nes-proj/lib/printf.c

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/*
* Copyright (c) 2010, Mariano Alvira <mar@devl.org> and other contributors
* to the MC1322x project (http://mc1322x.devl.org)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of libmc1322x: see http://mc1322x.devl.org
* for details.
*
* $Id$
*/
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/**
* \file printf-stdarg.c
*
* \brief sprintf functions to replace newlib for AVR32 UC3.
*
* \author $Author: umanzoli $
*
* Created on : 17-mar-2009
*
* $Id$
*/
/*
* Copyright 2001, 2002 Georges Menie (www.menie.org)
* stdarg version contributed by Christian Ettinger
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdarg.h>
#include <stdbool.h>
#include <string.h>
#include <mc1322x.h>
#include <types.h>
#define __putc(x) uart1_putc(x)
/**
* Structure to hold data to be passed to print function with format.
* Aka print context.
*/
struct __print_ctx_t
{
//! pointer to next char to be filled.
char* _ptr;
//! maximum length of the buffer.
size_t _max_len;
};
typedef struct __print_ctx_t _print_ctx_t;
/**
* Pad string to right
*/
#define _PRINTFMT_PAD_RIGHT 1
/**
* Pad the number with zeroes
*/
#define _PRINTFMT_PAD_ZERO 2
/**
* The following should be enough for 32 bit int
*/
#define _PRINTFMT_INT_BUF_LEN 12
/**
* Print a character to stdout (if string is null)
* otherwise, put the character at the end of the provided string.
*/
static void __print_char( _print_ctx_t* ctx, char c )
{
if( ctx ) {
if( c == '\r' || c == '\n' ) {
if( ctx->_max_len > 1 ) {
*(ctx->_ptr)='\r';
ctx->_max_len--;
ctx->_ptr++;
*(ctx->_ptr)='\n';
ctx->_max_len--;
ctx->_ptr++;
} else {
*(ctx->_ptr)='\n';
ctx->_max_len--;
ctx->_ptr++;
}
} else {
if( ctx->_max_len ) {
*(ctx->_ptr)=c;
ctx->_max_len--;
ctx->_ptr++;
}
}
} else {
__putc( (uint8_t)c );
}
}
/**
* Print a string to a given string.
*/
static int __print_str( _print_ctx_t* ctx,
const char *string,
int width,
int pad,
int print_limit,
bool is_number )
{
int pc = 0;
int padchar = ' ';
int i, len;
if( width > 0 ) {
register int len = 0;
register const char *ptr;
for( ptr = string; *ptr; ++ptr )
++len;
if( len >= width )
width = 0;
else
width -= len;
if( pad & _PRINTFMT_PAD_ZERO )
padchar = '0';
}
if( !( pad & _PRINTFMT_PAD_RIGHT ) ) {
for( ; width > 0; --width ) {
__print_char( ctx, padchar );
++pc;
}
}
// The string to print is not the result of a number conversion to ascii.
if( false == is_number ) {
// For a string, printlimit is the max number of characters to display.
for( ; print_limit && *string; ++string, --print_limit ) {
__print_char( ctx, *string );
++pc;
}
}
// The string to print represents an integer number.
if( true == is_number ) {
// In this case, printlimit is the min number of digits to print.
// If the length of the number to print is less than the min nb of i
// digits to display, we add 0 before printing the number.
len = strlen( string );
if( len < print_limit ) {
i = print_limit - len;
for( ; i; i-- ) {
__print_char( ctx, '0' );
++pc;
}
}
}
/*
* Else: The string to print is not the result of a number conversion to ascii.
* For a string, printlimit is the max number of characters to display.
*/
for( ; print_limit && *string; ++string, --print_limit ) {
__print_char( ctx, *string );
++pc;
}
for( ; width > 0; --width ) {
__print_char( ctx, padchar );
++pc;
}
return pc;
}
/**
* Print a number to the given string, with the given base.
*/
static int __print_int( _print_ctx_t* ctx,
int i,
int b,
int sg,
int width,
int pad,
int letbase,
int print_limit )
{
char print_buf[_PRINTFMT_INT_BUF_LEN];
register char *s;
register int t, neg = 0, pc = 0;
register unsigned int u = i;
if( i == 0 ) {
print_buf[0] = '0';
print_buf[1] = '\0';
return __print_str( ctx, print_buf, width, pad, print_limit, true );
}
if( sg && b == 10 && i < 0 ) {
neg = 1;
u = -i;
}
s = print_buf + _PRINTFMT_INT_BUF_LEN - 1;
*s = '\0';
while( u ) {
t = u % b;
if( t >= 10 )
t += letbase - '0' - 10;
*--s = t + '0';
u /= b;
}
if( neg ) {
if( width && ( pad & _PRINTFMT_PAD_ZERO ) ) {
__print_char( ctx, '-' );
++pc;
--width;
} else {
*--s = '-';
}
}
return pc + __print_str( ctx, s, width, pad, print_limit, true );
}
/*
#if __GNUC__
int fprintf( __FILE *stream, const char *format, ... )
{
return 0;
}
#endif
*/
/**
* Print the given arguments, with given format onto string out.
*/
static int __print_fmt( _print_ctx_t* ctx, const char *format, va_list args )
{
int width;
int pad;
int print_limit;
int pc = 0;
char scr[2];
for( ; *format != 0; ++format ) {
if( *format == '%' ) {
++format;
width = pad = print_limit = 0;
if( *format == '\0' ) {
break;
}
if( *format == '%' ) {
goto out;
}
if( *format == '-' ) {
++format;
pad = _PRINTFMT_PAD_RIGHT;
}
while( *format == '0' ) {
++format;
pad |= _PRINTFMT_PAD_ZERO;
}
for( ; *format >= '0' && *format <= '9'; ++format ) {
width *= 10;
width += *format - '0';
}
if( *format == '.' ) {
++format;
for( ; *format >= '0' && *format <= '9'; ++format ) {
print_limit *= 10;
print_limit += *format - '0';
}
}
if( 0 == print_limit ) {
print_limit--;
}
if( *format == 'l' ) {
++format;
}
if( *format == 's' ) {
register char *s = (char *) va_arg( args, int );
pc += __print_str( ctx,
s ? s : "(null)",
width,
pad,
print_limit,
false );
continue;
}
if( *format == 'd' ) {
pc += __print_int( ctx, va_arg( args, int ), 10, 1, width, pad, 'a', print_limit );
continue;
}
if( ( *format == 'x' ) || ( *format == 'p' ) ) {
pc += __print_int( ctx, va_arg( args, int ), 16, 0, width, pad, 'a', print_limit );
continue;
}
if( *format == 'X' ) {
pc += __print_int( ctx, va_arg( args, int ), 16, 0, width, pad, 'A', print_limit );
continue;
}
if( *format == 'u' ) {
pc += __print_int( ctx, va_arg( args, int ), 10, 0, width, pad, 'a', print_limit );
continue;
}
if( *format == 'c' ) {
// char are converted to int then pushed on the stack
scr[0] = (char) va_arg( args, int );
scr[1] = '\0';
pc += __print_str( ctx, scr, width, pad, print_limit, false );
continue;
}
} else {
out:
__print_char( ctx, *format );
++pc;
}
}
if( ctx && ctx->_max_len ) {
*(ctx->_ptr) = '\0';
}
return pc;
}
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#define BLOCK_MEM_SIZE 1024
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int sprintf( char *out, const char *format, ... )
{
int retval = 0;
_print_ctx_t ctx;
va_list args;
ctx._ptr = out;
ctx._max_len = BLOCK_MEM_SIZE;
va_start( args, format );
retval = __print_fmt( &ctx, format, args );
va_end( args );
return retval;
}
int printf( const char *format, ... )
{
int retval = 0;
// memory_t* buf;
va_list args;
/*
buf = memory_alloc( 10 );
if( buf ) {
_print_ctx_t ctx;
ctx._ptr = (char*)buf->_data;
ctx._max_len = BLOCK_MEM_SIZE;
va_start( args, format );
retval = __print_fmt( &ctx, format, args );
va_end( args );
buf->_len = strlen( (const char*)buf->_data );
// LCD_WriteString( ll, buf );
ll++;
ll &= 0x03;
if( uart_task_send( buf ) == false ) {
memory_free( buf );
}
}
*/
va_start( args, format );
retval = __print_fmt( NULL, format, args );
va_end( args );
return retval;
}