1 | [[tags: egg]] |
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2 | |
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3 | == err5rs-arithmetic |
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4 | |
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5 | [[toc:]] |
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6 | |
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7 | |
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8 | == Documentation |
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9 | |
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10 | ERR5RS arithmetic routines. |
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11 | |
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12 | See [[http://scheme-punks.cyber-rush.org/wiki/index.php?title=ERR5RS:SRFIs_and_Standard_Libraries|ERR5RS:SRFIs_and_Standard_Libraries]] |
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13 | |
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14 | |
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15 | === Fixnum Arithmetic |
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16 | |
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17 | ERR5RS fixnum functions. |
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18 | |
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19 | See [[http://www.r6rs.org/final/html/r6rs-lib/r6rs-lib-Z-H-12.html#node_sec_11.2|Fixnums]] |
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20 | |
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21 | ==== fixnum-width |
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22 | |
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23 | <procedure>(fixnum-width) => FIXNUM</procedure> |
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24 | |
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25 | ==== least-fixnum |
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26 | |
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27 | <procedure>(least-fixnum) => FIXNUM</procedure> |
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28 | |
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29 | ==== greatest-fixnum |
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30 | |
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31 | <procedure>(greatest-fixnum) => FIXNUM</procedure> |
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32 | |
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33 | ==== fx=? |
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34 | |
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35 | <procedure>(fx=? FX ...) => BOOLEAN</procedure> |
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36 | |
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37 | ==== fx<? |
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38 | |
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39 | <procedure>(fx<? FX ...) => BOOLEAN</procedure> |
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40 | |
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41 | ==== fx>? |
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42 | |
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43 | <procedure>(fx>? FX ...) => BOOLEAN</procedure> |
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44 | |
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45 | ==== fx<=? |
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46 | |
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47 | <procedure>(fx<=? FX ...) => BOOLEAN</procedure> |
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48 | |
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49 | ==== fx>=? |
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50 | |
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51 | <procedure>(fx>=? FX ...) => BOOLEAN</procedure> |
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52 | |
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53 | ==== fxcompare |
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54 | |
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55 | <procedure>(fxcompare FX1 FX2) => BOOLEAN</procedure> |
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56 | |
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57 | ==== fxzero? |
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58 | |
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59 | <procedure>(fxzero? FX) => BOOLEAN</procedure> |
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60 | |
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61 | ==== fxpositive? |
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62 | |
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63 | <procedure>(fxpositive? FX) => BOOLEAN</procedure> |
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64 | |
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65 | ==== fxnegative? |
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66 | |
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67 | <procedure>(fxnegative? FX) => BOOLEAN</procedure> |
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68 | |
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69 | ==== fxodd? |
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70 | |
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71 | <procedure>(fxodd? FX) => BOOLEAN</procedure> |
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72 | |
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73 | ==== fxeven? |
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74 | |
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75 | <procedure>(fxeven? FX) => BOOLEAN</procedure> |
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76 | |
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77 | ==== fxmax |
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78 | |
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79 | <procedure>(fxmax FX ...) => FIXNUM</procedure> |
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80 | |
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81 | ==== fxmin |
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82 | |
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83 | <procedure>(fxmin FX ...) => FIXNUM</procedure> |
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84 | |
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85 | ==== fxmax-and-min |
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86 | |
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87 | <procedure>(fxmax-and-min FX ...) => FIXNUM</procedure> |
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88 | |
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89 | ==== fxmodulo |
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90 | |
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91 | <procedure>(fxmodulo FX-N FX-D) => FIXNUM</procedure> |
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92 | |
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93 | ==== fxabs |
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94 | |
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95 | <procedure>(fxabs FX) => FIXNUM</procedure> |
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96 | |
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97 | ==== fxpow2log2 |
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98 | |
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99 | <procedure>(fxpow2log2 FX) => FIXNUM</procedure> |
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100 | |
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101 | ==== fxdiv |
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102 | |
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103 | <procedure>(fxdiv FX-N FX-D) => FIXNUM</procedure> |
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104 | |
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105 | ==== fxdiv-and-mod |
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106 | |
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107 | <procedure>(fxdiv-and-mod FX-N FX-D) => FIXNUM</procedure> |
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108 | |
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109 | ==== fxdiv0 |
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110 | |
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111 | <procedure>(fxdiv0 FX-N FX-D) => FIXNUM</procedure> |
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112 | |
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113 | ==== fxmod0 |
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114 | |
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115 | <procedure>(fxmod0 FX-N FX-D) => FIXNUM</procedure> |
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116 | |
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117 | ==== fxdiv0-and-mod0 |
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118 | |
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119 | <procedure>(fxdiv0-and-mod0 FX-N FX-D) => FIXNUM</procedure> |
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120 | |
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121 | ==== fx*/carry |
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122 | |
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123 | <procedure>(fx*/carry FX1 FX2 FX3) => FIXNUM</procedure> |
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124 | |
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125 | ==== fx+/carry |
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126 | |
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127 | <procedure>(fx+/carry FX1 FX2 FX3) => FIXNUM</procedure> |
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128 | |
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129 | ==== fx-/carry |
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130 | |
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131 | <procedure>(fx-/carry FX1 FX2 FX3) => FIXNUM</procedure> |
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132 | |
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133 | ==== fxadd1 |
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134 | |
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135 | <procedure>(fxadd1 FX) => FIXNUM</procedure> |
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136 | |
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137 | ==== fxsub1 |
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138 | |
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139 | <procedure>(fxsub1 FX) => FIXNUM</procedure> |
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140 | |
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141 | ==== fxquotient |
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142 | |
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143 | <procedure>(fxquotient FX-N FX-D) => FIXNUM</procedure> |
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144 | |
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145 | ==== fxremainder |
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146 | |
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147 | <procedure>(fxremainder FX-N FX-D) => FIXNUM</procedure> |
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148 | |
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149 | ==== fxarithmetic-shift |
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150 | |
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151 | <procedure>(fxarithmetic-shift FX DIRECTIONAL-AMOUNT) => FIXNUM</procedure> |
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152 | |
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153 | ==== fxarithmetic-shift-left |
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154 | |
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155 | <procedure>(fxarithmetic-shift-left FX AMOUNT) => FIXNUM</procedure> |
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156 | |
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157 | ==== fxarithmetic-shift-right |
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158 | |
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159 | <procedure>(fxarithmetic-shift-right FX AMOUNT) => FIXNUM</procedure> |
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160 | |
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161 | ==== fx- |
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162 | |
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163 | <procedure>(fx- FX [FX2]) => FIXNUM</procedure> |
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164 | |
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165 | ==== fxand |
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166 | |
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167 | <procedure>(fxand FX ...) => FIXNUM</procedure> |
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168 | |
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169 | ==== fxior |
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170 | |
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171 | <procedure>(fxior FX ...) => FIXNUM</procedure> |
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172 | |
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173 | ==== fxxor |
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174 | |
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175 | <procedure>(fxxor FX ...) => FIXNUM</procedure> |
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176 | |
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177 | ==== fxif |
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178 | |
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179 | <procedure>(fxif MASK TRUE FALSE) => FIXNUM</procedure> |
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180 | |
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181 | ==== fxbit-count |
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182 | |
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183 | <procedure>(fxbit-count FX) => FIXNUM</procedure> |
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184 | |
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185 | ==== fxlength |
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186 | |
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187 | <procedure>(fxlength FX) => FIXNUM</procedure> |
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188 | |
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189 | ==== fxfirst-bit-set |
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190 | |
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191 | <procedure>(fxfirst-bit-set FX) => FIXNUM</procedure> |
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192 | |
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193 | ==== fxlast-bit-set |
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194 | |
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195 | <procedure>(fxlast-bit-set FX) => FIXNUM</procedure> |
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196 | |
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197 | ==== fxbit-set? |
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198 | |
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199 | <procedure>(fxbit-set? FX INDEX) => BOOLEAN</procedure> |
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200 | |
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201 | ==== fxcopy-bit |
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202 | |
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203 | <procedure>(fxcopy-bit FX INDEX BIT) => FIXNUM</procedure> |
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204 | |
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205 | ==== fxbit-field |
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206 | |
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207 | <procedure>(fxbit-field FX START END) => FIXNUM</procedure> |
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208 | |
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209 | ==== fxcopy-bit-field |
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210 | |
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211 | <procedure>(fxcopy-bit-field FX-TO START END FX-FROM) => FIXNUM</procedure> |
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212 | |
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213 | ==== fxrotate-bit-field |
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214 | |
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215 | <procedure>(fxrotate-bit-field FX START END COUNT) => FIXNUM</procedure> |
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216 | |
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217 | ==== fxreverse-bit-field |
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218 | |
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219 | <procedure>(fxreverse-bit-field FX START END) => FIXNUM</procedure> |
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220 | |
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221 | ==== Extras |
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222 | |
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223 | ===== fixnum->string |
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224 | |
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225 | <procedure>(fixnum->string FX [RADIX]) => STRING</procedure> |
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226 | |
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227 | ===== fxif-not |
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228 | |
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229 | <procedure>(fxif-not MASK TRUE FALSE) => FIXNUM</procedure> |
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230 | |
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231 | ===== fxnegate |
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232 | |
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233 | <procedure>(fxnegate FX) => FIXNUM</procedure> |
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234 | |
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235 | ===== fxpow2log2 |
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236 | |
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237 | <procedure>(fxpow2log2 FX) => FIXNUM</procedure> |
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238 | |
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239 | ===== fx-# |
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240 | |
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241 | <procedure>(fx-# FX [FX1 ...]) => FIXNUM</procedure> |
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242 | |
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243 | ===== fx+# |
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244 | |
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245 | <procedure>(fx+# FX [FX1 ...]) => FIXNUM</procedure> |
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246 | |
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247 | ===== fx*# |
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248 | |
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249 | <procedure>(fx*# FX [FX1 ...]) => FIXNUM</procedure> |
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250 | |
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251 | ===== fx/# |
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252 | |
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253 | <procedure>(fx/# FX [FX1 ...]) => FIXNUM</procedure> |
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254 | |
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255 | |
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256 | === Flonum Arithmetic |
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257 | |
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258 | ERR5RS flonum functions. |
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259 | |
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260 | See [[http://www.r6rs.org/final/html/r6rs-lib/r6rs-lib-Z-H-12.html#node_sec_11.3|Flonums]] |
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261 | |
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262 | ==== real->flonum |
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263 | |
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264 | <procedure>(real->flonum NUMBER) => FLONUM</procedure> |
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265 | |
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266 | ==== fixnum->flonum |
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267 | |
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268 | <procedure>(fixnum->flonum FX) => FLONUM</procedure> |
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269 | |
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270 | ==== fl=? |
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271 | |
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272 | <procedure>(fl=? FL ...) => BOOLEAN</procedure> |
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273 | |
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274 | ==== fl<? |
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275 | |
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276 | <procedure>(fl<? FL ...) => BOOLEAN</procedure> |
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277 | |
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278 | ==== fl>? |
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279 | |
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280 | <procedure>(fl>? FL ...) => BOOLEAN</procedure> |
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281 | |
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282 | ==== fl<=? |
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283 | |
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284 | <procedure>(fl<=? FL ...) => BOOLEAN</procedure> |
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285 | |
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286 | ==== fl>=? |
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287 | |
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288 | <procedure>(fl>=? FL ...) => BOOLEAN</procedure> |
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289 | |
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290 | ==== flcompare |
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291 | |
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292 | <procedure>(flcompare FL1 FL2) => BOOLEAN</procedure> |
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293 | |
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294 | ==== flinteger? |
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295 | |
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296 | <procedure>(flinteger? FL) => BOOLEAN</procedure> |
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297 | |
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298 | ==== flzero? |
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299 | |
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300 | <procedure>(flzero? FL) => BOOLEAN</procedure> |
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301 | |
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302 | ==== flpositive? |
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303 | |
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304 | <procedure>(flpositive? FL) => BOOLEAN</procedure> |
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305 | |
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306 | ==== flnegative? |
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307 | |
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308 | <procedure>(flnegative? FL) => BOOLEAN</procedure> |
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309 | |
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310 | ==== flodd? |
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311 | |
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312 | <procedure>(flodd? FL) => BOOLEAN</procedure> |
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313 | |
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314 | ==== fleven? |
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315 | |
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316 | <procedure>(fleven? FL) => BOOLEAN</procedure> |
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317 | |
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318 | ==== flfinite? |
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319 | |
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320 | <procedure>(flfinite? FL) => BOOLEAN</procedure> |
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321 | |
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322 | ==== flinfinite? |
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323 | |
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324 | <procedure>(flinfinite? FL) => BOOLEAN</procedure> |
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325 | |
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326 | ==== flnan? |
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327 | |
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328 | <procedure>(flnan? FL) => BOOLEAN</procedure> |
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329 | |
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330 | ==== fl+ |
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331 | |
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332 | <procedure>(fl+ FL ...) => FLONUM</procedure> |
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333 | |
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334 | ==== fl* |
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335 | |
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336 | <procedure>(fl* FL ...) => FLONUM</procedure> |
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337 | |
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338 | ==== fl- |
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339 | |
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340 | <procedure>(fl- FL ...) => FLONUM</procedure> |
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341 | |
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342 | ==== fl/ |
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343 | |
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344 | <procedure>(fl/ FL ...) => FLONUM</procedure> |
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345 | |
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346 | ==== flmax |
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347 | |
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348 | <procedure>(flmax FL ...) => FLONUM</procedure> |
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349 | |
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350 | ==== flmin |
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351 | |
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352 | <procedure>(flmin FL ...) => FLONUM</procedure> |
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353 | |
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354 | ==== flmax-and-min |
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355 | |
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356 | <procedure>(flmax-and-min FL ...) => FLONUM</procedure> |
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357 | |
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358 | ==== flabs |
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359 | |
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360 | <procedure>(flabs FL) => FLONUM</procedure> |
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361 | |
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362 | ==== flfraction |
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363 | |
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364 | <procedure>(flfraction FL) => FLONUM</procedure> |
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365 | |
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366 | ==== fltruncate |
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367 | |
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368 | <procedure>(fltruncate FL) => FLONUM</procedure> |
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369 | |
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370 | ==== flfloor |
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371 | |
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372 | <procedure>(flfloor FL) => FLONUM</procedure> |
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373 | |
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374 | ==== flceiling |
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375 | |
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376 | <procedure>(flceiling FL) => FLONUM</procedure> |
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377 | |
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378 | ==== flround |
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379 | |
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380 | <procedure>(flround FL) => FLONUM</procedure> |
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381 | |
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382 | ==== fldiv |
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383 | |
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384 | <procedure>(fldiv FL-N FL-D) => FLONUM</procedure> |
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385 | |
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386 | ==== flmod |
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387 | |
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388 | <procedure>(flmod FL-N FL-D) => FLONUM</procedure> |
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389 | |
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390 | ==== fldiv-and-mod |
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391 | |
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392 | <procedure>(fldiv-and-mod FL-N FL-D) => FLONUM</procedure> |
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393 | |
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394 | ==== fldiv0 |
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395 | |
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396 | <procedure>(fldiv0 FL-N FL-D) => FLONUM</procedure> |
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397 | |
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398 | ==== flmod0 |
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399 | |
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400 | <procedure>(flmod0 FL-N FL-D) => FLONUM</procedure> |
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401 | |
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402 | ==== fldiv0-and-mod0 |
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403 | |
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404 | <procedure>(fldiv0-and-mod0 FL-N FL-D) => FLONUM</procedure> |
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405 | |
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406 | ==== flexp |
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407 | |
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408 | <procedure>(flexp FL) => FLONUM</procedure> |
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409 | |
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410 | ==== fllog |
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411 | |
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412 | <procedure>(fllog FL [BASE]) => FLONUM</procedure> |
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413 | |
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414 | ==== flsin |
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415 | |
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416 | <procedure>(flsin FL) => FLONUM</procedure> |
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417 | |
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418 | ==== flcos |
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419 | |
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420 | <procedure>(flcos FL) => FLONUM</procedure> |
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421 | |
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422 | ==== fltan |
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423 | |
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424 | <procedure>(fltan FL) => FLONUM</procedure> |
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425 | |
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426 | ==== flasin |
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427 | |
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428 | <procedure>(flasin FL) => FLONUM</procedure> |
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429 | |
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430 | ==== flacos |
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431 | |
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432 | <procedure>(flacos FL) => FLONUM</procedure> |
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433 | |
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434 | ==== flatan |
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435 | |
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436 | <procedure>(flatan FL [FL2]) => FLONUM</procedure> |
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437 | |
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438 | ==== flsqrt |
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439 | |
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440 | <procedure>(flsqrt FL) => FLONUM</procedure> |
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441 | |
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442 | ==== flexpt |
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443 | |
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444 | <procedure>(flexpt FL EXP) => FLONUM</procedure> |
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445 | |
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446 | ==== flnumerator |
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447 | |
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448 | <procedure>(flnumerator FL) => FLONUM</procedure> |
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449 | |
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450 | ==== fldenominator |
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451 | |
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452 | <procedure>(fldenominator FL) => FLONUM</procedure> |
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453 | |
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454 | |
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455 | === Bitwise Arithmetic |
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456 | |
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457 | ERR5RS bitwise functions. |
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458 | |
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459 | See [[http://www.r6rs.org/final/html/r6rs-lib/r6rs-lib-Z-H-12.html#node_sec_11.1|Exact bitwise arithmetic]] |
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460 | |
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461 | ==== bitwise-if |
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462 | |
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463 | <procedure>(bitwise-if MASK TRUE FALSE) => INTEGER</procedure> |
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464 | |
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465 | ==== bitwise-test? |
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466 | |
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467 | <procedure>(bitwise-test? VALUE1 VALUE2) => BOOLEAN</procedure> |
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468 | |
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469 | ==== bitwise-bit-count |
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470 | |
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471 | <procedure>(bitwise-bit-count VALUE) => INTEGER</procedure> |
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472 | |
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473 | ==== bitwise-length |
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474 | |
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475 | <procedure>(bitwise-length VALUE) => INTEGER</procedure> |
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476 | |
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477 | ==== bitwise-first-bit-set |
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478 | |
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479 | <procedure>(bitwise-first-bit-set VALUE) => INTEGER</procedure> |
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480 | |
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481 | ==== bitwise-last-bit-set |
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482 | |
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483 | <procedure>(bitwise-last-bit-set VALUE) => INTEGER</procedure> |
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484 | |
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485 | ==== bitwise-bit-set? |
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486 | |
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487 | <procedure>(bitwise-bit-set? VALUE INDEX) => BOOLEAN</procedure> |
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488 | |
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489 | ==== bitwise-copy-bit |
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490 | |
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491 | <procedure>(bitwise-copy-bit TO START BIT) => INTEGER</procedure> |
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492 | |
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493 | ==== bitwise-bit-field |
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494 | |
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495 | <procedure>(bitwise-bit-field VALUE START END) => INTEGER</procedure> |
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496 | |
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497 | ==== bitwise-copy-bit-field |
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498 | |
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499 | <procedure>(bitwise-copy-bit-field TO START END FROM) => INTEGER</procedure> |
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500 | |
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501 | ==== bitwise-rotate-bit-field |
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502 | |
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503 | <procedure>(bitwise-rotate-bit-field VALUE START END COUNT) => INTEGER</procedure> |
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504 | |
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505 | ==== bitwise-reverse |
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506 | |
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507 | <procedure>(bitwise-reverse VALUE COUNT) => INTEGER</procedure> |
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508 | |
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509 | ==== bitwise-reverse-bit-field |
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510 | |
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511 | <procedure>(bitwise-reverse-bit-field VALUE START END) => INTEGER</procedure> |
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512 | |
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513 | ==== bitwise-list->integer |
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514 | |
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515 | <procedure>(bitwise-list->integer LIST) => INTEGER</procedure> |
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516 | |
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517 | ==== bitwise-integer->list |
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518 | |
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519 | <procedure>(bitwise-integer->list VALUE [LENGTH]) => LIST</procedure> |
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520 | |
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521 | ==== bitwise-arithmetic-shift |
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522 | |
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523 | <procedure>(bitwise-arithmetic-shift VALUE DIRECTIONAL-COUNT) => INTEGER</procedure> |
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524 | |
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525 | ==== bitwise-arithmetic-shift-left |
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526 | |
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527 | <procedure>(bitwise-arithmetic-shift-left VALUE COUNT) => INTEGER</procedure> |
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528 | |
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529 | ==== bitwise-arithmetic-shift-right |
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530 | |
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531 | <procedure>(bitwise-arithmetic-shift-right VALUE COUNT) => INTEGER</procedure> |
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532 | |
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533 | ==== Extras |
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534 | |
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535 | ===== bitwise-if-not |
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536 | |
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537 | <procedure>(bitwise-if-not MASK TRUE FALSE) => INTEGER</procedure> |
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538 | |
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539 | Merge under not mask. |
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540 | |
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541 | ===== pow2log2 |
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542 | |
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543 | <procedure>(pow2log2 VALUE) => INTEGER</procedure> |
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544 | |
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545 | Returns {{(* 2 (log2 VALUE))}}, but more efficient. |
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546 | |
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547 | ===== boolean->bit |
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548 | |
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549 | <procedure>(boolean->bit OBJECT) => INTEGER</procedure> |
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550 | |
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551 | Returns {{0}} for {{#f}} or {{0}} and {{1}} otherwise. |
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552 | |
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553 | ==== Unchecked variants |
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554 | |
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555 | These procedures have the same signature as the similarly named ones but |
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556 | perform no argument checking. |
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557 | |
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558 | ===== *bitwise-if |
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559 | ===== *bitwise-if-not |
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560 | ===== *bitwise-test? |
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561 | ===== *bitwise-bit-count |
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562 | ===== *bitwise-length |
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563 | ===== *bitwise-first-bit-set |
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564 | ===== *bitwise-last-bit-set |
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565 | ===== *bitwise-bit-set? |
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566 | ===== *bitwise-copy-bit |
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567 | ===== *bitwise-bit-field |
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568 | ===== *bitwise-copy-bit-field |
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569 | ===== *bitwise-rotate-bit-field |
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570 | ===== *bitwise-reverse |
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571 | ===== *bitwise-reverse-bit-field |
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572 | ===== *bitwise-reverse-bit-field |
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573 | ===== *bitwise-list->integer |
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574 | ===== *bitwise-integer->list |
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575 | ===== *bitwise-arithmetic-shift |
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576 | ===== *bitwise-arithmetic-shift-left |
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577 | ===== *bitwise-arithmetic-shift-right |
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578 | ===== *pow2log2 |
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579 | |
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580 | |
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581 | == Usage |
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582 | |
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583 | |
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584 | === Fixnum Arithmetic |
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585 | |
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586 | <enscript language=scheme> |
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587 | (require-library err5rs-arithmetic-fixnum) |
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588 | ... |
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589 | (import err5rs-arithmetic) |
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590 | </enscript> |
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591 | |
---|
592 | or |
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593 | |
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594 | <enscript language=scheme> |
---|
595 | (require-extension err5rs-arithmetic-fixnum) |
---|
596 | </enscript> |
---|
597 | |
---|
598 | |
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599 | === Flonum Arithmetic |
---|
600 | |
---|
601 | <enscript language=scheme> |
---|
602 | (require-library err5rs-arithmetic-fixnum) |
---|
603 | ... |
---|
604 | (import err5rs-arithmetic) |
---|
605 | </enscript> |
---|
606 | |
---|
607 | or |
---|
608 | |
---|
609 | <enscript language=scheme> |
---|
610 | (require-extension err5rs-arithmetic-fixnum) |
---|
611 | </enscript> |
---|
612 | |
---|
613 | |
---|
614 | === Bitwise Arithmetic |
---|
615 | |
---|
616 | <enscript language=scheme> |
---|
617 | (require-library err5rs-arithmetic-fixnum) |
---|
618 | ... |
---|
619 | (import err5rs-arithmetic) |
---|
620 | </enscript> |
---|
621 | |
---|
622 | or |
---|
623 | |
---|
624 | <enscript language=scheme> |
---|
625 | (require-extension err5rs-arithmetic-fixnum) |
---|
626 | </enscript> |
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627 | |
---|
628 | |
---|
629 | == Examples |
---|
630 | |
---|
631 | |
---|
632 | == Notes |
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633 | |
---|
634 | |
---|
635 | == Requirements |
---|
636 | |
---|
637 | |
---|
638 | == Bugs and Limitations |
---|
639 | |
---|
640 | * No ERR5RS full-numeric-tower arithmetic routines. |
---|
641 | |
---|
642 | |
---|
643 | == Author |
---|
644 | |
---|
645 | [[kon lovett]] |
---|
646 | |
---|
647 | |
---|
648 | == Version history |
---|
649 | |
---|
650 | ; 1.0.0 : Chicken 4 release. |
---|
651 | |
---|
652 | |
---|
653 | == License |
---|
654 | |
---|
655 | Copyright (C) 2009 Kon Lovett. All rights reserved. |
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656 | |
---|
657 | Permission is hereby granted, free of charge, to any person obtaining a |
---|
658 | copy of this software and associated documentation files (the Software), |
---|
659 | to deal in the Software without restriction, including without limitation |
---|
660 | the rights to use, copy, modify, merge, publish, distribute, sublicense, |
---|
661 | and/or sell copies of the Software, and to permit persons to whom the |
---|
662 | Software is furnished to do so, subject to the following conditions: |
---|
663 | |
---|
664 | The above copyright notice and this permission notice shall be included |
---|
665 | in all copies or substantial portions of the Software. |
---|
666 | |
---|
667 | THE SOFTWARE IS PROVIDED ASIS, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
---|
668 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
---|
669 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
---|
670 | THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
---|
671 | OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
---|
672 | ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
---|
673 | OTHER DEALINGS IN THE SOFTWARE. |
---|