arduino int64_t streaming serial print example

print_64t.ino

// sketch_oct16a
// printll provides printing for int64_t uint64_t types using Streaming..
// Rick Kimball

#include "Streaming.h"

char * _print_base(char *buf, uint64_t n, int base) {
  char *str = &buf[(64+1) - 1]; // handle printing bits

  *str = '\0'; // work from least significant digit to most
  do {
    unsigned digit = n % base;
    *--str = digit < 10 ? digit + '0' : digit + 'A' - 10;
  } while ( (n /= base) );

  return (str);
};

char * printll(char *work, int64_t ldata, int base = DEC)
{
  char *ptr = work;
  
  if ( base == DEC && ldata < 0 ) {
    ldata = -ldata;
    ptr = _print_base(&ptr[1], (uint64_t)ldata, base);
    *--ptr = '-';
  }
  else {
    ptr = _print_base(ptr, (uint64_t)ldata, base);
  }

  return ptr;
}

//---------------------------------------------------------------

const int64_t foos[] = 
{
  -32767,-32768,-32767,-32766,-32765,-32764, 
  -5,-4,-3,-2, -1, 0, 1, 2, 3, 4, 5,
  0x7FFFFFFFFFFFFFFE,0x7FFFFFFFFFFFFFFF,
  0xFFFFFFFFFFFFFFFE,0xFFFFFFFFFFFFFFFF,
};

void setup() {
  Serial.begin(9600);
  while(!Serial)
    ;
  delay(3000);
  Serial << endl << endl << "int64_t print test" << endl;
}

static unsigned indx=0;

void loop() {
  int64_t foo = foos[indx++];
  char work1[64+1];

  Serial << "foo="    << printll(work1,foo,DEC) << endl;
  Serial << "    0x"  << printll(work1,foo,HEX) << endl;
  Serial << "    \\0" << printll(work1,foo,OCT) << endl;
  Serial.print("    0b"); Serial.println(printll(work1,foo,BIN));
  if ( indx == sizeof(foos)/sizeof(foos[0]))
    while(1);
  //delay(1000);
}

#if 0 // output
int16_t print test
foo=-32767
    0xFFFFFFFFFFFF8001
    \01777777777777777700001
    0b1111111111111111111111111111111111111111111111111000000000000001
foo=-32768
    0xFFFFFFFFFFFF8000
    \01777777777777777700000
    0b1111111111111111111111111111111111111111111111111000000000000000
foo=-32767
    0xFFFFFFFFFFFF8001
    \01777777777777777700001
    0b1111111111111111111111111111111111111111111111111000000000000001
foo=-32766
    0xFFFFFFFFFFFF8002
    \01777777777777777700002
    0b1111111111111111111111111111111111111111111111111000000000000010
foo=-32765
    0xFFFFFFFFFFFF8003
    \01777777777777777700003
    0b1111111111111111111111111111111111111111111111111000000000000011
foo=-32764
    0xFFFFFFFFFFFF8004
    \01777777777777777700004
    0b1111111111111111111111111111111111111111111111111000000000000100
foo=-5
    0xFFFFFFFFFFFFFFFB
    \01777777777777777777773
    0b1111111111111111111111111111111111111111111111111111111111111011
foo=-4
    0xFFFFFFFFFFFFFFFC
    \01777777777777777777774
    0b1111111111111111111111111111111111111111111111111111111111111100
foo=-3
    0xFFFFFFFFFFFFFFFD
    \01777777777777777777775
    0b1111111111111111111111111111111111111111111111111111111111111101
foo=-2
    0xFFFFFFFFFFFFFFFE
    \01777777777777777777776
    0b1111111111111111111111111111111111111111111111111111111111111110
foo=0
    0x0
    \00
    0b0
foo=1
    0x1
    \01
    0b1
foo=2
    0x2
    \02
    0b10
foo=3
    0x3
    \03
    0b11
foo=4
    0x4
    \04
    0b100
foo=5
    0x5
    \05
    0b101
foo=9223372036854775806
    0x7FFFFFFFFFFFFFFE
    \0777777777777777777776
    0b111111111111111111111111111111111111111111111111111111111111110
foo=9223372036854775807
    0x7FFFFFFFFFFFFFFF
    \0777777777777777777777
    0b111111111111111111111111111111111111111111111111111111111111111
foo=-2
    0xFFFFFFFFFFFFFFFE
    \01777777777777777777776
    0b1111111111111111111111111111111111111111111111111111111111111110
foo=-1
    0xFFFFFFFFFFFFFFFF
    \01777777777777777777777
    0b1111111111111111111111111111111111111111111111111111111111111111
#endif