//
// Copyright (c) Microsoft Corporation.  All rights reserved.
//
//
// Use of this source code is subject to the terms of the Microsoft end-user
// license agreement (EULA) under which you licensed this SOFTWARE PRODUCT.
// If you did not accept the terms of the EULA, you are not authorized to use
// this source code. For a copy of the EULA, please see the LICENSE.RTF on your
// install media.
//
/*++
THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
PARTICULAR PURPOSE.

Module Name:  
    format.c
Abstract:  
    This file contains simple formatted output string support for the
    boot loader.
Functions:


Notes: 
    supported, with no frills: x d s u X, H, and B
    backslash n is converted to backslash n backslash r.

    X is equivalent to 08x; B, 02x; and H, 04x in printf format.

--*/
#include <windows.h>
#include <stdarg.h>
#include <nkintr.h>

//
// Functional Prototypes
//
static void pOutputByte(unsigned char c);
static void pOutputNumHex(unsigned long n,long depth);
static void pOutputNumDecimal(unsigned long n);
static void OutputString(const unsigned char *s);

char *szSprintf;

//
// Routine starts
//
/*****************************************************************************
*
*
*   @func   void    |   OutputFormatString | Simple formatted output string routine
*
*   @rdesc  none
*
*   @parm   const unsigned char * |   sz,... |
*               Format String:
*
*               @flag Format string | type
*               @flag u | unsigned
*               @flag d | int
*               @flag c | char
*               @flag s | string
*               @flag x | 4-bit hex number
*               @flag B | 8-bit hex number
*               @flag H | 16-bit hex number
*               @flag X | 32-bit hex number
*
*   @comm
*           Same as FormatString, but output to serial port instead of buffer.
*/
/*
void
OutputDebugStringW(
    const unsigned char *sz, ...
)
{
}
*/
void
EdbgOutputDebugString(
    const unsigned char *sz, ...
)
{
    unsigned char    c;
    va_list         vl;
    
    va_start(vl, sz);
    
    while (*sz) {
        c = *sz++;
        switch (c) { 
            case (unsigned char)'%':
            c = *sz++;
            switch (c) { 
                case 'x':
                pOutputNumHex(va_arg(vl, unsigned long), 0);
                break;
                case 'B':
                pOutputNumHex(va_arg(vl, unsigned long), 2);
                break;
                case 'H':
                pOutputNumHex(va_arg(vl, unsigned long), 4);
                break;
                case 'X':
                pOutputNumHex(va_arg(vl, unsigned long), 8);
                break;
                case 'd': {
                long    l;
                
                l = va_arg(vl, long);
                if (l < 0) { 
                    pOutputByte('-');
                    l = - l;
                }
                pOutputNumDecimal((unsigned long)l);
            }
                break;
                case 'u':
                pOutputNumDecimal(va_arg(vl, unsigned long));
                break;
                case 's':
                OutputString(va_arg(vl, char *));
                break;
                case '%':
                pOutputByte('%');
                break;
                case 'c':
                c = va_arg(vl, unsigned char);
                pOutputByte(c);
                break;
                
                default:
                pOutputByte(' ');
                break;
            }
            break;
            case '\n':
            pOutputByte('\r');
            // fall through
            default:
            pOutputByte(c);
        }
    }
    
    va_end(vl);
}

/*****************************************************************************
*
*
*   @func   void    |   FormatString | Simple formatted output string routine
*
*   @rdesc  Returns length of formatted string
*
*   @parm   unsigned char * |   pBuf |
*               Pointer to string to return formatted output.  User must ensure
*               that buffer is large enough.
*
*   @parm   const unsigned char * |   sz,... |
*               Format String:
*
*               @flag Format string | type
*               @flag u | unsigned
*               @flag d | int
*               @flag c | char
*               @flag s | string
*               @flag x | 4-bit hex number
*               @flag B | 8-bit hex number
*               @flag H | 16-bit hex number
*               @flag X | 32-bit hex number
*
*   @comm
*           Same as OutputFormatString, but output to buffer instead of serial port.
*/
unsigned int
FormatString(
    unsigned char *pBuf, const unsigned char *sz, ...
)
{
    unsigned char    c;
    va_list         vl;
    
    va_start(vl, sz);
    
    szSprintf = pBuf;
    while (*sz) {
        c = *sz++;
        switch (c) { 
            case (unsigned char)'%':
            c = *sz++;
            switch (c) { 
                case 'x':
                pOutputNumHex(va_arg(vl, unsigned long), 0);
                break;
                case 'B':
                pOutputNumHex(va_arg(vl, unsigned long), 2);
                break;
                case 'H':
                pOutputNumHex(va_arg(vl, unsigned long), 4);
                break;
                case 'X':
                pOutputNumHex(va_arg(vl, unsigned long), 8);
                break;
                case 'd': {
                long    l;
                
                l = va_arg(vl, long);
                if (l < 0) { 
                    pOutputByte('-');
                    l = - l;
                }
                pOutputNumDecimal((unsigned long)l);
            }
                break;
                case 'u':
                pOutputNumDecimal(va_arg(vl, unsigned long));
                break;
                case 's':
                OutputString(va_arg(vl, char *));
                break;
                case '%':
                pOutputByte('%');
                break;
                case 'c':
                c = va_arg(vl, unsigned char);
                pOutputByte(c);
                break;
                
                default:
                pOutputByte(' ');
                break;
            }
            break;
            case '\n':
            pOutputByte('\r');
            // fall through
            default:
            pOutputByte(c);
        }
    }
    pOutputByte(0);
    c = szSprintf - pBuf;
    szSprintf = 0;
    va_end(vl);
    return (c);
}

/*****************************************************************************
*
*
*   @func   void    |   pOutputByte | Sends a byte out of the monitor port.
*
*   @rdesc  none
*
*   @parm   unsigned int |   c |
*               Byte to send.
*
*/
static void
pOutputByte(
    unsigned char c
)
{
    if (szSprintf)
        *szSprintf++ = c;
    else
        OEMWriteDebugByte(c);
}


/*****************************************************************************
*
*
*   @func   void    |   pOutputNumHex | Print the hex representation of a number through the monitor port.
*
*   @rdesc  none
*
*   @parm   unsigned long |   n |
*               The number to print.
*
*   @parm   long | depth |
*               Minimum number of digits to print.
*
*/
static void
pOutputNumHex(
    unsigned long   n, 
    long            depth
)
{
    if (depth) {
        depth--;
    }
    
    if ((n & ~0xf) || depth) {
        pOutputNumHex(n >> 4, depth);
        n &= 0xf;
    }
    
    if (n < 10) {
        pOutputByte((unsigned char)(n + '0'));
    } else { 
    pOutputByte((unsigned char)(n - 10 + 'A'));
}
}


/*****************************************************************************
*
*
*   @func   void    |   pOutputNumDecimal | Print the decimal representation of a number through the monitor port.
*
*   @rdesc  none
*
*   @parm   unsigned long |   n |
*               The number to print.
*
*/
static void
pOutputNumDecimal(
    unsigned long n
)
{
    if (n >= 10) {
        pOutputNumDecimal(n / 10);
        n %= 10;
    }
    pOutputByte((unsigned char)(n + '0'));
}

/*****************************************************************************
*
*
*   @func   void    |   OutputString | Sends an unformatted string to the monitor port.
*
*   @rdesc  none
*
*   @parm   const unsigned char * |   s |
*               points to the string to be printed.
*
*   @comm
*           backslash n is converted to backslash r backslash n
*/
static void
OutputString(
    const unsigned char *s
)
{
    while (*s) {		
        if (*s == '\n') {
            OEMWriteDebugByte('\r');
        }
        OEMWriteDebugByte(*s++);
    }
}


// This routine will take a binary IP address as represent here and return a dotted decimal version of it
char *inet_ntoa( DWORD dwIP ) {

    static char szDottedD[16];

    FormatString( szDottedD, "%u.%u.%u.%u",
        (BYTE)dwIP, (BYTE)(dwIP >> 8), (BYTE)(dwIP >> 16), (BYTE)(dwIP >> 24) );

    return szDottedD;

} // inet_ntoa()

// This routine will take a dotted decimal IP address as represent here and return a binary version of it
DWORD inet_addr( char *pszDottedD ) {

    DWORD dwIP = 0;
    DWORD cBytes;
    char *pszLastNum;
    int atoi (const char *s);
    
    // Replace the dots with NULL terminators
    pszLastNum = pszDottedD;
    for( cBytes = 0; cBytes < 4; cBytes++ ) {
        while(*pszDottedD != '.' && *pszDottedD != '\0')
            pszDottedD++;
        if (pszDottedD == '\0' && cBytes != 3)
            return 0;
        *pszDottedD = '\0';
        dwIP |= (atoi(pszLastNum) & 0xFF) << (8*cBytes);
        pszLastNum = ++pszDottedD;
    }

    return dwIP;

} // inet_ntoa()