/*
* mpfr.c - routines for arbitrary-precision number support in gawk.
*/
/*
* Copyright (C) 2012, 2013, 2015, 2017, 2018,
* the Free Software Foundation, Inc.
*
* This file is part of GAWK, the GNU implementation of the
* AWK Programming Language.
*
* GAWK is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* GAWK 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "awk.h"
#ifdef HAVE_MPFR
int MPFR_round_mode = 'N'; // default value
#if !defined(MPFR_VERSION_MAJOR) || MPFR_VERSION_MAJOR < 3
typedef mp_exp_t mpfr_exp_t;
#endif
extern NODE **fmt_list; /* declared in eval.c */
mpz_t mpzval; /* GMP integer type, used as temporary in few places */
mpz_t MNR;
mpz_t MFNR;
bool do_ieee_fmt; /* IEEE-754 floating-point emulation */
mpfr_rnd_t ROUND_MODE;
static mpfr_prec_t default_prec;
static mpfr_rnd_t get_rnd_mode(const char rmode);
static NODE *mpg_force_number(NODE *n);
static NODE *mpg_make_number(double);
static NODE *mpg_format_val(const char *format, int index, NODE *s);
static int mpg_interpret(INSTRUCTION **cp);
static mpfr_exp_t min_exp = MPFR_EMIN_DEFAULT;
static mpfr_exp_t max_exp = MPFR_EMAX_DEFAULT;
/* temporary MPFR floats used to hold converted GMP integer operands */
static mpfr_t _mpf_t1;
static mpfr_t _mpf_t2;
/*
* PRECISION_MIN is the precision used to initialize _mpf_t1 and _mpf_t2.
* 64 bits should be enough for exact conversion of most integers to floats.
*/
#define PRECISION_MIN 64
/* mf = { _mpf_t1, _mpf_t2 } */
static inline mpfr_ptr mpg_tofloat(mpfr_ptr mf, mpz_ptr mz);
/* T = {t1, t2} */
#define MP_FLOAT(T) is_mpg_integer(T) ? mpg_tofloat(_mpf_##T, (T)->mpg_i) : (T)->mpg_numbr
/* init_mpfr --- set up MPFR related variables */
void
init_mpfr(mpfr_prec_t prec, const char *rmode)
{
mpfr_set_default_prec(default_prec = prec);
ROUND_MODE = get_rnd_mode(rmode[0]);
mpfr_set_default_rounding_mode(ROUND_MODE);
make_number = mpg_make_number;
str2number = mpg_force_number;
format_val = mpg_format_val;
cmp_numbers = mpg_cmp;
mpz_init(MNR);
mpz_init(MFNR);
do_ieee_fmt = false;
mpfr_init2(_mpf_t1, PRECISION_MIN);
mpfr_init2(_mpf_t2, PRECISION_MIN);
mpz_init(mpzval);
register_exec_hook(mpg_interpret, 0);
}
/* cleanup_mpfr --- clean stuff up, mainly for valgrind */
void
cleanup_mpfr(void)
{
mpfr_clear(_mpf_t1);
mpfr_clear(_mpf_t2);
}
/* mpg_node --- allocate a node to store MPFR float or GMP integer */
NODE *
mpg_node(unsigned int flags)
{
NODE *r = make_number_node(flags);
if (flags == MPFN)
/* Initialize, set precision to the default precision, and value to NaN */
mpfr_init(r->mpg_numbr);
else
/* Initialize and set value to 0 */
mpz_init(r->mpg_i);
return r;
}
/*
* mpg_make_number --- make a arbitrary-precision number node
* and initialize with a C double
*/
static NODE *
mpg_make_number(double x)
{
NODE *r;
double ival;
if ((ival = double_to_int(x)) != x) {
int tval;
r = mpg_float();
tval = mpfr_set_d(r->mpg_numbr, x, ROUND_MODE);
IEEE_FMT(r->mpg_numbr, tval);
} else {
r = mpg_integer();
mpz_set_d(r->mpg_i, ival);
}
return r;
}
/* mpg_strtoui --- assign arbitrary-precision integral value from a string */
int
mpg_strtoui(mpz_ptr zi, char *str, size_t len, char **end, int base)
{
char *s = str;
char *start;
int ret = -1;
/*
* mpz_set_str does not like leading 0x or 0X for hex (or 0 for octal)
* with a non-zero base argument.
*/
if (base == 16 && len >= 2 && *s == '0' && (s[1] == 'x' || s[1] == 'X')) {
s += 2; len -= 2;
} else if (base == 8 && len >= 1 && *s == '0') {
s++; len--;
}
start = s;
while (len > 0) {
switch (*s) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
break;
case '8':
case '9':
if (base == 8)
goto done;
break;
case 'a':
case 'b':
case 'c':
case 'd':
case 'e':
case 'f':
case 'A':
case 'B':
case 'C':
case 'D':
case 'E':
case 'F':
if (base == 16)
break;
default:
goto done;
}
s++; len--;
}
done:
if (s > start) {
char save = *s;
*s = '\0';
ret = mpz_set_str(zi, start, base);
*s = save;
}
if (end != NULL)
*end = s;
return ret;
}
/* mpg_maybe_float --- test if a string may contain arbitrary-precision float */
static int
mpg_maybe_float(const char *str, int use_locale)
{
int dec_point = '.';
const char *s = str;
#if defined(HAVE_LOCALE_H)
/*
* loc.decimal_point may not have been initialized yet,
* so double check it before using it.
*/
if (use_locale && loc.decimal_point != NULL && loc.decimal_point[0] != '\0')
dec_point = loc.decimal_point[0]; /* XXX --- assumes one char */
#endif
if (strlen(s) >= 3
&& ( ( (s[0] == 'i' || s[0] == 'I')
&& (s[1] == 'n' || s[1] == 'N')
&& (s[2] == 'f' || s[2] == 'F'))
|| ( (s[0] == 'n' || s[0] == 'N')
&& (s[1] == 'a' || s[1] == 'A')
&& (s[2] == 'n' || s[2] == 'N'))))
return true;
for (; *s != '\0'; s++) {
if (*s == dec_point || *s == 'e' || *s == 'E')
return true;
}
return false;
}
/* mpg_zero --- initialize with arbitrary-precision integer(GMP) and set value to zero */
static inline void
mpg_zero(NODE *n)
{
if (is_mpg_float(n)) {
mpfr_clear(n->mpg_numbr);
n->flags &= ~MPFN;
}
if (! is_mpg_integer(n)) {
mpz_init(n->mpg_i); /* this also sets its value to 0 */
n->flags |= MPZN;
} else
mpz_set_si(n->mpg_i, 0);
}
/* force_mpnum --- force a value to be a GMP integer or MPFR float */
static int
force_mpnum(NODE *n, int do_nondec, int use_locale)
{
char *cp, *cpend, *ptr, *cp1;
char save;
int tval, base = 10;
if (n->stlen == 0) {
mpg_zero(n);
return false;
}
cp = n->stptr;
cpend = n->stptr + n->stlen;
while (cp < cpend && isspace((unsigned char) *cp))
cp++;
if (cp == cpend) { /* only spaces */
mpg_zero(n);
return false;
}
save = *cpend;
*cpend = '\0';
if (*cp == '+' || *cp == '-')
cp1 = cp + 1;
else
cp1 = cp;
if (do_nondec)
base = get_numbase(cp1, cpend - cp1, use_locale);
if (! mpg_maybe_float(cp1, use_locale)) {
mpg_zero(n);
errno = 0;
mpg_strtoui(n->mpg_i, cp1, cpend - cp1, & ptr, base);
if (*cp == '-')
mpz_neg(n->mpg_i, n->mpg_i);
goto done;
}
if (is_mpg_integer(n)) {
mpz_clear(n->mpg_i);
n->flags &= ~MPZN;
}
if (! is_mpg_float(n)) {
mpfr_init(n->mpg_numbr);
n->flags |= MPFN;
}
errno = 0;
tval = mpfr_strtofr(n->mpg_numbr, cp, & ptr, base, ROUND_MODE);
IEEE_FMT(n->mpg_numbr, tval);
done:
/* trailing space is OK for NUMBER */
while (ptr < cpend && isspace((unsigned char) *ptr))
ptr++;
*cpend = save;
if (errno == 0 && ptr == cpend)
return true;
errno = 0;
return false;
}
/* mpg_force_number --- force a value to be a multiple-precision number */
static NODE *
mpg_force_number(NODE *n)
{
if ((n->flags & NUMCUR) != 0)
return n;
n->flags |= NUMCUR;
if (force_mpnum(n, (do_non_decimal_data && ! do_traditional), true)) {
if ((n->flags & USER_INPUT) != 0) {
/* leave USER_INPUT set to indicate a strnum */
n->flags &= ~STRING;
n->flags |= NUMBER;
}
} else
n->flags &= ~USER_INPUT;
return n;
}
/* mpg_format_val --- format a numeric value based on format */
static NODE *
mpg_format_val(const char *format, int index, NODE *s)
{
NODE *dummy[2], *r;
unsigned int oflags;
/* create dummy node for a sole use of format_tree */
dummy[1] = s;
oflags = s->flags;
if (is_mpg_integer(s) || mpfr_integer_p(s->mpg_numbr)) {
/* integral value, use %d */
r = format_tree("%d", 2, dummy, 2);
s->stfmt = STFMT_UNUSED;
} else {
r = format_tree(format, fmt_list[index]->stlen, dummy, 2);
assert(r != NULL);
s->stfmt = index;
}
s->flags = oflags;
s->stlen = r->stlen;
if ((s->flags & (MALLOC|STRCUR)) == (MALLOC|STRCUR))
efree(s->stptr);
s->stptr = r->stptr;
s->flags |= STRCUR;
s->strndmode = MPFR_round_mode;
freenode(r); /* Do not unref(r)! We want to keep s->stptr == r->stpr. */
free_wstr(s);
return s;
}
/* mpg_cmp --- compare two numbers */
int
mpg_cmp(const NODE *t1, const NODE *t2)
{
/*
* For the purposes of sorting, NaN is considered greater than
* any other value, and all NaN values are considered equivalent and equal.
*/
if (is_mpg_float(t1)) {
if (is_mpg_float(t2)) {
if (mpfr_nan_p(t1->mpg_numbr))
return ! mpfr_nan_p(t2->mpg_numbr);
if (mpfr_nan_p(t2->mpg_numbr))
return -1;
return mpfr_cmp(t1->mpg_numbr, t2->mpg_numbr);
}
if (mpfr_nan_p(t1->mpg_numbr))
return 1;
return mpfr_cmp_z(t1->mpg_numbr, t2->mpg_i);
} else if (is_mpg_float(t2)) {
int ret;
if (mpfr_nan_p(t2->mpg_numbr))
return -1;
ret = mpfr_cmp_z(t2->mpg_numbr, t1->mpg_i);
return ret > 0 ? -1 : (ret < 0);
} else if (is_mpg_integer(t1)) {
return mpz_cmp(t1->mpg_i, t2->mpg_i);
}
/* t1 and t2 are AWKNUMs */
return cmp_awknums(t1, t2);
}
/*
* mpg_update_var --- update NR or FNR.
* NR_node->var_value(mpz_t) = MNR(mpz_t) * LONG_MAX + NR(long)
*/
NODE *
mpg_update_var(NODE *n)
{
NODE *val = n->var_value;
long nr = 0;
mpz_ptr nq = 0;
if (n == NR_node) {
nr = NR;
nq = MNR;
} else if (n == FNR_node) {
nr = FNR;
nq = MFNR;
} else
cant_happen();
if (mpz_sgn(nq) == 0) {
/* Efficiency hack similar to that for AWKNUM */
if (is_mpg_float(val) || mpz_get_si(val->mpg_i) != nr) {
unref(n->var_value);
val = n->var_value = mpg_integer();
mpz_set_si(val->mpg_i, nr);
}
} else {
unref(n->var_value);
val = n->var_value = mpg_integer();
mpz_set_si(val->mpg_i, nr);
mpz_addmul_ui(val->mpg_i, nq, LONG_MAX); /* val->mpg_i += nq * LONG_MAX */
}
return val;
}
/* mpg_set_var --- set NR or FNR */
long
mpg_set_var(NODE *n)
{
long nr = 0;
mpz_ptr nq = 0, r;
NODE *val = n->var_value;
if (n == NR_node)
nq = MNR;
else if (n == FNR_node)
nq = MFNR;
else
cant_happen();
if (is_mpg_integer(val))
r = val->mpg_i;
else {
/* convert float to integer */
mpfr_get_z(mpzval, val->mpg_numbr, MPFR_RNDZ);
r = mpzval;
}
nr = mpz_fdiv_q_ui(nq, r, LONG_MAX); /* nq (MNR or MFNR) is quotient */
return nr; /* remainder (NR or FNR) */
}
/* set_PREC --- update MPFR PRECISION related variables when PREC assigned to */
void
set_PREC()
{
long prec = 0;
NODE *val;
static const struct ieee_fmt {
const char *name;
mpfr_prec_t precision;
mpfr_exp_t emax;
mpfr_exp_t emin;
} ieee_fmts[] = {
{ "half", 11, 16, -23 }, /* binary16 */
{ "single", 24, 128, -148 }, /* binary32 */
{ "double", 53, 1024, -1073 }, /* binary64 */
{ "quad", 113, 16384, -16493 }, /* binary128 */
{ "oct", 237, 262144, -262377 }, /* binary256, not in the IEEE 754-2008 standard */
/*
* For any bitwidth = 32 * k ( k >= 4),
* precision = 13 + bitwidth - int(4 * log2(bitwidth))
* emax = 1 << bitwidth - precision - 1
* emin = 4 - emax - precision
*/
};
if (! do_mpfr)
return;
val = fixtype(PREC_node->var_value);
if ((val->flags & STRING) != 0) {
int i, j;
/* emulate IEEE-754 binary format */
for (i = 0, j = sizeof(ieee_fmts)/sizeof(ieee_fmts[0]); i < j; i++) {
if (strcasecmp(ieee_fmts[i].name, val->stptr) == 0)
break;
}
if (i < j) {
prec = ieee_fmts[i].precision;
/*
* We *DO NOT* change the MPFR exponent range using
* mpfr_set_{emin, emax} here. See format_ieee() for details.
*/
max_exp = ieee_fmts[i].emax;
min_exp = ieee_fmts[i].emin;
do_ieee_fmt = true;
}
}
if (prec <= 0) {
force_number(val);
prec = get_number_si(val);
if (prec < MPFR_PREC_MIN || prec > MPFR_PREC_MAX) {
force_string(val);
warning(_("PREC value `%.*s' is invalid"), (int) val->stlen, val->stptr);
prec = 0;
} else
do_ieee_fmt = false;
}
if (prec > 0)
mpfr_set_default_prec(default_prec = prec);
}
/* get_rnd_mode --- convert string to MPFR rounding mode */
static mpfr_rnd_t
get_rnd_mode(const char rmode)
{
switch (rmode) {
case 'N':
case 'n':
return MPFR_RNDN; /* round to nearest (IEEE-754 roundTiesToEven) */
case 'Z':
case 'z':
return MPFR_RNDZ; /* round toward zero (IEEE-754 roundTowardZero) */
case 'U':
case 'u':
return MPFR_RNDU; /* round toward plus infinity (IEEE-754 roundTowardPositive) */
case 'D':
case 'd':
return MPFR_RNDD; /* round toward minus infinity (IEEE-754 roundTowardNegative) */
#if defined(MPFR_VERSION_MAJOR) && MPFR_VERSION_MAJOR > 2
case 'A':
case 'a':
return MPFR_RNDA; /* round away from zero */
#endif
default:
break;
}
return -1;
}
/*
* set_ROUNDMODE --- update MPFR rounding mode related variables
* when ROUNDMODE assigned to
*/
void
set_ROUNDMODE()
{
if (do_mpfr) {
mpfr_rnd_t rndm = -1;
NODE *n;
n = force_string(ROUNDMODE_node->var_value);
if (n->stlen == 1)
rndm = get_rnd_mode(n->stptr[0]);
if (rndm != -1) {
mpfr_set_default_rounding_mode(rndm);
ROUND_MODE = rndm;
MPFR_round_mode = n->stptr[0];
} else
warning(_("RNDMODE value `%.*s' is invalid"), (int) n->stlen, n->stptr);
}
}
/* format_ieee --- make sure a number follows IEEE-754 floating-point standard */
int
format_ieee(mpfr_ptr x, int tval)
{
/*
* The MPFR doc says that it's our responsibility to make sure all numbers
* including those previously created are in range after we've changed the
* exponent range. Most MPFR operations and functions require
* the input arguments to have exponents within the current exponent range.
* Any argument outside the range results in a MPFR assertion failure
* like this:
*
* $ gawk -M 'BEGIN { x=1.0e-10000; print x+0; PREC="double"; print x+0}'
* 1e-10000
* init2.c:52: MPFR assertion failed ....
*
* A "naive" approach would be to keep track of the ternary state and
* the rounding mode for each number, and make sure it is in the current
* exponent range (using mpfr_check_range) before using it in an
* operation or function. Instead, we adopt the following strategy.
*
* When gawk starts, the exponent range is the MPFR default
* [MPFR_EMIN_DEFAULT, MPFR_EMAX_DEFAULT]. Any number that gawk
* creates must have exponent in this range (excluding infinities, NaNs and zeros).
* Each MPFR operation or function is performed with this default exponent
* range.
*
* When emulating IEEE-754 format, the exponents are *temporarily* changed,
* mpfr_check_range is called to make sure the number is in the new range,
* and mpfr_subnormalize is used to round following the rules of subnormal
* arithmetic. The exponent range is then *restored* to the original value
* [MPFR_EMIN_DEFAULT, MPFR_EMAX_DEFAULT].
*/
(void) mpfr_set_emin(min_exp);
(void) mpfr_set_emax(max_exp);
tval = mpfr_check_range(x, tval, ROUND_MODE);
tval = mpfr_subnormalize(x, tval, ROUND_MODE);
(void) mpfr_set_emin(MPFR_EMIN_DEFAULT);
(void) mpfr_set_emax(MPFR_EMAX_DEFAULT);
return tval;
}
/* do_mpfr_atan2 --- do the atan2 function */
NODE *
do_mpfr_atan2(int nargs)
{
NODE *t1, *t2, *res;
mpfr_ptr p1, p2;
int tval;
t2 = POP_SCALAR();
t1 = POP_SCALAR();
if (do_lint) {
if ((fixtype(t1)->flags & NUMBER) == 0)
lintwarn(_("atan2: received non-numeric first argument"));
if ((fixtype(t2)->flags & NUMBER) == 0)
lintwarn(_("atan2: received non-numeric second argument"));
}
force_number(t1);
force_number(t2);
p1 = MP_FLOAT(t1);
p2 = MP_FLOAT(t2);
res = mpg_float();
/* See MPFR documentation for handling of special values like +inf as an argument */
tval = mpfr_atan2(res->mpg_numbr, p1, p2, ROUND_MODE);
IEEE_FMT(res->mpg_numbr, tval);
DEREF(t1);
DEREF(t2);
return res;
}
/* do_mpfr_func --- run an MPFR function - not inline, for debugging */
static inline NODE *
do_mpfr_func(const char *name,
int (*mpfr_func)(), /* putting argument types just gets the compiler confused */
int nargs)
{
NODE *t1, *res;
mpfr_ptr p1;
int tval;
mpfr_prec_t argprec;
t1 = POP_SCALAR();
if (do_lint && (fixtype(t1)->flags & NUMBER) == 0)
lintwarn(_("%s: received non-numeric argument"), name);
force_number(t1);
p1 = MP_FLOAT(t1);
res = mpg_float();
if ((argprec = mpfr_get_prec(p1)) > default_prec)
mpfr_set_prec(res->mpg_numbr, argprec); /* needed at least for sqrt() */
tval = mpfr_func(res->mpg_numbr, p1, ROUND_MODE);
IEEE_FMT(res->mpg_numbr, tval);
DEREF(t1);
return res;
}
#define SPEC_MATH(X) \
NODE *result; \
result = do_mpfr_func(#X, mpfr_##X, nargs); \
return result
/* do_mpfr_sin --- do the sin function */
NODE *
do_mpfr_sin(int nargs)
{
SPEC_MATH(sin);
}
/* do_mpfr_cos --- do the cos function */
NODE *
do_mpfr_cos(int nargs)
{
SPEC_MATH(cos);
}
/* do_mpfr_exp --- exponential function */
NODE *
do_mpfr_exp(int nargs)
{
SPEC_MATH(exp);
}
/* do_mpfr_log --- the log function */
NODE *
do_mpfr_log(int nargs)
{
SPEC_MATH(log);
}
/* do_mpfr_sqrt --- do the sqrt function */
NODE *
do_mpfr_sqrt(int nargs)
{
SPEC_MATH(sqrt);
}
/* do_mpfr_int --- convert double to int for awk */
NODE *
do_mpfr_int(int nargs)
{
NODE *tmp, *r;
tmp = POP_SCALAR();
if (do_lint && (fixtype(tmp)->flags & NUMBER) == 0)
lintwarn(_("int: received non-numeric argument"));
force_number(tmp);
if (is_mpg_integer(tmp)) {
r = mpg_integer();
mpz_set(r->mpg_i, tmp->mpg_i);
} else {
if (! mpfr_number_p(tmp->mpg_numbr)) {
/* [+-]inf or NaN */
return tmp;
}
r = mpg_integer();
mpfr_get_z(r->mpg_i, tmp->mpg_numbr, MPFR_RNDZ);
}
DEREF(tmp);
return r;
}
/* do_mpfr_compl --- perform a ~ operation */
NODE *
do_mpfr_compl(int nargs)
{
NODE *tmp, *r;
mpz_ptr zptr;
tmp = POP_SCALAR();
if (do_lint && (fixtype(tmp)->flags & NUMBER) == 0)
lintwarn(_("compl: received non-numeric argument"));
force_number(tmp);
if (is_mpg_float(tmp)) {
mpfr_ptr p = tmp->mpg_numbr;
if (! mpfr_number_p(p)) {
/* [+-]inf or NaN */
return tmp;
}
if (mpfr_sgn(p) < 0)
fatal("%s",
mpg_fmt(_("compl(%Rg): negative value is not allowed"), p)
);
if (do_lint) {
if (! mpfr_integer_p(p))
lintwarn("%s",
mpg_fmt(_("comp(%Rg): fractional value will be truncated"), p)
);
}
mpfr_get_z(mpzval, p, MPFR_RNDZ); /* float to integer conversion */
zptr = mpzval;
} else {
/* (tmp->flags & MPZN) != 0 */
zptr = tmp->mpg_i;
if (mpz_sgn(zptr) < 0)
fatal("%s",
mpg_fmt(_("compl(%Zd): negative values are not allowed"), zptr)
);
}
r = mpg_integer();
mpz_com(r->mpg_i, zptr);
DEREF(tmp);
return r;
}
/* get_intval --- get the (converted) integral operand of a binary function. */
static mpz_ptr
get_intval(NODE *t1, int argnum, const char *op)
{
mpz_ptr pz;
if (do_lint && (fixtype(t1)->flags & NUMBER) == 0)
lintwarn(_("%s: received non-numeric argument #%d"), op, argnum);
(void) force_number(t1);
if (is_mpg_float(t1)) {
mpfr_ptr left = t1->mpg_numbr;
if (! mpfr_number_p(left)) {
/* inf or NaN */
if (do_lint)
lintwarn("%s",
mpg_fmt(_("%s: argument #%d has invalid value %Rg, using 0"),
op, argnum, left)
);
emalloc(pz, mpz_ptr, sizeof (mpz_t), "get_intval");
mpz_init(pz);
return pz; /* should be freed */
}
if (mpfr_sgn(left) < 0)
fatal("%s",
mpg_fmt(_("%s: argument #%d negative value %Rg is not allowed"),
op, argnum, left)
);
if (do_lint) {
if (! mpfr_integer_p(left))
lintwarn("%s",
mpg_fmt(_("%s: argument #%d fractional value %Rg will be truncated"),
op, argnum, left)
);
}
emalloc(pz, mpz_ptr, sizeof (mpz_t), "get_intval");
mpz_init(pz);
mpfr_get_z(pz, left, MPFR_RNDZ); /* float to integer conversion */
return pz; /* should be freed */
}
/* (t1->flags & MPZN) != 0 */
pz = t1->mpg_i;
if (mpz_sgn(pz) < 0)
fatal("%s",
mpg_fmt(_("%s: argument #%d negative value %Zd is not allowed"),
op, argnum, pz)
);
return pz; /* must not be freed */
}
/* free_intval --- free the converted integer value returned by get_intval() */
static inline void
free_intval(NODE *t, mpz_ptr pz)
{
if ((t->flags & MPZN) == 0) {
mpz_clear(pz);
efree(pz);
}
}
/* do_mpfr_lshift --- perform a << operation */
NODE *
do_mpfr_lshift(int nargs)
{
NODE *t1, *t2, *res;
unsigned long shift;
mpz_ptr pz1, pz2;
t2 = POP_SCALAR();
t1 = POP_SCALAR();
pz1 = get_intval(t1, 1, "lshift");
pz2 = get_intval(t2, 2, "lshift");
/*
* mpz_get_ui: If op is too big to fit an unsigned long then just
* the least significant bits that do fit are returned.
* The sign of op is ignored, only the absolute value is used.
*/
shift = mpz_get_ui(pz2); /* GMP integer => unsigned long conversion */
res = mpg_integer();
mpz_mul_2exp(res->mpg_i, pz1, shift); /* res = pz1 * 2^shift */
free_intval(t1, pz1);
free_intval(t2, pz2);
DEREF(t2);
DEREF(t1);
return res;
}
/* do_mpfr_rshift --- perform a >> operation */
NODE *
do_mpfr_rshift(int nargs)
{
NODE *t1, *t2, *res;
unsigned long shift;
mpz_ptr pz1, pz2;
t2 = POP_SCALAR();
t1 = POP_SCALAR();
pz1 = get_intval(t1, 1, "rshift");
pz2 = get_intval(t2, 2, "rshift");
/* N.B: See do_mpfp_lshift. */
shift = mpz_get_ui(pz2); /* GMP integer => unsigned long conversion */
res = mpg_integer();
mpz_fdiv_q_2exp(res->mpg_i, pz1, shift); /* res = pz1 / 2^shift, round towards -inf */
free_intval(t1, pz1);
free_intval(t2, pz2);
DEREF(t2);
DEREF(t1);
return res;
}
/* do_mpfr_and --- perform an & operation */
NODE *
do_mpfr_and(int nargs)
{
NODE *t1, *t2, *res;
mpz_ptr pz1, pz2;
int i;
if (nargs < 2)
fatal(_("and: called with less than two arguments"));
t2 = POP_SCALAR();
pz2 = get_intval(t2, nargs, "and");
res = mpg_integer();
for (i = 1; i < nargs; i++) {
t1 = POP_SCALAR();
pz1 = get_intval(t1, nargs - i, "and");
mpz_and(res->mpg_i, pz1, pz2);
free_intval(t1, pz1);
DEREF(t1);
if (i == 1) {
free_intval(t2, pz2);
DEREF(t2);
}
pz2 = res->mpg_i;
}
return res;
}
/* do_mpfr_or --- perform an | operation */
NODE *
do_mpfr_or(int nargs)
{
NODE *t1, *t2, *res;
mpz_ptr pz1, pz2;
int i;
if (nargs < 2)
fatal(_("or: called with less than two arguments"));
t2 = POP_SCALAR();
pz2 = get_intval(t2, nargs, "or");
res = mpg_integer();
for (i = 1; i < nargs; i++) {
t1 = POP_SCALAR();
pz1 = get_intval(t1, nargs - i, "or");
mpz_ior(res->mpg_i, pz1, pz2);
free_intval(t1, pz1);
DEREF(t1);
if (i == 1) {
free_intval(t2, pz2);
DEREF(t2);
}
pz2 = res->mpg_i;
}
return res;
}
/* do_mpfr_xor --- perform an ^ operation */
NODE *
do_mpfr_xor(int nargs)
{
NODE *t1, *t2, *res;
mpz_ptr pz1, pz2;
int i;
if (nargs < 2)
fatal(_("xor: called with less than two arguments"));
t2 = POP_SCALAR();
pz2 = get_intval(t2, nargs, "xor");
res = mpg_integer();
for (i = 1; i < nargs; i++) {
t1 = POP_SCALAR();
pz1 = get_intval(t1, nargs - i, "xor");
mpz_xor(res->mpg_i, pz1, pz2);
free_intval(t1, pz1);
DEREF(t1);
if (i == 1) {
free_intval(t2, pz2);
DEREF(t2);
}
pz2 = res->mpg_i;
}
return res;
}
/* do_mpfr_strtonum --- the strtonum function */
NODE *
do_mpfr_strtonum(int nargs)
{
NODE *tmp, *r;
tmp = fixtype(POP_SCALAR());
if ((tmp->flags & NUMBER) == 0) {
r = mpg_integer(); /* will be changed to MPFR float if necessary in force_mpnum() */
r->stptr = tmp->stptr;
r->stlen = tmp->stlen;
force_mpnum(r, true, use_lc_numeric);
r->stptr = NULL;
r->stlen = 0;
r->wstptr = NULL;
r->wstlen = 0;
} else if (is_mpg_float(tmp)) {
int tval;
r = mpg_float();
tval = mpfr_set(r->mpg_numbr, tmp->mpg_numbr, ROUND_MODE);
IEEE_FMT(r->mpg_numbr, tval);
} else {
r = mpg_integer();
mpz_set(r->mpg_i, tmp->mpg_i);
}
DEREF(tmp);
return r;
}
static bool firstrand = true;
static gmp_randstate_t state;
static mpz_t seed; /* current seed */
/* do_mpfr_rand --- do the rand function */
NODE *
do_mpfr_rand(int nargs ATTRIBUTE_UNUSED)
{
NODE *res;
int tval;
if (firstrand) {
#if 0
/* Choose the default algorithm */
gmp_randinit_default(state);
#endif
/*
* Choose a specific (Mersenne Twister) algorithm in case the default
* changes in the future.
*/
gmp_randinit_mt(state);
mpz_init(seed);
mpz_set_ui(seed, 1);
/* seed state */
gmp_randseed(state, seed);
firstrand = false;
}
res = mpg_float();
tval = mpfr_urandomb(res->mpg_numbr, state);
IEEE_FMT(res->mpg_numbr, tval);
return res;
}
/* do_mpfr_srand --- seed the random number generator */
NODE *
do_mpfr_srand(int nargs)
{
NODE *res;
if (firstrand) {
#if 0
/* Choose the default algorithm */
gmp_randinit_default(state);
#endif
/*
* Choose a specific algorithm (Mersenne Twister) in case default
* changes in the future.
*/
gmp_randinit_mt(state);
mpz_init(seed);
mpz_set_ui(seed, 1);
/* No need to seed state, will change it below */
firstrand = false;
}
res = mpg_integer();
mpz_set(res->mpg_i, seed); /* previous seed */
if (nargs == 0)
mpz_set_ui(seed, (unsigned long) time((time_t *) 0));
else {
NODE *tmp;
tmp = POP_SCALAR();
if (do_lint && (fixtype(tmp)->flags & NUMBER) == 0)
lintwarn(_("srand: received non-numeric argument"));
force_number(tmp);
if (is_mpg_float(tmp))
mpfr_get_z(seed, tmp->mpg_numbr, MPFR_RNDZ);
else /* MP integer */
mpz_set(seed, tmp->mpg_i);
DEREF(tmp);
}
gmp_randseed(state, seed);
return res;
}
#ifdef SUPPLY_INTDIV
/* do_mpfr_intdiv --- do integer division, return quotient and remainder in dest array */
/*
* We define the semantics as:
* numerator = int(numerator)
* denominator = int(denonmator)
* quotient = int(numerator / denomator)
* remainder = int(numerator % denomator)
*/
NODE *
do_mpfr_intdiv(int nargs)
{
NODE *numerator, *denominator, *result;
NODE *num, *denom;
NODE *quotient, *remainder;
NODE *sub, **lhs;
result = POP_PARAM();
if (result->type != Node_var_array)
fatal(_("intdiv: third argument is not an array"));
assoc_clear(result);
denominator = POP_SCALAR();
numerator = POP_SCALAR();
if (do_lint) {
if ((fixtype(numerator)->flags & NUMBER) == 0)
lintwarn(_("intdiv: received non-numeric first argument"));
if ((fixtype(denominator)->flags & NUMBER) == 0)
lintwarn(_("intdiv: received non-numeric second argument"));
}
(void) force_number(numerator);
(void) force_number(denominator);
/* convert numerator and denominator to integer */
if (is_mpg_integer(numerator)) {
num = mpg_integer();
mpz_set(num->mpg_i, numerator->mpg_i);
} else {
if (! mpfr_number_p(numerator->mpg_numbr)) {
/* [+-]inf or NaN */
unref(numerator);
unref(denominator);
return make_number((AWKNUM) -1);
}
num = mpg_integer();
mpfr_get_z(num->mpg_i, numerator->mpg_numbr, MPFR_RNDZ);
}
if (is_mpg_integer(denominator)) {
denom = mpg_integer();
mpz_set(denom->mpg_i, denominator->mpg_i);
} else {
if (! mpfr_number_p(denominator->mpg_numbr)) {
/* [+-]inf or NaN */
unref(numerator);
unref(denominator);
unref(num);
return make_number((AWKNUM) -1);
}
denom = mpg_integer();
mpfr_get_z(denom->mpg_i, denominator->mpg_numbr, MPFR_RNDZ);
}
if (mpz_sgn(denom->mpg_i) == 0)
fatal(_("intdiv: division by zero attempted"));
quotient = mpg_integer();
remainder = mpg_integer();
/* do the division */
mpz_tdiv_qr(quotient->mpg_i, remainder->mpg_i, num->mpg_i, denom->mpg_i);
unref(num);
unref(denom);
unref(numerator);
unref(denominator);
sub = make_string("quotient", 8);
lhs = assoc_lookup(result, sub);
unref(*lhs);
*lhs = quotient;
sub = make_string("remainder", 9);
lhs = assoc_lookup(result, sub);
unref(*lhs);
*lhs = remainder;
return make_number((AWKNUM) 0.0);
}
#endif /* SUPPLY_INTDIV */
/*
* mpg_tofloat --- convert an arbitrary-precision integer operand to
* a float without loss of precision. It is assumed that the
* MPFR variable has already been initialized.
*/
static inline mpfr_ptr
mpg_tofloat(mpfr_ptr mf, mpz_ptr mz)
{
size_t prec;
/*
* When implicitely converting a GMP integer operand to a MPFR float, use
* a precision sufficiently large to hold the converted value exactly.
*
* $ ./gawk -M 'BEGIN { print 13 % 2 }'
* 1
* If the user-specified precision is used to convert the integer 13 to a
* float, one will get:
* $ ./gawk -M 'BEGIN { PREC=2; print 13 % 2.0 }'
* 0
*/
prec = mpz_sizeinbase(mz, 2); /* most significant 1 bit position starting at 1 */
if (prec > PRECISION_MIN) {
prec -= (size_t) mpz_scan1(mz, 0); /* least significant 1 bit index starting at 0 */
if (prec > MPFR_PREC_MAX)
prec = MPFR_PREC_MAX;
else if (prec < PRECISION_MIN)
prec = PRECISION_MIN;
}
else
prec = PRECISION_MIN;
/*
* Always set the precision to avoid hysteresis, since do_mpfr_func
* may copy our precision.
*/
if (prec != mpfr_get_prec(mf))
mpfr_set_prec(mf, prec);
mpfr_set_z(mf, mz, ROUND_MODE);
return mf;
}
/* mpg_add --- add arbitrary-precision numbers */
static NODE *
mpg_add(NODE *t1, NODE *t2)
{
NODE *r;
int tval;
if (is_mpg_integer(t1) && is_mpg_integer(t2)) {
r = mpg_integer();
mpz_add(r->mpg_i, t1->mpg_i, t2->mpg_i);
} else {
r = mpg_float();
if (is_mpg_integer(t2))
tval = mpfr_add_z(r->mpg_numbr, t1->mpg_numbr, t2->mpg_i, ROUND_MODE);
else if (is_mpg_integer(t1))
tval = mpfr_add_z(r->mpg_numbr, t2->mpg_numbr, t1->mpg_i, ROUND_MODE);
else
tval = mpfr_add(r->mpg_numbr, t1->mpg_numbr, t2->mpg_numbr, ROUND_MODE);
IEEE_FMT(r->mpg_numbr, tval);
}
return r;
}
/* mpg_sub --- subtract arbitrary-precision numbers */
static NODE *
mpg_sub(NODE *t1, NODE *t2)
{
NODE *r;
int tval;
if (is_mpg_integer(t1) && is_mpg_integer(t2)) {
r = mpg_integer();
mpz_sub(r->mpg_i, t1->mpg_i, t2->mpg_i);
} else {
r = mpg_float();
if (is_mpg_integer(t2))
tval = mpfr_sub_z(r->mpg_numbr, t1->mpg_numbr, t2->mpg_i, ROUND_MODE);
else if (is_mpg_integer(t1)) {
#if (!defined(MPFR_VERSION) || (MPFR_VERSION < MPFR_VERSION_NUM(3,1,0)))
NODE *tmp = t1;
t1 = t2;
t2 = tmp;
tval = mpfr_sub_z(r->mpg_numbr, t1->mpg_numbr, t2->mpg_i, ROUND_MODE);
tval = mpfr_neg(r->mpg_numbr, r->mpg_numbr, ROUND_MODE);
t2 = t1;
t1 = tmp;
#else
tval = mpfr_z_sub(r->mpg_numbr, t1->mpg_i, t2->mpg_numbr, ROUND_MODE);
#endif
} else
tval = mpfr_sub(r->mpg_numbr, t1->mpg_numbr, t2->mpg_numbr, ROUND_MODE);
IEEE_FMT(r->mpg_numbr, tval);
}
return r;
}
/* mpg_mul --- multiply arbitrary-precision numbers */
static NODE *
mpg_mul(NODE *t1, NODE *t2)
{
NODE *r;
int tval;
if (is_mpg_integer(t1) && is_mpg_integer(t2)) {
r = mpg_integer();
mpz_mul(r->mpg_i, t1->mpg_i, t2->mpg_i);
} else {
r = mpg_float();
if (is_mpg_integer(t2))
tval = mpfr_mul_z(r->mpg_numbr, t1->mpg_numbr, t2->mpg_i, ROUND_MODE);
else if (is_mpg_integer(t1))
tval = mpfr_mul_z(r->mpg_numbr, t2->mpg_numbr, t1->mpg_i, ROUND_MODE);
else
tval = mpfr_mul(r->mpg_numbr, t1->mpg_numbr, t2->mpg_numbr, ROUND_MODE);
IEEE_FMT(r->mpg_numbr, tval);
}
return r;
}
/* mpg_pow --- exponentiation involving arbitrary-precision numbers */
static NODE *
mpg_pow(NODE *t1, NODE *t2)
{
NODE *r;
int tval;
if (is_mpg_integer(t1) && is_mpg_integer(t2)) {
if (mpz_sgn(t2->mpg_i) >= 0 && mpz_fits_ulong_p(t2->mpg_i)) {
r = mpg_integer();
mpz_pow_ui(r->mpg_i, t1->mpg_i, mpz_get_ui(t2->mpg_i));
} else {
mpfr_ptr p1, p2;
p1 = MP_FLOAT(t1);
p2 = MP_FLOAT(t2);
r = mpg_float();
tval = mpfr_pow(r->mpg_numbr, p1, p2, ROUND_MODE);
IEEE_FMT(r->mpg_numbr, tval);
}
} else {
r = mpg_float();
if (is_mpg_integer(t2))
tval = mpfr_pow_z(r->mpg_numbr, t1->mpg_numbr, t2->mpg_i, ROUND_MODE);
else {
mpfr_ptr p1;
p1 = MP_FLOAT(t1);
tval = mpfr_pow(r->mpg_numbr, p1, t2->mpg_numbr, ROUND_MODE);
}
IEEE_FMT(r->mpg_numbr, tval);
}
return r;
}
/* mpg_div --- arbitrary-precision division */
static NODE *
mpg_div(NODE *t1, NODE *t2)
{
NODE *r;
int tval;
if (is_mpg_integer(t1) && is_mpg_integer(t2)
&& (mpz_sgn(t2->mpg_i) != 0) /* not dividing by 0 */
&& mpz_divisible_p(t1->mpg_i, t2->mpg_i)
) {
r = mpg_integer();
mpz_divexact(r->mpg_i, t1->mpg_i, t2->mpg_i);
} else {
mpfr_ptr p1, p2;
p1 = MP_FLOAT(t1);
p2 = MP_FLOAT(t2);
r = mpg_float();
tval = mpfr_div(r->mpg_numbr, p1, p2, ROUND_MODE);
IEEE_FMT(r->mpg_numbr, tval);
}
return r;
}
/* mpg_mod --- modulus operation with arbitrary-precision numbers */
static NODE *
mpg_mod(NODE *t1, NODE *t2)
{
NODE *r;
int tval;
if (is_mpg_integer(t1) && is_mpg_integer(t2)) {
/*
* 8/2014: Originally, this was just
*
* r = mpg_integer();
* mpz_mod(r->mpg_i, t1->mpg_i, t2->mpg_i);
*
* But that gave very strange results with negative numerator:
*
* $ ./gawk -M 'BEGIN { print -15 % 7 }'
* 6
*
* So instead we use mpz_tdiv_qr() to get the correct result
* and just throw away the quotient. We could not find any
* reason why mpz_mod() wasn't working correctly.
*/
NODE *dummy_quotient;
r = mpg_integer();
dummy_quotient = mpg_integer();
mpz_tdiv_qr(dummy_quotient->mpg_i, r->mpg_i, t1->mpg_i, t2->mpg_i);
unref(dummy_quotient);
} else {
mpfr_ptr p1, p2;
p1 = MP_FLOAT(t1);
p2 = MP_FLOAT(t2);
r = mpg_float();
tval = mpfr_fmod(r->mpg_numbr, p1, p2, ROUND_MODE);
IEEE_FMT(r->mpg_numbr, tval);
}
return r;
}
/*
* mpg_interpret --- pre-exec hook in the interpreter. Handles
* arithmetic operations with MPFR/GMP numbers.
*/
static int
mpg_interpret(INSTRUCTION **cp)
{
INSTRUCTION *pc = *cp; /* current instruction */
OPCODE op; /* current opcode */
NODE *r = NULL;
NODE *t1, *t2;
NODE **lhs;
int tval; /* the ternary value returned by a MPFR function */
switch ((op = pc->opcode)) {
case Op_plus_i:
t2 = force_number(pc->memory);
goto plus;
case Op_plus:
t2 = POP_NUMBER();
plus:
t1 = TOP_NUMBER();
r = mpg_add(t1, t2);
DEREF(t1);
if (op == Op_plus)
DEREF(t2);
REPLACE(r);
break;
case Op_minus_i:
t2 = force_number(pc->memory);
goto minus;
case Op_minus:
t2 = POP_NUMBER();
minus:
t1 = TOP_NUMBER();
r = mpg_sub(t1, t2);
DEREF(t1);
if (op == Op_minus)
DEREF(t2);
REPLACE(r);
break;
case Op_times_i:
t2 = force_number(pc->memory);
goto times;
case Op_times:
t2 = POP_NUMBER();
times:
t1 = TOP_NUMBER();
r = mpg_mul(t1, t2);
DEREF(t1);
if (op == Op_times)
DEREF(t2);
REPLACE(r);
break;
case Op_exp_i:
t2 = force_number(pc->memory);
goto exp;
case Op_exp:
t2 = POP_NUMBER();
exp:
t1 = TOP_NUMBER();
r = mpg_pow(t1, t2);
DEREF(t1);
if (op == Op_exp)
DEREF(t2);
REPLACE(r);
break;
case Op_quotient_i:
t2 = force_number(pc->memory);
goto quotient;
case Op_quotient:
t2 = POP_NUMBER();
quotient:
t1 = TOP_NUMBER();
r = mpg_div(t1, t2);
DEREF(t1);
if (op == Op_quotient)
DEREF(t2);
REPLACE(r);
break;
case Op_mod_i:
t2 = force_number(pc->memory);
goto mod;
case Op_mod:
t2 = POP_NUMBER();
mod:
t1 = TOP_NUMBER();
r = mpg_mod(t1, t2);
DEREF(t1);
if (op == Op_mod)
DEREF(t2);
REPLACE(r);
break;
case Op_preincrement:
case Op_predecrement:
lhs = TOP_ADDRESS();
t1 = *lhs;
force_number(t1);
if (is_mpg_integer(t1)) {
if (t1->valref == 1 && t1->flags == (MALLOC|MPZN|NUMCUR|NUMBER))
/* Efficiency hack. Big speed-up (> 30%) in a tight loop */
r = t1;
else
r = *lhs = mpg_integer();
if (op == Op_preincrement)
mpz_add_ui(r->mpg_i, t1->mpg_i, 1);
else
mpz_sub_ui(r->mpg_i, t1->mpg_i, 1);
} else {
/*
* An optimization like the one above is not going to work
* for a floating-point number. With it,
* gawk -M 'BEGIN { PREC=53; i=2^53+0.0; PREC=113; ++i; print i}'
* will output 2^53 instead of 2^53+1.
*/
r = *lhs = mpg_float();
tval = mpfr_add_si(r->mpg_numbr, t1->mpg_numbr,
op == Op_preincrement ? 1 : -1,
ROUND_MODE);
IEEE_FMT(r->mpg_numbr, tval);
}
if (r != t1)
unref(t1);
UPREF(r);
REPLACE(r);
break;
case Op_postincrement:
case Op_postdecrement:
lhs = TOP_ADDRESS();
t1 = *lhs;
force_number(t1);
if (is_mpg_integer(t1)) {
r = mpg_integer();
mpz_set(r->mpg_i, t1->mpg_i);
if (t1->valref == 1 && t1->flags == (MALLOC|MPZN|NUMCUR|NUMBER))
/* Efficiency hack. Big speed-up (> 30%) in a tight loop */
t2 = t1;
else
t2 = *lhs = mpg_integer();
if (op == Op_postincrement)
mpz_add_ui(t2->mpg_i, t1->mpg_i, 1);
else
mpz_sub_ui(t2->mpg_i, t1->mpg_i, 1);
} else {
r = mpg_float();
tval = mpfr_set(r->mpg_numbr, t1->mpg_numbr, ROUND_MODE);
IEEE_FMT(r->mpg_numbr, tval);
t2 = *lhs = mpg_float();
tval = mpfr_add_si(t2->mpg_numbr, t1->mpg_numbr,
op == Op_postincrement ? 1 : -1,
ROUND_MODE);
IEEE_FMT(t2->mpg_numbr, tval);
}
if (t2 != t1)
unref(t1);
REPLACE(r);
break;
case Op_unary_minus:
t1 = TOP_NUMBER();
if (is_mpg_float(t1)) {
r = mpg_float();
tval = mpfr_neg(r->mpg_numbr, t1->mpg_numbr, ROUND_MODE);
IEEE_FMT(r->mpg_numbr, tval);
} else {
r = mpg_integer();
mpz_neg(r->mpg_i, t1->mpg_i);
}
DEREF(t1);
REPLACE(r);
break;
case Op_unary_plus:
t1 = TOP_NUMBER();
if (is_mpg_float(t1)) {
r = mpg_float();
tval = mpfr_set(r->mpg_numbr, t1->mpg_numbr, ROUND_MODE);
IEEE_FMT(r->mpg_numbr, tval);
} else {
r = mpg_integer();
mpz_set(r->mpg_i, t1->mpg_i);
}
DEREF(t1);
REPLACE(r);
break;
case Op_assign_plus:
case Op_assign_minus:
case Op_assign_times:
case Op_assign_quotient:
case Op_assign_mod:
case Op_assign_exp:
lhs = POP_ADDRESS();
t1 = *lhs;
force_number(t1);
t2 = TOP_NUMBER();
switch (op) {
case Op_assign_plus:
r = mpg_add(t1, t2);
break;
case Op_assign_minus:
r = mpg_sub(t1, t2);
break;
case Op_assign_times:
r = mpg_mul(t1, t2);
break;
case Op_assign_quotient:
r = mpg_div(t1, t2);
break;
case Op_assign_mod:
r = mpg_mod(t1, t2);
break;
case Op_assign_exp:
r = mpg_pow(t1, t2);
break;
default:
cant_happen();
}
DEREF(t2);
unref(*lhs);
*lhs = r;
UPREF(r);
REPLACE(r);
break;
default:
return true; /* unhandled */
}
*cp = pc->nexti; /* next instruction to execute */
return false;
}
/* mpg_fmt --- output formatted string with special MPFR/GMP conversion specifiers */
const char *
mpg_fmt(const char *mesg, ...)
{
static char *tmp = NULL;
int ret;
va_list args;
if (tmp != NULL) {
mpfr_free_str(tmp);
tmp = NULL;
}
va_start(args, mesg);
ret = mpfr_vasprintf(& tmp, mesg, args);
va_end(args);
if (ret >= 0 && tmp != NULL)
return tmp;
return mesg;
}
/* mpfr_unset --- clear out the MPFR values */
void
mpfr_unset(NODE *n)
{
if (is_mpg_float(n))
mpfr_clear(n->mpg_numbr);
else if (is_mpg_integer(n))
mpz_clear(n->mpg_i);
}
#else
void
set_PREC()
{
/* dummy function */
}
void
set_ROUNDMODE()
{
/* dummy function */
}
void
mpfr_unset(NODE *n)
{
/* dummy function */
}
#endif