Fix chrdev return value conversion

[qemu.git] / qstring.c

diff --git a/qstring.c b/qstring.c
index 441a9e6ef0f97b061cb84ad669887564353ceeb1..4e2ba083b71269e53c9e805718817a57031b2598 100644 (file)
--- a/qstring.c
+++ b/qstring.c
@@ -1,14 +1,15 @@
 /*
- * QString data type.
+ * QString Module
  *
  * Copyright (C) 2009 Red Hat Inc.
  *
  * Authors:
  *  Luiz Capitulino <lcapitulino@redhat.com>
  *
- * This work is licensed under the terms of the GNU GPL, version 2.  See
- * the COPYING file in the top-level directory.
+ * 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 "qobject.h"
 #include "qstring.h"
 #include "qemu-common.h"
@@ -31,21 +32,21 @@ QString *qstring_new(void)
 }
 
 /**
- * qstring_from_str(): Create a new QString from a regular C string
+ * qstring_from_substr(): Create a new QString from a C string substring
  *
- * Return strong reference.
+ * Return string reference
  */
-QString *qstring_from_str(const char *str)
+QString *qstring_from_substr(const char *str, int start, int end)
 {
     QString *qstring;
 
     qstring = qemu_malloc(sizeof(*qstring));
 
-    qstring->length = strlen(str);
+    qstring->length = end - start + 1;
     qstring->capacity = qstring->length;
 
     qstring->string = qemu_malloc(qstring->capacity + 1);
-    memcpy(qstring->string, str, qstring->length);
+    memcpy(qstring->string, str + start, qstring->length);
     qstring->string[qstring->length] = 0;
 
     QOBJECT_INIT(qstring, &qstring_type);
@@ -53,24 +54,56 @@ QString *qstring_from_str(const char *str)
     return qstring;
 }
 
-/* qstring_append(): Append a C string to a QString
+/**
+ * qstring_from_str(): Create a new QString from a regular C string
+ *
+ * Return strong reference.
  */
-void qstring_append(QString *qstring, const char *str)
+QString *qstring_from_str(const char *str)
 {
-    size_t len = strlen(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 = qemu_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;
+}
+
 /**
  * qobject_to_qstring(): Convert a QObject to a QString
  */