/*
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
*/
/* Includes */
#include "libSmallPrintf/small_printf.h"
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
/*
putchar is the only external dependency for this file,
if you have a working putchar, leave it commented out.
If not, uncomment the define below and
replace outbyte(c) by your own function call.
*/
static void printchar(char **str, int c)
{
if (str)
{
**str = c;
++(*str);
}
#if defined SERIAL_UART1 || defined SERIAL_UART2 || defined SERIAL_UART3 || defined SERIAL_UART4
else
(void)PutCharSerial(c);
#endif
}
#define PAD_RIGHT 1
#define PAD_ZERO 2
static int prints(char **out, const char *string, int width, int pad)
{
register int pc = 0, padchar = ' ';
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 & PAD_ZERO)
padchar = '0';
}
if (!(pad & PAD_RIGHT))
{
for (; width > 0; --width)
{
printchar(out, padchar);
++pc;
}
}
for (; *string; ++string)
{
printchar(out, *string);
++pc;
}
for (; width > 0; --width)
{
printchar(out, padchar);
++pc;
}
return pc;
}
/* the following should be enough for 32 bit int */
#define PRINT_BUF_LEN 12
static int printi(char **out, int i, int b, int sg, int width, int pad, int letbase)
{
char print_buf[PRINT_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 prints(out, print_buf, width, pad);
}
if (sg && b == 10 && i < 0)
{
neg = 1;
u = -i;
}
s = print_buf + PRINT_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 & PAD_ZERO))
{
printchar(out, '-');
++pc;
--width;
}
else
{
*--s = '-';
}
}
return pc + prints(out, s, width, pad);
}
static int small_print(char **out, const char *format, va_list args)
{
register int width, pad;
register int pc = 0;
char scr[2];
for (; *format != 0; ++format)
{
if (*format == '%')
{
++format;
width = pad = 0;
if (*format == '\0')
break;
if (*format == '%')
goto out;
if (*format == '-')
{
++format;
pad = PAD_RIGHT;
}
while (*format == '0')
{
++format;
pad |= PAD_ZERO;
}
if ('*' == *format)
{
width
= va_arg(args
, int); // get width from next argument
format++;
}
else
{
for (; *format >= '0' && *format <= '9'; ++format)
{
width *= 10;
width += *format - '0';
}
}
if (*format == 'l')
{ /* skip l in ld etc */
format++;
}
if (*format == 's')
{
register char *s
= (char *)va_arg(args
, int);
pc += prints(out, s ? s : "(null)", width, pad);
continue;
}
if (*format == 'd')
{
pc
+= printi
(out
, va_arg(args
, int), 10, 1, width
, pad
, 'a');
continue;
}
if (*format == 'x')
{
pc
+= printi
(out
, va_arg(args
, int), 16, 0, width
, pad
, 'a');
continue;
}
if (*format == 'X')
{
pc
+= printi
(out
, va_arg(args
, int), 16, 0, width
, pad
, 'A');
continue;
}
if (*format == 'u')
{
pc
+= printi
(out
, va_arg(args
, int), 10, 0, width
, pad
, 'a');
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 += prints(out, scr, width, pad);
continue;
}
if (*format == 'n')
{ /* convert number printed so far and store in *va_arg( args, int)... */
*dp = pc;
continue;
}
}
else
{
out:
/* deal with LF -> CRLF mapping */
if (*format == '\n')
{
printchar(out, '\r');
++pc; // extra char
}
printchar(out, *format);
++pc;
}
}
if (out)
**out = '\0';
return pc;
}
int small_printf(const char *format, ...)
{
int result = 0;
va_list args;
result = small_print(0, format, args);
return result;
}
int small_sprintf(char *out, const char *format, ...)
{
int result = 0;
va_list args;
result = small_print(&out, format, args);
return result;
}