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
|
/*!
\file db/dbmi_base/string.c
\brief DBMI Library (base) - string management
(C) 1999-2009 by the GRASS Development Team
This program is free software under the GNU General Public License
(>=v2). Read the file COPYING that comes with GRASS for details.
\author Joel Jones (CERL/UIUC)
\author Upgraded to GRASS 5.7 by Radim Blazek
*/
#include <string.h>
#include <stdlib.h>
#include <grass/gis.h>
#include <grass/dbmi.h>
/*!
\brief Initialize dbString
\param[out] x pointer to dbString
*/
void db_init_string(dbString *x)
{
G_zero(x, sizeof(dbString));
}
static int set_string(dbString *x, char *s, int copy);
/*!
\brief Inserts string to dbString (enlarge string)
\param[in,out] x pointer to dbString
\param s string to be inserted
\return DB_OK on success
\return DB_MEMORY_ERR on error
*/
int db_set_string(dbString *x, const char *s)
{
return set_string(x, (char *)s, 1);
}
/*!
\brief Inserts string to dbString (overwrite current value)
\param[in,out] x pointer to dbString
\param s string to be inserted
\return DB_OK on success
\return DB_MEMORY_ERR on error
*/
int db_set_string_no_copy(dbString *x, char *s)
{
return set_string(x, s, 0);
}
/*!
\brief Get string size
\param x pointer to dbString
\return string size
*/
unsigned int db_sizeof_string(const dbString *x)
{
if (x->nalloc < 0)
return 0;
return (unsigned int)x->nalloc;
}
/*!
\brief Zero string
\param x pointer to dbString
*/
void db_zero_string(dbString *x)
{
if (db_get_string(x) && x->nalloc > 0)
db_zero((void *)db_get_string(x), x->nalloc);
}
static int set_string(dbString *x, char *s, int copy)
{
int len;
int stat;
if (s == NULL) {
s = "";
copy = 1;
}
len = strlen(s) + 1;
if (copy) {
stat = db_enlarge_string(x, len);
if (stat != DB_OK)
return stat;
strcpy(x->string, s);
}
else {
db_free_string(x);
x->string = s;
x->nalloc = -1;
}
return DB_OK;
}
/*!
\brief Enlarge dbString
\param x pointer to dbString
\param len requested string size
\return DB_OK on success
\return DB_MEMORY_ERR on error
*/
int db_enlarge_string(dbString *x, int len)
{
if (x->nalloc < len) {
if (x->nalloc < 0)
x->string = NULL;
x->string = db_realloc((void *)x->string, len);
if (x->string == NULL)
return DB_MEMORY_ERR;
x->nalloc = len;
}
return DB_OK;
}
/*!
\brief Get string
\param x pointer to dbString
\return pointer to buffer containing string
*/
char *db_get_string(const dbString *x)
{
return x->string;
}
/*!
\brief Free allocated space for dbString
\param x pointer to dbString
*/
void db_free_string(dbString *x)
{
if (x->nalloc > 0)
db_free(x->string);
db_init_string(x);
}
/*!
\brief Free allocated dbString array
\param a pointer to 1st dbString in the array
\param n number of items in array
*/
void db_free_string_array(dbString *a, int n)
{
int i;
if (a) {
for (i = 0; i < n; i++)
db_free_string(&a[i]);
db_free(a);
}
}
/*!
\brief Allocate dbString array
\param count number of items to be allocated
\return pointer to 1st dbString in the array
*/
dbString *db_alloc_string_array(int count)
{
int i;
dbString *a;
if (count < 0)
count = 0;
a = (dbString *)db_calloc(count, sizeof(dbString));
if (a) {
for (i = 0; i < count; i++)
db_init_string(&a[i]);
}
return a;
}
/*!
\brief Append string to dbString
\param x pointer to dbString
\param s string to be appended
\return DB_OK on success
\return otherwise error code is returned
*/
int db_append_string(dbString *x, const char *s)
{
int len;
int stat;
if (!db_get_string(x))
return db_set_string(x, s);
len = strlen(db_get_string(x)) + strlen(s) + 1;
stat = db_enlarge_string(x, len);
if (stat != DB_OK)
return stat;
strcat(db_get_string(x), s);
return DB_OK;
}
/*!
\brief Copy dbString
\param dst destination dbString
\param src source dbString
\return DB_OK on success
\return DB_ERR code on error
*/
int db_copy_string(dbString *dst, const dbString *src)
{
return db_set_string(dst, db_get_string(src));
}
/*!
\brief Replace each ' is replaced by ''
\param src pointer to dbString
*/
void db_double_quote_string(dbString *src)
{
char *ptra, *ptrb, buf[2];
dbString tmp;
db_init_string(&tmp);
buf[1] = 0;
ptrb = db_get_string(src);
while ((ptra = strchr(ptrb, '\'')) != NULL) {
for (; ptrb <= ptra; ptrb++) {
buf[0] = ptrb[0];
db_append_string(&tmp, buf);
}
db_append_string(&tmp, "'");
}
db_append_string(&tmp, ptrb);
db_set_string(src, db_get_string(&tmp));
db_free_string(&tmp);
}
|
