Minor fixes for clangd warnings

.clang-tidy

@@ -1,16 +1,18 @@
 ---
 Checks: >
-  modernize-*,
-  performance-*,
-  readability-*,
-  bugprone-*,
+  *,
+  -altera-*,
   -bugprone-easily-swappable-parameters,
+  -cppcoreguidelines-avoid-magic-numbers,
+  -cppcoreguidelines-avoid-non-const-global-variables,
+  -google-readability-braces-around-statements,
+  -hicpp-braces-around-statements,
+  -hicpp-signed-bitwise,
+  -llvmlibc-restrict-system-libc-headers,
   -readability-braces-around-statements,
   -readability-magic-numbers,
   -readability-function-cognitive-complexity,
-  -readability-identifier-length
+  -readability-identifier-length,
 ...
-
 WarningsAsErrors: '*'
-HeaderFilterRegex: ''
 FormatStyle: none

CMakeLists.txt

@@ -4,7 +4,7 @@ project(nanomodbus C)
 set(CMAKE_C_STANDARD 99)
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra -pedantic -Wswitch-enum -Wcast-qual -Woverflow")
 set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -O0 -g")
-set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} -O3")
+set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} -O3 -g0")
 
 include_directories(tests examples/linux .)
 

nanomodbus.c

@@ -3,7 +3,7 @@
 
     MIT License
 
-    Copyright (c) 2022 Valerio De Benedetto (@debevv)
+    Copyright (c) 2024 Valerio De Benedetto (@debevv)
 
     Permission is hereby granted, free of charge, to any person obtaining a copy
     of this software and associated documentation files (the "Software"), to deal
@@ -27,6 +27,7 @@
 #include "nanomodbus.h"
 
 #include <stdbool.h>
+#include <stdint.h>
 #include <string.h>
 
 #ifdef NMBS_DEBUG
@@ -423,7 +424,7 @@ static nmbs_error recv_res_header(nmbs_t* nmbs) {
     uint8_t req_unit_id = nmbs->msg.unit_id;
     uint8_t req_fc = nmbs->msg.fc;
 
-    bool first_byte_received;
+    bool first_byte_received = false;
     nmbs_error err = recv_msg_header(nmbs, &first_byte_received);
     if (err != NMBS_ERROR_NONE)
         return err;
@@ -1710,7 +1711,7 @@ static nmbs_error handle_read_device_identification(nmbs_t* nmbs) {
 
                 int16_t str_len = (int16_t) strlen(str);
 
-                res_size_left = res_size_left - 2 - str_len;
+                res_size_left = (int16_t) (res_size_left - 2 - str_len);
                 if (res_size_left < 0) {
                     res_more_follows = 0xFF;
                     res_next_object_id = id;
@@ -1747,7 +1748,7 @@ static nmbs_error handle_read_device_identification(nmbs_t* nmbs) {
 static nmbs_error handle_req_fc(nmbs_t* nmbs) {
     NMBS_DEBUG_PRINT("fc %d\t", nmbs->msg.fc);
 
-    nmbs_error err;
+    nmbs_error err = NMBS_ERROR_NONE;
     switch (nmbs->msg.fc) {
 #ifndef NMBS_SERVER_WRITE_MULTIPLE_COILS_DISABLED
         case 1:

nanomodbus.h

@@ -3,7 +3,7 @@
 
     MIT License
 
-    Copyright (c) 2022 Valerio De Benedetto (@debevv)
+    Copyright (c) 2024 Valerio De Benedetto (@debevv)
 
     Permission is hereby granted, free of charge, to any person obtaining a copy
     of this software and associated documentation files (the "Software"), to deal
@@ -42,7 +42,6 @@
 
 #include <stdbool.h>
 #include <stdint.h>
-#include <string.h>
 
 #ifdef __cplusplus
 extern "C" {
@@ -440,25 +439,25 @@ nmbs_error nmbs_read_write_registers(nmbs_t* nmbs, uint16_t read_address, uint16
  * @param vendor_name char array where the read VendorName value will be stored
  * @param product_code char array where the read ProductCode value will be stored
  * @param major_minor_revision char array where the read MajorMinorRevision value will be stored
- * @param buffer_length length of every char array
+ * @param buffers_length length of every char array
  *
  * @return NMBS_ERROR_NONE if successful, other errors otherwise.
  */
 nmbs_error nmbs_read_device_identification_basic(nmbs_t* nmbs, char* vendor_name, char* product_code,
-                                                 char* major_minor_revision, uint8_t buffer_length);
+                                                 char* major_minor_revision, uint8_t buffers_length);
 
 /** Send a FC 43 / 14 (0x2B / 0x0E) Read Device Identification to read all Regular Object Id values (Read Device ID code 2)
  * @param nmbs pointer to the nmbs_t instance
  * @param vendor_url char array where the read VendorUrl value will be stored
  * @param product_name char array where the read ProductName value will be stored
  * @param model_name char array where the read ModelName value will be stored
  * @param user_application_name char array where the read UserApplicationName value will be stored
- * @param buffer_length length of every char array
+ * @param buffers_length length of every char array
  *
  * @return NMBS_ERROR_NONE if successful, other errors otherwise.
  */
 nmbs_error nmbs_read_device_identification_regular(nmbs_t* nmbs, char* vendor_url, char* product_name, char* model_name,
-                                                   char* user_application_name, uint8_t buffer_length);
+                                                   char* user_application_name, uint8_t buffers_length);
 
 /** Send a FC 43 / 14 (0x2B / 0x0E) Read Device Identification to read all Extended Object Id values (Read Device ID code 3)
  * @param nmbs pointer to the nmbs_t instance

tests/nanomodbus_tests.h

@@ -2,6 +2,7 @@
 #undef NDEBUG
 #include <assert.h>
 #include <pthread.h>
+#include <stddef.h>
 #include <stdio.h>
 #include <string.h>
 #include <sys/select.h>
@@ -40,14 +41,14 @@ nmbs_t CLIENT, SERVER;
     printf("Should %s\n", (s))
 
 
-uint64_t now_ms() {
+uint64_t now_ms(void) {
     struct timespec ts = {0, 0};
     clock_gettime(CLOCK_MONOTONIC_RAW, &ts);
     return (uint64_t) (ts.tv_sec) * 1000 + (uint64_t) (ts.tv_nsec) / 1000000;
 }
 
 
-void reset_sockets() {
+void reset_sockets(void) {
     if (sockets[0] != -1)
         close(sockets[0]);
 
@@ -70,20 +71,20 @@ int32_t read_fd(int fd, uint8_t* buf, uint16_t count, int32_t timeout_ms) {
         if (timeout_ms >= 0) {
             tv_p = &tv;
             tv.tv_sec = timeout_ms / 1000;
-            tv.tv_usec = (timeout_ms % 1000) * 1000;
+            tv.tv_usec = ((__suseconds_t) timeout_ms % 1000) * 1000;
         }
 
         int ret = select(fd + 1, &rfds, NULL, NULL, tv_p);
         if (ret == 0) {
             return total;
         }
-        else if (ret == 1) {
+
+        if (ret == 1) {
             ssize_t r = read(fd, buf + total, 1);
             if (r <= 0)
                 return -1;
-            else {
-                total += r;
-            }
+
+            total += r;
         }
         else
             return -1;
@@ -105,20 +106,20 @@ int32_t write_fd(int fd, const uint8_t* buf, uint16_t count, int32_t timeout_ms)
         if (timeout_ms >= 0) {
             tv_p = &tv;
             tv.tv_sec = timeout_ms / 1000;
-            tv.tv_usec = (timeout_ms % 1000) * 1000;
+            tv.tv_usec = ((__suseconds_t) timeout_ms % 1000) * 1000;
         }
 
         int ret = select(fd + 1, NULL, &wfds, NULL, tv_p);
         if (ret == 0) {
             return 0;
         }
-        else if (ret == 1) {
+
+        if (ret == 1) {
             ssize_t w = write(fd, buf + total, count);
             if (w <= 0)
                 return -1;
-            else {
-                total += w;
-            }
+
+            total += w;
         }
         else
             return -1;
@@ -170,7 +171,7 @@ nmbs_platform_conf* platform_conf_socket_client(nmbs_transport transport) {
 }
 
 
-bool is_server_listen_thread_stopped() {
+bool is_server_listen_thread_stopped(void) {
     bool stopped = false;
     expect(pthread_mutex_lock(&server_stopped_m) == 0);
     stopped = server_stopped;
@@ -179,7 +180,8 @@ bool is_server_listen_thread_stopped() {
 }
 
 
-void* server_listen_thread() {
+void* server_listen_thread(void* arg) {
+    UNUSED_PARAM(arg);
     while (true) {
         if (is_server_listen_thread_stopped())
             break;
@@ -190,8 +192,7 @@ void* server_listen_thread() {
     return NULL;
 }
 
-
-void stop_client_and_server() {
+void stop_client_and_server(void) {
     if (!is_server_listen_thread_stopped()) {
         expect(pthread_mutex_lock(&server_stopped_m) == 0);
         server_stopped = true;