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/*
* Copyright © 2019 Ebrahim Byagowi
*
* This is part of HarfBuzz, a text shaping library.
*
* Permission is hereby granted, without written agreement and without
* license or royalty fees, to use, copy, modify, and distribute this
* software and its documentation for any purpose, provided that the
* above copyright notice and the following two paragraphs appear in
* all copies of this software.
*
* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*
*/
#include "hb.hh"
#include "hb-machinery.hh"
#include "hb-number.hh"
#include "hb-number-parser.hh"
template<typename T, typename Func>
static bool
_parse_number (const char **pp, const char *end, T *pv,
bool whole_buffer, Func f)
{
char buf[32];
unsigned len = hb_min (ARRAY_LENGTH (buf) - 1, (unsigned) (end - *pp));
strncpy (buf, *pp, len);
buf[len] = '\0';
char *p = buf;
char *pend = p;
errno = 0;
*pv = f (p, &pend);
if (unlikely (errno || p == pend ||
/* Check if consumed whole buffer if is requested */
(whole_buffer && pend - p != end - *pp)))
return false;
*pp += pend - p;
return true;
}
bool
hb_parse_int (const char **pp, const char *end, int *pv, bool whole_buffer)
{
return _parse_number<int> (pp, end, pv, whole_buffer,
[] (const char *p, char **end)
{ return strtol (p, end, 10); });
}
bool
hb_parse_uint (const char **pp, const char *end, unsigned *pv,
bool whole_buffer, int base)
{
return _parse_number<unsigned> (pp, end, pv, whole_buffer,
[base] (const char *p, char **end)
{ return strtoul (p, end, base); });
}
bool
hb_parse_double (const char **pp, const char *end, double *pv, bool whole_buffer)
{
const char *pend = end;
*pv = strtod_rl (*pp, &pend);
if (unlikely (*pp == pend)) return false;
*pp = pend;
return !whole_buffer || end == pend;
}
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