(svn r17214) -Add [NoAI]: GetAPIVersion() as optional function in info.nut. Return "0.7" to get an api compatible (as much as possible) with the 0.7 api or "0.8" to get the latest api.

-Change [NoAI]: move all deprecated functions to a separate squirrel script that is only loaded if an AI requests an old API version.

1 files changed, 18 insertions, 0 deletions

diff --git a/src/ai/ai_info.cpp b/src/ai/ai_info.cpp
index 0ae9582ed..22e2dcded 100644
--- a/src/ai/ai_info.cpp
+++ b/src/ai/ai_info.cpp
@@ -12,6 +12,7 @@
 #include "ai_scanner.hpp"
 #include "../settings_type.h"
 #include "../openttd.h"
+#include "../debug.h"
 
 AIConfigItem _start_date_config = {
 	"start_date",
@@ -42,6 +43,11 @@ AILibrary::~AILibrary()
 	return 0;
 }
 
+static bool CheckAPIVersion(const char *api_version)
+{
+	return strcmp(api_version, "0.7") == 0 || strcmp(api_version, "0.8") == 0;
+}
+
 /* static */ SQInteger AIInfo::Constructor(HSQUIRRELVM vm)
 {
 	/* Get the AIInfo */
@@ -72,6 +78,16 @@ AILibrary::~AILibrary()
 	} else {
 		info->use_as_random = true;
 	}
+	/* Try to get the API version the AI is written for. */
+	if (info->engine->MethodExists(*info->SQ_instance, "GetAPIVersion")) {
+		if (!info->engine->CallStringMethodStrdup(*info->SQ_instance, "GetAPIVersion", &info->api_version)) return SQ_ERROR;
+		if (!CheckAPIVersion(info->api_version)) {
+			DEBUG(ai, 1, "Loading info.nut from (%s.%d): GetAPIVersion returned invalid version", info->GetName(), info->GetVersion());
+			return SQ_ERROR;
+		}
+	} else {
+		info->api_version = strdup("0.7");
+	}
 
 	/* Remove the link to the real instance, else it might get deleted by RegisterAI() */
 	sq_setinstanceup(vm, 2, NULL);
@@ -86,6 +102,7 @@ AILibrary::~AILibrary()
 	SQUserPointer instance;
 	sq_getinstanceup(vm, 2, &instance, 0);
 	AIInfo *info = (AIInfo *)instance;
+	info->api_version = NULL;
 
 	SQInteger res = AIFileInfo::Constructor(vm, info);
 	if (res != 0) return res;
@@ -116,6 +133,7 @@ AIInfo::~AIInfo()
 		}
 	}
 	this->config_list.clear();
+	free((void*)this->api_version);
 }
 
 bool AIInfo::CanLoadFromVersion(int version) const