diff options
Diffstat (limited to 'nuttx/libc/stdio/lib_libdtoa.c')
-rw-r--r-- | nuttx/libc/stdio/lib_libdtoa.c | 330 |
1 files changed, 0 insertions, 330 deletions
diff --git a/nuttx/libc/stdio/lib_libdtoa.c b/nuttx/libc/stdio/lib_libdtoa.c deleted file mode 100644 index 395a55b61..000000000 --- a/nuttx/libc/stdio/lib_libdtoa.c +++ /dev/null @@ -1,330 +0,0 @@ -/**************************************************************************** - * libc/unistd/lib_libdtoa.c - * - * This file was ported to NuttX by Yolande Cates. - * - * Copyright (c) 1990, 1993 - * The Regents of the University of California. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Chris Torek. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. 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. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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. - * - ****************************************************************************/ - -/**************************************************************************** - * Included Files - ****************************************************************************/ -#include <math.h> - -/**************************************************************************** - * Pre-processor Definitions - ****************************************************************************/ - -#define MAX_PREC 16 - -#ifndef MIN -# define MIN(a,b) (a < b ? a : b) -#endif - -#ifndef MAX -# define MAX(a,b) (a > b ? a : b) -#endif - -/**************************************************************************** - * Private Type Declarations - ****************************************************************************/ - -/**************************************************************************** - * Private Function Prototypes - ****************************************************************************/ - -/**************************************************************************** - * Global Constant Data - ****************************************************************************/ - -/**************************************************************************** - * Global Variables - ****************************************************************************/ - -/**************************************************************************** - * Private Constant Data - ****************************************************************************/ - -/**************************************************************************** - * Private Variables - ****************************************************************************/ - -/**************************************************************************** - * Name: zeroes - * - * Description: - * Print the specified number of zeres - * - ****************************************************************************/ - -static void zeroes(FAR struct lib_outstream_s *obj, int nzeroes) -{ - int i; - - for (i = nzeroes; i > 0; i--) - { - obj->put(obj, '0'); - } -} - -/**************************************************************************** - * Private Functions - ****************************************************************************/ - -static void lib_dtoa_string(FAR struct lib_outstream_s *obj, const char *str) -{ - while (*str) { - obj->put(obj, *str++); - } -} - -/**************************************************************************** - * Name: lib_dtoa - * - * Description: - * This is part of lib_vsprintf(). It handles the floating point formats. - * This version supports only the %f (with precision). If no precision - * was provided in the format, this will use precision == 0 which is - * probably not what you want. - * - * Input Parameters: - * obj - The output stream object - * fmt - The format character. Not used 'f' is always assumed - * prec - The number of digits to the right of the decimal point. If no - * precision is provided in the format, this will be zero. And, - * unfortunately in this case, it will be treated literally as - * a precision of zero. - * flags - Only ALTFORM and SHOWPLUS flags are supported. ALTFORM only - * applies if prec == 0 which is not supported anyway. - * value - The floating point value to convert. - * - ****************************************************************************/ - -static void lib_dtoa(FAR struct lib_outstream_s *obj, int fmt, int prec, - uint8_t flags, double value) -{ - FAR char *digits; /* String returned by __dtoa */ - FAR char *digalloc; /* Copy of digits to be freed after usage */ - FAR char *rve; /* Points to the end of the return value */ - int expt; /* Integer value of exponent */ - int numlen; /* Actual number of digits returned by cvt */ - int nchars; /* Number of characters to print */ - int dsgn; /* Unused sign indicator */ - int i; - bool done_decimal_point = false; - - /* special handling for NaN and Infinity */ - if (isnan(value)) { - lib_dtoa_string(obj, "NaN"); - return; - } - if (isinf(value)) { - if (value < 0.0d) { - obj->put(obj, '-'); - } - lib_dtoa_string(obj, "Infinity"); - return; - } - - /* Non-zero... positive or negative */ - - if (value < 0) - { - value = -value; - SET_NEGATE(flags); - } - - /* Perform the conversion */ - - digits = __dtoa(value, 3, prec, &expt, &dsgn, &rve); - digalloc = digits; - numlen = rve - digits; - - if (IS_NEGATE(flags)) - { - obj->put(obj, '-'); - } - else if (IS_SHOWPLUS(flags)) - { - obj->put(obj, '+'); - } - - /* Special case exact zero or the case where the number is smaller than - * the print precision. - */ - - if (value == 0 || expt < -prec) - { - /* kludge for __dtoa irregularity */ - - obj->put(obj, '0'); - - /* A decimal point is printed only in the alternate form or if a - * particular precision is requested. - */ - - if (prec > 0 || IS_ALTFORM(flags)) - { - obj->put(obj, '.'); - done_decimal_point = true; - - /* Always print at least one digit to the right of the decimal point. */ - - prec = MAX(1, prec); - } - } - - /* A non-zero value will be printed */ - - else - { - - /* Handle the case where the value is less than 1.0 (in magnitude) and - * will need a leading zero. - */ - - if (expt <= 0) - { - /* Print a single zero to the left of the decimal point */ - - obj->put(obj, '0'); - - /* Print the decimal point */ - - obj->put(obj, '.'); - done_decimal_point = true; - - /* Print any leading zeros to the right of the decimal point */ - - if (expt < 0) - { - nchars = MIN(-expt, prec); - zeroes(obj, nchars); - prec -= nchars; - } - } - - /* Handle the general case where the value is greater than 1.0 (in - * magnitude). - */ - - else - { - /* Print the integer part to the left of the decimal point */ - - for (i = expt; i > 0; i--) - { - if (*digits != '\0') - { - obj->put(obj, *digits); - digits++; - } - else - { - obj->put(obj, '0'); - } - } - - /* Get the length of the fractional part */ - - numlen -= expt; - - /* If there is no fractional part, then a decimal point is printed - * only in the alternate form or if a particular precision is - * requested. - */ - - if (numlen > 0 || prec > 0 || IS_ALTFORM(flags)) - { - /* Print the decimal point */ - - obj->put(obj, '.'); - done_decimal_point = true; - - /* Always print at least one digit to the right of the decimal - * point. - */ - - prec = MAX(1, prec); - } - } - - /* If a precision was specified, then limit the number digits to the - * right of the decimal point. - */ - - if (prec > 0) - { - nchars = MIN(numlen, prec); - } - else - { - nchars = numlen; - } - - /* Print the fractional part to the right of the decimal point */ - - for (i = nchars; i > 0; i--) - { - obj->put(obj, *digits); - digits++; - } - - /* Decremnt to get the number of trailing zeroes to print */ - - prec -= nchars; - } - - /* Finally, print any trailing zeroes */ - if (done_decimal_point) { - zeroes(obj, prec); - } - - /* Is this memory supposed to be freed or not? */ - -#if 0 - if (digalloc) - { - free(digalloc); - } -#endif -} - -/**************************************************************************** - * Public Functions - ****************************************************************************/ - |