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Convert to use Apache License, Version 2.0

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commit 25562dd7ed2d9b05983454ecaa3d5d3ff3e421aa 1 parent 38e73f4
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24 COPYRIGHT
@@ -1,24 +0,0 @@
-Copyright (c) 2008 Robert Virding. All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions
-are met:
-
-1. Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
-2. Redistributions in binary form must reproduce the above copyright
- notice, this list of conditions and the following disclaimer in the
- documentation and/or other materials provided with the distribution.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
-FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
-INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
-BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
-ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-POSSIBILITY OF SUCH DAMAGE.
View
202 LICENSE
@@ -0,0 +1,202 @@
+
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+
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View
59 src/erlog.erl
@@ -1,41 +1,30 @@
-%% Copyright (c) 2009 Robert Virding. All rights reserved.
+%% Copyright (c) 2008-2013 Robert Virding
%%
-%% Redistribution and use in source and binary forms, with or without
-%% modification, are permitted provided that the following conditions
-%% are met:
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
%%
-%% 1. Redistributions of source code must retain the above copyright
-%% notice, this list of conditions and the following disclaimer.
-%% 2. Redistributions in binary form must reproduce the above copyright
-%% notice, this list of conditions and the following disclaimer in the
-%% documentation and/or other materials provided with the distribution.
+%% http://www.apache.org/licenses/LICENSE-2.0
%%
-%% THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-%% "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-%% LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
-%% FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-%% COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
-%% INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
-%% BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-%% LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-%% CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-%% LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
-%% ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-%% POSSIBILITY OF SUCH DAMAGE.
-
-%%% File : erlog.erl
-%%% Author : Robert Virding
-%%% Purpose : Main interface to the Erlog interpreter.
-%%%
-%%% Structures - {Functor,arg1, Arg2,...} where Functor is an atom
-%%% Variables - {Name} where Name is an atom or integer
-%%% Lists - Erlang lists
-%%% Atomic - Erlang constants
-%%%
-%%% There is no problem with the representation of variables as Prolog
-%%% functors of arity 0 are atoms. This representation is much easier
-%%% to test for, and create new variables with than using funny atom
-%%% names like '$1' (yuch!), and we need LOTS of variables.
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+
+%% File : erlog.erl
+%% Author : Robert Virding
+%% Purpose : Main interface to the Erlog interpreter.
+%%
+%% Structures - {Functor,arg1, Arg2,...} where Functor is an atom
+%% Variables - {Name} where Name is an atom or integer
+%% Lists - Erlang lists
+%% Atomic - Erlang constants
+%%
+%% There is no problem with the representation of variables as Prolog
+%% functors of arity 0 are atoms. This representation is much easier
+%% to test for, and create new variables with than using funny atom
+%% names like '$1' (yuch!), and we need LOTS of variables.
-module(erlog).
View
55 src/erlog_boot.erl
@@ -1,41 +1,30 @@
-%% Copyright (c) 2008 Robert Virding. All rights reserved.
+%% Copyright (c) 2008-2013 Robert Virding
%%
-%% Redistribution and use in source and binary forms, with or without
-%% modification, are permitted provided that the following conditions
-%% are met:
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
%%
-%% 1. Redistributions of source code must retain the above copyright
-%% notice, this list of conditions and the following disclaimer.
-%% 2. Redistributions in binary form must reproduce the above copyright
-%% notice, this list of conditions and the following disclaimer in the
-%% documentation and/or other materials provided with the distribution.
+%% http://www.apache.org/licenses/LICENSE-2.0
%%
-%% THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-%% "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-%% LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
-%% FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-%% COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
-%% INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
-%% BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-%% LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-%% CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-%% LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
-%% ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-%% POSSIBILITY OF SUCH DAMAGE.
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
-%%% File : erlog_boot.erl
-%%% Author : Robert Virding
-%%% Purpose : Erlog boot module.
+%% File : erlog_boot.erl
+%% Author : Robert Virding
+%% Purpose : Erlog boot module.
-%%% This little beauty allows you to start Erlang with the Erlog shell
-%%% running and still has ^G and user_drv enabled. Use it as follows:
-%%%
-%%% erl -noshell -noinput -s erlog_boot start
-%%%
-%%% NOTE order of commands important, must be -noshell -noinput! Add
-%%% -pa to find modules if necessary.
-%%%
-%%% Thanks to Attila Babo for showing me how to do this.
+%% This little beauty allows you to start Erlang with the Erlog shell
+%% running and still has ^G and user_drv enabled. Use it as follows:
+%%
+%% erl -noshell -noinput -s erlog_boot start
+%%
+%% NOTE order of commands important, must be -noshell -noinput! Add
+%% -pa to find modules if necessary.
+%%
+%% Thanks to Attila Babo for showing me how to do this.
-module(erlog_boot).
View
22 src/erlog_demo.erl
@@ -1,10 +1,20 @@
-%%% File : erlog_demo.erl
-%%% Author : Robert Virding
-%%% Purpose : Demo functions for Erlang interface of Erlog system.
+%% Copyright (c) 2013 Robert Virding
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%% http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
-%%% (C)Robert Virding. This stuff is mine, distributed without
-%%% warranty "as is" and may not be used commercially without written
-%%% permission.
+%% File : erlog_demo.erl
+%% Author : Robert Virding
+%% Purpose : Demo functions for Erlang interface of Erlog system.
-module(erlog_demo).
View
24 src/erlog_ets.erl
@@ -1,10 +1,20 @@
-%%% File : erlog_ets.erl
-%%% Author : Robert Virding
-%%% Purpose : ETS interface for Erlog.
-%%%
-%%% (C)Robert Virding. This stuff is mine, distributed without
-%%% warranty "as is" and may not be used commercially without written
-%%% permission.
+%% Copyright (c) 2008-2013 Robert Virding
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%% http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+
+%% File : erlog_ets.erl
+%% Author : Robert Virding
+%% Purpose : ETS interface for Erlog.
-module(erlog_ets).
View
249 src/erlog_int.erl
@@ -1,136 +1,125 @@
-%% Copyright (c) 2009 Robert Virding. All rights reserved.
+%% Copyright (c) 2008-2013 Robert Virding
%%
-%% Redistribution and use in source and binary forms, with or without
-%% modification, are permitted provided that the following conditions
-%% are met:
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
%%
-%% 1. Redistributions of source code must retain the above copyright
-%% notice, this list of conditions and the following disclaimer.
-%% 2. Redistributions in binary form must reproduce the above copyright
-%% notice, this list of conditions and the following disclaimer in the
-%% documentation and/or other materials provided with the distribution.
+%% http://www.apache.org/licenses/LICENSE-2.0
%%
-%% THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-%% "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-%% LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
-%% FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-%% COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
-%% INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
-%% BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-%% LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-%% CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-%% LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
-%% ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-%% POSSIBILITY OF SUCH DAMAGE.
-
-%%% File : erlog_int.erl
-%%% Author : Robert Virding
-%%% Purpose : Basic interpreter of a Prolog sub-set.
-%%%
-%%% This is the basic Prolog interpreter.
-%%% The internal data structures used are very direct and basic:
-%%%
-%%% Structures - {Functor,arg1, Arg2,...} where Functor is an atom
-%%% Variables - {Name} where Name is an atom or integer
-%%% Lists - Erlang lists
-%%% Atomic - Erlang constants
-%%%
-%%% There is no problem with the representation of variables as Prolog
-%%% functors of arity 0 are atoms. This representation is much easier
-%%% to test for, and create new variables with than using funny atom
-%%% names like '$1' (yuch!), and we need LOTS of variables.
-%%%
-%%% All information about the state of an evaluation is held in the
-%%% variables:
-%%%
-%%% [CurrentGoal,] NextGoal, ChoicePoints, Bindings, VarNum, Database
-%%%
-%%% Proving a goal succeeds when we have reached the end of the goal
-%%% list, i.e. NextGoal is empty (true). Proving goal fails when there
-%%% are no more choice points left to backtrack into. The evaluation
-%%% is completely flat as all back track information is held in
-%%% ChoicePoints. Choice points are added going forwards and removed
-%%% by backtracking and cuts.
-%%%
-%%% Internal goals all have the format {{Name},...} as this is an
-%%% illegal Erlog structure which can never be generated in (legal)
-%%% code.
-%%%
-%%% Proving a top-level goal will return:
-%%%
-%%% {succeed,ChoicePoints,Bindings,VarNum,Database} - the
-%%% goal succeeded and these are the
-%%% choicepoints/bindings/varnum/database to continue with.
-%%%
-%%% {fail,Database} - the goal failed and this is the current database.
-%%%
-%%% When a goal has succeeded back tracking is initiated by calling
-%%% fail(ChoicePoints, Database) which has the same return values as
-%%% proving the goal.
-%%%
-%%% When the interpreter detects an error it builds an error term
-%%%
-%%% {erlog_error,ErrorDescriptor,Database}
-%%%
-%%% and throws it. The ErrorDescriptor is a valid Erlog term.
-%%%
-%%% Database
-%%%
-%%% We use a dictionary for the database. All data for a procedure are
-%%% kept in the database with the functor as key. Interpreted clauses
-%%% are kept in a list, each clause has a unique (for that functor)
-%%% tag. Functions which traverse clauses, clause/retract/goals, get
-%%% the whole list to use. Any database operations can they be done
-%%% directly on the database. Retract uses the tag to remove the
-%%% correct clause. This preserves the logical database view. It is
-%%% possible to use ETS instead if a dictionary, define macro ETS, but
-%%% the logical database view makes it difficult to directly use ETS
-%%% efficiently.
-%%%
-%%% Interpreted Code
-%%%
-%%% Code, interpreted clause bodies, are not stored directly as Erlog
-%%% terms. Before being added to the database they are checked that
-%%% they are well-formed, control structures are recognised, cuts
-%%% augmented with status and sequences of conjunctions are converted
-%%% to lists. When code is used a new instance is made with fresh
-%%% variables, correct cut labels, and bodies directly linked to
-%%% following code to remove the need of later appending.
-%%%
-%%% The following functions convert code:
-%%%
-%%% well_form_body/4 - converts an Erlog term to database code body
-%%% format checking that it is well formed.
-%%% well_form_goal/4 - converts an Erlog term directly to a code body
-%%% checking that it is well formed.
-%%% unify_head/4 - unify a goal directly with head without creating a
-%%% new instance of the head. Saves creating local variables and
-%%% MANY bindings. This is a BIG WIN!
-%%% body_instance/5 - creates a new code body instance from the
-%%% database format.
-%%% body_term/3 - creates a copy of a body as a legal Erlog term.
-%%%
-%%% Choicepoints/Cuts
-%%%
-%%% Choicepoints and cuts are kept on the same stack/list. There are
-%%% different types of cps depending on their context. Failure pops
-%%% the first cp off the stack, passing over cuts and resumes
-%%% execution from that cp. A cut has a label and a flag indicating if
-%%% this is the last cut with this label. Cut steps over cps/cuts
-%%% until a cut the same label is reached and execution is resumed
-%%% with that stack. Unless this is the last cut with a label a new
-%%% cut is pushed on the stack. For efficiency some cps also act as
-%%% cuts.
-%%%
-%%% It is possible to reuse cut labels for different markers as long
-%%% the areas the cuts are valid don't overlap, though one may be
-%%% contained within the other, and the cuts correctly indicate when
-%%% they are the last cut. This is used for ->; and once/1 where we
-%%% KNOW the last cut of the internal section.
-%%%
-%%% It would be better if the cut marker was the actual cps/cut stack
-%%% to go back to but this would entail a more interactive
-%%% body_instance.
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+
+%% File : erlog_int.erl
+%% Author : Robert Virding
+%% Purpose : Basic interpreter of a Prolog sub-set.
+%%
+%% This is the basic Prolog interpreter.
+%% The internal data structures used are very direct and basic:
+%%
+%% Structures - {Functor,arg1, Arg2,...} where Functor is an atom
+%% Variables - {Name} where Name is an atom or integer
+%% Lists - Erlang lists
+%% Atomic - Erlang constants
+%%
+%% There is no problem with the representation of variables as Prolog
+%% functors of arity 0 are atoms. This representation is much easier
+%% to test for, and create new variables with than using funny atom
+%% names like '$1' (yuch!), and we need LOTS of variables.
+%%
+%% All information about the state of an evaluation is held in the
+%% variables:
+%%
+%% [CurrentGoal,] NextGoal, ChoicePoints, Bindings, VarNum, Database
+%%
+%% Proving a goal succeeds when we have reached the end of the goal
+%% list, i.e. NextGoal is empty (true). Proving goal fails when there
+%% are no more choice points left to backtrack into. The evaluation
+%% is completely flat as all back track information is held in
+%% ChoicePoints. Choice points are added going forwards and removed
+%% by backtracking and cuts.
+%%
+%% Internal goals all have the format {{Name},...} as this is an
+%% illegal Erlog structure which can never be generated in (legal)
+%% code.
+%%
+%% Proving a top-level goal will return:
+%%
+%% {succeed,ChoicePoints,Bindings,VarNum,Database} - the
+%% goal succeeded and these are the
+%% choicepoints/bindings/varnum/database to continue with.
+%%
+%% {fail,Database} - the goal failed and this is the current database.
+%%
+%% When a goal has succeeded back tracking is initiated by calling
+%% fail(ChoicePoints, Database) which has the same return values as
+%% proving the goal.
+%%
+%% When the interpreter detects an error it builds an error term
+%%
+%% {erlog_error,ErrorDescriptor,Database}
+%%
+%% and throws it. The ErrorDescriptor is a valid Erlog term.
+%%
+%% Database
+%%
+%% We use a dictionary for the database. All data for a procedure are
+%% kept in the database with the functor as key. Interpreted clauses
+%% are kept in a list, each clause has a unique (for that functor)
+%% tag. Functions which traverse clauses, clause/retract/goals, get
+%% the whole list to use. Any database operations can they be done
+%% directly on the database. Retract uses the tag to remove the
+%% correct clause. This preserves the logical database view. It is
+%% possible to use ETS instead if a dictionary, define macro ETS, but
+%% the logical database view makes it difficult to directly use ETS
+%% efficiently.
+%%
+%% Interpreted Code
+%%
+%% Code, interpreted clause bodies, are not stored directly as Erlog
+%% terms. Before being added to the database they are checked that
+%% they are well-formed, control structures are recognised, cuts
+%% augmented with status and sequences of conjunctions are converted
+%% to lists. When code is used a new instance is made with fresh
+%% variables, correct cut labels, and bodies directly linked to
+%% following code to remove the need of later appending.
+%%
+%% The following functions convert code:
+%%
+%% well_form_body/4 - converts an Erlog term to database code body
+%% format checking that it is well formed.
+%% well_form_goal/4 - converts an Erlog term directly to a code body
+%% checking that it is well formed.
+%% unify_head/4 - unify a goal directly with head without creating a
+%% new instance of the head. Saves creating local variables and
+%% MANY bindings. This is a BIG WIN!
+%% body_instance/5 - creates a new code body instance from the
+%% database format.
+%% body_term/3 - creates a copy of a body as a legal Erlog term.
+%%
+%% Choicepoints/Cuts
+%%
+%% Choicepoints and cuts are kept on the same stack/list. There are
+%% different types of cps depending on their context. Failure pops
+%% the first cp off the stack, passing over cuts and resumes
+%% execution from that cp. A cut has a label and a flag indicating if
+%% this is the last cut with this label. Cut steps over cps/cuts
+%% until a cut the same label is reached and execution is resumed
+%% with that stack. Unless this is the last cut with a label a new
+%% cut is pushed on the stack. For efficiency some cps also act as
+%% cuts.
+%%
+%% It is possible to reuse cut labels for different markers as long
+%% the areas the cuts are valid don't overlap, though one may be
+%% contained within the other, and the cuts correctly indicate when
+%% they are the last cut. This is used for ->; and once/1 where we
+%% KNOW the last cut of the internal section.
+%%
+%% It would be better if the cut marker was the actual cps/cut stack
+%% to go back to but this would entail a more interactive
+%% body_instance.
-module(erlog_int).
View
59 src/erlog_io.erl
@@ -1,41 +1,30 @@
-%% Copyright (c) 2009 Robert Virding. All rights reserved.
+%% Copyright (c) 2008-2013 Robert Virding
%%
-%% Redistribution and use in source and binary forms, with or without
-%% modification, are permitted provided that the following conditions
-%% are met:
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
%%
-%% 1. Redistributions of source code must retain the above copyright
-%% notice, this list of conditions and the following disclaimer.
-%% 2. Redistributions in binary form must reproduce the above copyright
-%% notice, this list of conditions and the following disclaimer in the
-%% documentation and/or other materials provided with the distribution.
+%% http://www.apache.org/licenses/LICENSE-2.0
%%
-%% THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-%% "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-%% LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
-%% FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-%% COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
-%% INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
-%% BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-%% LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-%% CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-%% LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
-%% ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-%% POSSIBILITY OF SUCH DAMAGE.
-
-%%% File : erlog_io.erl
-%%% Author : Robert Virding
-%%% Purpose : Some basic i/o functions for Erlog.
-%%%
-%%% Structures - {Functor,arg1, Arg2,...} where Functor is an atom
-%%% Variables - {Name} where Name is an atom or integer
-%%% Lists - Erlang lists
-%%% Atomic - Erlang constants
-%%%
-%%% There is no problem with the representation of variables as Prolog
-%%% functors of arity 0 are atoms. This representation is much easier
-%%% to test for, and create new variables with than using funny atom
-%%% names like '$1' (yuch!), and we need LOTS of variables.
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+
+%% File : erlog_io.erl
+%% Author : Robert Virding
+%% Purpose : Some basic i/o functions for Erlog.
+%%
+%% Structures - {Functor,arg1, Arg2,...} where Functor is an atom
+%% Variables - {Name} where Name is an atom or integer
+%% Lists - Erlang lists
+%% Atomic - Erlang constants
+%%
+%% There is no problem with the representation of variables as Prolog
+%% functors of arity 0 are atoms. This representation is much easier
+%% to test for, and create new variables with than using funny atom
+%% names like '$1' (yuch!), and we need LOTS of variables.
-module(erlog_io).
View
53 src/erlog_parse.erl
@@ -1,38 +1,27 @@
-%% Copyright (c) 2008 Robert Virding. All rights reserved.
+%% Copyright (c) 2008-2013 Robert Virding
%%
-%% Redistribution and use in source and binary forms, with or without
-%% modification, are permitted provided that the following conditions
-%% are met:
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
%%
-%% 1. Redistributions of source code must retain the above copyright
-%% notice, this list of conditions and the following disclaimer.
-%% 2. Redistributions in binary form must reproduce the above copyright
-%% notice, this list of conditions and the following disclaimer in the
-%% documentation and/or other materials provided with the distribution.
+%% http://www.apache.org/licenses/LICENSE-2.0
%%
-%% THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-%% "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-%% LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
-%% FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-%% COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
-%% INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
-%% BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-%% LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-%% CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-%% LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
-%% ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-%% POSSIBILITY OF SUCH DAMAGE.
-
-%%% File : erlog_parse.erl
-%%% Author : Robert Virding
-%%% Purpose : Erlog parser
-%%%
-%%% Parses Erlog tokens into Erlog terms. Based on the Standard prolog
-%%% parser and directly coded from the parser description. To handle
-%%% back-tracking in the parser we use a continuation style using funs
-%%% where each fun handles one step of what follows. This allows
-%%% back-tracking. This may not be a specially efficient way of
-%%% parsing but it is simple and easy to derive from the
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+
+%% File : erlog_parse.erl
+%% Author : Robert Virding
+%% Purpose : Erlog parser
+%%
+%% Parses Erlog tokens into Erlog terms. Based on the Standard prolog
+%% parser and directly coded from the parser description. To handle
+%% back-tracking in the parser we use a continuation style using funs
+%% where each fun handles one step of what follows. This allows
+%% back-tracking. This may not be a specially efficient way of
+%% parsing but it is simple and easy to derive from the
%%% description. No logical variables are necessary here.
-module(erlog_parse).
View
78 src/erlog_scan.xrl
@@ -1,31 +1,20 @@
-%% Copyright (c) 2008 Robert Virding. All rights reserved.
+%% Copyright (c) 2008-2013 Robert Virding
%%
-%% Redistribution and use in source and binary forms, with or without
-%% modification, are permitted provided that the following conditions
-%% are met:
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
%%
-%% 1. Redistributions of source code must retain the above copyright
-%% notice, this list of conditions and the following disclaimer.
-%% 2. Redistributions in binary form must reproduce the above copyright
-%% notice, this list of conditions and the following disclaimer in the
-%% documentation and/or other materials provided with the distribution.
+%% http://www.apache.org/licenses/LICENSE-2.0
%%
-%% THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-%% "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-%% LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
-%% FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-%% COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
-%% INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
-%% BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-%% LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-%% CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-%% LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
-%% ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-%% POSSIBILITY OF SUCH DAMAGE.
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
-%%% File : erlog_scan.xrl
-%%% Author : Robert Virding
-%%% Purpose : Token definitions for Erlog.
+%% File : erlog_scan.xrl
+%% Author : Robert Virding
+%% Purpose : Token definitions for Erlog.
Definitions.
B = (0|1)
@@ -72,38 +61,23 @@ Rules.
Erlang code.
-%% Copyright (c) 2008 Robert Virding. All rights reserved.
+%% Copyright (c) 2008-2013 Robert Virding
%%
-%% Redistribution and use in source and binary forms, with or without
-%% modification, are permitted provided that the following conditions
-%% are met:
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
%%
-%% 1. Redistributions of source code must retain the above copyright
-%% notice, this list of conditions and the following disclaimer.
-%% 2. Redistributions in binary form must reproduce the above copyright
-%% notice, this list of conditions and the following disclaimer in the
-%% documentation and/or other materials provided with the distribution.
+%% http://www.apache.org/licenses/LICENSE-2.0
%%
-%% THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-%% "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-%% LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
-%% FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-%% COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
-%% INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
-%% BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-%% LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-%% CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-%% LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
-%% ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-%% POSSIBILITY OF SUCH DAMAGE.
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
-%%% File : erlog_scan.erl
-%%% Author : Robert Virding
-%%% Purpose : Token definitions for Erlog.
-%%%
-%%% (C)Robert Virding. This stuff is mine, distributed without
-%%% warranty "as is" and may not be used commercially without written
-%%% permission.
+%% File : erlog_scan.erl
+%% Author : Robert Virding
+%% Purpose : Token definitions for Erlog.
-import(string, [substr/2,substr/3]).
View
37 src/erlog_shell.erl
@@ -1,31 +1,20 @@
-%% Copyright (c) 2008 Robert Virding. All rights reserved.
+%% Copyright (c) 2008-2013 Robert Virding
%%
-%% Redistribution and use in source and binary forms, with or without
-%% modification, are permitted provided that the following conditions
-%% are met:
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
%%
-%% 1. Redistributions of source code must retain the above copyright
-%% notice, this list of conditions and the following disclaimer.
-%% 2. Redistributions in binary form must reproduce the above copyright
-%% notice, this list of conditions and the following disclaimer in the
-%% documentation and/or other materials provided with the distribution.
+%% http://www.apache.org/licenses/LICENSE-2.0
%%
-%% THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-%% "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-%% LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
-%% FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-%% COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
-%% INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
-%% BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-%% LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-%% CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-%% LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
-%% ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-%% POSSIBILITY OF SUCH DAMAGE.
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
-%%% File : erlog_shell.erl
-%%% Author : Robert Virding
-%%% Purpose : A simple Erlog shell.
+%% File : erlog_shell.erl
+%% Author : Robert Virding
+%% Purpose : A simple Erlog shell.
-module(erlog_shell).
View
32 src/user_pl.erl
@@ -1,14 +1,24 @@
-%%% File : user_pl.erl
-%%% Author : Robert Virding
-%%% Purpose : Test compilation of Erlog procedures.
-%%%
-%%% (C)Robert Virding. This stuff is mine, distributed without
-%%% warranty "as is" and may not be used commercially without written
-%%% permission.
-%%%
-%%% Hand compiled app/3 and rev/2 to test speed-up. (~2)
-%%% Hand compiled mem/2 to show the small benefit when only
-%%% implementing indexing on first argument.
+%% Copyright (c) 2008-2013 Robert Virding
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%% http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+
+%% File : user_pl.erl
+%% Author : Robert Virding
+%% Purpose : Test compilation of Erlog procedures.
+%%
+%% Hand compiled app/3 and rev/2 to test speed-up. (~2)
+%% Hand compiled mem/2 to show the small benefit when only
+%% implementing indexing on first argument.
-module(user_pl).
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