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Added function into a files not in zshrc

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This commit is contained in:
Marcin Woźniak
2024-01-28 20:47:53 +01:00
parent b8aef151f2
commit 78ee3595ec
3 changed files with 41 additions and 37 deletions
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21
.local/bin/cidr2mask Executable file
View File

@@ -0,0 +1,21 @@
#!/bin/bash
cidr2mask() {
local i mask=""
local full_octets=$(($1 / 8))
local partial_octet=$(($1 % 8))
for ((i = 0; i < 4; i += 1)); do
if [ $i -lt $full_octets ]; then
mask+=255
elif [ $i -eq $full_octets ]; then
mask+=$((256 - 2 ** (8 - partial_octet)))
else
mask+=0
fi
test $i -lt 3 && mask+=.
done
echo $mask
}
cidr2mask "$@"

20
.local/bin/mask2cidr Executable file
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@@ -0,0 +1,20 @@
#!/bin/bash
mask2cidr() {
local mask=$1
# In RFC 4632 netmasks there's no "255." after a non-255 byte in the mask
local left_stripped_mask=${mask##*255.}
local len_mask=${#mask}
local len_left_stripped_mask=${#left_stripped_mask}
local conversion_table=0^^^128^192^224^240^248^252^254^
local number_of_bits_stripped=$(((len_mask - len_left_stripped_mask) * 2))
local signifacant_octet=${left_stripped_mask%%.*}
local right_stripped_conversion_table=${conversion_table%%$signifacant_octet*}
local len_right_stripped_conversion_table=${#right_stripped_conversion_table}
local number_of_bits_from_conversion_table=$((len_right_stripped_conversion_table / 4))
echo $((number_of_bits_stripped + number_of_bits_from_conversion_table))
}
mask2cidr "$@"

37
.zshrc
View File

@@ -16,43 +16,6 @@ gbranch() {
echo -e "$(git branch "$@")"
}
mask2cidr() {
local mask=$1
# In RFC 4632 netmasks there's no "255." after a non-255 byte in the mask
local left_stripped_mask=${mask##*255.}
local len_mask=${#mask}
local len_left_stripped_mask=${#left_stripped_mask}
local conversion_table=0^^^128^192^224^240^248^252^254^
local number_of_bits_stripped=$((($len_mask - $len_left_stripped_mask) * 2))
local signifacant_octet=${left_stripped_mask%%.*}
local right_stripped_conversion_table=${conversion_table%%$signifacant_octet*}
local len_right_stripped_conversion_table=${#right_stripped_conversion_table}
local number_of_bits_from_conversion_table=$((len_right_stripped_conversion_table / 4))
echo $(($number_of_bits_stripped + $number_of_bits_from_conversion_table))
}
cidr2mask() {
local i mask=""
local full_octets=$(($1 / 8))
local partial_octet=$(($1 % 8))
for ((i = 0; i < 4; i += 1)); do
if [ $i -lt $full_octets ]; then
mask+=255
elif [ $i -eq $full_octets ]; then
mask+=$((256 - 2 ** (8 - $partial_octet)))
else
mask+=0
fi
test $i -lt 3 && mask+=.
done
echo $mask
}
[ -f /etc/gentoo-release ] && export ZSH="/usr/share/zsh/site-contrib/oh-my-zsh"
[ -f /etc/centos-release ] && export ZSH="$HOME/.oh-my-zsh"
[ -f /etc/debian_version ] && export ZSH="$HOME/.oh-my-zsh"