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60a69daec6
This patch adds missing newlines, trims multiple redundant final newlines into a single one, and trims redundant leading newlines. According to POSIX, a line is a sequence of zero or more non-' <newline>' characters plus a terminating '<newline>' character. [1] Files should normally have at least one final newline character. C89 [2] and later standards [3] mention a final newline: "A source file that is not empty shall end in a new-line character, which shall not be immediately preceded by a backslash character." Although it is not mandatory for all files to have a final newline fixed, a more consistent and homogeneous approach brings less of commit differences issues and a better development experience in certain text editors and IDEs. [1] http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap03.html#tag_03_206 [2] https://port70.net/~nsz/c/c89/c89-draft.html#2.1.1.2 [3] https://port70.net/~nsz/c/c99/n1256.html#5.1.1.2
112 lines
2.9 KiB
C
112 lines
2.9 KiB
C
/* str2num.c: bcmath library file. */
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/*
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Copyright (C) 1991, 1992, 1993, 1994, 1997 Free Software Foundation, Inc.
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Copyright (C) 2000 Philip A. Nelson
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details. (COPYING.LIB)
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to:
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The Free Software Foundation, Inc.
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59 Temple Place, Suite 330
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Boston, MA 02111-1307 USA.
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You may contact the author by:
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e-mail: philnelson@acm.org
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us-mail: Philip A. Nelson
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Computer Science Department, 9062
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Western Washington University
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Bellingham, WA 98226-9062
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*************************************************************************/
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#include <config.h>
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#include <stdio.h>
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#include <assert.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <stdarg.h>
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#include "bcmath.h"
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#include "private.h"
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/* Convert strings to bc numbers. Base 10 only.*/
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void
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bc_str2num (bc_num *num, char *str, int scale)
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{
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int digits, strscale;
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char *ptr, *nptr;
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char zero_int;
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/* Prepare num. */
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bc_free_num (num);
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/* Check for valid number and count digits. */
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ptr = str;
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digits = 0;
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strscale = 0;
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zero_int = FALSE;
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if ( (*ptr == '+') || (*ptr == '-')) ptr++; /* Sign */
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while (*ptr == '0') ptr++; /* Skip leading zeros. */
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while (isdigit((int)*ptr)) ptr++, digits++; /* digits */
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if (*ptr == '.') ptr++; /* decimal point */
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while (isdigit((int)*ptr)) ptr++, strscale++; /* digits */
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if ((*ptr != '\0') || (digits+strscale == 0))
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{
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*num = bc_copy_num (BCG(_zero_));
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return;
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}
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/* Adjust numbers and allocate storage and initialize fields. */
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strscale = MIN(strscale, scale);
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if (digits == 0)
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{
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zero_int = TRUE;
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digits = 1;
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}
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*num = bc_new_num (digits, strscale);
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/* Build the whole number. */
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ptr = str;
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if (*ptr == '-')
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{
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(*num)->n_sign = MINUS;
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ptr++;
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}
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else
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{
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(*num)->n_sign = PLUS;
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if (*ptr == '+') ptr++;
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}
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while (*ptr == '0') ptr++; /* Skip leading zeros. */
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nptr = (*num)->n_value;
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if (zero_int)
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{
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*nptr++ = 0;
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digits = 0;
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}
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for (;digits > 0; digits--)
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*nptr++ = CH_VAL(*ptr++);
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/* Build the fractional part. */
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if (strscale > 0)
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{
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ptr++; /* skip the decimal point! */
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for (;strscale > 0; strscale--)
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*nptr++ = CH_VAL(*ptr++);
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}
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if (bc_is_zero (*num))
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(*num)->n_sign = PLUS;
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}
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