/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 *
 * ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code, released
 * Jan 28, 2003.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 2003
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Garrett Arch Blythe, 28-January-2003
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "mozce_internal.h"

#include <stdarg.h>

extern "C" {
#if 0
}
#endif


#define MAXFDS 100

typedef struct _fdtab_block
{
    int fd;
    FILE* file;
    
} _fdtab_block;


_fdtab_block _fdtab[MAXFDS];





void
_initfds()
{
    static int fdsinitialized = 0;
    
    if(fdsinitialized)
        return;
    
    for (int i = 0; i < MAXFDS; i++)
        _fdtab[i].fd = -1;
    
    fdsinitialized = 1;
}

int
_getnewfd()
{
    int i;
    
    for(i = 0; i < MAXFDS; i++)
    {
        if(_fdtab[i].fd == -1)
            return i;
    }
    
    return -1;
}




MOZCE_SHUNT_API int mozce_access(const char *path, int mode)
{
    MOZCE_PRECHECK
        
#ifdef DEBUG
        mozce_printf("-- mozce_access called\n");
#endif
    
    return 0;
}

MOZCE_SHUNT_API void mozce_rewind(FILE* inStream)
{
    MOZCE_PRECHECK
        
#ifdef DEBUG
        mozce_printf("mozce_rewind called\n");
#endif
    
    fseek(inStream, 0, SEEK_SET);
}


MOZCE_SHUNT_API FILE* mozce_fdopen(int fd, const char* inMode)
{
    MOZCE_PRECHECK
        
#ifdef DEBUG
        mozce_printf("-- mozce_fdopen called (mode is ignored!) \n");
#endif
    
    
    if(fd < 0 || fd >= MAXFDS || _fdtab[fd].fd == -1)
        return 0;
    
    return _fdtab[fd].file;
}


MOZCE_SHUNT_API void mozce_perror(const char* inString)
{
    MOZCE_PRECHECK
        
#ifdef DEBUG
        mozce_printf("mozce_perror called\n");
#endif
    
    fprintf(stderr, "%s", inString);
}


MOZCE_SHUNT_API int mozce_remove(const char* inPath)
{
    MOZCE_PRECHECK
        
#ifdef DEBUG
        mozce_printf("mozce_remove called on %s\n", inPath);
#endif
    
    int retval = -1;
    
    if(NULL != inPath)
    {
        unsigned short wPath[MAX_PATH];
        
        if(0 != a2w_buffer(inPath, -1, wPath, sizeof(wPath) / sizeof(unsigned short)))
        {
            if(FALSE != DeleteFileW(wPath))
            {
                retval = 0;
                
            }
        }
    }
    
    return retval;
}

MOZCE_SHUNT_API char* mozce_getcwd(char* buff, size_t size)
{
    MOZCE_PRECHECK
        
#ifdef DEBUG
        mozce_printf("mozce_getcwd called.\n");
#endif
    int i;
    unsigned short dir[MAX_PATH];
    GetModuleFileName(GetModuleHandle (NULL), dir, MAX_PATH);
    for (i = _tcslen(dir); i && dir[i] != TEXT('\\'); i--) {}
    dir[i + 1] = TCHAR('\0');
    
    w2a_buffer(dir, -1, buff, size);
    
    return buff;
}

MOZCE_SHUNT_API int mozce_printf(const char * format, ...)
{
#ifdef DEBUG
#define MAX_CHARS_IN_VARIABLE_STRING 1024
    
    char buf[MAX_CHARS_IN_VARIABLE_STRING];
    
    TCHAR tBuf[MAX_CHARS_IN_VARIABLE_STRING];
    
    va_list ptr;
    va_start(ptr,format);
    vsprintf(buf,format,ptr);
    
    mbstowcs(tBuf, buf, MAX_CHARS_IN_VARIABLE_STRING);
    
    OutputDebugString(tBuf);
    
    return 1;
#endif
    return 0;
}

static void mode2binstr(int mode, char* buffer)
{
    if (mode | O_RDWR || (mode | O_WRONLY))  // write only == read|write
    {
        if (mode | O_CREAT)
        {
            strcpy(buffer, "wb+");
        }
        else if (mode | O_APPEND)
        {
            strcpy(buffer, "ab+");
        }
        else if (mode | O_TRUNC)
        {
            strcpy(buffer, "wb+");
        }
        
        else if (mode == O_RDWR)
        {
            strcpy(buffer, "rb+");
        }
    }
    else if (mode | O_RDONLY)
    {
        strcpy(buffer, "rb");
    }
}

MOZCE_SHUNT_API int mozce_open(const char *pathname, int flags, int mode)
{
    MOZCE_PRECHECK
        
#ifdef DEBUG
        mozce_printf("mozce_open called\n");
#endif
    
    _initfds();
    
    
    char modestr[10];
    *modestr = '\0';
    
    mode2binstr(mode, modestr);
    if (*modestr == '\0')
        return -1;
    
    
    FILE* file = fopen(pathname, modestr);
    
    int fd = -1;
    
    if (file)
    {
        fd = _getnewfd();
        
        _fdtab[fd].fd = fd;
        _fdtab[fd].file = file;
        
        fflush(file);
        fread(NULL, 0, 0, file);
    }
    
    return fd;
}


MOZCE_SHUNT_API int mozce_close(int fd)
{
    MOZCE_PRECHECK
        
#ifdef DEBUG
        mozce_printf("mozce_close called\n");
#endif
    
    
    
    
    if(fd < 0 || fd >= MAXFDS || _fdtab[fd].fd == -1)
        return -1;
    
    
    fclose(_fdtab[fd].file);
    _fdtab[fd].fd = -1;
    
    return 0;
}

MOZCE_SHUNT_API size_t mozce_read(int fd, void* buffer, size_t count)
{
    MOZCE_PRECHECK
        
#ifdef DEBUG
        mozce_printf("mozce_read called\n");
#endif
    
    if(fd < 0 || fd >= MAXFDS || _fdtab[fd].fd == -1)
        return -1;
    
    size_t num = fread(buffer, 1, count, _fdtab[fd].file);
    
    if (ferror(_fdtab[fd].file))
        return -1;
    
    return num;
}


MOZCE_SHUNT_API size_t mozce_write(int fd, const void* buffer, size_t count)
{
    MOZCE_PRECHECK
        
#ifdef DEBUG
        mozce_printf("mozce_write called\n");
#endif
    
    if(fd < 0 || fd >= MAXFDS || _fdtab[fd].fd == -1)
        return -1;
    
    size_t num = fwrite(buffer, 1, count, _fdtab[fd].file);
    if (ferror(_fdtab[fd].file))
        return -1;
    
    return num;
}


MOZCE_SHUNT_API int mozce_unlink(const char *pathname)
{
    MOZCE_PRECHECK
        
#ifdef DEBUG
        mozce_printf("mozce_unlink called\n");
#endif
    return mozce_remove(pathname);
}


MOZCE_SHUNT_API int mozce_lseek(int fd, int offset, int whence)
{
    MOZCE_PRECHECK
        
#ifdef DEBUG
        mozce_printf("mozce_lseek called\n");
#endif
    
    
    if(fd < 0 || fd >= MAXFDS || _fdtab[fd].fd == -1)
        return -1;
    
    int newpos = -1;
    int error = fseek(_fdtab[fd].file, offset, whence);
    
    if (!error)
        newpos = ftell(_fdtab[fd].file);
    return newpos;
}



MOZCE_SHUNT_API int mozce_fileno(FILE* f)
{
    MOZCE_PRECHECK
        
#ifdef DEBUG
        mozce_printf("mozce_fileno called\n");
#endif
    
    // Windows SDK is broken.  _fileno should return an int, but for whatever god forsaken reason, CE returns void*.
    int fd;
    
    for(fd = 0; fd < MAXFDS; fd++)
    {
        if(_fdtab[fd].file == f)
        {
            return _fdtab[fd].fd;
        }
    }
    return (int) fileno(f);
    
}


#if 0
{
#endif
} /* extern "C" */