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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, const char** src, int base, int* nump) {
const 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, const char* fmt, va_list va) {
// This used to handle max of 12, but binary support jumps this to at least 32
char bf[36];
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 'b':
#ifdef PRINTF_LONG_SUPPORT
if (lng)
uli2a(va_arg(va, unsigned long int), 2, 0, bf);
else
#endif
ui2a(va_arg(va, unsigned int), 2, 0, bf);
putchw(putp, putf, w, lz, bf);
break;
case '%':
putf(putp, ch);
default:
break;
}
}
}
abort:;
}
void init_printf(void* putp, void (*putf)(void*, char)) {
stdout_putf = putf;
stdout_putp = putp;
}
int tfp_printf(const char* fmt, ...) {
va_list va;
va_start(va, fmt);
tfp_format(stdout_putp, stdout_putf, fmt, va);
va_end(va);
return 1;
}
static void putcp(void* p, char c) { *(*((char**)p))++ = c; }
int tfp_sprintf(char* s, const char* fmt, ...) {
va_list va;
va_start(va, fmt);
tfp_format(&s, putcp, fmt, va);
putcp(&s, 0);
va_end(va);
return 1;
}
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