169 lines
4.9 KiB
Plaintext
169 lines
4.9 KiB
Plaintext
%lex
|
|
|
|
%x script
|
|
|
|
%%
|
|
|
|
// Inline JavaScript State (gobble up all tokens including whitespace)
|
|
|
|
"{{=" %{ this.begin("script"); return "SCRIPT_EVAL"; %}
|
|
"{{!" %{ this.begin("script"); return "SCRIPT_EXEC"; %}
|
|
<script>([^\}]|\n|\}[^}]) return "SCRIPT_TOKEN";
|
|
<script>"}}" this.popState()
|
|
|
|
|
|
// Assembler State
|
|
|
|
// Ignorables
|
|
([;][^\n]*\n) // Ignore comments
|
|
(\s+) // Ignore Whitespace
|
|
|
|
// Identifiers (and opcodes)
|
|
([A-Za-z][A-Za-z0-9]*) return "ID"
|
|
|
|
// Lists
|
|
"(" return "OPEN_PAREN"
|
|
")" return "CLOSE_PAREN"
|
|
"," return "COMMA"
|
|
|
|
// Labels prefixes
|
|
([@][A-Za-z][A-Za-z0-9]*) return "AT_ID"
|
|
([#][A-Za-z][A-Za-z0-9]*) return "HASH_ID"
|
|
([$][A-Za-z][A-Za-z0-9]*) return "DOLLAR_ID"
|
|
|
|
// Scope
|
|
"{" return "OPEN_BRACE"
|
|
"}" return "CLOSE_BRACE"
|
|
":" return "COLON"
|
|
|
|
// Data
|
|
"[" return "OPEN_BRACKET"
|
|
"]" return "CLOSE_BRACKET"
|
|
|
|
// Literals
|
|
(0x([0-9a-fA-F][0-9a-fA-F])*) return "HEX"
|
|
([1-9][0-9]*|0) return "DECIMAL"
|
|
//(0b[01]*) return "BINARY"
|
|
|
|
// Special
|
|
<<EOF>> return "EOF"
|
|
return "INVALID"
|
|
|
|
/lex
|
|
|
|
%start program
|
|
|
|
%%
|
|
|
|
program
|
|
: statement_list EOF
|
|
{ return { type: "scope", name: "_", statements: $1, loc: getLoc(yy, null) }; }
|
|
;
|
|
|
|
javascript
|
|
: /* empty */
|
|
{ $$ = ""; }
|
|
| SCRIPT_TOKEN javascript
|
|
{ $$ = $1 + $2; }
|
|
;
|
|
|
|
opcode_list
|
|
: opcode
|
|
{ $$ = [ $1 ]; }
|
|
| opcode COMMA opcode_list
|
|
{ {
|
|
const opcodes = $3.slice();
|
|
opcodes.unshift($1);
|
|
$$ = opcodes;
|
|
} }
|
|
;
|
|
|
|
opcode
|
|
: ID
|
|
{ $$ = { type: "opcode", bare: true, mnemonic: $1, operands: [ ], loc: getLoc(yy, @1) }; }
|
|
| ID OPEN_PAREN CLOSE_PAREN
|
|
{ $$ = { type: "opcode", mnemonic: $1, operands: [ ], loc: getLoc(yy, @1, @3) }; }
|
|
| ID OPEN_PAREN opcode_list CLOSE_PAREN
|
|
{ $$ = { type: "opcode", mnemonic: $1, operands: $3, loc: getLoc(yy, @1, @4) }; }
|
|
| HASH_ID
|
|
{ $$ = { type: "length", label: $1.substring(1), loc: getLoc(yy, @1) }; }
|
|
| DOLLAR_ID
|
|
{ $$ = { type: "offset", label: $1.substring(1), loc: getLoc(yy, @1) }; }
|
|
| HEX
|
|
{ $$ = { type: "hex", value: $1, loc: getLoc(yy, @1) }; }
|
|
| DECIMAL
|
|
{ $$ = { type: "decimal", value: $1, loc: getLoc(yy, @1) }; }
|
|
| SCRIPT_EVAL javascript
|
|
{ $$ = { type: "eval", script: $2, loc: getLoc(yy, @1, @2) }; }
|
|
;
|
|
|
|
hex_list
|
|
: /* empty */
|
|
{ $$ = [ ]; }
|
|
| hex hex_list
|
|
{ {
|
|
const hexes = $2.slice();;
|
|
hexes.unshift($1);
|
|
$$ = hexes;
|
|
} }
|
|
;
|
|
|
|
hex
|
|
: HEX
|
|
{ $$ = { type: "hex", verbatim: true, value: $1, loc: getLoc(yy, @1) }; }
|
|
| DECIMAL
|
|
{ {
|
|
const value = parseInt($1);
|
|
if (value >= 256) { throw new Error("decimal data values must be single bytes"); }
|
|
$$ = { type: "hex", verbatim: true, value: ("0x" + (value).toString(16)), loc: getLoc(yy, @1) };
|
|
} }
|
|
| SCRIPT_EVAL javascript
|
|
{ $$ = { type: "eval", verbatim: true, script: $2, loc: getLoc(yy, @1, @2) }; }
|
|
;
|
|
|
|
statement_list
|
|
: /* empty */
|
|
{ $$ = [ ]; }
|
|
| statement statement_list
|
|
{ {
|
|
const statements = $2.slice();
|
|
statements.unshift($1);
|
|
$$ = statements;
|
|
} }
|
|
;
|
|
|
|
statement
|
|
: opcode
|
|
| AT_ID COLON
|
|
{ $$ = { type: "label", name: $1.substring(1), loc: getLoc(yy, @1, @2) }; }
|
|
| AT_ID OPEN_BRACE statement_list CLOSE_BRACE
|
|
{ $$ = { type: "scope", name: $1.substring(1), statements: $3, loc: getLoc(yy, @1, @4) }; }
|
|
| AT_ID OPEN_BRACKET hex_list CLOSE_BRACKET
|
|
{ $$ = { type: "data", name: $1.substring(1), data: $3, loc: getLoc(yy, @1, @4) }; }
|
|
| SCRIPT_EXEC javascript
|
|
{ $$ = { type: "exec", script: $2, loc: getLoc(yy, @1, @2) }; }
|
|
;
|
|
|
|
%%
|
|
|
|
function getLoc(yy, start, end) {
|
|
if (end == null) { end = start; }
|
|
|
|
let result = null;
|
|
if (start) {
|
|
result = {
|
|
first_line: start.first_line,
|
|
first_column: start.first_column,
|
|
last_line: end.last_line,
|
|
last_column: end.last_column
|
|
};
|
|
}
|
|
|
|
if (yy._ethersLocation) {
|
|
return yy._ethersLocation(result);
|
|
}
|
|
|
|
return Object.freeze(result);
|
|
}
|
|
|