/*========================================================================
//
//      diag.c
//
//      Infrastructure diagnostic output code
//
//========================================================================
//####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
//
// eCos is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 2 or (at your option) any later version.
//
// eCos 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
// for more details.
//
// You should have received a copy of the GNU General Public License along
// with eCos; if not, write to the Free Software Foundation, Inc.,
// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
//
// As a special exception, if other files instantiate templates or use macros
// or inline functions from this file, or you compile this file and link it
// with other works to produce a work based on this file, this file does not
// by itself cause the resulting work to be covered by the GNU General Public
// License. However the source code for this file must still be made available
// in accordance with section (3) of the GNU General Public License.
//
// This exception does not invalidate any other reasons why a work based on
// this file might be covered by the GNU General Public License.
//
// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
// at http://sources.redhat.com/ecos/ecos-license/
// -------------------------------------------
//####ECOSGPLCOPYRIGHTEND####
//========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):    nickg,gthomas,jlarmour
// Contributors: 
// Date:         1999-02-22
// Purpose:      Infrastructure diagnostic output
// Description:  Implementations of infrastructure diagnostic routines.
//
//####DESCRIPTIONEND####
//
//======================================================================*/

#include <pkgconf/system.h>
#include <pkgconf/hal.h>
#include <pkgconf/infra.h>

#include <cyg/infra/cyg_type.h>         // base types
  
#include <cyg/infra/diag.h>             // HAL polled output
#include <cyg/hal/hal_arch.h>           // architectural stuff for...
#include <cyg/hal/hal_intr.h>           // interrupt control
#include <cyg/hal/hal_diag.h>           // diagnostic output routines
#include <stdarg.h>
#include <limits.h>
  
#ifdef CYG_HAL_DIAG_LOCK_DATA_DEFN
CYG_HAL_DIAG_LOCK_DATA_DEFN;
#endif
  
/*----------------------------------------------------------------------*/

externC void diag_write_num(
    cyg_uint32  n,              /* number to write              */
    cyg_ucount8 base,           /* radix to write to            */
    cyg_ucount8 sign,           /* sign, '-' if -ve, '+' if +ve */
    cyg_bool    pfzero,         /* prefix with zero ?           */
    cyg_ucount8 width           /* min width of number          */
    );

class Cyg_dummy_diag_init_class {
public:
    Cyg_dummy_diag_init_class() {
        HAL_DIAG_INIT();
    }
};

// Initialize after HAL.
static Cyg_dummy_diag_init_class cyg_dummy_diag_init_obj 
                                      CYGBLD_ATTRIB_INIT_AFTER(CYG_INIT_HAL);

/*----------------------------------------------------------------------*/
/* Write single char to output                                          */

externC void diag_write_char(char c)
{    
    /* Translate LF into CRLF */
    
    if( c == '\n' )
    {
        HAL_DIAG_WRITE_CHAR('\r');        
    }

    HAL_DIAG_WRITE_CHAR(c);
}

// Default wrapper function used by diag_printf
static void
_diag_write_char(char c, void **param)
{
    diag_write_char(c);
}

/*----------------------------------------------------------------------*/
/* Initialize. Call to pull in diag initializing constructor            */

externC void diag_init(void)
{
}

//
// This routine is used to send characters during 'printf()' functions.
// It can be replaced by providing a replacement via diag_init_putc().
//
static void (*_putc)(char c, void **param) = _diag_write_char;

void
diag_init_putc(void (*putc)(char c, void **param))
{
    _putc = putc;
}

/*----------------------------------------------------------------------*/
/* Write zero terminated string                                         */
  
externC void diag_write_string(const char *psz)
{
    while( *psz ) diag_write_char( *psz++ );
}

/*----------------------------------------------------------------------*/
/* Write decimal value                                                  */

externC void diag_write_dec( cyg_int32 n)
{
    cyg_ucount8 sign;

    if( n < 0 ) n = -n, sign = '-';
    else sign = '+';
    
    diag_write_num( n, 10, sign, false, 0);
}

/*----------------------------------------------------------------------*/
/* Write hexadecimal value                                              */

externC void diag_write_hex( cyg_uint32 n)
{
    diag_write_num( n, 16, '+', false, 0);
}    

/*----------------------------------------------------------------------*/
/* Generic number writing function                                      */
/* The parameters determine what radix is used, the signed-ness of the  */
/* number, its minimum width and whether it is zero or space filled on  */
/* the left.                                                            */

externC void diag_write_long_num(
    cyg_uint64  n,              /* number to write              */
    cyg_ucount8 base,           /* radix to write to            */
    cyg_ucount8 sign,           /* sign, '-' if -ve, '+' if +ve */
    cyg_bool    pfzero,         /* prefix with zero ?           */
    cyg_ucount8 width           /* min width of number          */
    )
{
    char buf[32];
    cyg_count8 bpos;
    char bufinit = pfzero?'0':' ';
    char *digits = "0123456789ABCDEF";

    /* init buffer to padding char: space or zero */
    for( bpos = 0; bpos < (cyg_count8)sizeof(buf); bpos++ ) buf[bpos] = bufinit;

    /* Set pos to start */
    bpos = 0;

    /* construct digits into buffer in reverse order */
    if( n == 0 ) buf[bpos++] = '0';
    else while( n != 0 )
    {
        cyg_ucount8 d = n % base;
        buf[bpos++] = digits[d];
        n /= base;
    }

    /* set pos to width if less. */
    if( (cyg_count8)width > bpos ) bpos = width;

    /* set sign if negative. */
    if( sign == '-' )
    {
        if( buf[bpos-1] == bufinit ) bpos--;
        buf[bpos] = sign;
    }
    else bpos--;

    /* Now write it out in correct order. */
    while( bpos >= 0 )
        diag_write_char(buf[bpos--]);
}

externC void diag_write_num(
    cyg_uint32  n,              /* number to write              */
    cyg_ucount8 base,           /* radix to write to            */
    cyg_ucount8 sign,           /* sign, '-' if -ve, '+' if +ve */
    cyg_bool    pfzero,         /* prefix with zero ?           */
    cyg_ucount8 width           /* min width of number          */
    )
{
    diag_write_long_num((long long)n, base, sign, pfzero, width);
}

/*----------------------------------------------------------------------*/
/* perform some simple sanity checks on a string to ensure that it      */
/* consists of printable characters and is of reasonable length.        */

static cyg_bool diag_check_string( const char *str )
{
    cyg_bool result = true;
    const char *s;

    if( str == NULL ) return false;
    
    for( s = str ; result && *s ; s++ )
    {
        char c = *s;

        /* Check for a reasonable length string. */
        
        if( s-str > 2048 ) result = false;

        /* We only really support CR, NL, and backspace at present. If
         * we want to use tabs or other special chars, this test will
         * have to be expanded.  */

        if( c == '\n' || c == '\r' || c == '\b' )
            continue;

        /* Check for printable chars. This assumes ASCII */
        
        if( c < ' ' || c > '~' )
            result = false;

    }

    return result;
}

/*----------------------------------------------------------------------*/

static int
_cvt(unsigned long long val, char *buf, long radix, char *digits)
{
    char temp[80];
    char *cp = temp;
    int length = 0;

    if (val == 0) {
        /* Special case */
        *cp++ = '0';
    } else {
        while (val) {
            *cp++ = digits[val % radix];
            val /= radix;
        }
    }
    while (cp != temp) {
        *buf++ = *--cp;
        length++;
    }
    *buf = '\0';
    return (length);
}

#define is_digit(c) ((c >= '0') && (c <= '9'))

static int
_vprintf(void (*putc)(char c, void **param), void **param, const char *fmt, va_list ap)
{
    char buf[sizeof(long long)*8];
    char c, sign, *cp=buf;
    int left_prec, right_prec, zero_fill, pad, pad_on_right, 
        i, islong, islonglong;
    long long val = 0;
    int res = 0, length = 0;

    if (!diag_check_string(fmt)) {
        diag_write_string("<Bad format string: ");
        diag_write_hex((cyg_uint32)fmt);
        diag_write_string(" :");
        for( i = 0; i < 8; i++ ) {
            diag_write_char(' ');
            val = va_arg(ap, unsigned long);
            diag_write_hex(val);
        }
        diag_write_string(">\n");
        return 0;
    }
    while ((c = *fmt++) != '\0') {
        if (c == '%') {
            c = *fmt++;
            left_prec = right_prec = pad_on_right = islong = islonglong = 0;
            if (c == '-') {
                c = *fmt++;
                pad_on_right++;
            }
            if (c == '0') {
                zero_fill = true;
                c = *fmt++;
            } else {
                zero_fill = false;
            }
            while (is_digit(c)) {
                left_prec = (left_prec * 10) + (c - '0');
                c = *fmt++;
            }
            if (c == '.') {
                c = *fmt++;
                zero_fill++;
                while (is_digit(c)) {
                    right_prec = (right_prec * 10) + (c - '0');
                    c = *fmt++;
                }
            } else {
                right_prec = left_prec;
            }
            sign = '\0';
            if (c == 'l') {
                // 'long' qualifier
                c = *fmt++;
		islong = 1;
                if (c == 'l') {
                    // long long qualifier
                    c = *fmt++;
                    islonglong = 1;
                }
            }
            // Fetch value [numeric descriptors only]
            switch (c) {
            case 'p':
		islong = 1;
            case 'd':
            case 'D':
            case 'x':
            case 'X':
            case 'u':
            case 'U':
            case 'b':
            case 'B':
                if (islonglong) {
                    val = va_arg(ap, long long);
	        } else if (islong) {
                    val = (long long)va_arg(ap, long);
		} else{
                    val = (long long)va_arg(ap, int);
                }
                if ((c == 'd') || (c == 'D')) {
                    if (val < 0) {
                        sign = '-';
                        val = -val;
                    }
                } else {
                    // Mask to unsigned, sized quantity
                    if (islong) {
                        val &= ((long long)1 << (sizeof(long) * 8)) - 1;
                    } else{
                        val &= ((long long)1 << (sizeof(int) * 8)) - 1;
                    }
                }
                break;
            default:
                break;
            }
            // Process output
            switch (c) {
            case 'p':  // Pointer
                (*putc)('0', param);
                (*putc)('x', param);
                zero_fill = true;
                left_prec = sizeof(unsigned long)*2;
            case 'd':
            case 'D':
            case 'u':
            case 'U':
            case 'x':
            case 'X':
                switch (c) {
                case 'd':
                case 'D':
                case 'u':
                case 'U':
                    length = _cvt(val, buf, 10, "0123456789");
                    break;
                case 'p':
                case 'x':
                    length = _cvt(val, buf, 16, "0123456789abcdef");
                    break;
                case 'X':
                    length = _cvt(val, buf, 16, "0123456789ABCDEF");
                    break;
                }
                cp = buf;
                break;
            case 's':
            case 'S':
                cp = va_arg(ap, char *);
                if (cp == NULL) 
                    cp = "<null>";
                else if (!diag_check_string(cp)) {
                    diag_write_string("<Not a string: 0x");
                    diag_write_hex((cyg_uint32)cp);
                    cp = ">";
                }
                length = 0;
                while (cp[length] != '\0') length++;
                break;
            case 'c':
            case 'C':
                c = va_arg(ap, int /*char*/);
                (*putc)(c, param);
                res++;
                continue;
            case 'b':
            case 'B':
                length = left_prec;
                if (left_prec == 0) {
                    if (islonglong)
                        length = sizeof(long long)*8;
                    else if (islong)
                        length = sizeof(long)*8;
                    else
                        length = sizeof(int)*8;
                }
                for (i = 0;  i < length-1;  i++) {
                    buf[i] = ((val & ((long long)1<<i)) ? '1' : '.');
                }
                cp = buf;
                break;
            case '%':
                (*putc)('%', param);
                break;
            default:
                (*putc)('%', param);
                (*putc)(c, param);
                res += 2;
            }
            pad = left_prec - length;
            if (sign != '\0') {
                pad--;
            }
            if (zero_fill) {
                c = '0';
                if (sign != '\0') {
                    (*putc)(sign, param);
                    res++;
                    sign = '\0';
                }
            } else {
                c = ' ';
            }
            if (!pad_on_right) {
                while (pad-- > 0) {
                    (*putc)(c, param);
                    res++;
                }
            }
            if (sign != '\0') {
                (*putc)(sign, param);
                res++;
            }
            while (length-- > 0) {
                c = *cp++;
                (*putc)(c, param);
                res++;
            }
            if (pad_on_right) {
                while (pad-- > 0) {
                    (*putc)(' ', param);
                    res++;
                }
            }
        } else {
            (*putc)(c, param);
            res++;
        }
    }
    return (res);
}

struct _sputc_info {
    char *ptr;
    int max, len;
};

static void 
_sputc(char c, void **param)
{
    struct _sputc_info *info = (struct _sputc_info *)param;

    if (info->len < info->max) {
        *(info->ptr)++ = c;
        *(info->ptr) = '\0';
        info->len++;
    }
}

int
diag_sprintf(char *buf, const char *fmt, ...)
{        
    int ret;
    va_list ap;
    struct _sputc_info info;

    va_start(ap, fmt);
    info.ptr = buf;
    info.max = 1024;  // Unlimited
    info.len = 0;
    ret = _vprintf(_sputc, (void **)&info, fmt, ap);
    va_end(ap);
    return (info.len);
}

int
diag_snprintf(char *buf, size_t len, const char *fmt, ...)
{        
    int ret;
    va_list ap;
    struct _sputc_info info;

    va_start(ap, fmt);
    info.ptr = buf;
    info.len = 0;
    info.max = len;
    ret = _vprintf(_sputc, (void **)&info, fmt, ap);
    va_end(ap);
    return (info.len);
}

int 
diag_vsprintf(char *buf, const char *fmt, va_list ap)
{
    int ret;
    struct _sputc_info info;

    info.ptr = buf;
    info.max = 1024;  // Unlimited
    info.len = 0;
    ret = _vprintf(_sputc, (void **)&info, fmt, ap);
    return (info.len);
}

int
diag_printf(const char *fmt, ...)
{
    va_list ap;
    int ret;

    va_start(ap, fmt);
    ret = _vprintf(_putc, (void **)0, fmt, ap);
    va_end(ap);
    return (ret);
}

int
diag_vprintf(const char *fmt, va_list ap)
{
    int ret;

    ret = _vprintf(_putc, (void **)0, fmt, ap);
    return (ret);
}

void
diag_dump_buf_with_offset(cyg_uint8     *p, 
                          CYG_ADDRWORD   s, 
                          cyg_uint8     *base)
{
    int i, c;
    if ((CYG_ADDRWORD)s > (CYG_ADDRWORD)p) {
        s = (CYG_ADDRWORD)s - (CYG_ADDRWORD)p;
    }
    while ((int)s > 0) {
        if (base) {
            diag_printf("%08X: ", (CYG_ADDRWORD)p - (CYG_ADDRWORD)base);
        } else {
            diag_printf("%08X: ", p);
        }
        for (i = 0;  i < 16;  i++) {
            if (i < (int)s) {
                diag_printf("%02X ", p[i] & 0xFF);
            } else {
                diag_printf("   ");
            }
	    if (i == 7) diag_printf(" ");
        }
        diag_printf(" |");
        for (i = 0;  i < 16;  i++) {
            if (i < (int)s) {
                c = p[i] & 0xFF;
                if ((c < 0x20) || (c >= 0x7F)) c = '.';
            } else {
                c = ' ';
            }
            diag_printf("%c", c);
        }
        diag_printf("|\n");
        s -= 16;
        p += 16;
    }
}

externC void
diag_dump_buf(void *p, CYG_ADDRWORD s)
{
   diag_dump_buf_with_offset((cyg_uint8 *)p, s, 0);
}

void
diag_dump_buf_with_offset_32bit(cyg_uint32   *p, 
				CYG_ADDRWORD  s, 
				cyg_uint32   *base)
{
    int i;
    if ((CYG_ADDRWORD)s > (CYG_ADDRWORD)p) {
        s = (CYG_ADDRWORD)s - (CYG_ADDRWORD)p;
    }
    while ((int)s > 0) {
        if (base) {
            diag_printf("%08X: ", (CYG_ADDRWORD)p - (CYG_ADDRWORD)base);
        } else {
            diag_printf("%08X: ", p);
        }
        for (i = 0;  i < 4;  i++) {
            if (i < (int)s/4) {
                diag_printf("%08X ", p[i] );
            } else {
                diag_printf("         ");
            }
        }
        diag_printf("\n");
        s -= 16;
        p += 4;
    }
}

externC void
diag_dump_buf_32bit(void *p, CYG_ADDRWORD s)
{
   diag_dump_buf_with_offset_32bit((cyg_uint32 *)p, s, 0);
}

void
diag_dump_buf_with_offset_16bit(cyg_uint16   *p, 
				CYG_ADDRWORD  s, 
				cyg_uint16   *base)
{
    int i;
    if ((CYG_ADDRWORD)s > (CYG_ADDRWORD)p) {
        s = (CYG_ADDRWORD)s - (CYG_ADDRWORD)p;
    }
    while ((int)s > 0) {
        if (base) {
            diag_printf("%08X: ", (CYG_ADDRWORD)p - (CYG_ADDRWORD)base);
        } else {
            diag_printf("%08X: ", p);
        }
        for (i = 0;  i < 8;  i++) {
            if (i < (int)s/2) {
	      diag_printf("%04X ", p[i] );
	      if (i == 3) diag_printf(" ");
            } else {
	      diag_printf("     ");
            }
        }
        diag_printf("\n");
        s -= 16;
        p += 8;
    }
}

externC void
diag_dump_buf_16bit(void *p, CYG_ADDRWORD s)
{
   diag_dump_buf_with_offset_16bit((cyg_uint16 *)p, s, 0);
}

/*-----------------------------------------------------------------------*/
/* EOF infra/diag.c */
