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/* melder_ftoa.cpp
*
* Copyright (C) 1992-2011 Paul Boersma
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* pb 2002/03/07 GPL
* pb 2002/11/30 Melder_fixed
* pb 2002/12/01 Melder_single, Melder_half
* pb 2003/05/13 Melder_percent
* pb 2003/05/19 Melder_fixed: include a minimum precision of 1 digit
* pb 2004/04/04 Melder_bigInteger
* pb 2006/04/16 separated from melder.c
* pb 2006/12/10 A and W versions
* pb 2006/12/29 removed future bug
* pb 2007/11/30 Melder_float
* pb 2008/01/06 Mac: use strtod instead of wcstod for speed
* pb 2010/10/16 Melder_naturalLogarithm
* pb 2011/04/05 C++
*/
#include "melder.h"
#include "NUM.h"
/********** NUMBER TO STRING CONVERSION **********/
#define NUMBER_OF_BUFFERS 32
/* = maximum number of arguments to a function call */
#define MAXIMUM_NUMERIC_STRING_LENGTH 386
/* = sign + 308 + point + 60 + e + sign + 3 + null byte + (\.c10^^ - 1) + 4 extra */
static wchar_t buffers [NUMBER_OF_BUFFERS] [MAXIMUM_NUMERIC_STRING_LENGTH + 1];
static int ibuffer = 0;
const wchar_t * Melder_integer (long value) {
if (++ ibuffer == NUMBER_OF_BUFFERS) ibuffer = 0;
swprintf (buffers [ibuffer], MAXIMUM_NUMERIC_STRING_LENGTH, L"%ld", value);
return buffers [ibuffer];
}
const wchar_t * Melder_bigInteger (double value) {
wchar_t *text;
int trillions, billions, millions, thousands, units, firstDigitPrinted = FALSE;
if (fabs (value) > 1e15) return Melder_double (value);
if (++ ibuffer == NUMBER_OF_BUFFERS) ibuffer = 0;
text = buffers [ibuffer];
text [0] = L'\0';
if (value < 0.0) {
swprintf (text, MAXIMUM_NUMERIC_STRING_LENGTH, L"-");
value = - value;
}
trillions = floor (value / 1e12);
value -= trillions * 1e12;
billions = floor (value / 1e9);
value -= billions * 1e9;
millions = floor (value / 1e6);
value -= millions * 1e6;
thousands = floor (value / 1e3);
value -= thousands * 1e3;
units = value;
if (trillions) {
swprintf (text + wcslen (text), MAXIMUM_NUMERIC_STRING_LENGTH, L"%d,", trillions);
firstDigitPrinted = TRUE;
}
if (billions || firstDigitPrinted) {
swprintf (text + wcslen (text), MAXIMUM_NUMERIC_STRING_LENGTH, firstDigitPrinted ? L"%03d," : L"%d,", billions);
firstDigitPrinted = TRUE;
}
if (millions || firstDigitPrinted) {
swprintf (text + wcslen (text), MAXIMUM_NUMERIC_STRING_LENGTH, firstDigitPrinted ? L"%03d," : L"%d,", millions);
firstDigitPrinted = TRUE;
}
if (thousands || firstDigitPrinted) {
swprintf (text + wcslen (text), MAXIMUM_NUMERIC_STRING_LENGTH, firstDigitPrinted ? L"%03d," : L"%d,", thousands);
firstDigitPrinted = TRUE;
}
swprintf (text + wcslen (text), MAXIMUM_NUMERIC_STRING_LENGTH, firstDigitPrinted ? L"%03d" : L"%d", units);
return text;
}
const wchar_t * Melder_boolean (bool value) {
return value ? L"yes" : L"no";
}
const wchar * Melder_double (double value) {
if (value == NUMundefined) return L"--undefined--";
if (++ ibuffer == NUMBER_OF_BUFFERS) ibuffer = 0;
#if defined (macintosh)
/*
* OPTIMIZATION: strtod may be 100 times faster than wcstod on the Mac. 20080106
*/
static char buffer [MAXIMUM_NUMERIC_STRING_LENGTH + 1];
sprintf (buffer, "%.15g", value);
if (strtod (buffer, NULL) != value) {
sprintf (buffer, "%.16g", value);
if (strtod (buffer, NULL) != value) {
sprintf (buffer, "%.17g", value);
}
}
#if 0
wchar_t *to = & buffers [ibuffer] [0];
char *from = & buffer [0];
for (; (*to++ = *from++) != '\0';) ;
*to = '\0';
#else
Melder_8bitToWcs_inline (buffer, buffers [ibuffer], kMelder_textInputEncoding_UTF8); // guaranteed not to fail
#endif
#else
swprintf (buffers [ibuffer], MAXIMUM_NUMERIC_STRING_LENGTH, L"%.15g", value);
if (wcstod (buffers [ibuffer], NULL) != value) {
swprintf (buffers [ibuffer], MAXIMUM_NUMERIC_STRING_LENGTH, L"%.16g", value);
if (wcstod (buffers [ibuffer], NULL) != value) {
swprintf (buffers [ibuffer], MAXIMUM_NUMERIC_STRING_LENGTH, L"%.17g", value);
}
}
#endif
return buffers [ibuffer];
}
const wchar_t * Melder_single (double value) {
if (value == NUMundefined) return L"--undefined--";
if (++ ibuffer == NUMBER_OF_BUFFERS) ibuffer = 0;
swprintf (buffers [ibuffer], MAXIMUM_NUMERIC_STRING_LENGTH, L"%.9g", value);
return buffers [ibuffer];
}
const wchar_t * Melder_half (double value) {
if (value == NUMundefined) return L"--undefined--";
if (++ ibuffer == NUMBER_OF_BUFFERS) ibuffer = 0;
swprintf (buffers [ibuffer], MAXIMUM_NUMERIC_STRING_LENGTH, L"%.4g", value);
return buffers [ibuffer];
}
const wchar_t * Melder_fixed (double value, int precision) {
int minimumPrecision;
if (value == NUMundefined) return L"--undefined--";
if (value == 0.0) return L"0";
if (++ ibuffer == NUMBER_OF_BUFFERS) ibuffer = 0;
if (precision > 60) precision = 60;
minimumPrecision = - (int) floor (log10 (value));
swprintf (buffers [ibuffer], MAXIMUM_NUMERIC_STRING_LENGTH, L"%.*f",
minimumPrecision > precision ? minimumPrecision : precision, value);
return buffers [ibuffer];
}
const wchar_t * Melder_fixedExponent (double value, int exponent, int precision) {
double factor = pow (10, exponent);
int minimumPrecision;
if (value == NUMundefined) return L"--undefined--";
if (value == 0.0) return L"0";
if (++ ibuffer == NUMBER_OF_BUFFERS) ibuffer = 0;
if (precision > 60) precision = 60;
value /= factor;
minimumPrecision = - (int) floor (log10 (value));
swprintf (buffers [ibuffer], MAXIMUM_NUMERIC_STRING_LENGTH, L"%.*fE%d",
minimumPrecision > precision ? minimumPrecision : precision, value, exponent);
return buffers [ibuffer];
}
const wchar_t * Melder_percent (double value, int precision) {
int minimumPrecision;
if (value == NUMundefined) return L"--undefined--";
if (value == 0.0) return L"0";
if (++ ibuffer == NUMBER_OF_BUFFERS) ibuffer = 0;
if (precision > 60) precision = 60;
value *= 100.0;
minimumPrecision = - (int) floor (log10 (value));
swprintf (buffers [ibuffer], MAXIMUM_NUMERIC_STRING_LENGTH, L"%.*f%%",
minimumPrecision > precision ? minimumPrecision : precision, value);
return buffers [ibuffer];
}
const wchar_t * Melder_float (const wchar_t *number) {
if (++ ibuffer == NUMBER_OF_BUFFERS) ibuffer = 0;
if (wcschr (number, 'e') == NULL) {
wcscpy (buffers [ibuffer], number);
} else {
wchar_t *b = buffers [ibuffer];
const wchar_t *n = number;
while (*n != 'e') *(b++) = *(n++); *b = '\0';
if (number [0] == '1' && number [1] == 'e') {
wcscpy (buffers [ibuffer], L"10^^"); b = buffers [ibuffer] + 4;
} else {
wcscat (buffers [ibuffer], L"\\.c10^^"); b += 7;
}
Melder_assert (*n == 'e');
if (*++n == '+') n ++; /* Ignore leading plus sign in exponent. */
if (*n == '-') *(b++) = *(n++); /* Copy sign of negative exponent. */
while (*n == '0') n ++; /* Ignore leading zeroes in exponent. */
while (*n >= '0' && *n <= '9') *(b++) = *(n++);
*(b++) = '^';
while (*n != '\0') *(b++) = *(n++); *b = '\0';
}
return buffers [ibuffer];
}
const wchar_t * Melder_naturalLogarithm (double lnNumber) {
if (lnNumber == NUMundefined) return L"--undefined--";
if (lnNumber == -INFINITY) return L"0";
double log10Number = lnNumber * NUMlog10e;
if (log10Number < -41) {
if (++ ibuffer == NUMBER_OF_BUFFERS) ibuffer = 0;
long ceiling = ceil (log10Number);
double remainder = log10Number - ceiling;
double remainder10 = pow (10, remainder);
while (remainder10 < 1.0) {
remainder10 *= 10;
ceiling --;
}
swprintf (buffers [ibuffer], MAXIMUM_NUMERIC_STRING_LENGTH, L"%.15g", remainder10);
if (wcstod (buffers [ibuffer], NULL) != remainder10) {
swprintf (buffers [ibuffer], MAXIMUM_NUMERIC_STRING_LENGTH, L"%.16g", remainder10);
if (wcstod (buffers [ibuffer], NULL) != remainder10) swprintf (buffers [ibuffer], MAXIMUM_NUMERIC_STRING_LENGTH, L"%.17g", remainder10);
}
swprintf (buffers [ibuffer] + wcslen (buffers [ibuffer]), 100, L"e-%ld", ceiling);
} else {
return Melder_double (exp (lnNumber));
}
return buffers [ibuffer];
}
/* End of file melder_ftoa.cpp */
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