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-rw-r--r--gnu/lib/libgmp/mpz_inp_raw.c72
1 files changed, 72 insertions, 0 deletions
diff --git a/gnu/lib/libgmp/mpz_inp_raw.c b/gnu/lib/libgmp/mpz_inp_raw.c
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+++ b/gnu/lib/libgmp/mpz_inp_raw.c
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+/* mpz_inp_raw -- Input a MP_INT in raw, but endianess, and wordsize
+ independent format (as output by mpz_out_raw).
+
+Copyright (C) 1991, 1992 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 General Public License as published by
+the Free Software Foundation; either version 2, 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 General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with the GNU MP Library; see the file COPYING. If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include <stdio.h>
+
+#include "gmp.h"
+#include "gmp-impl.h"
+
+void
+#ifdef __STDC__
+mpz_inp_raw (MP_INT *x, FILE *file)
+#else
+mpz_inp_raw (x, file)
+ MP_INT *x;
+ FILE *file;
+#endif
+{
+ int i;
+ mp_size s;
+ mp_size xsize;
+ mp_ptr xp;
+ unsigned int c;
+ mp_limb x_digit;
+ mp_size x_index;
+
+ xsize = 0;
+ for (i = 4 - 1; i >= 0; i--)
+ {
+ c = fgetc (file);
+ xsize = (xsize << BITS_PER_CHAR) | c;
+ }
+
+ /* ??? Sign extend xsize for non-32 bit machines? */
+
+ x_index = (ABS (xsize) + BYTES_PER_MP_LIMB - 1) / BYTES_PER_MP_LIMB - 1;
+
+ if (x->alloc < x_index)
+ _mpz_realloc (x, x_index);
+
+ xp = x->d;
+ x->size = xsize / BYTES_PER_MP_LIMB;
+ x_digit = 0;
+ for (s = ABS (xsize) - 1; s >= 0; s--)
+ {
+ i = s % BYTES_PER_MP_LIMB;
+ c = fgetc (file);
+ x_digit = (x_digit << BITS_PER_CHAR) | c;
+ if (i == 0)
+ {
+ xp[x_index--] = x_digit;
+ x_digit = 0;
+ }
+ }
+}
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