binPrintf.cpp

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/*
  Copyright 2001 Georges Menie
  https://www.menie.org/georges/embedded/small_printf_source_code.html

  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
*/

#include "sick_scan/binPrintf.hpp"
#include <stdio.h>
#define BIN_SPRINTF_MAX_LEN (10240)
static void binPrintchar(char **str, int c)
{
        extern int putchar(int c);
        if (str) {
                **str = c;
                ++(*str);
        }
        else (void)putchar(c);
}

#define PAD_RIGHT 1
#define PAD_ZERO 2

static int binPrints(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) {
                        binPrintchar (out, padchar);
                        ++pc;
                }
        }
        for ( ; *string ; ++string) {
                binPrintchar (out, *string);
                ++pc;
        }
        for ( ; width > 0; --width) {
                binPrintchar (out, padchar);
                ++pc;
        }

        return pc;
}

/* the following should be enough for 32 bit int */
#define PRINT_BUF_LEN 12

static int binPrinti(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 (b == 1)
        {
                int cnt = 0;
                while (width > 0)
                {
                        ++pc;
                        ++cnt;
                        --width;
                        char ch = (char)(0xFF & (i >> (width * 8)));
                        binPrintchar(out, ch);
                }
                return(cnt);
        }

        if (i == 0) {
                print_buf[0] = '0';
                print_buf[1] = '\0';
                return binPrints (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) ) {
                        binPrintchar (out, '-');
                        ++pc;
                        --width;
                }
                else {
                        *--s = '-';
                }
        }

        return pc + binPrints (out, s, width, pad);
}

static int binPrint(char **out, long long *varg)
{
        int width, pad;
        int pc = 0;
        char *format = (char *)(*varg++);
        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;
                        }
                        for ( ; *format >= '0' && *format <= '9'; ++format) {
                                width *= 10;
                                width += *format - '0';
                        }
                        if( *format == 's' ) {
                                register char *s = *((char **)varg++);
                                pc += binPrints (out, s?s:"(null)", width, pad);
                                continue;
                        }
                        if( *format == 'd' ) {
                                pc += binPrinti (out, *varg++, 10, 1, width, pad, 'a');
                                continue;
                        }
                        if( *format == 'x' ) {
                                pc += binPrinti (out, *varg++, 16, 0, width, pad, 'a');
                                continue;
                        }
                        if( *format == 'X' ) {
                                pc += binPrinti (out, *varg++, 16, 0, width, pad, 'A');
                                continue;
                        }
                        if (*format == 'y') {
                                pc += binPrinti(out, *varg++, 1, 0, width, pad, 'A');
                                continue;
                        }
                        if( *format == 'u' ) {
                                pc += binPrinti (out, *varg++, 10, 0, width, pad, 'a');
                                continue;
                        }
                        if( *format == 'c' ) {
                                /* char are converted to int then pushed on the stack */
                                scr[0] = *varg++;
                                scr[1] = '\0';
                                pc += binPrints (out, scr, width, pad);
                                continue;
                        }
                }
                else {
                out:
                        binPrintchar (out, *format);
                        ++pc;
                }
        }
        if (out) **out = '\0';
        return pc;
}

/* assuming sizeof(void *) == sizeof(int) */

int binPrintf(const char *format, ...)
{
        long long *varg = (long long *)(&format);
        return binPrint(0, varg);
}

int binSprintf(char *out, const char *format, ...)
{
        long long *varg = (long long *)(&format);
        return binPrint(&out, varg);
}

int binSprintfVec(std::vector<unsigned char>* outvec, const char *fmt, ...)
{
        outvec->clear();
        char buffer[BIN_SPRINTF_MAX_LEN];
        char *bufferPtr = &(buffer[0]);
        void *tttt = &fmt;
        long long *varg = (long long *)(&fmt);
        int retCode = binPrint(&bufferPtr, varg);
        if (retCode > 0)
        {
                for (int i = 0; i < retCode; i++)
                {
                        outvec->push_back(buffer[i]);
                }
        }

        return retCode;
}


std::string binDumpVecToString(std::vector<unsigned char>* outvec, bool appendReadableText /*= false*/)
{
        std::string s;
        for (int i = 0; i < outvec->size(); i++)
        {
                char szDummy[255] = { 0 };
                sprintf(szDummy, "%02x ", (int)(0xFF & (*outvec)[i]));
                s += szDummy;
        }
        if (appendReadableText)
        {
                for (int i = 0; i < outvec->size(); i++)
                {
                        char szDummy[255] = { 0 };
                        sprintf(szDummy, "%c", (*outvec)[i] < 0x20 ? '.' : (*outvec)[i]);
                        s += szDummy;
                }
        }
        return(s);
}