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1983
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1 /* Numeric types for XEmacs.
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2 Copyright (C) 2004 Jerry James.
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3
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4 This file is part of XEmacs.
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5
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6 XEmacs is free software; you can redistribute it and/or modify it
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7 under the terms of the GNU General Public License as published by the
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8 Free Software Foundation; either version 2, or (at your option) any
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9 later version.
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10
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11 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with XEmacs; see the file COPYING. If not, write to
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18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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19 Boston, MA 02111-1307, USA. */
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20
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21 /* Synched up with: Not in FSF. */
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22
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23 #include <config.h>
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24 #include <limits.h>
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25 #include "lisp.h"
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26
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2595
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27 #ifdef HAVE_BIGFLOAT
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28 #define USED_IF_BIGFLOAT(decl) decl
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29 #else
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30 #define USED_IF_BIGFLOAT(decl) UNUSED (decl)
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31 #endif
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32
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2001
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33 Lisp_Object Qrationalp, Qfloatingp, Qrealp;
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1983
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34 Lisp_Object Vdefault_float_precision;
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35 Fixnum Vmost_negative_fixnum, Vmost_positive_fixnum;
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36 static Lisp_Object Qunsupported_type;
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37 static Lisp_Object Vbigfloat_max_prec;
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38 static int number_initialized;
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39
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40 #ifdef HAVE_BIGNUM
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41 bignum scratch_bignum, scratch_bignum2;
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42 #endif
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43 #ifdef HAVE_RATIO
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44 ratio scratch_ratio;
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45 #endif
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46 #ifdef HAVE_BIGFLOAT
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47 bigfloat scratch_bigfloat, scratch_bigfloat2;
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48 #endif
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49
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50 /********************************* Bignums **********************************/
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51 #ifdef HAVE_BIGNUM
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52 static void
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2286
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53 bignum_print (Lisp_Object obj, Lisp_Object printcharfun,
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54 int UNUSED (escapeflag))
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1983
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55 {
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56 CIbyte *bstr = bignum_to_string (XBIGNUM_DATA (obj), 10);
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57 write_c_string (printcharfun, bstr);
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58 xfree (bstr, CIbyte *);
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59 }
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60
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61 static int
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2286
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62 bignum_equal (Lisp_Object obj1, Lisp_Object obj2, int UNUSED (depth))
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1983
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63 {
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64 return bignum_eql (XBIGNUM_DATA (obj1), XBIGNUM_DATA (obj2));
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65 }
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66
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67 static Hashcode
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2286
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68 bignum_hash (Lisp_Object obj, int UNUSED (depth))
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1983
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69 {
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70 return bignum_hashcode (XBIGNUM_DATA (obj));
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71 }
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72
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2551
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73 static void
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74 bignum_convert (const void *object, void **data, Bytecount *size)
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75 {
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76 CIbyte *bstr = bignum_to_string (*(bignum *)object, 10);
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77 *data = bstr;
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78 *size = strlen(bstr)+1;
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79 }
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80
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81 static void
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82 bignum_convfree (const void * UNUSED (object), void *data,
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83 Bytecount UNUSED (size))
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84 {
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85 xfree (data, void *);
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86 }
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87
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88 static void *
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89 bignum_deconvert (void *object, void *data, Bytecount UNUSED (size))
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90 {
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91 bignum *b = (bignum *) object;
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92 bignum_init(*b);
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93 bignum_set_string(*b, (const char *) data, 10);
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94 return object;
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95 }
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96
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97 static const struct opaque_convert_functions bignum_opc = {
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98 bignum_convert,
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99 bignum_convfree,
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100 bignum_deconvert
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101 };
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102
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1983
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103 static const struct memory_description bignum_description[] = {
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2551
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104 { XD_OPAQUE_DATA_CONVERTIBLE, offsetof (Lisp_Bignum, data),
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105 0, { &bignum_opc }, XD_FLAG_NO_KKCC },
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1983
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106 { XD_END }
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107 };
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108
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2551
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109 DEFINE_BASIC_LRECORD_IMPLEMENTATION ("bignum", bignum, 1, 0, bignum_print,
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2061
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110 0, bignum_equal, bignum_hash,
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111 bignum_description, Lisp_Bignum);
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1983
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112
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2092
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113 #endif /* HAVE_BIGNUM */
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1983
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114
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115 Lisp_Object Qbignump;
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116
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117 DEFUN ("bignump", Fbignump, 1, 1, 0, /*
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118 Return t if OBJECT is a bignum, nil otherwise.
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119 */
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120 (object))
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121 {
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122 return BIGNUMP (object) ? Qt : Qnil;
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123 }
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124
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125
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126 /********************************* Integers *********************************/
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127 DEFUN ("integerp", Fintegerp, 1, 1, 0, /*
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128 Return t if OBJECT is an integer, nil otherwise.
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129 */
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130 (object))
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131 {
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132 return INTEGERP (object) ? Qt : Qnil;
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133 }
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134
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135 DEFUN ("evenp", Fevenp, 1, 1, 0, /*
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136 Return t if INTEGER is even, nil otherwise.
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137 */
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138 (integer))
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139 {
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140 CONCHECK_INTEGER (integer);
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1996
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141 return (BIGNUMP (integer)
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142 ? bignum_evenp (XBIGNUM_DATA (integer))
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143 : XTYPE (integer) == Lisp_Type_Int_Even) ? Qt : Qnil;
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1983
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144 }
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145
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2019
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146 DEFUN ("oddp", Foddp, 1, 1, 0, /*
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1983
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147 Return t if INTEGER is odd, nil otherwise.
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148 */
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149 (integer))
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150 {
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151 CONCHECK_INTEGER (integer);
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1996
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152 return (BIGNUMP (integer)
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153 ? bignum_oddp (XBIGNUM_DATA (integer))
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154 : XTYPE (integer) == Lisp_Type_Int_Odd) ? Qt : Qnil;
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1983
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155 }
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156
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157
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158 /********************************** Ratios **********************************/
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159 #ifdef HAVE_RATIO
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160 static void
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2286
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161 ratio_print (Lisp_Object obj, Lisp_Object printcharfun,
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162 int UNUSED (escapeflag))
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1983
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163 {
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164 CIbyte *rstr = ratio_to_string (XRATIO_DATA (obj), 10);
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165 write_c_string (printcharfun, rstr);
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166 xfree (rstr, CIbyte *);
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167 }
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168
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169 static int
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2286
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170 ratio_equal (Lisp_Object obj1, Lisp_Object obj2, int UNUSED (depth))
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1983
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171 {
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172 return ratio_eql (XRATIO_DATA (obj1), XRATIO_DATA (obj2));
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173 }
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174
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175 static Hashcode
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2286
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176 ratio_hash (Lisp_Object obj, int UNUSED (depth))
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1983
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177 {
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178 return ratio_hashcode (XRATIO_DATA (obj));
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179 }
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180
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181 static const struct memory_description ratio_description[] = {
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182 { XD_OPAQUE_PTR, offsetof (Lisp_Ratio, data) },
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183 { XD_END }
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184 };
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185
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2061
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186 DEFINE_BASIC_LRECORD_IMPLEMENTATION ("ratio", ratio, 0, 0, ratio_print,
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187 0, ratio_equal, ratio_hash,
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188 ratio_description, Lisp_Ratio);
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1983
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189
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2092
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190 #endif /* HAVE_RATIO */
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1983
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191
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192 Lisp_Object Qratiop;
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193
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194 DEFUN ("ratiop", Fratiop, 1, 1, 0, /*
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195 Return t if OBJECT is a ratio, nil otherwise.
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196 */
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197 (object))
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198 {
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199 return RATIOP (object) ? Qt : Qnil;
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200 }
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201
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202
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203 /******************************** Rationals *********************************/
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204 DEFUN ("rationalp", Frationalp, 1, 1, 0, /*
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205 Return t if OBJECT is a rational, nil otherwise.
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206 */
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207 (object))
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208 {
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209 return RATIONALP (object) ? Qt : Qnil;
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210 }
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211
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212 DEFUN ("numerator", Fnumerator, 1, 1, 0, /*
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213 Return the numerator of the canonical form of RATIONAL.
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214 If RATIONAL is an integer, RATIONAL is returned.
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215 */
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216 (rational))
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217 {
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218 CONCHECK_RATIONAL (rational);
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219 #ifdef HAVE_RATIO
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220 return RATIOP (rational)
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221 ? make_bignum_bg (XRATIO_NUMERATOR (rational))
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222 : rational;
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223 #else
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224 return rational;
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225 #endif
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226 }
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227
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228 DEFUN ("denominator", Fdenominator, 1, 1, 0, /*
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229 Return the denominator of the canonical form of RATIONAL.
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230 If RATIONAL is an integer, 1 is returned.
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231 */
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232 (rational))
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233 {
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234 CONCHECK_RATIONAL (rational);
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235 #ifdef HAVE_RATIO
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236 return RATIOP (rational)
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237 ? make_bignum_bg (XRATIO_DENOMINATOR (rational))
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238 : make_int (1);
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239 #else
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240 return rational;
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241 #endif
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242 }
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243
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244
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245 /******************************** Bigfloats *********************************/
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246 #ifdef HAVE_BIGFLOAT
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247 static void
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2286
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248 bigfloat_print (Lisp_Object obj, Lisp_Object printcharfun,
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249 int UNUSED (escapeflag))
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1983
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250 {
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251 CIbyte *fstr = bigfloat_to_string (XBIGFLOAT_DATA (obj), 10);
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252 write_c_string (printcharfun, fstr);
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253 xfree (fstr, CIbyte *);
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254 }
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255
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256 static int
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2286
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257 bigfloat_equal (Lisp_Object obj1, Lisp_Object obj2, int UNUSED (depth))
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1983
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258 {
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259 return bigfloat_eql (XBIGFLOAT_DATA (obj1), XBIGFLOAT_DATA (obj2));
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260 }
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261
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262 static Hashcode
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2286
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263 bigfloat_hash (Lisp_Object obj, int UNUSED (depth))
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1983
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264 {
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265 return bigfloat_hashcode (XBIGFLOAT_DATA (obj));
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266 }
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267
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268 static const struct memory_description bigfloat_description[] = {
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269 { XD_OPAQUE_PTR, offsetof (Lisp_Bigfloat, bf) },
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270 { XD_END }
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271 };
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272
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2061
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273 DEFINE_BASIC_LRECORD_IMPLEMENTATION ("bigfloat", bigfloat, 1, 0,
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274 bigfloat_print, 0,
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275 bigfloat_equal, bigfloat_hash,
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276 bigfloat_description, Lisp_Bigfloat);
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1983
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277
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2092
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278 #endif /* HAVE_BIGFLOAT */
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1983
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279
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280 Lisp_Object Qbigfloatp;
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281
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282 DEFUN ("bigfloatp", Fbigfloatp, 1, 1, 0, /*
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283 Return t if OBJECT is a bigfloat, nil otherwise.
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284 */
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285 (object))
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286 {
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287 return BIGFLOATP (object) ? Qt : Qnil;
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288 }
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289
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2092
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290 DEFUN ("bigfloat-get-precision", Fbigfloat_get_precision, 1, 1, 0, /*
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291 Return the precision of bigfloat F as an integer.
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292 */
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293 (f))
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294 {
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295 CHECK_BIGFLOAT (f);
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296 #ifdef HAVE_BIGNUM
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297 bignum_set_ulong (scratch_bignum, XBIGFLOAT_GET_PREC (f));
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298 return Fcanonicalize_number (make_bignum_bg (scratch_bignum));
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299 #else
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300 return make_int ((int) XBIGFLOAT_GET_PREC (f));
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301 #endif
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302 }
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303
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304 DEFUN ("bigfloat-set-precision", Fbigfloat_set_precision, 2, 2, 0, /*
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305 Set the precision of F, a bigfloat, to PRECISION, a nonnegative integer.
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306 The new precision of F is returned. Note that the return value may differ
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307 from PRECISION if the underlying library is unable to support exactly
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308 PRECISION bits of precision.
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309 */
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310 (f, precision))
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311 {
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312 unsigned long prec;
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313
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314 CHECK_BIGFLOAT (f);
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315 if (INTP (precision))
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316 {
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317 prec = (XINT (precision) <= 0) ? 1UL : (unsigned long) XINT (precision);
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318 }
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319 #ifdef HAVE_BIGNUM
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320 else if (BIGNUMP (precision))
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321 {
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322 prec = bignum_fits_ulong_p (XBIGNUM_DATA (precision))
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323 ? bignum_to_ulong (XBIGNUM_DATA (precision))
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324 : UINT_MAX;
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325 }
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326 #endif
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327 else
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328 {
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329 dead_wrong_type_argument (Qintegerp, f);
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330 return Qnil;
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331 }
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332
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333 XBIGFLOAT_SET_PREC (f, prec);
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334 return Fbigfloat_get_precision (f);
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335 }
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336
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1983
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337 static int
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2286
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338 default_float_precision_changed (Lisp_Object UNUSED (sym), Lisp_Object *val,
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339 Lisp_Object UNUSED (in_object),
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340 int UNUSED (flags))
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1983
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341 {
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342 unsigned long prec;
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343
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344 CONCHECK_INTEGER (*val);
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345 #ifdef HAVE_BIGFLOAT
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346 if (INTP (*val))
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347 prec = XINT (*val);
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348 else
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349 {
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350 if (!bignum_fits_ulong_p (XBIGNUM_DATA (*val)))
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351 args_out_of_range_3 (*val, Qzero, Vbigfloat_max_prec);
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352 prec = bignum_to_ulong (XBIGNUM_DATA (*val));
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353 }
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354 if (prec != 0UL)
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355 bigfloat_set_default_prec (prec);
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356 #endif
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357 return 0;
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358 }
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359
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360
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361 /********************************* Floating *********************************/
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362 Lisp_Object
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363 make_floating (double d)
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364 {
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365 #ifdef HAVE_BIGFLOAT
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366 if (ZEROP (Vdefault_float_precision))
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367 #endif
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368 return make_float (d);
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369 #ifdef HAVE_BIGFLOAT
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370 else
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371 return make_bigfloat (d, 0UL);
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372 #endif
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373 }
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374
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375 DEFUN ("floatingp", Ffloatingp, 1, 1, 0, /*
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376 Return t if OBJECT is a floating point number of any kind, nil otherwise.
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377 */
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378 (object))
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379 {
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380 return FLOATINGP (object) ? Qt : Qnil;
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381 }
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382
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383
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384 /********************************** Reals ***********************************/
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385 DEFUN ("realp", Frealp, 1, 1, 0, /*
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386 Return t if OBJECT is a real, nil otherwise.
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387 */
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388 (object))
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389 {
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390 return REALP (object) ? Qt : Qnil;
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391 }
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392
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393
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394 /********************************* Numbers **********************************/
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395 DEFUN ("canonicalize-number", Fcanonicalize_number, 1, 1, 0, /*
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396 Return the canonical form of NUMBER.
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|
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397 */
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398 (number))
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399 {
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400 /* The tests should go in order from larger, more expressive, or more
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401 complex types to smaller, less expressive, or simpler types so that a
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402 number can cascade all the way down to the simplest type if
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403 appropriate. */
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404 #ifdef HAVE_RATIO
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|
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405 if (RATIOP (number) &&
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|
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406 bignum_fits_long_p (XRATIO_DENOMINATOR (number)) &&
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407 bignum_to_long (XRATIO_DENOMINATOR (number)) == 1L)
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408 number = make_bignum_bg (XRATIO_NUMERATOR (number));
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409 #endif
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410 #ifdef HAVE_BIGNUM
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|
411 if (BIGNUMP (number) && bignum_fits_int_p (XBIGNUM_DATA (number)))
|
|
|
412 {
|
|
|
413 int n = bignum_to_int (XBIGNUM_DATA (number));
|
|
|
414 if (NUMBER_FITS_IN_AN_EMACS_INT (n))
|
|
|
415 number = make_int (n);
|
|
|
416 }
|
|
|
417 #endif
|
|
|
418 return number;
|
|
|
419 }
|
|
|
420
|
|
|
421 enum number_type
|
|
|
422 get_number_type (Lisp_Object arg)
|
|
|
423 {
|
|
|
424 if (INTP (arg))
|
|
|
425 return FIXNUM_T;
|
|
|
426 #ifdef HAVE_BIGNUM
|
|
|
427 if (BIGNUMP (arg))
|
|
|
428 return BIGNUM_T;
|
|
|
429 #endif
|
|
|
430 #ifdef HAVE_RATIO
|
|
|
431 if (RATIOP (arg))
|
|
|
432 return RATIO_T;
|
|
|
433 #endif
|
|
|
434 if (FLOATP (arg))
|
|
|
435 return FLOAT_T;
|
|
|
436 #ifdef HAVE_BIGFLOAT
|
|
|
437 if (BIGFLOATP (arg))
|
|
|
438 return BIGFLOAT_T;
|
|
|
439 #endif
|
|
|
440 /* Catch unintentional bad uses of this function */
|
|
2500
|
441 ABORT ();
|
|
1995
|
442 /* NOTREACHED */
|
|
|
443 return FIXNUM_T;
|
|
1983
|
444 }
|
|
|
445
|
|
|
446 /* Convert NUMBER to type TYPE. If TYPE is BIGFLOAT_T then use the indicated
|
|
|
447 PRECISION; otherwise, PRECISION is ignored. */
|
|
|
448 static Lisp_Object
|
|
|
449 internal_coerce_number (Lisp_Object number, enum number_type type,
|
|
2286
|
450 #ifdef HAVE_BIGFLOAT
|
|
|
451 unsigned long precision
|
|
|
452 #else
|
|
|
453 unsigned long UNUSED (precision)
|
|
|
454 #endif
|
|
|
455 )
|
|
1983
|
456 {
|
|
|
457 enum number_type current_type;
|
|
|
458
|
|
|
459 if (CHARP (number))
|
|
|
460 number = make_int (XCHAR (number));
|
|
|
461 else if (MARKERP (number))
|
|
|
462 number = make_int (marker_position (number));
|
|
|
463
|
|
|
464 /* Note that CHECK_NUMBER ensures that NUMBER is a supported type. Hence,
|
|
2500
|
465 we ABORT() in the #else sections below, because it shouldn't be possible
|
|
1983
|
466 to arrive there. */
|
|
|
467 CHECK_NUMBER (number);
|
|
|
468 current_type = get_number_type (number);
|
|
|
469 switch (current_type)
|
|
|
470 {
|
|
|
471 case FIXNUM_T:
|
|
|
472 switch (type)
|
|
|
473 {
|
|
|
474 case FIXNUM_T:
|
|
|
475 return number;
|
|
|
476 case BIGNUM_T:
|
|
|
477 #ifdef HAVE_BIGNUM
|
|
|
478 return make_bignum (XREALINT (number));
|
|
|
479 #else
|
|
2500
|
480 ABORT ();
|
|
1983
|
481 #endif /* HAVE_BIGNUM */
|
|
|
482 case RATIO_T:
|
|
|
483 #ifdef HAVE_RATIO
|
|
|
484 return make_ratio (XREALINT (number), 1UL);
|
|
|
485 #else
|
|
2500
|
486 ABORT ();
|
|
1983
|
487 #endif /* HAVE_RATIO */
|
|
|
488 case FLOAT_T:
|
|
|
489 return make_float (XREALINT (number));
|
|
|
490 case BIGFLOAT_T:
|
|
|
491 #ifdef HAVE_BIGFLOAT
|
|
|
492 return make_bigfloat (XREALINT (number), precision);
|
|
|
493 #else
|
|
2500
|
494 ABORT ();
|
|
1983
|
495 #endif /* HAVE_BIGFLOAT */
|
|
|
496 }
|
|
|
497 case BIGNUM_T:
|
|
|
498 #ifdef HAVE_BIGNUM
|
|
|
499 switch (type)
|
|
|
500 {
|
|
|
501 case FIXNUM_T:
|
|
|
502 return make_int (bignum_to_long (XBIGNUM_DATA (number)));
|
|
|
503 case BIGNUM_T:
|
|
|
504 return number;
|
|
|
505 case RATIO_T:
|
|
|
506 #ifdef HAVE_RATIO
|
|
|
507 bignum_set_long (scratch_bignum, 1L);
|
|
|
508 return make_ratio_bg (XBIGNUM_DATA (number), scratch_bignum);
|
|
|
509 #else
|
|
2500
|
510 ABORT ();
|
|
1983
|
511 #endif /* HAVE_RATIO */
|
|
|
512 case FLOAT_T:
|
|
|
513 return make_float (bignum_to_double (XBIGNUM_DATA (number)));
|
|
|
514 case BIGFLOAT_T:
|
|
|
515 #ifdef HAVE_BIGFLOAT
|
|
|
516 {
|
|
|
517 Lisp_Object temp;
|
|
|
518 temp = make_bigfloat (0.0, precision);
|
|
|
519 bigfloat_set_bignum (XBIGFLOAT_DATA (temp), XBIGNUM_DATA (number));
|
|
|
520 return temp;
|
|
|
521 }
|
|
|
522 #else
|
|
2500
|
523 ABORT ();
|
|
1983
|
524 #endif /* HAVE_BIGFLOAT */
|
|
|
525 }
|
|
|
526 #else
|
|
2500
|
527 ABORT ();
|
|
1983
|
528 #endif /* HAVE_BIGNUM */
|
|
|
529 case RATIO_T:
|
|
|
530 #ifdef HAVE_RATIO
|
|
|
531 switch (type)
|
|
|
532 {
|
|
|
533 case FIXNUM_T:
|
|
|
534 bignum_div (scratch_bignum, XRATIO_NUMERATOR (number),
|
|
|
535 XRATIO_DENOMINATOR (number));
|
|
|
536 return make_int (bignum_to_long (scratch_bignum));
|
|
|
537 case BIGNUM_T:
|
|
|
538 bignum_div (scratch_bignum, XRATIO_NUMERATOR (number),
|
|
|
539 XRATIO_DENOMINATOR (number));
|
|
|
540 return make_bignum_bg (scratch_bignum);
|
|
|
541 case RATIO_T:
|
|
|
542 return number;
|
|
|
543 case FLOAT_T:
|
|
|
544 return make_float (ratio_to_double (XRATIO_DATA (number)));
|
|
|
545 case BIGFLOAT_T:
|
|
|
546 #ifdef HAVE_BIGFLOAT
|
|
|
547 {
|
|
|
548 Lisp_Object temp;
|
|
|
549 temp = make_bigfloat (0.0, precision);
|
|
|
550 bigfloat_set_ratio (XBIGFLOAT_DATA (temp), XRATIO_DATA (number));
|
|
|
551 return temp;
|
|
|
552 }
|
|
|
553 #else
|
|
2500
|
554 ABORT ();
|
|
1983
|
555 #endif /* HAVE_BIGFLOAT */
|
|
|
556 }
|
|
|
557 #else
|
|
2500
|
558 ABORT ();
|
|
1983
|
559 #endif /* HAVE_RATIO */
|
|
|
560 case FLOAT_T:
|
|
|
561 switch (type)
|
|
|
562 {
|
|
|
563 case FIXNUM_T:
|
|
1995
|
564 return Ftruncate (number);
|
|
1983
|
565 case BIGNUM_T:
|
|
|
566 #ifdef HAVE_BIGNUM
|
|
|
567 bignum_set_double (scratch_bignum, XFLOAT_DATA (number));
|
|
|
568 return make_bignum_bg (scratch_bignum);
|
|
|
569 #else
|
|
2500
|
570 ABORT ();
|
|
1983
|
571 #endif /* HAVE_BIGNUM */
|
|
|
572 case RATIO_T:
|
|
|
573 #ifdef HAVE_RATIO
|
|
|
574 ratio_set_double (scratch_ratio, XFLOAT_DATA (number));
|
|
|
575 return make_ratio_rt (scratch_ratio);
|
|
|
576 #else
|
|
2500
|
577 ABORT ();
|
|
1983
|
578 #endif /* HAVE_RATIO */
|
|
|
579 case FLOAT_T:
|
|
|
580 return number;
|
|
|
581 case BIGFLOAT_T:
|
|
|
582 #ifdef HAVE_BIGFLOAT
|
|
|
583 bigfloat_set_prec (scratch_bigfloat, precision);
|
|
|
584 bigfloat_set_double (scratch_bigfloat, XFLOAT_DATA (number));
|
|
|
585 return make_bigfloat_bf (scratch_bigfloat);
|
|
|
586 #else
|
|
2500
|
587 ABORT ();
|
|
1983
|
588 #endif /* HAVE_BIGFLOAT */
|
|
|
589 }
|
|
|
590 case BIGFLOAT_T:
|
|
|
591 #ifdef HAVE_BIGFLOAT
|
|
|
592 switch (type)
|
|
|
593 {
|
|
|
594 case FIXNUM_T:
|
|
|
595 return make_int (bigfloat_to_long (XBIGFLOAT_DATA (number)));
|
|
|
596 case BIGNUM_T:
|
|
|
597 #ifdef HAVE_BIGNUM
|
|
|
598 bignum_set_bigfloat (scratch_bignum, XBIGFLOAT_DATA (number));
|
|
|
599 return make_bignum_bg (scratch_bignum);
|
|
|
600 #else
|
|
2500
|
601 ABORT ();
|
|
1983
|
602 #endif /* HAVE_BIGNUM */
|
|
|
603 case RATIO_T:
|
|
|
604 #ifdef HAVE_RATIO
|
|
|
605 ratio_set_bigfloat (scratch_ratio, XBIGFLOAT_DATA (number));
|
|
|
606 return make_ratio_rt (scratch_ratio);
|
|
|
607 #else
|
|
2500
|
608 ABORT ();
|
|
1983
|
609 #endif
|
|
|
610 case FLOAT_T:
|
|
|
611 return make_float (bigfloat_to_double (XBIGFLOAT_DATA (number)));
|
|
|
612 case BIGFLOAT_T:
|
|
|
613 /* FIXME: Do we need to change the precision? */
|
|
|
614 return number;
|
|
|
615 }
|
|
|
616 #else
|
|
2500
|
617 ABORT ();
|
|
1983
|
618 #endif /* HAVE_BIGFLOAT */
|
|
|
619 }
|
|
2500
|
620 ABORT ();
|
|
1995
|
621 /* NOTREACHED */
|
|
|
622 return Qzero;
|
|
1983
|
623 }
|
|
|
624
|
|
|
625 /* This function promotes its arguments as necessary to make them both the
|
|
|
626 same type. It destructively modifies its arguments to do so. Characters
|
|
|
627 and markers are ALWAYS converted to integers. */
|
|
|
628 enum number_type
|
|
|
629 promote_args (Lisp_Object *arg1, Lisp_Object *arg2)
|
|
|
630 {
|
|
|
631 enum number_type type1, type2;
|
|
|
632
|
|
|
633 if (CHARP (*arg1))
|
|
|
634 *arg1 = make_int (XCHAR (*arg1));
|
|
|
635 else if (MARKERP (*arg1))
|
|
|
636 *arg1 = make_int (marker_position (*arg1));
|
|
|
637 if (CHARP (*arg2))
|
|
|
638 *arg2 = make_int (XCHAR (*arg2));
|
|
|
639 else if (MARKERP (*arg2))
|
|
|
640 *arg2 = make_int (marker_position (*arg2));
|
|
|
641
|
|
|
642 CHECK_NUMBER (*arg1);
|
|
|
643 CHECK_NUMBER (*arg2);
|
|
|
644
|
|
|
645 type1 = get_number_type (*arg1);
|
|
|
646 type2 = get_number_type (*arg2);
|
|
|
647
|
|
|
648 if (type1 < type2)
|
|
|
649 {
|
|
|
650 *arg1 = internal_coerce_number (*arg1, type2,
|
|
|
651 #ifdef HAVE_BIGFLOAT
|
|
|
652 type2 == BIGFLOAT_T
|
|
|
653 ? XBIGFLOAT_GET_PREC (*arg2) :
|
|
|
654 #endif
|
|
|
655 0UL);
|
|
|
656 return type2;
|
|
|
657 }
|
|
|
658
|
|
|
659 if (type2 < type1)
|
|
|
660 {
|
|
|
661 *arg2 = internal_coerce_number (*arg2, type1,
|
|
|
662 #ifdef HAVE_BIGFLOAT
|
|
|
663 type1 == BIGFLOAT_T
|
|
|
664 ? XBIGFLOAT_GET_PREC (*arg1) :
|
|
|
665 #endif
|
|
|
666 0UL);
|
|
|
667 return type1;
|
|
|
668 }
|
|
|
669
|
|
|
670 /* No conversion necessary */
|
|
|
671 return type1;
|
|
|
672 }
|
|
|
673
|
|
|
674 DEFUN ("coerce-number", Fcoerce_number, 2, 3, 0, /*
|
|
|
675 Convert NUMBER to the indicated type, possibly losing information.
|
|
|
676 Do not call this function. Use `coerce' instead.
|
|
|
677
|
|
|
678 TYPE is one of the symbols 'fixnum, 'integer, 'ratio, 'float, or 'bigfloat.
|
|
|
679 Not all of these types may be supported.
|
|
|
680
|
|
|
681 PRECISION is the number of bits of precision to use when converting to
|
|
|
682 bigfloat; it is ignored otherwise. If nil, the default precision is used.
|
|
|
683
|
|
|
684 Note that some conversions lose information. No error is signaled in such
|
|
|
685 cases; the information is silently lost.
|
|
|
686 */
|
|
2595
|
687 (number, type, USED_IF_BIGFLOAT (precision)))
|
|
1983
|
688 {
|
|
|
689 CHECK_SYMBOL (type);
|
|
|
690 if (EQ (type, Qfixnum))
|
|
|
691 return internal_coerce_number (number, FIXNUM_T, 0UL);
|
|
|
692 else if (EQ (type, Qinteger))
|
|
|
693 {
|
|
|
694 /* If bignums are available, we always convert to one first, then
|
|
|
695 downgrade to a fixnum if possible. */
|
|
|
696 #ifdef HAVE_BIGNUM
|
|
|
697 return Fcanonicalize_number
|
|
|
698 (internal_coerce_number (number, BIGNUM_T, 0UL));
|
|
|
699 #else
|
|
|
700 return internal_coerce_number (number, FIXNUM_T, 0UL);
|
|
|
701 #endif
|
|
|
702 }
|
|
|
703 #ifdef HAVE_RATIO
|
|
|
704 else if (EQ (type, Qratio))
|
|
|
705 return internal_coerce_number (number, RATIO_T, 0UL);
|
|
|
706 #endif
|
|
|
707 else if (EQ (type, Qfloat))
|
|
|
708 return internal_coerce_number (number, FLOAT_T, 0UL);
|
|
|
709 #ifdef HAVE_BIGFLOAT
|
|
|
710 else if (EQ (type, Qbigfloat))
|
|
|
711 {
|
|
|
712 unsigned long prec;
|
|
|
713
|
|
|
714 if (NILP (precision))
|
|
|
715 prec = bigfloat_get_default_prec ();
|
|
|
716 else
|
|
|
717 {
|
|
|
718 CHECK_INTEGER (precision);
|
|
|
719 #ifdef HAVE_BIGNUM
|
|
|
720 if (INTP (precision))
|
|
|
721 #endif /* HAVE_BIGNUM */
|
|
|
722 prec = (unsigned long) XREALINT (precision);
|
|
|
723 #ifdef HAVE_BIGNUM
|
|
|
724 else
|
|
|
725 {
|
|
|
726 if (!bignum_fits_ulong_p (XBIGNUM_DATA (precision)))
|
|
|
727 args_out_of_range (precision, Vbigfloat_max_prec);
|
|
|
728 prec = bignum_to_ulong (XBIGNUM_DATA (precision));
|
|
|
729 }
|
|
|
730 #endif /* HAVE_BIGNUM */
|
|
|
731 }
|
|
|
732 return internal_coerce_number (number, BIGFLOAT_T, prec);
|
|
|
733 }
|
|
|
734 #endif /* HAVE_BIGFLOAT */
|
|
|
735
|
|
|
736 Fsignal (Qunsupported_type, type);
|
|
|
737 /* NOTREACHED */
|
|
|
738 return Qnil;
|
|
|
739 }
|
|
|
740
|
|
|
741
|
|
|
742 void
|
|
|
743 syms_of_number (void)
|
|
|
744 {
|
|
|
745 #ifdef HAVE_BIGNUM
|
|
|
746 INIT_LRECORD_IMPLEMENTATION (bignum);
|
|
|
747 #endif
|
|
|
748 #ifdef HAVE_RATIO
|
|
|
749 INIT_LRECORD_IMPLEMENTATION (ratio);
|
|
|
750 #endif
|
|
|
751 #ifdef HAVE_BIGFLOAT
|
|
|
752 INIT_LRECORD_IMPLEMENTATION (bigfloat);
|
|
|
753 #endif
|
|
|
754
|
|
|
755 /* Type predicates */
|
|
|
756 DEFSYMBOL (Qrationalp);
|
|
|
757 DEFSYMBOL (Qfloatingp);
|
|
|
758 DEFSYMBOL (Qrealp);
|
|
|
759 DEFSYMBOL (Qbignump);
|
|
|
760 DEFSYMBOL (Qratiop);
|
|
|
761 DEFSYMBOL (Qbigfloatp);
|
|
|
762
|
|
|
763 /* Functions */
|
|
|
764 DEFSUBR (Fbignump);
|
|
|
765 DEFSUBR (Fintegerp);
|
|
|
766 DEFSUBR (Fevenp);
|
|
|
767 DEFSUBR (Foddp);
|
|
|
768 DEFSUBR (Fratiop);
|
|
|
769 DEFSUBR (Frationalp);
|
|
|
770 DEFSUBR (Fnumerator);
|
|
|
771 DEFSUBR (Fdenominator);
|
|
|
772 DEFSUBR (Fbigfloatp);
|
|
2092
|
773 DEFSUBR (Fbigfloat_get_precision);
|
|
|
774 DEFSUBR (Fbigfloat_set_precision);
|
|
2001
|
775 DEFSUBR (Ffloatingp);
|
|
1983
|
776 DEFSUBR (Frealp);
|
|
|
777 DEFSUBR (Fcanonicalize_number);
|
|
|
778 DEFSUBR (Fcoerce_number);
|
|
|
779
|
|
|
780 /* Errors */
|
|
|
781 DEFERROR_STANDARD (Qunsupported_type, Qwrong_type_argument);
|
|
|
782 }
|
|
|
783
|
|
|
784 void
|
|
|
785 vars_of_number (void)
|
|
|
786 {
|
|
2051
|
787 /* These variables are Lisp variables rather than number variables so that
|
|
|
788 we can put bignums in them. */
|
|
1983
|
789 DEFVAR_LISP_MAGIC ("default-float-precision", &Vdefault_float_precision, /*
|
|
|
790 The default floating-point precision for newly created floating point values.
|
|
2092
|
791 This should be 0 to create Lisp float types, or an unsigned integer no greater
|
|
|
792 than `bigfloat-maximum-precision' to create Lisp bigfloat types with the
|
|
|
793 indicated precision.
|
|
1983
|
794 */ default_float_precision_changed);
|
|
|
795 Vdefault_float_precision = make_int (0);
|
|
|
796
|
|
2092
|
797 DEFVAR_CONST_LISP ("bigfloat-maximum-precision", &Vbigfloat_max_prec /*
|
|
1983
|
798 The maximum number of bits of precision a bigfloat can have.
|
|
2092
|
799 This is determined by the underlying library used to implement bigfloats.
|
|
1983
|
800 */);
|
|
|
801
|
|
2061
|
802 #ifdef HAVE_BIGFLOAT
|
|
|
803 #ifdef HAVE_BIGNUM
|
|
|
804 Vbigfloat_max_prec = make_bignum (0L);
|
|
|
805 bignum_set_ulong (XBIGNUM_DATA (Vbigfloat_max_prec), ULONG_MAX);
|
|
2051
|
806 #else
|
|
2061
|
807 Vbigfloat_max_prec = make_int (EMACS_INT_MAX);
|
|
|
808 #endif
|
|
|
809 #else
|
|
2051
|
810 Vbigfloat_max_prec = make_int (0);
|
|
|
811 #endif /* HAVE_BIGFLOAT */
|
|
|
812
|
|
1983
|
813 DEFVAR_CONST_INT ("most-negative-fixnum", &Vmost_negative_fixnum /*
|
|
|
814 The fixnum closest in value to negative infinity.
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815 */);
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|
|
816 Vmost_negative_fixnum = EMACS_INT_MIN;
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|
|
817
|
|
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818 DEFVAR_CONST_INT ("most-positive-fixnum", &Vmost_positive_fixnum /*
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|
|
819 The fixnum closest in value to positive infinity.
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|
|
820 */);
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|
|
821 Vmost_positive_fixnum = EMACS_INT_MAX;
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|
|
822
|
|
|
823 Fprovide (intern ("number-types"));
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|
|
824 #ifdef HAVE_BIGNUM
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|
|
825 Fprovide (intern ("bignum"));
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|
|
826 #endif
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|
|
827 #ifdef HAVE_RATIO
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|
|
828 Fprovide (intern ("ratio"));
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|
|
829 #endif
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|
|
830 #ifdef HAVE_BIGFLOAT
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|
|
831 Fprovide (intern ("bigfloat"));
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|
|
832 #endif
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|
|
833 }
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|
|
834
|
|
|
835 void
|
|
|
836 init_number (void)
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|
|
837 {
|
|
|
838 if (!number_initialized)
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|
|
839 {
|
|
|
840 number_initialized = 1;
|
|
|
841
|
|
|
842 #ifdef WITH_GMP
|
|
|
843 init_number_gmp ();
|
|
|
844 #endif
|
|
|
845 #ifdef WITH_MP
|
|
|
846 init_number_mp ();
|
|
|
847 #endif
|
|
|
848
|
|
|
849 #ifdef HAVE_BIGNUM
|
|
|
850 bignum_init (scratch_bignum);
|
|
|
851 bignum_init (scratch_bignum2);
|
|
|
852 #endif
|
|
|
853
|
|
|
854 #ifdef HAVE_RATIO
|
|
|
855 ratio_init (scratch_ratio);
|
|
|
856 #endif
|
|
|
857
|
|
|
858 #ifdef HAVE_BIGFLOAT
|
|
|
859 bigfloat_init (scratch_bigfloat);
|
|
|
860 bigfloat_init (scratch_bigfloat2);
|
|
|
861 #endif
|
|
|
862 }
|
|
|
863 }
|
