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Added initial support for numeric and string variables.

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git-svn-id: https://shellinabox.googlecode.com/svn/trunk@111 0da03de8-d603-11dd-86c2-0f8696b7b6f9
This commit is contained in:
zodiac 2009-04-08 17:12:07 +00:00
parent f2dc904c0c
commit ea033cbd18
2 changed files with 148 additions and 18 deletions
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83
demo/demo.js
View file

@ -182,6 +182,7 @@ Demo.prototype.error = function(msg) {
};
Demo.prototype.doInit = function() {
this.vars = new Object();
this.program = new Array();
this.vt100(
'\u001Bc\u001B[34;4m' +
@ -285,16 +286,31 @@ Demo.prototype.doCommand = function() {
Demo.prototype.doEval = function() {
this.gotoState(2 /* STATE_PROMPT */);
var token = this.tokens.nextToken();
var token = this.tokens.peekToken();
if (token == "HELP") {
this.vt100('Supported commands:\r\n' +
'ABS ASC ATN CHR$ COS EXP HELP INT LEFT$ LIST LEN LOG MID$\r\n'+
'NEW POS PRINT RIGHT$ RND RUN SGN SIN SPC SQR STR$ TAB TAN\r\n'+
'TI VAL\r\n');
this.tokens.consume();
if (this.tokens.nextToken() != undefined) {
this.error('HELP does not take any arguments');
} else {
this.vt100('Supported commands:\r\n' +
'HELP LET LIST NEW PRINT RUN\r\n'+
'\r\n'+
'Supported functions:\r\n'+
'ABS() ASC() ATN() CHR$() COS() EXP() INT() LEFT$() LEN()\r\n'+
'LOG() MID$() POS() RIGHT$() RND() SGN() SIN() SPC() SQR()\r\n'+
'STR$() TAB() TAN() TI VAL()\r\n');
}
} else if (token == "LET") {
this.tokens.consume();
this.doAssignment();
} else if (token == "LIST") {
this.tokens.consume();
this.doList();
} else if (token == "NEW") {
if (this.currentLineIndex >= 0) {
this.tokens.consume();
if (this.tokens.nextToken() != undefined) {
this.error('NEW does not take any arguments');
} else if (this.currentLineIndex >= 0) {
this.error('Cannot call NEW from a program');
} else if (this.program.length == 0) {
this.ok();
@ -303,9 +319,11 @@ Demo.prototype.doEval = function() {
this.gotoState(7 /* STATE_NEW_Y_N */);
}
} else if (token == "PRINT" || token == "?") {
this.tokens.consume();
this.doPrint();
} else if (token == "RUN") {
if (this.tokens.peekToken() != null) {
this.tokens.consume();
if (this.tokens.nextToken() != null) {
this.error('RUN does not take any parameters');
} else if (this.program.length > 0) {
this.currentLineIndex = 0;
@ -314,11 +332,42 @@ Demo.prototype.doEval = function() {
this.ok();
}
} else {
this.error(token ? 'Unknown command: ' + token : undefined);
this.doAssignment();
}
return false;
};
Demo.prototype.doAssignment = function() {
var id = this.tokens.nextToken();
if (!id || !id.match(/^[A-Za-z][A-Za-z0-9_]*$/)) {
return this.error('Identifier expected');
}
var token = this.tokens.nextToken();
var isString = false;
if (token == '$') {
isString = true;
token = this.tokens.nextToken();
}
if (token != '=') {
return this.error('"=" expected');
}
var value = this.expr();
if (value == undefined) {
return value;
}
if (isString) {
if (value.type() != 0 /* TYPE_STRING */) {
return this.error('String expected');
}
this.vars['str_' + id] = value;
} else {
if (value.type() != 1 /* TYPE_NUMBER */) {
return this.error('Numeric value expected');
}
this.vars['var_' + id] = value;
}
};
Demo.prototype.doList = function() {
var start = undefined;
var stop = undefined;
@ -385,7 +434,6 @@ Demo.prototype.doList = function() {
break;
case '(':
case ')':
case '?':
case '$':
case '%':
case '#':
@ -400,6 +448,9 @@ Demo.prototype.doList = function() {
space = true;
id = false;
break;
case '?':
token = 'PRINT';
// fall thru
default:
this.vt100((id ? ' ' : '') + token);
space = false;
@ -464,6 +515,7 @@ Demo.prototype.doNewYN = function() {
return false;
} else if (ch == 'y' || ch == 'Y') {
this.vt100('Y\r\n');
this.vars = new Object();
this.program.splice(0, this.program.length);
this.keys = this.keys.substr(i);
this.ok();
@ -798,6 +850,19 @@ Demo.prototype.factor = function() {
return this.error('Numeric range error');
}
value = new this.Value(1 /* TYPE_NUMBER */, token, number);
} else if (token.match(/^[A-Za-z][A-Za-z0-9_]*$/)) {
if (this.tokens.peekToken() == '$') {
this.tokens.consume();
value = this.vars['str_' + token];
if (value == undefined) {
value= new this.Value(0 /* TYPE_STRING */, '', '');
}
} else {
value = this.vars['var_' + token];
if (value == undefined) {
value= new this.Value(1 /* TYPE_NUMBER */, '0', 0);
}
}
} else {
return this.error();
}

83
demo/demo.jspp
View file

@ -182,6 +182,7 @@ Demo.prototype.error = function(msg) {
};
Demo.prototype.doInit = function() {
this.vars = new Object();
this.program = new Array();
this.vt100(
'\u001Bc\u001B[34;4m' +
@ -285,16 +286,31 @@ Demo.prototype.doCommand = function() {
Demo.prototype.doEval = function() {
this.gotoState(STATE_PROMPT);
var token = this.tokens.nextToken();
var token = this.tokens.peekToken();
if (token == "HELP") {
this.vt100('Supported commands:\r\n' +
'ABS ASC ATN CHR$ COS EXP HELP INT LEFT$ LIST LEN LOG MID$\r\n'+
'NEW POS PRINT RIGHT$ RND RUN SGN SIN SPC SQR STR$ TAB TAN\r\n'+
'TI VAL\r\n');
this.tokens.consume();
if (this.tokens.nextToken() != undefined) {
this.error('HELP does not take any arguments');
} else {
this.vt100('Supported commands:\r\n' +
'HELP LET LIST NEW PRINT RUN\r\n'+
'\r\n'+
'Supported functions:\r\n'+
'ABS() ASC() ATN() CHR$() COS() EXP() INT() LEFT$() LEN()\r\n'+
'LOG() MID$() POS() RIGHT$() RND() SGN() SIN() SPC() SQR()\r\n'+
'STR$() TAB() TAN() TI VAL()\r\n');
}
} else if (token == "LET") {
this.tokens.consume();
this.doAssignment();
} else if (token == "LIST") {
this.tokens.consume();
this.doList();
} else if (token == "NEW") {
if (this.currentLineIndex >= 0) {
this.tokens.consume();
if (this.tokens.nextToken() != undefined) {
this.error('NEW does not take any arguments');
} else if (this.currentLineIndex >= 0) {
this.error('Cannot call NEW from a program');
} else if (this.program.length == 0) {
this.ok();
@ -303,9 +319,11 @@ Demo.prototype.doEval = function() {
this.gotoState(STATE_NEW_Y_N);
}
} else if (token == "PRINT" || token == "?") {
this.tokens.consume();
this.doPrint();
} else if (token == "RUN") {
if (this.tokens.peekToken() != null) {
this.tokens.consume();
if (this.tokens.nextToken() != null) {
this.error('RUN does not take any parameters');
} else if (this.program.length > 0) {
this.currentLineIndex = 0;
@ -314,11 +332,42 @@ Demo.prototype.doEval = function() {
this.ok();
}
} else {
this.error(token ? 'Unknown command: ' + token : undefined);
this.doAssignment();
}
return false;
};
Demo.prototype.doAssignment = function() {
var id = this.tokens.nextToken();
if (!id || !id.match(/^[A-Za-z][A-Za-z0-9_]*$/)) {
return this.error('Identifier expected');
}
var token = this.tokens.nextToken();
var isString = false;
if (token == '$') {
isString = true;
token = this.tokens.nextToken();
}
if (token != '=') {
return this.error('"=" expected');
}
var value = this.expr();
if (value == undefined) {
return value;
}
if (isString) {
if (value.type() != TYPE_STRING) {
return this.error('String expected');
}
this.vars['str_' + id] = value;
} else {
if (value.type() != TYPE_NUMBER) {
return this.error('Numeric value expected');
}
this.vars['var_' + id] = value;
}
};
Demo.prototype.doList = function() {
var start = undefined;
var stop = undefined;
@ -385,7 +434,6 @@ Demo.prototype.doList = function() {
break;
case '(':
case ')':
case '?':
case '$':
case '%':
case '#':
@ -400,6 +448,9 @@ Demo.prototype.doList = function() {
space = true;
id = false;
break;
case '?':
token = 'PRINT';
// fall thru
default:
this.vt100((id ? ' ' : '') + token);
space = false;
@ -464,6 +515,7 @@ Demo.prototype.doNewYN = function() {
return false;
} else if (ch == 'y' || ch == 'Y') {
this.vt100('Y\r\n');
this.vars = new Object();
this.program.splice(0, this.program.length);
this.keys = this.keys.substr(i);
this.ok();
@ -798,6 +850,19 @@ Demo.prototype.factor = function() {
return this.error('Numeric range error');
}
value = new this.Value(TYPE_NUMBER, token, number);
} else if (token.match(/^[A-Za-z][A-Za-z0-9_]*$/)) {
if (this.tokens.peekToken() == '$') {
this.tokens.consume();
value = this.vars['str_' + token];
if (value == undefined) {
value= new this.Value(TYPE_STRING, '', '');
}
} else {
value = this.vars['var_' + token];
if (value == undefined) {
value= new this.Value(TYPE_NUMBER, '0', 0);
}
}
} else {
return this.error();
}