esp-fc

/*
 * Copyright (c) 2004,2012 Kustaa Nyholm / SpareTimeLabs
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this list
 * of conditions and the following disclaimer.
 *
 * 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.
 *
 * Neither the name of the Kustaa Nyholm or SpareTimeLabs 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 COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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.
 */

#include "printf.h"

typedef void (*putcf) (void*,char);
static putcf stdout_putf;
static void* stdout_putp;


#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 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);
	}
*/

static int putchw(void *putp, putcf putf, int n, char z, char *bf)
{
    int written = 0;
    char fc = z ? '0' : ' ';
    char ch;
    char *p = bf;
    while (*p++ && n > 0)
        n--;
    while (n-- > 0) {
        putf(putp, fc); written++;
    }
    while ((ch = *bf++)) {
        putf(putp, ch); written++;
    }
    return written;
}
/*
void tfp_format(void* putp, putcf putf, const 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:;
	return
	}
*/

int tfp_format(void *putp, putcf putf, const char *fmt, va_list va)
{
    char bf[12];
    int written = 0;
    char ch;

    while ((ch = *(fmt++))) {
        if (ch != '%') {
            putf(putp, ch); written++;
        } else {
            char lz = 0;
#ifdef  REQUIRE_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  REQUIRE_PRINTF_LONG_SUPPORT
            if (ch == 'l') {
                ch = *(fmt++);
                lng = 1;
            }
#endif
            switch (ch) {
            case 0:
                goto abort;
            case 'u':{
#ifdef  REQUIRE_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);
                    written += putchw(putp, putf, w, lz, bf);
                    break;
                }
            case 'd':{
#ifdef  REQUIRE_PRINTF_LONG_SUPPORT
                    if (lng)
                        li2a(va_arg(va, unsigned long int), bf);
                    else
#endif
                        i2a(va_arg(va, int), bf);
                    written += putchw(putp, putf, w, lz, bf);
                    break;
                }
            case 'x':
            case 'X':
#ifdef  REQUIRE_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);
                written += putchw(putp, putf, w, lz, bf);
                break;
            case 'c':
                putf(putp, (char) (va_arg(va, int))); written++;
                break;
            case 's':
                written += putchw(putp, putf, w, 0, va_arg(va, char *));
                break;
            case '%':
                putf(putp, ch); written++;
                break;
            case 'n':
                *va_arg(va, int*) = written;
                break;
            default:
                break;
            }
        }
    }
abort:
    return written;
}

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);
	}