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