From 9340a339807da41a6b7c91325e2874d193d0a370 Mon Sep 17 00:00:00 2001
From: Scott Lahteine <github@thinkyhead.com>
Date: Sat, 21 Mar 2020 20:35:45 -0500
Subject: [PATCH] Add a pins formatting script

---
 buildroot/share/scripts/pinsformat.js | 141 ++++++++++++++++++++++++++
 1 file changed, 141 insertions(+)
 create mode 100755 buildroot/share/scripts/pinsformat.js

diff --git a/buildroot/share/scripts/pinsformat.js b/buildroot/share/scripts/pinsformat.js
new file mode 100755
index 000000000..3e2a57b55
--- /dev/null
+++ b/buildroot/share/scripts/pinsformat.js
@@ -0,0 +1,141 @@
+#!/usr/bin/env node
+
+//
+// Formatter script for pins_MYPINS.h files
+//
+// Usage: mffmt [infile] [outfile]
+//
+// With no parameters convert STDIN to STDOUT
+//
+
+const fs = require("fs");
+
+// String lpad / rpad
+String.prototype.lpad = function(len, chr) {
+  if (!len) return this;
+  if (chr === undefined) chr = ' ';
+  var s = this+'', need = len - s.length;
+  if (need > 0) s = new Array(need+1).join(chr) + s;
+  return s;
+};
+
+String.prototype.rpad = function(len, chr) {
+  if (!len) return this;
+  if (chr === undefined) chr = ' ';
+  var s = this+'', need = len - s.length;
+  if (need > 0) s += new Array(need+1).join(chr);
+  return s;
+};
+
+const mpatt = [ '-?\\d+', 'P[A-I]\\d+', 'P\\d_\\d+' ],
+      definePatt = new RegExp(`^\\s*(//)?#define\\s+[A-Z_][A-Z0-9_]+\\s+(${mpatt[0]}|${mpatt[1]}|${mpatt[2]})\\s*(//.*)?$`, 'gm'),
+      ppad = [ 3, 4, 5 ],
+      col_comment = 50,
+      col_value_rj = col_comment - 3;
+
+var mexpr = [];
+for (let m of mpatt) mexpr.push(new RegExp('^' + m + '$'));
+
+const argv = process.argv.slice(2), argc = argv.length;
+
+var src_file = 0, src_name = 'STDIN', dst_file;
+if (argc > 0) {
+  src_file = src_name = argv[0];
+  dst_file = argv[argc > 1 ? 1 : 0];
+}
+
+// Read from file or STDIN until it terminates
+const filtered = process_text(fs.readFileSync(src_file).toString());
+if (dst_file)
+  fs.writeFileSync(dst_file, filtered);
+else
+  console.log(filtered);
+
+// Find the pin pattern so non-pin defines can be skipped
+function get_pin_pattern(txt) {
+  var r, m = 0, match_count = [ 0, 0, 0 ];
+  definePatt.lastIndex = 0;
+  while ((r = definePatt.exec(txt)) !== null) {
+    let ind = -1;
+    if (mexpr.some((p) => {
+      ind++;
+      const didmatch = r[2].match(p);
+      return r[2].match(p);
+    }) ) {
+      const m = ++match_count[ind];
+      if (m >= 10) {
+        return { match: mpatt[ind], pad:ppad[ind] };
+      }
+    }
+  }
+  return null;
+}
+
+function process_text(txt) {
+  if (!txt.length) return '(no text)';
+  const patt = get_pin_pattern(txt);
+  if (!patt) return txt;
+  const pindefPatt = new RegExp(`^(\\s*(//)?#define)\\s+([A-Z_][A-Z0-9_]+)\\s+(${patt.match})\\s*(//.*)?$`),
+         noPinPatt = new RegExp(`^(\\s*(//)?#define)\\s+([A-Z_][A-Z0-9_]+)\\s+(-1)\\s*(//.*)?$`),
+          skipPatt = new RegExp('^(\\s*(//)?#define)\\s+(AT90USB|USBCON|BOARD_.+|.+_MACHINE_NAME|.+_SERIAL)\\s+(.+)\\s*(//.*)?$'),
+         aliasPatt = new RegExp('^(\\s*(//)?#define)\\s+([A-Z_][A-Z0-9_]+)\\s+([A-Z_][A-Z0-9_()]+)\\s*(//.*)?$'),
+        switchPatt = new RegExp('^(\\s*(//)?#define)\\s+([A-Z_][A-Z0-9_]+)\\s*(//.*)?$'),
+         undefPatt = new RegExp('^(\\s*(//)?#undef)\\s+([A-Z_][A-Z0-9_]+)\\s*(//.*)?$'),
+           defPatt = new RegExp('^(\\s*(//)?#define)\\s+([A-Z_][A-Z0-9_]+)\\s+(\\w+)\\s*(//.*)?$'),
+          condPatt = new RegExp('^(\\s*(//)?#(if|ifn?def|else|elif)(\\s+\\S+)*)\\s+(//.*)$'),
+          commPatt = new RegExp('^\\s{20,}(//.*)?$');
+  const col_value_lj = col_comment - patt.pad - 2;
+  var r, out = '', check_comment_next = false;
+  txt.split('\n').forEach((line) => {
+    if (check_comment_next)
+      check_comment_next = ((r = commPatt.exec(line)) !== null);
+
+    if (check_comment_next)
+      // Comments in column 45
+      line = ''.rpad(col_comment) + r[1];
+
+    else if ((r = pindefPatt.exec(line)) !== null) {
+      //
+      // #define MY_PIN [pin]
+      //
+      const pinnum = r[4].charAt(0) == 'P' ? r[4] : r[4].lpad(patt.pad);
+      line = r[1] + ' ' + r[3];
+      line = line.rpad(col_value_lj) + pinnum;
+      if (r[5]) line = line.rpad(col_comment) + r[5];
+    }
+    else if ((r = noPinPatt.exec(line)) !== null) {
+      //
+      // #define MY_PIN -1
+      //
+      line = r[1] + ' ' + r[3];
+      line = line.rpad(col_value_lj) + '-1';
+      if (r[5]) line = line.rpad(col_comment) + r[5];
+    }
+    else if ((r = skipPatt.exec(line)) !== null) {
+    }
+    else if ((r = aliasPatt.exec(line)) !== null) {
+      line = r[1] + ' ' + r[3];
+      line += r[4].lpad(col_value_rj + 1 - line.length);
+      if (r[5]) line = line.rpad(col_comment) + r[5];
+    }
+    else if ((r = switchPatt.exec(line)) !== null) {
+      line = r[1] + ' ' + r[3];
+      if (r[4]) line = line.rpad(col_comment) + r[4];
+      check_comment_next = true;
+    }
+    else if ((r = defPatt.exec(line)) !== null) {
+      line = r[1] + ' ' + r[3] + ' ' + r[4];
+      if (r[5]) line = line.rpad(col_comment) + r[5];
+    }
+    else if ((r = undefPatt.exec(line)) !== null) {
+      line = r[1] + ' ' + r[3];
+      if (r[4]) line = line.rpad(col_comment) + r[4];
+    }
+    else if ((r = condPatt.exec(line)) !== null) {
+      line = r[1].rpad(col_comment) + r[5];
+      check_comment_next = true;
+    }
+    out += line + '\n';
+  });
+  return out.replace(/\n\n+/g, '\n\n').replace(/\n\n$/g, '\n');
+}