Add per-file copyright notices & contact info

This is the safest thing to do to ensure my software is free while
avoiding legal trouble ... hopefully, I'm not a lawyer!

15 files changed, 242 insertions, 0 deletions

diff --git a/README.org b/README.org
index 28667cd..ad462e4 100644
--- a/README.org
+++ b/README.org
@@ -86,3 +86,21 @@ The MTC is an estimate of how difficult it is to learn a radix's multiplication
 The radix's natural logarithm indicates its information density - how much information it can fit into a digit.  Radices with higher logarithms will be able to count higher with fewer digits, and approximations will be more accurate for the same number of decimal places.
 
 Specifically, numbers in radix a will have ln(b)/ln(a) times as many digits as numbers in radix b.  For example, ln(20)/ln(10)≈1.30, so decimal numbers will have around 30% more digits than vigesimal numbers.
+** Copyright & Contact Info
+radix_info: gives some information about number radices
+Copyright (C) 2023  Adrien Hopkins
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of version 3 of the GNU General Public License
+as published by the Free Software Foundation.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+I can be found at <adrien.p.hopkins@gmail.com>.
+I accept emailed patches there (more info at https://git-send-email.io/)!
diff --git a/args.go b/args.go
index 0fb12d4..b0477f1 100644
--- a/args.go
+++ b/args.go
@@ -1,3 +1,19 @@
+/* This script is part of radix_info.
+   Copyright (C) 2023  Adrien Hopkins
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of version 3 of the GNU General Public License
+   as published by the Free Software Foundation.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
 package main
 
 import (
diff --git a/factor_info.go b/factor_info.go
index f3193b5..1988b2c 100644
--- a/factor_info.go
+++ b/factor_info.go
@@ -1,3 +1,19 @@
+/* This script is part of radix_info.
+   Copyright (C) 2023  Adrien Hopkins
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of version 3 of the GNU General Public License
+   as published by the Free Software Foundation.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
 package main
 
 import (
diff --git a/factors/digit_map.go b/factors/digit_map.go
index 7c56a1e..3baf468 100644
--- a/factors/digit_map.go
+++ b/factors/digit_map.go
@@ -1,3 +1,19 @@
+/* This script is part of radix_info.
+   Copyright (C) 2023  Adrien Hopkins
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of version 3 of the GNU General Public License
+   as published by the Free Software Foundation.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
 package factors
 
 import "fmt"
diff --git a/factors/factorize.go b/factors/factorize.go
index 16cd810..2a3f143 100644
--- a/factors/factorize.go
+++ b/factors/factorize.go
@@ -1,3 +1,19 @@
+/* This script is part of radix_info.
+   Copyright (C) 2023  Adrien Hopkins
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of version 3 of the GNU General Public License
+   as published by the Free Software Foundation.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
 package factors
 
 // Factors returns a number's factors as a slice.
diff --git a/factors/mtc.go b/factors/mtc.go
index 4d40396..db3e670 100644
--- a/factors/mtc.go
+++ b/factors/mtc.go
@@ -1,3 +1,19 @@
+/* This script is part of radix_info.
+   Copyright (C) 2023  Adrien Hopkins
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of version 3 of the GNU General Public License
+   as published by the Free Software Foundation.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
 package factors
 
 // MTC returns the multiplication table complexity of a radix n.
diff --git a/factors/prime_factorization.go b/factors/prime_factorization.go
index f758448..2f0cde0 100644
--- a/factors/prime_factorization.go
+++ b/factors/prime_factorization.go
@@ -1,3 +1,19 @@
+/* This script is part of radix_info.
+   Copyright (C) 2023  Adrien Hopkins
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of version 3 of the GNU General Public License
+   as published by the Free Software Foundation.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
 package factors
 
 import (
diff --git a/factors/property_test.go b/factors/property_test.go
index 7072050..a4a1463 100644
--- a/factors/property_test.go
+++ b/factors/property_test.go
@@ -1,3 +1,19 @@
+/* This script is part of radix_info.
+   Copyright (C) 2023  Adrien Hopkins
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of version 3 of the GNU General Public License
+   as published by the Free Software Foundation.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
 package factors
 
 import (
diff --git a/factors/score.go b/factors/score.go
index b1da963..9d2d03b 100644
--- a/factors/score.go
+++ b/factors/score.go
@@ -1,3 +1,19 @@
+/* This script is part of radix_info.
+   Copyright (C) 2023  Adrien Hopkins
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of version 3 of the GNU General Public License
+   as published by the Free Software Foundation.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
 package factors
 
 import (
diff --git a/factors/slices.go b/factors/slices.go
index f2462cf..8b70575 100644
--- a/factors/slices.go
+++ b/factors/slices.go
@@ -1,3 +1,19 @@
+/* This script is part of radix_info.
+   Copyright (C) 2023  Adrien Hopkins
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of version 3 of the GNU General Public License
+   as published by the Free Software Foundation.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
 package factors
 
 import "sort"
diff --git a/factors/table_test.go b/factors/table_test.go
index 828d80b..c7eeb24 100644
--- a/factors/table_test.go
+++ b/factors/table_test.go
@@ -1,3 +1,19 @@
+/* This script is part of radix_info.
+   Copyright (C) 2023  Adrien Hopkins
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of version 3 of the GNU General Public License
+   as published by the Free Software Foundation.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
 package factors
 
 import (
diff --git a/factors/totative.go b/factors/totative.go
index 9dde4b0..ff3a4ab 100644
--- a/factors/totative.go
+++ b/factors/totative.go
@@ -1,3 +1,19 @@
+/* This script is part of radix_info.
+   Copyright (C) 2023  Adrien Hopkins
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of version 3 of the GNU General Public License
+   as published by the Free Software Foundation.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
 package factors
 
 // Totient calculates the number of numbers between 1 and n inclusive
diff --git a/factors/type.go b/factors/type.go
index 3e116af..7c11bf5 100644
--- a/factors/type.go
+++ b/factors/type.go
@@ -1,3 +1,19 @@
+/* This script is part of radix_info.
+   Copyright (C) 2023  Adrien Hopkins
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of version 3 of the GNU General Public License
+   as published by the Free Software Foundation.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
 package factors
 
 // The set of all colossaly abundant numbers that are small enough
diff --git a/factors/uintpow.go b/factors/uintpow.go
index 50bfe9d..e598213 100644
--- a/factors/uintpow.go
+++ b/factors/uintpow.go
@@ -1,3 +1,19 @@
+/* This script is part of radix_info.
+   Copyright (C) 2023  Adrien Hopkins
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of version 3 of the GNU General Public License
+   as published by the Free Software Foundation.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
 package factors
 
 func uintpow(base, exponent uint) uint {
diff --git a/print_digit_map.go b/print_digit_map.go
index 3e59c8c..1bbfa8b 100644
--- a/print_digit_map.go
+++ b/print_digit_map.go
@@ -1,3 +1,19 @@
+/* This script is part of radix_info.
+   Copyright (C) 2023  Adrien Hopkins
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of version 3 of the GNU General Public License
+   as published by the Free Software Foundation.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
 package main
 
 import (