Imported gcc-4.4.3

[msp430-gcc.git] / gmp / mpbsd / xtom.c

diff --git a/gmp/mpbsd/xtom.c b/gmp/mpbsd/xtom.c
new file mode 100644 (file)
index 0000000..fe41865
--- /dev/null
+++ b/gmp/mpbsd/xtom.c
@@ -0,0 +1,88 @@
+/* xtom -- convert a hexadecimal string to a MINT, and return a pointer to
+   the MINT.
+
+Copyright 1991, 1994, 1995, 1996, 2000, 2001, 2002, 2005 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 Lesser General Public License as published by
+the Free Software Foundation; either version 3 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 Lesser General Public
+License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with the GNU MP Library.  If not, see http://www.gnu.org/licenses/.  */
+
+#include <string.h>
+#include <ctype.h>
+#include "mp.h"
+#include "gmp.h"
+#include "gmp-impl.h"
+
+extern const unsigned char __gmp_digit_value_tab[];
+#define digit_value __gmp_digit_value_tab
+
+MINT *
+xtom (const char *str)
+{
+  size_t str_size;
+  char *s, *begs;
+  size_t i;
+  mp_size_t xsize;
+  int c;
+  int negative;
+  MINT *x = (MINT *) (*__gmp_allocate_func) (sizeof (MINT));
+  TMP_DECL;
+
+  /* Skip whitespace.  */
+  do
+    c = (unsigned char) *str++;
+  while (isspace (c));
+
+  negative = 0;
+  if (c == '-')
+    {
+      negative = 1;
+      c = (unsigned char) *str++;
+    }
+
+  if (digit_value[c] >= 16)
+    return 0;                  /* error if no digits */
+
+  TMP_MARK;
+  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[c];
+         if (dig >= 16)
+           {
+             TMP_FREE;
+             return 0;
+           }
+         *s++ = dig;
+       }
+      c = (unsigned char) *str++;
+    }
+
+  str_size = s - begs;
+
+  xsize = str_size / __mp_bases[16].chars_per_limb + 1;
+  x->_mp_alloc = xsize;
+  x->_mp_d = (mp_ptr) (*__gmp_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;
+  return x;
+}