/*

 * Copyright (c) 2004, 2018, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

#include <stdlib.h>

#include <string.h>

#include <windows.h>

#include <locale.h>

#include "jni.h"

#include "jni_util.h"

static void getParent(const TCHAR *path, TCHAR *dest) {

    char* lastSlash = max(strrchr(path, '\\'), strrchr(path, '/'));

    if (lastSlash == NULL) {

        *dest = 0;

        return;

    }

    if (path != dest)

        strcpy(dest, path);

    *lastSlash = 0;

}

void* getProcessHandle() {

    return (void*)GetModuleHandle(NULL);

}

/*

 * Windows symbols can be simple like JNI_OnLoad or __stdcall format

 * like _JNI_OnLoad@8. We need to handle both.

 */

void buildJniFunctionName(const char *sym, const char *cname,

                          char *jniEntryName) {

    if (cname != NULL) {

        char *p = strrchr(sym, '@');

        if (p != NULL && p != sym) {

            // sym == _JNI_OnLoad@8

            strncpy(jniEntryName, sym, (p - sym));

            jniEntryName[(p-sym)] = '\0';

            // jniEntryName == _JNI_OnLoad

            strcat(jniEntryName, "_");

            strcat(jniEntryName, cname);

            strcat(jniEntryName, p);

            //jniEntryName == _JNI_OnLoad_cname@8

        } else {

            strcpy(jniEntryName, sym);

            strcat(jniEntryName, "_");

            strcat(jniEntryName, cname);

        }

    } else {

        strcpy(jniEntryName, sym);

    }

    return;

}

JNIEXPORT size_t JNICALL

getLastErrorString(char *buf, size_t len) {

    DWORD errval;

    if ((errval = GetLastError()) != 0) {

        // DOS error

        size_t n = (size_t)FormatMessage(

                FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_IGNORE_INSERTS,

                NULL,

                errval,

                0,

                buf,

                (DWORD)len,

                NULL);

        if (n > 3) {

            // Drop final '.', CR, LF

            if (buf[n - 1] == '\n') n--;

            if (buf[n - 1] == '\r') n--;

            if (buf[n - 1] == '.') n--;

            buf[n] = '\0';

        }

        return n;

    }

    // C runtime error that has no corresponding DOS error code

    if (errno == 0 || len < 1) return 0;

    return strerror_s(buf, len, errno);

}

JNIEXPORT int JNICALL

getErrorString(int err, char *buf, size_t len)

{

    int ret = 0;

    if (err == 0 || len < 1) return 0;

    ret = strerror_s(buf, len, err);

    return ret;

}