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#34: Parsing float for mpfr

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Louis Rubet 2017-04-29 15:40:55 +02:00
parent 9732561f35
commit 10a24649c6
1 changed files with 17 additions and 14 deletions
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31
src/parse.h
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@ -327,27 +327,30 @@ static bool get_program(const string& entry, program& prog, string& remaining_en
// care: not threadsafe
static bool get_float(const string& entry, program& prog, string& remaining_entry)
{
static number new_number;
char* endptr;
bool ret = false;
if (entry.size() > 0)
{
// TODO dans la mesure du possible, ne pas allouer sur la pile pour désallouer après (?)
// mais faire un parse avec une autre fonction que mpfr_strtofr puis seulement si ok faire mpfr_strtofr
void* significand;
number* num = (number*)prog.allocate_back((unsigned int)sizeof(number), cmd_number, MPFR_128BITS_STORING_LENGTH, &significand);
num->init(significand);
if ((mpfr_strtofr(&num->_value.mpfr, entry.c_str(), &endptr, 0, MPFR_DEF_RND) != -1) && (endptr != entry.c_str()))
// pre parse to avoid doing a useless allocation
// detect the begining of a number, including nan, inf, @nan@, @inf@
if (entry.find_first_of("+-0123456789.ni@", 0) == 0)
{
ret = true;
// remaining string if any
if (endptr != NULL)
remaining_entry = endptr;
void* significand;
number* num = (number*)prog.allocate_back((unsigned int)sizeof(number), cmd_number, MPFR_128BITS_STORING_LENGTH, &significand);
num->init(significand);
int mpfr_ret = mpfr_strtofr(&num->_value.mpfr, entry.c_str(), &endptr, 0, MPFR_DEF_RND);
if (endptr != entry.c_str())
{
ret = true;
// remaining string if any
if (endptr != NULL)
remaining_entry = endptr;
}
else
(void)prog.pop_back();
}
else
(void)prog.pop_back();
}
return ret;