1
/* Copyright (C) 2000 MySQL AB
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.
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.
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
16
#include "mysys_priv.h"
17
#include <drizzled/gettext.h>
18
#include "mysys_err.h"
19
#include <mystrings/m_string.h>
21
#include <mystrings/m_ctype.h>
23
/* Define some external variables for error handling */
27
my_error family functions have to be used according following rules:
28
- if message have not parameters use my_message(ER_CODE, ER(ER_CODE), MYF(N))
29
- if message registered use my_error(ER_CODE, MYF(N), ...).
30
- With some special text of errror message use:
31
my_printf_error(ER_CODE, format, MYF(N), ...)
34
char errbuff[NRERRBUFFS][ERRMSGSIZE];
37
Message texts are registered into a linked list of 'my_err_head' structs.
38
Each struct contains (1.) an array of pointers to C character strings with
39
'\0' termination, (2.) the error number for the first message in the array
40
(array index 0) and (3.) the error number for the last message in the array
41
(array index (last - first)).
42
The array may contain gaps with NULL pointers and pointers to empty strings.
43
Both kinds of gaps will be translated to "Unknown error %d.", if my_error()
44
is called with a respective error number.
45
The list of header structs is sorted in increasing order of error numbers.
46
Negative error numbers are allowed. Overlap of error numbers is not allowed.
47
Not registered error numbers will be translated to "Unknown error %d.".
49
static struct my_err_head
51
struct my_err_head *meh_next; /* chain link */
52
const char **meh_errmsgs; /* error messages array */
53
int meh_first; /* error number matching array slot 0 */
54
int meh_last; /* error number matching last slot */
56
} my_errmsgs_globerrs = {NULL, globerrs, EE_ERROR_FIRST, EE_ERROR_LAST, true};
58
static struct my_err_head *my_errmsgs_list= &my_errmsgs_globerrs;
71
void my_error(int nr, myf MyFlags, ...)
74
struct my_err_head *meh_p;
76
char ebuff[ERRMSGSIZE + 20];
78
/* Search for the error messages array, which could contain the message. */
79
for (meh_p= my_errmsgs_list; meh_p; meh_p= meh_p->meh_next)
80
if (nr <= meh_p->meh_last)
83
/* get the error message string. Default, if NULL or empty string (""). */
84
if (! (format= (meh_p && (nr >= meh_p->meh_first)) ?
85
_(meh_p->meh_errmsgs[nr - meh_p->meh_first]) : NULL) || ! *format)
86
(void) snprintf (ebuff, sizeof(ebuff), _("Unknown error %d"), nr);
89
va_start(args,MyFlags);
90
(void) vsnprintf (ebuff, sizeof(ebuff), format, args);
93
(*error_handler_hook)(nr, ebuff, MyFlags);
109
void my_printf_error(uint32_t error, const char *format, myf MyFlags, ...)
112
char ebuff[ERRMSGSIZE+20];
114
va_start(args,MyFlags);
115
(void) vsnprintf (ebuff, sizeof(ebuff), format, args);
117
(*error_handler_hook)(error, ebuff, MyFlags);
122
Give message using error_handler_hook
131
void my_message(uint32_t error, const char *str, register myf MyFlags)
133
(*error_handler_hook)(error, str, MyFlags);
138
Register error messages for use with my_error().
142
errmsgs array of pointers to error messages
143
first error number of first message in the array
144
last error number of last message in the array
147
The pointer array is expected to contain addresses to NUL-terminated
148
C character strings. The array contains (last - first + 1) pointers.
149
NULL pointers and empty strings ("") are allowed. These will be mapped to
150
"Unknown error" when my_error() is called with a matching error number.
151
This function registers the error numbers 'first' to 'last'.
152
No overlapping with previously registered error numbers is allowed.
159
int my_error_register(const char **errmsgs, int first, int last)
161
struct my_err_head *meh_p;
162
struct my_err_head **search_meh_pp;
164
/* Allocate a new header structure. */
165
if (! (meh_p= (struct my_err_head*) my_malloc(sizeof(struct my_err_head),
168
meh_p->meh_errmsgs= errmsgs;
169
meh_p->meh_first= first;
170
meh_p->meh_last= last;
171
meh_p->is_globerrs= false;
173
/* Search for the right position in the list. */
174
for (search_meh_pp= &my_errmsgs_list;
176
search_meh_pp= &(*search_meh_pp)->meh_next)
178
if ((*search_meh_pp)->meh_last > first)
182
/* Error numbers must be unique. No overlapping is allowed. */
183
if (*search_meh_pp && ((*search_meh_pp)->meh_first <= last))
185
free((unsigned char*)meh_p);
189
/* Insert header into the chain. */
190
meh_p->meh_next= *search_meh_pp;
191
*search_meh_pp= meh_p;
197
Unregister formerly registered error messages.
200
my_error_unregister()
201
first error number of first message
202
last error number of last message
205
This function unregisters the error numbers 'first' to 'last'.
206
These must have been previously registered by my_error_register().
207
'first' and 'last' must exactly match the registration.
208
If a matching registration is present, the header is removed from the
209
list and the pointer to the error messages pointers array is returned.
210
Otherwise, NULL is returned.
213
non-NULL OK, returns address of error messages pointers array.
214
NULL Error, no such number range registered.
217
const char **my_error_unregister(int first, int last)
219
struct my_err_head *meh_p;
220
struct my_err_head **search_meh_pp;
221
const char **errmsgs;
223
/* Search for the registration in the list. */
224
for (search_meh_pp= &my_errmsgs_list;
226
search_meh_pp= &(*search_meh_pp)->meh_next)
228
if (((*search_meh_pp)->meh_first == first) &&
229
((*search_meh_pp)->meh_last == last))
232
if (! *search_meh_pp)
235
/* Remove header from the chain. */
236
meh_p= *search_meh_pp;
237
*search_meh_pp= meh_p->meh_next;
239
/* Save the return value and free the header. */
240
errmsgs= meh_p->meh_errmsgs;
241
bool is_globerrs= meh_p->is_globerrs;
243
free((unsigned char*) meh_p);
252
void my_error_unregister_all(void)
254
struct my_err_head *list, *next;
255
for (list= my_errmsgs_globerrs.meh_next; list; list= next)
257
next= list->meh_next;
258
free((unsigned char*) list);
260
my_errmsgs_list= &my_errmsgs_globerrs;