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authorAnthony Liguori <aliguori@us.ibm.com>2009-11-11 10:49:51 -0600
committerAnthony Liguori <aliguori@us.ibm.com>2009-11-17 08:49:38 -0600
commitd30ec846ed89672426b19d50a899ae849ec27edf (patch)
tree9d3bfe599a90ebd88670bec9b5ad6411baf978e4 /qstring.c
parentAdd operations to qlist to allow it to be used as a stack (diff)
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Allow strings to grow in size
This lets us use QString for building larger strings Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Diffstat (limited to 'qstring.c')
-rw-r--r--qstring.c37
1 files changed, 36 insertions, 1 deletions
diff --git a/qstring.c b/qstring.c
index 6d411da7b..441a9e6ef 100644
--- a/qstring.c
+++ b/qstring.c
@@ -21,6 +21,16 @@ static const QType qstring_type = {
};
/**
+ * qstring_new(): Create a new empty QString
+ *
+ * Return strong reference.
+ */
+QString *qstring_new(void)
+{
+ return qstring_from_str("");
+}
+
+/**
* qstring_from_str(): Create a new QString from a regular C string
*
* Return strong reference.
@@ -30,12 +40,37 @@ QString *qstring_from_str(const char *str)
QString *qstring;
qstring = qemu_malloc(sizeof(*qstring));
- qstring->string = qemu_strdup(str);
+
+ qstring->length = strlen(str);
+ qstring->capacity = qstring->length;
+
+ qstring->string = qemu_malloc(qstring->capacity + 1);
+ memcpy(qstring->string, str, qstring->length);
+ qstring->string[qstring->length] = 0;
+
QOBJECT_INIT(qstring, &qstring_type);
return qstring;
}
+/* qstring_append(): Append a C string to a QString
+ */
+void qstring_append(QString *qstring, const char *str)
+{
+ size_t len = strlen(str);
+
+ if (qstring->capacity < (qstring->length + len)) {
+ qstring->capacity += len;
+ qstring->capacity *= 2; /* use exponential growth */
+
+ qstring->string = qemu_realloc(qstring->string, qstring->capacity + 1);
+ }
+
+ memcpy(qstring->string + qstring->length, str, len);
+ qstring->length += len;
+ qstring->string[qstring->length] = 0;
+}
+
/**
* qobject_to_qstring(): Convert a QObject to a QString
*/