stdio-common/tstscanf.c

   1 /* Copyright (C) 1991-2021 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    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <array_length.h>
  19 #ifdef  BSD
  20 #include </usr/include/stdio.h>
  21 #else
  22 #include <stdio.h>
  23 #endif
  24 #include <math.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27
  28
  29 int
  30 main (int argc, char **argv)
  31 {
  32   char buf[BUFSIZ];
  33   FILE *in = stdin, *out = stdout;
  34   int x;
  35   int result = 0;
  36
  37   if (sscanf ("0", "%d", &x) != 1)
  38     {
  39       fputs ("test failed!\n", stdout);
  40       result = 1;
  41     }
  42
  43   if (sscanf ("08905x", "%9[0-9]", buf) != 1
  44       || strcmp (buf, "08905") != 0)
  45     {
  46       fputs ("test failed!\n", stdout);
  47       result = 1;
  48     }
  49
  50   if (sscanf ("", "%10[a-z]", buf) != EOF)
  51     {
  52       fputs ("test failed!\n", stdout);
  53       result = 1;
  54     }
  55
  56   sscanf ("conversion] Zero flag Ze]ro#\n", "%*[^]] %[^#]\n", buf);
  57   if (strcmp (buf, "] Zero flag Ze]ro") != 0)
  58     {
  59       fputs ("test failed!\n", stdout);
  60       result = 1;
  61     }
  62
  63   if (argc == 2 && !strcmp (argv[1], "-opipe"))
  64     {
  65       out = popen ("/bin/cat", "w");
  66       if (out == NULL)
  67         {
  68           perror ("popen: /bin/cat");
  69           result = 1;
  70         }
  71     }
  72   else if (argc == 3 && !strcmp (argv[1], "-ipipe"))
  73     {
  74       sprintf (buf, "/bin/cat %s", argv[2]);
  75       in = popen (buf, "r");
  76       if (in == NULL)
  77         {
  78           perror ("popen: /bin/cat");
  79           result = 1;
  80         }
  81     }
  82
  83   {
  84     char name[50];
  85     fprintf (out,
  86              "sscanf (\"thompson\", \"%%s\", name) == %d, name == \"%s\"\n",
  87              sscanf ("thompson", "%s", name),
  88              name);
  89     if (strcmp (name, "thompson") != 0)
  90       {
  91         fputs ("test failed!\n", stdout);
  92         result = 1;
  93       }
  94   }
  95
  96   fputs ("Testing scanf (vfscanf)\n", out);
  97
  98   fputs ("Test 1:\n", out);
  99   {
 100     int n, i;
 101     float x;
 102     char name[50];
 103     n = fscanf (in, "%d%f%s", &i, &x, name);
 104     fprintf (out, "n = %d, i = %d, x = %f, name = \"%.50s\"\n",
 105              n, i, x, name);
 106     if (n != 3 || i != 25 || x != 5.432F || strcmp (name, "thompson"))
 107       {
 108         fputs ("test failed!\n", stdout);
 109         result = 1;
 110       }
 111   }
 112   fprintf (out, "Residual: \"%s\"\n", fgets (buf, sizeof (buf), in));
 113   if (strcmp (buf, "\n"))
 114     {
 115       fputs ("test failed!\n", stdout);
 116       result = 1;
 117     }
 118   fputs ("Test 2:\n", out);
 119   {
 120     int i;
 121     float x;
 122     char name[50];
 123     (void) fscanf (in, "%2d%f%*d %[0123456789]", &i, &x, name);
 124     fprintf (out, "i = %d, x = %f, name = \"%.50s\"\n", i, x, name);
 125     if (i != 56 || x != 789.0F || strcmp (name, "56"))
 126       {
 127         fputs ("test failed!\n", stdout);
 128         result = 1;
 129       }
 130   }
 131   fprintf (out, "Residual: \"%s\"\n", fgets (buf, sizeof (buf), in));
 132   if (strcmp (buf, "a72\n"))
 133     {
 134       fputs ("test failed!\n", stdout);
 135       result = 1;
 136     }
 137   fputs ("Test 3:\n", out);
 138   {
 139     static struct {
 140       int count;
 141       float quant;
 142       const char *units;
 143       const char *item;
 144     } ok[] = {
 145       { 3, 2.0F, "quarts", "oil" },
 146       { 2, -12.8F, "degrees", "" },
 147       { 0, 0.0F, "", "" },
 148       { 3, 10.0F, "LBS", "fertilizer" },
 149       { 3, 100.0F, "rgs", "energy" },
 150       { -1, 0.0F, "", "" }};
 151     size_t rounds = 0;
 152     float quant;
 153     char units[21], item[21];
 154     while (!feof (in) && !ferror (in))
 155       {
 156         int count;
 157
 158         if (rounds++ >= array_length (ok))
 159           {
 160             fputs ("test failed!\n", stdout);
 161             result = 1;
 162           }
 163
 164         quant = 0.0;
 165         units[0] = item[0] = '\0';
 166         count = fscanf (in, "%f%20s of %20s", &quant, units, item);
 167         (void) fscanf (in, "%*[^\n]");
 168         fprintf (out, "count = %d, quant = %f, item = %.21s, units = %.21s\n",
 169                  count, quant, item, units);
 170         if (count != ok[rounds-1].count || quant != ok[rounds-1].quant
 171             || strcmp (item, ok[rounds-1].item)
 172             || strcmp (units, ok[rounds-1].units))
 173           {
 174             fputs ("test failed!\n", stdout);
 175             result = 1;
 176           }
 177       }
 178   }
 179   buf[0] = '\0';
 180   fprintf (out, "Residual: \"%s\"\n", fgets (buf, sizeof (buf), in));
 181   if (strcmp (buf, ""))
 182     {
 183       fputs ("test failed!\n", stdout);
 184       result = 1;
 185     }
 186
 187   if (out != stdout)
 188     pclose (out);
 189
 190   fputs ("Test 4:\n", out);
 191   {
 192     int res, val, n;
 193
 194     res = sscanf ("-242", "%3o%n", &val, &n);
 195     printf ("res = %d, val = %d, n = %d\n", res, val, n);
 196     if (res != 1 || val != -20 || n != 3)
 197       {
 198         fputs ("test failed!\n", stdout);
 199         result = 1;
 200       }
 201   }
 202
 203   fputs ("Test 5:\n", out);
 204   {
 205     double a = 0, b = 0;
 206     int res, n;
 207
 208     res = sscanf ("1234567", "%3lg%3lg%n", &a, &b, &n);
 209     printf ("res = %d, a = %g, b = %g, n = %d\n", res, a, b, n);
 210
 211     if (res != 2 || a != 123 || b != 456 || n != 6)
 212       {
 213         fputs ("test failed!\n", stdout);
 214         result = 1;
 215       }
 216
 217     res = sscanf ("0", "%lg", &a);
 218     printf ("res = %d, a = %g\n", res, a);
 219
 220     if (res != 1 || a != 0)
 221       {
 222         fputs ("test failed!\n", stdout);
 223         result = 1;
 224       }
 225
 226     res = sscanf ("1e3", "%lg%n", &a, &n);
 227     printf ("res = %d, a = %g, n = %d\n", res, a, n);
 228
 229     if (res != 1 || a != 1000 || n != 3)
 230       {
 231         fputs ("test failed!\n", stdout);
 232         result = 1;
 233       }
 234   }
 235
 236   fputs ("Test 6:\n", stdout);
 237   {
 238     char *p = (char *) -1;
 239     int res;
 240
 241     sprintf (buf, "%p", NULL);
 242     res = sscanf (buf, "%p", &p);
 243     printf ("sscanf (\"%s\", \"%%p\", &p) = %d, p == %p\n", buf, res, p);
 244
 245     if (res != 1 || p != NULL)
 246       {
 247         fputs ("test failed!\n", stdout);
 248         result = 1;
 249       }
 250   }
 251
 252   fputs ("Test 7:\n", stdout);
 253   {
 254     short a[2] = { -1, -1 };
 255     int res;
 256
 257     res = sscanf ("32767 1234", "%hd %hd", &a[0], &a[1]);
 258     printf ("res = %d, a[0] = %d, a[1] = %d\n", res, a[0], a[1]);
 259
 260     if (res != 2 || a[0] != 32767 || a[1] != 1234)
 261       {
 262         fputs ("test failed!\n", stdout);
 263         result = 1;
 264       }
 265   }
 266
 267   fputs ("Test 8:\n", stdout);
 268   {
 269     double d = 123456.789;
 270     int res;
 271
 272     res = sscanf ("0x1234", "%lf", &d);
 273     printf ("res = %d, d = %f\n", res, d);
 274
 275     if (res != 1 || d != 4660)
 276       {
 277         fputs ("test failed!\n", stdout);
 278         result = 1;
 279       }
 280   }
 281
 282   fputs ("Test 9:\n", stdout);
 283   {
 284     /* From PR libc/1313 reported by Ben Caradoc-Davies <bmcd@physics.otago.ac.nz>.  */
 285     float value;
 286     int res;
 287
 288     res = sscanf ("0123", "%2f", &value);
 289     if (res != 1 || value != 1.0)
 290       {
 291         fputs ("test failed!\n", stdout);
 292         result = 1;
 293       }
 294   }
 295
 296   fputs ("Test 10:\n", stdout);
 297   {
 298     float value;
 299     int res;
 300
 301     res = sscanf ("--", "%f", &value);
 302     if (res != 0)
 303       {
 304         fputs ("test failed!\n", stdout);
 305         result = 1;
 306       }
 307   }
 308
 309   fputs ("Test 11:\n", stdout);
 310   {
 311     char uart[50];
 312     int res;
 313
 314     res = sscanf ("uart:16550A tx:0", "uart:%31s tx:%*u", uart);
 315     if (res != 1)
 316       {
 317         fputs ("test failed!\n", stdout);
 318         result = 1;
 319       }
 320   }
 321
 322   fputs ("Test 12:\n", stdout);
 323   {
 324     char uart[50];
 325     int res;
 326
 327     res = sscanf ("uart:16550A", "uart:%31s tx:%*u", uart);
 328     if (res != 1)
 329       {
 330         fputs ("test failed!\n", stdout);
 331         result = 1;
 332       }
 333   }
 334
 335   fputs ("Test 13:\n", stdout);
 336   {
 337     float value;
 338     int res;
 339
 340     res = sscanf ("-InF", "%f", &value);
 341     if (res != 1 || isinf (value) != -1)
 342       {
 343         fputs ("test failed!\n", stdout);
 344         result = 1;
 345       }
 346
 347     res = sscanf ("+InfiNiTY", "%f", &value);
 348     if (res != 1 || isinf (value) != 1)
 349       {
 350         fputs ("test failed!\n", stdout);
 351         result = 1;
 352       }
 353   }
 354
 355   return result;
 356 }