start local static declarations
This commit is contained in:
pommicket
parent
267b52814e
commit
c5e2556d31
2 changed files with 234 additions and 196 deletions
427
05/parse.b
427
05/parse.b
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@ -38,6 +38,24 @@ function structure_is_union
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; parse a translation unit
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function parse_tokens
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argument tokens
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local token
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token = tokens
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:parse_tokens_loop
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if *1token == TOKEN_EOF goto parse_tokens_eof
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parse_toplevel_declaration(&token, global_variables)
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goto parse_tokens_loop
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:parse_tokens_eof
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return
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; also handles static declarations inside functions
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; advances *p_token past semicolon
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; static_vars = where to put static variables
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function parse_toplevel_declaration
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argument p_token
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argument static_vars
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local token
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local ident
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local type
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@ -55,206 +73,221 @@ function parse_tokens
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local is_extern
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local out
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token = tokens
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:parse_tokens_loop
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is_extern = 0
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if *1token == TOKEN_EOF goto parse_tokens_eof
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if *1token == KEYWORD_STATIC goto parse_static_toplevel_decl
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if *1token == KEYWORD_EXTERN goto parse_extern_toplevel_decl
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if *1token == KEYWORD_TYPEDEF goto parse_typedef
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b = token_is_type(token)
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if b != 0 goto parse_toplevel_decl
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token_error(token, .str_bad_statement)
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:str_bad_statement
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string Bad statement.
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byte 0
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:parse_static_toplevel_decl
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token += 16 ; we don't care that this is static
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goto parse_toplevel_decl
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:parse_extern_toplevel_decl
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token = *8p_token
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is_extern = 0
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if *1token == KEYWORD_STATIC goto parse_static_toplevel_decl
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if *1token == KEYWORD_EXTERN goto parse_extern_toplevel_decl
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if *1token == KEYWORD_TYPEDEF goto parse_typedef
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b = token_is_type(token)
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if b != 0 goto parse_toplevel_decl
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token_error(token, .str_bad_decl)
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:str_bad_decl
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string Bad declaration.
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byte 0
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:parse_tld_ret
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*8p_token = token
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return
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:parse_static_toplevel_decl
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token += 16 ; we don't care that this is static
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goto parse_toplevel_decl
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:parse_extern_toplevel_decl
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token += 16
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is_extern = 1
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goto parse_toplevel_decl
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:parse_toplevel_decl
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base_type = token
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base_type_end = type_get_base_end(token)
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token = base_type_end
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:tl_decl_loop
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prefix = token
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prefix_end = type_get_prefix_end(prefix)
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if *1prefix_end != TOKEN_IDENTIFIER goto tl_decl_no_ident
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name = prefix_end + 8
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name = *8name
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suffix = prefix_end + 16
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suffix_end = type_get_suffix_end(prefix)
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type = types_bytes_used
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parse_type_declarators(prefix, prefix_end, suffix, suffix_end)
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parse_base_type(base_type, base_type_end)
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; ensure rwdata_end_addr is aligned to 8 bytes
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; otherwise addresses could be screwed up
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rwdata_end_addr += 7
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rwdata_end_addr >= 3
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rwdata_end_addr <= 3
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token = suffix_end
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if *1token == SYMBOL_LBRACE goto parse_function_definition
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if is_extern != 0 goto parse_tl_decl_cont ; ignore external variable declarations
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; deal with the initializer if there is one
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if *1token == SYMBOL_SEMICOLON goto parse_tld_no_initializer
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if *1token == SYMBOL_COMMA goto parse_tld_no_initializer
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if *1token == SYMBOL_EQ goto parse_tld_initializer
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token_error(token, .str_unrecognized_stuff_after_declaration)
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:str_unrecognized_stuff_after_declaration
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string Declaration should be followed by one of: { , =
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byte 32
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byte 59 ; semicolon
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byte 0
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:parse_tl_decl_cont
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if *1token == SYMBOL_SEMICOLON goto tl_decl_loop_done
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if *1token != SYMBOL_COMMA goto tld_bad_stuff_after_decl
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token += 16
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is_extern = 1
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goto parse_toplevel_decl
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:parse_toplevel_decl
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base_type = token
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base_type_end = type_get_base_end(token)
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token = base_type_end
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:tl_decl_loop
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prefix = token
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prefix_end = type_get_prefix_end(prefix)
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if *1prefix_end != TOKEN_IDENTIFIER goto tl_decl_no_ident
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name = prefix_end + 8
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name = *8name
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suffix = prefix_end + 16
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suffix_end = type_get_suffix_end(prefix)
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type = types_bytes_used
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parse_type_declarators(prefix, prefix_end, suffix, suffix_end)
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parse_base_type(base_type, base_type_end)
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; ensure rwdata_end_addr is aligned to 8 bytes
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; otherwise addresses could be screwed up
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rwdata_end_addr += 7
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rwdata_end_addr >= 3
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rwdata_end_addr <= 3
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token = suffix_end
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if *1token == SYMBOL_LBRACE goto parse_function_definition
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if is_extern != 0 goto parse_tl_decl_cont ; ignore external variable declarations
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; deal with the initializer if there is one
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if *1token == SYMBOL_SEMICOLON goto parse_tld_no_initializer
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if *1token == SYMBOL_COMMA goto parse_tld_no_initializer
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if *1token == SYMBOL_EQ goto parse_tld_initializer
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token_error(token, .str_unrecognized_stuff_after_declaration)
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:str_unrecognized_stuff_after_declaration
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string Declaration should be followed by one of: { , =
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byte 32
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byte 59 ; semicolon
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byte 0
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:parse_tl_decl_cont
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if *1token == SYMBOL_SEMICOLON goto tl_decl_loop_done
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if *1token != SYMBOL_COMMA goto tld_bad_stuff_after_decl
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token += 16
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goto tl_decl_loop
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:tl_decl_loop_done
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token += 16 ; skip semicolon
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goto parse_tokens_loop
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:tl_decl_no_ident
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token_error(prefix_end, .str_tl_decl_no_ident)
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:str_tl_decl_no_ident
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string No identifier in top-level declaration.
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byte 0
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:tld_bad_stuff_after_decl
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token_error(token, .str_tld_bad_stuff_after_decl)
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:str_tld_bad_stuff_after_decl
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string Declarations should be immediately followed by a comma or semicolon.
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byte 0
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:parse_tld_no_initializer
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p = types + type
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if *1p == TYPE_FUNCTION goto parse_tl_decl_cont ; ignore function declarations -- we do two passes anyways
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b = ident_list_lookup(global_variables, name)
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if b != 0 goto global_redefinition
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c = type < 32
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c |= rwdata_end_addr
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ident_list_add(global_variables, name, c)
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; just skip forward by the size of this variable -- it'll automatically be filled with 0s.
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rwdata_end_addr += type_sizeof(type)
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goto parse_tl_decl_cont
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:parse_tld_initializer
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if *1p == TYPE_FUNCTION goto function_initializer
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b = ident_list_lookup(global_variables, name)
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if b != 0 goto global_redefinition
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token += 16 ; skip =
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c = type < 32
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c |= rwdata_end_addr
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ident_list_add(global_variables, name, c)
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parse_constant_initializer(&token, type)
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goto parse_tl_decl_cont
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:global_redefinition
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token_error(token, .str_global_redefinition)
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:str_global_redefinition
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string Redefinition of global variable.
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goto tl_decl_loop
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:tl_decl_loop_done
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token += 16 ; skip semicolon
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goto parse_tld_ret
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:tl_decl_no_ident
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token_error(prefix_end, .str_tl_decl_no_ident)
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:str_tl_decl_no_ident
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string No identifier in top-level declaration.
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byte 0
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:function_initializer
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token_error(token, .str_function_initializer)
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:str_function_initializer
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string Functions should not have initializers.
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:tld_bad_stuff_after_decl
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token_error(token, .str_tld_bad_stuff_after_decl)
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:str_tld_bad_stuff_after_decl
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string Declarations should be immediately followed by a comma or semicolon.
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byte 0
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:parse_function_definition
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p = types + type
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; @TODO: parameters
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; @NOTE: remember to turn array members into pointers
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if *1p != TYPE_FUNCTION goto lbrace_after_declaration
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global function_stmt_data ; initialized in main
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global function_stmt_data_bytes_used
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p = function_stmt_data + function_stmt_data_bytes_used
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out = p
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parse_statement(&token, &out)
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if block_depth != 0 goto stmtdepth_internal_err
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function_stmt_data_bytes_used = out - function_stmt_data
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ident_list_add(function_statements, name, p)
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print_statement(p)
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goto parse_tokens_loop
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:stmtdepth_internal_err
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token_error(token, .str_stmtdepth_internal_err)
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:str_stmtdepth_internal_err
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string Internal compiler error: parse_stmt_depth is not 0 after parsing function body.
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byte 0
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:lbrace_after_declaration
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token_error(token, .str_lbrace_after_declaration)
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:str_lbrace_after_declaration
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string Opening { after declaration of non-function.
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byte 0
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:parse_typedef
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base_type = token + 16
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base_type_end = type_get_base_end(base_type)
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token = base_type_end
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:typedef_loop
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prefix = token
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prefix_end = type_get_prefix_end(prefix)
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if *1prefix_end != TOKEN_IDENTIFIER goto typedef_no_ident
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ident = prefix_end + 8
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ident = *8ident
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suffix = prefix_end + 16
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suffix_end = type_get_suffix_end(prefix)
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;putc('B)
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;putc(':)
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;print_tokens(base_type, base_type_end)
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;putc('P)
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;putc(':)
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;print_tokens(prefix, prefix_end)
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;putc('S)
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;putc(':)
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;print_tokens(suffix, suffix_end)
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type = types_bytes_used
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parse_type_declarators(prefix, prefix_end, suffix, suffix_end)
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parse_base_type(base_type)
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puts(.str_typedef)
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putc(32)
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print_type(type)
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putc(10)
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b = ident_list_lookup(typedefs, ident)
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if b != 0 goto typedef_redefinition
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ident_list_add(typedefs, ident, type)
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token = suffix_end
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if *1token == SYMBOL_SEMICOLON goto typedef_loop_end
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if *1token != SYMBOL_COMMA goto bad_typedef
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token += 16 ; skip comma
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goto typedef_loop
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:typedef_loop_end
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token += 16 ; skip semicolon
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goto parse_tokens_loop
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:typedef_no_ident
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token_error(token, .str_typedef_no_ident)
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:str_typedef_no_ident
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string No identifier in typedef declaration.
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:parse_tld_no_initializer
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p = types + type
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if *1p == TYPE_FUNCTION goto parse_tl_decl_cont ; ignore function declarations -- we do two passes anyways
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b = ident_list_lookup(static_vars, name)
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if b != 0 goto global_redefinition
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c = type < 32
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c |= rwdata_end_addr
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ident_list_add(static_vars, name, c)
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; just skip forward by the size of this variable -- it'll automatically be filled with 0s.
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rwdata_end_addr += type_sizeof(type)
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goto parse_tl_decl_cont
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:parse_tld_initializer
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p = types + type
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if *1p == TYPE_FUNCTION goto function_initializer
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b = ident_list_lookup(static_vars, name)
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if b != 0 goto global_redefinition
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token += 16 ; skip =
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c = type < 32
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c |= rwdata_end_addr
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ident_list_add(static_vars, name, c)
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parse_constant_initializer(&token, type)
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goto parse_tl_decl_cont
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:global_redefinition
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token_error(token, .str_global_redefinition)
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:str_global_redefinition
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string Redefinition of global variable.
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byte 0
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:function_initializer
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token_error(token, .str_function_initializer)
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:str_function_initializer
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string Functions should not have initializers.
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byte 0
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:parse_function_definition
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if block_depth != 0 goto nested_function
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p = types + type
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; @TODO: parameters
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; @NOTE: remember to turn array members into pointers
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if *1p != TYPE_FUNCTION goto lbrace_after_declaration
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global function_stmt_data ; initialized in main
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global function_stmt_data_bytes_used
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p = function_stmt_data + function_stmt_data_bytes_used
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out = p
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parse_statement(&token, &out)
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if block_depth != 0 goto stmtdepth_internal_err
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function_stmt_data_bytes_used = out - function_stmt_data
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ident_list_add(function_statements, name, p)
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print_statement(p)
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goto parse_tld_ret
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:stmtdepth_internal_err
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token_error(token, .str_stmtdepth_internal_err)
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:str_stmtdepth_internal_err
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string Internal compiler error: parse_stmt_depth is not 0 after parsing function body.
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byte 0
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:bad_typedef
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token_error(token, .str_bad_typedef)
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:str_bad_typedef
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string Bad typedef.
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:lbrace_after_declaration
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token_error(token, .str_lbrace_after_declaration)
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:str_lbrace_after_declaration
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string Opening { after declaration of non-function.
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byte 0
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:typedef_redefinition
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token_error(token, .str_typedef_redefinition)
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:str_typedef_redefinition
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string typedef redefinition.
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:nested_function
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token_error(token, .str_nested_function)
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:str_nested_function
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string Nested function.
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byte 0
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:parse_tokens_eof
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return
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:parse_typedef
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if block_depth > 0 goto local_typedef
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base_type = token + 16
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base_type_end = type_get_base_end(base_type)
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token = base_type_end
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:typedef_loop
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prefix = token
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prefix_end = type_get_prefix_end(prefix)
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if *1prefix_end != TOKEN_IDENTIFIER goto typedef_no_ident
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ident = prefix_end + 8
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ident = *8ident
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suffix = prefix_end + 16
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suffix_end = type_get_suffix_end(prefix)
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;putc('B)
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;putc(':)
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;print_tokens(base_type, base_type_end)
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;putc('P)
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;putc(':)
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;print_tokens(prefix, prefix_end)
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;putc('S)
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;putc(':)
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;print_tokens(suffix, suffix_end)
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type = types_bytes_used
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parse_type_declarators(prefix, prefix_end, suffix, suffix_end)
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parse_base_type(base_type)
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puts(.str_typedef)
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putc(32)
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print_type(type)
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putc(10)
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b = ident_list_lookup(typedefs, ident)
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if b != 0 goto typedef_redefinition
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ident_list_add(typedefs, ident, type)
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token = suffix_end
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if *1token == SYMBOL_SEMICOLON goto typedef_loop_end
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if *1token != SYMBOL_COMMA goto bad_typedef
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token += 16 ; skip comma
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goto typedef_loop
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:typedef_loop_end
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token += 16 ; skip semicolon
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goto parse_tld_ret
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:local_typedef
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; @NONSTANDARD
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; we could add an extra "typedefs" argument to this function to fix this.
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token_error(token, .str_local_typedef)
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:str_local_typedef
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string typedefs inside functions are not supported.
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byte 0
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:typedef_no_ident
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token_error(token, .str_typedef_no_ident)
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:str_typedef_no_ident
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string No identifier in typedef declaration.
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byte 0
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:bad_typedef
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token_error(token, .str_bad_typedef)
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:str_bad_typedef
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string Bad typedef.
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byte 0
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:typedef_redefinition
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token_error(token, .str_typedef_redefinition)
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:str_typedef_redefinition
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string typedef redefinition.
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byte 0
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; write type, file, and line info for statement
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function write_statement_header
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@ -281,7 +314,6 @@ function parse_statement
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local c
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local n
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out = *8p_out
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token = *8p_token
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@ -321,7 +353,10 @@ function parse_statement
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*8p_out = out
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return
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:stmt_static_declaration
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byte 0xcc ; @TODO
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p = block_static_variables
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p += block_depth < 3
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parse_toplevel_declaration(&token, *8p)
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goto parse_statement_ret
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:stmt_break
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write_statement_header(out, STATEMENT_BREAK, token)
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token += 16
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