more work, now it's broken
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pommicket
parent
618be81b5c
commit
73b6a68559
4 changed files with 97 additions and 41 deletions
38
05/idents.b
38
05/idents.b
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@ -7,6 +7,44 @@ function ident_list_create
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*1list = 255
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return list
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function ident_list_clear
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argument list
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*1list = 255
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return
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function ident_list_free
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argument list
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free(list)
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return
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function ident_list_len
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argument list
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local len
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len = 0
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:ilist_len_loop
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if *1list == 255 goto ilist_len_ret
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list = memchr(list, 0)
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list += 9 ; skip null byte and value
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len += 1
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goto ilist_len_loop
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:ilist_len_ret
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return len
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function ident_list_value_at_index
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argument list
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argument idx
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:ilist_vai_loop
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if *1list == 255 goto return_0
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list = memchr(list, 0)
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list += 1
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if idx <= 0 goto ilist_vai_ret
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list += 8
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idx -= 1
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goto ilist_vai_loop
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:ilist_vai_ret
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return *8list
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function ident_list_add
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argument list
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argument ident
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@ -38,6 +38,8 @@ global struct_names
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; for unions, offset will always be 0.
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global structures
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global structures_bytes_used
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; ident list of type IDs
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global parse_type_result
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#include util.b
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#include idents.b
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@ -3,4 +3,4 @@
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long double d;
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} (*x)(void);
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*/
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typedef int Foo(struct Bar *);
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typedef int Foo;
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86
05/parse.b
86
05/parse.b
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@ -29,6 +29,7 @@ function parse_tokens
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local token
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local ident
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local type
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local p
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token = tokens
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:parse_tokens_loop
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@ -39,16 +40,27 @@ function parse_tokens
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:parse_typedef
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token += 16
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type = parse_type(&token, &ident)
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if ident == 0 goto typedef_no_ident
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type = parse_type(&token)
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if type != 0 goto typedef_no_ident
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if *1token != SYMBOL_SEMICOLON goto typedef_no_semicolon
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p = parse_type_result
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:typedef_loop
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if *1p == 255 goto typedef_loop_end
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ident = p
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p = memchr(p, 0)
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p += 1
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type = *8p
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p += 8
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puts(ident)
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putc(':)
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putc(32)
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print_type(type)
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putc(10)
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ident_list_add(typedefs, ident, type)
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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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@ -127,35 +139,17 @@ function token_skip_to_matching_rsquare
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string Unmatched [
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byte 0
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; ident list of type IDs
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global parse_types_result
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; parse things like `int x` or `int f(void, int, char *)`
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; advances *p_token
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; returns type ID, or 0, in which case you should look at parse_type_idents
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; returns type ID, or 0, in which case you should look at parse_type_result
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function parse_type
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argument p_token
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argument p_ident
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local type
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local p
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local n
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type = types_bytes_used
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p = types + type
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n = parse_type_to(p_token, p_ident, p)
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types_bytes_used = n - types
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return type
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; like parse_type, but outputs to out.
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; returns new position of out, after type gets put there
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function parse_type_to
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; split types into base (B), prefix (P) and suffix (S)
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; struct Thing (*things[5])(void), *something_else[3];
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; BBBBBBBBBBBB PP SSSSSSSSSS P SSS
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; Here, we call `struct Thing` the "base type".
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argument p_token
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argument p_ident
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argument out ; pointer to type
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local typeid
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local token
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local c
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local p
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@ -166,10 +160,11 @@ function parse_type_to
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local prefix_end
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local suffix
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local suffix_end
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local ident
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token = *8p_token
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prefix = token
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*8p_ident = 0
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ident_list_clear(parse_type_result)
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c = *1token
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if c == KEYWORD_STRUCT goto skip_struct_union_enum
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@ -185,15 +180,17 @@ function parse_type_to
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if c == KEYWORD_INT goto skip_base_type_loop_cont ;e.g. unsigned int x;
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if c == KEYWORD_LONG goto skip_base_type_loop_cont ;e.g. unsigned long x;
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if c == KEYWORD_DOUBLE goto skip_base_type_loop_cont ;e.g. long double x;
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goto find_prefix_end
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goto skip_base_type_loop_end
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:skip_base_type_loop_cont
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token += 16
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goto skip_base_type_loop
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:find_prefix_end
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; find end of prefix
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:skip_base_type_loop_end
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; find end of 1st prefix
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base_type_end = token
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ident = 0
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:find_prefix_end_loop
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c = *1token
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if c == TOKEN_IDENTIFIER goto found_prefix_end
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@ -218,7 +215,7 @@ function parse_type_to
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if *1token != TOKEN_IDENTIFIER goto parse_type_no_ident
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token += 8
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*8p_ident = *8token
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ident = *8token
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token += 8
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:parse_type_no_ident
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@ -237,7 +234,7 @@ function parse_type_to
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if c == SYMBOL_RPAREN goto suffix_end_decdepth
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if c == SYMBOL_TIMES goto suffix_end_cont
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if depth == 0 goto suffix_end_found
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if c == TOKEN_EOF goto to_bad_type
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if c == TOKEN_EOF goto pt_bad_type
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goto suffix_end_cont
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:suffix_end_incdepth
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@ -274,24 +271,31 @@ function parse_type_to
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TYPEDEBUG putc(32)
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TYPEDEBUG print_tokens(suffix, suffix_end)
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out = parse_type_given_base_prefix_suffix(*8p_token, prefix, prefix_end, suffix, suffix_end, out)
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typeid = types_bytes_used
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p = types + typeid
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p = parse_type_given_base_prefix_suffix(*8p_token, prefix, prefix_end, suffix, suffix_end, p)
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if ident == 0 goto type_no_ident
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ident_list_add(parse_type_result, typeid)
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typeid = 0
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:type_no_ident
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*8p_token = suffix_end
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return out
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types_bytes_used = p - types
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return typeid
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:skip_struct_union_enum
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token += 16
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if *1token != TOKEN_IDENTIFIER goto skip_sue_no_name
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token += 16 ; struct *blah*
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:skip_sue_no_name
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if *1token != SYMBOL_LBRACE goto find_prefix_end ; e.g. struct Something x[5];
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if *1token != SYMBOL_LBRACE goto skip_base_type_loop_end ; e.g. struct Something x[5];
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; okay we have something like
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; struct {
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; int x, y;
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; } test;
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token_skip_to_matching_rbrace(&token)
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token += 16
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goto find_prefix_end
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:to_bad_type
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goto skip_base_type_loop_end
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:pt_bad_type
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token_error(*8p_token, .str_bad_type)
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:str_bad_type
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string Bad type.
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@ -361,12 +365,22 @@ function parse_type_given_base_prefix_suffix
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string Very large or negative array size.
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byte 0
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:parse_function_type
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local prev_parse_type_result
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prev_parse_type_result = parse_type_result
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parse_type_result = ident_list_create(16000)
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p = suffix + 16
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*1out = TYPE_FUNCTION
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out += 1
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:function_type_loop
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if *1p == SYMBOL_RPAREN goto function_type_loop_end ; only needed for 1st iteration
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out = parse_type_to(&p, &c, out)
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n = parse_type(&p)
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if n != 0 goto fparam_have_type
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c = ident_list_len(parse_type_result)
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if c != 1 goto bps_bad_type
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n = ident_list_value_at_index(parse_type_result, 0)
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:fparam_have_type
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n += type_length(n)
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out = types + n
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if *1p == SYMBOL_RPAREN goto function_type_loop_end
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if *1p != SYMBOL_COMMA goto bps_bad_type
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p += 16
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@ -375,6 +389,8 @@ function parse_type_given_base_prefix_suffix
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*1out = 0
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out += 1
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suffix = p + 16
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ident_list_free(parse_type_result)
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parse_type_result = prev_parse_type_result
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goto parse_type_loop
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:parse_type_remove_parentheses
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if *1p != SYMBOL_LPAREN goto bps_bad_type
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