Pass success flag to plugins, include changes

Author: CrazyHackGUT

package/scripting/include/env_variables.inc

@@ -40,9 +40,11 @@
  * @param   szName          The environment variable name.
  * @param   szBuffer        Buffer where value should be written.
  * @param   iBufferLength   Maximum size of the buffer.
+ * @param   bExists         The ref to variable where will be written
+ *                          information about presence environment variable.
  * @return                  The written bytes count.
  */
-native int GetEnvironmentVariable(const char[] szName, char[] szBuffer, int iBufferLength);
+native int GetEnvironmentVariable(const char[] szName, char[] szBuffer, int iBufferLength, bool &bExists = false);
 
 /**
  * Do not edit below this line!
@@ -62,3 +64,10 @@ public Extension __ext_env_variables =
 	required = 0,
 #endif
 };
+
+#if !defined REQUIRE_EXTENSIONS
+public void __ext_env_variables_SetNTVOptional()
+{
+    MarkNativeAsOptional("GetEnvironmentVariable");
+}
+#endif

src/natives.cpp

@@ -40,6 +40,13 @@ static cell_t sm_getenv(SourcePawn::IPluginContext *pContext, const cell_t *para
     char *value = getenv(name);
 
     cell_t is_success = (value != NULL) ? 1 : 0;
+    if (params[0] > 3)
+    {
+        cell_t *addr;
+        pContext->LocalToPhysAddr(params[4], &addr);
+        *addr = is_success;
+    }
+
     if (value != NULL)
     {
         size_t numBytes;

src/smsdk_config.h

@@ -40,7 +40,7 @@
 /* Basic information exposed publicly */
 #define SMEXT_CONF_NAME			"Environment Variables"
 #define SMEXT_CONF_DESCRIPTION	"Extension what implements getenv() for SourcePawn plugins"
-#define SMEXT_CONF_VERSION		"1.0.0.0"
+#define SMEXT_CONF_VERSION		"1.0.0.1"
 #define SMEXT_CONF_AUTHOR		"CrazyHackGUT aka Kruzya"
 #define SMEXT_CONF_URL			"https://kruzya.me/"
 #define SMEXT_CONF_LOGTAG		"ENV"