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
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
|
/* Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.
Copyright (c) 2009, 2013, Monty Program Ab.
This program 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; version 2 of the License.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */
/* Functions to handle typelib */
#include "mysys_priv.h"
#include <m_string.h>
#include <m_ctype.h>
#define is_field_separator(F, X) \
((F & FIND_TYPE_COMMA_TERM) && ((X) == ',' || (X) == '='))
int find_type_with_warning(const char *x, TYPELIB *typelib, const char *option)
{
int res;
const char **ptr;
if ((res= find_type((char *) x, typelib, FIND_TYPE_BASIC)) <= 0)
{
ptr= typelib->type_names;
if (!*x)
fprintf(stderr, "No option given to %s\n", option);
else
fprintf(stderr, "Unknown option to %s: %s\n", option, x);
fprintf(stderr, "Alternatives are: '%s'", *ptr);
while (*++ptr)
fprintf(stderr, ",'%s'", *ptr);
fprintf(stderr, "\n");
}
return res;
}
/**
Search after a string in a list of strings. Endspace in x is not compared.
@param x pointer to string to find
(not necessarily zero-terminated).
by return it'll be advanced to point to the terminator.
@param typelib TYPELIB (struct of pointer to values + count)
@param flags flags to tune behaviour: a combination of
FIND_TYPE_NO_PREFIX
FIND_TYPE_COMMA_TERM.
@param eol a pointer to the end of the string.
@retval
-1 Too many matching values
@retval
0 No matching value
@retval
>0 Offset+1 in typelib for matched string
*/
static int find_type_eol(const char **x, const TYPELIB *typelib, uint flags,
const char *eol)
{
int find,pos;
int UNINIT_VAR(findpos); /* guarded by find */
const char *UNINIT_VAR(termptr);
const char *i;
const char *j;
CHARSET_INFO *cs= &my_charset_latin1;
DBUG_ENTER("find_type_eol");
DBUG_PRINT("enter",("x: '%s' lib: %p", *x, typelib));
DBUG_ASSERT(!(flags & ~(FIND_TYPE_NO_PREFIX | FIND_TYPE_COMMA_TERM)));
if (!typelib->count)
{
DBUG_PRINT("exit",("no count"));
DBUG_RETURN(0);
}
find=0;
for (pos=0 ; (j=typelib->type_names[pos]) ; pos++)
{
for (i=*x ;
i < eol && !is_field_separator(flags, *i) &&
my_toupper(cs, *i) == my_toupper(cs, *j) ; i++, j++) ;
if (! *j)
{
while (i < eol && *i == ' ')
i++; /* skip_end_space */
if (i >= eol || is_field_separator(flags, *i))
{
*x= i;
DBUG_RETURN(pos+1);
}
}
if ((i >= eol && !is_field_separator(flags, *i)) &&
(!*j || !(flags & FIND_TYPE_NO_PREFIX)))
{
find++;
findpos=pos;
termptr=i;
}
}
if (find == 0 || *x == eol)
{
DBUG_PRINT("exit",("Couldn't find type"));
DBUG_RETURN(0);
}
else if (find != 1 || (flags & FIND_TYPE_NO_PREFIX))
{
DBUG_PRINT("exit",("Too many possibilities"));
DBUG_RETURN(-1);
}
*x= termptr;
DBUG_RETURN(findpos+1);
} /* find_type_eol */
/**
Search after a string in a list of strings. Endspace in x is not compared.
Same as find_type_eol, but for zero-terminated strings,
and without advancing the pointer.
*/
int find_type(const char *x, const TYPELIB *typelib, uint flags)
{
return find_type_eol(&x, typelib, flags, x + strlen(x));
}
/**
Get name of type nr
@note
first type is 1, 0 = empty field
*/
void make_type(register char * to, register uint nr,
register TYPELIB *typelib)
{
DBUG_ENTER("make_type");
if (!nr)
to[0]=0;
else
(void) strmov(to,get_type(typelib,nr-1));
DBUG_VOID_RETURN;
} /* make_type */
/**
Get type
@note
first type is 0
*/
const char *get_type(TYPELIB *typelib, uint nr)
{
if (nr < (uint) typelib->count && typelib->type_names)
return(typelib->type_names[nr]);
return "?";
}
/**
Create an integer value to represent the supplied comma-separated
string where each string in the TYPELIB denotes a bit position.
@param x string to decompose
@param lib TYPELIB (struct of pointer to values + count)
@param err index (not char position) of string element which was not
found or 0 if there was no error
@retval
a integer representation of the supplied string
*/
my_ulonglong find_typeset(char *x, TYPELIB *lib, int *err)
{
my_ulonglong result;
int find;
char *i;
DBUG_ENTER("find_set");
DBUG_PRINT("enter",("x: '%s' lib: %p", x, lib));
if (!lib->count)
{
DBUG_PRINT("exit",("no count"));
DBUG_RETURN(0);
}
result= 0;
*err= 0;
while (*x)
{
(*err)++;
i= x;
while (*x && *x != ',')
x++;
if (x[0] && x[1]) /* skip separator if found */
x++;
if ((find= find_type(i, lib, FIND_TYPE_COMMA_TERM) - 1) < 0)
DBUG_RETURN(0);
result|= (1ULL << find);
}
*err= 0;
DBUG_RETURN(result);
} /* find_set */
/**
Create a copy of a specified TYPELIB structure.
@param root pointer to a MEM_ROOT object for allocations
@param from pointer to a source TYPELIB structure
@retval
pointer to the new TYPELIB structure on successful copy
@retval
NULL otherwise
*/
TYPELIB *copy_typelib(MEM_ROOT *root, const TYPELIB *from)
{
TYPELIB *to;
uint i;
if (!from)
return NULL;
if (!(to= (TYPELIB*) alloc_root(root, sizeof(TYPELIB))))
return NULL;
if (!(to->type_names= (const char **)
alloc_root(root, (sizeof(char *) + sizeof(int)) * (from->count + 1))))
return NULL;
to->type_lengths= (unsigned int *)(to->type_names + from->count + 1);
to->count= from->count;
if (from->name)
{
if (!(to->name= strdup_root(root, from->name)))
return NULL;
}
else
to->name= NULL;
for (i= 0; i < from->count; i++)
{
if (!(to->type_names[i]= strmake_root(root, from->type_names[i],
from->type_lengths[i])))
return NULL;
to->type_lengths[i]= from->type_lengths[i];
}
to->type_names[to->count]= NULL;
to->type_lengths[to->count]= 0;
return to;
}
static const char *on_off_default_names[]= { "off","on","default", 0};
static TYPELIB on_off_default_typelib= {array_elements(on_off_default_names)-1,
"", on_off_default_names, 0};
/**
Parse a TYPELIB name from the buffer
@param lib Set of names to scan for.
@param strpos INOUT Start of the buffer (updated to point to the next
character after the name)
@param end End of the buffer
@note
The buffer is assumed to contain one of the names specified in the TYPELIB,
followed by comma, '=', or end of the buffer.
@retval
0 No matching name
@retval
>0 Offset+1 in typelib for matched name
*/
static uint parse_name(const TYPELIB *lib, const char **pos, const char *end)
{
uint find= find_type_eol(pos, lib,
FIND_TYPE_COMMA_TERM | FIND_TYPE_NO_PREFIX, end);
return find;
}
/**
Parse and apply a set of flag assingments
@param lib Flag names
@param default_name Number of "default" in the typelib
@param cur_set Current set of flags (start from this state)
@param default_set Default set of flags (use this for assign-default
keyword and flag=default assignments)
@param str String to be parsed
@param length Length of the string
@param err_pos OUT If error, set to point to start of wrong set string
NULL on success
@param err_len OUT If error, set to the length of wrong set string
@details
Parse a set of flag assignments, that is, parse a string in form:
param_name1=value1,param_name2=value2,...
where the names are specified in the TYPELIB, and each value can be
either 'on','off', or 'default'. Setting the same name twice is not
allowed.
Besides param=val assignments, we support the "default" keyword (keyword
#default_name in the typelib). It can be used one time, if specified it
causes us to build the new set over the default_set rather than cur_set
value.
@note
it's not charset aware
@retval
Parsed set value if (*errpos == NULL), otherwise undefined
*/
my_ulonglong find_set_from_flags(const TYPELIB *lib, uint default_name,
my_ulonglong cur_set, my_ulonglong default_set,
const char *str, uint length,
char **err_pos, uint *err_len)
{
const char *end= str + length;
my_ulonglong flags_to_set= 0, flags_to_clear= 0, res;
my_bool set_defaults= 0;
*err_pos= 0; /* No error yet */
if (str != end)
{
const char *start= str;
for (;;)
{
const char *pos= start;
uint flag_no, value;
if (!(flag_no= parse_name(lib, &pos, end)))
goto err;
if (flag_no == default_name)
{
/* Using 'default' twice isn't allowed. */
if (set_defaults)
goto err;
set_defaults= TRUE;
}
else
{
my_ulonglong bit= (1ULL << (flag_no - 1));
/* parse the '=on|off|default' */
if ((flags_to_clear | flags_to_set) & bit ||
pos >= end || *pos++ != '=' ||
!(value= parse_name(&on_off_default_typelib, &pos, end)))
goto err;
if (value == 1) /* this is '=off' */
flags_to_clear|= bit;
else if (value == 2) /* this is '=on' */
flags_to_set|= bit;
else /* this is '=default' */
{
if (default_set & bit)
flags_to_set|= bit;
else
flags_to_clear|= bit;
}
}
if (pos >= end)
break;
if (*pos++ != ',')
goto err;
start=pos;
continue;
err:
*err_pos= (char*)start;
*err_len= (uint)(end - start);
break;
}
}
res= set_defaults? default_set : cur_set;
res|= flags_to_set;
res&= ~flags_to_clear;
return res;
}
|