HCoop / bpt / guile.git / blame
| Commit | Line | Data |
|---|---|---|
| bfd7932e MV |
1 | TYPE |
| 2 | SCM_TO_TYPE_PROTO (SCM val) | |
| 3 | { | |
| 4 | if (SCM_I_INUMP (val)) | |
| 5 | { | |
| 6 | scm_t_signed_bits n = SCM_I_INUM (val); | |
| 7 | #if SIZEOF_TYPE != 0 && SIZEOF_TYPE > SIZEOF_SCM_T_BITS | |
| 8 | return n; | |
| 9 | #else | |
| 10 | if (n >= TYPE_MIN && n <= TYPE_MAX) | |
| 11 | return n; | |
| 12 | else | |
| 13 | { | |
| 14 | goto out_of_range; | |
| 15 | } | |
| 16 | #endif | |
| 17 | } | |
| 18 | else if (SCM_BIGP (val)) | |
| 19 | { | |
| 20 | if (TYPE_MIN >= SCM_MOST_NEGATIVE_FIXNUM | |
| 21 | && TYPE_MAX <= SCM_MOST_POSITIVE_FIXNUM) | |
| 22 | goto out_of_range; | |
| 23 | else if (TYPE_MIN >= LONG_MIN && TYPE_MAX <= LONG_MAX) | |
| 24 | { | |
| 25 | if (mpz_fits_slong_p (SCM_I_BIG_MPZ (val))) | |
| 26 | { | |
| 27 | long n = mpz_get_si (SCM_I_BIG_MPZ (val)); | |
| 28 | #if SIZEOF_TYPE != 0 && SIZEOF_TYPE > SCM_SIZEOF_LONG | |
| 29 | return n; | |
| 30 | #else | |
| 31 | if (n >= TYPE_MIN && n <= TYPE_MAX) | |
| 32 | return n; | |
| 33 | else | |
| 34 | goto out_of_range; | |
| 35 | #endif | |
| 36 | } | |
| 37 | else | |
| 38 | goto out_of_range; | |
| 39 | } | |
| 40 | else | |
| 41 | { | |
| 42 | scm_t_intmax n; | |
| 43 | size_t count; | |
| 44 | ||
| 45 | if (mpz_sizeinbase (SCM_I_BIG_MPZ (val), 2) | |
| 46 | > CHAR_BIT*sizeof (scm_t_uintmax)) | |
| 47 | goto out_of_range; | |
| 48 | ||
| 49 | mpz_export (&n, &count, 1, sizeof (scm_t_uintmax), 0, 0, | |
| 50 | SCM_I_BIG_MPZ (val)); | |
| 51 | ||
| 52 | if (mpz_sgn (SCM_I_BIG_MPZ (val)) >= 0) | |
| 53 | { | |
| 54 | if (n < 0) | |
| 55 | goto out_of_range; | |
| 56 | } | |
| 57 | else | |
| 58 | { | |
| 59 | n = -n; | |
| 60 | if (n >= 0) | |
| 61 | goto out_of_range; | |
| 62 | } | |
| 63 | ||
| 64 | if (n >= TYPE_MIN && n <= TYPE_MAX) | |
| 65 | return n; | |
| 66 | else | |
| 67 | { | |
| 68 | out_of_range: | |
| 69 | scm_out_of_range (NULL, val); | |
| 70 | return 0; | |
| 71 | } | |
| 72 | } | |
| 73 | } | |
| 74 | else | |
| 75 | { | |
| 76 | scm_wrong_type_arg_msg (NULL, 0, val, "exact integer"); | |
| 77 | return 0; | |
| 78 | } | |
| 79 | } | |
| 80 | ||
| 81 | SCM | |
| 82 | SCM_FROM_TYPE_PROTO (TYPE val) | |
| 83 | { | |
| 84 | #if SIZEOF_TYPE != 0 && SIZEOF_TYPE < SIZEOF_SCM_T_BITS | |
| 85 | return SCM_I_MAKINUM (val); | |
| 86 | #else | |
| 87 | if (SCM_FIXABLE (val)) | |
| 88 | return SCM_I_MAKINUM (val); | |
| 89 | else if (val >= LONG_MIN && val <= LONG_MAX) | |
| 90 | { | |
| 91 | SCM z = scm_double_cell (scm_tc16_big, 0, 0, 0); | |
| 92 | mpz_init_set_si (SCM_I_BIG_MPZ (z), val); | |
| 93 | return z; | |
| 94 | } | |
| 95 | else | |
| 96 | { | |
| 97 | SCM z = scm_double_cell (scm_tc16_big, 0, 0, 0); | |
| 98 | mpz_init (SCM_I_BIG_MPZ (z)); | |
| 99 | if (val < 0) | |
| 100 | { | |
| 101 | val = -val; | |
| 102 | mpz_import (SCM_I_BIG_MPZ (z), 1, 1, sizeof (TYPE), 0, 0, | |
| 103 | &val); | |
| 104 | mpz_neg (SCM_I_BIG_MPZ (z), SCM_I_BIG_MPZ (z)); | |
| 105 | } | |
| 106 | else | |
| 107 | mpz_import (SCM_I_BIG_MPZ (z), 1, 1, sizeof (TYPE), 0, 0, | |
| 108 | &val); | |
| 109 | return z; | |
| 110 | } | |
| 111 | #endif | |
| 112 | } | |
| 113 | ||
| 114 | /* clean up */ | |
| 115 | #undef TYPE | |
| 116 | #undef TYPE_MIN | |
| 117 | #undef TYPE_MAX | |
| 118 | #undef SIZEOF_TYPE | |
| 119 | #undef SCM_TO_TYPE_PROTO | |
| 120 | #undef SCM_FROM_TYPE_PROTO | |
| 121 | ||
| 122 | /* | |
| 123 | Local Variables: | |
| 124 | c-file-style: "gnu" | |
| 125 | End: | |
| 126 | */ |