qemu

FORK: QEMU emulator
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qstring.c (2252B)

      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  */
     22 QString *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  */
     32 QString *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  */
     48 QString *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 
     59 QString *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  */
     76 const 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  */
     84 bool 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  */
     94 void 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 
    104 void qstring_unref(QString *q)
    105 {
    106     qobject_unref(q);
    107 }