From 66f7048712693a6ff877209c1ff36aa8eadf2eb5 Mon Sep 17 00:00:00 2001 From: Luiz Capitulino Date: Fri, 28 Aug 2009 15:27:06 -0300 Subject: Introduce QString QString is a high-level data type that can be used to represent C strings. The following functions are available: - qstring_from_str() Create a new QString - qstring_get_str() Get a pointer to the stored string Note that qstring_get_str() is too low-level for a data type like this, but it's interesting for quick read-only accesses. Signed-off-by: Luiz Capitulino Signed-off-by: Anthony Liguori --- qstring.c | 73 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 73 insertions(+) create mode 100644 qstring.c (limited to 'qstring.c') diff --git a/qstring.c b/qstring.c new file mode 100644 index 0000000000..9fa2e3024e --- /dev/null +++ b/qstring.c @@ -0,0 +1,73 @@ +/* + * QString data type. + * + * Copyright (C) 2009 Red Hat Inc. + * + * Authors: + * Luiz Capitulino + * + * This work is licensed under the terms of the GNU GPL, version 2. See + * the COPYING file in the top-level directory. + */ +#include "qobject.h" +#include "qstring.h" +#include "qemu-common.h" + +static const QType qstring_type; + +/** + * qstring_from_str(): Create a new QString from a regular C string + * + * Return strong reference. + */ +QString *qstring_from_str(const char *str) +{ + QString *qstring; + + qstring = qemu_malloc(sizeof(*qstring)); + qstring->string = qemu_strdup(str); + QOBJECT_INIT(qstring, &qstring_type); + + return qstring; +} + +/** + * qobject_to_qstring(): Convert a QObject to a QString + */ +QString *qobject_to_qstring(const QObject *obj) +{ + if (qobject_type(obj) != QTYPE_QSTRING) + return NULL; + + return container_of(obj, QString, base); +} + +/** + * 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_destroy_obj(): Free all memory allocated by a QString + * object + */ +static void qstring_destroy_obj(QObject *obj) +{ + QString *qs; + + assert(obj != NULL); + qs = qobject_to_qstring(obj); + qemu_free(qs->string); + qemu_free(qs); +} + +static const QType qstring_type = { + .code = QTYPE_QSTRING, + .destroy = qstring_destroy_obj, +}; -- cgit v1.2.3