#
source:
trunk/third/gmp/mpz/out_str.c
@
18191

Revision 18191, 2.5 KB checked in by ghudson, 22 years ago (diff) |
---|

Line | |
---|---|

1 | /* mpz_out_str(stream, base, integer) -- Output to STREAM the multi prec. |

2 | integer INTEGER in base BASE. |

3 | |

4 | Copyright 1991, 1993, 1994, 1996, 2001 Free Software Foundation, Inc. |

5 | |

6 | This file is part of the GNU MP Library. |

7 | |

8 | The GNU MP Library is free software; you can redistribute it and/or modify |

9 | it under the terms of the GNU Lesser General Public License as published by |

10 | the Free Software Foundation; either version 2.1 of the License, or (at your |

11 | option) any later version. |

12 | |

13 | The GNU MP Library is distributed in the hope that it will be useful, but |

14 | WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |

15 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public |

16 | License for more details. |

17 | |

18 | You should have received a copy of the GNU Lesser General Public License |

19 | along with the GNU MP Library; see the file COPYING.LIB. If not, write to |

20 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |

21 | MA 02111-1307, USA. */ |

22 | |

23 | #include <stdio.h> |

24 | #include "gmp.h" |

25 | #include "gmp-impl.h" |

26 | |

27 | size_t |

28 | mpz_out_str (FILE *stream, int base, mpz_srcptr x) |

29 | { |

30 | mp_ptr xp; |

31 | mp_size_t x_size = x->_mp_size; |

32 | unsigned char *str; |

33 | size_t str_size; |

34 | size_t i; |

35 | size_t written; |

36 | char *num_to_text; |

37 | TMP_DECL (marker); |

38 | |

39 | if (stream == 0) |

40 | stream = stdout; |

41 | |

42 | if (base >= 0) |

43 | { |

44 | if (base == 0) |

45 | base = 10; |

46 | num_to_text = "0123456789abcdefghijklmnopqrstuvwxyz"; |

47 | } |

48 | else |

49 | { |

50 | base = -base; |

51 | num_to_text = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"; |

52 | } |

53 | |

54 | if (x_size == 0) |

55 | { |

56 | fputc ('0', stream); |

57 | return ferror (stream) ? 0 : 1; |

58 | } |

59 | |

60 | written = 0; |

61 | |

62 | if (x_size < 0) |

63 | { |

64 | fputc ('-', stream); |

65 | x_size = -x_size; |

66 | written = 1; |

67 | } |

68 | |

69 | TMP_MARK (marker); |

70 | str_size = ((size_t) (x_size * BITS_PER_MP_LIMB |

71 | * __mp_bases[base].chars_per_bit_exactly)) + 3; |

72 | str = (unsigned char *) TMP_ALLOC (str_size); |

73 | |

74 | /* Move the number to convert into temporary space, since mpn_get_str |

75 | clobbers its argument + needs one extra high limb.... */ |

76 | xp = (mp_ptr) TMP_ALLOC ((x_size + 1) * BYTES_PER_MP_LIMB); |

77 | MPN_COPY (xp, x->_mp_d, x_size); |

78 | |

79 | str_size = mpn_get_str (str, base, xp, x_size); |

80 | |

81 | /* mpn_get_str might make some leading zeros. Skip them. */ |

82 | while (*str == 0) |

83 | { |

84 | str_size--; |

85 | str++; |

86 | } |

87 | |

88 | /* Translate to printable chars. */ |

89 | for (i = 0; i < str_size; i++) |

90 | str[i] = num_to_text[str[i]]; |

91 | str[str_size] = 0; |

92 | |

93 | { |

94 | size_t fwret; |

95 | fwret = fwrite ((char *) str, 1, str_size, stream); |

96 | written += fwret; |

97 | } |

98 | |

99 | TMP_FREE (marker); |

100 | return ferror (stream) ? 0 : written; |

101 | } |

**Note:**See TracBrowser for help on using the repository browser.