about summary refs log tree commit diff
path: root/stdio-common/tst-printf.c
blob: 2c4624cd4218452d6cb37983a416571f43d6b1d2 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
/* Copyright (C) 1991-2021 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <https://www.gnu.org/licenses/>.  */

#ifdef	BSD
#include </usr/include/stdio.h>
#define EXIT_SUCCESS 0
#else
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#endif

#include <float.h>
#include <libc-diag.h>

/* This whole file is picayune tests of corner cases of printf format strings.
   The compiler warnings are not useful here.  */
DIAG_IGNORE_NEEDS_COMMENT (4.9, "-Wformat");

#if __GNUC_PREREQ (7, 0)
/* Compiler warnings about snprintf output truncation should also be
   ignored.  */
DIAG_IGNORE_NEEDS_COMMENT (7.0, "-Wformat-truncation");
#endif

static void rfg1 (void);
static void rfg2 (void);
static void rfg3 (void);


static void
fmtchk (const char *fmt)
{
  (void) fputs(fmt, stdout);
  (void) printf(":\t`");
  (void) printf(fmt, 0x12);
  (void) printf("'\n");
}

static void
fmtst1chk (const char *fmt)
{
  (void) fputs(fmt, stdout);
  (void) printf(":\t`");
  (void) printf(fmt, 4, 0x12);
  (void) printf("'\n");
}

static void
fmtst2chk (const char *fmt)
{
  (void) fputs(fmt, stdout);
  (void) printf(":\t`");
  (void) printf(fmt, 4, 4, 0x12);
  (void) printf("'\n");
}

static int
do_test (void)
{
  static char shortstr[] = "Hi, Z.";
  static char longstr[] = "Good morning, Doctor Chandra.  This is Hal.  \
I am ready for my first lesson today.";
  int result = 0;

  fmtchk("%.4x");
  fmtchk("%04x");
  fmtchk("%4.4x");
  fmtchk("%04.4x");
  fmtchk("%4.3x");
  fmtchk("%04.3x");

  fmtst1chk("%.*x");
  fmtst1chk("%0*x");
  fmtst2chk("%*.*x");
  fmtst2chk("%0*.*x");

#ifndef	BSD
  printf("bad format:\t\"%b\"\n");
  printf("nil pointer (padded):\t\"%10p\"\n", (void *) NULL);
#endif

  printf("decimal negative:\t\"%d\"\n", -2345);
  printf("octal negative:\t\"%o\"\n", -2345);
  printf("hex negative:\t\"%x\"\n", -2345);
  printf("long decimal number:\t\"%ld\"\n", -123456L);
  printf("long octal negative:\t\"%lo\"\n", -2345L);
  printf("long unsigned decimal number:\t\"%lu\"\n", -123456L);
  printf("zero-padded LDN:\t\"%010ld\"\n", -123456L);
  printf("left-adjusted ZLDN:\t\"%-010ld\"\n", -123456L);
  printf("space-padded LDN:\t\"%10ld\"\n", -123456L);
  printf("left-adjusted SLDN:\t\"%-10ld\"\n", -123456L);

  printf("zero-padded string:\t\"%010s\"\n", shortstr);
  printf("left-adjusted Z string:\t\"%-010s\"\n", shortstr);
  printf("space-padded string:\t\"%10s\"\n", shortstr);
  printf("left-adjusted S string:\t\"%-10s\"\n", shortstr);
  /* GCC 9 warns about the NULL format argument; this is deliberately
     tested here.  */
  DIAG_PUSH_NEEDS_COMMENT;
#if __GNUC_PREREQ (7, 0)
  DIAG_IGNORE_NEEDS_COMMENT (9, "-Wformat-overflow=");
#endif
  printf("null string:\t\"%s\"\n", (char *)NULL);
  DIAG_POP_NEEDS_COMMENT;
  printf("limited string:\t\"%.22s\"\n", longstr);

  printf("a-style max:\t\"%a\"\n", DBL_MAX);
  printf("a-style -max:\t\"%a\"\n", -DBL_MAX);
  printf("e-style >= 1:\t\"%e\"\n", 12.34);
  printf("e-style >= .1:\t\"%e\"\n", 0.1234);
  printf("e-style < .1:\t\"%e\"\n", 0.001234);
  printf("e-style big:\t\"%.60e\"\n", 1e20);
  printf ("e-style == .1:\t\"%e\"\n", 0.1);
  printf("f-style >= 1:\t\"%f\"\n", 12.34);
  printf("f-style >= .1:\t\"%f\"\n", 0.1234);
  printf("f-style < .1:\t\"%f\"\n", 0.001234);
  printf("g-style >= 1:\t\"%g\"\n", 12.34);
  printf("g-style >= .1:\t\"%g\"\n", 0.1234);
  printf("g-style < .1:\t\"%g\"\n", 0.001234);
  printf("g-style big:\t\"%.60g\"\n", 1e20);

  printf (" %6.5f\n", .099999999860301614);
  printf (" %6.5f\n", .1);
  printf ("x%5.4fx\n", .5);

  printf ("%#03x\n", 1);

  printf ("something really insane: %.10000f\n", 1.0);

  {
    double d = FLT_MIN;
    int niter = 17;

    while (niter-- != 0)
      printf ("%.17e\n", d / 2);
    fflush (stdout);
  }

  printf ("%15.5e\n", 4.9406564584124654e-324);

#define FORMAT "|%12.4f|%12.4e|%12.4g|\n"
  printf (FORMAT, 0.0, 0.0, 0.0);
  printf (FORMAT, 1.0, 1.0, 1.0);
  printf (FORMAT, -1.0, -1.0, -1.0);
  printf (FORMAT, 100.0, 100.0, 100.0);
  printf (FORMAT, 1000.0, 1000.0, 1000.0);
  printf (FORMAT, 10000.0, 10000.0, 10000.0);
  printf (FORMAT, 12345.0, 12345.0, 12345.0);
  printf (FORMAT, 100000.0, 100000.0, 100000.0);
  printf (FORMAT, 123456.0, 123456.0, 123456.0);
#undef	FORMAT

  {
    char buf[20];
    char buf2[512];
    printf ("snprintf (\"%%30s\", \"foo\") == %d, \"%.*s\"\n",
	    snprintf (buf, sizeof (buf), "%30s", "foo"), (int) sizeof (buf),
	    buf);
    printf ("snprintf (\"%%.999999u\", 10) == %d\n",
	    snprintf (buf2, sizeof (buf2), "%.999999u", 10));
  }

  printf("%.8f\n", DBL_MAX);
  printf("%.8f\n", -DBL_MAX);
  printf ("%e should be 1.234568e+06\n", 1234567.8);
  printf ("%f should be 1234567.800000\n", 1234567.8);
  printf ("%g should be 1.23457e+06\n", 1234567.8);
  printf ("%g should be 123.456\n", 123.456);
  printf ("%g should be 1e+06\n", 1000000.0);
  printf ("%g should be 10\n", 10.0);
  printf ("%g should be 0.02\n", 0.02);

#if 0
  /* This test rather checks the way the compiler handles constant
     folding.  gcc behavior wrt to this changed in 3.2 so it is not a
     portable test.  */
  {
    double x=1.0;
    printf("%.17f\n",(1.0/x/10.0+1.0)*x-x);
  }
#endif

  {
    char buf[200];

    sprintf(buf,"%*s%*s%*s",-1,"one",-20,"two",-30,"three");

    result |= strcmp (buf,
		      "onetwo                 three                         ");

    puts (result != 0 ? "Test failed!" : "Test ok.");
  }

  {
    char buf[200];

    sprintf (buf, "%07Lo", 040000000000ll);
    printf ("sprintf (buf, \"%%07Lo\", 040000000000ll) = %s", buf);

    if (strcmp (buf, "40000000000") != 0)
      {
	result = 1;
	fputs ("\tFAILED", stdout);
      }
    puts ("");
  }

  printf ("printf (\"%%hhu\", %u) = %hhu\n", UCHAR_MAX + 2, UCHAR_MAX + 2);
  printf ("printf (\"%%hu\", %u) = %hu\n", USHRT_MAX + 2, USHRT_MAX + 2);
  printf ("printf (\"%%hhi\", %i) = %hhi\n", UCHAR_MAX + 2, UCHAR_MAX + 2);
  printf ("printf (\"%%hi\", %i) = %hi\n", USHRT_MAX + 2, USHRT_MAX + 2);

  printf ("printf (\"%%1$hhu\", %2$u) = %1$hhu\n",
	  UCHAR_MAX + 2, UCHAR_MAX + 2);
  printf ("printf (\"%%1$hu\", %2$u) = %1$hu\n", USHRT_MAX + 2, USHRT_MAX + 2);
  printf ("printf (\"%%1$hhi\", %2$i) = %1$hhi\n",
	  UCHAR_MAX + 2, UCHAR_MAX + 2);
  printf ("printf (\"%%1$hi\", %2$i) = %1$hi\n", USHRT_MAX + 2, USHRT_MAX + 2);

  puts ("--- Should be no further output. ---");
  rfg1 ();
  rfg2 ();
  rfg3 ();

  {
    char bytes[7];
    char buf[20];

    memset (bytes, '\xff', sizeof bytes);
    sprintf (buf, "foo%hhn\n", &bytes[3]);
    if (bytes[0] != '\xff' || bytes[1] != '\xff' || bytes[2] != '\xff'
	|| bytes[4] != '\xff' || bytes[5] != '\xff' || bytes[6] != '\xff')
      {
	puts ("%hhn overwrite more bytes");
	result = 1;
      }
    if (bytes[3] != 3)
      {
	puts ("%hhn wrote incorrect value");
	result = 1;
      }
  }

  return result != 0;
}

static void
rfg1 (void)
{
  char buf[100];

  sprintf (buf, "%5.s", "xyz");
  if (strcmp (buf, "     ") != 0)
    printf ("got: '%s', expected: '%s'\n", buf, "     ");
  sprintf (buf, "%5.f", 33.3);
  if (strcmp (buf, "   33") != 0)
    printf ("got: '%s', expected: '%s'\n", buf, "   33");
  sprintf (buf, "%8.e", 33.3e7);
  if (strcmp (buf, "   3e+08") != 0)
    printf ("got: '%s', expected: '%s'\n", buf, "   3e+08");
  sprintf (buf, "%8.E", 33.3e7);
  if (strcmp (buf, "   3E+08") != 0)
    printf ("got: '%s', expected: '%s'\n", buf, "   3E+08");
  sprintf (buf, "%.g", 33.3);
  if (strcmp (buf, "3e+01") != 0)
    printf ("got: '%s', expected: '%s'\n", buf, "3e+01");
  sprintf (buf, "%.G", 33.3);
  if (strcmp (buf, "3E+01") != 0)
    printf ("got: '%s', expected: '%s'\n", buf, "3E+01");
}

static void
rfg2 (void)
{
  int prec;
  char buf[100];

  prec = 0;
  sprintf (buf, "%.*g", prec, 3.3);
  if (strcmp (buf, "3") != 0)
    printf ("got: '%s', expected: '%s'\n", buf, "3");
  prec = 0;
  sprintf (buf, "%.*G", prec, 3.3);
  if (strcmp (buf, "3") != 0)
    printf ("got: '%s', expected: '%s'\n", buf, "3");
  prec = 0;
  sprintf (buf, "%7.*G", prec, 3.33);
  if (strcmp (buf, "      3") != 0)
    printf ("got: '%s', expected: '%s'\n", buf, "      3");
  prec = 3;
  sprintf (buf, "%04.*o", prec, 33);
  if (strcmp (buf, " 041") != 0)
    printf ("got: '%s', expected: '%s'\n", buf, " 041");
  prec = 7;
  sprintf (buf, "%09.*u", prec, 33);
  if (strcmp (buf, "  0000033") != 0)
    printf ("got: '%s', expected: '%s'\n", buf, "  0000033");
  prec = 3;
  sprintf (buf, "%04.*x", prec, 33);
  if (strcmp (buf, " 021") != 0)
    printf ("got: '%s', expected: '%s'\n", buf, " 021");
  prec = 3;
  sprintf (buf, "%04.*X", prec, 33);
  if (strcmp (buf, " 021") != 0)
    printf ("got: '%s', expected: '%s'\n", buf, " 021");
}

static void
rfg3 (void)
{
  char buf[100];
  double g = 5.0000001;
  unsigned long l = 1234567890;
  double d = 321.7654321;
  const char s[] = "test-string";
  int i = 12345;
  int h = 1234;

  sprintf (buf,
	   "%1$*5$d %2$*6$hi %3$*7$lo %4$*8$f %9$*12$e %10$*13$g %11$*14$s",
	   i, h, l, d, 8, 5, 14, 14, d, g, s, 14, 3, 14);
  if (strcmp (buf,
	      "   12345  1234    11145401322     321.765432   3.217654e+02   5    test-string") != 0)
    printf ("got: '%s', expected: '%s'\n", buf,
	    "   12345  1234    11145401322     321.765432   3.217654e+02   5    test-string");
}

#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"