1189 lines
40 KiB
C
1189 lines
40 KiB
C
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// TOP
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#ifndef FCPP_NEW_LEXER_INC
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#define FCPP_NEW_LEXER_INC
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#include "../4cpp_lexer_types.h"
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#include "4cpp_lexer_fsms.h"
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#include "4cpp_lexer_tables.c"
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#define lexer_link static
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// TODO(allen): revisit this keyword data declaration system
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struct String_List{
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String_And_Flag *data;
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int count;
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};
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struct Sub_Match_List_Result{
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int index;
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fcpp_i32 new_pos;
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};
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#define lexer_string_list(x) {x, (sizeof(x)/sizeof(*x))}
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static String_And_Flag bool_lit_strings[] = {
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{"true"}, {"false"}
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};
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static String_List bool_lits = lexer_string_list(bool_lit_strings);
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static String_And_Flag keyword_strings[] = {
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{"and", CPP_TOKEN_AND},
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{"and_eq", CPP_TOKEN_ANDEQ},
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{"bitand", CPP_TOKEN_BIT_AND},
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{"bitor", CPP_TOKEN_BIT_OR},
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{"or", CPP_TOKEN_OR},
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{"or_eq", CPP_TOKEN_OREQ},
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{"sizeof", CPP_TOKEN_SIZEOF},
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{"alignof", CPP_TOKEN_ALIGNOF},
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{"decltype", CPP_TOKEN_DECLTYPE},
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{"throw", CPP_TOKEN_THROW},
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{"new", CPP_TOKEN_NEW},
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{"delete", CPP_TOKEN_DELETE},
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{"xor", CPP_TOKEN_BIT_XOR},
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{"xor_eq", CPP_TOKEN_XOREQ},
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{"not", CPP_TOKEN_NOT},
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{"not_eq", CPP_TOKEN_NOTEQ},
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{"typeid", CPP_TOKEN_TYPEID},
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{"compl", CPP_TOKEN_BIT_NOT},
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{"void", CPP_TOKEN_KEY_TYPE},
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{"bool", CPP_TOKEN_KEY_TYPE},
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{"char", CPP_TOKEN_KEY_TYPE},
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{"int", CPP_TOKEN_KEY_TYPE},
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{"float", CPP_TOKEN_KEY_TYPE},
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{"double", CPP_TOKEN_KEY_TYPE},
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{"long", CPP_TOKEN_KEY_MODIFIER},
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{"short", CPP_TOKEN_KEY_MODIFIER},
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{"unsigned", CPP_TOKEN_KEY_MODIFIER},
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{"const", CPP_TOKEN_KEY_QUALIFIER},
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{"volatile", CPP_TOKEN_KEY_QUALIFIER},
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{"asm", CPP_TOKEN_KEY_CONTROL_FLOW},
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{"break", CPP_TOKEN_KEY_CONTROL_FLOW},
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{"case", CPP_TOKEN_KEY_CONTROL_FLOW},
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{"catch", CPP_TOKEN_KEY_CONTROL_FLOW},
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{"continue", CPP_TOKEN_KEY_CONTROL_FLOW},
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{"default", CPP_TOKEN_KEY_CONTROL_FLOW},
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{"do", CPP_TOKEN_KEY_CONTROL_FLOW},
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{"else", CPP_TOKEN_KEY_CONTROL_FLOW},
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{"for", CPP_TOKEN_KEY_CONTROL_FLOW},
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{"goto", CPP_TOKEN_KEY_CONTROL_FLOW},
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{"if", CPP_TOKEN_KEY_CONTROL_FLOW},
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{"return", CPP_TOKEN_KEY_CONTROL_FLOW},
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{"switch", CPP_TOKEN_KEY_CONTROL_FLOW},
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{"try", CPP_TOKEN_KEY_CONTROL_FLOW},
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{"while", CPP_TOKEN_KEY_CONTROL_FLOW},
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{"static_assert", CPP_TOKEN_KEY_CONTROL_FLOW},
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{"const_cast", CPP_TOKEN_KEY_CAST},
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{"dynamic_cast", CPP_TOKEN_KEY_CAST},
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{"reinterpret_cast", CPP_TOKEN_KEY_CAST},
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{"static_cast", CPP_TOKEN_KEY_CAST},
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{"class", CPP_TOKEN_KEY_TYPE_DECLARATION},
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{"enum", CPP_TOKEN_KEY_TYPE_DECLARATION},
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{"struct", CPP_TOKEN_KEY_TYPE_DECLARATION},
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{"typedef", CPP_TOKEN_KEY_TYPE_DECLARATION},
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{"union", CPP_TOKEN_KEY_TYPE_DECLARATION},
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{"template", CPP_TOKEN_KEY_TYPE_DECLARATION},
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{"typename", CPP_TOKEN_KEY_TYPE_DECLARATION},
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{"friend", CPP_TOKEN_KEY_ACCESS},
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{"namespace", CPP_TOKEN_KEY_ACCESS},
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{"private", CPP_TOKEN_KEY_ACCESS},
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{"protected", CPP_TOKEN_KEY_ACCESS},
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{"public", CPP_TOKEN_KEY_ACCESS},
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{"using", CPP_TOKEN_KEY_ACCESS},
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{"extern", CPP_TOKEN_KEY_LINKAGE},
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{"export", CPP_TOKEN_KEY_LINKAGE},
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{"inline", CPP_TOKEN_KEY_LINKAGE},
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{"static", CPP_TOKEN_KEY_LINKAGE},
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{"virtual", CPP_TOKEN_KEY_LINKAGE},
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{"alignas", CPP_TOKEN_KEY_OTHER},
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{"explicit", CPP_TOKEN_KEY_OTHER},
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{"noexcept", CPP_TOKEN_KEY_OTHER},
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{"nullptr", CPP_TOKEN_KEY_OTHER},
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{"operator", CPP_TOKEN_KEY_OTHER},
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{"register", CPP_TOKEN_KEY_OTHER},
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{"this", CPP_TOKEN_KEY_OTHER},
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{"thread_local", CPP_TOKEN_KEY_OTHER},
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};
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static String_List keywords = lexer_string_list(keyword_strings);
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lexer_link Sub_Match_List_Result
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sub_match_list(char *chunk, int size, int pos, String_List list, int sub_size){
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Sub_Match_List_Result result;
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String str_main;
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char *str_check;
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int i,l;
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result.index = -1;
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result.new_pos = pos;
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str_main = make_string(chunk + pos, size - pos);
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if (sub_size > 0){
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str_main = substr(str_main, 0, sub_size);
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for (i = 0; i < list.count; ++i){
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str_check = list.data[i].str;
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if (match(str_main, str_check)){
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result.index = i;
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result.new_pos = pos + sub_size;
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break;
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}
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}
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}
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else{
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for (i = 0; i < list.count; ++i){
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str_check = list.data[i].str;
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if (match_part(str_main, str_check, &l)){
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result.index = i;
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result.new_pos = pos + l;
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break;
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}
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}
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}
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return result;
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}
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lexer_link Cpp_Get_Token_Result
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cpp_get_token(Cpp_Token_Stack *token_stack, int pos){
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Cpp_Get_Token_Result result = {};
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Cpp_Token *token_array = token_stack->tokens;
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Cpp_Token *token = 0;
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int first = 0;
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int count = token_stack->count;
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int last = count;
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int this_start = 0, next_start = 0;
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if (count > 0){
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for (;;){
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result.token_index = (first + last)/2;
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token = token_array + result.token_index;
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this_start = token->start;
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if (result.token_index + 1 < count){
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next_start = (token + 1)->start;
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}
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else{
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next_start = this_start + token->size;
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}
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if (this_start <= pos && pos < next_start){
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break;
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}
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else if (pos < this_start){
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last = result.token_index;
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}
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else{
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first = result.token_index + 1;
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}
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if (first == last){
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result.token_index = first;
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break;
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}
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}
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if (result.token_index == count){
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--result.token_index;
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result.in_whitespace = 1;
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}
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else{
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if (token->start + token->size <= pos){
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result.in_whitespace = 1;
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}
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}
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}
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else{
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result.token_index = -1;
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result.in_whitespace = 1;
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}
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return(result);
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}
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lexer_link void
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cpp_shift_token_starts(Cpp_Token_Stack *stack, int from_token_i, int shift_amount){
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Cpp_Token *token = stack->tokens + from_token_i;
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int count = stack->count, i;
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for (i = from_token_i; i < count; ++i, ++token){
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token->start += shift_amount;
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}
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}
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enum Pos_Update_Rule{
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PUR_none,
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PUR_back_one,
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PUR_unget_whitespace,
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};
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lexer_link Lex_PP_State
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cpp_pp_directive_to_state(Cpp_Token_Type type){
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Lex_PP_State result = LSPP_default;
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switch (type){
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case CPP_PP_INCLUDE:
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case CPP_PP_IMPORT:
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case CPP_PP_USING:
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result = LSPP_include;
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break;
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case CPP_PP_DEFINE:
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result = LSPP_macro_identifier;
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break;
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case CPP_PP_UNDEF:
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case CPP_PP_IFDEF:
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case CPP_PP_IFNDEF:
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result = LSPP_identifier;
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break;
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case CPP_PP_IF:
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case CPP_PP_ELIF:
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result = LSPP_body_if;
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break;
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case CPP_PP_PRAGMA:
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result = LSPP_body;
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break;
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case CPP_PP_LINE:
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result = LSPP_number;
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break;
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case CPP_PP_ERROR:
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result = LSPP_error;
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break;
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case CPP_PP_UNKNOWN:
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case CPP_PP_ELSE:
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case CPP_PP_ENDIF:
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result = LSPP_junk;
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break;
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}
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return(result);
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}
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lexer_link Cpp_Token_Merge
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cpp_attempt_token_merge(Cpp_Token prev_token, Cpp_Token next_token){
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Cpp_Token_Merge result = {(Cpp_Token_Type)0};
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if (next_token.type == CPP_TOKEN_COMMENT && prev_token.type == CPP_TOKEN_COMMENT &&
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next_token.flags == prev_token.flags && next_token.state_flags == prev_token.state_flags){
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result.did_merge = 1;
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prev_token.size = next_token.start + next_token.size - prev_token.start;
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result.new_token = prev_token;
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}
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else if (next_token.type == CPP_TOKEN_JUNK && prev_token.type == CPP_TOKEN_JUNK &&
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next_token.flags == prev_token.flags && next_token.state_flags == prev_token.state_flags){
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result.did_merge = 1;
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prev_token.size = next_token.start + next_token.size - prev_token.start;
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result.new_token = prev_token;
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}
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return result;
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}
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lexer_link int
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cpp_place_token_nonalloc(Cpp_Token *out_tokens, int token_i, Cpp_Token token){
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Cpp_Token_Merge merge = {(Cpp_Token_Type)0};
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Cpp_Token prev_token = {(Cpp_Token_Type)0};
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if (token_i > 0){
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prev_token = out_tokens[token_i - 1];
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merge = cpp_attempt_token_merge(prev_token, token);
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if (merge.did_merge){
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out_tokens[token_i - 1] = merge.new_token;
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}
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}
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if (!merge.did_merge){
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out_tokens[token_i++] = token;
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}
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return(token_i);
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}
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lexer_link bool
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cpp_push_token_nonalloc(Cpp_Token_Stack *out_tokens, Cpp_Token token){
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bool result = 0;
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if (out_tokens->count == out_tokens->max_count){
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out_tokens->count =
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cpp_place_token_nonalloc(out_tokens->tokens, out_tokens->count, token);
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result = 1;
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}
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return(result);
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}
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struct Lex_Data{
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char *tb;
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int tb_pos;
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int token_start;
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int pos;
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int pos_overide;
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int chunk_pos;
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Lex_FSM fsm;
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Whitespace_FSM wfsm;
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unsigned char pp_state;
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unsigned char completed;
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Cpp_Token token;
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int __pc__;
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};
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inline Lex_Data
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lex_data_init(char *tb){
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Lex_Data data = {0};
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data.tb = tb;
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return(data);
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}
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#define DrCase(PC) case PC: goto resumespot_##PC
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#define DrYield(PC, n) {\
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token_stack_out->count = token_i;\
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*S_ptr = S; S_ptr->__pc__ = PC; return(n); resumespot_##PC:; }
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#define DrReturn(n) {\
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token_stack_out->count = token_i;\
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*S_ptr = S; S_ptr->__pc__ = -1; return(n); }
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enum Lex_Result{
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LexFinished,
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LexNeedChunk,
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LexNeedTokenMemory,
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LexHitTokenLimit
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};
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lexer_link int
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cpp_lex_nonalloc(Lex_Data *S_ptr,
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char *chunk, int size,
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Cpp_Token_Stack *token_stack_out){
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Lex_Data S = *S_ptr;
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Cpp_Token *out_tokens = token_stack_out->tokens;
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int token_i = token_stack_out->count;
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int max_token_i = token_stack_out->max_count;
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Pos_Update_Rule pos_update_rule = PUR_none;
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char c = 0;
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int end_pos = size + S.chunk_pos;
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chunk -= S.chunk_pos;
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switch (S.__pc__){
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DrCase(1);
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DrCase(2);
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DrCase(3);
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DrCase(4);
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DrCase(5);
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DrCase(6);
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}
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for (;;){
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S.wfsm.white_done = 0;
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S.wfsm.pp_state = S.pp_state;
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for(;;){
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for (; S.wfsm.pp_state < LSPP_count && S.pos < end_pos;){
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c = chunk[S.pos++];
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int i = S.wfsm.pp_state + whitespace_fsm_eq_classes[c];
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S.wfsm.pp_state = whitespace_fsm_table[i];
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}
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S.wfsm.white_done = (S.wfsm.pp_state >= LSPP_count);
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if (S.wfsm.white_done == 0){
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S.chunk_pos += size;
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DrYield(4, LexNeedChunk);
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}
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else break;
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}
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--S.pos;
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S.pp_state = S.wfsm.pp_state;
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if (S.pp_state >= LSPP_count){
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S.pp_state -= LSPP_count;
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}
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S.token_start = S.pos;
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S.tb_pos = 0;
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S.fsm = zero_lex_fsm();
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for(;;){
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{
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unsigned short *eq_classes = get_eq_classes[S.pp_state];
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unsigned char *fsm_table = get_table[S.pp_state];
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for (; S.fsm.state < LS_count && S.pos < end_pos;){
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c = chunk[S.pos++];
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S.tb[S.tb_pos++] = c;
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int i = S.fsm.state + eq_classes[c];
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S.fsm.state = fsm_table[i];
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S.fsm.multi_line |= multiline_state_table[S.fsm.state];
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}
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S.fsm.emit_token = (S.fsm.state >= LS_count);
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}
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if (S.fsm.emit_token == 0){
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S.chunk_pos += size;
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DrYield(3, LexNeedChunk);
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}
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else break;
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}
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Assert(S.fsm.emit_token == 1);
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if (c != 0){
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if (S.fsm.state >= LS_count) S.fsm.state -= LS_count;
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pos_update_rule = PUR_none;
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if (S.pp_state == LSPP_include){
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switch (S.fsm.state){
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case LSINC_default:break;
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case LSINC_quotes:
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case LSINC_pointy:
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S.token.type = CPP_TOKEN_INCLUDE_FILE;
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S.token.flags = 0;
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break;
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case LSINC_junk:
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S.token.type = CPP_TOKEN_JUNK;
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S.token.flags = 0;
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break;
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}
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}
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else{
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switch (S.fsm.state){
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case LS_default:
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switch (c){
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#define OperCase(op,t) case op: S.token.type = t; break;
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OperCase('{', CPP_TOKEN_BRACE_OPEN);
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OperCase('}', CPP_TOKEN_BRACE_CLOSE);
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OperCase('[', CPP_TOKEN_BRACKET_OPEN);
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OperCase(']', CPP_TOKEN_BRACKET_CLOSE);
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OperCase('(', CPP_TOKEN_PARENTHESE_OPEN);
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OperCase(')', CPP_TOKEN_PARENTHESE_CLOSE);
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OperCase('~', CPP_TOKEN_TILDE);
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OperCase(',', CPP_TOKEN_COMMA);
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OperCase(';', CPP_TOKEN_SEMICOLON);
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OperCase('?', CPP_TOKEN_TERNARY_QMARK);
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OperCase('@', CPP_TOKEN_JUNK);
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OperCase('$', CPP_TOKEN_JUNK);
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#undef OperCase
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case '\\':
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if (S.pp_state == LSPP_default){
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S.token.type = CPP_TOKEN_JUNK;
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}
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else{
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S.pos_overide = S.pos;
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S.wfsm.white_done = 0;
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for (;;){
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for (; S.wfsm.white_done == 0 && S.pos < end_pos;){
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c = chunk[S.pos++];
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if (!(c == ' ' || c == '\t' || c == '\r' || c == '\v' || c == '\f')) S.wfsm.white_done = 1;
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}
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if (S.wfsm.white_done == 0){
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S.chunk_pos += size;
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DrYield(1, LexNeedChunk);
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}
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else break;
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}
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if (c == '\n'){
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S.fsm.emit_token = 0;
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S.pos_overide = 0;
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}
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else{
|
|
S.token.type = CPP_TOKEN_JUNK;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
if (c != '@' && c != '$' && c != '\\'){
|
|
S.token.flags = CPP_TFLAG_IS_OPERATOR;
|
|
}
|
|
break;
|
|
|
|
case LS_identifier:
|
|
{
|
|
--S.pos;
|
|
|
|
int word_size = S.pos - S.token_start;
|
|
|
|
if (S.pp_state == LSPP_body_if){
|
|
if (match(make_string(S.tb, word_size), make_lit_string("defined"))){
|
|
S.token.type = CPP_TOKEN_DEFINED;
|
|
S.token.flags = CPP_TFLAG_IS_OPERATOR | CPP_TFLAG_IS_KEYWORD;
|
|
break;
|
|
}
|
|
}
|
|
|
|
Sub_Match_List_Result sub_match;
|
|
sub_match = sub_match_list(S.tb, S.tb_pos, 0, bool_lits, word_size);
|
|
|
|
if (sub_match.index != -1){
|
|
S.token.type = CPP_TOKEN_BOOLEAN_CONSTANT;
|
|
S.token.flags = CPP_TFLAG_IS_KEYWORD;
|
|
}
|
|
else{
|
|
sub_match = sub_match_list(S.tb, S.tb_pos, 0, keywords, word_size);
|
|
|
|
if (sub_match.index != -1){
|
|
String_And_Flag data = keywords.data[sub_match.index];
|
|
S.token.type = (Cpp_Token_Type)data.flags;
|
|
S.token.flags = CPP_TFLAG_IS_KEYWORD;
|
|
}
|
|
else{
|
|
S.token.type = CPP_TOKEN_IDENTIFIER;
|
|
S.token.flags = 0;
|
|
}
|
|
}
|
|
}break;
|
|
|
|
case LS_pound:
|
|
S.token.flags = 0;
|
|
switch (c){
|
|
case '#': S.token.type = CPP_PP_CONCAT; break;
|
|
default:
|
|
S.token.type = CPP_PP_STRINGIFY;
|
|
pos_update_rule = PUR_back_one;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case LS_pp:
|
|
{
|
|
S.fsm.directive_state = LSDIR_default;
|
|
S.fsm.emit_token = 0;
|
|
for (;;){
|
|
for (; S.fsm.directive_state < LSDIR_count && S.pos < end_pos;){
|
|
c = chunk[S.pos++];
|
|
S.fsm.directive_state = pp_directive_table[S.fsm.directive_state + pp_directive_eq_classes[c]];
|
|
}
|
|
S.fsm.emit_token = (S.fsm.int_state >= LSDIR_count);
|
|
|
|
if (S.fsm.emit_token == 0){
|
|
S.chunk_pos += size;
|
|
DrYield(6, LexNeedChunk);
|
|
}
|
|
else break;
|
|
}
|
|
--S.pos;
|
|
|
|
Cpp_Token_Type type = (Cpp_Token_Type)(S.fsm.directive_state - pp_directive_terminal_base);
|
|
S.token.type = type;
|
|
if (type == CPP_TOKEN_JUNK){
|
|
S.token.flags = 0;
|
|
}
|
|
else{
|
|
S.token.flags = CPP_TFLAG_PP_DIRECTIVE;
|
|
S.pp_state = (unsigned char)cpp_pp_directive_to_state(S.token.type);
|
|
}
|
|
}break;
|
|
|
|
case LS_number:
|
|
case LS_number0:
|
|
case LS_hex:
|
|
S.fsm.int_state = LSINT_default;
|
|
S.fsm.emit_token = 0;
|
|
--S.pos;
|
|
for (;;){
|
|
for (; S.fsm.int_state < LSINT_count && S.pos < end_pos;){
|
|
c = chunk[S.pos++];
|
|
S.fsm.int_state = int_fsm_table[S.fsm.int_state + int_fsm_eq_classes[c]];
|
|
}
|
|
S.fsm.emit_token = (S.fsm.int_state >= LSINT_count);
|
|
|
|
if (S.fsm.emit_token == 0){
|
|
S.chunk_pos += size;
|
|
DrYield(5, LexNeedChunk);
|
|
}
|
|
else break;
|
|
}
|
|
--S.pos;
|
|
|
|
S.token.type = CPP_TOKEN_INTEGER_CONSTANT;
|
|
S.token.flags = 0;
|
|
break;
|
|
|
|
case LS_float:
|
|
case LS_crazy_float0:
|
|
case LS_crazy_float1:
|
|
S.token.type = CPP_TOKEN_FLOATING_CONSTANT;
|
|
S.token.flags = 0;
|
|
switch (c){
|
|
case 'f': case 'F':
|
|
case 'l': case 'L':break;
|
|
default:
|
|
pos_update_rule = PUR_back_one;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case LS_char:
|
|
case LS_char_slashed:
|
|
S.token.type = CPP_TOKEN_CHARACTER_CONSTANT;
|
|
S.token.flags = 0;
|
|
break;
|
|
|
|
case LS_char_multiline:
|
|
S.token.type = CPP_TOKEN_CHARACTER_CONSTANT;
|
|
S.token.flags = CPP_TFLAG_MULTILINE;
|
|
break;
|
|
|
|
case LS_string:
|
|
case LS_string_slashed:
|
|
S.token.type = CPP_TOKEN_STRING_CONSTANT;
|
|
S.token.flags = 0;
|
|
break;
|
|
|
|
case LS_string_multiline:
|
|
S.token.type = CPP_TOKEN_STRING_CONSTANT;
|
|
S.token.flags = CPP_TFLAG_MULTILINE;
|
|
break;
|
|
|
|
case LS_comment_pre:
|
|
S.token.flags = CPP_TFLAG_IS_OPERATOR;
|
|
switch (c){
|
|
case '=': S.token.type = CPP_TOKEN_DIVEQ; break;
|
|
default:
|
|
S.token.type = CPP_TOKEN_DIV;
|
|
pos_update_rule = PUR_back_one;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case LS_comment:
|
|
case LS_comment_slashed:
|
|
case LS_comment_block:
|
|
case LS_comment_block_ending:
|
|
S.token.type = CPP_TOKEN_COMMENT;
|
|
S.token.flags = 0;
|
|
pos_update_rule = PUR_unget_whitespace;
|
|
break;
|
|
|
|
case LS_error_message:
|
|
S.token.type = CPP_TOKEN_ERROR_MESSAGE;
|
|
S.token.flags = 0;
|
|
pos_update_rule = PUR_unget_whitespace;
|
|
break;
|
|
|
|
case LS_dot:
|
|
S.token.flags = CPP_TFLAG_IS_OPERATOR;
|
|
switch (c){
|
|
case '*': S.token.type = CPP_TOKEN_PTRDOT; break;
|
|
default:
|
|
S.token.type = CPP_TOKEN_DOT;
|
|
pos_update_rule = PUR_back_one;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case LS_ellipsis:
|
|
switch (c){
|
|
case '.':
|
|
S.token.flags = CPP_TFLAG_IS_OPERATOR;
|
|
S.token.type = CPP_TOKEN_ELLIPSIS;
|
|
break;
|
|
|
|
default:
|
|
S.token.type = CPP_TOKEN_JUNK;
|
|
pos_update_rule = PUR_back_one;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case LS_less:
|
|
S.token.flags = CPP_TFLAG_IS_OPERATOR;
|
|
switch (c){
|
|
case '=': S.token.type = CPP_TOKEN_LESSEQ; break;
|
|
default:
|
|
S.token.type = CPP_TOKEN_LESS;
|
|
pos_update_rule = PUR_back_one;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case LS_less_less:
|
|
S.token.flags = CPP_TFLAG_IS_OPERATOR;
|
|
switch (c){
|
|
case '=': S.token.type = CPP_TOKEN_LSHIFTEQ; break;
|
|
default:
|
|
S.token.type = CPP_TOKEN_LSHIFT;
|
|
pos_update_rule = PUR_back_one;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case LS_more:
|
|
S.token.flags = CPP_TFLAG_IS_OPERATOR;
|
|
switch (c){
|
|
case '=': S.token.type = CPP_TOKEN_GRTREQ; break;
|
|
default:
|
|
S.token.type = CPP_TOKEN_GRTR;
|
|
pos_update_rule = PUR_back_one;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case LS_more_more:
|
|
S.token.flags = CPP_TFLAG_IS_OPERATOR;
|
|
switch (c){
|
|
case '=': S.token.type = CPP_TOKEN_RSHIFTEQ; break;
|
|
default:
|
|
S.token.type = CPP_TOKEN_RSHIFT;
|
|
pos_update_rule = PUR_back_one;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case LS_minus:
|
|
S.token.flags = CPP_TFLAG_IS_OPERATOR;
|
|
switch (c){
|
|
case '-': S.token.type = CPP_TOKEN_DECREMENT; break;
|
|
case '=': S.token.type = CPP_TOKEN_SUBEQ; break;
|
|
default:
|
|
S.token.type = CPP_TOKEN_MINUS;
|
|
pos_update_rule = PUR_back_one;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case LS_arrow:
|
|
S.token.flags = CPP_TFLAG_IS_OPERATOR;
|
|
switch (c){
|
|
case '*': S.token.type = CPP_TOKEN_PTRARROW; break;
|
|
default:
|
|
S.token.type = CPP_TOKEN_ARROW;
|
|
pos_update_rule = PUR_back_one;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case LS_and:
|
|
S.token.flags = CPP_TFLAG_IS_OPERATOR;
|
|
switch (c){
|
|
case '&': S.token.type = CPP_TOKEN_AND; break;
|
|
case '=': S.token.type = CPP_TOKEN_ANDEQ; break;
|
|
default:
|
|
S.token.type = CPP_TOKEN_AMPERSAND;
|
|
pos_update_rule = PUR_back_one;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case LS_or:
|
|
S.token.flags = CPP_TFLAG_IS_OPERATOR;
|
|
switch (c){
|
|
case '|': S.token.type = CPP_TOKEN_OR; break;
|
|
case '=': S.token.type = CPP_TOKEN_OREQ; break;
|
|
default:
|
|
S.token.type = CPP_TOKEN_BIT_OR;
|
|
pos_update_rule = PUR_back_one;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case LS_plus:
|
|
S.token.flags = CPP_TFLAG_IS_OPERATOR;
|
|
switch (c){
|
|
case '+': S.token.type = CPP_TOKEN_INCREMENT; break;
|
|
case '=': S.token.type = CPP_TOKEN_ADDEQ; break;
|
|
default:
|
|
S.token.type = CPP_TOKEN_PLUS;
|
|
pos_update_rule = PUR_back_one;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case LS_colon:
|
|
S.token.flags = CPP_TFLAG_IS_OPERATOR;
|
|
switch (c){
|
|
case ':': S.token.type = CPP_TOKEN_SCOPE; break;
|
|
default:
|
|
S.token.type = CPP_TOKEN_COLON;
|
|
pos_update_rule = PUR_back_one;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case LS_star:
|
|
S.token.flags = CPP_TFLAG_IS_OPERATOR;
|
|
switch (c){
|
|
case '=': S.token.type = CPP_TOKEN_MULEQ; break;
|
|
default:
|
|
S.token.type = CPP_TOKEN_STAR;
|
|
pos_update_rule = PUR_back_one;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case LS_modulo:
|
|
S.token.flags = CPP_TFLAG_IS_OPERATOR;
|
|
switch (c){
|
|
case '=': S.token.type = CPP_TOKEN_MODEQ; break;
|
|
default:
|
|
S.token.type = CPP_TOKEN_MOD;
|
|
pos_update_rule = PUR_back_one;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case LS_caret:
|
|
S.token.flags = CPP_TFLAG_IS_OPERATOR;
|
|
switch (c){
|
|
case '=': S.token.type = CPP_TOKEN_XOREQ; break;
|
|
default:
|
|
S.token.type = CPP_TOKEN_BIT_XOR;
|
|
pos_update_rule = PUR_back_one;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case LS_eq:
|
|
S.token.flags = CPP_TFLAG_IS_OPERATOR;
|
|
switch (c){
|
|
case '=': S.token.type = CPP_TOKEN_EQEQ; break;
|
|
default:
|
|
S.token.type = CPP_TOKEN_EQ;
|
|
pos_update_rule = PUR_back_one;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case LS_bang:
|
|
S.token.flags = CPP_TFLAG_IS_OPERATOR;
|
|
switch (c){
|
|
case '=': S.token.type = CPP_TOKEN_NOTEQ; break;
|
|
default:
|
|
S.token.type = CPP_TOKEN_NOT;
|
|
pos_update_rule = PUR_back_one;
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
|
|
switch (pos_update_rule){
|
|
case PUR_back_one:
|
|
--S.pos;
|
|
break;
|
|
|
|
case PUR_unget_whitespace:
|
|
c = chunk[--S.pos];
|
|
while (c == ' ' || c == '\n' || c == '\t' || c == '\r' || c == '\v' || c == '\f'){
|
|
c = chunk[--S.pos];
|
|
}
|
|
++S.pos;
|
|
break;
|
|
}
|
|
|
|
if ((S.token.flags & CPP_TFLAG_PP_DIRECTIVE) == 0){
|
|
switch (S.pp_state){
|
|
case LSPP_include:
|
|
if (S.token.type != CPP_TOKEN_INCLUDE_FILE){
|
|
S.token.type = CPP_TOKEN_JUNK;
|
|
}
|
|
S.pp_state = LSPP_junk;
|
|
break;
|
|
|
|
case LSPP_macro_identifier:
|
|
if (S.fsm.state != LS_identifier){
|
|
S.token.type = CPP_TOKEN_JUNK;
|
|
S.pp_state = LSPP_junk;
|
|
}
|
|
else{
|
|
S.pp_state = LSPP_body;
|
|
}
|
|
break;
|
|
|
|
case LSPP_identifier:
|
|
if (S.fsm.state != LS_identifier){
|
|
S.token.type = CPP_TOKEN_JUNK;
|
|
}
|
|
S.pp_state = LSPP_junk;
|
|
break;
|
|
|
|
case LSPP_number:
|
|
if (S.token.type != CPP_TOKEN_INTEGER_CONSTANT){
|
|
S.token.type = CPP_TOKEN_JUNK;
|
|
S.pp_state = LSPP_junk;
|
|
}
|
|
else{
|
|
S.pp_state = LSPP_include;
|
|
}
|
|
break;
|
|
|
|
case LSPP_junk:
|
|
S.token.type = CPP_TOKEN_JUNK;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (S.fsm.emit_token){
|
|
S.token.start = S.token_start;
|
|
if (S.pos_overide){
|
|
S.token.size = S.pos_overide - S.token_start;
|
|
S.pos_overide = 0;
|
|
}
|
|
else{
|
|
S.token.size = S.pos - S.token_start;
|
|
}
|
|
if ((S.token.flags & CPP_TFLAG_PP_DIRECTIVE) == 0){
|
|
S.token.flags |= (S.pp_state != LSPP_default)?(CPP_TFLAG_PP_BODY):(0);
|
|
}
|
|
S.token.state_flags = S.pp_state;
|
|
|
|
token_i = cpp_place_token_nonalloc(out_tokens, token_i, S.token);
|
|
if (token_i == max_token_i){
|
|
DrYield(2, LexNeedTokenMemory);
|
|
}
|
|
}
|
|
}
|
|
// NOTE(allen): else case for "if (c != 0) {...}
|
|
else{
|
|
S.completed = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
DrReturn(LexFinished);
|
|
}
|
|
|
|
#undef DrYield
|
|
#undef DrReturn
|
|
#undef DrCase
|
|
|
|
lexer_link int
|
|
cpp_lex_nonalloc(Lex_Data *S_ptr,
|
|
char *chunk, int size,
|
|
Cpp_Token_Stack *token_stack_out, int max_tokens){
|
|
Cpp_Token_Stack temp_stack = *token_stack_out;
|
|
if (temp_stack.max_count > temp_stack.count + max_tokens){
|
|
temp_stack.max_count = temp_stack.count + max_tokens;
|
|
}
|
|
|
|
int result = cpp_lex_nonalloc(S_ptr, chunk, size, &temp_stack);
|
|
|
|
token_stack_out->count = temp_stack.count;
|
|
|
|
if (result == LexNeedTokenMemory){
|
|
if (token_stack_out->count < token_stack_out->max_count){
|
|
result = LexHitTokenLimit;
|
|
}
|
|
}
|
|
|
|
return(result);
|
|
}
|
|
|
|
lexer_link int
|
|
cpp_lex_size_nonalloc(Lex_Data *S_ptr,
|
|
char *chunk, int size, int full_size,
|
|
Cpp_Token_Stack *token_stack_out){
|
|
int result = 0;
|
|
if (S_ptr->pos >= full_size){
|
|
char end_null = 0;
|
|
result = cpp_lex_nonalloc(S_ptr, &end_null, 1, token_stack_out);
|
|
}
|
|
else{
|
|
result = cpp_lex_nonalloc(S_ptr, chunk, size, token_stack_out);
|
|
if (result == LexNeedChunk){
|
|
if (S_ptr->pos >= full_size){
|
|
char end_null = 0;
|
|
result = cpp_lex_nonalloc(S_ptr, &end_null, 1, token_stack_out);
|
|
}
|
|
}
|
|
}
|
|
return(result);
|
|
}
|
|
|
|
lexer_link int
|
|
cpp_lex_size_nonalloc(Lex_Data *S_ptr,
|
|
char *chunk, int size, int full_size,
|
|
Cpp_Token_Stack *token_stack_out, int max_tokens){
|
|
Cpp_Token_Stack temp_stack = *token_stack_out;
|
|
if (temp_stack.max_count > temp_stack.count + max_tokens){
|
|
temp_stack.max_count = temp_stack.count + max_tokens;
|
|
}
|
|
|
|
int result = cpp_lex_size_nonalloc(S_ptr, chunk, size, full_size,
|
|
&temp_stack);
|
|
|
|
token_stack_out->count = temp_stack.count;
|
|
|
|
if (result == LexNeedTokenMemory){
|
|
if (token_stack_out->count < token_stack_out->max_count){
|
|
result = LexHitTokenLimit;
|
|
}
|
|
}
|
|
|
|
return(result);
|
|
}
|
|
|
|
lexer_link Cpp_Relex_State
|
|
cpp_relex_nonalloc_start(Cpp_File file, Cpp_Token_Stack *stack,
|
|
int start, int end, int amount, int tolerance){
|
|
Cpp_Relex_State state;
|
|
state.file = file;
|
|
state.stack = stack;
|
|
state.start = start;
|
|
state.end = end;
|
|
state.amount = amount;
|
|
state.tolerance = tolerance;
|
|
|
|
Cpp_Get_Token_Result result = cpp_get_token(stack, start);
|
|
|
|
state.start_token_i = result.token_index-1;
|
|
if (state.start_token_i < 0){
|
|
state.start_token_i = 0;
|
|
}
|
|
|
|
result = cpp_get_token(stack, end);
|
|
|
|
state.end_token_i = result.token_index;
|
|
if (end > stack->tokens[state.end_token_i].start){
|
|
++state.end_token_i;
|
|
}
|
|
if (state.end_token_i < 0){
|
|
state.end_token_i = 0;
|
|
}
|
|
|
|
state.relex_start = stack->tokens[state.start_token_i].start;
|
|
if (start < state.relex_start){
|
|
state.relex_start = start;
|
|
}
|
|
|
|
state.space_request = state.end_token_i - state.start_token_i + tolerance + 1;
|
|
|
|
return(state);
|
|
}
|
|
|
|
inline char
|
|
cpp_token_get_pp_state(fcpp_u16 bitfield){
|
|
return (char)(bitfield);
|
|
}
|
|
|
|
// TODO(allen): Eliminate this once we actually store the EOF token
|
|
// in the token stack.
|
|
inline Cpp_Token
|
|
cpp__get_token(Cpp_Token_Stack *stack, Cpp_Token *tokens, int size, int index){
|
|
Cpp_Token result;
|
|
if (index < stack->count){
|
|
result = tokens[index];
|
|
}
|
|
else{
|
|
result.start = size;
|
|
result.size = 0;
|
|
result.type = CPP_TOKEN_EOF;
|
|
result.flags = 0;
|
|
result.state_flags = 0;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
FCPP_LINK int
|
|
cpp_relex_nonalloc_main(Cpp_Relex_State *state,
|
|
Cpp_Token_Stack *relex_stack,
|
|
int *relex_end,
|
|
char *spare){
|
|
Cpp_Token_Stack *stack = state->stack;
|
|
Cpp_Token *tokens = stack->tokens;
|
|
|
|
cpp_shift_token_starts(stack, state->end_token_i, state->amount);
|
|
|
|
Lex_Data lex = lex_data_init(spare);
|
|
lex.pp_state = cpp_token_get_pp_state(tokens[state->start_token_i].state_flags);
|
|
lex.pos = state->relex_start;
|
|
|
|
int relex_end_i = state->end_token_i;
|
|
Cpp_Token match_token = cpp__get_token(stack, tokens, state->file.size, relex_end_i);
|
|
Cpp_Token end_token = match_token;
|
|
int went_too_far = false;
|
|
|
|
// TODO(allen): This can be better I suspect.
|
|
for (;;){
|
|
int result =
|
|
cpp_lex_size_nonalloc(&lex,
|
|
state->file.data,
|
|
state->file.size,
|
|
state->file.size,
|
|
relex_stack, 1);
|
|
|
|
switch (result){
|
|
case LexHitTokenLimit:
|
|
{
|
|
Cpp_Token token = relex_stack->tokens[relex_stack->count-1];
|
|
if (token.start == end_token.start &&
|
|
token.size == end_token.size &&
|
|
token.flags == end_token.flags &&
|
|
token.state_flags == end_token.state_flags){
|
|
--relex_stack->count;
|
|
goto double_break;
|
|
}
|
|
|
|
while (lex.pos > end_token.start && relex_end_i < stack->count){
|
|
++relex_end_i;
|
|
end_token = cpp__get_token(stack, tokens, state->file.size, relex_end_i);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case LexNeedChunk: Assert(!"Invalid path"); break;
|
|
|
|
case LexNeedTokenMemory:
|
|
went_too_far = true;
|
|
goto double_break;
|
|
|
|
case LexFinished:
|
|
goto double_break;
|
|
}
|
|
}
|
|
double_break:;
|
|
|
|
if (!went_too_far){
|
|
if (relex_stack->count > 0){
|
|
if (state->start_token_i > 0){
|
|
Cpp_Token_Merge merge =
|
|
cpp_attempt_token_merge(tokens[state->start_token_i - 1],
|
|
relex_stack->tokens[0]);
|
|
if (merge.did_merge){
|
|
--state->start_token_i;
|
|
relex_stack->tokens[0] = merge.new_token;
|
|
}
|
|
}
|
|
|
|
if (relex_end_i < state->stack->count){
|
|
Cpp_Token_Merge merge =
|
|
cpp_attempt_token_merge(relex_stack->tokens[relex_stack->count-1],
|
|
tokens[relex_end_i]);
|
|
if (merge.did_merge){
|
|
++relex_end_i;
|
|
relex_stack->tokens[relex_stack->count-1] = merge.new_token;
|
|
}
|
|
}
|
|
}
|
|
|
|
*relex_end = relex_end_i;
|
|
}
|
|
else{
|
|
cpp_shift_token_starts(stack, state->end_token_i, -state->amount);
|
|
}
|
|
|
|
return(went_too_far);
|
|
}
|
|
|
|
#endif
|
|
|
|
// BOTTOM
|