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