extension init commit

README.md

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+# A3Web
+
+Arma 3 Realtime Map
+
+## To build extension
+
+```
+GOARCH=386 CGO_ENABLED=1 go build -o liba3web.so -buildmode=c-shared .
+```

extension/go.mod

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+module gitea.hijack.moe/huashui/a3web/extension
+
+go 1.13

extension/liba3web.go

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+package main
+
+/*
+  #include <stdlib.h>
+  #include <stdio.h>
+  #include <string.h>
+
+  typedef int(*callbackProc)(char const *name, char const *function, char const *data);
+
+  static inline int bridge_cb(callbackProc cb, char const *name, char const *function, char const *data) {
+	return cb(name, function, data);
+  }
+
+  static inline uint min(uint a, uint b) { return a < b ? a : b; }
+*/
+import "C"
+
+import (
+	"fmt"
+	"log"
+	"strings"
+	"unsafe"
+	"net/http"
+)
+
+var cb C.callbackProc
+var name = C.CString("a3web")
+var serverURL = "https://localhost"
+
+// RVExtensionRegisterCallback on extension load
+//export RVExtensionRegisterCallback
+func RVExtensionRegisterCallback(cbptr unsafe.Pointer) {
+	cb = C.callbackProc(cbptr)
+
+	log.Println("Calling callback function ……")
+	function := C.CString("registered")
+	defer C.free(unsafe.Pointer(function))
+	C.bridge_cb(cb, name, function, function)
+}
+
+// RVExtensionVersion on extension load
+//export RVExtensionVersion
+func RVExtensionVersion(output *C.char, outputsize C.size_t) {
+	version := C.CString("Version 0.1")
+	defer C.free(unsafe.Pointer(version))
+	var size = C.min(C.strlen(version)+1, outputsize-1)
+	C.strncpy(output, version, size)
+}
+
+// RVExtensionArgs STRING callExtension ARRAY
+//export RVExtensionArgs
+func RVExtensionArgs(output *C.char, outputsize C.size_t, function *C.char, argv **C.char, argc C.int) {
+	var offset = unsafe.Sizeof(uintptr(0))
+	var out []string
+	for index := C.int(0); index < argc; index++ {
+		out = append(out, C.GoString(*argv))
+		argv = (**C.char)(unsafe.Pointer(uintptr(unsafe.Pointer(argv)) + offset))
+	}
+	
+	go handleArgs(C.GoString(function), argc, out)
+}
+
+// RVExtension STRING callExtension STRING
+//export RVExtension
+func RVExtension(output *C.char, outputsize C.size_t, function *C.char) {
+	result := C.CString(fmt.Sprintf("Hello, %s!", C.GoString(function)))
+	defer C.free(unsafe.Pointer(result))
+	var size = C.min(C.strlen(result)+1, outputsize-1)
+	C.strncpy(output, result, size)
+}
+
+func main() {}
+
+func handleArgs(function string, argc C.int, argv []string) {
+	fns := strings.Split(strings.ToLower(function), ":")
+	if len(fns) == 3 && fns[0] == "http" && fns[1] == "post" {
+		resp, err := http.Post(serverURL + fns[2], "", strings.NewReader(argv[0]))
+		if err != nil {
+			log.Printf("Error Sending HTTP Request: %s", err)
+			return
+		}
+		resp.Body.Close()
+	}
+}