debug.c File Reference

#include <stdio.h>
#include <stdint.h>
#include <stdarg.h>
#include <ctype.h>
#include <ipxe/console.h>

Go to the source code of this file.

Data Structures
struct	autocolour
	A colour assigned to an autocolourised debug message stream. More...

Macros
#define	DBGCOL_MIN   31
	Base message stream colour. More...
#define	DBGCOL_MAX   ( DBGCOL_MIN + 6 - 1 )
	Maximum number of separately coloured message streams. More...

Functions
	FILE_LICENCE (GPL2_OR_LATER_OR_UBDL)
void	dbg_printf (const char *fmt,...)
	Print debug message. More...
void	dbg_pause (void)
	Pause until a key is pressed. More...
void	dbg_more (void)
	Indicate more data to follow and pause until a key is pressed. More...
static void	dbg_hex_dump_da_row (unsigned long dispaddr, const void *data, unsigned long len, unsigned int offset)
	Print row of a hex dump with specified display address. More...
void	dbg_hex_dump_da (unsigned long dispaddr, const void *data, unsigned long len)
	Print hex dump with specified display address. More...
static int	dbg_autocolour (unsigned long stream)
	Choose colour index for debug autocolourisation. More...
void	dbg_autocolourise (unsigned long stream)
	Select automatic colour for debug messages. More...
void	dbg_decolourise (void)
	Revert to normal colour. More...

Macro Definition Documentation

DBGCOL_MIN

#define DBGCOL_MIN   31

Base message stream colour.

We default to using 31 (red foreground) as the base colour.

Definition at line 131 of file debug.c.

DBGCOL_MAX

#define DBGCOL_MAX   ( DBGCOL_MIN + 6 - 1 )

Maximum number of separately coloured message streams.

Six is the realistic maximum; there are 8 basic ANSI colours, one of which will be the terminal default and one of which will be invisible on the terminal because it matches the background colour.

Definition at line 142 of file debug.c.

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_OR_LATER_OR_UBDL

)

dbg_hex_dump_da_row()

static void dbg_hex_dump_da_row ( unsigned long  dispaddr, const void *  data, unsigned long  len, unsigned int  offset  )

static

Print row of a hex dump with specified display address.

Parameters

dispaddr	Display address
data	Data to print
len	Length of data
offset	Starting offset within data

Definition at line 82 of file debug.c.

                                                                           {
        const uint8_t *bytes = data;
        unsigned int i;
        uint8_t byte;

        dbg_printf ( "%08lx :", ( dispaddr + offset ) );
        for ( i = offset ; i < ( offset + 16 ) ; i++ ) {
                if ( i >= len ) {
                        dbg_printf ( "   " );
                        continue;
                }
                dbg_printf ( "%c%02x",
                             ( ( ( i % 16 ) == 8 ) ? '-' : ' ' ), bytes[i] );
        }
        dbg_printf ( " : " );
        for ( i = offset ; i < ( offset + 16 ) ; i++ ) {
                if ( i >= len ) {
                        dbg_printf ( " " );
                        continue;
                }
                byte = bytes[i];
                dbg_printf ( "%c", ( isprint ( byte ) ? byte : '.' ) );
        }
        dbg_printf ( "\n" );
}

References bytes, data, dbg_printf(), isprint(), len, and offset.

Referenced by dbg_hex_dump_da().

dbg_autocolour()

static int dbg_autocolour ( unsigned long  stream )

static

Choose colour index for debug autocolourisation.

Parameters

stream

Message stream ID

Return values

colour

Colour ID

Definition at line 159 of file debug.c.

                                                   {
        static struct autocolour acs[ DBGCOL_MAX - DBGCOL_MIN + 1 ];
        static unsigned long use;
        unsigned int i;
        unsigned int oldest;
        unsigned int oldest_last_used;

        /* Increment usage iteration counter */
        use++;

        /* Scan through list for a currently assigned colour */
        for ( i = 0 ; i < ( sizeof ( acs ) / sizeof ( acs[0] ) ) ; i++ ) {
                if ( acs[i].stream == stream ) {
                        acs[i].last_used = use;
                        return i;
                }
        }

        /* No colour found; evict the oldest from the list */
        oldest = 0;
        oldest_last_used = use;
        for ( i = 0 ; i < ( sizeof ( acs ) / sizeof ( acs[0] ) ) ; i++ ) {
                if ( acs[i].last_used < oldest_last_used ) {
                        oldest_last_used = acs[i].last_used;
                        oldest = i;
                }
        }
        acs[oldest].stream = stream;
        acs[oldest].last_used = use;
        return oldest;
}

References DBGCOL_MAX, DBGCOL_MIN, autocolour::last_used, and autocolour::stream.

Referenced by dbg_autocolourise().