summaryrefslogtreecommitdiff
path: root/tools/apultra/src/libdivsufsort/examples/mksary.c
blob: b48177cf8e9544e90ecbde2ede67016e09a12906 (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
/*
 * mksary.c for libdivsufsort
 * Copyright (c) 2003-2008 Yuta Mori All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following
 * conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

#if HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdio.h>
#if HAVE_STRING_H
# include <string.h>
#endif
#if HAVE_STDLIB_H
# include <stdlib.h>
#endif
#if HAVE_MEMORY_H
# include <memory.h>
#endif
#if HAVE_STDDEF_H
# include <stddef.h>
#endif
#if HAVE_STRINGS_H
# include <strings.h>
#endif
#if HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#if HAVE_IO_H && HAVE_FCNTL_H
# include <io.h>
# include <fcntl.h>
#endif
#include <time.h>
#include <divsufsort.h>
#include "lfs.h"


static
void
print_help(const char *progname, int status) {
  fprintf(stderr,
          "mksary, a simple suffix array builder, version %s.\n",
          divsufsort_version());
  fprintf(stderr, "usage: %s INFILE OUTFILE\n\n", progname);
  exit(status);
}

int
main(int argc, const char *argv[]) {
  FILE *fp, *ofp;
  const char *fname, *ofname;
  sauchar_t *T;
  saidx_t *SA;
  LFS_OFF_T n;
  clock_t start, finish;
  saint_t needclose = 3;

  /* Check arguments. */
  if((argc == 1) ||
     (strcmp(argv[1], "-h") == 0) ||
     (strcmp(argv[1], "--help") == 0)) { print_help(argv[0], EXIT_SUCCESS); }
  if(argc != 3) { print_help(argv[0], EXIT_FAILURE); }

  /* Open a file for reading. */
  if(strcmp(argv[1], "-") != 0) {
#if HAVE_FOPEN_S
    if(fopen_s(&fp, fname = argv[1], "rb") != 0) {
#else
    if((fp = LFS_FOPEN(fname = argv[1], "rb")) == NULL) {
#endif
      fprintf(stderr, "%s: Cannot open file `%s': ", argv[0], fname);
      perror(NULL);
      exit(EXIT_FAILURE);
    }
  } else {
#if HAVE__SETMODE && HAVE__FILENO
    if(_setmode(_fileno(stdin), _O_BINARY) == -1) {
      fprintf(stderr, "%s: Cannot set mode: ", argv[0]);
      perror(NULL);
      exit(EXIT_FAILURE);
    }
#endif
    fp = stdin;
    fname = "stdin";
    needclose ^= 1;
  }

  /* Open a file for writing. */
  if(strcmp(argv[2], "-") != 0) {
#if HAVE_FOPEN_S
    if(fopen_s(&ofp, ofname = argv[2], "wb") != 0) {
#else
    if((ofp = LFS_FOPEN(ofname = argv[2], "wb")) == NULL) {
#endif
      fprintf(stderr, "%s: Cannot open file `%s': ", argv[0], ofname);
      perror(NULL);
      exit(EXIT_FAILURE);
    }
  } else {
#if HAVE__SETMODE && HAVE__FILENO
    if(_setmode(_fileno(stdout), _O_BINARY) == -1) {
      fprintf(stderr, "%s: Cannot set mode: ", argv[0]);
      perror(NULL);
      exit(EXIT_FAILURE);
    }
#endif
    ofp = stdout;
    ofname = "stdout";
    needclose ^= 2;
  }

  /* Get the file size. */
  if(LFS_FSEEK(fp, 0, SEEK_END) == 0) {
    n = LFS_FTELL(fp);
    rewind(fp);
    if(n < 0) {
      fprintf(stderr, "%s: Cannot ftell `%s': ", argv[0], fname);
      perror(NULL);
      exit(EXIT_FAILURE);
    }
    if(0x7fffffff <= n) {
      fprintf(stderr, "%s: Input file `%s' is too big.\n", argv[0], fname);
      exit(EXIT_FAILURE);
    }
  } else {
    fprintf(stderr, "%s: Cannot fseek `%s': ", argv[0], fname);
    perror(NULL);
    exit(EXIT_FAILURE);
  }

  /* Allocate 5blocksize bytes of memory. */
  T = (sauchar_t *)malloc((size_t)n * sizeof(sauchar_t));
  SA = (saidx_t *)malloc((size_t)n * sizeof(saidx_t));
  if((T == NULL) || (SA == NULL)) {
    fprintf(stderr, "%s: Cannot allocate memory.\n", argv[0]);
    exit(EXIT_FAILURE);
  }

  /* Read n bytes of data. */
  if(fread(T, sizeof(sauchar_t), (size_t)n, fp) != (size_t)n) {
    fprintf(stderr, "%s: %s `%s': ",
      argv[0],
      (ferror(fp) || !feof(fp)) ? "Cannot read from" : "Unexpected EOF in",
      fname);
    perror(NULL);
    exit(EXIT_FAILURE);
  }
  if(needclose & 1) { fclose(fp); }

  /* Construct the suffix array. */
  fprintf(stderr, "%s: %" PRIdOFF_T " bytes ... ", fname, n);
  start = clock();
  if(divsufsort(T, SA, (saidx_t)n) != 0) {
    fprintf(stderr, "%s: Cannot allocate memory.\n", argv[0]);
    exit(EXIT_FAILURE);
  }
  finish = clock();
  fprintf(stderr, "%.4f sec\n", (double)(finish - start) / (double)CLOCKS_PER_SEC);

  /* Write the suffix array. */
  if(fwrite(SA, sizeof(saidx_t), (size_t)n, ofp) != (size_t)n) {
    fprintf(stderr, "%s: Cannot write to `%s': ", argv[0], ofname);
    perror(NULL);
    exit(EXIT_FAILURE);
  }
  if(needclose & 2) { fclose(ofp); }

  /* Deallocate memory. */
  free(SA);
  free(T);

  return 0;
}