|
390.1.2
by Monty Taylor
Fixed copyright headers in drizzled/ |
1 |
/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
|
2 |
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
|
|
3 |
*
|
|
4 |
* Copyright (C) 2008 Sun Microsystems
|
|
5 |
*
|
|
6 |
* This program is free software; you can redistribute it and/or modify
|
|
7 |
* it under the terms of the GNU General Public License as published by
|
|
8 |
* the Free Software Foundation; version 2 of the License.
|
|
9 |
*
|
|
10 |
* This program is distributed in the hope that it will be useful,
|
|
11 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
12 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
13 |
* GNU General Public License for more details.
|
|
14 |
*
|
|
15 |
* You should have received a copy of the GNU General Public License
|
|
16 |
* along with this program; if not, write to the Free Software
|
|
17 |
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
18 |
*/
|
|
|
1
by brian
clean slate |
19 |
|
|
575.4.7
by Monty Taylor
More header cleanup. |
20 |
#ifndef DRIZZLED_SQL_ARRAY_H
|
21 |
#define DRIZZLED_SQL_ARRAY_H
|
|
22 |
||
|
212.5.13
by Monty Taylor
Moved my_sys/my_pthread/my_nosys and mysys_err to mysys. |
23 |
#include <mysys/my_sys.h> |
|
1
by brian
clean slate |
24 |
|
|
660.1.3
by Eric Herman
removed trailing whitespace with simple script: |
25 |
/*
|
|
1
by brian
clean slate |
26 |
Array of pointers to Elem that uses memory from MEM_ROOT
|
27 |
||
28 |
MEM_ROOT has no realloc() so this is supposed to be used for cases when
|
|
29 |
reallocations are rare.
|
|
30 |
*/
|
|
31 |
||
32 |
template <class Elem> class Array |
|
33 |
{
|
|
34 |
enum {alloc_increment = 16}; |
|
35 |
Elem **buffer; |
|
|
482
by Brian Aker
Remove uint. |
36 |
uint32_t n_elements, max_element; |
|
1
by brian
clean slate |
37 |
public: |
|
482
by Brian Aker
Remove uint. |
38 |
Array(MEM_ROOT *mem_root, uint32_t prealloc=16) |
|
1
by brian
clean slate |
39 |
{
|
40 |
buffer= (Elem**)alloc_root(mem_root, prealloc * sizeof(Elem**)); |
|
41 |
max_element = buffer? prealloc : 0; |
|
42 |
n_elements= 0; |
|
43 |
}
|
|
44 |
||
45 |
Elem& at(int idx) |
|
46 |
{
|
|
47 |
return *(((Elem*)buffer) + idx); |
|
48 |
}
|
|
49 |
||
50 |
Elem **front() |
|
51 |
{
|
|
52 |
return buffer; |
|
53 |
}
|
|
54 |
||
55 |
Elem **back() |
|
56 |
{
|
|
57 |
return buffer + n_elements; |
|
58 |
}
|
|
59 |
||
60 |
bool append(MEM_ROOT *mem_root, Elem *el) |
|
61 |
{
|
|
62 |
if (n_elements == max_element) |
|
63 |
{
|
|
64 |
Elem **newbuf; |
|
65 |
if (!(newbuf= (Elem**)alloc_root(mem_root, (n_elements + alloc_increment)* |
|
66 |
sizeof(Elem**)))) |
|
67 |
{
|
|
|
51.1.48
by Jay Pipes
Removed/replaced DBUG symbols and standardized TRUE/FALSE |
68 |
return false; |
|
1
by brian
clean slate |
69 |
}
|
70 |
memcpy(newbuf, buffer, n_elements*sizeof(Elem*)); |
|
71 |
buffer= newbuf; |
|
72 |
}
|
|
73 |
buffer[n_elements++]= el; |
|
|
51.1.48
by Jay Pipes
Removed/replaced DBUG symbols and standardized TRUE/FALSE |
74 |
return false; |
|
1
by brian
clean slate |
75 |
}
|
76 |
||
77 |
int elements() |
|
78 |
{
|
|
79 |
return n_elements; |
|
80 |
}
|
|
81 |
||
82 |
void clear() |
|
83 |
{
|
|
84 |
n_elements= 0; |
|
85 |
}
|
|
86 |
||
87 |
typedef int (*CMP_FUNC)(Elem * const *el1, Elem *const *el2); |
|
88 |
||
89 |
void sort(CMP_FUNC cmp_func) |
|
90 |
{
|
|
91 |
my_qsort(buffer, n_elements, sizeof(Elem*), (qsort_cmp)cmp_func); |
|
92 |
}
|
|
93 |
};
|
|
94 |
||
|
575.4.7
by Monty Taylor
More header cleanup. |
95 |
#endif /* DRIZZLED_SQL_ARRAY_H */ |