source: patches/mpfr-3.1.5-fixes-1.patch@ a26563e

mpfr-3.1.5

@@ +1 @@
+strtofr
+vasprintf

mpfr-3.1.5

@@ -1 @@
-3.1.5
+3.1.5-p2

src/mpfr.h

@@ -27 +27 @@
 #define MPFR_VERSION_MAJOR 3
 #define MPFR_VERSION_MINOR 1
 #define MPFR_VERSION_PATCHLEVEL 5
-#define MPFR_VERSION_STRING "3.1.5"
+#define MPFR_VERSION_STRING "3.1.5-p2"
 
 /* Macros dealing with MPFR VERSION */
 #define MPFR_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))

src/strtofr.c

@@ -743 +743 @@
          of the pstr_size most significant digits of pstr->mant, with
          equality in case exact is non-zero. */
 
-      /* test if rounding is possible, and if so exit the loop */
-      if (exact || mpfr_can_round_raw (result, ysize,
-                                       (pstr->negative) ? -1 : 1,
-                                       ysize_bits - err - 1,
-                                       MPFR_RNDN, rnd, MPFR_PREC(x)))
+      /* test if rounding is possible, and if so exit the loop.
+         Note: we also need to be able to determine the correct ternary value,
+         thus we use the MPFR_PREC(x) + (rnd == MPFR_RNDN) trick.
+         For example if result = xxx...xxx111...111 and rnd = RNDN,
+         then we know the correct rounding is xxx...xx(x+1), but we cannot know
+         the correct ternary value. */
+      if (exact || mpfr_round_p (result, ysize, ysize_bits - err - 1,
+                                 MPFR_PREC(x) + (rnd == MPFR_RNDN)))
         break;
 
     next_loop:

src/vasprintf.c

@@ -1593 +1593 @@
         }
       else if (spec.spec == 'f' || spec.spec == 'F')
         {
-          if (spec.prec == -1)
+          if (spec.prec < 0)
             spec.prec = 6;
           if (regular_fg (np, p, spec, NULL) == -1)
             goto error;

src/version.c

@@ -25 +25 @@
 const char *
 mpfr_get_version (void)
 {
-  return "3.1.5";
+  return "3.1.5-p2";
 }

tests/tsprintf.c

@@ -1251 +1251 @@
   check_emin_aux (MPFR_EMIN_MIN);
 }
 
+static void
+test20161214 (void)
+{
+  mpfr_t x;
+  char buf[32];
+  const char s[] = "0x0.fffffffffffff8p+1024";
+  int r;
+
+  mpfr_init2 (x, 64);
+  mpfr_set_str (x, s, 16, MPFR_RNDN);
+  r = mpfr_snprintf (buf, 32, "%.*RDf", -2, x);
+  MPFR_ASSERTN(r == 316);
+  r = mpfr_snprintf (buf, 32, "%.*RDf", INT_MIN + 1, x);
+  MPFR_ASSERTN(r == 316);
+  r = mpfr_snprintf (buf, 32, "%.*RDf", INT_MIN, x);
+  MPFR_ASSERTN(r == 316);
+  mpfr_clear (x);
+}
+
 int
 main (int argc, char **argv)
 {
@@ -1271 +1290 @@
   mixed ();
   check_emax ();
   check_emin ();
+  test20161214 ();
 
 #if defined(HAVE_LOCALE_H) && defined(HAVE_SETLOCALE)
 #if MPFR_LCONV_DPTS

tests/tstrtofr.c

@@ -1191 +1191 @@
   mpfr_clears (e, x1, x2, (mpfr_ptr) 0);
 }
 
+/* Note: the number is 5^47/2^9. */
+static void
+bug20161217 (void)
+{
+  mpfr_t fp, z;
+  static const char * num = "0.1387778780781445675529539585113525390625e31";
+  int inex;
+
+  mpfr_init2 (fp, 110);
+  mpfr_init2 (z, 110);
+  inex = mpfr_strtofr (fp, num, NULL, 10, MPFR_RNDN);
+  MPFR_ASSERTN(inex == 0);
+  mpfr_set_str_binary (z, "10001100001000010011110110011101101001010000001011011110010001010100010100100110111101000010001011001100001101E-9");
+  MPFR_ASSERTN(mpfr_equal_p (fp, z));
+  mpfr_clear (fp);
+  mpfr_clear (z);
+}
+
 int
 main (int argc, char *argv[])
 {
@@ -1205 +1223 @@
   test20100310 ();
   bug20120814 ();
   bug20120829 ();
+  bug20161217 ();
 
   tests_end_mpfr ();
   return 0;