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
|
/* 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; 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
/*
Code for handling strings with can grow dynamicly.
Copyright Monty Program KB.
By monty.
*/
#include "mysys_priv.h"
#include <mystrings/m_string.h>
bool init_dynamic_string(DYNAMIC_STRING *str, const char *init_str,
size_t init_alloc, size_t alloc_increment)
{
uint length;
if (!alloc_increment)
alloc_increment=128;
length=1;
if (init_str && (length= strlen(init_str)+1) < init_alloc)
init_alloc=((length+alloc_increment-1)/alloc_increment)*alloc_increment;
if (!init_alloc)
init_alloc=alloc_increment;
if (!(str->str=(char*) my_malloc(init_alloc,MYF(MY_WME))))
return(true);
str->length=length-1;
if (init_str)
memcpy(str->str,init_str,length);
str->max_length=init_alloc;
str->alloc_increment=alloc_increment;
return(false);
}
bool dynstr_set(DYNAMIC_STRING *str, const char *init_str)
{
uint length=0;
if (init_str && (length= (uint) strlen(init_str)+1) > str->max_length)
{
str->max_length=((length+str->alloc_increment-1)/str->alloc_increment)*
str->alloc_increment;
if (!str->max_length)
str->max_length=str->alloc_increment;
if (!(str->str=(char*) my_realloc(str->str,str->max_length,MYF(MY_WME))))
return(true);
}
if (init_str)
{
str->length=length-1;
memcpy(str->str,init_str,length);
}
else
str->length=0;
return(false);
}
bool dynstr_realloc(DYNAMIC_STRING *str, size_t additional_size)
{
if (!additional_size) return(false);
if (str->length + additional_size > str->max_length)
{
str->max_length=((str->length + additional_size+str->alloc_increment-1)/
str->alloc_increment)*str->alloc_increment;
if (!(str->str=(char*) my_realloc(str->str,str->max_length,MYF(MY_WME))))
return(true);
}
return(false);
}
bool dynstr_append(DYNAMIC_STRING *str, const char *append)
{
return dynstr_append_mem(str,append,(uint) strlen(append));
}
bool dynstr_append_mem(DYNAMIC_STRING *str, const char *append,
size_t length)
{
char *new_ptr;
if (str->length+length >= str->max_length)
{
uint new_length=(str->length+length+str->alloc_increment)/
str->alloc_increment;
new_length*=str->alloc_increment;
if (!(new_ptr=(char*) my_realloc(str->str,new_length,MYF(MY_WME))))
return true;
str->str=new_ptr;
str->max_length=new_length;
}
memcpy(str->str + str->length,append,length);
str->length+=length;
str->str[str->length]=0; /* Safety for C programs */
return false;
}
bool dynstr_trunc(DYNAMIC_STRING *str, size_t n)
{
str->length-=n;
str->str[str->length]= '\0';
return false;
}
/*
Concatenates any number of strings, escapes any OS quote in the result then
surround the whole affair in another set of quotes which is finally appended
to specified DYNAMIC_STRING. This function is especially useful when
building strings to be executed with the system() function.
@param str Dynamic String which will have addtional strings appended.
@param append String to be appended.
@param ... Optional. Additional string(s) to be appended.
@note The final argument in the list must be NullS even if no additional
options are passed.
@return True = Success.
*/
bool dynstr_append_os_quoted(DYNAMIC_STRING *str, const char *append, ...)
{
const char *quote_str= "\'";
const uint quote_len= 1;
bool ret= true;
va_list dirty_text;
ret&= dynstr_append_mem(str, quote_str, quote_len); /* Leading quote */
va_start(dirty_text, append);
while (append != NullS)
{
const char *cur_pos= append;
const char *next_pos= cur_pos;
/* Search for quote in each string and replace with escaped quote */
while(*(next_pos= strcend(cur_pos, quote_str[0])) != '\0')
{
ret&= dynstr_append_mem(str, cur_pos, next_pos - cur_pos);
ret&= dynstr_append_mem(str ,"\\", 1);
ret&= dynstr_append_mem(str, quote_str, quote_len);
cur_pos= next_pos + 1;
}
ret&= dynstr_append_mem(str, cur_pos, next_pos - cur_pos);
append= va_arg(dirty_text, char *);
}
va_end(dirty_text);
ret&= dynstr_append_mem(str, quote_str, quote_len); /* Trailing quote */
return ret;
}
void dynstr_free(DYNAMIC_STRING *str)
{
if (str->str)
{
my_free(str->str,MYF(MY_WME));
str->str=0;
}
}
|