#include "jim.h"
#include "jimautoconf.h"

#if defined(HAVE_DLOPEN_COMPAT)
void *dlopen(const char *path, int mode)
{
    JIM_NOTUSED(mode);

    return (void *)LoadLibraryA(path);
}

int dlclose(void *handle)
{
    FreeLibrary((HANDLE)handle);
    return 0;
}

void *dlsym(void *handle, const char *symbol)
{
    return GetProcAddress((HMODULE)handle, symbol);
}

char *dlerror(void)
{
    static char msg[121];
    FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM, NULL, GetLastError(),
                   LANG_NEUTRAL, msg, sizeof(msg) - 1, NULL);
    return msg;
}
#endif

#ifdef _MSC_VER
/* POSIX gettimeofday() compatibility for WIN32 */
int gettimeofday(struct timeval *tv, void *unused)
{
    struct _timeb tb;

    _ftime(&tb);
    tv->tv_sec = tb.time;
    tv->tv_usec = tb.millitm * 1000;

    return 0;
}

/* Posix dirent.h compatiblity layer for WIN32.
 * Copyright Kevlin Henney, 1997, 2003. All rights reserved.
 * Copyright Salvatore Sanfilippo ,2005.
 *
 * Permission to use, copy, modify, and distribute this software and its
 * documentation for any purpose is hereby granted without fee, provided
 * that this copyright and permissions notice appear in all copies and
 * derivatives.
 *
 * This software is supplied "as is" without express or implied warranty.
 * This software was modified by Salvatore Sanfilippo for the Jim Interpreter.
 */

DIR *opendir(const char *name)
{
    DIR *dir = 0;

    if (name && name[0]) {
        size_t base_length = strlen(name);
        const char *all =       /* search pattern must end with suitable wildcard */
            strchr("/\\", name[base_length - 1]) ? "*" : "/*";

        if ((dir = (DIR *) Jim_Alloc(sizeof *dir)) != 0 &&
            (dir->name = (char *)Jim_Alloc(base_length + strlen(all) + 1)) != 0) {
            strcat(strcpy(dir->name, name), all);

            if ((dir->handle = (long)_findfirst(dir->name, &dir->info)) != -1)
                dir->result.d_name = 0;
            else {              /* rollback */
                Jim_Free(dir->name);
                Jim_Free(dir);
                dir = 0;
            }
        }
        else {                  /* rollback */
            Jim_Free(dir);
            dir = 0;
            errno = ENOMEM;
        }
    }
    else {
        errno = EINVAL;
    }
    return dir;
}

int closedir(DIR * dir)
{
    int result = -1;

    if (dir) {
        if (dir->handle != -1)
            result = _findclose(dir->handle);
        Jim_Free(dir->name);
        Jim_Free(dir);
    }
    if (result == -1)           /* map all errors to EBADF */
        errno = EBADF;
    return result;
}

struct dirent *readdir(DIR * dir)
{
    struct dirent *result = 0;

    if (dir && dir->handle != -1) {
        if (!dir->result.d_name || _findnext(dir->handle, &dir->info) != -1) {
            result = &dir->result;
            result->d_name = dir->info.name;
        }
    }
    else {
        errno = EBADF;
    }
    return result;
}
#endif