feat: set up build for android

Signed-off-by: Sphericalkat <me@kat.bio>

.gitignore

@@ -0,0 +1 @@
+target

Makefile

@@ -0,0 +1,3 @@
+build:
+	go build -o target/linux-x86-64/libreadability.so -buildmode=c-shared main.go
+	strip target/linux-x86-64/libreadability.so

android.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/sh
+export NDK_PATH=/home/sphericalkat/Android/Sdk/ndk/27.0.11902837
+export TARGET=aarch64-linux-android
+export API=21
+
+export CC=$NDK_PATH/toolchains/llvm/prebuilt/linux-x86_64/bin/$TARGET$API-clang
+export STRIP=$NDK_PATH/toolchains/llvm/prebuilt/linux-x86_64/bin/llvm-strip
+export CXX=$NDK_PATH/toolchains/llvm/prebuilt/linux-x86_64/bin/$TARGET$API-clang++
+export CGO_CFLAGS="-I$NDK_PATH/toolchains/llvm/prebuilt/linux-x86_64/sysroot/usr/include"
+export CGO_CPPFLAGS="-I$NDK_PATH/toolchains/llvm/prebuilt/linux-x86_64/sysroot/usr/include"
+export CGO_CXXFLAGS="-I$NDK_PATH/toolchains/llvm/prebuilt/linux-x86_64/sysroot/usr/include"
+export CGO_LDFLAGS="-L$NDK_PATH/toolchains/llvm/prebuilt/linux-x86_64/sysroot/usr/lib"
+
+CGO_ENABLED=1 GOOS=android GOARCH=arm64 go build -o target/android-arm64/libreadability.so -buildmode=c-shared main.go
+$STRIP target/android-arm64/libreadability.so

main.go

@@ -15,6 +15,8 @@ typedef struct {
 	char* text_content; // text content
 	char* language;
 	char* published_time;
+	char* err;
+	int success;
 } CArticle;
 */
 import "C"
@@ -26,10 +28,14 @@ import (
 )
 
 //export Parse
-func Parse(url string) (result C.CArticle, errorMsg *C.char) {
+func Parse(url *C.char) (result C.CArticle) {
-	article, err := readability.FromURL(url, 30*time.Second)
+	goURL := C.GoString(url)
+	article, err := readability.FromURL(goURL, 30*time.Second)
 	if err != nil {
-		return C.CArticle{}, C.CString(err.Error())
+		return C.CArticle{
+			err: C.CString(err.Error()),
+			success: 0,
+		}
 	}
 
 	return C.CArticle{
@@ -42,20 +48,44 @@ func Parse(url string) (result C.CArticle, errorMsg *C.char) {
 		favicon_url:  C.CString(article.Favicon),
 		content:      C.CString(article.Content),
 		text_content: C.CString(article.TextContent),
-	}, nil
+		err:		  nil,
+		success:      1,
+	}
 }
 
 //export FreeArticle
 func FreeArticle(article C.CArticle) {
+    if article.title != nil {
         C.free(unsafe.Pointer(article.title))
+    }
+    if article.author != nil {
         C.free(unsafe.Pointer(article.author))
+    }
+    if article.excerpt != nil {
         C.free(unsafe.Pointer(article.excerpt))
+    }
+    if article.site_name != nil {
         C.free(unsafe.Pointer(article.site_name))
+    }
+    if article.image_url != nil {
         C.free(unsafe.Pointer(article.image_url))
+    }
+    if article.favicon_url != nil {
         C.free(unsafe.Pointer(article.favicon_url))
+    }
+    if article.content != nil {
         C.free(unsafe.Pointer(article.content))
+    }
+    if article.text_content != nil {
         C.free(unsafe.Pointer(article.text_content))
+    }
+    if article.language != nil {
+        C.free(unsafe.Pointer(article.language))
+    }
+    if article.published_time != nil {
+        C.free(unsafe.Pointer(article.published_time))
+    }
 }
-
 func main() {
+
 }