4coder/custom/4coder_token.cpp

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2019-09-27 03:52:29 +00:00
/*
* 4coder token types
*/
// TOP
internal void
token_list_push(Arena *arena, Token_List *list, Token *token){
Token_Block *block = list->last;
if (block == 0 || block->count + 1 > block->max){
block = push_array(arena, Token_Block, 1);
block->next = 0;
block->prev = 0;
u32 new_max = round_up_u32(1, KB(4));
block->tokens = push_array(arena, Token, new_max);
block->count = 0;
block->max = new_max;
zdll_push_back(list->first, list->last, block);
list->node_count += 1;
}
block_copy_struct(&block->tokens[block->count], token);
block->count += 1;
list->total_count += 1;
}
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internal void
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token_fill_memory_from_list(Token *dst, Token_List *list, i64 count){
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Token *ptr = dst;
for (Token_Block *node = list->first;
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node != 0 && count > 0;
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node = node->next){
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i64 write_count = clamp_top(node->count, count);
block_copy_dynamic_array(ptr, node->tokens, write_count);
ptr += write_count;
count -= write_count;
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}
}
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internal void
token_fill_memory_from_list(Token *dst, Token_List *list){
token_fill_memory_from_list(dst, list, list->total_count);
}
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internal Token_Array
token_array_from_list_always_copy(Arena *arena, Token_List *list){
Token_Array array = {};
if (list->node_count >= 1){
array.tokens = push_array(arena, Token, list->total_count);
token_fill_memory_from_list(array.tokens, list);
array.count = list->total_count;
array.max = array.count;
}
return(array);
}
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internal Token_Array
token_array_from_list(Arena *arena, Token_List *list){
Token_Array array = {};
if (list->node_count > 1){
array.tokens = push_array(arena, Token, list->total_count);
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token_fill_memory_from_list(array.tokens, list);
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array.count = list->total_count;
array.max = array.count;
}
else if (list->node_count == 1){
array.tokens = list->first->tokens;
array.count = list->first->count;
array.max = list->first->max;
}
return(array);
}
internal i64
token_index_from_pos(Token *tokens, i64 count, i64 pos){
i64 result = 0;
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if (count > 0){
if (pos >= tokens[count - 1].pos){
result = count - 1;
}
else if (pos <= tokens[0].pos){
result = 0;
}
else{
i64 first = 0;
i64 one_past_last = count;
for (;;){
i64 index = (first + one_past_last) >> 1;
i64 index_pos = tokens[index].pos;
if (index_pos > pos){
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one_past_last = index;
}
else if (index_pos + tokens[index].size <= pos){
first = index + 1;
}
else{
result = index;
break;
}
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}
}
}
return(result);
}
internal i64
token_index_from_pos(Token_Array *tokens, u64 pos){
return(token_index_from_pos(tokens->tokens, tokens->count, pos));
}
internal Token*
token_from_pos(Token *tokens, i64 count, i64 pos){
i64 index = token_index_from_pos(tokens, count, pos);
return(tokens + index);
}
internal Token*
token_from_pos(Token_Array *tokens, u64 pos){
i64 index = token_index_from_pos(tokens, pos);
return(tokens->tokens + index);
}
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////////////////////////////////
internal Token_Iterator_Array
token_iterator_index(u64 user_id, Token *tokens, i64 count, i64 token_index){
Token_Iterator_Array it = {};
if (tokens != 0){
it.user_id = user_id;
it.ptr = tokens + token_index;
it.tokens = tokens;
it.count = count;
}
return(it);
}
internal Token_Iterator_Array
token_iterator_index(u64 user_id, Token_Array *tokens, i64 token_index){
return(token_iterator_index(user_id, tokens->tokens, tokens->count, token_index));
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}
internal Token_Iterator_Array
token_iterator(u64 user_id, Token *tokens, i64 count, Token *token){
return(token_iterator_index(user_id, tokens, count, (i64)(token - tokens)));
}
internal Token_Iterator_Array
token_iterator(u64 user_id, Token_Array *tokens, Token *token){
return(token_iterator_index(user_id, tokens->tokens, tokens->count, (i64)(token - tokens->tokens)));
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}
internal Token_Iterator_Array
token_iterator(u64 user_id, Token *tokens, i64 count){
return(token_iterator_index(user_id, tokens, count, 0));
}
internal Token_Iterator_Array
token_iterator(u64 user_id, Token_Array *tokens){
return(token_iterator_index(user_id, tokens->tokens, tokens->count, 0));
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}
internal Token_Iterator_Array
token_iterator_pos(u64 user_id, Token *tokens, i64 count, i64 pos){
i64 index = token_index_from_pos(tokens, count, pos);
return(token_iterator_index(user_id, tokens, count, index));
}
internal Token_Iterator_Array
token_iterator_pos(u64 user_id, Token_Array *tokens, i64 pos){
i64 index = token_index_from_pos(tokens->tokens, tokens->count, pos);
return(token_iterator_index(user_id, tokens->tokens, tokens->count, index));
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}
internal Token*
token_it_read(Token_Iterator_Array *it){
Token *result = 0;
if (it->tokens != 0){
result = it->ptr;
}
return(result);
}
internal i64
token_it_index(Token_Iterator_Array *it){
return((i64)(it->ptr - it->tokens));
}
internal b32
token_it_inc_all(Token_Iterator_Array *it){
b32 result = false;
if (it->tokens != 0){
if (it->ptr < it->tokens + it->count - 1){
it->ptr += 1;
result = true;
}
}
return(result);
}
internal b32
token_it_dec_all(Token_Iterator_Array *it){
b32 result = false;
if (it->tokens != 0){
if (it->ptr > it->tokens){
it->ptr -= 1;
result = true;
}
}
return(result);
}
internal b32
token_it_inc_non_whitespace(Token_Iterator_Array *it){
b32 result = false;
repeat:
if (token_it_inc_all(it)){
Token *token = token_it_read(it);
if (token != 0 && token->kind == TokenBaseKind_Whitespace){
goto repeat;
}
result = true;
}
return(result);
}
internal b32
token_it_dec_non_whitespace(Token_Iterator_Array *it){
b32 result = false;
repeat:
if (token_it_dec_all(it)){
Token *token = token_it_read(it);
if (token != 0 && token->kind == TokenBaseKind_Whitespace){
goto repeat;
}
result = true;
}
return(result);
}
internal b32
token_it_inc(Token_Iterator_Array *it){
b32 result = false;
repeat:
if (token_it_inc_all(it)){
Token *token = token_it_read(it);
if (token != 0 && (token->kind == TokenBaseKind_Whitespace ||
token->kind == TokenBaseKind_Comment)){
goto repeat;
}
result = true;
}
return(result);
}
internal b32
token_it_dec(Token_Iterator_Array *it){
b32 result = false;
repeat:
if (token_it_dec_all(it)){
Token *token = token_it_read(it);
if (token != 0 && (token->kind == TokenBaseKind_Whitespace ||
token->kind == TokenBaseKind_Comment)){
goto repeat;
}
result = true;
}
return(result);
}
internal Token_Iterator_List
token_iterator_index(u64 user_id, Token_List *list, i64 index){
Token_Iterator_List it = {};
if (list->first != 0){
index = clamp(0, index, list->total_count - 1);
i64 base_index = 0;
Token_Block *block = 0;
for (Token_Block *node = list->first;
node != 0;
node = node->next){
if (index < base_index + node->count){
block = node;
break;
}
base_index += block->count;
}
Assert(block != 0);
it.user_id = user_id;
it.index = index;
it.ptr = block->tokens + (index - base_index);
it.block = block;
it.first = list->first;
it.last = list->last;
it.node_count = list->node_count;
it.total_count = list->total_count;
}
return(it);
}
internal Token_Iterator_List
token_iterator(u64 user_id, Token_List *list){
return(token_iterator_index(user_id, list, 0));
}
internal Token_Iterator_List
token_iterator_pos(u64 user_id, Token_List *list, i64 pos){
Token_Iterator_List it = {};
if (list->first != 0){
Token_Block *block = list->last;
Token *token = &block->tokens[block->count - 1];
i64 size = token->pos + token->size;
pos = clamp(0, pos, size);
i64 base_index = 0;
block = 0;
for (Token_Block *node = list->first;
node != 0;
node = node->next){
Token *last_token = &node->tokens[node->count - 1];
i64 one_past_last = last_token->pos + last_token->size;
if (pos < one_past_last ||
(node->next == 0 && pos == one_past_last)){
block = node;
break;
}
base_index += block->count;
}
Assert(block != 0);
i64 sub_index = token_index_from_pos(block->tokens, block->count, pos);
it.user_id = user_id;
it.index = base_index + sub_index;
it.ptr = block->tokens + sub_index;
it.block = block;
it.first = list->first;
it.last = list->last;
it.node_count = list->node_count;
it.total_count = list->total_count;
}
return(it);
}
internal Token*
token_it_read(Token_Iterator_List *it){
Token *result = 0;
if (it->block != 0){
result = it->ptr;
}
return(result);
}
internal i64
token_it_index(Token_Iterator_List *it){
return(it->index);
}
internal b32
token_it_inc_all(Token_Iterator_List *it){
b32 result = false;
if (it->block != 0){
i64 sub_index = (i64)(it->ptr - it->block->tokens);
if (sub_index + 1 < it->block->count){
it->index += 1;
it->ptr += 1;
result = true;
}
else{
if (it->block->next != 0){
it->block = it->block->next;
it->index += 1;
it->ptr = it->block->tokens;
result = true;
}
}
}
return(result);
}
internal b32
token_it_dec_all(Token_Iterator_List *it){
b32 result = false;
if (it->block != 0){
i64 sub_index = (i64)(it->ptr - it->block->tokens);
if (sub_index > 0){
it->index -= 1;
it->ptr -= 1;
result = true;
}
else{
if (it->block->prev != 0){
it->block = it->block->prev;
it->index -= 1;
it->ptr = it->block->tokens + it->block->count - 1;
result = true;
}
}
}
return(result);
}
internal b32
token_it_inc_non_whitespace(Token_Iterator_List *it){
b32 result = false;
repeat:
if (token_it_inc_all(it)){
Token *token = token_it_read(it);
if (token != 0 && token->kind == TokenBaseKind_Whitespace){
goto repeat;
}
result = true;
}
return(result);
}
internal b32
token_it_dec_non_whitespace(Token_Iterator_List *it){
b32 result = false;
repeat:
if (token_it_dec_all(it)){
Token *token = token_it_read(it);
if (token != 0 && token->kind == TokenBaseKind_Whitespace){
goto repeat;
}
result = true;
}
return(result);
}
internal b32
token_it_inc(Token_Iterator_List *it){
b32 result = false;
repeat:
if (token_it_inc_all(it)){
Token *token = token_it_read(it);
if (token != 0 && (token->kind == TokenBaseKind_Whitespace ||
token->kind == TokenBaseKind_Comment)){
goto repeat;
}
result = true;
}
return(result);
}
internal b32
token_it_dec(Token_Iterator_List *it){
b32 result = false;
repeat:
if (token_it_dec_all(it)){
Token *token = token_it_read(it);
if (token != 0 && (token->kind == TokenBaseKind_Whitespace ||
token->kind == TokenBaseKind_Comment)){
goto repeat;
}
result = true;
}
return(result);
}
internal Token_Iterator
token_iterator(Token_Iterator_Array it){
Token_Iterator result = {};
result.kind = TokenIterator_Array;
result.array = it;
return(result);
}
internal Token_Iterator
token_iterator(Token_Iterator_List it){
Token_Iterator result = {};
result.kind = TokenIterator_List;
result.list = it;
return(result);
}
internal Token*
token_it_read(Token_Iterator *it){
switch (it->kind){
case TokenIterator_Array:
{
return(token_it_read(&it->array));
}break;
case TokenIterator_List:
{
return(token_it_read(&it->list));
}break;
}
return(0);
}
internal i64
token_it_index(Token_Iterator *it){
switch (it->kind){
case TokenIterator_Array:
{
return(token_it_index(&it->array));
}break;
case TokenIterator_List:
{
return(token_it_index(&it->list));
}break;
}
return(0);
}
internal b32
token_it_inc_all(Token_Iterator *it){
switch (it->kind){
case TokenIterator_Array:
{
return(token_it_inc_all(&it->array));
}break;
case TokenIterator_List:
{
return(token_it_inc_all(&it->list));
}break;
}
return(0);
}
internal b32
token_it_dec_all(Token_Iterator *it){
switch (it->kind){
case TokenIterator_Array:
{
return(token_it_dec_all(&it->array));
}break;
case TokenIterator_List:
{
return(token_it_dec_all(&it->list));
}break;
}
return(0);
}
internal b32
token_it_inc_non_whitespace(Token_Iterator *it){
switch (it->kind){
case TokenIterator_Array:
{
return(token_it_inc_non_whitespace(&it->array));
}break;
case TokenIterator_List:
{
return(token_it_inc_non_whitespace(&it->list));
}break;
}
return(0);
}
internal b32
token_it_dec_non_whitespace(Token_Iterator *it){
switch (it->kind){
case TokenIterator_Array:
{
return(token_it_dec_non_whitespace(&it->array));
}break;
case TokenIterator_List:
{
return(token_it_dec_non_whitespace(&it->list));
}break;
}
return(0);
}
internal b32
token_it_inc(Token_Iterator *it){
switch (it->kind){
case TokenIterator_Array:
{
return(token_it_inc(&it->array));
}break;
case TokenIterator_List:
{
return(token_it_inc(&it->list));
}break;
}
return(0);
}
internal b32
token_it_dec(Token_Iterator *it){
switch (it->kind){
case TokenIterator_Array:
{
return(token_it_dec(&it->array));
}break;
case TokenIterator_List:
{
return(token_it_dec(&it->list));
}break;
}
return(0);
}
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////////////////////////////////
internal void
token_drop_eof(Token_List *list){
if (list->last != 0){
Token_Block *block = list->last;
if (block->tokens[block->count - 1].kind == TokenBaseKind_EOF){
list->total_count -= 1;
block->count -= 1;
if (block->count == 0){
zdll_remove(list->first, list->last, block);
list->node_count -= 1;
}
}
}
}
////////////////////////////////
internal i64
token_relex_first(Token_Array *tokens, i64 edit_range_first, i64 backup_repeats){
Token_Iterator_Array it = token_iterator_pos(0, tokens, edit_range_first);
b32 good_status = true;
for (i64 i = 0; i < backup_repeats && good_status; i += 1){
good_status = token_it_dec(&it);
}
if (good_status){
for (;;){
Token *token = token_it_read(&it);
if (!HasFlag(token->flags, TokenBaseFlag_PreprocessorBody)){
break;
}
if (!token_it_dec(&it)){
break;
}
}
}
return(token_it_index(&it));
}
internal i64
token_relex_resync(Token_Array *tokens, i64 edit_range_first, i64 look_ahead_repeats){
Token_Iterator_Array it = token_iterator_pos(0, tokens, edit_range_first);
b32 good_status = true;
for (i64 i = 0; i < look_ahead_repeats && good_status; i += 1){
good_status = token_it_inc(&it);
}
if (good_status){
for (;;){
Token *token = token_it_read(&it);
if (!HasFlag(token->flags, TokenBaseFlag_PreprocessorBody)){
break;
}
if (!token_it_inc(&it)){
break;
}
}
}
return(token_it_index(&it));
}
internal Token_Relex
token_relex(Token_List relex_list, i64 new_pos_to_old_pos_shift, Token *tokens, i64 relex_first, i64 relex_last){
Token_Relex relex = {};
if (relex_list.total_count > 0){
Token_Array relexed_tokens = {tokens + relex_first, relex_last - relex_first + 1};
Token_Iterator_List it = token_iterator_index(0, &relex_list, relex_list.total_count - 1);
for (;;){
Token *token = token_it_read(&it);
i64 new_pos_rebased = token->pos + new_pos_to_old_pos_shift;
i64 old_token_index = token_index_from_pos(&relexed_tokens, new_pos_rebased);
Token *old_token = relexed_tokens.tokens + old_token_index;
if (new_pos_rebased == old_token->pos &&
token->size == old_token->size &&
token->kind == old_token->kind &&
token->sub_kind == old_token->sub_kind &&
token->flags == old_token->flags &&
token->sub_flags == old_token->sub_flags){
relex.successful_resync = true;
relex.first_resync_index = relex_first + old_token_index;
}
else{
break;
}
if (!token_it_dec_all(&it)){
break;
}
}
}
return(relex);
}
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// BOTTOM