4coder/test/4cpp_new_lexer.h

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// TOP
#ifndef FCPP_NEW_LEXER_INC
#define FCPP_NEW_LEXER_INC
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#include "4cpp_lexer_fsms.h"
#include "4cpp_lexer_tables.c"
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#define lexer_link static
// TODO(allen): revisit this keyword data declaration system
struct String_List{
String_And_Flag *data;
int count;
};
struct Sub_Match_List_Result{
int index;
fcpp_i32 new_pos;
};
#define lexer_string_list(x) {x, (sizeof(x)/sizeof(*x))}
static String_And_Flag bool_lit_strings[] = {
{"true"}, {"false"}
};
static String_List bool_lits = lexer_string_list(bool_lit_strings);
static String_And_Flag keyword_strings[] = {
{"and", CPP_TOKEN_AND},
{"and_eq", CPP_TOKEN_ANDEQ},
{"bitand", CPP_TOKEN_BIT_AND},
{"bitor", CPP_TOKEN_BIT_OR},
{"or", CPP_TOKEN_OR},
{"or_eq", CPP_TOKEN_OREQ},
{"sizeof", CPP_TOKEN_SIZEOF},
{"alignof", CPP_TOKEN_ALIGNOF},
{"decltype", CPP_TOKEN_DECLTYPE},
{"throw", CPP_TOKEN_THROW},
{"new", CPP_TOKEN_NEW},
{"delete", CPP_TOKEN_DELETE},
{"xor", CPP_TOKEN_BIT_XOR},
{"xor_eq", CPP_TOKEN_XOREQ},
{"not", CPP_TOKEN_NOT},
{"not_eq", CPP_TOKEN_NOTEQ},
{"typeid", CPP_TOKEN_TYPEID},
{"compl", CPP_TOKEN_BIT_NOT},
{"void", CPP_TOKEN_KEY_TYPE},
{"bool", CPP_TOKEN_KEY_TYPE},
{"char", CPP_TOKEN_KEY_TYPE},
{"int", CPP_TOKEN_KEY_TYPE},
{"float", CPP_TOKEN_KEY_TYPE},
{"double", CPP_TOKEN_KEY_TYPE},
{"long", CPP_TOKEN_KEY_MODIFIER},
{"short", CPP_TOKEN_KEY_MODIFIER},
{"unsigned", CPP_TOKEN_KEY_MODIFIER},
{"const", CPP_TOKEN_KEY_QUALIFIER},
{"volatile", CPP_TOKEN_KEY_QUALIFIER},
{"asm", CPP_TOKEN_KEY_CONTROL_FLOW},
{"break", CPP_TOKEN_KEY_CONTROL_FLOW},
{"case", CPP_TOKEN_KEY_CONTROL_FLOW},
{"catch", CPP_TOKEN_KEY_CONTROL_FLOW},
{"continue", CPP_TOKEN_KEY_CONTROL_FLOW},
{"default", CPP_TOKEN_KEY_CONTROL_FLOW},
{"do", CPP_TOKEN_KEY_CONTROL_FLOW},
{"else", CPP_TOKEN_KEY_CONTROL_FLOW},
{"for", CPP_TOKEN_KEY_CONTROL_FLOW},
{"goto", CPP_TOKEN_KEY_CONTROL_FLOW},
{"if", CPP_TOKEN_KEY_CONTROL_FLOW},
{"return", CPP_TOKEN_KEY_CONTROL_FLOW},
{"switch", CPP_TOKEN_KEY_CONTROL_FLOW},
{"try", CPP_TOKEN_KEY_CONTROL_FLOW},
{"while", CPP_TOKEN_KEY_CONTROL_FLOW},
{"static_assert", CPP_TOKEN_KEY_CONTROL_FLOW},
{"const_cast", CPP_TOKEN_KEY_CAST},
{"dynamic_cast", CPP_TOKEN_KEY_CAST},
{"reinterpret_cast", CPP_TOKEN_KEY_CAST},
{"static_cast", CPP_TOKEN_KEY_CAST},
{"class", CPP_TOKEN_KEY_TYPE_DECLARATION},
{"enum", CPP_TOKEN_KEY_TYPE_DECLARATION},
{"struct", CPP_TOKEN_KEY_TYPE_DECLARATION},
{"typedef", CPP_TOKEN_KEY_TYPE_DECLARATION},
{"union", CPP_TOKEN_KEY_TYPE_DECLARATION},
{"template", CPP_TOKEN_KEY_TYPE_DECLARATION},
{"typename", CPP_TOKEN_KEY_TYPE_DECLARATION},
{"friend", CPP_TOKEN_KEY_ACCESS},
{"namespace", CPP_TOKEN_KEY_ACCESS},
{"private", CPP_TOKEN_KEY_ACCESS},
{"protected", CPP_TOKEN_KEY_ACCESS},
{"public", CPP_TOKEN_KEY_ACCESS},
{"using", CPP_TOKEN_KEY_ACCESS},
{"extern", CPP_TOKEN_KEY_LINKAGE},
{"export", CPP_TOKEN_KEY_LINKAGE},
{"inline", CPP_TOKEN_KEY_LINKAGE},
{"static", CPP_TOKEN_KEY_LINKAGE},
{"virtual", CPP_TOKEN_KEY_LINKAGE},
{"alignas", CPP_TOKEN_KEY_OTHER},
{"explicit", CPP_TOKEN_KEY_OTHER},
{"noexcept", CPP_TOKEN_KEY_OTHER},
{"nullptr", CPP_TOKEN_KEY_OTHER},
{"operator", CPP_TOKEN_KEY_OTHER},
{"register", CPP_TOKEN_KEY_OTHER},
{"this", CPP_TOKEN_KEY_OTHER},
{"thread_local", CPP_TOKEN_KEY_OTHER},
};
static String_List keywords = lexer_string_list(keyword_strings);
lexer_link Sub_Match_List_Result
sub_match_list(char *chunk, int size, int pos, String_List list, int sub_size){
Sub_Match_List_Result result;
String str_main;
char *str_check;
int i,l;
result.index = -1;
result.new_pos = pos;
str_main = make_string(chunk + pos, size - pos);
if (sub_size > 0){
str_main = substr(str_main, 0, sub_size);
for (i = 0; i < list.count; ++i){
str_check = list.data[i].str;
if (match(str_main, str_check)){
result.index = i;
result.new_pos = pos + sub_size;
break;
}
}
}
else{
for (i = 0; i < list.count; ++i){
str_check = list.data[i].str;
if (match_part(str_main, str_check, &l)){
result.index = i;
result.new_pos = pos + l;
break;
}
}
}
return result;
}
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lexer_link Cpp_Get_Token_Result
cpp_get_token(Cpp_Token_Stack *token_stack, int pos){
Cpp_Get_Token_Result result = {};
Cpp_Token *token_array = token_stack->tokens;
Cpp_Token *token = 0;
int first = 0;
int count = token_stack->count;
int last = count;
int this_start = 0, next_start = 0;
if (count > 0){
for (;;){
result.token_index = (first + last)/2;
token = token_array + result.token_index;
this_start = token->start;
if (result.token_index + 1 < count){
next_start = (token + 1)->start;
}
else{
next_start = this_start + token->size;
}
if (this_start <= pos && pos < next_start){
break;
}
else if (pos < this_start){
last = result.token_index;
}
else{
first = result.token_index + 1;
}
if (first == last){
result.token_index = first;
break;
}
}
if (result.token_index == count){
--result.token_index;
result.in_whitespace = 1;
}
else{
if (token->start + token->size <= pos){
result.in_whitespace = 1;
}
}
}
else{
result.token_index = -1;
result.in_whitespace = 1;
}
return(result);
}
lexer_link void
cpp_shift_token_starts(Cpp_Token_Stack *stack, int from_token_i, int shift_amount){
Cpp_Token *token = stack->tokens + from_token_i;
int count = stack->count, i;
for (i = from_token_i; i < count; ++i, ++token){
token->start += shift_amount;
}
}
enum Pos_Update_Rule{
PUR_none,
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PUR_back_one,
PUR_unget_whitespace,
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};
lexer_link Lex_PP_State
cpp_pp_directive_to_state(Cpp_Token_Type type){
Lex_PP_State result = LSPP_default;
switch (type){
case CPP_PP_INCLUDE:
case CPP_PP_IMPORT:
case CPP_PP_USING:
result = LSPP_include;
break;
case CPP_PP_DEFINE:
result = LSPP_macro_identifier;
break;
case CPP_PP_UNDEF:
case CPP_PP_IFDEF:
case CPP_PP_IFNDEF:
result = LSPP_identifier;
break;
case CPP_PP_IF:
case CPP_PP_ELIF:
result = LSPP_body_if;
break;
case CPP_PP_PRAGMA:
result = LSPP_body;
break;
case CPP_PP_LINE:
result = LSPP_number;
break;
case CPP_PP_ERROR:
result = LSPP_error;
break;
case CPP_PP_UNKNOWN:
case CPP_PP_ELSE:
case CPP_PP_ENDIF:
result = LSPP_junk;
break;
}
return(result);
}
lexer_link Cpp_Token_Merge
cpp_attempt_token_merge(Cpp_Token prev_token, Cpp_Token next_token){
Cpp_Token_Merge result = {(Cpp_Token_Type)0};
if (next_token.type == CPP_TOKEN_COMMENT && prev_token.type == CPP_TOKEN_COMMENT &&
next_token.flags == prev_token.flags && next_token.state_flags == prev_token.state_flags){
result.did_merge = 1;
prev_token.size = next_token.start + next_token.size - prev_token.start;
result.new_token = prev_token;
}
else if (next_token.type == CPP_TOKEN_JUNK && prev_token.type == CPP_TOKEN_JUNK &&
next_token.flags == prev_token.flags && next_token.state_flags == prev_token.state_flags){
result.did_merge = 1;
prev_token.size = next_token.start + next_token.size - prev_token.start;
result.new_token = prev_token;
}
return result;
}
lexer_link void
cpp_push_token_nonalloc(Cpp_Token *out_tokens, int *token_i, Cpp_Token token){
Cpp_Token_Merge merge = {(Cpp_Token_Type)0};
Cpp_Token prev_token = {(Cpp_Token_Type)0};
if (*token_i > 0){
prev_token = out_tokens[*token_i - 1];
merge = new_lex::cpp_attempt_token_merge(prev_token, token);
if (merge.did_merge){
out_tokens[*token_i - 1] = merge.new_token;
}
}
if (!merge.did_merge){
out_tokens[(*token_i)++] = token;
}
}
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struct Lex_Data{
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char *tb;
int tb_pos;
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int token_start;
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int pos;
int pos_overide;
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Lex_FSM fsm;
Whitespace_FSM wfsm;
unsigned char pp_state;
unsigned char completed;
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unsigned short *key_eq_classes;
unsigned char *key_table;
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Cpp_Token token;
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int __pc__;
};
#define DrCase(PC) case PC: goto resumespot_##PC
#define DrYield(PC, n) {\
token_stack_out->count = token_i;\
*S_ptr = S; S_ptr->__pc__ = PC; return(n); resumespot_##PC:; }
#define DrReturn(n) {\
token_stack_out->count = token_i;\
*S_ptr = S; S_ptr->__pc__ = -1; return(n); }
lexer_link int
cpp_lex_nonalloc(Lex_Data *S_ptr, char *chunk, int size, Cpp_Token_Stack *token_stack_out){
Lex_Data S = *S_ptr;
Cpp_Token *out_tokens = token_stack_out->tokens;
int token_i = token_stack_out->count;
int max_token_i = token_stack_out->max_count;
Pos_Update_Rule pos_update_rule = PUR_none;
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char c = 0;
int end_pos = size + S.pos;
chunk -= S.pos;
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switch (S.__pc__){
DrCase(1);
DrCase(2);
DrCase(3);
DrCase(4);
DrCase(5);
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DrCase(6);
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DrCase(7);
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}
for (;;){
S.wfsm.white_done = 0;
S.wfsm.pp_state = S.pp_state;
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];
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){
DrYield(4, 1);
}
else break;
}
--S.pos;
S.pp_state = S.wfsm.pp_state;
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if (S.pp_state >= LSPP_count){
S.pp_state -= LSPP_count;
}
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S.token_start = S.pos;
S.tb_pos = 0;
S.fsm = {0};
for(;;){
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unsigned short *eq_classes = get_eq_classes[S.pp_state];
unsigned char *fsm_table = get_table[S.pp_state];
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for (; S.fsm.state < LS_count && S.pos < end_pos;){
c = chunk[S.pos++];
S.tb[S.tb_pos++] = c;
int i = S.fsm.state + eq_classes[c];
S.fsm.state = fsm_table[i];
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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if (S.fsm.emit_token == 0){
DrYield(3, 1);
}
else break;
}
Assert(S.fsm.emit_token == 1);
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;
if (S.pp_state == LSPP_include){
switch (S.fsm.state){
case LSINC_default:break;
case LSINC_quotes:
case LSINC_pointy:
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S.token.type = CPP_TOKEN_INCLUDE_FILE;
S.token.flags = 0;
break;
case LSINC_junk:
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S.token.type = CPP_TOKEN_JUNK;
S.token.flags = 0;
break;
}
}
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else{
switch (S.fsm.state){
case LS_default:
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);
OperCase('}', CPP_TOKEN_BRACE_CLOSE);
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OperCase('[', CPP_TOKEN_BRACKET_OPEN);
OperCase(']', CPP_TOKEN_BRACKET_CLOSE);
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OperCase('(', CPP_TOKEN_PARENTHESE_OPEN);
OperCase(')', CPP_TOKEN_PARENTHESE_CLOSE);
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OperCase('~', CPP_TOKEN_TILDE);
OperCase(',', CPP_TOKEN_COMMA);
OperCase(';', CPP_TOKEN_SEMICOLON);
OperCase('?', CPP_TOKEN_TERNARY_QMARK);
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OperCase('@', CPP_TOKEN_JUNK);
OperCase('$', CPP_TOKEN_JUNK);
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#undef OperCase
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case '\\':
if (S.pp_state == LSPP_default){
S.token.type = CPP_TOKEN_JUNK;
}
else{
S.pos_overide = S.pos;
S.wfsm.white_done = 0;
for (;;){
for (; S.wfsm.white_done == 0 && S.pos < end_pos;){
c = chunk[S.pos++];
if (!(c == ' ' || c == '\t' || c == '\r' || c == '\v' || c == '\f')) S.wfsm.white_done = 1;
}
if (S.wfsm.white_done == 0){
DrYield(1, 1);
}
else break;
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}
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if (c == '\n'){
S.fsm.emit_token = 0;
S.pos_overide = 0;
}
else{
S.token.type = CPP_TOKEN_JUNK;
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}
}
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break;
}
if (c != '@' && c != '$' && c != '\\'){
S.token.flags = CPP_TFLAG_IS_OPERATOR;
}
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break;
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case LS_identifier:
{
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S.fsm.state = 0;
S.fsm.emit_token = 0;
S.fsm.sub_machine = 0;
--S.pos;
for (;;){
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// TODO(allen): Need to drop down to the instructions to optimize
// this correctly I think. This looks like it will have more branches
// than it needs unless I am very careful.
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for (; S.fsm.state < LSKEY_totally_finished && S.pos < end_pos;){
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// TODO(allen): Rebase these super tables so that we don't have
// to do a subtract on the state.
S.key_table = key_tables[S.fsm.sub_machine];
S.key_eq_classes = key_eq_class_tables[S.fsm.sub_machine];
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for (; S.fsm.state < LSKEY_table_transition && S.pos < end_pos;){
c = chunk[S.pos++];
S.fsm.state = S.key_table[S.fsm.state + S.key_eq_classes[c]];
}
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if (S.fsm.state >= LSKEY_table_transition && S.fsm.state < LSKEY_totally_finished){
S.fsm.sub_machine = S.fsm.state - LSKEY_table_transition;
S.fsm.state = 0;
}
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}
S.fsm.emit_token = (S.fsm.int_state >= LSKEY_totally_finished);
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if (S.fsm.emit_token == 0){
DrYield(7, 1);
}
else break;
}
--S.pos;
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// TODO(allen): do stuff regarding the actual type of the token
S.token.type = CPP_TOKEN_INTEGER_CONSTANT;
S.token.flags = 0;
#if 0
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--S.pos;
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int word_size = S.pos - S.token_start;
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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;
}
}
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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){
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S.token.type = CPP_TOKEN_BOOLEAN_CONSTANT;
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S.token.flags = CPP_TFLAG_IS_KEYWORD;
}
else{
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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;
}
}
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#endif
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}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;
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case LS_pp:
{
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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);
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if (S.fsm.emit_token == 0){
DrYield(6, 1);
}
else break;
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}
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--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{
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S.token.flags = CPP_TFLAG_PP_DIRECTIVE;
S.pp_state = (unsigned char)cpp_pp_directive_to_state(S.token.type);
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}
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}break;
case LS_number:
case LS_number0:
case LS_hex:
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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);
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if (S.fsm.emit_token == 0){
DrYield(5, 1);
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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.token.type = CPP_TOKEN_INTEGER_CONSTANT;
S.token.flags = 0;
break;
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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;
}
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break;
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case LS_char:
S.token.type = CPP_TOKEN_CHARACTER_CONSTANT;
S.token.flags = 0;
break;
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case LS_char_multiline:
S.token.type = CPP_TOKEN_CHARACTER_CONSTANT;
S.token.flags = CPP_TFLAG_MULTILINE;
break;
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case LS_string:
S.token.type = CPP_TOKEN_STRING_CONSTANT;
S.token.flags = 0;
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break;
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case LS_string_multiline:
S.token.type = CPP_TOKEN_STRING_CONSTANT;
S.token.flags = CPP_TFLAG_MULTILINE;
break;
case LS_comment_pre:
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S.token.flags = CPP_TFLAG_IS_OPERATOR;
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switch (c){
case '=': S.token.type = CPP_TOKEN_DIVEQ; break;
default:
S.token.type = CPP_TOKEN_DIV;
pos_update_rule = PUR_back_one;
break;
}
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break;
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case LS_comment: case LS_comment_block_ending:
S.token.type = CPP_TOKEN_COMMENT;
S.token.flags = 0;
pos_update_rule = PUR_unget_whitespace;
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break;
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case LS_error_message:
S.token.type = CPP_TOKEN_ERROR_MESSAGE;
S.token.flags = 0;
pos_update_rule = PUR_unget_whitespace;
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break;
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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;
}
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break;
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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;
}
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break;
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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;
}
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break;
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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;
}
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break;
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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;
}
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break;
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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;
}
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break;
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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;
}
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break;
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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;
}
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break;
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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;
}
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break;
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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;
}
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break;
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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;
}
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break;
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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;
}
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break;
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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;
}
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break;
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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;
}
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break;
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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;
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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;
}
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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;
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}
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];
}
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++S.pos;
break;
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}
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;
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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;
}
}
}
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if (S.fsm.emit_token){
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S.token.start = S.token_start;
if (S.pos_overide){
S.token.size = S.pos_overide - S.token_start;
S.pos_overide = 0;
}
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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;
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cpp_push_token_nonalloc(out_tokens, &token_i, S.token);
if (token_i == max_token_i){
DrYield(2, 2);
}
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}
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}
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// NOTE(allen): else case for "if (c != 0) {...}
else{
S.completed = 1;
break;
}
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}
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DrReturn(0);
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}
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#undef DrYield
#undef DrReturn
#undef DrCase
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#endif
// BOTTOM