Fixed several issues reported by PVS Studio static analyzer

CHANGELOG

@@ -3,6 +3,7 @@
 *******************************************************************************
 
 === 1.0.31 ===
+* Fixed several issues reported by PVS Studio static analyzer.
 * Added release_ptr() template method for releasing pointers that should be freed by finally statement.
 
 === 1.0.30 ===

README.md

@@ -9,8 +9,7 @@ It provides:
 * Macros for architecture-dependent assembly code and compilation.
 * Error codes and functions to work with them.
 
-Supported platforms
-======
+## Supported platforms
 
 The build and correct unit test execution has been confirmed for following platforms:
 * FreeBSD
@@ -19,16 +18,14 @@ The build and correct unit test execution has been confirmed for following platf
 * Windows 32-bit
 * Windows 64-bit
 
-Requirements
-======
+## Requirements
 
 The following packages need to be installed for building:
 
 * gcc >= 4.9
 * make >= 4.0
 
-Building
-======
+## Building
 
 To build the library, perform the following commands:
 
@@ -62,3 +59,7 @@ To clean the whole project tree including configuration files, run:
 ```bash
 make prune
 ```
+
+## SAST Tools
+
+* [PVS-Studio](https://pvs-studio.com/en/pvs-studio/?utm_source=website&utm_medium=github&utm_campaign=open_source) - static analyzer for C, C++, C#, and Java code.

src/main/debug.cpp

@@ -1,6 +1,6 @@
 /*
- * Copyright (C) 2020 Linux Studio Plugins Project <https://lsp-plug.in/>
- *           (C) 2020 Vladimir Sadovnikov <[email protected]>
+ * Copyright (C) 2023 Linux Studio Plugins Project <https://lsp-plug.in/>
+ *           (C) 2023 Vladimir Sadovnikov <[email protected]>
  *
  * This file is part of lsp-common-lib
  * Created on: 7 апр. 2020 г.
@@ -357,6 +357,9 @@ namespace lsp
 
         log_string & log_string::operator = (const log_string & src)
         {
+            if (this == &src)
+                return *this;
+
             if (text != NULL)
                 free(text);
             text        = (src.text != NULL) ? strdup(src.text) : NULL;
@@ -365,6 +368,9 @@ namespace lsp
 
         log_string & log_string::operator = (log_string && src)
         {
+            if (this == &src)
+                return *this;
+
             if (text != NULL)
                 free(text);
             text        = src.text;