Added "NEW" command to demo BASIC interpreter. Still not very useful, but we
now have some of the basic framework in place to implement a minimalistic interpreter. git-svn-id: https://shellinabox.googlecode.com/svn/trunk@102 0da03de8-d603-11dd-86c2-0f8696b7b6f9
This commit is contained in:
parent
81845fd5f7
commit
312b2853f5
5 changed files with 183 additions and 97 deletions
2
config.h
2
config.h
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@ -95,7 +95,7 @@
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#define STDC_HEADERS 1
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/* Most recent revision number in the version control system */
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#define VCS_REVISION "101"
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#define VCS_REVISION "102"
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/* Version number of package */
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#define VERSION "2.5"
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2
configure
vendored
2
configure
vendored
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@ -2056,7 +2056,7 @@ ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $
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ac_compiler_gnu=$ac_cv_c_compiler_gnu
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VCS_REVISION=101
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VCS_REVISION=102
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cat >>confdefs.h <<_ACEOF
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@ -2,7 +2,7 @@ AC_PREREQ(2.57)
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dnl This is the one location where the authoritative version number is stored
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AC_INIT(shellinabox, 2.5, markus@shellinabox.com)
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VCS_REVISION=101
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VCS_REVISION=102
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AC_SUBST(VCS_REVISION)
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AC_DEFINE_UNQUOTED(VCS_REVISION, "${VCS_REVISION}",
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[Most recent revision number in the version control system])
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115
demo/demo.js
115
demo/demo.js
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@ -69,8 +69,8 @@
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// #define STATE_READLINE 3
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// #define STATE_COMMAND 4
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// #define STATE_EVAL 5
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// #define STATE_RUN 6
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// #define STATE_EXEC 7
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// #define STATE_EXEC 6
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// #define STATE_NEW_Y_N 7
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function extend(subClass, baseClass) {
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function inheritance() { }
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@ -87,6 +87,16 @@ function Demo(container) {
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extend(Demo, VT100);
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Demo.prototype.keysPressed = function(ch) {
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if (this.state == 6 /* STATE_EXEC */) {
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for (var i = 0; i < ch.length; i++) {
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var c = ch.charAt(i);
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if (c == '\u0003') {
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this.keys = '';
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this.error('Interrupted');
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return;
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}
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}
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}
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this.keys += ch;
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this.gotoState(this.state);
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};
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@ -97,7 +107,7 @@ Demo.prototype.gotoState = function(state, tmo) {
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if (!tmo) {
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tmo = 1;
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}
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this.timer = setTimeout(function(demo) {
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this.nextTimer = setTimeout(function(demo) {
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return function() {
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demo.demo();
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};
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@ -107,35 +117,31 @@ Demo.prototype.gotoState = function(state, tmo) {
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Demo.prototype.demo = function() {
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var done = false;
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this.nextTimer = undefined;
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while (!done) {
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var state = this.state;
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this.state = 0 /* STATE_IDLE */;
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switch (state) {
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case 1 /* STATE_INIT */:
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this.doInit();
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done = this.doInit();
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break;
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case 2 /* STATE_PROMPT */:
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this.doPrompt();
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done = this.doPrompt();
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break;
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case 3 /* STATE_READLINE */:
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this.doReadLine();
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if (this.state == 3 /* STATE_READLINE */) {
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done = true;
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}
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done = this.doReadLine();
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break;
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case 4 /* STATE_COMMAND */:
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this.doCommand();
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done = this.doCommand();
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break;
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case 5 /* STATE_EVAL */:
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this.doEval();
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done = this.doEval();
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break;
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case 6 /* STATE_RUN */:
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this.doRun();
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case 6 /* STATE_EXEC */:
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done = this.doExec();
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break;
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case 7 /* STATE_EXEC */:
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if (this.doExec()) {
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return;
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}
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case 7 /* STATE_NEW_Y_N */:
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done = this.doNewYN();
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break;
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case 0 /* STATE_IDLE */:
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default:
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@ -143,15 +149,22 @@ Demo.prototype.demo = function() {
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break;
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}
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}
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this.timer = undefined;
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this.timer = this.nextTimer;
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this.nextTimer = undefined;
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};
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Demo.prototype.ok = function() {
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this.vt100('OK\r\n');
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this.gotoState(2 /* STATE_PROMPT */);
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}
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Demo.prototype.error = function(msg) {
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if (msg == undefined) {
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msg = 'Syntax Error';
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}
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this.vt100('\u0007? ' + msg + '\r\n');
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this.gotoState(2 /* STATE_PROMPT */);
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this.currentLineIndex = -1;
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};
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Demo.prototype.doInit = function() {
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@ -170,6 +183,7 @@ Demo.prototype.doInit = function() {
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'Type HELP for a list of commands.\r\n' +
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'\r\n');
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this.gotoState(2 /* STATE_PROMPT */);
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return false;
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};
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Demo.prototype.doPrompt = function() {
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@ -178,6 +192,7 @@ Demo.prototype.doPrompt = function() {
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this.currentLineIndex = -1;
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this.vt100('> ');
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this.gotoState(3 /* STATE_READLINE */);
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return false;
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};
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Demo.prototype.doReadLine = function() {
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@ -192,6 +207,7 @@ Demo.prototype.doReadLine = function() {
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} else if (ch == '\r' || ch == '\n') {
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this.vt100('\r\n');
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this.gotoState(4 /* STATE_COMMAND */);
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return false;
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} else if (ch == '\u0008' || ch == '\u007F') {
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if (this.line.length > 0) {
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this.line = this.line.substr(0, this.line.length - 1);
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@ -212,6 +228,7 @@ Demo.prototype.doReadLine = function() {
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break;
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}
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}
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return true;
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};
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Demo.prototype.doCommand = function() {
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@ -244,8 +261,9 @@ Demo.prototype.doCommand = function() {
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this.tokens = tokens;
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this.gotoState(5 /* STATE_EVAL */);
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}
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tokens.reset();
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}
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tokens.reset();
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return false;
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};
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Demo.prototype.doEval = function() {
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@ -253,11 +271,10 @@ Demo.prototype.doEval = function() {
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var cmd = this.tokens.nextToken().toUpperCase();
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if (cmd == "HELP") {
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this.vt100('Supported commands:\r\n' +
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' HELP LIST RUN\r\n');
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' HELP LIST NEW RUN\r\n');
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} else if (cmd == "LIST") {
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if (this.tokens.nextToken() != undefined) {
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this.error();
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return false;
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} else {
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for (var i = 0; i < this.program.length; i++) {
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var line = this.program[i];
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this.vt100('\r\n');
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}
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}
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} else if (cmd == "NEW") {
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if (this.currentLineIndex >= 0) {
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this.error('Cannot call NEW from a program');
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} else if (this.program.length == 0) {
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this.ok();
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} else {
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this.vt100('Do you really want to delete the program (y/N) ');
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this.gotoState(7 /* STATE_NEW_Y_N */);
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}
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} else if (cmd == "RUN") {
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if (this.tokens.nextToken() != undefined) {
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this.error();
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} else if (this.program.length > 0) {
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this.currentLineIndex = 0;
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this.gotoState(6 /* STATE_EXEC */);
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} else {
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this.gotoState(6 /* STATE_RUN */);
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this.ok();
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}
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return false;
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} else {
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this.error();
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}
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return false;
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}
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return true;
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};
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Demo.prototype.doRun = function() {
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if (this.program.length > 0) {
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this.currentLineIndex = 0;
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this.gotoState(7 /* STATE_EXEC */);
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}
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};
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Demo.prototype.doExec = function() {
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this.tokens = this.program[this.currentLineIndex++].tokens();
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this.tokens.reset();
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if (this.doEval()) {
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if (this.currentLineIndex >= this.program.length) {
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this.gotoState(2 /* STATE_PROMPT */);
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this.doEval();
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if (this.currentLineIndex < 0) {
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return false;
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} else if (this.currentLineIndex >= this.program.length) {
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this.ok();
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return false;
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} else {
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this.gotoState(7 /* STATE_EXEC */, 20);
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this.gotoState(6 /* STATE_EXEC */, 20);
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return true;
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}
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};
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Demo.prototype.doNewYN = function() {
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for (var i = 0; i < this.keys.length; ) {
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var ch = this.keys.charAt(i++);
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if (ch == 'n' || ch == 'N' || ch == '\r' || ch == '\n') {
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this.vt100('N\r\n');
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this.keys = this.keys.substr(i);
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this.error('Aborted');
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return false;
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} else if (ch == 'y' || ch == 'Y') {
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this.vt100('Y\r\n');
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this.program.splice(0, this.program.length);
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this.keys = this.keys.substr(i);
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this.ok();
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return false;
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} else {
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this.vt100('\u0007');
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}
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}
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this.gotoState(7 /* STATE_NEW_Y_N */);
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return true;
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};
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Demo.prototype.findLine = function(lineNumber) {
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117
demo/demo.jspp
117
demo/demo.jspp
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#define STATE_READLINE 3
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#define STATE_COMMAND 4
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#define STATE_EVAL 5
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#define STATE_RUN 6
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#define STATE_EXEC 7
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#define STATE_EXEC 6
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#define STATE_NEW_Y_N 7
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function extend(subClass, baseClass) {
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function inheritance() { }
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@ -87,6 +87,16 @@ function Demo(container) {
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extend(Demo, VT100);
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Demo.prototype.keysPressed = function(ch) {
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if (this.state == STATE_EXEC) {
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for (var i = 0; i < ch.length; i++) {
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var c = ch.charAt(i);
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if (c == '\u0003') {
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this.keys = '';
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this.error('Interrupted');
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return;
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}
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}
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}
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this.keys += ch;
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this.gotoState(this.state);
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};
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@ -97,7 +107,7 @@ Demo.prototype.gotoState = function(state, tmo) {
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if (!tmo) {
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tmo = 1;
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}
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this.timer = setTimeout(function(demo) {
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this.nextTimer = setTimeout(function(demo) {
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return function() {
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demo.demo();
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};
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@ -107,35 +117,31 @@ Demo.prototype.gotoState = function(state, tmo) {
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Demo.prototype.demo = function() {
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var done = false;
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this.nextTimer = undefined;
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while (!done) {
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var state = this.state;
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this.state = STATE_IDLE;
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switch (state) {
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case STATE_INIT:
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this.doInit();
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done = this.doInit();
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break;
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case STATE_PROMPT:
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this.doPrompt();
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done = this.doPrompt();
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break;
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case STATE_READLINE:
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this.doReadLine();
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if (this.state == STATE_READLINE) {
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done = true;
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}
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done = this.doReadLine();
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break;
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case STATE_COMMAND:
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this.doCommand();
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done = this.doCommand();
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break;
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case STATE_EVAL:
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this.doEval();
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break;
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case STATE_RUN:
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this.doRun();
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done = this.doEval();
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break;
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case STATE_EXEC:
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if (this.doExec()) {
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return;
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}
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done = this.doExec();
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break;
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case STATE_NEW_Y_N:
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done = this.doNewYN();
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break;
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case STATE_IDLE:
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default:
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@ -143,15 +149,22 @@ Demo.prototype.demo = function() {
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break;
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}
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}
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this.timer = undefined;
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this.timer = this.nextTimer;
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this.nextTimer = undefined;
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};
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Demo.prototype.ok = function() {
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this.vt100('OK\r\n');
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this.gotoState(STATE_PROMPT);
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}
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Demo.prototype.error = function(msg) {
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if (msg == undefined) {
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msg = 'Syntax Error';
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}
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this.vt100('\u0007? ' + msg + '\r\n');
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this.gotoState(STATE_PROMPT);
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this.currentLineIndex = -1;
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};
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Demo.prototype.doInit = function() {
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|
@ -170,6 +183,7 @@ Demo.prototype.doInit = function() {
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'Type HELP for a list of commands.\r\n' +
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'\r\n');
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this.gotoState(STATE_PROMPT);
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return false;
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};
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Demo.prototype.doPrompt = function() {
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@ -178,6 +192,7 @@ Demo.prototype.doPrompt = function() {
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this.currentLineIndex = -1;
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this.vt100('> ');
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this.gotoState(STATE_READLINE);
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return false;
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};
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Demo.prototype.doReadLine = function() {
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|
@ -192,6 +207,7 @@ Demo.prototype.doReadLine = function() {
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} else if (ch == '\r' || ch == '\n') {
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this.vt100('\r\n');
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this.gotoState(STATE_COMMAND);
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return false;
|
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} else if (ch == '\u0008' || ch == '\u007F') {
|
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if (this.line.length > 0) {
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this.line = this.line.substr(0, this.line.length - 1);
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|
@ -212,6 +228,7 @@ Demo.prototype.doReadLine = function() {
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break;
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}
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}
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return true;
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};
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Demo.prototype.doCommand = function() {
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|
@ -244,8 +261,9 @@ Demo.prototype.doCommand = function() {
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this.tokens = tokens;
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this.gotoState(STATE_EVAL);
|
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}
|
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tokens.reset();
|
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}
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tokens.reset();
|
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return false;
|
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};
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|
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Demo.prototype.doEval = function() {
|
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|
@ -253,11 +271,10 @@ Demo.prototype.doEval = function() {
|
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var cmd = this.tokens.nextToken().toUpperCase();
|
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if (cmd == "HELP") {
|
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this.vt100('Supported commands:\r\n' +
|
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' HELP LIST RUN\r\n');
|
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' HELP LIST NEW RUN\r\n');
|
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} else if (cmd == "LIST") {
|
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if (this.tokens.nextToken() != undefined) {
|
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this.error();
|
||||
return false;
|
||||
} else {
|
||||
for (var i = 0; i < this.program.length; i++) {
|
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var line = this.program[i];
|
||||
|
@ -270,39 +287,65 @@ Demo.prototype.doEval = function() {
|
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this.vt100('\r\n');
|
||||
}
|
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}
|
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} else if (cmd == "NEW") {
|
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if (this.currentLineIndex >= 0) {
|
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this.error('Cannot call NEW from a program');
|
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} else if (this.program.length == 0) {
|
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this.ok();
|
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} else {
|
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this.vt100('Do you really want to delete the program (y/N) ');
|
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this.gotoState(STATE_NEW_Y_N);
|
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}
|
||||
} else if (cmd == "RUN") {
|
||||
if (this.tokens.nextToken() != undefined) {
|
||||
this.error();
|
||||
} else {
|
||||
this.gotoState(STATE_RUN);
|
||||
}
|
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return false;
|
||||
} else {
|
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this.error();
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
};
|
||||
|
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Demo.prototype.doRun = function() {
|
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if (this.program.length > 0) {
|
||||
} else if (this.program.length > 0) {
|
||||
this.currentLineIndex = 0;
|
||||
this.gotoState(STATE_EXEC);
|
||||
} else {
|
||||
this.ok();
|
||||
}
|
||||
} else {
|
||||
this.error();
|
||||
}
|
||||
return false;
|
||||
};
|
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|
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Demo.prototype.doExec = function() {
|
||||
this.tokens = this.program[this.currentLineIndex++].tokens();
|
||||
this.tokens.reset();
|
||||
if (this.doEval()) {
|
||||
if (this.currentLineIndex >= this.program.length) {
|
||||
this.gotoState(STATE_PROMPT);
|
||||
this.doEval();
|
||||
if (this.currentLineIndex < 0) {
|
||||
return false;
|
||||
} else if (this.currentLineIndex >= this.program.length) {
|
||||
this.ok();
|
||||
return false;
|
||||
} else {
|
||||
this.gotoState(STATE_EXEC, 20);
|
||||
return true;
|
||||
}
|
||||
};
|
||||
|
||||
Demo.prototype.doNewYN = function() {
|
||||
for (var i = 0; i < this.keys.length; ) {
|
||||
var ch = this.keys.charAt(i++);
|
||||
if (ch == 'n' || ch == 'N' || ch == '\r' || ch == '\n') {
|
||||
this.vt100('N\r\n');
|
||||
this.keys = this.keys.substr(i);
|
||||
this.error('Aborted');
|
||||
return false;
|
||||
} else if (ch == 'y' || ch == 'Y') {
|
||||
this.vt100('Y\r\n');
|
||||
this.program.splice(0, this.program.length);
|
||||
this.keys = this.keys.substr(i);
|
||||
this.ok();
|
||||
return false;
|
||||
} else {
|
||||
this.vt100('\u0007');
|
||||
}
|
||||
}
|
||||
this.gotoState(STATE_NEW_Y_N);
|
||||
return true;
|
||||
};
|
||||
|
||||
Demo.prototype.findLine = function(lineNumber) {
|
||||
|
|
Loading…
Reference in a new issue