/* No need to parse '-' since that's handled as an operator.
This function also by mpq_expr_a, so it's not static. */
size_t
mpexpr_mpz_number (mpz_ptr res, __gmp_const char *e, size_t elen, int base)
{
char *edup;
size_t i, ret;
int base_effective = (base == 0 ? 10 : base);
void *(*allocate_func) (size_t);
void (*free_func) (void *, size_t);
i = 0;
if (e[i] == '0')
{
i++;
if (e[i] == 'x' || e[i] == 'b')
i++;
}
for ( ; i < elen; i++)
if (! isasciidigit_in_base (e[i], base_effective))
break;
mp_get_memory_functions (&allocate_func, NULL, &free_func);
edup = (*allocate_func) (i+1);
memcpy (edup, e, i);
edup[i] = '\0';
if (mpz_set_str (res, edup, base) == 0)
ret = i;
else
ret = 0;
(*free_func) (edup, i+1);
return ret;
}
static size_t
e_mpf_number (mpf_ptr res, const char *e, size_t elen, int base)
{
char *edup;
size_t i, ret, extra=0;
int mant_base, exp_base;
void *(*allocate_func) (size_t);
void (*free_func) (void *, size_t);
TRACE (printf ("mpf_number base=%d \"%.*s\"\n", base, (int) elen, e));
/* mpf_set_str doesn't currently accept 0x for hex in base==0, so do it
here instead. FIXME: Would prefer to let mpf_set_str handle this. */
if (base == 0 && elen >= 2 && e[0] == '0' && (e[1] == 'x' || e[1] == 'X'))
{
base = 16;
extra = 2;
e += extra;
elen -= extra;
}
if (base == 0)
mant_base = 10;
else if (base < 0)
mant_base = -base;
else
mant_base = base;
/* exponent in decimal if base is negative */
if (base < 0)
exp_base = 10;
else if (base == 0)
exp_base = 10;
else
exp_base = base;
#define IS_EXPONENT(c) \
(c == '@' || (base <= 10 && base >= -10 && (e[i] == 'e' || e[i] == 'E')))
i = 0;
for (;;)
{
if (i >= elen)
goto parsed;
if (e[i] == '.')
break;
if (IS_EXPONENT (e[i]))
goto exponent;
if (! isasciidigit_in_base (e[i], mant_base))
goto parsed;
i++;
}
/* fraction */
i++;
for (;;)
{
if (i >= elen)
goto parsed;
if (IS_EXPONENT (e[i]))
goto exponent;
if (! isasciidigit_in_base (e[i], mant_base))
goto parsed;
i++;
}
exponent:
i++;
if (i >= elen)
goto parsed;
if (e[i] == '-')
i++;
for (;;)
{
if (i >= elen)
goto parsed;
if (! isasciidigit_in_base (e[i], exp_base))
break;
i++;
}
parsed:
TRACE (printf (" parsed i=%u \"%.*s\"\n", i, (int) i, e));
mp_get_memory_functions (&allocate_func, NULL, &free_func);
edup = (*allocate_func) (i+1);
memcpy (edup, e, i);
edup[i] = '\0';
if (mpf_set_str (res, edup, base) == 0)
ret = i + extra;
else
ret = 0;
(*free_func) (edup, i+1);
return ret;
}
