 {
  43   (void) fputs(fmt, stdout);
  44   (void) printf(":\t`");
  45   (void) printf(fmt, 0x12);
  46   (void) printf("'\n");
  47 }
  48
  49 static void
  50 fmtst1chk (const char *fmt)
  51 {
  52   (void) fputs(fmt, stdout);
  53   (void) printf(":\t`");
  54   (void) printf(fmt, 4, 0x12);
  55   (void) printf("'\n");
  56 }
  57
  58 static void
  59 fmtst2chk (const char *fmt)
  60 {
  61   (void) fputs(fmt, stdout);
  62   (void) printf(":\t`");
  63   (void) printf(fmt, 4, 4, 0x12);
  64   (void) printf("'\n");
  65 }
  66 \f
  67 /* This page is covered by the following copyright: */
  68
  69 /* (C) Copyright C E Chew
  70  *
  71  * Feel free to copy, use and distribute this software provided:
  72  *
  73  *      1. you do not pretend that you wrote it
  74  *      2. you leave this copyright notice intact.
  75  */
  76
  77 /*
  78  * Extracted from exercise.c for glibc-1.05 bug report by Bruce Evans.
  79  */
  80
  81 #define DEC -123
  82 #define INT 255
  83 #define UNS (~0)
  84
  85 /* Formatted Output Test
  86  *
  87  * This exercises the output formatting code.
  88  */
  89
  90 static void
  91 fp_test (void)
  92 {
  93   int i, j, k, l;
  94   char buf[7];
  95   char *prefix = buf;
  96   char tp[20];
  97
  98   puts("\nFormatted output test");
  99   printf("prefix  6d      6o      6x      6X      6u\n");
 100   strcpy(prefix, "%");
 101   for (i = 0; i < 2; i++) {
 102     for (j = 0; j < 2; j++) {
 103       for (k = 0; k < 2; k++) {
 104         for (l = 0; l < 2; l++) {
 105           strcpy(prefix, "%");
 106           if (i == 0) strcat(prefix, "-");
 107           if (j == 0) strcat(prefix, "+");
 108           if (k == 0) strcat(prefix, "#");
 109           if (l == 0) strcat(prefix, "0");
 110           printf("%5s |", prefix);
 111           strcpy(tp, prefix);
 112           strcat(tp, "6d |");
 113           printf(tp, DEC);
 114           strcpy(tp, prefix);
 115           strcat(tp, "6o |");
 116           printf(tp, INT);
 117           strcpy(tp, prefix);
 118           strcat(tp, "6x |");
 119           printf(tp, INT);
 120           strcpy(tp, prefix);
 121           strcat(tp, "6X |");
 122           printf(tp, INT);
 123           strcpy(tp, prefix);
 124           strcat(tp, "6u |");
 125           printf(tp, UNS);
 126           printf("\n");
 127         }
 128       }
 129     }
 130   }
 131   printf("%10s\n", (char *) NULL);
 132   printf("%-10s\n", (char *) NULL);
 133 }
 134 \f
 135 int
 136 main (int argc, char *argv[])
 137 {
 138   static char shortstr[] = "Hi, Z.";
 139   static char longstr[] = "Good morning, Doctor Chandra.  This is Hal.  \
 140 I am ready for my first lesson today.";
 141   int result = 0;
 142
 143   fmtchk("%.4x");
 144   fmtchk("%04x");
 145   fmtchk("%4.4x");
 146   fmtchk("%04.4x");
 147   fmtchk("%4.3x");
 148   fmtchk("%04.3x");
 149
 150   fmtst1chk("%.*x");
 151   fmtst1chk("%0*x");
 152   fmtst2chk("%*.*x");
 153   fmtst2chk("%0*.*x");
 154
 155 #ifndef BSD
 156   printf("bad format:\t\"%b\"\n");
 157   printf("nil pointer (padded):\t\"%10p\"\n", (void *) NULL);
 158 #endif
 159
 160   printf("decimal negative:\t\"%d\"\n", -2345);
 161   printf("octal negative:\t\"%o\"\n", -2345);
 162   printf("hex negative:\t\"%x\"\n", -2345);
 163   printf("long decimal number:\t\"%ld\"\n", -123456L);
 164   printf("long octal negative:\t\"%lo\"\n", -2345L);
 165   printf("long unsigned decimal number:\t\"%lu\"\n", -123456L);
 166   printf("zero-padded LDN:\t\"%010ld\"\n", -123456L);
 167   printf("left-adjusted ZLDN:\t\"%-010ld\"\n", -123456L);
 168   printf("space-padded LDN:\t\"%10ld\"\n", -123456L);
 169   printf("left-adjusted SLDN:\t\"%-10ld\"\n", -123456L);
 170
 171   printf("zero-padded string:\t\"%010s\"\n", shortstr);
 172   printf("left-adjusted Z string:\t\"%-010s\"\n", shortstr);
 173   printf("space-padded string:\t\"%10s\"\n", shortstr);
 174   printf("left-adjusted S string:\t\"%-10s\"\n", shortstr);
 175   printf("null string:\t\"%s\"\n", (char *)NULL);
 176   printf("limited string:\t\"%.22s\"\n", longstr);
 177
 178   printf("e-style >= 1:\t\"%e\"\n", 12.34);
 179   printf("e-style >= .1:\t\"%e\"\n", 0.1234);
 180   printf("e-style < .1:\t\"%e\"\n", 0.001234);
 181   printf("e-style big:\t\"%.60e\"\n", 1e20);
 182   printf ("e-style == .1:\t\"%e\"\n", 0.1);
 183   printf("f-style >= 1:\t\"%f\"\n", 12.34);
 184   printf("f-style >= .1:\t\"%f\"\n", 0.1234);
 185   printf("f-style < .1:\t\"%f\"\n", 0.001234);
 186   printf("g-style >= 1:\t\"%g\"\n", 12.34);
 187   printf("g-style >= .1:\t\"%g\"\n", 0.1234);
 188   printf("g-style < .1:\t\"%g\"\n", 0.001234);
 189   printf("g-style big:\t\"%.60g\"\n", 1e20);
 190
 191   printf (" %6.5f\n", .099999999860301614);
 192   printf (" %6.5f\n", .1);
 193   printf ("x%5.4fx\n", .5);
 194
 195   printf ("%#03x\n", 1);
 196
 197   printf ("something really insane: %.10000f\n", 1.0);
 198
 199   {
 200     double d = FLT_MIN;
 201     int niter = 17;
 202
 203     while (niter-- != 0)
 204       printf ("%.17e\n", d / 2);
 205     fflush (stdout);
 206   }
 207
 208   printf ("%15.5e\n", 4.9406564584124654e-324);
 209
 210 #define FORMAT "|%12.4f|%12.4e|%12.4g|\n"
 211   printf (FORMAT, 0.0, 0.0, 0.0);
 212   printf (FORMAT, 1.0, 1.0, 1.0);
 213   printf (FORMAT, -1.0, -1.0, -1.0);
 214   printf (FORMAT, 100.0, 100.0, 100.0);
 215   printf (FORMAT, 1000.0, 1000.0, 1000.0);
 216   printf (FORMAT, 10000.0, 10000.0, 10000.0);
 217   printf (FORMAT, 12345.0, 12345.0, 12345.0);
 218   printf (FORMAT, 100000.0, 100000.0, 100000.0);
 219   printf (FORMAT, 123456.0, 123456.0, 123456.0);
 220 #undef  FORMAT
 221
 222   {
 223     char buf[20];
 224     char buf2[512];
 225     printf ("snprintf (\"%%30s\", \"foo\") == %d, \"%.*s\"\n",
 226             snprintf (buf, sizeof (buf), "%30s", "foo"), (int) sizeof (buf),
 227             buf);
 228     printf ("snprintf (\"%%.999999u\", 10) == %d\n",
 229             snprintf(buf2, sizeof(buf2), "%.999999u", 10));
 230   }
 231
 232   fp_test ();
 233
 234   printf ("%e should be 1.234568e+06\n", 1234567.8);
 235   printf ("%f should be 1234567.800000\n", 1234567.8);
 236   printf ("%g should be 1.23457e+06\n", 1234567.8);
 237   printf ("%g should be 123.456\n", 123.456);
 238   printf ("%g should be 1e+06\n", 1000000.0);
 239   printf ("%g should be 10\n", 10.0);
 240   printf ("%g should be 0.02\n", 0.02);
 241
 242 #if 0
 243   /* This test rather checks the way the compiler handles constant
 244      folding.  gcc behavior wrt to this changed in 3.2 so it is not a
 245      portable test.  */
 246   {
 247     double x=1.0;
 248     printf("%.17f\n",(1.0/x/10.0+1.0)*x-x);
 249   }
 250 #endif
 251
 252   {
 253     char buf[200];
 254
 255     sprintf(buf,"%*s%*s%*s",-1,"one",-20,"two",-30,"three");
 256
 257     result |= strcmp (buf,
 258                       "onetwo                 three                         ");
 259
 260     puts (result != 0 ? "Test failed!" : "Test ok.");
 261   }
 262
 263   {
 264     char buf[200];
 265
 266     sprintf (buf, "%07Lo", 040000000000ll);
 267     printf ("sprintf (buf, \"%%07Lo\", 040000000000ll) = %s", buf);
 268
 269     if (strcmp (buf, "40000000000") != 0)
 270       {
 271         result = 1;
 272         fputs ("\tFAILED", stdout);
 273       }
 274     puts ("");
 275   }
 276
 277   printf ("printf (\"%%hhu\", %u) = %hhu\n", UCHAR_MAX + 2, UCHAR_MAX + 2);
 278   printf ("printf (\"%%hu\", %u) = %hu\n", USHRT_MAX + 2, USHRT_MAX + 2);
 279   printf ("printf (\"%%hhi\", %i) = %hhi\n", UCHAR_MAX + 2, UCHAR_MAX + 2);
 280   printf ("printf (\"%%hi\", %i) = %hi\n", USHRT_MAX + 2, USHRT_MAX + 2);
 281
 282   printf ("printf (\"%%1$hhu\", %2$u) = %1$hhu\n",
 283           UCHAR_MAX + 2, UCHAR_MAX + 2);
 284   printf ("printf (\"%%1$hu\", %2$u) = %1$hu\n", USHRT_MAX + 2, USHRT_MAX + 2);
 285   printf ("printf (\"%%1$hhi\", %2$i) = %1$hhi\n",
 286           UCHAR_MAX + 2, UCHAR_MAX + 2);
 287   printf ("printf (\"%%1$hi\", %2$i) = %1$hi\n", USHRT_MAX + 2, USHRT_MAX + 2);
 288
 289   puts ("--- Should be no further output. ---");
 290   rfg1 ();
 291   rfg2 ();
 292   rfg3 ();
 293
 294   {
 295     char bytes[7];
 296     char buf[20];
 297
 298     memset (bytes, '\xff', sizeof bytes);
 299     sprintf (buf, "foo%hhn\n", &bytes[3]);
 300     if (bytes[0] != '\xff' || bytes[1] != '\xff' || bytes[2] != '\xff'
 301         || bytes[4] != '\xff' || bytes[5] != '\xff' || bytes[6] != '\xff')
 302       {
 303         puts ("%hhn overwrite more bytes");
 304         result = 1;
 305       }
 306     if (bytes[3] != 3)
 307       {
 308         puts ("%hhn wrote incorrect value");
 309         result = 1;
 310       }
 311   }
 312
 313   return result != 0;
 314 }
 315 \f
 316 static void
 317 rfg1 (void)
 318 {
 319   char buf[100];
 320
 321   sprintf (buf, "%5.s", "xyz");
 322   if (strcmp (buf, "     ") != 0)
 323     printf ("got: '%s', expected: '%s'\n", buf, "     ");
 324   sprintf (buf, "%5.f", 33.3);
 325   if (strcmp (buf, "   33") != 0)
 326     printf ("got: '%s', expected: '%s'\n", buf, "   33");
 327   sprintf (buf, "%8.e", 33.3e7);
 328   if (strcmp (buf, "   3e+08") != 0)
 329     printf ("got: '%s', expected: '%s'\n", buf, "   3e+08");
 330   sprintf (buf, "%8.E", 33.3e7);
 331   if (strcmp (buf, "   3E+08") != 0)
 332     printf ("got: '%s', expected: '%s'\n", buf, "   3E+08");
 333   sprintf (buf, "%.g", 33.3);
 334   if (strcmp (buf, "3e+01") != 0)
 335     printf ("got: '%s', expected: '%s'\n", buf, "3e+01");
 336   sprintf (buf, "%.G", 33.3);
 337   if (strcmp (buf, "3E+01") != 0)
 338     printf ("got: '%s', expected: '%s'\n", buf, "3E+01");
 339 }
 340
 341 static void
 342 rfg2 (void)
 343 {
 344   int prec;
 345   char buf[100];
 346
 347   prec = 0;
 348   sprintf (buf, "%.*g", prec, 3.3);
 349   if (strcmp (buf, "3") != 0)
 350     printf ("got: '%s', expected: '%s'\n", buf, "3");
 351   prec = 0;
 352   sprintf (buf, "%.*G", prec, 3.3);
 353   if (strcmp (buf, "3") != 0)
 354     printf ("got: '%s', expected: '%s'\n", buf, "3");
 355   prec = 0;
 356   sprintf (buf, "%7.*G", prec, 3.33);
 357   if (strcmp (buf, "      3") != 0)
 358     printf ("got: '%s', expected: '%s'\n", buf, "      3");
 359   prec = 3;
 360   sprintf (buf, "%04.*o", prec, 33);
 361   if (strcmp (buf, " 041") != 0)
 362     printf ("got: '%s', expected: '%s'\n", buf, " 041");
 363   prec = 7;
 364   sprintf (buf, "%09.*u", prec, 33);
 365   if (strcmp (buf, "  0000033") != 0)
 366     printf ("got: '%s', expected: '%s'\n", buf, "  0000033");
 367   prec = 3;
 368   sprintf (buf, "%04.*x", prec, 33);
 369   if (strcmp (buf, " 021") != 0)
 370     printf ("got: '%s', expected: '%s'\n", buf, " 021");
 371   prec = 3;
 372   sprintf (buf, "%04.*X", prec, 33);
 373   if (strcmp (buf, " 021") != 0)
 374     printf ("got: '%s', expected: '%s'\n", buf, " 021");
 375 }
 376
 377 static void
 378 rfg3 (void)
 379 {
 380   char buf[100];
 381   double g = 5.0000001;
 382   unsigned long l = 1234567890;
 383   double d = 321.7654321;
 384   const char s[] = "test-string";
 385   int i = 12345;
 386   int h = 1234;
 387
 388   sprintf (buf,
 389            "%1$*5$d %2$*6$hi %3$*7$lo %4$*8$f %9$*12$e %10$*13$g %11$*14$s",
 390            i, h, l, d, 8, 5, 14, 14, d, g, s, 14, 3, 14);
 391   if (strcmp (buf,
 392               "   12345  1234    11145401322     321.765432   3.217654e+02   5    test-string") != 0)
 393     printf ("got: '%s', expected: '%s'\n", buf,
 394             "   12345  1234    11145401322     321.765432   3.217654e+02   5    test-string");
 395 }