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Added native function support

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This commit is contained in:
Mitchell Plamann
2015-04-06 02:22:37 -04:00
parent 30e983e656
commit 3278bfe6c4
4 changed files with 199 additions and 22 deletions
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110
src/c0ffi.js Normal file
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@@ -0,0 +1,110 @@
exports.NATIVE_FADD = 0
exports.NATIVE_FDIV = 1
exports.NATIVE_FLESS = 2
exports.NATIVE_FMUL = 3
exports.NATIVE_FSUB = 4
exports.NATIVE_FTOI = 5
exports.NATIVE_ITOF = 6
exports.NATIVE_PRINT_FPT = 7
exports.NATIVE_PRINT_HEX = 8
exports.NATIVE_PRINT_INT = 9
/* args */
exports.NATIVE_ARGS_FLAG = 10
exports.NATIVE_ARGS_INT = 11
exports.NATIVE_ARGS_PARSE = 12
exports.NATIVE_ARGS_STRING = 13
/* conio */
exports.NATIVE_EOF = 14
exports.NATIVE_FLUSH = 15
exports.NATIVE_PRINT = 16
exports.NATIVE_PRINTBOOL = 17
exports.NATIVE_PRINTCHAR = 18
exports.NATIVE_PRINTINT = 19
exports.NATIVE_PRINTLN = 20
exports.NATIVE_READLINE = 21
/* curses */
exports.NATIVE_C_ADDCH = 22
exports.NATIVE_C_CBREAK = 23
exports.NATIVE_C_CURS_SET = 24
exports.NATIVE_C_DELCH = 25
exports.NATIVE_C_ENDWIN = 26
exports.NATIVE_C_ERASE = 27
exports.NATIVE_C_GETCH = 28
exports.NATIVE_C_INITSCR = 29
exports.NATIVE_C_KEYPAD = 30
exports.NATIVE_C_MOVE = 31
exports.NATIVE_C_NOECHO = 32
exports.NATIVE_C_REFRESH = 33
exports.NATIVE_C_SUBWIN = 34
exports.NATIVE_C_WADDCH = 35
exports.NATIVE_C_WADDSTR = 36
exports.NATIVE_C_WCLEAR = 37
exports.NATIVE_C_WERASE = 38
exports.NATIVE_C_WMOVE = 39
exports.NATIVE_C_WREFRESH = 40
exports.NATIVE_C_WSTANDEND = 41
exports.NATIVE_C_WSTANDOUT = 42
exports.NATIVE_CC_GETBEGX = 43
exports.NATIVE_CC_GETBEGY = 44
exports.NATIVE_CC_GETMAXX = 45
exports.NATIVE_CC_GETMAXY = 46
exports.NATIVE_CC_GETX = 47
exports.NATIVE_CC_GETY = 48
exports.NATIVE_CC_HIGHLIGHT = 49
exports.NATIVE_CC_KEY_IS_BACKSPACE = 50
exports.NATIVE_CC_KEY_IS_DOWN = 51
exports.NATIVE_CC_KEY_IS_ENTER = 52
exports.NATIVE_CC_KEY_IS_LEFT = 53
exports.NATIVE_CC_KEY_IS_RIGHT = 54
exports.NATIVE_CC_KEY_IS_UP = 55
exports.NATIVE_CC_WBOLDOFF = 56
exports.NATIVE_CC_WBOLDON = 57
exports.NATIVE_CC_WDIMOFF = 58
exports.NATIVE_CC_WDIMON = 59
exports.NATIVE_CC_WREVERSEOFF = 60
exports.NATIVE_CC_WREVERSEON = 61
exports.NATIVE_CC_WUNDEROFF = 62
exports.NATIVE_CC_WUNDERON = 63
/* file */
exports.NATIVE_FILE_CLOSE = 64
exports.NATIVE_FILE_CLOSED = 65
exports.NATIVE_FILE_EOF = 66
exports.NATIVE_FILE_READ = 67
exports.NATIVE_FILE_READLINE = 68
/* img */
exports.NATIVE_IMAGE_CLONE = 69
exports.NATIVE_IMAGE_CREATE = 70
exports.NATIVE_IMAGE_DATA = 71
exports.NATIVE_IMAGE_DESTROY = 72
exports.NATIVE_IMAGE_HEIGHT = 73
exports.NATIVE_IMAGE_LOAD = 74
exports.NATIVE_IMAGE_SAVE = 75
exports.NATIVE_IMAGE_SUBIMAGE = 76
exports.NATIVE_IMAGE_WIDTH = 77
/* parse */
exports.NATIVE_PARSE_BOOL = 78
exports.NATIVE_PARSE_INT = 79
/* string */
exports.NATIVE_CHAR_CHR = 80
exports.NATIVE_CHAR_ORD = 81
exports.NATIVE_STRING_CHARAT = 82
exports.NATIVE_STRING_COMPARE = 83
exports.NATIVE_STRING_EQUAL = 84
exports.NATIVE_STRING_FROM_CHARARRAY = 85
exports.NATIVE_STRING_FROMBOOL = 86
exports.NATIVE_STRING_FROMCHAR = 87
exports.NATIVE_STRING_FROMINT = 88
exports.NATIVE_STRING_JOIN = 89
exports.NATIVE_STRING_LENGTH = 90
exports.NATIVE_STRING_SUB = 91
exports.NATIVE_STRING_TERMINATED = 92
exports.NATIVE_STRING_TO_CHARARRAY = 93
exports.NATIVE_STRING_TOLOWER = 94

60
src/c0vm.js
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@@ -9,7 +9,11 @@ function log(message) {
}
function c0_assertion_failure(val) {
throw "c0 assertion failure: " + val;
throw ("c0 assertion failure: " + val);
}
function c0_memory_error(val) {
throw ("c0 memory error: " + val);
}
var StackFrame = function(file, f) {
@@ -23,7 +27,7 @@ var StackFrame = function(file, f) {
this.file = file;
}
var ProgramState = function(parsed_file) {
var ProgramState = function(parsed_file, callback_dict) {
log("Creating program state with file " + parsed_file);
var main_function = parsed_file.function_pool[0];
@@ -31,6 +35,19 @@ var ProgramState = function(parsed_file) {
this.call_stack = [];
this.file = parsed_file;
this.natives = {};
for (var i = 0; i < 95; i++) {
try {
this.natives[i] = callback_dict[i];
} catch (key_not_found) {
dict[i] = function (arg) {
console.log("Native function " + name + " called, ran method stub.");
return 0;
};
}
}
// Memory is just a big array of bytes, right?
// "Allocation" is appending onto this array
// A pointer to memory is an index into this array.
@@ -108,7 +125,7 @@ ProgramState.prototype.step = function() {
case op.RETURN:
var retVal = this.pop();
if (this.call_stack.length == 0)
throw retVal;
return retVal;
this.frame = this.call_stack.pop();
this.push(retVal);
@@ -183,7 +200,6 @@ ProgramState.prototype.step = function() {
this.frame.pc++;
var y = this.pop();
var x = this.pop();
console.log("y="+y+", x="+x);
if (y < 0 || y > 31) c0_arith_error("Shifting by too many bits");
this.push(x>>y);
break;
@@ -276,6 +292,30 @@ ProgramState.prototype.step = function() {
this.frame = newFrame;
break;
case op.INVOKENATIVE:
var c1 = this.frame.program[this.frame.pc+1];
var c2 = this.frame.program[this.frame.pc+2];
this.frame.pc += 3;
var index = (c1 << 8) + c2;
var f = this.file.native_pool[index];
var arg_array = [];
for (var i = f.num_args - 1; i >= 0; i--)
arg_array[i] = this.pop();
var native_function = this.natives[f.function_table_index];
if (native_function === undefined) {
native_function = function (ignored) {
console.log("Could not find native function with index " +
f.function_table_index);
return 0;
};
console.log("Unknown native function index " + f.function_table_index);
}
this.push(native_function(arg_array));
break;
// Memory allocation operations:
case op.NEW:
@@ -354,7 +394,6 @@ ProgramState.prototype.step = function() {
" (" + opcode_name + ")\n");
throw "Error - unknown opcode";
}
return false;
}
// Takes in a parsed .bc0 file and runs it
@@ -362,18 +401,13 @@ function execute(file, callbacks, v) {
verbose = typeof v !== 'undefined' ? v : true;
log("Initializing with file " + file);
var state = new ProgramState(file);
var state = new ProgramState(file, callbacks);
log("Beginning execution");
while (true) {
// I'm not sure how to structure this control flow yet,
// so if anyone has a better idea, let me know
try {
state.step();
} catch (val) {
return val;
}
var val = state.step();
if (val !== undefined) return val;
// if (at_breakpoint) {
// save state (maybe in a global in this file?)

14
src/index.js
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@@ -1,5 +1,6 @@
parser = require("./bytecode-parser");
c0vm = require("./c0vm.js");
c0ffi = require("./c0ffi.js");
// console.log("Reading in sample bytecode file:");
// console.log(parser.getBytes("../test/test.bc0"));
@@ -9,5 +10,14 @@ c0vm = require("./c0vm.js");
// console.log(file);
// console.log(file.function_pool[0].code);
var file = parser.parse("../test/iadd.c0.bc0");
console.log("Result is " + c0vm.execute(file));
callbacks = {};
callbacks[c0ffi.NATIVE_PRINT] = function(args) {
console.log("Print function says: " + args[0]);
}
callbacks["printint"] = function(args) {
console.log("Printint function says: " + args[0]);
}
var file = parser.parse("../test/sample2.5.c0.bc0");
console.log("Result is " + c0vm.execute(file, callbacks));

37
test/tests.js
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@@ -1,7 +1,21 @@
parser = require("../src/bytecode-parser.js")
c0vm = require("../src/c0vm.js")
parser = require("../src/bytecode-parser.js");
c0vm = require("../src/c0vm.js");
c0ffi = require("../src/c0ffi.js");
var callbacks = {}
var printout = "";
callbacks[c0ffi.NATIVE_PRINT] = function(args) {
printout += args[0];
}
callbacks[c0ffi.NATIVE_PRINTINT] = function(args) {
printout += args[0];
}
callbacks[c0ffi.NATIVE_PRINTLN] = function(args) {
printout += (args[0] + "\n");
}
function doTest(filename, expected_result) {
return function(test) {
@@ -16,8 +30,10 @@ function doTest(filename, expected_result) {
exports.testIADD = doTest("iadd.c0.bc0", -2);
exports.testPrint = function(test) {
printout = "";
var result = c0vm.execute(parser.parse("test.bc0"), callbacks, false);
test.ok(result == 0, "test.bc0 - Did not print to screen correctly");
test.ok(printout == "Hello, world.\nYou don't look so good.\n",
"test.bc0 - Did not print to screen correctly: output was " + printout);
test.done();
}
@@ -29,7 +45,9 @@ exports.testMID = doTest("mid.c0.bc0", 155);
// This one should throw an exception because an assertion fails
exports.testSample25 = function(test) {
test.throws(c0vm.execute(parser.parse("sample2.5.c0.bc0"), callbacks, false));
test.throws(function () {
c0vm.execute(parser.parse("sample2.5.c0.bc0"), callbacks, false)
});
test.done();
}
@@ -38,13 +56,18 @@ exports.testIF = doTest("testif.c0.bc0", 32);
exports.testDSQUARED = doTest("dsquared.c0.bc0", 17068);
exports.testArrays = function(test) {
var result = c0vm.execute(parser.parse("arrays.c0.bc0"), callbacks, false);
test.ok(false, "test.bc0 - Did not print to screen correctly");
test.throws(function () {
c0vm.execute(parser.parse("arrays.c0.bc0"), callbacks, true)
});
test.done();
}
exports.testStructs = function(test) {
printout = "";
var result = c0vm.execute(parser.parse("structs.c0.bc0"), callbacks, false);
test.ok(false, "test.bc0 - Did not print to screen correctly");
test.ok(printout == "expected result here",
"structs.c0.bc0 - Did not print to screen correctly, result was " +
printout);
test.done();
}