1 files changed, 110 insertions, 0 deletions
diff --git a/gnu/lib/libgmp/mpbsd/xtom.c b/gnu/lib/libgmp/mpbsd/xtom.c
new file mode 100644
index 00000000000..5a529e8e46e
--- /dev/null
+++ b/gnu/lib/libgmp/mpbsd/xtom.c
@@ -0,0 +1,110 @@
+/* xtom -- convert a hexadecimal string to a MINT, and return a pointer to
+   the MINT.
+
+Copyright (C) 1991, 1994, 1995 Free Software Foundation, Inc.
+
+This file is part of the GNU MP Library.
+
+The GNU MP 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 MP 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 MP 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 "mp.h"
+#include "gmp.h"
+#include "gmp-impl.h"
+
+static int
+digit_value_in_base (c, base)
+     int c;
+     int base;
+{
+  int digit;
+
+  if (isdigit (c))
+    digit = c - '0';
+  else if (islower (c))
+    digit = c - 'a' + 10;
+  else if (isupper (c))
+    digit = c - 'A' + 10;
+  else
+    return -1;
+
+  if (digit < base)
+    return digit;
+  return -1;
+}
+
+MINT *
+#if __STDC__
+xtom (const char *str)
+#else
+xtom (str)
+     const char *str;
+#endif
+{
+  size_t str_size;
+  char *s, *begs;
+  size_t i;
+  mp_size_t xsize;
+  int c;
+  int negative;
+  MINT *x = (MINT *) (*_mp_allocate_func) (sizeof (MINT));
+  TMP_DECL (marker);
+
+  /* Skip whitespace.  */
+  do
+    c = *str++;
+  while (isspace (c));
+
+  negative = 0;
+  if (c == '-')
+    {
+      negative = 1;
+      c = *str++;
+    }
+
+  if (digit_value_in_base (c, 16) < 0)
+    return 0;			/* error if no digits */
+
+  TMP_MARK (marker);
+  str_size = strlen (str - 1);
+  s = begs = (char *) TMP_ALLOC (str_size + 1);
+
+  for (i = 0; i < str_size; i++)
+    {
+      if (!isspace (c))
+	{
+	  int dig = digit_value_in_base (c, 16);
+	  if (dig < 0)
+	    {
+	      TMP_FREE (marker);
+	      return 0;
+	    }
+	  *s++ = dig;
+	}
+      c = *str++;
+    }
+
+  str_size = s - begs;
+
+  xsize = str_size / __mp_bases[16].chars_per_limb + 1;
+  x->_mp_alloc = xsize;
+  x->_mp_d = (mp_ptr) (*_mp_allocate_func) (xsize * BYTES_PER_MP_LIMB);
+
+  xsize = mpn_set_str (x->_mp_d, (unsigned char *) begs, str_size, 16);
+  x->_mp_size = negative ? -xsize : xsize;
+
+  TMP_FREE (marker);
+  return x;
+}