4coder/4coder_helper/4coder_long_seek.h

1083 lines
34 KiB
C
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/*
* Helpers for doing long range seeks.
*/
// TOP
#if !defined(FCODER_LONG_SEEK_H)
#define FCODER_LONG_SEEK_H
#include "4coder_helper/4coder_streaming.h"
#include "4coder_lib/4coder_mem.h"
#include "4coder_lib/4cpp_lexer.h"
//
// Whitespace Based Seeks
//
static int32_t
seek_line_end(Application_Links *app, Buffer_Summary *buffer, int32_t pos){
char chunk[1024];
int32_t chunk_size = sizeof(chunk);
Stream_Chunk stream = {0};
int32_t still_looping;
char at_pos;
if (init_stream_chunk(&stream, app, buffer, pos, chunk, chunk_size)){
still_looping = 1;
do{
for (; pos < stream.end; ++pos){
at_pos = stream.data[pos];
if (at_pos == '\n'){
goto double_break;
}
}
still_looping = forward_stream_chunk(&stream);
}while(still_looping);
double_break:;
if (pos > buffer->size){
pos = buffer->size;
}
}
return(pos);
}
static int32_t
seek_line_beginning(Application_Links *app, Buffer_Summary *buffer, int32_t pos){
char chunk[1024];
int32_t chunk_size = sizeof(chunk);
Stream_Chunk stream = {0};
int32_t still_looping;
char at_pos;
--pos;
if (init_stream_chunk(&stream, app, buffer, pos, chunk, chunk_size)){
still_looping = 1;
do{
for (; pos >= stream.start; --pos){
at_pos = stream.data[pos];
if (at_pos == '\n'){
goto double_break;
}
}
still_looping = backward_stream_chunk(&stream);
}while(still_looping);
double_break:;
if (pos != 0){
++pos;
}
if (pos < 0){
pos = 0;
}
}
return(pos);
}
static void
move_past_lead_whitespace(Application_Links *app, View_Summary *view, Buffer_Summary *buffer){
refresh_view(app, view);
int32_t new_pos = seek_line_beginning(app, buffer, view->cursor.pos);
char space[1024];
Stream_Chunk chunk = {0};
int32_t still_looping = false;
int32_t i = new_pos;
if (init_stream_chunk(&chunk, app, buffer, i, space, sizeof(space))){
do{
for (; i < chunk.end; ++i){
char at_pos = chunk.data[i];
if (at_pos == '\n' || !char_is_whitespace(at_pos)){
goto break2;
}
}
still_looping = forward_stream_chunk(&chunk);
}while(still_looping);
break2:;
if (i > view->cursor.pos){
view_set_cursor(app, view, seek_pos(i), true);
}
}
}
static int32_t
buffer_seek_whitespace_up(Application_Links *app, Buffer_Summary *buffer, int32_t pos){
char chunk[1024];
int32_t chunk_size = sizeof(chunk);
Stream_Chunk stream = {0};
char at_pos;
--pos;
if (init_stream_chunk(&stream, app, buffer, pos, chunk, chunk_size)){
// Step 1: Find the first non-whitespace character
// behind the current position.
int32_t still_looping = 1;
while (still_looping){
for (; pos >= stream.start; --pos){
at_pos = stream.data[pos];
if (!char_is_whitespace(at_pos)){
goto double_break_1;
}
}
still_looping = backward_stream_chunk(&stream);
}
double_break_1:;
// Step 2: Continue scanning backward, at each '\n'
// mark the beginning of another line by setting
// no_hard to true, set it back to false if a
// non-whitespace character is discovered before
// the next '\n'
int32_t no_hard = false;
while (still_looping){
for (; pos >= stream.start; --pos){
at_pos = stream.data[pos];
if (at_pos == '\n'){
if (no_hard){
goto double_break_2;
}
else{
no_hard = true;
}
}
else if (!char_is_whitespace(at_pos)){
no_hard = false;
}
}
still_looping = backward_stream_chunk(&stream);
}
double_break_2:;
if (pos != 0){
++pos;
}
}
return(pos);
}
static int32_t
buffer_seek_whitespace_down(Application_Links *app, Buffer_Summary *buffer, int32_t pos){
char chunk[1024];
int32_t chunk_size = sizeof(chunk);
Stream_Chunk stream = {0};
if (init_stream_chunk(&stream, app, buffer, pos, chunk, chunk_size)){
// step 1: find the first non-whitespace character
// ahead of the current position.
2017-03-29 16:32:06 +00:00
bool32 still_looping = true;
do{
for (; pos < stream.end; ++pos){
2017-03-29 16:32:06 +00:00
char at_pos = stream.data[pos];
if (!char_is_whitespace(at_pos)){
goto double_break_1;
}
}
still_looping = forward_stream_chunk(&stream);
} while(still_looping);
double_break_1:;
// step 2: continue scanning forward, at each '\n'
// mark it as the beginning of a new line by updating
// the prev_endline value. if another '\n' is found
// with non-whitespace then the previous line was
// all whitespace.
2017-03-29 16:32:06 +00:00
bool32 no_hard = false;
int32_t prev_endline = -1;
while(still_looping){
for (; pos < stream.end; ++pos){
2017-03-29 16:32:06 +00:00
char at_pos = stream.data[pos];
if (at_pos == '\n'){
if (no_hard){
goto double_break_2;
}
else{
no_hard = true;
prev_endline = pos;
}
}
else if (!char_is_whitespace(at_pos)){
no_hard = false;
}
}
still_looping = forward_stream_chunk(&stream);
}
double_break_2:;
if (prev_endline == -1 || prev_endline+1 >= buffer->size){
pos = buffer->size;
}
else{
pos = prev_endline+1;
}
}
return(pos);
}
static int32_t
buffer_seek_whitespace_right(Application_Links *app, Buffer_Summary *buffer, int32_t pos){
char data_chunk[1024];
Stream_Chunk stream = {0};
2017-03-29 16:32:06 +00:00
if (init_stream_chunk(&stream, app, buffer, pos, data_chunk, sizeof(data_chunk))){
2017-03-29 16:32:06 +00:00
bool32 still_looping = true;
do{
for (; pos < stream.end; ++pos){
if (!char_is_whitespace(stream.data[pos])){
goto double_break1;
}
}
still_looping = forward_stream_chunk(&stream);
}while(still_looping);
double_break1:;
2017-03-29 16:32:06 +00:00
still_looping = true;
do{
for (; pos < stream.end; ++pos){
if (char_is_whitespace(stream.data[pos])){
goto double_break2;
}
}
still_looping = forward_stream_chunk(&stream);
}while(still_looping);
double_break2:;
}
return(pos);
}
static int32_t
buffer_seek_whitespace_left(Application_Links *app, Buffer_Summary *buffer, int32_t pos){
char data_chunk[1024];
Stream_Chunk stream = {0};
--pos;
if (pos > 0){
if (init_stream_chunk(&stream, app, buffer,
pos, data_chunk, sizeof(data_chunk))){
bool32 still_looping = 1;
do{
for (; pos >= stream.start; --pos){
if (!char_is_whitespace(stream.data[pos])){
goto double_break1;
}
}
still_looping = backward_stream_chunk(&stream);
}while(still_looping);
double_break1:;
still_looping = 1;
do{
for (; pos >= stream.start; --pos){
if (char_is_whitespace(stream.data[pos])){
++pos;
goto double_break2;
}
}
still_looping = backward_stream_chunk(&stream);
}while(still_looping);
double_break2:;
}
}
else{
pos = 0;
}
return(pos);
}
//
// Boundary Type Seeks
//
static int32_t
buffer_seek_alphanumeric_right(Application_Links *app, Buffer_Summary *buffer, int32_t pos){
char data_chunk[1024];
Stream_Chunk stream = {0};
2017-03-29 16:32:06 +00:00
if (init_stream_chunk(&stream, app, buffer, pos, data_chunk, sizeof(data_chunk))){
2017-03-29 16:32:06 +00:00
bool32 still_looping = true;
do{
for (; pos < stream.end; ++pos){
if (char_is_alpha_numeric_true_utf8(stream.data[pos])){
goto double_break1;
}
}
still_looping = forward_stream_chunk(&stream);
}while(still_looping);
double_break1:;
2017-03-29 16:32:06 +00:00
still_looping = true;
do{
for (; pos < stream.end; ++pos){
if (!char_is_alpha_numeric_true_utf8(stream.data[pos])){
goto double_break2;
}
}
still_looping = forward_stream_chunk(&stream);
}while(still_looping);
double_break2:;
}
return(pos);
}
static int32_t
buffer_seek_alphanumeric_left(Application_Links *app, Buffer_Summary *buffer, int32_t pos){
char data_chunk[1024];
Stream_Chunk stream = {0};
--pos;
if (pos > 0){
if (init_stream_chunk(&stream, app, buffer, pos, data_chunk, sizeof(data_chunk))){
2017-03-29 16:32:06 +00:00
bool32 still_looping = true;
do{
for (; pos >= stream.start; --pos){
if (char_is_alpha_numeric_true_utf8(stream.data[pos])){
goto double_break1;
}
}
still_looping = backward_stream_chunk(&stream);
}while(still_looping);
double_break1:;
2017-03-29 16:32:06 +00:00
still_looping = true;
do{
for (; pos >= stream.start; --pos){
if (!char_is_alpha_numeric_true_utf8(stream.data[pos])){
++pos;
goto double_break2;
}
}
still_looping = backward_stream_chunk(&stream);
}while(still_looping);
double_break2:;
}
}
else{
pos = 0;
}
return(pos);
}
2017-03-29 16:32:06 +00:00
static int32_t
buffer_seek_alphanumeric_or_underscore_right(Application_Links *app, Buffer_Summary *buffer, int32_t pos){
char data_chunk[1024];
Stream_Chunk stream = {0};
if (init_stream_chunk(&stream, app, buffer, pos, data_chunk, sizeof(data_chunk))){
bool32 still_looping = true;
do{
for (; pos < stream.end; ++pos){
if (char_is_alpha_numeric_utf8(stream.data[pos])){
goto double_break1;
}
}
still_looping = forward_stream_chunk(&stream);
}while(still_looping);
double_break1:;
still_looping = true;
do{
for (; pos < stream.end; ++pos){
if (!char_is_alpha_numeric_utf8(stream.data[pos])){
goto double_break2;
}
}
still_looping = forward_stream_chunk(&stream);
}while(still_looping);
double_break2:;
}
return(pos);
}
static int32_t
buffer_seek_alphanumeric_or_underscore_left(Application_Links *app, Buffer_Summary *buffer, int32_t pos){
char data_chunk[1024];
Stream_Chunk stream = {0};
--pos;
if (pos > 0){
if (init_stream_chunk(&stream, app, buffer, pos, data_chunk, sizeof(data_chunk))){
bool32 still_looping = true;
do{
for (; pos >= stream.start; --pos){
if (char_is_alpha_numeric_utf8(stream.data[pos])){
goto double_break1;
}
}
still_looping = backward_stream_chunk(&stream);
}while(still_looping);
double_break1:;
still_looping = true;
do{
for (; pos >= stream.start; --pos){
if (!char_is_alpha_numeric_utf8(stream.data[pos])){
++pos;
goto double_break2;
}
}
still_looping = backward_stream_chunk(&stream);
}while(still_looping);
double_break2:;
}
}
else{
pos = 0;
}
return(pos);
}
static int32_t
buffer_seek_range_camel_right(Application_Links *app, Buffer_Summary *buffer, int32_t pos, int32_t an_pos){
char data_chunk[1024];
Stream_Chunk stream = {0};
++pos;
if (pos < an_pos){
stream.max_end = an_pos;
if (init_stream_chunk(&stream, app, buffer, pos, data_chunk, sizeof(data_chunk))){
2017-03-30 15:18:16 +00:00
uint8_t c = 0, pc = stream.data[pos];
++pos;
2017-03-30 15:18:16 +00:00
bool32 still_looping = false;
do{
for (; pos < stream.end; ++pos){
c = stream.data[pos];
2017-03-30 15:18:16 +00:00
if (char_is_upper(c) && char_is_lower_utf8(pc)){
goto double_break1;
}
2017-03-30 15:18:16 +00:00
pc = c;
}
still_looping = forward_stream_chunk(&stream);
}while(still_looping);
double_break1:;
}
}
else{
pos = an_pos;
}
return(pos);
}
static int32_t
buffer_seek_range_camel_left(Application_Links *app, Buffer_Summary *buffer, int32_t pos, int32_t an_pos){
char data_chunk[1024];
Stream_Chunk stream = {0};
--pos;
if (pos > 0){
stream.min_start = an_pos+1;
if (init_stream_chunk(&stream, app, buffer, pos, data_chunk, sizeof(data_chunk))){
2017-03-30 15:18:16 +00:00
char c = 0, pc = stream.data[pos];
2017-03-30 15:18:16 +00:00
bool32 still_looping = false;
do{
for (; pos >= stream.start; --pos){
c = stream.data[pos];
2017-03-30 15:18:16 +00:00
if (char_is_upper(c) && char_is_lower_utf8(pc)){
goto double_break1;
}
2017-03-30 15:18:16 +00:00
pc = c;
}
still_looping = backward_stream_chunk(&stream);
}while(still_looping);
double_break1:;
}
}
else{
pos = 0;
}
return(pos);
}
static int32_t
buffer_seek_alphanumeric_or_camel_right(Application_Links *app, Buffer_Summary *buffer, int32_t pos){
int32_t an_pos = buffer_seek_alphanumeric_right(app, buffer, pos);
int32_t result = buffer_seek_range_camel_right(app, buffer, pos, an_pos);
return(result);
}
static int32_t
buffer_seek_alphanumeric_or_camel_left(Application_Links *app, Buffer_Summary *buffer, int32_t pos){
int32_t an_pos = buffer_seek_alphanumeric_left(app, buffer, pos);
int32_t result = buffer_seek_range_camel_left(app, buffer, pos, an_pos);
return(result);
}
static int32_t
seek_token_left(Cpp_Token_Array *tokens, int32_t pos){
Cpp_Get_Token_Result get = cpp_get_token(*tokens, pos);
if (get.token_index == -1){
get.token_index = 0;
}
Cpp_Token *token = tokens->tokens + get.token_index;
if (token->start == pos && get.token_index > 0){
--token;
}
return(token->start);
}
static int32_t
seek_token_right(Cpp_Token_Array *tokens, int32_t pos){
Cpp_Get_Token_Result get = cpp_get_token(*tokens, pos);
if (get.in_whitespace){
++get.token_index;
}
if (get.token_index >= tokens->count){
get.token_index = tokens->count-1;
}
Cpp_Token *token = tokens->tokens + get.token_index;
return(token->start + token->size);
}
static Cpp_Token_Array
buffer_get_all_tokens(Application_Links *app, Partition *part, Buffer_Summary *buffer){
Cpp_Token_Array array = {0};
if (buffer->exists && buffer->is_lexed){
array.count = buffer_token_count(app, buffer);
array.max_count = array.count;
array.tokens = push_array(part, Cpp_Token, array.count);
buffer_read_tokens(app, buffer, 0, array.count, array.tokens);
}
return(array);
}
static int32_t
buffer_boundary_seek(Application_Links *app, Buffer_Summary *buffer, Partition *part, int32_t start_pos, bool32 seek_forward, Seek_Boundary_Flag flags)/*
DOC_PARAM(buffer, The buffer parameter specifies the buffer through which to seek.)
DOC_PARAM(start_pos, The beginning position of the seek is specified by start_pos measured in absolute position.)
DOC_PARAM(seek_forward, If this parameter is non-zero it indicates that the seek should move foward through the buffer.)
DOC_PARAM(flags, This field specifies the types of boundaries at which the seek should stop.)
DOC_RETURN(This call returns the absolute position where the seek stopped.
If the seek goes below 0 the returned value is -1.
If the seek goes past the end the returned value is the size of the buffer.)
DOC_SEE(Seek_Boundary_Flag)
DOC_SEE(4coder_Buffer_Positioning_System)
*/{
int32_t result = 0;
// TODO(allen): reduce duplication?
Temp_Memory temp = begin_temp_memory(part);
if (buffer->exists){
int32_t pos[4];
int32_t size = buffer->size;
int32_t new_pos = 0;
if (start_pos < 0){
start_pos = 0;
}
else if (start_pos > size){
start_pos = size;
}
if (seek_forward){
for (int32_t i = 0; i < ArrayCount(pos); ++i){
pos[i] = size;
}
if (flags & BoundaryWhitespace){
pos[0] = buffer_seek_whitespace_right(app, buffer, start_pos);
}
if (flags & BoundaryToken){
if (buffer->tokens_are_ready){
Cpp_Token_Array array = buffer_get_all_tokens(app, part, buffer);
pos[1] = seek_token_right(&array, start_pos);
}
else{
pos[1] = buffer_seek_whitespace_right(app, buffer, start_pos);
}
}
if (flags & BoundaryAlphanumeric){
pos[2] = buffer_seek_alphanumeric_right(app, buffer, start_pos);
if (flags & BoundaryCamelCase){
pos[3] = buffer_seek_range_camel_right(app, buffer, start_pos, pos[2]);
}
}
else{
if (flags & BoundaryCamelCase){
pos[3] = buffer_seek_alphanumeric_or_camel_right(app, buffer, start_pos);
}
}
new_pos = size;
for (int32_t i = 0; i < ArrayCount(pos); ++i){
if (pos[i] < new_pos){
new_pos = pos[i];
}
}
}
else{
for (int32_t i = 0; i < ArrayCount(pos); ++i){
pos[i] = 0;
}
if (flags & BoundaryWhitespace){
pos[0] = buffer_seek_whitespace_left(app, buffer, start_pos);
}
if (flags & BoundaryToken){
if (buffer->tokens_are_ready){
Cpp_Token_Array array = buffer_get_all_tokens(app, part, buffer);
pos[1] = seek_token_left(&array, start_pos);
}
else{
pos[1] = buffer_seek_whitespace_left(app, buffer, start_pos);
}
}
if (flags & BoundaryAlphanumeric){
pos[2] = buffer_seek_alphanumeric_left(app, buffer, start_pos);
if (flags & BoundaryCamelCase){
pos[3] = buffer_seek_range_camel_left(app, buffer, start_pos, pos[2]);
}
}
else{
if (flags & BoundaryCamelCase){
pos[3] = buffer_seek_alphanumeric_or_camel_left(app, buffer, start_pos);
}
}
new_pos = 0;
for (int32_t i = 0; i < ArrayCount(pos); ++i){
if (pos[i] > new_pos){
new_pos = pos[i];
}
}
}
result = new_pos;
}
end_temp_memory(temp);
return(result);
}
//
// Character Seeks
//
void
buffer_seek_delimiter_forward(Application_Links *app, Buffer_Summary *buffer, int32_t pos, char delim, int32_t *result){
if (buffer->exists){
char chunk[1024];
int32_t size = sizeof(chunk);
Stream_Chunk stream = {0};
if (init_stream_chunk(&stream, app, buffer, pos, chunk, size)){
int32_t still_looping = 1;
do{
for(; pos < stream.end; ++pos){
char at_pos = stream.data[pos];
if (at_pos == delim){
*result = pos;
goto finished;
}
}
still_looping = forward_stream_chunk(&stream);
}while (still_looping);
}
}
*result = buffer->size;
finished:;
}
static void
buffer_seek_delimiter_backward(Application_Links *app, Buffer_Summary *buffer, int32_t pos, char delim, int32_t *result){
if (buffer->exists){
char chunk[1024];
int32_t size = sizeof(chunk);
Stream_Chunk stream = {0};
if (init_stream_chunk(&stream, app, buffer, pos, chunk, size)){
int32_t still_looping = 1;
do{
for(; pos >= stream.start; --pos){
char at_pos = stream.data[pos];
if (at_pos == delim){
*result = pos;
goto finished;
}
}
still_looping = backward_stream_chunk(&stream);
}while (still_looping);
}
}
*result = 0;
finished:;
}
//
// Buffer Substring Seeks
//
// TODO(allen): This duplication is driving me crazy... I've gotta
// upgrade the meta programming system another level.
// NOTE(allen): This is limitted to a string size of 512.
// You can push it up or do something more clever by just
// replacing char read_buffer[512]; with more memory.
static void
buffer_seek_string_forward(Application_Links *app, Buffer_Summary *buffer, int32_t pos, int32_t end, char *str, int32_t size, int32_t *result){
char read_buffer[512];
if (buffer->size > end){
*result = buffer->size;
}
else{
*result = end;
}
if (size > 0 && size <= sizeof(read_buffer)){
if (buffer->exists){
String read_str = make_fixed_width_string(read_buffer);
String needle_str = make_string(str, size);
char first_char = str[0];
read_str.size = size;
char chunk[1024];
Stream_Chunk stream = {0};
stream.max_end = end;
if (init_stream_chunk(&stream, app, buffer, pos, chunk, sizeof(chunk))){
int32_t still_looping = 1;
do{
for(; pos < stream.end; ++pos){
char at_pos = stream.data[pos];
if (at_pos == first_char){
buffer_read_range(app, buffer, pos, pos+size, read_buffer);
if (match_ss(needle_str, read_str)){
*result = pos;
goto finished;
}
}
}
still_looping = forward_stream_chunk(&stream);
}while (still_looping);
}
}
if (end == 0){
*result = buffer->size;
}
else{
*result = end;
}
finished:;
}
}
// NOTE(allen): This is limitted to a string size of 512.
// You can push it up or do something more clever by just
// replacing char read_buffer[512]; with more memory.
static void
buffer_seek_string_backward(Application_Links *app, Buffer_Summary *buffer, int32_t pos, int32_t min, char *str, int32_t size, int32_t *result){
char read_buffer[512];
*result = min-1;
if (size > 0 && size <= sizeof(read_buffer)){
if (buffer->exists){
String read_str = make_fixed_width_string(read_buffer);
String needle_str = make_string(str, size);
char first_char = str[0];
read_str.size = size;
char chunk[1024];
Stream_Chunk stream = {0};
stream.min_start = min;
if (init_stream_chunk(&stream, app, buffer, pos, chunk, sizeof(chunk))){
int32_t still_looping = 1;
do{
for(; pos >= stream.start; --pos){
char at_pos = stream.data[pos];
if (at_pos == first_char){
buffer_read_range(app, buffer, pos, pos+size, read_buffer);
if (match_ss(needle_str, read_str)){
*result = pos;
goto finished;
}
}
}
still_looping = backward_stream_chunk(&stream);
}while (still_looping);
}
}
finished:;
}
}
// NOTE(allen): This is limitted to a string size of 512.
// You can push it up or do something more clever by just
// replacing char read_buffer[512]; with more memory.
static void
buffer_seek_string_insensitive_forward(Application_Links *app, Buffer_Summary *buffer, int32_t pos, int32_t end, char *str, int32_t size, int32_t *result){
char read_buffer[512];
char chunk[1024];
int32_t chunk_size = sizeof(chunk);
Stream_Chunk stream = {0};
stream.max_end = end;
if (buffer->size > end){
*result = buffer->size;
}
else{
*result = end;
}
if (size > 0 && size <= sizeof(read_buffer)){
if (buffer->exists){
String read_str = make_fixed_width_string(read_buffer);
String needle_str = make_string(str, size);
char first_char = char_to_upper(str[0]);
read_str.size = size;
if (init_stream_chunk(&stream, app, buffer, pos, chunk, chunk_size)){
int32_t still_looping = 1;
do{
for(; pos < stream.end; ++pos){
char at_pos = char_to_upper(stream.data[pos]);
if (at_pos == first_char){
buffer_read_range(app, buffer, pos, pos+size, read_buffer);
if (match_insensitive_ss(needle_str, read_str)){
*result = pos;
goto finished;
}
}
}
still_looping = forward_stream_chunk(&stream);
}while (still_looping);
}
}
finished:;
}
}
// NOTE(allen): This is limitted to a string size of 512.
// You can push it up or do something more clever by just
// replacing char read_buffer[512]; with more memory.
static void
buffer_seek_string_insensitive_backward(Application_Links *app, Buffer_Summary *buffer, int32_t pos, int32_t min, char *str, int32_t size, int32_t *result){
char read_buffer[512];
char chunk[1024];
int32_t chunk_size = sizeof(chunk);
Stream_Chunk stream = {0};
stream.min_start = min;
*result = min-1;
if (size > 0 && size <= sizeof(read_buffer)){
if (buffer->exists){
String read_str = make_fixed_width_string(read_buffer);
String needle_str = make_string(str, size);
char first_char = char_to_upper(str[0]);
read_str.size = size;
if (init_stream_chunk(&stream, app, buffer, pos, chunk, chunk_size)){
int32_t still_looping = 1;
do{
for(; pos >= stream.start; --pos){
char at_pos = char_to_upper(stream.data[pos]);
if (at_pos == first_char){
buffer_read_range(app, buffer, pos, pos+size, read_buffer);
if (match_insensitive_ss(needle_str, read_str)){
*result = pos;
goto finished;
}
}
}
still_looping = backward_stream_chunk(&stream);
}while (still_looping);
}
}
finished:;
}
}
//
// Buffer Line Positioning
//
2017-04-15 21:47:23 +00:00
static bool32
read_line(Application_Links *app, Partition *part, Buffer_Summary *buffer, int32_t line, String *str){
Partial_Cursor begin = {0};
Partial_Cursor end = {0};
2017-04-15 21:47:23 +00:00
bool32 success = false;
if (buffer_compute_cursor(app, buffer, seek_line_char(line, 1), &begin)){
if (buffer_compute_cursor(app, buffer, seek_line_char(line, -1), &end)){
if (begin.line == line){
if (0 <= begin.pos && begin.pos <= end.pos && end.pos <= buffer->size){
int32_t size = (end.pos - begin.pos);
int32_t alloc_size = size + 1;
char *memory = push_array(part, char, alloc_size);
if (memory != 0){
*str = make_string(memory, 0, alloc_size);
2017-04-15 21:47:23 +00:00
success = true;
buffer_read_range(app, buffer, begin.pos, end.pos, str->str);
str->size = size;
terminate_with_null(str);
}
}
}
}
}
return(success);
}
static int32_t
buffer_get_line_start(Application_Links *app, Buffer_Summary *buffer, int32_t line){
Partial_Cursor partial_cursor;
int32_t result = buffer->size;
if (line <= buffer->line_count){
buffer_compute_cursor(app, buffer, seek_line_char(line, 1), &partial_cursor);
result = partial_cursor.pos;
}
return(result);
}
static int32_t
buffer_get_line_end(Application_Links *app, Buffer_Summary *buffer, int32_t line){
Partial_Cursor partial_cursor;
int32_t result = buffer->size;
if (line <= buffer->line_count){
buffer_compute_cursor(app, buffer, seek_line_char(line, -1), &partial_cursor);
result = partial_cursor.pos;
}
return(result);
}
static bool32
buffer_line_is_blank(Application_Links *app, Buffer_Summary *buffer, int32_t line){
Partial_Cursor start, end;
bool32 result = 0;
if (line <= buffer->line_count){
buffer_compute_cursor(app, buffer, seek_line_char(line, 1), &start);
buffer_compute_cursor(app, buffer, seek_line_char(line, -1), &end);
static const int32_t chunk_size = 1024;
char chunk[chunk_size];
Stream_Chunk stream = {0};
int32_t i = start.pos;
stream.max_end = end.pos;
result = true;
if (init_stream_chunk(&stream, app, buffer, i, chunk, chunk_size)){
bool32 still_looping = false;
do{
for (;i < stream.end; ++i){
char c = stream.data[i];
if (!(c == ' ' || c == '\t' || c == '\r' || c == '\v' || c == '\n')){
result = false;
goto double_break;
}
}
still_looping = forward_stream_chunk(&stream);
}while(still_looping);
}
double_break:;
}
return(result);
}
static int32_t
buffer_get_line_number(Application_Links *app, Buffer_Summary *buffer, int32_t pos){
Partial_Cursor partial_cursor = {0};
buffer_compute_cursor(app, buffer, seek_pos(pos), &partial_cursor);
return(partial_cursor.line);
}
static Cpp_Token*
get_first_token_at_line(Application_Links *app, Buffer_Summary *buffer, Cpp_Token_Array tokens, int32_t line, int32_t *line_start_out = 0){
int32_t line_start = buffer_get_line_start(app, buffer, line);
Cpp_Get_Token_Result get_token = cpp_get_token(tokens, line_start);
if (get_token.in_whitespace){
get_token.token_index += 1;
}
if (line_start_out){
*line_start_out = line_start;
}
Cpp_Token *result = 0;
if (get_token.token_index < tokens.count){
result = &tokens.tokens[get_token.token_index];
}
return(result);
}
2017-03-29 16:32:06 +00:00
static String
read_identifier_at_pos(Application_Links *app, Buffer_Summary *buffer, int32_t pos, char *space, int32_t max, Range *range_out){
String query = {0};
int32_t start = buffer_seek_alphanumeric_or_underscore_left(app, buffer, pos);
int32_t end = buffer_seek_alphanumeric_or_underscore_right(app, buffer, start);
if (!(start <= pos && pos < end)){
end = buffer_seek_alphanumeric_or_underscore_right(app, buffer, pos);
start = buffer_seek_alphanumeric_or_underscore_left(app, buffer, end);
}
if (start <= pos && pos < end){
int32_t size = end - start;
if (size <= max){
if (range_out != 0){
*range_out = make_range(start, end);
}
buffer_read_range(app, buffer, start, end, space);
query = make_string_cap(space, size, max);
}
}
return(query);
}
#endif
// BOTTOM