123 lines
2.9 KiB
C
123 lines
2.9 KiB
C
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/* ----------------------------------------------------------------------------
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libconfig - A library for processing structured configuration files
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Copyright (C) 2005-2018 Mark A Lindner
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This file is part of libconfig.
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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 License
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as published by the Free Software Foundation; either version 2.1 of
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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, but
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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.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, see
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<http://www.gnu.org/licenses/>.
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----------------------------------------------------------------------------
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*/
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#include "util.h"
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#include "wincompat.h"
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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/* ------------------------------------------------------------------------- */
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long long libconfig_parse_integer(const char *s, int *ok)
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{
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long long llval;
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char *endptr;
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int errsave = errno;
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errno = 0;
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llval = strtoll(s, &endptr, 0); /* base 10 or base 8 */
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if(*endptr || errno)
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{
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errno = 0;
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*ok = 0;
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return(0); /* parse error */
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}
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errno = errsave;
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*ok = 1;
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return(llval);
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}
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/* ------------------------------------------------------------------------- */
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unsigned long long libconfig_parse_hex64(const char *s)
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{
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#ifdef __MINGW32__
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/* MinGW's strtoull() seems to be broken; it only returns the lower
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* 32 bits...
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*/
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const char *p = s;
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unsigned long long val = 0;
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if(*p != '0')
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return(0);
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++p;
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if(*p != 'x' && *p != 'X')
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return(0);
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for(++p; isxdigit(*p); ++p)
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{
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val <<= 4;
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val |= ((*p < 'A') ? (*p & 0xF) : (9 + (*p & 0x7)));
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}
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return(val);
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#else /* ! __MINGW32__ */
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return(strtoull(s, NULL, 16));
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#endif /* __MINGW32__ */
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}
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/* ------------------------------------------------------------------------- */
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void libconfig_format_double(double val, int precision, int sci_ok, char *buf,
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size_t buflen)
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{
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const char *fmt = sci_ok ? "%.*g" : "%.*f";
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char *p, *q;
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snprintf(buf, buflen - 3, fmt, precision, val);
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/* Check for exponent. */
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p = strchr(buf, 'e');
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if(p) return;
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/* Check for decimal point. */
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p = strchr(buf, '.');
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if(!p)
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{
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/* No decimal point. Add trailing ".0". */
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strcat(buf, ".0");
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}
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else
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{
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/* Remove any excess trailing 0's after decimal point. */
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for(q = buf + strlen(buf) - 1; q > p + 1; --q)
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{
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if(*q == '0')
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*q = '\0';
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else
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break;
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}
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}
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}
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/* ------------------------------------------------------------------------- */
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