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
|
/*
* QString Module
*
* Copyright (C) 2009 Red Hat Inc.
*
* Authors:
* Luiz Capitulino <lcapitulino@redhat.com>
*
* This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
* See the COPYING.LIB file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "qapi/qmp/qstring.h"
#include "qemu-common.h"
/**
* qstring_new(): Create a new empty QString
*
* Return strong reference.
*/
QString *qstring_new(void)
{
return qstring_from_str("");
}
/**
* qstring_get_length(): Get the length of a QString
*/
size_t qstring_get_length(const QString *qstring)
{
return qstring->length;
}
/**
* qstring_from_substr(): Create a new QString from a C string substring
*
* Return string reference
*/
QString *qstring_from_substr(const char *str, int start, int end)
{
QString *qstring;
qstring = g_malloc(sizeof(*qstring));
qobject_init(QOBJECT(qstring), QTYPE_QSTRING);
qstring->length = end - start + 1;
qstring->capacity = qstring->length;
qstring->string = g_malloc(qstring->capacity + 1);
memcpy(qstring->string, str + start, qstring->length);
qstring->string[qstring->length] = 0;
return qstring;
}
/**
* qstring_from_str(): Create a new QString from a regular C string
*
* Return strong reference.
*/
QString *qstring_from_str(const char *str)
{
return qstring_from_substr(str, 0, strlen(str) - 1);
}
static void capacity_increase(QString *qstring, size_t len)
{
if (qstring->capacity < (qstring->length + len)) {
qstring->capacity += len;
qstring->capacity *= 2; /* use exponential growth */
qstring->string = g_realloc(qstring->string, qstring->capacity + 1);
}
}
/* qstring_append(): Append a C string to a QString
*/
void qstring_append(QString *qstring, const char *str)
{
size_t len = strlen(str);
capacity_increase(qstring, len);
memcpy(qstring->string + qstring->length, str, len);
qstring->length += len;
qstring->string[qstring->length] = 0;
}
void qstring_append_int(QString *qstring, int64_t value)
{
char num[32];
snprintf(num, sizeof(num), "%" PRId64, value);
qstring_append(qstring, num);
}
/**
* qstring_append_chr(): Append a C char to a QString
*/
void qstring_append_chr(QString *qstring, int c)
{
capacity_increase(qstring, 1);
qstring->string[qstring->length++] = c;
qstring->string[qstring->length] = 0;
}
/**
* qstring_get_str(): Return a pointer to the stored string
*
* NOTE: Should be used with caution, if the object is deallocated
* this pointer becomes invalid.
*/
const char *qstring_get_str(const QString *qstring)
{
return qstring->string;
}
/**
* qstring_is_equal(): Test whether the two QStrings are equal
*/
bool qstring_is_equal(const QObject *x, const QObject *y)
{
return !strcmp(qobject_to(QString, x)->string,
qobject_to(QString, y)->string);
}
/**
* qstring_destroy_obj(): Free all memory allocated by a QString
* object
*/
void qstring_destroy_obj(QObject *obj)
{
QString *qs;
assert(obj != NULL);
qs = qobject_to(QString, obj);
g_free(qs->string);
g_free(qs);
}
|
