aboutsummaryrefslogtreecommitdiff
path: root/src/gdbmimp.c
blob: 3b4fdccbe552fc77dadecf626145e0856432a4e7 (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
/* gdbmimp.c - Import a GDBM database. */

/* This file is part of GDBM, the GNU data base manager.
   Copyright (C) 2007, 2011 Free Software Foundation, Inc.

   GDBM is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3, or (at your option)
   any later version.

   GDBM 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 General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with GDBM. If not, see <http://www.gnu.org/licenses/>.   */

# include "autoconf.h"
# include <arpa/inet.h>

# include "gdbmdefs.h"
# include "gdbm.h"

int
gdbm_import_from_file (GDBM_FILE dbf, FILE *fp, int flag)
{
  int seenbang, seennewline, rsize, size, kbufsize, dbufsize, rret;
  int c;
  char *kbuffer, *dbuffer;
  datum key, data;
  int count = 0;

  seenbang = 0;
  seennewline = 0;
  kbuffer = NULL;
  dbuffer = NULL;

  /* Read (and discard) four lines begining with ! and ending with \n. */
  while (1)
    {
      if ((c = fgetc (fp)) == -1)
	goto read_fail;
      
      if (c == '!')
	seenbang++;
      if (c == '\n')
	{
	  if (seenbang > 3 && seennewline > 2)
	    {
	      /* End of last line. */
	      break;
	    }
	  seennewline++;
	}
    }

  /* Allocate buffers. */
  kbufsize = 512;
  kbuffer = malloc (kbufsize);
  if (kbuffer == NULL)
    {
      gdbm_errno = GDBM_MALLOC_ERROR;
      return -1;
    }
  dbufsize = 512;
  dbuffer = malloc (dbufsize);
  if (dbuffer == NULL)
    {
      free (kbuffer);
      gdbm_errno = GDBM_MALLOC_ERROR;
      return -1;
    }

  /* Insert/replace records in the database until we run out of file. */
  while ((rret = fread (&rsize, sizeof (rsize), 1, fp)) == 1)
    {
      /* Read the key. */
      size = ntohl (rsize);
      if (size > kbufsize)
	{
	  kbufsize = (size + 512);
	  kbuffer = realloc (kbuffer, kbufsize);
	  if (kbuffer == NULL)
	    {
	      free (dbuffer);
	      gdbm_errno = GDBM_MALLOC_ERROR;
	      return -1;
	    }
	}
      if (fread (kbuffer, size, 1, fp) != 1)
	goto read_fail;

      key.dptr = kbuffer;
      key.dsize = size;

      /* Read the data. */
      if (fread (&rsize, sizeof (rsize), 1, fp) != 1)
	goto read_fail;

      size = ntohl (rsize);
      if (size > dbufsize)
	{
	  dbufsize = (size + 512);
	  dbuffer = realloc (dbuffer, dbufsize);
	  if (dbuffer == NULL)
	    {
	      free (kbuffer);
	      gdbm_errno = GDBM_MALLOC_ERROR;
	      return -1;
	    }
	}
      if (fread (dbuffer, size, 1, fp) != 1)
	goto read_fail;

      data.dptr = dbuffer;
      data.dsize = size;

      if (gdbm_store (dbf, key, data, flag) != 0)
	{
	  /* Keep the existing errno. */
	  free (kbuffer);
	  free (dbuffer);
	  return -1;
	}

      count++;
    }

  if (rret == 0)
    return count;

read_fail:

  free (kbuffer);
  free (dbuffer);
  gdbm_errno = GDBM_FILE_READ_ERROR;
  return -1;
}

int
gdbm_import (GDBM_FILE dbf, const char *importfile, int flag)
{
  FILE *fp;
  int rc;
  
  fp = fopen (importfile, "r");
  if (!fp)
    {
      gdbm_errno = GDBM_FILE_OPEN_ERROR;
      return -1;
    }
  rc = gdbm_import_from_file (dbf, fp, flag);
  fclose (fp);
  return rc;
}

Return to:

Send suggestions and report system problems to the System administrator.