/*

 * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 *   - Redistributions of source code must retain the above copyright

 *     notice, this list of conditions and the following disclaimer.

 *

 *   - Redistributions in binary form must reproduce the above copyright

 *     notice, this list of conditions and the following disclaimer in the

 *     documentation and/or other materials provided with the distribution.

 *

 *   - Neither the name of Oracle nor the names of its

 *     contributors may be used to endorse or promote products derived

 *     from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS

 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,

 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF

 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING

 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS

 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

/*

 * This source code is provided to illustrate the usage of a given feature

 * or technique and has been deliberately simplified. Additional steps

 * required for a production-quality application, such as security checks,

 * input validation and proper error handling, might not be present in

 * this sample code.

 */

// To ensure winsock2.h is used, it has to be included ahead of

// windows.h, which includes winsock.h by default.

#include <winsock2.h>

#include <windows.h>

#include <io.h>

#include <sys/types.h>

#include <sys/stat.h>

#include <mmsystem.h>

#include <fcntl.h>

#include <process.h>

#include "jni.h"

#include "hprof.h"

int

md_getpid(void)

{

    static int pid = -1;

    if ( pid >= 0 ) {

        return pid;

    }

    pid = getpid();

    return pid;

}

void

md_sleep(unsigned seconds)

{

    Sleep((DWORD)seconds*1000);

}

void

md_init(void)

{

}

int

md_connect(char *hostname, unsigned short port)

{

    struct hostent *hentry;

    struct sockaddr_in s;

    int fd;

    /* find remote host's addr from name */

    if ((hentry = gethostbyname(hostname)) == NULL) {

        return -1;

    }

    (void)memset((char *)&s, 0, sizeof(s));

    /* set remote host's addr; its already in network byte order */

    (void)memcpy(&s.sin_addr.s_addr, *(hentry->h_addr_list),

           (int)sizeof(s.sin_addr.s_addr));

    /* set remote host's port */

    s.sin_port = htons(port);

    s.sin_family = AF_INET;

    /* create a socket */

    fd = (int)socket(AF_INET, SOCK_STREAM, 0);

    if (INVALID_SOCKET == fd) {

        return 0;

    }

    /* now try connecting */

    if (SOCKET_ERROR == connect(fd, (struct sockaddr*)&s, sizeof(s))) {

        closesocket(fd);

        return 0;

    }

    return fd;

}

int

md_recv(int f, char *buf, int len, int option)

{

    return recv(f, buf, len, option);

}

int

md_shutdown(int filedes, int option)

{

    return shutdown(filedes, option);

}

int

md_open(const char *filename)

{

    return open(filename, O_RDONLY);

}

int

md_open_binary(const char *filename)

{

    return open(filename, O_RDONLY|O_BINARY);

}

int

md_creat(const char *filename)

{

    return open(filename, O_CREAT | O_WRONLY | O_TRUNC,

                             _S_IREAD | _S_IWRITE);

}

int

md_creat_binary(const char *filename)

{

    return open(filename, O_CREAT | O_WRONLY | O_TRUNC | O_BINARY,

                            _S_IREAD | _S_IWRITE);

}

jlong

md_seek(int filedes, jlong pos)

{

    jlong new_pos;

    if ( pos == (jlong)-1 ) {

        new_pos = _lseeki64(filedes, 0L, SEEK_END);

    } else {

        new_pos = _lseeki64(filedes, pos, SEEK_SET);

    }

    return new_pos;

}

void

md_close(int filedes)

{

    (void)closesocket(filedes);

}

int

md_send(int s, const char *msg, int len, int flags)

{

    return send(s, msg, len, flags);

}

int

md_read(int filedes, void *buf, int nbyte)

{

    return read(filedes, buf, nbyte);

}

int

md_write(int filedes, const void *buf, int nbyte)

{

    return write(filedes, buf, nbyte);

}

jlong

md_get_microsecs(void)

{

    return (jlong)(timeGetTime())*(jlong)1000;

}

#define FT2JLONG(ft) \

        ((jlong)(ft).dwHighDateTime << 32 | (jlong)(ft).dwLowDateTime)

jlong

md_get_timemillis(void)

{

    static jlong fileTime_1_1_70 = 0;

    SYSTEMTIME st0;

    FILETIME   ft0;

    if (fileTime_1_1_70 == 0) {

        /* Initialize fileTime_1_1_70 -- the Win32 file time of midnight

         * 1/1/70.

         */

        memset(&st0, 0, sizeof(st0));

        st0.wYear  = 1970;

        st0.wMonth = 1;

        st0.wDay   = 1;

        SystemTimeToFileTime(&st0, &ft0);

        fileTime_1_1_70 = FT2JLONG(ft0);

    }

    GetSystemTime(&st0);

    SystemTimeToFileTime(&st0, &ft0);

    return (FT2JLONG(ft0) - fileTime_1_1_70) / 10000;

}

jlong

md_get_thread_cpu_timemillis(void)

{

    return md_get_timemillis();

}

HINSTANCE hJavaInst;

static int nError = 0;

BOOL WINAPI

DllMain(HINSTANCE hinst, DWORD reason, LPVOID reserved)

{

    WSADATA wsaData;

    switch (reason) {

        case DLL_PROCESS_ATTACH:

            hJavaInst = hinst;

            nError = WSAStartup(MAKEWORD(2,0), &wsaData);

            break;

        case DLL_PROCESS_DETACH:

            WSACleanup();

            hJavaInst = NULL;

        default:

            break;

    }

    return TRUE;

}

void

md_get_prelude_path(char *path, int path_len, char *filename)

{

    char libdir[FILENAME_MAX+1];

    char *lastSlash;

    GetModuleFileName(hJavaInst, libdir, FILENAME_MAX);

    /* This is actually in the bin directory, so move above bin for lib */

    lastSlash = strrchr(libdir, '\\');

    if ( lastSlash != NULL ) {

        *lastSlash = '\0';

    }

    lastSlash = strrchr(libdir, '\\');

    if ( lastSlash != NULL ) {

        *lastSlash = '\0';

    }

    (void)md_snprintf(path, path_len, "%s\\lib\\%s", libdir, filename);

}

int

md_vsnprintf(char *s, int n, const char *format, va_list ap)

{

    return _vsnprintf(s, n, format, ap);

}

int

md_snprintf(char *s, int n, const char *format, ...)

{

    int ret;

    va_list ap;

    va_start(ap, format);

    ret = md_vsnprintf(s, n, format, ap);

    va_end(ap);

    return ret;

}

void

md_system_error(char *buf, int len)

{

    long errval;

    errval = GetLastError();

    buf[0] = '\0';

    if (errval != 0) {

        int n;

        n = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_IGNORE_INSERTS,

                              NULL, errval,

                              0, buf, 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';

        }

    }

}

unsigned

md_htons(unsigned short s)

{

    return htons(s);

}

unsigned

md_htonl(unsigned l)

{

    return htonl(l);

}

unsigned

md_ntohs(unsigned short s)

{

    return ntohs(s);

}

unsigned

md_ntohl(unsigned l)

{

    return ntohl(l);

}

static int

get_last_error_string(char *buf, int len)

{

    long errval;

    errval = GetLastError();

    if (errval != 0) {

        /* DOS error */

        int n;

        n = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_IGNORE_INSERTS,

                              NULL, errval,

                              0, buf, 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;

    }

    if (errno != 0) {

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

        const char *s;

        int         n;

        s = strerror(errno);

        n = (int)strlen(s);

        if (n >= len) {

            n = len - 1;

        }

        (void)strncpy(buf, s, n);

        buf[n] = '\0';

        return n;

    }

    return 0;

}

static void dll_build_name(char* buffer, size_t buflen,

                           const char* paths, const char* fname) {

    char *path, *paths_copy, *next_token;

    paths_copy = strdup(paths);

    if (paths_copy == NULL) {

        return;

    }

    next_token = NULL;

    path = strtok_s(paths_copy, ";", &next_token);

    while (path != NULL) {

        _snprintf(buffer, buflen, "%s\\%s.dll", path, fname);

        if (_access(buffer, 0) == 0) {

            break;

        }

        *buffer = '\0';

        path = strtok_s(NULL, ";", &next_token);

    }

    free(paths_copy);

}

/* Build a machine dependent library name out of a path and file name.  */

void

md_build_library_name(char *holder, int holderlen, const char *pname, const char *fname)

{

    int   pnamelen;

    pnamelen = pname ? (int)strlen(pname) : 0;

    *holder = '\0';

    /* Quietly truncates on buffer overflow. Should be an error. */

    if (pnamelen + strlen(fname) + 10 > (unsigned int)holderlen) {

        return;

    }

    if (pnamelen == 0) {

        sprintf(holder, "%s.dll", fname);

    } else {

      dll_build_name(holder, holderlen, pname, fname);

    }

}

void *

md_load_library(const char * name, char *err_buf, int err_buflen)

{

    void *result;

    result = LoadLibrary(name);

    if (result == NULL) {

        /* Error message is pretty lame, try to make a better guess. */

        long errcode;

        errcode = GetLastError();

        if (errcode == ERROR_MOD_NOT_FOUND) {

            strncpy(err_buf, "Can't find dependent libraries", err_buflen-2);

            err_buf[err_buflen-1] = '\0';

        } else {

            get_last_error_string(err_buf, err_buflen);

        }

    }

    return result;

}

void

md_unload_library(void *handle)

{

    FreeLibrary(handle);

}

void *

md_find_library_entry(void *handle, const char *name)

{

    return GetProcAddress(handle, name);

}