File: realign.sh
   1 #!/bin/sh
   2 
   3 # The MIT License (MIT)
   4 #
   5 # Copyright © 2020-2025 pacman64
   6 #
   7 # Permission is hereby granted, free of charge, to any person obtaining a copy
   8 # of this software and associated documentation files (the “Software”), to deal
   9 # in the Software without restriction, including without limitation the rights
  10 # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  11 # copies of the Software, and to permit persons to whom the Software is
  12 # furnished to do so, subject to the following conditions:
  13 #
  14 # The above copyright notice and this permission notice shall be included in
  15 # all copies or substantial portions of the Software.
  16 #
  17 # THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  20 # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  23 # SOFTWARE.
  24 
  25 
  26 # realign [filenames...]
  27 #
  28 # Realign all detected columns, right-aligning any detected numbers in any
  29 # column.
  30 
  31 
  32 case "$1" in
  33     -h|--h|-help|--help)
  34         awk '/^# +realign /, /^$/ { gsub(/^# ?/, ""); print }' "$0"
  35         exit 0
  36     ;;
  37 esac
  38 
  39 
  40 awk '
  41     function match_number(v) { return match(v, /^[+-]?[0-9]+(\.[0-9]+)?$/) }
  42     function match_dot_digits(v) { return match(v, /\.[0-9]+$/) }
  43 
  44     { gsub(/\r$/, "") }
  45 
  46     FNR == 1 { FS = ($0 ~ /\t/) ? "\t" : " "; $0 = $0 }
  47 
  48     {
  49         for (i = 1; i <= NF; i++) {
  50             data[NR][i] = $i
  51 
  52             if (match_number($i)) {
  53                 if (match_dot_digits($i)) {
  54                     dd = RLENGTH
  55                     if (dot_decs[i] < dd) dot_decs[i] = dd
  56                     iw = RSTART - 1
  57                     if (int_widths[i] < iw) int_widths[i] = iw
  58                 } else {
  59                     w = length($i)
  60                     if (int_widths[i] < w) int_widths[i] = w
  61                 }
  62 
  63                 continue
  64             }
  65 
  66             w = length($i)
  67             if (widths[i] < w) widths[i] = w
  68         }
  69     }
  70 
  71     END {
  72         # fix column-widths using the number-padding info
  73         for (i = 1; i <= NF; i++) {
  74             w = int_widths[i] + dot_decs[i]
  75             if (widths[i] < w) widths[i] = w
  76         }
  77 
  78         for (i = 1; i <= NR; i++) {
  79             last = length(data[i])
  80 
  81             for (j = 1; j <= last; j++) {
  82                 if (j > 1) printf "  " # put 2-space gaps between columns
  83 
  84                 v = data[i][j]
  85 
  86                 if (!match_number(v)) {
  87                     # avoid adding trailing spaces at the end of lines
  88                     printf "%*s", (j == last) ? 0 : -widths[j], v
  89                     continue
  90                 }
  91 
  92                 w = length(v)
  93                 if (match_dot_digits(v)) {
  94                     dd = RLENGTH
  95                     iw = RSTART - 1
  96                 } else {
  97                     dd = 0
  98                     iw = w
  99                 }
 100 
 101                 dpad = dot_decs[j] - dd
 102                 ipad = int_widths[j] - iw
 103                 if (ipad < 0) ipad = 0
 104                 lpad = widths[j] - (ipad + w + dpad)
 105                 if (lpad < 0) lpad = 0
 106 
 107                 # avoid adding trailing spaces at the end of lines
 108                 if (j == last) dpad = 0
 109 
 110                 printf "%*s%*s%s%*s", lpad, "", ipad, "", v, dpad, ""
 111             }
 112 
 113             printf "\n"
 114         }
 115     }
 116 ' "$@"