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
|
/* Copyright (C) 2000 MySQL 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; either version 2 of the License, or
(at your option) any later version.
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
/* This file is originally from the mysql distribution. Coded by monty */
#ifdef __GNUC__
#pragma interface /* gcc class implementation */
#endif
#ifndef NOT_FIXED_DEC
#define NOT_FIXED_DEC 31
#endif
class String;
int sortcmp(const String *a,const String *b);
int stringcmp(const String *a,const String *b);
String *copy_if_not_alloced(String *a,String *b,uint32 arg_length);
class String
{
char *Ptr;
uint32 str_length,Alloced_length;
bool alloced;
CHARSET_INFO *str_charset;
public:
String()
{
Ptr=0; str_length=Alloced_length=0; alloced=0;
str_charset= &my_charset_latin1;
}
String(uint32 length_arg)
{
alloced=0; Alloced_length=0; (void) real_alloc(length_arg);
str_charset= &my_charset_latin1;
}
String(const char *str, CHARSET_INFO *cs)
{
Ptr=(char*) str; str_length=(uint) strlen(str); Alloced_length=0; alloced=0;
str_charset=cs;
}
String(const char *str,uint32 len, CHARSET_INFO *cs)
{
Ptr=(char*) str; str_length=len; Alloced_length=0; alloced=0;
str_charset=cs;
}
String(char *str,uint32 len, CHARSET_INFO *cs)
{
Ptr=(char*) str; Alloced_length=str_length=len; alloced=0;
str_charset=cs;
}
String(const String &str)
{
Ptr=str.Ptr ; str_length=str.str_length ;
Alloced_length=str.Alloced_length; alloced=0;
str_charset=str.str_charset;
}
static void *operator new(size_t size) { return (void*) sql_alloc((uint) size); }
static void operator delete(void *ptr_arg,size_t size) /*lint -e715 */
{ sql_element_free(ptr_arg); }
~String() { free(); }
inline void set_charset(CHARSET_INFO *charset) { str_charset=charset; }
inline CHARSET_INFO *charset() const { return str_charset; }
inline uint32 length() const { return str_length;}
inline uint32 alloced_length() const { return Alloced_length;}
inline char& operator [] (uint32 i) const { return Ptr[i]; }
inline void length(uint32 len) { str_length=len ; }
inline bool is_empty() { return (str_length == 0); }
inline const char *ptr() const { return Ptr; }
inline char *c_ptr()
{
if (!Ptr || Ptr[str_length]) /* Should be safe */
(void) realloc(str_length);
return Ptr;
}
inline char *c_ptr_quick()
{
if (Ptr && str_length < Alloced_length)
Ptr[str_length]=0;
return Ptr;
}
void set(String &str,uint32 offset,uint32 arg_length)
{
free();
Ptr=(char*) str.ptr()+offset; str_length=arg_length; alloced=0;
if (str.Alloced_length)
Alloced_length=str.Alloced_length-offset;
else
Alloced_length=0;
str_charset=str.str_charset;
}
inline void set(char *str,uint32 arg_length, CHARSET_INFO *cs)
{
free();
Ptr=(char*) str; str_length=Alloced_length=arg_length ; alloced=0;
str_charset=cs;
}
inline void set(const char *str,uint32 arg_length, CHARSET_INFO *cs)
{
free();
Ptr=(char*) str; str_length=arg_length; Alloced_length=0 ; alloced=0;
str_charset=cs;
}
inline void set_quick(char *str,uint32 arg_length, CHARSET_INFO *cs)
{
if (!alloced)
{
Ptr=(char*) str; str_length=Alloced_length=arg_length;
}
str_charset=cs;
}
bool set(longlong num, CHARSET_INFO *cs);
bool set(ulonglong num, CHARSET_INFO *cs);
bool set(double num,uint decimals, CHARSET_INFO *cs);
inline void free()
{
if (alloced)
{
alloced=0;
Alloced_length=0;
my_free(Ptr,MYF(0));
Ptr=0;
str_length=0; /* Safety */
}
}
inline bool alloc(uint32 arg_length)
{
if (arg_length < Alloced_length)
return 0;
return real_alloc(arg_length);
}
bool real_alloc(uint32 arg_length); // Empties old string
bool realloc(uint32 arg_length);
inline void shrink(uint32 arg_length) // Shrink buffer
{
if (arg_length < Alloced_length)
{
char *new_ptr;
if (!(new_ptr=(char*) my_realloc(Ptr,arg_length,MYF(0))))
{
Alloced_length = 0;
real_alloc(arg_length);
}
else
{
Ptr=new_ptr;
Alloced_length=arg_length;
}
}
}
bool is_alloced() { return alloced; }
inline String& operator = (const String &s)
{
if (&s != this)
{
free();
Ptr=s.Ptr ; str_length=s.str_length ; Alloced_length=s.Alloced_length;
alloced=0;
}
return *this;
}
bool copy(); // Alloc string if not alloced
bool copy(const String &s); // Allocate new string
bool copy(const char *s,uint32 arg_length, CHARSET_INFO *cs); // Allocate new string
bool copy(const char*s,uint32 arg_length, CHARSET_INFO *csfrom, CHARSET_INFO *csto);
bool append(const String &s);
bool append(const char *s,uint32 arg_length=0);
bool append(IO_CACHE* file, uint32 arg_length);
int strstr(const String &search,uint32 offset=0); // Returns offset to substring or -1
int strstr_case(const String &s,uint32 offset=0);
int strrstr(const String &search,uint32 offset=0); // Returns offset to substring or -1
bool replace(uint32 offset,uint32 arg_length,const String &to);
inline bool append(char chr)
{
if (str_length < Alloced_length)
{
Ptr[str_length++]=chr;
}
else
{
if (realloc(str_length+1))
return 1;
Ptr[str_length++]=chr;
}
return 0;
}
bool fill(uint32 max_length,char fill);
void strip_sp();
inline void caseup() { my_caseup(str_charset,Ptr,str_length); }
inline void casedn() { my_casedn(str_charset,Ptr,str_length); }
friend int sortcmp(const String *a,const String *b);
friend int stringcmp(const String *a,const String *b);
friend String *copy_if_not_alloced(String *a,String *b,uint32 arg_length);
uint32 numchars();
int charpos(int i,uint32 offset=0);
int reserve(uint32 space_needed)
{
return realloc(str_length + space_needed);
}
int reserve(uint32 space_needed, uint32 grow_by);
/*
The following append operations do NOT check alloced memory
q_*** methods writes values of parameters itself
qs_*** methods writes string representation of value
*/
void q_append(const char &c)
{
Ptr[str_length++] = c;
}
void q_append(const uint32 &n)
{
int4store(Ptr + str_length, n);
str_length += 4;
}
void q_append(double d)
{
float8store(Ptr + str_length, d);
str_length += 8;
}
void q_append(double *d)
{
float8store(Ptr + str_length, *d);
str_length += 8;
}
void q_append(const char *data, uint32 data_len)
{
memcpy(Ptr + str_length, data, data_len);
str_length += data_len;
}
void WriteAtPosition(int position, uint32 value)
{
int4store(Ptr + position,value);
}
void qs_append(const char *str);
void qs_append(double d);
void qs_append(double *d);
void qs_append(const char &c);
};
|
