1 files changed, 157 insertions, 0 deletions
diff --git a/contrib/tools/chkfmt.sh b/contrib/tools/chkfmt.sh
new file mode 100755
index 000000000..8810aa7b5
--- /dev/null
+++ b/contrib/tools/chkfmt.sh
@@ -0,0 +1,157 @@
+#!/bin/sh
+
+# chkfmt.sh
+#
+# COPYRIGHT:
+# Written by John Cunningham Bowler, 2010.
+# Revised by Cosmin Truta, 2022.
+# To the extent possible under law, the author has waived all copyright and
+# related or neighboring rights to this work.  The author published this work
+# from the United States.
+#
+# Check the format of the source files in the current directory:
+#
+#  * The lines should not exceed a predefined maximum length.
+#  * Tab characters should appear only where necessary (e.g. in makefiles).
+#
+# Optionally arguments are files or directories to check.
+#
+#  -v: output the long lines (makes fixing them easier)
+#  -e: spawn an editor for each file that needs a change ($EDITOR must be
+#      defined).  When using -e the script MUST be run from an interactive
+#      command line.
+
+script_name=`basename "$0"`
+
+verbose=
+edit=
+vers=
+test "$1" = "-v" && {
+   shift
+   verbose=yes
+}
+test "$1" = "-e" && {
+   shift
+   if test -n "$EDITOR"
+   then
+      edit=yes
+
+      # Copy the standard streams for the editor
+      exec 3>&0 4>&1 5>&2
+   else
+      echo "$script_name -e: EDITOR must be defined" >&2
+      exit 1
+   fi
+}
+
+# Function to edit a single file - if the file isn't changed ask the user
+# whether or not to continue.  This stuff only works if the script is run
+# from the command line (otherwise, don't specify -e or you will be sorry).
+doed(){
+   cp "$file" "$file".orig
+   "$EDITOR" "$file" 0>&3 1>&4 2>&5 3>&- 4>&- 5>&- || exit 1
+   if cmp -s "$file".orig "$file"
+   then
+      rm "$file".orig
+      echo -n "$file: file not changed, type anything to continue: " >&5
+      read ans 0>&3
+      test -n "$ans" || return 1
+   fi
+   return 0
+}
+
+# In beta versions, the version string which appears in files can be a little
+# long and cause spuriously overlong lines.  To avoid this, substitute the
+# version string with a placeholder string "a.b.cc" before checking for long
+# lines.
+# (Starting from libpng version 1.6.36, we switched to a conventional Git
+# workflow, and we are no longer publishing beta versions.)
+if test -r png.h
+then
+   vers="`sed -n -e \
+   's/^#define PNG_LIBPNG_VER_STRING .\([0-9]\.[0-9]\.[0-9][0-9a-z]*\).$/\1/p' \
+   png.h`"
+   echo "$script_name: checking version $vers"
+fi
+if test -z "$vers"
+then
+   echo "$script_name: png.h not found, ignoring version number" >&2
+fi
+
+test -n "$1" || set -- .
+find "$@" \( -type d \( -name '.git' -o -name '.libs' -o -name 'projects' \) \
+   -prune \) -o \( -type f \
+   ! -name '*.[oa]' ! -name '*.l[oa]' !  -name '*.png' ! -name '*.out' \
+   ! -name '*.jpg' ! -name '*.patch' ! -name '*.obj' ! -name '*.exe' \
+   ! -name '*.com' ! -name '*.tar.*' ! -name '*.zip' ! -name '*.ico' \
+   ! -name '*.res' ! -name '*.rc' ! -name '*.mms' ! -name '*.rej' \
+   ! -name '*.dsp' ! -name '*.orig' ! -name '*.dfn' ! -name '*.swp' \
+   ! -name '~*' ! -name '*.3' \
+   ! -name 'missing' ! -name 'mkinstalldirs' ! -name 'depcomp' \
+   ! -name 'aclocal.m4' ! -name 'install-sh' ! -name 'Makefile.in' \
+   ! -name 'ltmain.sh' ! -name 'config*' -print \) | {
+   st=0
+   while read file
+   do
+      case "$file" in
+      *.mak|*[Mm]akefile.*|*[Mm]akefile)
+         # Makefiles require tabs, dependency lines can be this long.
+         check_tabs=
+         line_length=100;;
+      *.awk)
+         # Allow literal tabs.
+         check_tabs=
+         # Mainframe line printer, anyone?
+         line_length=132;;
+      */ci_*.sh)
+         check_tabs=yes
+         line_length=100;;
+      *contrib/*/*.[ch])
+         check_tabs=yes
+         line_length=100;;
+      *)
+         check_tabs=yes
+         line_length=80;;
+      esac
+
+      # Note that vers can only contain 0-9, . and a-z
+      if test -n "$vers"
+      then
+         sed -e "s/$vers/a.b.cc/g" "$file" >"$file".$$
+      else
+         cp "$file" "$file".$$
+      fi
+      splt="`fold -$line_length "$file".$$ | diff -c "$file".$$ -`"
+      rm "$file".$$
+
+      if test -n "$splt"
+      then
+         echo "$file: lines too long"
+         st=1
+         if test -n "$EDITOR" -a -n "$edit"
+         then
+            doed "$file" || exit 1
+         elif test -n "$verbose"
+         then
+            echo "$splt"
+         fi
+      fi
+      if test -n "$check_tabs"
+      then
+         tab="`tr -c -d '\t' <"$file"`"
+         if test -n "$tab"
+         then
+            echo "$file: file contains tab characters"
+            st=1
+            if test -n "$EDITOR" -a -n "$edit"
+            then
+               doed "$file" || exit 1
+            elif test -n "$verbose"
+            then
+               echo "$splt"
+            fi
+         fi
+      fi
+   done
+   exit $st
+}