Drizzled Public API Documentation

mi_info.cc
1 /* Copyright (C) 2000-2001, 2003-2004 MySQL AB
2 
3  This program is free software; you can redistribute it and/or modify
4  it under the terms of the GNU General Public License as published by
5  the Free Software Foundation; version 2 of the License.
6 
7  This program is distributed in the hope that it will be useful,
8  but WITHOUT ANY WARRANTY; without even the implied warranty of
9  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10  GNU General Public License for more details.
11 
12  You should have received a copy of the GNU General Public License
13  along with this program; if not, write to the Free Software
14  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
15 
16 /* Return useful base information for an open table */
17 
18 #include "myisam_priv.h"
19 #include <sys/stat.h>
20 #include <drizzled/error.h>
21 
22 using namespace drizzled;
23 
24  /* Get position to last record */
25 
26 internal::my_off_t mi_position(MI_INFO *info)
27 {
28  return info->lastpos;
29 }
30 
31 
32 /* Get information about the table */
33 /* if flag == 2 one get current info (no sync from database */
34 
35 int mi_status(MI_INFO *info, register MI_ISAMINFO *x, uint32_t flag)
36 {
37  struct stat state;
38  MYISAM_SHARE *share=info->s;
39 
40  x->recpos = info->lastpos;
41  if (flag == HA_STATUS_POS)
42  return(0); /* Compatible with ISAM */
43  if (!(flag & HA_STATUS_NO_LOCK))
44  {
45  _mi_readinfo(info,F_RDLCK,0);
46  fast_mi_writeinfo(info);
47  }
48  if (flag & HA_STATUS_VARIABLE)
49  {
50  x->records = info->state->records;
51  x->deleted = info->state->del;
52  x->delete_length = info->state->empty;
53  x->data_file_length =info->state->data_file_length;
54  x->index_file_length=info->state->key_file_length;
55 
56  x->keys = share->state.header.keys;
57  x->check_time = share->state.check_time;
58  x->mean_reclength= x->records ?
59  (uint32_t) ((x->data_file_length - x->delete_length) / x->records) :
60  (uint32_t) share->min_pack_length;
61  }
62  if (flag & HA_STATUS_ERRKEY)
63  {
64  x->errkey = info->errkey;
65  x->dupp_key_pos= info->dupp_key_pos;
66  }
67  if (flag & HA_STATUS_CONST)
68  {
69  x->reclength = share->base.reclength;
70  x->max_data_file_length=share->base.max_data_file_length;
71  x->max_index_file_length=info->s->base.max_key_file_length;
72  x->filenr = info->dfile;
73  x->options = share->options;
74  x->create_time=share->state.create_time;
75  x->reflength= mi_get_pointer_length(share->base.max_data_file_length, data_pointer_size);
76  x->record_offset= ((share->options &
77  (HA_OPTION_PACK_RECORD | HA_OPTION_COMPRESS_RECORD)) ?
78  0L : share->base.pack_reclength);
79  x->sortkey= -1; /* No clustering */
80  x->rec_per_key = share->state.rec_per_key_part;
81  x->key_map = share->state.key_map;
82  x->data_file_name = share->data_file_name;
83  x->index_file_name = share->index_file_name;
84  }
85  if ((flag & HA_STATUS_TIME) && !fstat(info->dfile,&state))
86  x->update_time=state.st_mtime;
87  else
88  x->update_time=0;
89  if (flag & HA_STATUS_AUTO)
90  {
91  x->auto_increment= share->state.auto_increment+1;
92  if (!x->auto_increment) /* This shouldn't happen */
93  x->auto_increment= ~(uint64_t) 0;
94  }
95  return(0);
96 }
97 
98 
99 /*
100  Write a message to the error log.
101 
102  SYNOPSIS
103  mi_report_error()
104  file_name Name of table file (e.g. index_file_name).
105  errcode Error number.
106 
107  DESCRIPTION
108  This function supplies my_error() with a table name. Most error
109  messages need one. Since string arguments in error messages are limited
110  to 64 characters by convention, we ensure that in case of truncation,
111  that the end of the index file path is in the message. This contains
112  the most valuable information (the table name and the database name).
113 
114  RETURN
115  void
116 */
117 
118 void mi_report_error(int errcode, const char *file_name)
119 {
120  mi_report_error(errcode, file_name);
121 }
122 
123 void mi_report_error(drizzled::error_t errcode, const char *file_name)
124 {
125  size_t lgt;
126 
127  if ((lgt= strlen(file_name)) > 64)
128  file_name+= lgt - 64;
129  my_error(errcode, MYF(ME_NOREFRESH), file_name);
130 }
131