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isNum and operator argument type checking

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Chris Jones 2011-05-04 16:58:51 -05:00
parent 229043c15d
commit 9969a937ce
1 changed files with 10 additions and 2 deletions
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12
pdf.js
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@ -82,6 +82,9 @@ var Obj = (function() {
}); });
} }
constructor.prototype.isNum = function(value) {
return this.isInt(value) || this.isReal(value);
}
constructor.prototype.lookup = function(key) { constructor.prototype.lookup = function(key) {
function lookup(key) { function lookup(key) {
if (!(this.value.contains(key))) if (!(this.value.contains(key)))
@ -718,13 +721,18 @@ var Interpreter = (function() {
var cmd = CMD_TABLE[cmdName]; var cmd = CMD_TABLE[cmdName];
if (!cmd) { if (!cmd) {
this.error("Unknown command '"+ cmdName +"'"); this.error("Unknown command '"+ cmdName +"'");
} else if (!this.typeCheck(cmd, args)) { } else if (!this.typeCheck(cmd.params, args)) {
this.error("Wrong arguments for command '"+ cmdName +"'"); this.error("Wrong arguments for command '"+ cmdName +"'");
} }
return cmd.fn; return cmd.fn;
}, },
typeCheck: function(cmd, args) { typeCheck: function(params, args) {
if (params.length != args.length)
return false;
for (var i = 0; i < params.length; ++i)
if (!args[i]["is"+ params[i]]())
return false;
return true; return true;
}, },
error: function(what) { error: function(what) {