From 715a73a989bd2529c0617e300389890f47488018 Mon Sep 17 00:00:00 2001
From: YAMAMOTO Takashi <yamamoto@midokura.com>
Date: Mon, 6 Sep 2021 11:22:26 +0900
Subject: [PATCH] Replace #ifdef an #ifndef with #if defined() and #if
 !defined()

Just for consistency. No functional changes are intended.

I didn't touch ones in the docs because I'm not sure if it's
appropriate to manually edit these files.
---
 examples/templates/bearssl_sockets.h |  4 ++--
 examples/templates/bio_sockets.h     |  4 ++--
 examples/templates/mbedtls_sockets.h |  2 +-
 examples/templates/openssl_sockets.h |  4 ++--
 examples/templates/posix_sockets.h   |  2 +-
 include/mqtt.h                       |  8 ++++----
 include/mqtt_pal.h                   | 14 +++++++-------
 src/mqtt_pal.c                       |  2 +-
 8 files changed, 20 insertions(+), 20 deletions(-)

diff --git a/examples/templates/bearssl_sockets.h b/examples/templates/bearssl_sockets.h
index 2181fcd..e0c138c 100644
--- a/examples/templates/bearssl_sockets.h
+++ b/examples/templates/bearssl_sockets.h
@@ -1,4 +1,4 @@
-#ifndef __BEARSSL_SOCKET_TEMPLATE_H__
+#if !defined(__BEARSSL_SOCKET_TEMPLATE_H__)
 #define __BEARSSL_SOCKET_TEMPLATE_H__
 
 #include <sys/socket.h>
@@ -136,4 +136,4 @@ int close_socket(bearssl_context *ctx) {
     return rc;
 }
 
-#endif
\ No newline at end of file
+#endif
diff --git a/examples/templates/bio_sockets.h b/examples/templates/bio_sockets.h
index 78acd60..b5a146a 100644
--- a/examples/templates/bio_sockets.h
+++ b/examples/templates/bio_sockets.h
@@ -1,4 +1,4 @@
-#ifndef __BIO_SOCKET_TEMPLATE_H__
+#if !defined(__BIO_SOCKET_TEMPLATE_H__)
 #define __BIO_SOCKET_TEMPLATE_H__
 
 #include <openssl/bio.h>
@@ -25,4 +25,4 @@ BIO* open_nb_socket(const char* addr, const char* port) {
     return bio; 
 }
 
-#endif
\ No newline at end of file
+#endif
diff --git a/examples/templates/mbedtls_sockets.h b/examples/templates/mbedtls_sockets.h
index f14ffef..56b4c18 100644
--- a/examples/templates/mbedtls_sockets.h
+++ b/examples/templates/mbedtls_sockets.h
@@ -1,4 +1,4 @@
-#ifndef __MBEDTLS_SOCKET_TEMPLATE_H__
+#if !defined(__MBEDTLS_SOCKET_TEMPLATE_H__)
 #define __MBEDTLS_SOCKET_TEMPLATE_H__
 
 #include <inttypes.h>
diff --git a/examples/templates/openssl_sockets.h b/examples/templates/openssl_sockets.h
index c826036..89056cc 100644
--- a/examples/templates/openssl_sockets.h
+++ b/examples/templates/openssl_sockets.h
@@ -1,4 +1,4 @@
-#ifndef __OPENSSL_SOCKET_TEMPLATE_H__
+#if !defined(__OPENSSL_SOCKET_TEMPLATE_H__)
 #define __OPENSSL_SOCKET_TEMPLATE_H__
 
 #include <openssl/bio.h>
@@ -49,4 +49,4 @@ void open_nb_socket(BIO** bio, SSL_CTX** ssl_ctx, const char* addr, const char*
     }
 }
 
-#endif
\ No newline at end of file
+#endif
diff --git a/examples/templates/posix_sockets.h b/examples/templates/posix_sockets.h
index f469d65..6b254a2 100644
--- a/examples/templates/posix_sockets.h
+++ b/examples/templates/posix_sockets.h
@@ -1,4 +1,4 @@
-#ifndef __POSIX_SOCKET_TEMPLATE_H__
+#if !defined(__POSIX_SOCKET_TEMPLATE_H__)
 #define __POSIX_SOCKET_TEMPLATE_H__
 
 #include <stdio.h>
diff --git a/include/mqtt.h b/include/mqtt.h
index 13911ee..93cc73c 100644
--- a/include/mqtt.h
+++ b/include/mqtt.h
@@ -1,4 +1,4 @@
-#ifndef __MQTT_H__
+#if !defined(__MQTT_H__)
 #define __MQTT_H__
 
 /*
@@ -25,7 +25,7 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 */
 
-#ifdef __cplusplus
+#if defined(__cplusplus)
 extern "C" {
 #endif
 
@@ -35,7 +35,7 @@ extern "C" {
 // If MQTTC_PAL_FILE is used, none of the default utils will be emitted and must be
 // provided by the config file. To start, I would suggest copying mqtt_pal.h
 // and modifying as needed.
-#ifdef MQTTC_PAL_FILE
+#if defined(MQTTC_PAL_FILE)
 #define MQTTC_STR2(x) #x
 #define MQTTC_STR(x) MQTTC_STR2(x)
 #include MQTTC_STR(MQTTC_PAL_FILE)
@@ -1615,7 +1615,7 @@ enum MQTTErrors mqtt_disconnect(struct mqtt_client *client);
  */
 enum MQTTErrors mqtt_reconnect(struct mqtt_client *client);
 
-#ifdef __cplusplus
+#if defined(__cplusplus)
 }
 #endif
 
diff --git a/include/mqtt_pal.h b/include/mqtt_pal.h
index 85c32cd..8ee8b3d 100644
--- a/include/mqtt_pal.h
+++ b/include/mqtt_pal.h
@@ -1,4 +1,4 @@
-#ifndef __MQTT_PAL_H__
+#if !defined(__MQTT_PAL_H__)
 #define __MQTT_PAL_H__
 
 /*
@@ -25,7 +25,7 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 */
 
-#ifdef __cplusplus
+#if defined(__cplusplus)
 extern "C" {
 #endif
 
@@ -89,8 +89,8 @@ extern "C" {
     #define MQTT_PAL_MUTEX_LOCK(mtx_ptr) pthread_mutex_lock(mtx_ptr)
     #define MQTT_PAL_MUTEX_UNLOCK(mtx_ptr) pthread_mutex_unlock(mtx_ptr)
 
-    #ifndef MQTT_USE_CUSTOM_SOCKET_HANDLE
-        #ifdef MQTT_USE_MBEDTLS
+    #if !defined(MQTT_USE_CUSTOM_SOCKET_HANDLE)
+        #if defined(MQTT_USE_MBEDTLS)
             struct mbedtls_ssl_context;
             typedef struct mbedtls_ssl_context *mqtt_pal_socket_handle;
         #elif defined(MQTT_USE_WOLFSSL)
@@ -139,8 +139,8 @@ extern "C" {
     #define MQTT_PAL_MUTEX_UNLOCK(mtx_ptr) LeaveCriticalSection(mtx_ptr)
 
 
-    #ifndef MQTT_USE_CUSTOM_SOCKET_HANDLE
-        #ifdef MQTT_USE_BIO
+    #if !defined(MQTT_USE_CUSTOM_SOCKET_HANDLE)
+        #if defined(MQTT_USE_BIO)
             #include <openssl/bio.h>
             typedef BIO* mqtt_pal_socket_handle;
         #else
@@ -176,7 +176,7 @@ ssize_t mqtt_pal_sendall(mqtt_pal_socket_handle fd, const void* buf, size_t len,
  */
 ssize_t mqtt_pal_recvall(mqtt_pal_socket_handle fd, void* buf, size_t bufsz, int flags);
 
-#ifdef __cplusplus
+#if defined(__cplusplus)
 }
 #endif
 
diff --git a/src/mqtt_pal.c b/src/mqtt_pal.c
index d83b3f6..ae0231e 100644
--- a/src/mqtt_pal.c
+++ b/src/mqtt_pal.c
@@ -32,7 +32,7 @@ SOFTWARE.
  */
 
 
-#ifdef MQTT_USE_MBEDTLS
+#if defined(MQTT_USE_MBEDTLS)
 #include <mbedtls/ssl.h>
 
 ssize_t mqtt_pal_sendall(mqtt_pal_socket_handle fd, const void* buf, size_t len, int flags) {