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-rw-r--r--stdio-common/_i18n_itowa.c267
1 files changed, 267 insertions, 0 deletions
diff --git a/stdio-common/_i18n_itowa.c b/stdio-common/_i18n_itowa.c
new file mode 100644
index 0000000000..357f8a383b
--- /dev/null
+++ b/stdio-common/_i18n_itowa.c
@@ -0,0 +1,267 @@
+/* Internal function for converting integers to string using locale
+   specific digits.
+   Copyright (C) 2000 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 2000.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <gmp-mparam.h>
+#include <stdlib/gmp.h>
+#include <stdlib/gmp-impl.h>
+#include <stdlib/longlong.h>
+
+#include "_i18n_itowa.h"
+
+
+/* Canonize environment.  For some architectures not all values might
+   be defined in the GMP header files.  */
+#ifndef UMUL_TIME
+# define UMUL_TIME 1
+#endif
+#ifndef UDIV_TIME
+# define UDIV_TIME 3
+#endif
+
+/* Control memory layout.  */
+#ifdef PACK
+# undef PACK
+# define PACK __attribute__ ((packed))
+#else
+# define PACK
+#endif
+
+
+/* Declare local types.  */
+struct base_table_t
+{
+#if (UDIV_TIME > 2 * UMUL_TIME)
+  mp_limb_t base_multiplier;
+#endif
+  char flag;
+  char post_shift;
+#if BITS_PER_MP_LIMB == 32
+  struct
+    {
+      char normalization_steps;
+      char ndigits;
+      mp_limb_t base PACK;
+#if UDIV_TIME > 2 * UMUL_TIME
+      mp_limb_t base_ninv PACK;
+#endif
+    } big;
+#endif
+};
+
+
+/* Variable in other file.  */
+extern const struct base_table_t _itoa_base_table[];
+
+
+wchar_t *
+_i18n_itowa (value, buflim)
+     unsigned long long int value;
+     wchar_t *buflim;
+{
+  const struct base_table_t *brec = &_itoa_base_table[8];
+
+#if BITS_PER_MP_LIMB == 64
+  mp_limb_t base_multiplier = brec->base_multiplier;
+  if (brec->flag)    while (value != 0)
+      {
+	mp_limb_t quo, rem, x, dummy;
+
+	umul_ppmm (x, dummy, value, base_multiplier);
+	quo = (x + ((value - x) >> 1)) >> (brec->post_shift - 1);
+	rem = value - quo * 10;
+	*--buflim = outdigitwc_value (rem);
+	value = quo;
+      }
+  else
+    while (value != 0)
+      {
+	mp_limb_t quo, rem, x, dummy;
+
+	umul_ppmm (x, dummy, value, base_multiplier);
+	quo = x >> brec->post_shift;
+	rem = value - quo * 10;
+	*--buflim = outdigitwc_value (rem);
+	value = quo;
+      }
+#endif
+#if BITS_PER_MP_LIMB == 32
+  mp_limb_t t[3];
+  int n;
+
+  /* First convert x0 to 1-3 words in base s->big.base.
+     Optimize for frequent cases of 32 bit numbers.  */
+  if ((mp_limb_t) (value >> 32) >= 1)
+    {
+#if UDIV_TIME > 2 * UMUL_TIME || UDIV_NEEDS_NORMALIZATION
+      int big_normalization_steps = brec->big.normalization_steps;
+      mp_limb_t big_base_norm
+	= brec->big.base << big_normalization_steps;
+#endif
+      if ((mp_limb_t) (value >> 32) >= brec->big.base)
+	{
+	  mp_limb_t x1hi, x1lo, r;
+	  /* If you want to optimize this, take advantage of
+	     that the quotient in the first udiv_qrnnd will
+	     always be very small.  It might be faster just to
+	     subtract in a tight loop.  */
+
+#if UDIV_TIME > 2 * UMUL_TIME
+	  mp_limb_t x, xh, xl;
+
+	  if (big_normalization_steps == 0)
+	    xh = 0;
+	  else
+	    xh = (mp_limb_t) (value >> (64 - big_normalization_steps));
+	  xl = (mp_limb_t) (value >> (32 - big_normalization_steps));
+	  udiv_qrnnd_preinv (x1hi, r, xh, xl, big_base_norm,
+			     brec->big.base_ninv);
+
+	  xl = ((mp_limb_t) value) << big_normalization_steps;
+	  udiv_qrnnd_preinv (x1lo, x, r, xl, big_base_norm,
+			     brec->big.base_ninv);
+	  t[2] = x >> big_normalization_steps;
+
+	  if (big_normalization_steps == 0)
+	    xh = x1hi;
+	  else
+	    xh = ((x1hi << big_normalization_steps)
+		  | (x1lo >> (32 - big_normalization_steps)));
+	  xl = x1lo << big_normalization_steps;
+	  udiv_qrnnd_preinv (t[0], x, xh, xl, big_base_norm,
+			     brec->big.base_ninv);
+	  t[1] = x >> big_normalization_steps;
+#elif UDIV_NEEDS_NORMALIZATION
+	  mp_limb_t x, xh, xl;
+
+	  if (big_normalization_steps == 0)
+	    xh = 0;
+	  else
+	    xh = (mp_limb_t) (value >> 64 - big_normalization_steps);
+	  xl = (mp_limb_t) (value >> 32 - big_normalization_steps);
+	  udiv_qrnnd (x1hi, r, xh, xl, big_base_norm);
+
+	  xl = ((mp_limb_t) value) << big_normalization_steps;
+	  udiv_qrnnd (x1lo, x, r, xl, big_base_norm);
+	  t[2] = x >> big_normalization_steps;
+
+	  if (big_normalization_steps == 0)
+	    xh = x1hi;
+	  else
+	    xh = ((x1hi << big_normalization_steps)
+		  | (x1lo >> 32 - big_normalization_steps));
+	  xl = x1lo << big_normalization_steps;
+	  udiv_qrnnd (t[0], x, xh, xl, big_base_norm);
+	  t[1] = x >> big_normalization_steps;
+#else
+	  udiv_qrnnd (x1hi, r, 0, (mp_limb_t) (value >> 32),
+		      brec->big.base);
+	  udiv_qrnnd (x1lo, t[2], r, (mp_limb_t) value, brec->big.base);
+	  udiv_qrnnd (t[0], t[1], x1hi, x1lo, brec->big.base);
+#endif
+	  n = 3;
+	}
+      else
+	{
+#if (UDIV_TIME > 2 * UMUL_TIME)
+	  mp_limb_t x;
+
+	  value <<= brec->big.normalization_steps;
+	  udiv_qrnnd_preinv (t[0], x, (mp_limb_t) (value >> 32),
+			     (mp_limb_t) value, big_base_norm,
+			     brec->big.base_ninv);
+	  t[1] = x >> brec->big.normalization_steps;
+#elif UDIV_NEEDS_NORMALIZATION
+	  mp_limb_t x;
+
+	  value <<= big_normalization_steps;
+	  udiv_qrnnd (t[0], x, (mp_limb_t) (value >> 32),
+		      (mp_limb_t) value, big_base_norm);
+	  t[1] = x >> big_normalization_steps;
+#else
+	  udiv_qrnnd (t[0], t[1], (mp_limb_t) (value >> 32),
+		      (mp_limb_t) value, brec->big.base);
+#endif
+	  n = 2;
+	}
+    }
+  else
+    {
+      t[0] = value;
+      n = 1;
+    }
+
+  /* Convert the 1-3 words in t[], word by word, to ASCII.  */
+  do
+    {
+      mp_limb_t ti = t[--n];
+      int ndig_for_this_limb = 0;
+
+#if UDIV_TIME > 2 * UMUL_TIME
+      mp_limb_t base_multiplier = brec->base_multiplier;
+      if (brec->flag)
+	while (ti != 0)
+	  {
+	    mp_limb_t quo, rem, x, dummy;
+
+	    umul_ppmm (x, dummy, ti, base_multiplier);
+	    quo = (x + ((ti - x) >> 1)) >> (brec->post_shift - 1);
+	    rem = ti - quo * 10;
+	    *--buflim = outdigitwc_value (rem);
+	    ti = quo;
+	    ++ndig_for_this_limb;
+	  }
+      else
+	while (ti != 0)
+	  {
+	    mp_limb_t quo, rem, x, dummy;
+
+	    umul_ppmm (x, dummy, ti, base_multiplier);
+	    quo = x >> brec->post_shift;
+	    rem = ti - quo * 10;
+	    *--buflim = outdigitwc_value (rem);
+	    ti = quo;
+	    ++ndig_for_this_limb;
+	  }
+#else
+      while (ti != 0)
+	{
+	  mp_limb_t quo, rem;
+
+	  quo = ti / 10;
+	  rem = ti % 10;
+	  *--buflim = outdigitwc_value (rem);
+	  ti = quo;
+	  ++ndig_for_this_limb;
+	}
+#endif
+      /* If this wasn't the most significant word, pad with zeros.  */
+      if (n != 0)
+	while (ndig_for_this_limb < brec->big.ndigits)
+	  {
+	    *--buflim = '0';
+	    ++ndig_for_this_limb;
+	  }
+    }
+  while (n != 0);
+#endif
+
+  return buflim;
+}
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