Problems with mpz_set_str and huge strings

[Torbjorn Granlund]

  > I think your operands should be made to work, since they actually can be
  > made to fit into memory.
  
  It appears to be an overflow in mpz/set_str.c, where xsize is ultimately
  negative (printf inserted by me):
  
  Breakpoint 3, __gmpz_set_str (x=0xffe034ec, str=0xf7d6d2c2 "", base=10) at set_str.c:126
  126     printf("str_size: %u  __mp_bases[]: %f  numb_bits+2: %d\n",
  (gdb) n
  str_size: 677741241  __mp_bases[]: 0.301030  numb_bits+2: 34
  129       xsize = (((mp_size_t) (str_size / __mp_bases[base].chars_per_bit_exactly))
  (gdb) p 677741241 / 0.301030
  $1 = 2251407637.1125803
  (gdb) p (long) (677741241 / 0.301030)
  $2 = -2043559659
  (gdb) n
  131       MPZ_REALLOC (x, xsize);
  (gdb) p xsize
  $3 = -67108862
  
Thanks!  I changed the code there, and in 3 more places with similar
code.  The new code should not overflow, I think.
  
The code is available here: http://shell.gmplib.org:8000/gmp-4.3/  

-- 
Torbjörn