Split out terminfo jni functions into a separate native library, so that curses/ncurses is not required to load the main native library.

src/main/cpp/generic_posix.cpp

@@ -0,0 +1,62 @@
+/*
+ * POSIX platform functions.
+ */
+#ifndef WIN32
+
+#include "native.h"
+#include "generic.h"
+#include <stdlib.h>
+#include <errno.h>
+#include <xlocale.h>
+#include <langinfo.h>
+#include <string.h>
+
+void mark_failed_with_errno(JNIEnv *env, const char* message, jobject result) {
+    mark_failed_with_code(env, message, errno, result);
+}
+
+char* java_to_char(JNIEnv *env, jstring string, jobject result) {
+    // TODO - share this code with nnn_getSystemInfo() below
+    // Empty string means load locale from environment.
+    locale_t locale = newlocale(LC_CTYPE_MASK, "", NULL);
+    if (locale == NULL) {
+        mark_failed_with_message(env, "could not create locale", result);
+        return NULL;
+    }
+
+    jstring encoding = env->NewStringUTF(nl_langinfo_l(CODESET, locale));
+    freelocale(locale);
+
+    jclass strClass = env->FindClass("java/lang/String");
+    jmethodID method = env->GetMethodID(strClass, "getBytes", "(Ljava/lang/String;)[B");
+    jbyteArray byteArray = (jbyteArray)env->CallObjectMethod(string, method, encoding);
+    size_t len = env->GetArrayLength(byteArray);
+    char* chars = (char*)malloc(len + 1);
+    env->GetByteArrayRegion(byteArray, 0, len, (jbyte*)chars);
+    chars[len] = 0;
+
+    return chars;
+}
+
+jstring char_to_java(JNIEnv* env, const char* chars, jobject result) {
+    // TODO - share this code with nnn_getSystemInfo() below
+    // Empty string means load locale from environment.
+    locale_t locale = newlocale(LC_CTYPE_MASK, "", NULL);
+    if (locale == NULL) {
+        mark_failed_with_message(env, "could not create locale", result);
+        return NULL;
+    }
+    jstring encoding = env->NewStringUTF(nl_langinfo_l(CODESET, locale));
+    freelocale(locale);
+
+    size_t len = strlen(chars);
+    jbyteArray byteArray = env->NewByteArray(len);
+    jbyte* bytes = env->GetByteArrayElements(byteArray, NULL);
+    memcpy(bytes, chars, len);
+    env->ReleaseByteArrayElements(byteArray, bytes, JNI_COMMIT);
+    jclass strClass = env->FindClass("java/lang/String");
+    jmethodID method = env->GetMethodID(strClass, "<init>", "([BLjava/lang/String;)V");
+    return (jstring)env->NewObject(strClass, method, byteArray, encoding);
+}
+
+#endif