summaryrefslogtreecommitdiff
path: root/Build/source/libs/libpng/libpng-1.6.1/contrib/libtests/timepng.c
blob: 523627f3843c192ba8521e39f542db8a672a9877 (plain)
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
/* timepng.c
 *
 * Copyright (c) 2013 John Cunningham Bowler
 *
 * Last changed in libpng 1.6.1 [March 28, 2013]
 *
 * This code is released under the libpng license.
 * For conditions of distribution and use, see the disclaimer
 * and license in png.h
 *
 * Load an arbitrary number of PNG files (from the command line, or, if there
 * are no arguments on the command line, from stdin) then run a time test by
 * reading each file by row.  The test does nothing with the read result and
 * does no transforms.  The only output is a time as a floating point number of
 * seconds with 9 decimal digits.
 */
#define _POSIX_C_SOURCE 199309L /* for clock_gettime */

#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#include <time.h>

#if defined(HAVE_CONFIG_H) && !defined(PNG_NO_CONFIG_H)
#  include <config.h>
#endif

/* Define the following to use this test against your installed libpng, rather
 * than the one being built here:
 */
#ifdef PNG_FREESTANDING_TESTS
#  include <png.h>
#else
#  include "../../png.h"
#endif

static int read_png(FILE *fp)
{
   png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING,0,0,0);
   png_infop info_ptr = NULL;
   png_bytep row = NULL, display = NULL;

   if (png_ptr == NULL)
      return 0;

   if (setjmp(png_jmpbuf(png_ptr)))
   {
      png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
      if (row != NULL) free(row);
      if (display != NULL) free(display);
      return 0;
   }

   png_init_io(png_ptr, fp);

   info_ptr = png_create_info_struct(png_ptr);
   if (info_ptr == NULL)
      png_error(png_ptr, "OOM allocating info structure");

   png_read_info(png_ptr, info_ptr);

   {
      png_size_t rowbytes = png_get_rowbytes(png_ptr, info_ptr);

      row = malloc(rowbytes);
      display = malloc(rowbytes);

      if (row == NULL || display == NULL)
         png_error(png_ptr, "OOM allocating row buffers");

      {
         png_uint_32 height = png_get_image_height(png_ptr, info_ptr);
         int passes = png_set_interlace_handling(png_ptr);
         int pass;

         png_start_read_image(png_ptr);

         for (pass = 0; pass < passes; ++pass)
         {
            png_uint_32 y = height;

            /* NOTE: this trashes the row each time; interlace handling won't
             * work, but this avoids memory thrashing for speed testing.
             */
            while (y-- > 0)
               png_read_row(png_ptr, row, display);
         }
      }
   }

   /* Make sure to read to the end of the file: */
   png_read_end(png_ptr, info_ptr);
   png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
   free(row);
   free(display);
   return 1;
}

static int mytime(struct timespec *t)
{
   /* Do the timing using clock_gettime and the per-process timer. */
   if (!clock_gettime(CLOCK_PROCESS_CPUTIME_ID, t))
      return 1;

   perror("CLOCK_PROCESS_CPUTIME_ID");
   fprintf(stderr, "timepng: could not get the time\n");
   return 0;
}

static int perform_one_test(FILE *fp, int nfiles)
{
   int i;
   struct timespec before, after;

   /* Clear out all errors: */
   rewind(fp);

   if (mytime(&before))
   {
      for (i=0; i<nfiles; ++i)
      {
         if (read_png(fp))
         {
            if (ferror(fp))
            {
               perror("temporary file");
               fprintf(stderr, "file %d: error reading PNG data\n", i);
               return 0;
            }
         }

         else
         {
            perror("temporary file");
            fprintf(stderr, "file %d: error from libpng\n", i);
            return 0;
         }
      }
   }

   else
      return 0;

   if (mytime(&after))
   {
      /* Work out the time difference and print it - this is the only output,
       * so flush it immediately.
       */
      unsigned long s = after.tv_sec - before.tv_sec;
      long ns = after.tv_nsec - before.tv_nsec;

      if (ns < 0)
      {
         --s;
         ns += 1000000000;

         if (ns < 0)
         {
            fprintf(stderr, "timepng: bad clock from kernel\n");
            return 0;
         }
      }

      printf("%lu.%.9ld\n", s, ns);
      fflush(stdout);
      if (ferror(stdout))
      {
         fprintf(stderr, "timepng: error writing output\n");
         return 0;
      }

      /* Successful return */
      return 1;
   }

   else
      return 0;
}

static int add_one_file(FILE *fp, char *name)
{
   FILE *ip = fopen(name, "rb");

   if (ip != NULL)
   {
      int ch;
      for (;;)
      {
         ch = getc(ip);
         if (ch == EOF) break;
         putc(ch, fp);
      }

      if (ferror(ip))
      {
         perror(name);
         fprintf(stderr, "%s: read error\n", name);
         return 0;
      }

      (void)fclose(ip);

      if (ferror(fp))
      {
         perror("temporary file");
         fprintf(stderr, "temporary file write error\n");
         return 0;
      }
   }

   else
   {
      perror(name);
      fprintf(stderr, "%s: open failed\n", name);
      return 0;
   }

   return 1;
}

int main(int argc, char **argv)
{
   int ok = 0;
   FILE *fp = tmpfile();

   if (fp != NULL)
   {
      int err = 0;
      int nfiles = 0;

      if (argc > 1)
      {
         int i;

         for (i=1; i<argc; ++i)
         {
            if (add_one_file(fp, argv[i]))
               ++nfiles;

            else
            {
               err = 1;
               break;
            }
         }
      }

      else
      {
         char filename[FILENAME_MAX+1];

         while (fgets(filename, FILENAME_MAX+1, stdin))
         {
            int len = strlen(filename);

            if (filename[len-1] == '\n')
            {
               filename[len-1] = 0;
               if (add_one_file(fp, filename))
                  ++nfiles;

               else
               {
                  err = 1;
                  break;
               }
            }

            else
            {
               fprintf(stderr, "timepng: truncated file name ...%s\n",
                  filename+len-32);
               err = 1;
               break;
            }
         }

         if (ferror(stdin))
         {
            fprintf(stderr, "timepng: stdin: read error\n");
            err = 1;
         }
      }

      if (!err)
      {
         if (nfiles > 0)
            ok = perform_one_test(fp, nfiles);

         else
            fprintf(stderr, "usage: timepng {files} or ls files | timepng\n");
      }

      (void)fclose(fp);
   }

   else
      fprintf(stderr, "timepng: could not open temporary file\n");

   /* Exit code 0 on success. */
   return ok == 0;
}