Add support for file descriptors in Java bindings

CMakeLists.txt

@@ -79,6 +79,7 @@ set(QSP_SOURCES
 	qsp/bindings/default/qsp_default.h
 	qsp/bindings/java/java_callbacks.c
 	qsp/bindings/java/java_control.c
+	qsp/bindings/java/java_files.c
 	qsp/bindings/java/qsp_java.h
 	qsp/bindings/qsp.h
 	qsp/actions.c qsp/actions.h

qsp/bindings/java/QSPLib.java

@@ -135,9 +135,16 @@ public class ErrorInfo {
     public native boolean execUserInput(boolean toRefreshUI);
     public native ErrorInfo getLastErrorData();
     public native String getErrorDesc(int errorNum);
+
     public native boolean loadGameWorldFromData(byte[] data, boolean isNewGame);
+    public native boolean loadGameWorldFromFD(int fileDescriptor, boolean isNewGame);
+
     public native byte[] saveGameAsData(boolean toRefreshUI);
+    public native boolean saveGameByFD(int fileDescriptor, boolean toRefreshUI);
+
     public native boolean openSavedGameFromData(byte[] data, boolean toRefreshUI);
+    public native boolean openSavedGameFromFD(int fileDescriptor, boolean toRefreshUI);
+
     public native boolean restartGame(boolean toRefreshUI);
 
     // Callbacks

qsp/bindings/java/java_control.c

@@ -444,6 +444,64 @@ JNIEXPORT jstring JNICALL Java_com_libqsp_jni_QSPLib_getErrorDesc(JNIEnv *env, j
 /* ------------------------------------------------------------ */
 /* Game controls */
 
+#ifdef __ANDROID__
+
+#include <unistd.h>
+
+/* Loading a new game from FileDescriptor */
+JNIEXPORT jboolean JNICALL Java_com_libqsp_jni_QSPLib_loadGameWorldFromFD(JNIEnv *env, jobject api, jint fileDescriptor, jboolean isNewGame)
+{
+	if (fileDescriptor < 0) return QSP_FALSE;
+	const int native_fd = dup(fileDescriptor);
+	if (native_fd < 0) return QSP_FALSE;
+    FILE *f = fdopen(native_fd, "rb");
+	if (f == NULL)
+	{
+		close(native_fd);
+		return QSP_FALSE;
+	}
+	QSP_BOOL res = qspOpenQuestFromFILE(f, isNewGame);
+	fclose(f);
+    return res;
+}
+/* Saving state by FileDescriptor */
+JNIEXPORT jboolean JNICALL Java_com_libqsp_jni_QSPLib_saveGameByFD(JNIEnv *env, jobject api, jint fileDescriptor, jboolean toRefreshUI)
+{
+	if (fileDescriptor < 0) return QSP_FALSE;
+    const int native_fd = dup(fileDescriptor);
+	if (native_fd < 0) return QSP_FALSE;
+	FILE *f = fdopen(native_fd, "wb");
+	if (!f) {
+		close(native_fd);
+		return QSP_FALSE;
+	}
+    qspPrepareExecution(QSP_FALSE);
+    QSP_BOOL res = qspSaveGameStatusToFILE(f);
+    fclose(f);
+    if (toRefreshUI) qspCallRefreshInt(QSP_FALSE);
+    return res;
+}
+/* Loading state from FileDescriptor */
+JNIEXPORT jboolean JNICALL Java_com_libqsp_jni_QSPLib_openSavedGameFromFD(JNIEnv *env, jobject api, jint fileDescriptor, jboolean toRefreshUI)
+{
+	if (fileDescriptor < 0) return QSP_FALSE;
+	const int native_fd = dup(fileDescriptor);
+	if (native_fd < 0) return QSP_FALSE;
+	FILE *f = fdopen(native_fd, "rb");
+	if (!f)
+	{
+		close(native_fd);
+		return QSP_FALSE;
+	}
+    qspPrepareExecution(QSP_FALSE);
+	QSP_BOOL res = qspOpenGameStatusFromFILE(f);
+	fclose(f);
+    if (!res) return JNI_FALSE;
+    if (qspErrorNum) return JNI_FALSE;
+    if (toRefreshUI) qspCallRefreshInt(QSP_FALSE);
+    return JNI_TRUE;
+}
+#endif
 /* Load game from data */
 JNIEXPORT jboolean JNICALL Java_com_libqsp_jni_QSPLib_loadGameWorldFromData(JNIEnv *env, jobject api, jbyteArray data, jboolean isNewGame)
 {

qsp/bindings/java/java_files.c

@@ -0,0 +1,76 @@
+#include "../../declarations.h"
+
+#ifdef _JAVA_BINDING
+
+#include "../../errors.h"
+#include "../../game.h"
+
+QSP_BOOL qspOpenQuestFromFILE(FILE *f, const QSP_BOOL isNewGame)
+{
+    fseek(f, 0, SEEK_END);
+    const int fileSize = ftell(f);
+
+    char *buf = malloc(fileSize);
+    if (buf == NULL) return QSP_FALSE;
+
+    fseek(f, 0, SEEK_SET);
+    fread(buf, 1, fileSize, f);
+
+    QSP_BOOL res = qspOpenGame(buf, fileSize, isNewGame);
+    free(buf);
+
+    return res;
+}
+
+QSP_BOOL qspOpenGameStatusFromFILE(FILE *f)
+{
+    fseek(f, 0, SEEK_END);
+    const int fileSize = ftell(f);
+
+    char *buf = malloc(fileSize);
+    if (buf == NULL) return QSP_FALSE;
+
+    fseek(f, 0, SEEK_SET);
+    fread(buf, 1, fileSize, f);
+
+    QSP_BOOL res = qspOpenGameStatus(buf, fileSize);
+    free(buf);
+
+    return res;
+}
+
+QSP_BOOL qspSaveGameStatusToFILE(FILE *f)
+{
+    void *dataBuf;
+    int dataBufSize = 64 * 1024;
+    QSP_BOOL res = QSP_FALSE;
+
+    dataBuf = malloc(dataBufSize);
+    if (dataBuf == NULL) return QSP_FALSE;
+
+    while (1)
+    {
+        if (qspSaveGameStatus(dataBuf, &dataBufSize, QSP_TRUE))
+        {
+            res = QSP_TRUE;
+            break;
+        }
+        if (!dataBufSize)
+        {
+            free(dataBuf);
+            return QSP_FALSE;
+        }
+        dataBufSize += QSP_SAVEDGAMEDATAEXTRASPACE;
+        dataBuf = realloc(dataBuf, dataBufSize);
+    }
+
+    if (res)
+    {
+        fwrite(dataBuf, 1, dataBufSize, f);
+    }
+
+    free(dataBuf);
+    return res;
+}
+
+#endif

qsp/bindings/java/qsp_java.h

@@ -67,4 +67,8 @@
     JNIListItem qspToJavaObjectItem(JNIEnv *env, QSPString name, QSPString title, QSPString image);
     void qspReleaseJavaListItem(JNIEnv *env, JNIListItem *listItem);
 
+    QSP_BOOL qspOpenQuestFromFILE(FILE *, QSP_BOOL);
+    QSP_BOOL qspSaveGameStatusToFILE(FILE *);
+    QSP_BOOL qspOpenGameStatusFromFILE(FILE *);
+
 #endif