/*!
Do parse.
\return TRUE if parsing was successful, otherwise FALSE
*/
syx_bool
syx_parser_parse (SyxParser *self, syx_bool skip_message_pattern)
{
SyxToken token;
SyxParserScope scope;
token = syx_lexer_next_token (self->lexer);
if (token.type == SYX_TOKEN_END)
return TRUE;
if (skip_message_pattern)
{
scope.start = self->_argument_names_top;
scope.end = self->_argument_names_top;
self->_argument_scopes.stack[(syx_int32) self->_argument_scopes.top++] = scope;
}
else
_syx_parser_parse_message_pattern (self);
if (!self->_in_block)
_syx_parser_parse_primitive (self);
_syx_parser_parse_temporaries (self);
if (self->_in_block)
syx_bytecode_push_constant (self->bytecode, SYX_BYTECODE_CONST_NIL);
_syx_parser_parse_body (self);
syx_bytecode_do_special (self->bytecode, SYX_BYTECODE_SELF_RETURN);
SYX_CODE_BYTECODES(self->method) = syx_byte_array_new_ref (self->bytecode->code_top * sizeof (syx_uint16),
(syx_uint8 *)self->bytecode->code);
SYX_CODE_LITERALS(self->method) = syx_array_new_ref (self->bytecode->literals_top,
self->bytecode->literals);
if (self->_in_block)
SYX_BLOCK_ARGUMENT_STACK_TOP(self->method) = syx_small_integer_new (self->_argument_scopes.stack[self->_argument_scopes.top-1].start);
else
{
SYX_METHOD_ARGUMENT_STACK_SIZE(self->method) = syx_small_integer_new (self->_argument_names_top);
SYX_METHOD_TEMPORARY_STACK_SIZE(self->method) = syx_small_integer_new (self->_temporary_names_top);
}
SYX_CODE_STACK_SIZE(self->method) = syx_small_integer_new (self->bytecode->stack_size + 1);
SYX_CODE_TEXT(self->method) = syx_string_new (self->lexer->text +
syx_find_first_non_whitespace (self->lexer->text));
SYX_CODE_CLASS(self->method) = self->klass;
return TRUE;
}
static void
_syx_parser_parse_statement (SyxParser *self)
{
SyxToken token = syx_lexer_get_last_token (self->lexer);
if (token.type == SYX_TOKEN_BINARY && !strcmp (token.value.string, "^"))
{
syx_token_free (token);
syx_lexer_next_token (self->lexer);
_syx_parser_parse_expression (self);
syx_bytecode_do_special (self->bytecode, SYX_BYTECODE_STACK_RETURN);
}
else
_syx_parser_parse_expression (self);
}
static syx_varsize
_syx_parser_parse_optimized_block (SyxParser *self, SyxBytecodeSpecial branch_type, syx_bool do_pop)
{
syx_int8 scope_top;
syx_uint16 jump;
syx_bool block_state;
SyxToken token;
syx_int32 i;
syx_bytecode_do_special (self->bytecode, branch_type);
syx_bytecode_gen_code (self->bytecode, 0);
jump = self->bytecode->code_top - 1;
if (do_pop)
syx_bytecode_pop_top (self->bytecode);
block_state = self->_in_block;
self->_in_block = TRUE;
token = syx_lexer_get_last_token (self->lexer);
if (token.type == SYX_TOKEN_BINARY && !strcmp (token.value.string, "["))
{
syx_token_free (token);
syx_lexer_next_token (self->lexer);
/* we need to restore the current scope after the optimized block has been parsed */
scope_top = self->_temporary_scopes[self->_temporary_scopes_top].top;
_syx_parser_parse_temporaries (self);
_syx_parser_parse_body (self);
for (i=scope_top; i < self->_temporary_scopes[self->_temporary_scopes_top].top; i++)
syx_free (self->_temporary_scopes[self->_temporary_scopes_top].stack[i]);
self->_temporary_scopes[self->_temporary_scopes_top].top = scope_top;
token = syx_lexer_next_token (self->lexer);
}
else
{
/* a variable or such has been used, like ifTrue: trueBlock */
_syx_parser_do_binary_continuation (self, _syx_parser_parse_term (self), FALSE);
syx_bytecode_gen_message (self->bytecode, FALSE, 0, "value");
}
self->_in_block = block_state;
self->bytecode->code[jump] = SYX_COMPAT_SWAP_16 (self->bytecode->code_top);
return jump;
}
/*!
Do parse.
\return TRUE if parsing was successful, otherwise FALSE
*/
syx_bool
syx_parser_parse (SyxParser *self, syx_bool skip_message_pattern)
{
SyxToken token;
token = syx_lexer_next_token (self->lexer);
if (token.type == SYX_TOKEN_END)
return TRUE;
self->_temporary_scopes[self->_temporary_scopes_top].top = 0;
self->_argument_scopes[self->_argument_scopes_top].top = 0;
if (!skip_message_pattern)
_syx_parser_parse_message_pattern (self);
if (!self->_in_block)
_syx_parser_parse_primitive (self);
_syx_parser_parse_temporaries (self);
if (self->_in_block)
syx_bytecode_push_constant (self->bytecode, SYX_BYTECODE_CONST_NIL);
_syx_parser_parse_body (self);
syx_bytecode_do_special (self->bytecode, SYX_BYTECODE_SELF_RETURN);
SYX_CODE_BYTECODES(self->method) = syx_byte_array_new_ref (self->bytecode->code_top * sizeof (syx_uint16),
(syx_uint8 *)self->bytecode->code);
SYX_CODE_LITERALS(self->method) = syx_array_new_ref (self->bytecode->literals_top,
self->bytecode->literals);
SYX_CODE_STACK_SIZE(self->method) = syx_small_integer_new (self->bytecode->stack_size + 1);
SYX_CODE_TEXT(self->method) = syx_string_new (self->lexer->text +
syx_find_first_non_whitespace (self->lexer->text));
SYX_CODE_CLASS(self->method) = self->klass;
/* Free arguments and temporaries of this scope */
_syx_parser_free_arguments (self);
_syx_parser_free_temporaries (self);
return TRUE;
}
static syx_varsize
_syx_parser_parse_optimized_block (SyxParser *self, SyxBytecodeSpecial branch_type, syx_bool do_pop)
{
syx_uint16 jump;
syx_bool block_state;
SyxToken token;
syx_bytecode_do_special (self->bytecode, branch_type);
syx_bytecode_gen_code (self->bytecode, 0);
jump = self->bytecode->code_top - 1;
if (do_pop)
syx_bytecode_pop_top (self->bytecode);
block_state = self->_in_block;
self->_in_block = TRUE;
token = syx_lexer_get_last_token (self->lexer);
if (token.type == SYX_TOKEN_BINARY && !strcmp (token.value.string, "["))
{
syx_token_free (token);
syx_lexer_next_token (self->lexer);
_syx_parser_parse_temporaries (self);
_syx_parser_parse_body (self);
self->_temporary_scopes.top--;
token = syx_lexer_next_token (self->lexer);
}
else
{
_syx_parser_do_binary_continuation (self, _syx_parser_parse_term (self), FALSE);
syx_bytecode_gen_message (self->bytecode, FALSE, 0, "value");
}
self->_in_block = block_state;
self->bytecode->code[jump] = SYX_COMPAT_SWAP_16 (self->bytecode->code_top);
return jump;
}
static syx_bool
_syx_parser_do_key_continuation (SyxParser *self, syx_bool super_receiver)
{
SyxToken token;
syx_char selector[256] = {0};
syx_int8 num_args;
syx_bool super_term;
syx_uint16 jump, conditionJump, loopJump;
SyxBytecodeSpecial branchType;
super_receiver = _syx_parser_do_binary_continuation (self, super_receiver, TRUE);
token = syx_lexer_get_last_token (self->lexer);
if (token.type == SYX_TOKEN_NAME_COLON)
{
self->_duplicate_indexes[self->_duplicate_indexes_top - 1] = self->bytecode->code_top;
if (!strcmp (token.value.string, "ifTrue:"))
{
syx_token_free (token);
token = syx_lexer_next_token (self->lexer);
jump = _syx_parser_parse_optimized_block (self, SYX_BYTECODE_BRANCH_IF_TRUE, FALSE);
token = syx_lexer_get_last_token (self->lexer);
if (token.type == SYX_TOKEN_NAME_COLON && !strcmp (token.value.string, "ifFalse:"))
{
syx_token_free (token);
token = syx_lexer_next_token (self->lexer);
/* skip ifFalse: block if condition is true */
syx_bytecode_do_special (self->bytecode, SYX_BYTECODE_BRANCH);
syx_bytecode_gen_code (self->bytecode, 0);
conditionJump = self->bytecode->code_top - 1;
/* jump here if condition is false */
self->bytecode->code[jump] = SYX_COMPAT_SWAP_16 (self->bytecode->code_top);
jump = _syx_parser_parse_optimized_block (self, SYX_BYTECODE_BRANCH, TRUE);
/* We don't need any jump after ifFalse: */
self->bytecode->code[jump] = 0;
/* jump here if condition was true */
self->bytecode->code[conditionJump] = SYX_COMPAT_SWAP_16 (self->bytecode->code_top);
}
return FALSE;
}
else if (!strcmp (token.value.string, "ifFalse:"))
{
syx_token_free (token);
token = syx_lexer_next_token (self->lexer);
jump = _syx_parser_parse_optimized_block (self, SYX_BYTECODE_BRANCH_IF_FALSE, FALSE);
token = syx_lexer_get_last_token (self->lexer);
if (token.type == SYX_TOKEN_NAME_COLON && !strcmp (token.value.string, "ifTrue:"))
{
syx_token_free (token);
token = syx_lexer_next_token (self->lexer);
/* skip ifTrue: block if condition is false */
syx_bytecode_do_special (self->bytecode, SYX_BYTECODE_BRANCH);
syx_bytecode_gen_code (self->bytecode, 0);
conditionJump = self->bytecode->code_top - 1;
/* jump here if condition is true */
self->bytecode->code[jump] = SYX_COMPAT_SWAP_16 (self->bytecode->code_top);
jump = _syx_parser_parse_optimized_block (self, SYX_BYTECODE_BRANCH, TRUE);
/* We don't need any jump after ifFalse: */
self->bytecode->code[jump] = 0;
/* jump here if condition was false */
self->bytecode->code[conditionJump] = SYX_COMPAT_SWAP_16 (self->bytecode->code_top);
}
return FALSE;
}
else if (!strcmp (token.value.string, "whileTrue:") || !strcmp (token.value.string, "whileFalse:"))
{
if (!strcmp (token.value.string, "whileTrue:"))
branchType = SYX_BYTECODE_BRANCH_IF_TRUE;
else
branchType = SYX_BYTECODE_BRANCH_IF_FALSE;
syx_token_free (token);
token = syx_lexer_next_token (self->lexer);
loopJump = self->bytecode->code_top;
syx_bytecode_do_special (self->bytecode, SYX_BYTECODE_DUPLICATE);
syx_bytecode_gen_message (self->bytecode, FALSE, 0, "value");
conditionJump = _syx_parser_parse_optimized_block (self, branchType, FALSE);
syx_bytecode_pop_top (self->bytecode);
syx_bytecode_do_special (self->bytecode, SYX_BYTECODE_BRANCH);
syx_bytecode_gen_code (self->bytecode, loopJump);
self->bytecode->code[conditionJump] = SYX_COMPAT_SWAP_16 (self->bytecode->code_top);
syx_bytecode_pop_top (self->bytecode);
return FALSE;
}
num_args = 0;
while (token.type == SYX_TOKEN_NAME_COLON)
{
strcat (selector, token.value.string);
num_args++;
syx_token_free (token);
syx_lexer_next_token (self->lexer);
super_term = _syx_parser_parse_term (self);
_syx_parser_do_binary_continuation (self, super_term, FALSE);
token = syx_lexer_get_last_token (self->lexer);
}
syx_bytecode_gen_message (self->bytecode, super_receiver, num_args, selector);
return FALSE;
}
return super_receiver;
}