diag.cxx

eCos操作系统源码

/*========================================================================
//
//      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.
// Copyright (C) 2002 Gary Thomas
//
// 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, tab and backspace at present.
	 * If we want to use other special chars, this test will
         * have to be expanded.  */

        if( c == '\n' || c == '\r' || c == '\b' || c == '\t' )
            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;
                }
            }
            if (c == 'z') {
                c = *fmt++;
		islong = sizeof(size_t) == sizeof(long);
            }
            // Fetch value [numeric descriptors only]
            switch (c) {
            case 'p':
		islong = 1;
            case 'd':