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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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2001
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27 Lisp_Object Qrationalp, Qfloatingp, Qrealp;
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1983
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28 Lisp_Object Vdefault_float_precision;
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29 Fixnum Vmost_negative_fixnum, Vmost_positive_fixnum;
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30 static Lisp_Object Qunsupported_type;
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31 static Lisp_Object Vbigfloat_max_prec;
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32 static int number_initialized;
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33
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34 #ifdef HAVE_BIGNUM
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35 bignum scratch_bignum, scratch_bignum2;
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36 #endif
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37 #ifdef HAVE_RATIO
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38 ratio scratch_ratio;
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39 #endif
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40 #ifdef HAVE_BIGFLOAT
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41 bigfloat scratch_bigfloat, scratch_bigfloat2;
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42 #endif
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43
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44 /********************************* Bignums **********************************/
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45 #ifdef HAVE_BIGNUM
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46 static void
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2286
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47 bignum_print (Lisp_Object obj, Lisp_Object printcharfun,
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48 int UNUSED (escapeflag))
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1983
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49 {
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50 CIbyte *bstr = bignum_to_string (XBIGNUM_DATA (obj), 10);
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51 write_c_string (printcharfun, bstr);
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52 xfree (bstr, CIbyte *);
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53 }
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54
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55 static int
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2286
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56 bignum_equal (Lisp_Object obj1, Lisp_Object obj2, int UNUSED (depth))
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1983
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57 {
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58 return bignum_eql (XBIGNUM_DATA (obj1), XBIGNUM_DATA (obj2));
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59 }
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60
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61 static Hashcode
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2286
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62 bignum_hash (Lisp_Object obj, int UNUSED (depth))
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1983
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63 {
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64 return bignum_hashcode (XBIGNUM_DATA (obj));
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65 }
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66
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2551
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67 static void
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68 bignum_convert (const void *object, void **data, Bytecount *size)
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69 {
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70 CIbyte *bstr = bignum_to_string (*(bignum *)object, 10);
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71 *data = bstr;
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72 *size = strlen(bstr)+1;
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73 }
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74
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75 static void
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76 bignum_convfree (const void * UNUSED (object), void *data,
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77 Bytecount UNUSED (size))
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78 {
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79 xfree (data, void *);
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80 }
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81
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82 static void *
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83 bignum_deconvert (void *object, void *data, Bytecount UNUSED (size))
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84 {
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85 bignum *b = (bignum *) object;
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86 bignum_init(*b);
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87 bignum_set_string(*b, (const char *) data, 10);
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88 return object;
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89 }
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90
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91 static const struct opaque_convert_functions bignum_opc = {
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92 bignum_convert,
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93 bignum_convfree,
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94 bignum_deconvert
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95 };
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96
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1983
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97 static const struct memory_description bignum_description[] = {
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2551
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98 { XD_OPAQUE_DATA_CONVERTIBLE, offsetof (Lisp_Bignum, data),
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99 0, { &bignum_opc }, XD_FLAG_NO_KKCC },
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1983
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100 { XD_END }
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101 };
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102
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2551
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103 DEFINE_BASIC_LRECORD_IMPLEMENTATION ("bignum", bignum, 1, 0, bignum_print,
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2061
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104 0, bignum_equal, bignum_hash,
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105 bignum_description, Lisp_Bignum);
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1983
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106
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2092
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107 #endif /* HAVE_BIGNUM */
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1983
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108
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109 Lisp_Object Qbignump;
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110
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111 DEFUN ("bignump", Fbignump, 1, 1, 0, /*
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112 Return t if OBJECT is a bignum, nil otherwise.
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113 */
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114 (object))
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115 {
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116 return BIGNUMP (object) ? Qt : Qnil;
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117 }
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118
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119
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120 /********************************* Integers *********************************/
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121 DEFUN ("integerp", Fintegerp, 1, 1, 0, /*
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122 Return t if OBJECT is an integer, nil otherwise.
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123 */
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124 (object))
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125 {
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126 return INTEGERP (object) ? Qt : Qnil;
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127 }
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128
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129 DEFUN ("evenp", Fevenp, 1, 1, 0, /*
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130 Return t if INTEGER is even, nil otherwise.
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131 */
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132 (integer))
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133 {
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134 CONCHECK_INTEGER (integer);
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1996
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135 return (BIGNUMP (integer)
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136 ? bignum_evenp (XBIGNUM_DATA (integer))
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137 : XTYPE (integer) == Lisp_Type_Int_Even) ? Qt : Qnil;
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1983
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138 }
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139
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2019
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140 DEFUN ("oddp", Foddp, 1, 1, 0, /*
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1983
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141 Return t if INTEGER is odd, nil otherwise.
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142 */
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143 (integer))
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144 {
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145 CONCHECK_INTEGER (integer);
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1996
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146 return (BIGNUMP (integer)
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147 ? bignum_oddp (XBIGNUM_DATA (integer))
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148 : XTYPE (integer) == Lisp_Type_Int_Odd) ? Qt : Qnil;
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1983
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149 }
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150
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151
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152 /********************************** Ratios **********************************/
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153 #ifdef HAVE_RATIO
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154 static void
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2286
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155 ratio_print (Lisp_Object obj, Lisp_Object printcharfun,
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156 int UNUSED (escapeflag))
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1983
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157 {
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158 CIbyte *rstr = ratio_to_string (XRATIO_DATA (obj), 10);
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159 write_c_string (printcharfun, rstr);
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160 xfree (rstr, CIbyte *);
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161 }
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162
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163 static int
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2286
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164 ratio_equal (Lisp_Object obj1, Lisp_Object obj2, int UNUSED (depth))
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1983
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165 {
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166 return ratio_eql (XRATIO_DATA (obj1), XRATIO_DATA (obj2));
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167 }
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168
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169 static Hashcode
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2286
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170 ratio_hash (Lisp_Object obj, int UNUSED (depth))
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1983
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171 {
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172 return ratio_hashcode (XRATIO_DATA (obj));
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173 }
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174
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175 static const struct memory_description ratio_description[] = {
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176 { XD_OPAQUE_PTR, offsetof (Lisp_Ratio, data) },
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177 { XD_END }
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178 };
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179
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2061
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180 DEFINE_BASIC_LRECORD_IMPLEMENTATION ("ratio", ratio, 0, 0, ratio_print,
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181 0, ratio_equal, ratio_hash,
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182 ratio_description, Lisp_Ratio);
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1983
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183
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2092
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184 #endif /* HAVE_RATIO */
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1983
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185
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186 Lisp_Object Qratiop;
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187
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188 DEFUN ("ratiop", Fratiop, 1, 1, 0, /*
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189 Return t if OBJECT is a ratio, nil otherwise.
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190 */
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191 (object))
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192 {
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193 return RATIOP (object) ? Qt : Qnil;
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194 }
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195
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196
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197 /******************************** Rationals *********************************/
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198 DEFUN ("rationalp", Frationalp, 1, 1, 0, /*
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199 Return t if OBJECT is a rational, nil otherwise.
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200 */
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201 (object))
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202 {
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203 return RATIONALP (object) ? Qt : Qnil;
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204 }
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205
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206 DEFUN ("numerator", Fnumerator, 1, 1, 0, /*
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207 Return the numerator of the canonical form of RATIONAL.
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208 If RATIONAL is an integer, RATIONAL is returned.
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209 */
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210 (rational))
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211 {
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212 CONCHECK_RATIONAL (rational);
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213 #ifdef HAVE_RATIO
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214 return RATIOP (rational)
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215 ? make_bignum_bg (XRATIO_NUMERATOR (rational))
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216 : rational;
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217 #else
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218 return rational;
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219 #endif
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220 }
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221
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222 DEFUN ("denominator", Fdenominator, 1, 1, 0, /*
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223 Return the denominator of the canonical form of RATIONAL.
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224 If RATIONAL is an integer, 1 is returned.
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225 */
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226 (rational))
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227 {
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228 CONCHECK_RATIONAL (rational);
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229 #ifdef HAVE_RATIO
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230 return RATIOP (rational)
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231 ? make_bignum_bg (XRATIO_DENOMINATOR (rational))
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232 : make_int (1);
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233 #else
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234 return rational;
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235 #endif
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236 }
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237
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238
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239 /******************************** Bigfloats *********************************/
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240 #ifdef HAVE_BIGFLOAT
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241 static void
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2286
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242 bigfloat_print (Lisp_Object obj, Lisp_Object printcharfun,
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243 int UNUSED (escapeflag))
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1983
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244 {
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245 CIbyte *fstr = bigfloat_to_string (XBIGFLOAT_DATA (obj), 10);
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246 write_c_string (printcharfun, fstr);
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247 xfree (fstr, CIbyte *);
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248 }
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249
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250 static int
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2286
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251 bigfloat_equal (Lisp_Object obj1, Lisp_Object obj2, int UNUSED (depth))
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1983
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252 {
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253 return bigfloat_eql (XBIGFLOAT_DATA (obj1), XBIGFLOAT_DATA (obj2));
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254 }
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255
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256 static Hashcode
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2286
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257 bigfloat_hash (Lisp_Object obj, int UNUSED (depth))
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1983
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258 {
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259 return bigfloat_hashcode (XBIGFLOAT_DATA (obj));
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260 }
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261
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262 static const struct memory_description bigfloat_description[] = {
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263 { XD_OPAQUE_PTR, offsetof (Lisp_Bigfloat, bf) },
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264 { XD_END }
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265 };
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266
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2061
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267 DEFINE_BASIC_LRECORD_IMPLEMENTATION ("bigfloat", bigfloat, 1, 0,
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268 bigfloat_print, 0,
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269 bigfloat_equal, bigfloat_hash,
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270 bigfloat_description, Lisp_Bigfloat);
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1983
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271
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2092
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272 #endif /* HAVE_BIGFLOAT */
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1983
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273
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274 Lisp_Object Qbigfloatp;
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275
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276 DEFUN ("bigfloatp", Fbigfloatp, 1, 1, 0, /*
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277 Return t if OBJECT is a bigfloat, nil otherwise.
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278 */
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279 (object))
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280 {
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281 return BIGFLOATP (object) ? Qt : Qnil;
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282 }
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283
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2092
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284 DEFUN ("bigfloat-get-precision", Fbigfloat_get_precision, 1, 1, 0, /*
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285 Return the precision of bigfloat F as an integer.
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286 */
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287 (f))
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288 {
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289 CHECK_BIGFLOAT (f);
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290 #ifdef HAVE_BIGNUM
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291 bignum_set_ulong (scratch_bignum, XBIGFLOAT_GET_PREC (f));
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292 return Fcanonicalize_number (make_bignum_bg (scratch_bignum));
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293 #else
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294 return make_int ((int) XBIGFLOAT_GET_PREC (f));
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295 #endif
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296 }
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297
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298 DEFUN ("bigfloat-set-precision", Fbigfloat_set_precision, 2, 2, 0, /*
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299 Set the precision of F, a bigfloat, to PRECISION, a nonnegative integer.
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300 The new precision of F is returned. Note that the return value may differ
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301 from PRECISION if the underlying library is unable to support exactly
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302 PRECISION bits of precision.
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303 */
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304 (f, precision))
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305 {
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306 unsigned long prec;
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307
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308 CHECK_BIGFLOAT (f);
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309 if (INTP (precision))
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310 {
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311 prec = (XINT (precision) <= 0) ? 1UL : (unsigned long) XINT (precision);
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312 }
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313 #ifdef HAVE_BIGNUM
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314 else if (BIGNUMP (precision))
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315 {
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316 prec = bignum_fits_ulong_p (XBIGNUM_DATA (precision))
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317 ? bignum_to_ulong (XBIGNUM_DATA (precision))
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318 : UINT_MAX;
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319 }
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320 #endif
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321 else
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322 {
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323 dead_wrong_type_argument (Qintegerp, f);
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324 return Qnil;
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325 }
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326
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327 XBIGFLOAT_SET_PREC (f, prec);
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328 return Fbigfloat_get_precision (f);
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329 }
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330
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1983
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331 static int
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2286
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332 default_float_precision_changed (Lisp_Object UNUSED (sym), Lisp_Object *val,
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333 Lisp_Object UNUSED (in_object),
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334 int UNUSED (flags))
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1983
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335 {
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336 unsigned long prec;
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337
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338 CONCHECK_INTEGER (*val);
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339 #ifdef HAVE_BIGFLOAT
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340 if (INTP (*val))
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341 prec = XINT (*val);
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342 else
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343 {
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344 if (!bignum_fits_ulong_p (XBIGNUM_DATA (*val)))
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345 args_out_of_range_3 (*val, Qzero, Vbigfloat_max_prec);
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346 prec = bignum_to_ulong (XBIGNUM_DATA (*val));
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347 }
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348 if (prec != 0UL)
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349 bigfloat_set_default_prec (prec);
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350 #endif
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351 return 0;
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352 }
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353
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354
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355 /********************************* Floating *********************************/
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356 Lisp_Object
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357 make_floating (double d)
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358 {
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359 #ifdef HAVE_BIGFLOAT
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360 if (ZEROP (Vdefault_float_precision))
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361 #endif
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362 return make_float (d);
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363 #ifdef HAVE_BIGFLOAT
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364 else
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365 return make_bigfloat (d, 0UL);
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366 #endif
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367 }
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368
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369 DEFUN ("floatingp", Ffloatingp, 1, 1, 0, /*
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370 Return t if OBJECT is a floating point number of any kind, nil otherwise.
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371 */
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372 (object))
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373 {
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374 return FLOATINGP (object) ? Qt : Qnil;
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375 }
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376
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377
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378 /********************************** Reals ***********************************/
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379 DEFUN ("realp", Frealp, 1, 1, 0, /*
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380 Return t if OBJECT is a real, nil otherwise.
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381 */
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382 (object))
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383 {
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384 return REALP (object) ? Qt : Qnil;
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385 }
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386
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387
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388 /********************************* Numbers **********************************/
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389 DEFUN ("canonicalize-number", Fcanonicalize_number, 1, 1, 0, /*
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390 Return the canonical form of NUMBER.
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391 */
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392 (number))
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393 {
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|
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394 /* The tests should go in order from larger, more expressive, or more
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395 complex types to smaller, less expressive, or simpler types so that a
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396 number can cascade all the way down to the simplest type if
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397 appropriate. */
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398 #ifdef HAVE_RATIO
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|
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399 if (RATIOP (number) &&
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400 bignum_fits_long_p (XRATIO_DENOMINATOR (number)) &&
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401 bignum_to_long (XRATIO_DENOMINATOR (number)) == 1L)
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402 number = make_bignum_bg (XRATIO_NUMERATOR (number));
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403 #endif
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404 #ifdef HAVE_BIGNUM
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405 if (BIGNUMP (number) && bignum_fits_int_p (XBIGNUM_DATA (number)))
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406 {
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407 int n = bignum_to_int (XBIGNUM_DATA (number));
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408 if (NUMBER_FITS_IN_AN_EMACS_INT (n))
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409 number = make_int (n);
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410 }
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|
|
411 #endif
|
|
|
412 return number;
|
|
|
413 }
|
|
|
414
|
|
|
415 enum number_type
|
|
|
416 get_number_type (Lisp_Object arg)
|
|
|
417 {
|
|
|
418 if (INTP (arg))
|
|
|
419 return FIXNUM_T;
|
|
|
420 #ifdef HAVE_BIGNUM
|
|
|
421 if (BIGNUMP (arg))
|
|
|
422 return BIGNUM_T;
|
|
|
423 #endif
|
|
|
424 #ifdef HAVE_RATIO
|
|
|
425 if (RATIOP (arg))
|
|
|
426 return RATIO_T;
|
|
|
427 #endif
|
|
|
428 if (FLOATP (arg))
|
|
|
429 return FLOAT_T;
|
|
|
430 #ifdef HAVE_BIGFLOAT
|
|
|
431 if (BIGFLOATP (arg))
|
|
|
432 return BIGFLOAT_T;
|
|
|
433 #endif
|
|
|
434 /* Catch unintentional bad uses of this function */
|
|
2500
|
435 ABORT ();
|
|
1995
|
436 /* NOTREACHED */
|
|
|
437 return FIXNUM_T;
|
|
1983
|
438 }
|
|
|
439
|
|
|
440 /* Convert NUMBER to type TYPE. If TYPE is BIGFLOAT_T then use the indicated
|
|
|
441 PRECISION; otherwise, PRECISION is ignored. */
|
|
|
442 static Lisp_Object
|
|
|
443 internal_coerce_number (Lisp_Object number, enum number_type type,
|
|
2286
|
444 #ifdef HAVE_BIGFLOAT
|
|
|
445 unsigned long precision
|
|
|
446 #else
|
|
|
447 unsigned long UNUSED (precision)
|
|
|
448 #endif
|
|
|
449 )
|
|
1983
|
450 {
|
|
|
451 enum number_type current_type;
|
|
|
452
|
|
|
453 if (CHARP (number))
|
|
|
454 number = make_int (XCHAR (number));
|
|
|
455 else if (MARKERP (number))
|
|
|
456 number = make_int (marker_position (number));
|
|
|
457
|
|
|
458 /* Note that CHECK_NUMBER ensures that NUMBER is a supported type. Hence,
|
|
2500
|
459 we ABORT() in the #else sections below, because it shouldn't be possible
|
|
1983
|
460 to arrive there. */
|
|
|
461 CHECK_NUMBER (number);
|
|
|
462 current_type = get_number_type (number);
|
|
|
463 switch (current_type)
|
|
|
464 {
|
|
|
465 case FIXNUM_T:
|
|
|
466 switch (type)
|
|
|
467 {
|
|
|
468 case FIXNUM_T:
|
|
|
469 return number;
|
|
|
470 case BIGNUM_T:
|
|
|
471 #ifdef HAVE_BIGNUM
|
|
|
472 return make_bignum (XREALINT (number));
|
|
|
473 #else
|
|
2500
|
474 ABORT ();
|
|
1983
|
475 #endif /* HAVE_BIGNUM */
|
|
|
476 case RATIO_T:
|
|
|
477 #ifdef HAVE_RATIO
|
|
|
478 return make_ratio (XREALINT (number), 1UL);
|
|
|
479 #else
|
|
2500
|
480 ABORT ();
|
|
1983
|
481 #endif /* HAVE_RATIO */
|
|
|
482 case FLOAT_T:
|
|
|
483 return make_float (XREALINT (number));
|
|
|
484 case BIGFLOAT_T:
|
|
|
485 #ifdef HAVE_BIGFLOAT
|
|
|
486 return make_bigfloat (XREALINT (number), precision);
|
|
|
487 #else
|
|
2500
|
488 ABORT ();
|
|
1983
|
489 #endif /* HAVE_BIGFLOAT */
|
|
|
490 }
|
|
|
491 case BIGNUM_T:
|
|
|
492 #ifdef HAVE_BIGNUM
|
|
|
493 switch (type)
|
|
|
494 {
|
|
|
495 case FIXNUM_T:
|
|
|
496 return make_int (bignum_to_long (XBIGNUM_DATA (number)));
|
|
|
497 case BIGNUM_T:
|
|
|
498 return number;
|
|
|
499 case RATIO_T:
|
|
|
500 #ifdef HAVE_RATIO
|
|
|
501 bignum_set_long (scratch_bignum, 1L);
|
|
|
502 return make_ratio_bg (XBIGNUM_DATA (number), scratch_bignum);
|
|
|
503 #else
|
|
2500
|
504 ABORT ();
|
|
1983
|
505 #endif /* HAVE_RATIO */
|
|
|
506 case FLOAT_T:
|
|
|
507 return make_float (bignum_to_double (XBIGNUM_DATA (number)));
|
|
|
508 case BIGFLOAT_T:
|
|
|
509 #ifdef HAVE_BIGFLOAT
|
|
|
510 {
|
|
|
511 Lisp_Object temp;
|
|
|
512 temp = make_bigfloat (0.0, precision);
|
|
|
513 bigfloat_set_bignum (XBIGFLOAT_DATA (temp), XBIGNUM_DATA (number));
|
|
|
514 return temp;
|
|
|
515 }
|
|
|
516 #else
|
|
2500
|
517 ABORT ();
|
|
1983
|
518 #endif /* HAVE_BIGFLOAT */
|
|
|
519 }
|
|
|
520 #else
|
|
2500
|
521 ABORT ();
|
|
1983
|
522 #endif /* HAVE_BIGNUM */
|
|
|
523 case RATIO_T:
|
|
|
524 #ifdef HAVE_RATIO
|
|
|
525 switch (type)
|
|
|
526 {
|
|
|
527 case FIXNUM_T:
|
|
|
528 bignum_div (scratch_bignum, XRATIO_NUMERATOR (number),
|
|
|
529 XRATIO_DENOMINATOR (number));
|
|
|
530 return make_int (bignum_to_long (scratch_bignum));
|
|
|
531 case BIGNUM_T:
|
|
|
532 bignum_div (scratch_bignum, XRATIO_NUMERATOR (number),
|
|
|
533 XRATIO_DENOMINATOR (number));
|
|
|
534 return make_bignum_bg (scratch_bignum);
|
|
|
535 case RATIO_T:
|
|
|
536 return number;
|
|
|
537 case FLOAT_T:
|
|
|
538 return make_float (ratio_to_double (XRATIO_DATA (number)));
|
|
|
539 case BIGFLOAT_T:
|
|
|
540 #ifdef HAVE_BIGFLOAT
|
|
|
541 {
|
|
|
542 Lisp_Object temp;
|
|
|
543 temp = make_bigfloat (0.0, precision);
|
|
|
544 bigfloat_set_ratio (XBIGFLOAT_DATA (temp), XRATIO_DATA (number));
|
|
|
545 return temp;
|
|
|
546 }
|
|
|
547 #else
|
|
2500
|
548 ABORT ();
|
|
1983
|
549 #endif /* HAVE_BIGFLOAT */
|
|
|
550 }
|
|
|
551 #else
|
|
2500
|
552 ABORT ();
|
|
1983
|
553 #endif /* HAVE_RATIO */
|
|
|
554 case FLOAT_T:
|
|
|
555 switch (type)
|
|
|
556 {
|
|
|
557 case FIXNUM_T:
|
|
1995
|
558 return Ftruncate (number);
|
|
1983
|
559 case BIGNUM_T:
|
|
|
560 #ifdef HAVE_BIGNUM
|
|
|
561 bignum_set_double (scratch_bignum, XFLOAT_DATA (number));
|
|
|
562 return make_bignum_bg (scratch_bignum);
|
|
|
563 #else
|
|
2500
|
564 ABORT ();
|
|
1983
|
565 #endif /* HAVE_BIGNUM */
|
|
|
566 case RATIO_T:
|
|
|
567 #ifdef HAVE_RATIO
|
|
|
568 ratio_set_double (scratch_ratio, XFLOAT_DATA (number));
|
|
|
569 return make_ratio_rt (scratch_ratio);
|
|
|
570 #else
|
|
2500
|
571 ABORT ();
|
|
1983
|
572 #endif /* HAVE_RATIO */
|
|
|
573 case FLOAT_T:
|
|
|
574 return number;
|
|
|
575 case BIGFLOAT_T:
|
|
|
576 #ifdef HAVE_BIGFLOAT
|
|
|
577 bigfloat_set_prec (scratch_bigfloat, precision);
|
|
|
578 bigfloat_set_double (scratch_bigfloat, XFLOAT_DATA (number));
|
|
|
579 return make_bigfloat_bf (scratch_bigfloat);
|
|
|
580 #else
|
|
2500
|
581 ABORT ();
|
|
1983
|
582 #endif /* HAVE_BIGFLOAT */
|
|
|
583 }
|
|
|
584 case BIGFLOAT_T:
|
|
|
585 #ifdef HAVE_BIGFLOAT
|
|
|
586 switch (type)
|
|
|
587 {
|
|
|
588 case FIXNUM_T:
|
|
|
589 return make_int (bigfloat_to_long (XBIGFLOAT_DATA (number)));
|
|
|
590 case BIGNUM_T:
|
|
|
591 #ifdef HAVE_BIGNUM
|
|
|
592 bignum_set_bigfloat (scratch_bignum, XBIGFLOAT_DATA (number));
|
|
|
593 return make_bignum_bg (scratch_bignum);
|
|
|
594 #else
|
|
2500
|
595 ABORT ();
|
|
1983
|
596 #endif /* HAVE_BIGNUM */
|
|
|
597 case RATIO_T:
|
|
|
598 #ifdef HAVE_RATIO
|
|
|
599 ratio_set_bigfloat (scratch_ratio, XBIGFLOAT_DATA (number));
|
|
|
600 return make_ratio_rt (scratch_ratio);
|
|
|
601 #else
|
|
2500
|
602 ABORT ();
|
|
1983
|
603 #endif
|
|
|
604 case FLOAT_T:
|
|
|
605 return make_float (bigfloat_to_double (XBIGFLOAT_DATA (number)));
|
|
|
606 case BIGFLOAT_T:
|
|
|
607 /* FIXME: Do we need to change the precision? */
|
|
|
608 return number;
|
|
|
609 }
|
|
|
610 #else
|
|
2500
|
611 ABORT ();
|
|
1983
|
612 #endif /* HAVE_BIGFLOAT */
|
|
|
613 }
|
|
2500
|
614 ABORT ();
|
|
1995
|
615 /* NOTREACHED */
|
|
|
616 return Qzero;
|
|
1983
|
617 }
|
|
|
618
|
|
|
619 /* This function promotes its arguments as necessary to make them both the
|
|
|
620 same type. It destructively modifies its arguments to do so. Characters
|
|
|
621 and markers are ALWAYS converted to integers. */
|
|
|
622 enum number_type
|
|
|
623 promote_args (Lisp_Object *arg1, Lisp_Object *arg2)
|
|
|
624 {
|
|
|
625 enum number_type type1, type2;
|
|
|
626
|
|
|
627 if (CHARP (*arg1))
|
|
|
628 *arg1 = make_int (XCHAR (*arg1));
|
|
|
629 else if (MARKERP (*arg1))
|
|
|
630 *arg1 = make_int (marker_position (*arg1));
|
|
|
631 if (CHARP (*arg2))
|
|
|
632 *arg2 = make_int (XCHAR (*arg2));
|
|
|
633 else if (MARKERP (*arg2))
|
|
|
634 *arg2 = make_int (marker_position (*arg2));
|
|
|
635
|
|
|
636 CHECK_NUMBER (*arg1);
|
|
|
637 CHECK_NUMBER (*arg2);
|
|
|
638
|
|
|
639 type1 = get_number_type (*arg1);
|
|
|
640 type2 = get_number_type (*arg2);
|
|
|
641
|
|
|
642 if (type1 < type2)
|
|
|
643 {
|
|
|
644 *arg1 = internal_coerce_number (*arg1, type2,
|
|
|
645 #ifdef HAVE_BIGFLOAT
|
|
|
646 type2 == BIGFLOAT_T
|
|
|
647 ? XBIGFLOAT_GET_PREC (*arg2) :
|
|
|
648 #endif
|
|
|
649 0UL);
|
|
|
650 return type2;
|
|
|
651 }
|
|
|
652
|
|
|
653 if (type2 < type1)
|
|
|
654 {
|
|
|
655 *arg2 = internal_coerce_number (*arg2, type1,
|
|
|
656 #ifdef HAVE_BIGFLOAT
|
|
|
657 type1 == BIGFLOAT_T
|
|
|
658 ? XBIGFLOAT_GET_PREC (*arg1) :
|
|
|
659 #endif
|
|
|
660 0UL);
|
|
|
661 return type1;
|
|
|
662 }
|
|
|
663
|
|
|
664 /* No conversion necessary */
|
|
|
665 return type1;
|
|
|
666 }
|
|
|
667
|
|
|
668 DEFUN ("coerce-number", Fcoerce_number, 2, 3, 0, /*
|
|
|
669 Convert NUMBER to the indicated type, possibly losing information.
|
|
|
670 Do not call this function. Use `coerce' instead.
|
|
|
671
|
|
|
672 TYPE is one of the symbols 'fixnum, 'integer, 'ratio, 'float, or 'bigfloat.
|
|
|
673 Not all of these types may be supported.
|
|
|
674
|
|
|
675 PRECISION is the number of bits of precision to use when converting to
|
|
|
676 bigfloat; it is ignored otherwise. If nil, the default precision is used.
|
|
|
677
|
|
|
678 Note that some conversions lose information. No error is signaled in such
|
|
|
679 cases; the information is silently lost.
|
|
|
680 */
|
|
2286
|
681 (number, type,
|
|
|
682 #ifdef HAVE_BIGFLOAT
|
|
|
683 precision
|
|
|
684 #else
|
|
|
685 UNUSED (precision)
|
|
|
686 #endif
|
|
|
687 ))
|
|
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.
|
|
|
815 */);
|
|
|
816 Vmost_negative_fixnum = EMACS_INT_MIN;
|
|
|
817
|
|
|
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
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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
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835 void
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836 init_number (void)
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837 {
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838 if (!number_initialized)
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839 {
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840 number_initialized = 1;
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841
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842 #ifdef WITH_GMP
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843 init_number_gmp ();
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844 #endif
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845 #ifdef WITH_MP
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846 init_number_mp ();
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847 #endif
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848
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849 #ifdef HAVE_BIGNUM
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850 bignum_init (scratch_bignum);
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851 bignum_init (scratch_bignum2);
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852 #endif
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853
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854 #ifdef HAVE_RATIO
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855 ratio_init (scratch_ratio);
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856 #endif
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857
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858 #ifdef HAVE_BIGFLOAT
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859 bigfloat_init (scratch_bigfloat);
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|
860 bigfloat_init (scratch_bigfloat2);
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861 #endif
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862 }
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863 }
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