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authorGravatar Benjamin Barenblat <bbaren@google.com>2017-07-26 14:04:29 -0400
committerGravatar Benjamin Barenblat <bbaren@google.com>2017-07-26 14:04:29 -0400
commitad9b171dc72179bf67c909b475cc277855677efa (patch)
treec42b7b792cd21e0e696223067f5b9f0f7d94e575
Initial commit
-rw-r--r--.gitignore14
-rw-r--r--CONTRIBUTING.md23
-rw-r--r--LICENSE202
-rw-r--r--README.md19
-rwxr-xr-xbin21
-rwxr-xr-xbitrule76
-rw-r--r--convert_base.py55
-rwxr-xr-xhex21
8 files changed, 431 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore
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--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,14 @@
+# Editor backup files
+*~
+\#*
+.\#*
+.*.swp
+
+# Python
+*.pyc
+__pycache__/
+
+
+# Local Variables:
+# mode: conf
+# End:
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 0000000..ae319c7
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,23 @@
+# How to Contribute
+
+We'd love to accept your patches and contributions to this project. There are
+just a few small guidelines you need to follow.
+
+## Contributor License Agreement
+
+Contributions to this project must be accompanied by a Contributor License
+Agreement. You (or your employer) retain the copyright to your contribution,
+this simply gives us permission to use and redistribute your contributions as
+part of the project. Head over to <https://cla.developers.google.com/> to see
+your current agreements on file or to sign a new one.
+
+You generally only need to submit a CLA once, so if you've already submitted one
+(even if it was for a different project), you probably don't need to do it
+again.
+
+## Code reviews
+
+All submissions, including submissions by project members, require review. We
+use GitHub pull requests for this purpose. Consult
+[GitHub Help](https://help.github.com/articles/about-pull-requests/) for more
+information on using pull requests.
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..d645695
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,202 @@
+
+ Apache License
+ Version 2.0, January 2004
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+
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diff --git a/README.md b/README.md
new file mode 100644
index 0000000..0dd6116
--- /dev/null
+++ b/README.md
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+# bitutils
+
+This is a collection of scripts which make working with binary numbers a bit
+easier.
+
+- `bin` converts its argument (or standard input) to binary.
+- `hex` converts its argument (or standard input) to hexadecimal.
+- `bitrule` displays a ruler below its standard input.
+
+This is not an official Google product.
+
+## Example
+
+``` shellsession
+$ bin 12345 | bitrule
+0b11000000111001
+ '|'''|'''|'''|
+ 12 8 4 0
+```
diff --git a/bin b/bin
new file mode 100755
index 0000000..80b71e3
--- /dev/null
+++ b/bin
@@ -0,0 +1,21 @@
+#!/usr/bin/python3
+# Copyright 2017 Google Inc.
+#
+# 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
+#
+# https://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.
+
+
+import convert_base
+
+
+if __name__ == '__main__':
+ convert_base.main(bin, '0b', 'bit')
diff --git a/bitrule b/bitrule
new file mode 100755
index 0000000..5724a6f
--- /dev/null
+++ b/bitrule
@@ -0,0 +1,76 @@
+#!/usr/bin/awk -E
+# Copyright 2017 Google Inc.
+#
+# 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
+#
+# https://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.
+
+# Usage: bitrule [number_of_characters_to_ignore_at_start
+
+function usage() {
+ print "usage: bitrule [n_chars_to_ignore_at_line_start]" >"/dev/stderr"
+ exiting=1; exit
+}
+
+function repeat(s, n, r, i) {
+ for (i = 0; i < n; ++i)
+ r = r " "
+ return r
+}
+
+BEGIN {
+ ignore_leading = "none"
+
+ if (ARGC > 2)
+ usage()
+ else if (ARGC == 2) {
+ ignore_leading = ARGV[1]
+ delete ARGV[1] # don't treat it as a file
+ if (ignore_leading < 0)
+ usage()
+ }
+}
+
+# Track the maximum length of the lines.
+length($0) > max_length { max_length = length($0) }
+
+# Detect lines beginning in '0b', '0x' or '0o'. These are binary representations
+# of numbers and shouldn't have the rule extend through their prefix.
+/^0[box].*/ { is_prefixed = 1 }
+
+{ print }
+
+END {
+ if (exiting)
+ exit exiting
+
+ top = max_length - 1
+
+ if (ignore_leading != "none") {
+ prefix = repeat(" ", ignore_leading)
+ top -= ignore_leading
+ } else if (is_prefixed) {
+ prefix = " "
+ top -= 2
+ }
+
+ # Print the ruler.
+ printf(prefix)
+ for (i = top; i >= 0; --i)
+ printf(i % 4 ? "'" : "|")
+ printf("\n")
+
+ # Print the numbers.
+ printf("%s%s", prefix, repeat("x", top % 4))
+ for (i = int(top / 4) * 4; i >= 0; i -= 4)
+ printf("%-4d", i)
+ printf("\n")
+}
diff --git a/convert_base.py b/convert_base.py
new file mode 100644
index 0000000..a74f672
--- /dev/null
+++ b/convert_base.py
@@ -0,0 +1,55 @@
+# Copyright 2017 Google Inc.
+#
+# 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
+#
+# https://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.
+
+
+import argparse
+import sys
+
+
+def _convert(to_base, num):
+ return to_base(int(num, 0))[2:]
+
+
+def _prettify(bits, options):
+ result = [options.prefix]
+ if options.width:
+ result.append('0' * max(0, options.width - len(bits)))
+ result.append(bits)
+ return ''.join(result)
+
+
+def main(to_base, prefix, unit_name):
+ parser = argparse.ArgumentParser()
+ parser.add_argument('number', nargs='*', default=None)
+ parser.add_argument(
+ '-w',
+ type=int,
+ help=unit_name+' width to format as',
+ metavar='WIDTH',
+ dest='width')
+ parser.add_argument(
+ '-P',
+ action='store_const',
+ const='',
+ default=prefix,
+ help='disable `'+prefix+'` prefix',
+ dest='prefix')
+ options = parser.parse_args()
+
+ if options.number:
+ for number in options.number:
+ print(_prettify(_convert(to_base, number), options))
+ else:
+ for line in sys.stdin:
+ print(_prettify(_convert(to_base, line.strip()), options))
diff --git a/hex b/hex
new file mode 100755
index 0000000..2cfe969
--- /dev/null
+++ b/hex
@@ -0,0 +1,21 @@
+#!/usr/bin/python3
+# Copyright 2017 Google Inc.
+#
+# 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
+#
+# https://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.
+
+
+import convert_base
+
+
+if __name__ == '__main__':
+ convert_base.main(hex, '0x', 'word')