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/*-----------------------------------------------------------------
printfl.c - source file for reduced version of printf
Copyright (C) 1999, Sandeep Dutta . sandeep.dutta@usa.net
2001060401: Improved by was@icb.snz.chel.su
This library 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.
This library 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 this library; see the file COPYING. If not, write to the
Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston,
MA 02110-1301, USA.
As a special exception, if you link this library with other files,
some of which are compiled with SDCC, to produce an executable,
this library does not by itself cause the resulting executable to
be covered by the GNU General Public License. This exception does
not however invalidate any other reasons why the executable file
might be covered by the GNU General Public License.
-------------------------------------------------------------------------*/
/* following formats are supported :-
format output type argument-type
%d decimal int
%ld decimal long
%hd decimal char
%x hexadecimal int
%lx hexadecimal long
%hx hexadecimal char
%o octal int
%lo octal long
%ho octal char
%c character char
%s character generic pointer
*/
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
static __data char radix ;
static __bit long_flag = 0;
static __bit string_flag =0;
static __bit char_flag = 0;
static char * __data str ;
static __data long val;
/* This great loop fails with the ds390 port (2003-01-13).
At the beginning resp. end of the loop the compiler inserts a "push ar2"
resp. "pop ar2", which badly interferes with the push/pop in the source.
Library functions should be rock solid and portable. There's an _ltoa in
the library, so let's use it and don't reinvent the wheel.
Bernhard
*/
#if NICE_LIFO_IMPLEMENTATION_BUT_NOT_PORTABLE
/* just for the SP */
#include <8051.h>
static __data volatile char ch;
static __bit sign;
static void pval(void)
{
volatile char sp;
unsigned long lval;
sp = SP;
if (val < 0 && radix != 16)
{
lval = -val;
sign = 1;
}
else { sign = 0; lval = val;}
if (!long_flag) {
lval &= 0x0000ffff;
}
if (char_flag) {
lval &= 0x000000ff;
}
do
{
# if 1
if(radix != 16) ch = (lval % radix) + '0';
else ch = "0123456789ABCDEF"[(unsigned char)lval & 0x0f];
__asm push _ch __endasm;
lval /= radix;
# else
// This only looks more efficient, but isn't. see the .map
ch = (lval % radix) + '0';
if (ch>'9') ch+=7;
__asm push _ch __endasm;
lval /= radix;
# endif
}
while (lval);
if (sign) {
ch = '-';
__asm push _ch __endasm;
}
while (sp != SP) {
__asm pop _ch __endasm;
putchar(ch);
}
}
#endif
void printf_small (char * fmt, ... ) __reentrant
{
va_list ap ;
va_start(ap,fmt);
for (; *fmt ; fmt++ ) {
if (*fmt == '%') {
long_flag = string_flag = char_flag = 0;
fmt++ ;
switch (*fmt) {
case 'l':
long_flag = 1;
fmt++;
break;
case 'h':
char_flag = 1;
fmt++;
}
switch (*fmt) {
case 's':
string_flag = 1;
break;
case 'd':
radix = 10;
break;
case 'x':
radix = 16;
break;
case 'c':
radix = 0;
break;
case 'o':
radix = 8;
break;
}
if (string_flag) {
str = va_arg(ap, char *);
while (*str) putchar(*str++);
continue ;
}
if (long_flag)
val = va_arg(ap,long);
else
if (char_flag)
val = va_arg(ap,char);
else
val = va_arg(ap,int);
#if NICE_LIFO_IMPLEMENTATION_BUT_NOT_PORTABLE
if (radix) pval();
#else
if (radix)
{
static char __idata buffer[12]; /* 37777777777(oct) */
char __idata * stri;
_ltoa (val, buffer, radix);
stri = buffer;
while (*stri)
{
putchar (*stri);
stri++;
}
}
#endif
else
putchar((char)val);
} else
putchar(*fmt);
}
}
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