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| 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
| 2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
| 3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
| 4 | 4 |
| 5 // TODO(srdjan): fix limitations. | 5 // TODO(srdjan): fix limitations. |
| 6 // - shift amount must be a Smi. | 6 // - shift amount must be a Smi. |
| 7 class IntegerImplementation { | 7 class IntegerImplementation { |
| 8 factory IntegerImplementation._uninstantiable() { | 8 factory IntegerImplementation._uninstantiable() { |
| 9 throw const UnsupportedOperationException( | 9 throw const UnsupportedOperationException( |
| 10 "IntegerImplementation can only be allocated by the VM"); | 10 "IntegerImplementation can only be allocated by the VM"); |
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| 53 int bitXorFromInteger(int other) native "Integer_bitXorFromInteger"; | 53 int bitXorFromInteger(int other) native "Integer_bitXorFromInteger"; |
| 54 int addFromInteger(int other) native "Integer_addFromInteger"; | 54 int addFromInteger(int other) native "Integer_addFromInteger"; |
| 55 int subFromInteger(int other) native "Integer_subFromInteger"; | 55 int subFromInteger(int other) native "Integer_subFromInteger"; |
| 56 int mulFromInteger(int other) native "Integer_mulFromInteger"; | 56 int mulFromInteger(int other) native "Integer_mulFromInteger"; |
| 57 int truncDivFromInteger(int other) native "Integer_truncDivFromInteger"; | 57 int truncDivFromInteger(int other) native "Integer_truncDivFromInteger"; |
| 58 int moduloFromInteger(int other) native "Integer_moduloFromInteger"; | 58 int moduloFromInteger(int other) native "Integer_moduloFromInteger"; |
| 59 int remainderFromInteger(int other) { | 59 int remainderFromInteger(int other) { |
| 60 return other - (other ~/ this) * this; | 60 return other - (other ~/ this) * this; |
| 61 } | 61 } |
| 62 int operator >>(int other) { | 62 int operator >>(int other) { |
| 63 return other.sarFromInt(this); | 63 return other.shrFromInt(this); |
| 64 } | 64 } |
| 65 int operator <<(int other) { | 65 int operator <<(int other) { |
| 66 return other.shlFromInt(this); | 66 return other.shlFromInt(this); |
| 67 } | 67 } |
| 68 bool operator <(num other) { | 68 bool operator <(num other) { |
| 69 return other > this; | 69 return other > this; |
| 70 } | 70 } |
| 71 bool operator >(num other) { | 71 bool operator >(num other) { |
| 72 return other.greaterThanFromInteger(this); | 72 return other.greaterThanFromInteger(this); |
| 73 } | 73 } |
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| 161 | 161 |
| 162 class Smi extends IntegerImplementation implements int { | 162 class Smi extends IntegerImplementation implements int { |
| 163 factory Smi._uninstantiable() { | 163 factory Smi._uninstantiable() { |
| 164 throw const UnsupportedOperationException( | 164 throw const UnsupportedOperationException( |
| 165 "Smi can only be allocated by the VM"); | 165 "Smi can only be allocated by the VM"); |
| 166 } | 166 } |
| 167 int hashCode() { | 167 int hashCode() { |
| 168 return this; | 168 return this; |
| 169 } | 169 } |
| 170 int operator ~() native "Smi_bitNegate"; | 170 int operator ~() native "Smi_bitNegate"; |
| 171 int sarFromInt(int other) native "Smi_sarFromInt"; | 171 int shrFromInt(int other) native "Smi_shrFromInt"; |
| 172 int shlFromInt(int other) native "Smi_shlFromInt"; | 172 int shlFromInt(int other) native "Smi_shlFromInt"; |
| 173 } | 173 } |
| 174 | 174 |
| 175 // Represents integers that cannot be represented by Smi but fit into 64bits. | 175 // Represents integers that cannot be represented by Smi but fit into 64bits. |
| 176 class Mint extends IntegerImplementation implements int { | 176 class Mint extends IntegerImplementation implements int { |
| 177 factory Mint._uninstantiable() { | 177 factory Mint._uninstantiable() { |
| 178 throw const UnsupportedOperationException( | 178 throw const UnsupportedOperationException( |
| 179 "Mint can only be allocated by the VM"); | 179 "Mint can only be allocated by the VM"); |
| 180 } | 180 } |
| 181 int hashCode() { | 181 int hashCode() { |
| 182 return this; | 182 return this; |
| 183 } | 183 } |
| 184 int operator ~() native "Mint_bitNegate"; | 184 int operator ~() native "Mint_bitNegate"; |
| 185 | 185 |
| 186 // Shift by mint exceeds range that can be handled by the VM. | 186 // Shift by mint exceeds range that can be handled by the VM. |
| 187 int sarFromInt(int other) { | 187 int shrFromInt(int other) { |
| 188 if (other < 0) { | 188 if (other < 0) { |
| 189 return -1; | 189 return -1; |
| 190 } else { | 190 } else { |
| 191 return 0; | 191 return 0; |
| 192 } | 192 } |
| 193 } | 193 } |
| 194 int shlFromInt(int other) { | 194 int shlFromInt(int other) { |
| 195 throw const OutOfMemoryException(); | 195 throw const OutOfMemoryException(); |
| 196 } | 196 } |
| 197 } | 197 } |
| 198 | 198 |
| 199 // A number that can be represented as Smi or Mint will never be represented as | 199 // A number that can be represented as Smi or Mint will never be represented as |
| 200 // Bigint. | 200 // Bigint. |
| 201 class Bigint extends IntegerImplementation implements int { | 201 class Bigint extends IntegerImplementation implements int { |
| 202 factory Bigint._uninstantiable() { | 202 factory Bigint._uninstantiable() { |
| 203 throw const UnsupportedOperationException( | 203 throw const UnsupportedOperationException( |
| 204 "Bigint can only be allocated by the VM"); | 204 "Bigint can only be allocated by the VM"); |
| 205 } | 205 } |
| 206 int hashCode() { | 206 int hashCode() { |
| 207 return this; | 207 return this; |
| 208 } | 208 } |
| 209 int operator ~() native "Bigint_bitNegate"; | 209 int operator ~() native "Bigint_bitNegate"; |
| 210 | 210 |
| 211 // Shift by bigint exceeds range that can be handled by the VM. | 211 // Shift by bigint exceeds range that can be handled by the VM. |
| 212 int sarFromInt(int other) { | 212 int shrFromInt(int other) { |
| 213 if (other < 0) { | 213 if (other < 0) { |
| 214 return -1; | 214 return -1; |
| 215 } else { | 215 } else { |
| 216 return 0; | 216 return 0; |
| 217 } | 217 } |
| 218 } | 218 } |
| 219 int shlFromInt(int other) { | 219 int shlFromInt(int other) { |
| 220 throw const OutOfMemoryException(); | 220 throw const OutOfMemoryException(); |
| 221 } | 221 } |
| 222 } | 222 } |
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