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Avoid RegExp.$1 and friends

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This commit is contained in:
Joshua Bell 2016-10-13 22:17:30 -07:00
parent 78428020d8
commit 3cb6079d58
1 changed files with 39 additions and 36 deletions
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75
dos.js
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@ -57,6 +57,7 @@ function DOS(tty) {
// Internal - crack arguments e.g. ",S6,D1" // Internal - crack arguments e.g. ",S6,D1"
function parseArgs(str, opts) { function parseArgs(str, opts) {
str = str || '';
opts = opts || ''; opts = opts || '';
// Set these to zero so they're always defined when passed into command handlers // Set these to zero so they're always defined when passed into command handlers
@ -73,12 +74,13 @@ function DOS(tty) {
O: undefined // Echo Output O: undefined // Echo Output
}; };
while (str.match(/^,?\s*([VDSLRBACIO])\s*([0-9]+|\$[0-9A-Fa-f]+)?\s*([\x20-\x7E]*)/)) { var m;
if (opts.indexOf(RegExp.$1) === -1) { while ((m = str.match(/^,?\s*([VDSLRBACIO])\s*([0-9]+|\$[0-9A-Fa-f]+)?\s*([\x20-\x7E]*)/))) {
if (opts.indexOf(m[1]) === -1) {
doserror(DOSErrors.INVALID_OPTION); doserror(DOSErrors.INVALID_OPTION);
} }
args[RegExp.$1] = Number(RegExp.$2); args[m[1]] = Number(m[2]);
str = RegExp.$3; str = m[3];
} }
if (str.length > 0) { if (str.length > 0) {
@ -288,9 +290,10 @@ function DOS(tty) {
tty.writeString(command + "\r"); tty.writeString(command + "\r");
} }
if (command.match(/^MON([\x20-\x7E]*)/)) { var m;
if ((m = command.match(/^MON([\x20-\x7E]*)/))) {
// MON[,C][,I][,O] Traces DOS 3.3 commands ('Commands', 'Input' and 'Output') // MON[,C][,I][,O] Traces DOS 3.3 commands ('Commands', 'Input' and 'Output')
args = parseArgs(RegExp.$1, 'ICO'); args = parseArgs(m[1], 'ICO');
if (args.I !== undefined) { if (args.I !== undefined) {
monico |= MON_I; monico |= MON_I;
@ -302,9 +305,9 @@ function DOS(tty) {
monico |= MON_O; monico |= MON_O;
} }
} else if (command.match(/^NOMON([\x20-\x7E]*)/)) { } else if ((m = command.match(/^NOMON([\x20-\x7E]*)/))) {
// NOMON[,C][,I][,O] Cancels tracing of DOS 3.3 commands ('Commands', 'Input' and 'Output') // NOMON[,C][,I][,O] Cancels tracing of DOS 3.3 commands ('Commands', 'Input' and 'Output')
args = parseArgs(RegExp.$1, 'ICO'); args = parseArgs(m[1], 'ICO');
if (args.I !== undefined) { if (args.I !== undefined) {
monico &= ~MON_I; monico &= ~MON_I;
} }
@ -314,50 +317,50 @@ function DOS(tty) {
if (args.O !== undefined) { if (args.O !== undefined) {
monico &= ~MON_O; monico &= ~MON_O;
} }
} else if (command.match(/^OPEN\s*([\x20-\x2B\x2D-\x7E]+)(,[\x20-\x7E]*)?/)) { } else if ((m = command.match(/^OPEN\s*([\x20-\x2B\x2D-\x7E]+)(,[\x20-\x7E]*)?/))) {
// OPEN filename[,Llen] Opens a text file. // OPEN filename[,Llen] Opens a text file.
filename = RegExp.$1; filename = m[1];
args = parseArgs(RegExp.$2, 'L'); args = parseArgs(m[2], 'L');
open(filename, args.L); open(filename, args.L);
} else if (command.match(/^APPEND\s*([\x20-\x2B\x2D-\x7E]+)(,[\x20-\x7E]*)?/)) { } else if ((m = command.match(/^APPEND\s*([\x20-\x2B\x2D-\x7E]+)(,[\x20-\x7E]*)?/))) {
// APPEND filename Appends to a text file. // APPEND filename Appends to a text file.
filename = RegExp.$1; filename = m[1];
args = parseArgs(RegExp.$2); args = parseArgs(m[2]);
append(filename, args.L); append(filename, args.L);
} else if (command.match(/^CLOSE\s*([\x20-\x2B\x2D-\x7E]+)?(,[\x20-\x7E]*)?/)) { } else if ((m = command.match(/^CLOSE\s*([\x20-\x2B\x2D-\x7E]+)?(,[\x20-\x7E]*)?/))) {
// CLOSE [filename] Closes specified (or all) open text files. // CLOSE [filename] Closes specified (or all) open text files.
filename = RegExp.$1; filename = m[1];
close(filename); close(filename);
} else if (command.match(/^POSITION\s*([\x20-\x2B\x2D-\x7E]+)(,[\x20-\x7E]*)?/)) { } else if ((m = command.match(/^POSITION\s*([\x20-\x2B\x2D-\x7E]+)(,[\x20-\x7E]*)?/))) {
// POSITION filename[,Rnum] Advances position in text file. // POSITION filename[,Rnum] Advances position in text file.
filename = RegExp.$1; filename = m[1];
args = parseArgs(RegExp.$2, 'R'); args = parseArgs(m[2], 'R');
position(filename, args.R); position(filename, args.R);
} else if (command.match(/^READ\s*([\x20-\x2B\x2D-\x7E]+)(,[\x20-\x7E]*)?/)) { } else if ((m = command.match(/^READ\s*([\x20-\x2B\x2D-\x7E]+)(,[\x20-\x7E]*)?/))) {
// READ filename[,Rnum][,Bbyte] Reads from a text file. // READ filename[,Rnum][,Bbyte] Reads from a text file.
filename = RegExp.$1; filename = m[1];
args = parseArgs(RegExp.$2, 'RB'); args = parseArgs(m[2], 'RB');
read(filename, args.R, args.B); read(filename, args.R, args.B);
} else if (command.match(/^WRITE\s*([\x20-\x2B\x2D-\x7E]+)(,[\x20-\x7E]*)?/)) { } else if ((m = command.match(/^WRITE\s*([\x20-\x2B\x2D-\x7E]+)(,[\x20-\x7E]*)?/))) {
// WRITE filename[,Rnum][,Bbyte] Writes to a text file. // WRITE filename[,Rnum][,Bbyte] Writes to a text file.
filename = RegExp.$1; filename = m[1];
args = parseArgs(RegExp.$2, 'RB'); args = parseArgs(m[2], 'RB');
write(filename, args.R, args.B); write(filename, args.R, args.B);
} else if (command.match(/^DELETE\s*([\x20-\x2B\x2D-\x7E]+)(,[\x20-\x7E]*)?/)) { } else if ((m = command.match(/^DELETE\s*([\x20-\x2B\x2D-\x7E]+)(,[\x20-\x7E]*)?/))) {
// DELETE filename Delete a file // DELETE filename Delete a file
filename = RegExp.$1; filename = m[1];
args = parseArgs(RegExp.$2); args = parseArgs(m[2]);
unlink(filename); unlink(filename);
} else if (command.match(/^RENAME\s*([\x20-\x2B\x2D-\x7E]+),\s*([\x20-\x2B\x2D-\x7E]+)(,[\x20-\x7E]*)?/)) { } else if ((m = command.match(/^RENAME\s*([\x20-\x2B\x2D-\x7E]+),\s*([\x20-\x2B\x2D-\x7E]+)(,[\x20-\x7E]*)?/))) {
// RENAME filename,filename Rename a file // RENAME filename,filename Rename a file
filename = RegExp.$1; filename = m[1];
filename2 = RegExp.$2; filename2 = m[2];
args = parseArgs(RegExp.$3); args = parseArgs(m[3]);
rename(filename, filename2); rename(filename, filename2);
} else if (command.match(/^PR#\s*([\x20-\x2B\x2D-\x7E]+)(,[\x20-\x7E]*)?/)) { } else if ((m = command.match(/^PR#\s*([\x20-\x2B\x2D-\x7E]+)(,[\x20-\x7E]*)?/))) {
// PR# slot Direct output to slot // PR# slot Direct output to slot
slot = Number(RegExp.$1); slot = Number(m[1]);
args = parseArgs(RegExp.$2); args = parseArgs(m[2]);
if (slot === 0) { if (slot === 0) {
if (tty.setFirmwareActive) { tty.setFirmwareActive(false); } if (tty.setFirmwareActive) { tty.setFirmwareActive(false); }
} else if (slot === 3) { } else if (slot === 3) {
@ -365,7 +368,7 @@ function DOS(tty) {
} else { } else {
doserror(DOSErrors.RANGE_ERROR); doserror(DOSErrors.RANGE_ERROR);
} }
} else if (command.match(/^$/)) { } else if ((m = command.match(/^$/))) {
// Null command - terminates a READ/WRITE, but doesn't CLOSE // Null command - terminates a READ/WRITE, but doesn't CLOSE
// (leaves record length intact on open buffer) // (leaves record length intact on open buffer)
activebuffer = null; activebuffer = null;