LXR qemu/qobject/qstring.c

   1/*
   2 * QString Module
   3 *
   4 * Copyright (C) 2009 Red Hat Inc.
   5 *
   6 * Authors:
   7 *  Luiz Capitulino <lcapitulino@redhat.com>
   8 *
   9 * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
  10 * See the COPYING.LIB file in the top-level directory.
  11 */
  12
  13#include "qemu/osdep.h"
  14#include "qapi/qmp/qstring.h"
  15#include "qobject-internal.h"
  16
  17/**
  18 * qstring_new(): Create a new empty QString
  19 *
  20 * Return strong reference.
  21 */
  22QString *qstring_new(void)
  23{
  24    return qstring_from_str("");
  25}
  26
  27/**
  28 * qstring_from_substr(): Create a new QString from a C string substring
  29 *
  30 * Return string reference
  31 */
  32QString *qstring_from_substr(const char *str, size_t start, size_t end)
  33{
  34    QString *qstring;
  35
  36    assert(start <= end);
  37    qstring = g_malloc(sizeof(*qstring));
  38    qobject_init(QOBJECT(qstring), QTYPE_QSTRING);
  39    qstring->string = g_strndup(str + start, end - start);
  40    return qstring;
  41}
  42
  43/**
  44 * qstring_from_str(): Create a new QString from a regular C string
  45 *
  46 * Return strong reference.
  47 */
  48QString *qstring_from_str(const char *str)
  49{
  50    return qstring_from_substr(str, 0, strlen(str));
  51}
  52
  53/**
  54 * qstring_from_gstring(): Convert a GString to a QString
  55 *
  56 * Return strong reference.
  57 */
  58
  59QString *qstring_from_gstring(GString *gstr)
  60{
  61    QString *qstring;
  62
  63    qstring = g_malloc(sizeof(*qstring));
  64    qobject_init(QOBJECT(qstring), QTYPE_QSTRING);
  65    qstring->string = g_string_free(gstr, false);
  66    return qstring;
  67}
  68
  69
  70/**
  71 * qstring_get_str(): Return a pointer to the stored string
  72 *
  73 * NOTE: Should be used with caution, if the object is deallocated
  74 * this pointer becomes invalid.
  75 */
  76const char *qstring_get_str(const QString *qstring)
  77{
  78    return qstring->string;
  79}
  80
  81/**
  82 * qstring_is_equal(): Test whether the two QStrings are equal
  83 */
  84bool qstring_is_equal(const QObject *x, const QObject *y)
  85{
  86    return !strcmp(qobject_to(QString, x)->string,
  87                   qobject_to(QString, y)->string);
  88}
  89
  90/**
  91 * qstring_destroy_obj(): Free all memory allocated by a QString
  92 * object
  93 */
  94void qstring_destroy_obj(QObject *obj)
  95{
  96    QString *qs;
  97
  98    assert(obj != NULL);
  99    qs = qobject_to(QString, obj);
 100    g_free((char *)qs->string);
 101    g_free(qs);
 102}
 103