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/*
* found at: http://www.sparetimelabs.com/tinyprintf/tinyprintf.php
* and: http://www.sparetimelabs.com/printfrevisited/printfrevisited.php
*/
/*
File: printf.c
Copyright (C) 2004 Kustaa Nyholm
This library 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 2.1 of the License, 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "printf.h"
typedef void (*putcf) (void*,char);
static putcf stdout_putf;
static void* stdout_putp;
// this adds cca 400 bytes
#define PRINTF_LONG_SUPPORT
#ifdef PRINTF_LONG_SUPPORT
static void uli2a(unsigned long int num, unsigned int base, int uc,char * bf)
{
int n=0;
unsigned int d=1;
while (num/d >= base)
d*=base;
while (d!=0) {
int dgt = num / d;
num%=d;
d/=base;
if (n || dgt>0|| d==0) {
*bf++ = dgt+(dgt<10 ? '0' : (uc ? 'A' : 'a')-10);
++n;
}
}
*bf=0;
}
static void li2a (long num, char * bf)
{
if (num<0) {
num=-num;
*bf++ = '-';
}
uli2a(num,10,0,bf);
}
#endif
static void ui2a(unsigned int num, unsigned int base, int uc,char * bf)
{
int n=0;
unsigned int d=1;
while (num/d >= base)
d*=base;
while (d!=0) {
int dgt = num / d;
num%= d;
d/=base;
if (n || dgt>0 || d==0) {
*bf++ = dgt+(dgt<10 ? '0' : (uc ? 'A' : 'a')-10);
++n;
}
}
*bf=0;
}
static void i2a (int num, char * bf)
{
if (num<0) {
num=-num;
*bf++ = '-';
}
ui2a(num,10,0,bf);
}
static int a2d(char ch)
{
if (ch>='0' && ch<='9')
return ch-'0';
else if (ch>='a' && ch<='f')
return ch-'a'+10;
else if (ch>='A' && ch<='F')
return ch-'A'+10;
else return -1;
}
static char a2i(char ch, char** src,int base,int* nump)
{
char* p= *src;
int num=0;
int digit;
while ((digit=a2d(ch))>=0) {
if (digit>base) break;
num=num*base+digit;
ch=*p++;
}
*src=p;
*nump=num;
return ch;
}
static void putchw(void* putp,putcf putf,int n, char z, char* bf)
{
char fc=z? '0' : ' ';
char ch;
char* p=bf;
while (*p++ && n > 0)
n--;
while (n-- > 0)
putf(putp,fc);
while ((ch= *bf++))
putf(putp,ch);
}
void tfp_format(void* putp,putcf putf,char *fmt, va_list va)
{
char bf[12];
char ch;
while ((ch=*(fmt++))) {
if (ch!='%')
putf(putp,ch);
else {
char lz=0;
#ifdef PRINTF_LONG_SUPPORT
char lng=0;
#endif
int w=0;
ch=*(fmt++);
if (ch=='0') {
ch=*(fmt++);
lz=1;
}
if (ch>='0' && ch<='9') {
ch=a2i(ch,&fmt,10,&w);
}
#ifdef PRINTF_LONG_SUPPORT
if (ch=='l') {
ch=*(fmt++);
lng=1;
}
#endif
switch (ch) {
case 0:
goto abort;
case 'u' : {
#ifdef PRINTF_LONG_SUPPORT
if (lng)
uli2a(va_arg(va, unsigned long int),10,0,bf);
else
#endif
ui2a(va_arg(va, unsigned int),10,0,bf);
putchw(putp,putf,w,lz,bf);
break;
}
case 'd' : {
#ifdef PRINTF_LONG_SUPPORT
if (lng)
li2a(va_arg(va, unsigned long int),bf);
else
#endif
i2a(va_arg(va, int),bf);
putchw(putp,putf,w,lz,bf);
break;
}
case 'x': case 'X' :
#ifdef PRINTF_LONG_SUPPORT
if (lng)
uli2a(va_arg(va, unsigned long int),16,(ch=='X'),bf);
else
#endif
ui2a(va_arg(va, unsigned int),16,(ch=='X'),bf);
putchw(putp,putf,w,lz,bf);
break;
case 'c' :
putf(putp,(char)(va_arg(va, int)));
break;
case 's' :
putchw(putp,putf,w,0,va_arg(va, char*));
break;
case '%' :
putf(putp,ch);
default:
break;
}
}
}
abort:;
}
void init_printf(void* putp,void (*putf) (void*,char))
{
stdout_putf=putf;
stdout_putp=putp;
}
void tfp_printf(char *fmt, ...)
{
va_list va;
va_start(va,fmt);
tfp_format(stdout_putp,stdout_putf,fmt,va);
va_end(va);
}
static void putcp(void* p,char c)
{
*(*((char**)p))++ = c;
}
void tfp_sprintf(char* s,char *fmt, ...)
{
va_list va;
va_start(va,fmt);
tfp_format(&s,putcp,fmt,va);
putcp(&s,0);
va_end(va);
}
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