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Optimize line iterator

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This commit is contained in:
Syed Daanish
2025-12-19 20:46:52 +00:00
parent 8002012705
commit 7307387f64
8 changed files with 136 additions and 130 deletions
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2
README.md
View File

@@ -6,8 +6,6 @@ A TUI IDE.
# TODO
- [ ] Overwrite empty space between line number and line. (in the renderer)
- [ ] Make iterator for next/prev line reuse same allocation buffer (so only free once with iterator).
- [ ] Add tab/untab with [,<] and [.>]
- [ ] Add something that works like `p` but doesnt move cursor.
- [ ] Fix the fact that hooks arent updated when a line is deleted/added.

2
include/knot.h
View File

@@ -27,6 +27,8 @@ typedef struct LineIterator {
uint8_t top;
uint32_t offset;
Knot *stack[64];
char *buffer;
size_t capacity;
} LineIterator;
typedef struct LeafIterator {

14
src/editor.cc
View File

@@ -92,12 +92,12 @@ void render_editor(Editor *editor) {
case LINE:
LineIterator *it = begin_l_iter(editor->root, editor->selection.row);
char *line = next_line(it, &line_len);
free(it);
if (!line)
return;
if (line_len > 0 && line[line_len - 1] == '\n')
line_len--;
free(line);
free(it->buffer);
free(it);
end = {editor->selection.row, line_len};
break;
}
@@ -122,7 +122,7 @@ void render_editor(Editor *editor) {
update(editor->position.row + rendered_rows, editor->position.col, "",
0xAAAAAA, 0, 0);
char buf[16];
int len = snprintf(buf, sizeof(buf), "%*u", numlen - 3, fold->start + 1);
int len = snprintf(buf, sizeof(buf), "%*u ", numlen - 3, fold->start + 1);
uint32_t num_color =
editor->cursor.row == fold->start ? 0xFFFFFF : 0x555555;
for (int i = 0; i < len; i++)
@@ -148,7 +148,6 @@ void render_editor(Editor *editor) {
if (line_len > 0 && line[line_len - 1] == '\n')
global_byte_offset--;
global_byte_offset++;
free(line);
line_index++;
}
continue;
@@ -179,7 +178,8 @@ void render_editor(Editor *editor) {
update(editor->position.row + rendered_rows, editor->position.col, hook,
0xAAAAAA, 0, 0);
char buf[16];
int len = snprintf(buf, sizeof(buf), "%*u", numlen - 3, line_index + 1);
int len =
snprintf(buf, sizeof(buf), "%*u ", numlen - 3, line_index + 1);
uint32_t num_color =
editor->cursor.row == line_index ? 0xFFFFFF : 0x555555;
for (int i = 0; i < len; i++)
@@ -270,7 +270,7 @@ void render_editor(Editor *editor) {
update(editor->position.row + rendered_rows, editor->position.col, hook,
0xAAAAAA, 0, 0);
char buf[16];
int len = snprintf(buf, sizeof(buf), "%*u", numlen - 3, line_index + 1);
int len = snprintf(buf, sizeof(buf), "%*u ", numlen - 3, line_index + 1);
uint32_t num_color =
editor->cursor.row == line_index ? 0xFFFFFF : 0x555555;
for (int i = 0; i < len; i++)
@@ -298,7 +298,6 @@ void render_editor(Editor *editor) {
}
global_byte_offset += line_len + 1;
line_index++;
free(line);
}
if (cursor.row != UINT32_MAX && cursor.col != UINT32_MAX) {
int type = 0;
@@ -322,5 +321,6 @@ void render_editor(Editor *editor) {
" ", 0xFFFFFF, 0, 0);
rendered_rows++;
}
free(it->buffer);
free(it);
}

128
src/editor_ctrl.cc
View File

@@ -48,7 +48,6 @@ void word_boundaries_exclusive(Editor *editor, Coord coord, uint32_t *prev_col,
return;
uint32_t line_len;
char *line = next_line(it, &line_len);
free(it);
if (!line)
return;
if (line_len && line[line_len - 1] == '\n')
@@ -62,7 +61,8 @@ void word_boundaries_exclusive(Editor *editor, Coord coord, uint32_t *prev_col,
*prev_col = left;
if (next_col)
*next_col = right;
free(line);
free(it->buffer);
free(it);
}
uint32_t word_jump_right(const char *line, size_t len, uint32_t pos) {
@@ -99,7 +99,6 @@ void word_boundaries(Editor *editor, Coord coord, uint32_t *prev_col,
return;
uint32_t line_len;
char *line = next_line(it, &line_len);
free(it);
if (!line)
return;
if (line_len && line[line_len - 1] == '\n')
@@ -117,7 +116,8 @@ void word_boundaries(Editor *editor, Coord coord, uint32_t *prev_col,
*prev_clusters = count_clusters(line, line_len, left, col);
if (next_clusters)
*next_clusters = count_clusters(line, line_len, col, right);
free(line);
free(it->buffer);
free(it);
}
Coord editor_hit_test(Editor *editor, uint32_t x, uint32_t y) {
@@ -140,6 +140,7 @@ Coord editor_hit_test(Editor *editor, uint32_t x, uint32_t y) {
const Fold *fold = fold_for_line(editor->folds, line_index);
if (fold) {
if (visual_row == target_visual_row) {
free(it->buffer);
free(it);
if (is_gutter_click) {
remove_fold(editor, fold->start);
@@ -152,7 +153,6 @@ Coord editor_hit_test(Editor *editor, uint32_t x, uint32_t y) {
char *l = next_line(it, nullptr);
if (!l)
break;
free(l);
line_index++;
}
continue;
@@ -177,7 +177,7 @@ Coord editor_hit_test(Editor *editor, uint32_t x, uint32_t y) {
if (col + w > render_width)
break;
if (visual_row == target_visual_row && x < col + w) {
free(line);
free(it->buffer);
free(it);
return {line_index, offset + advance};
}
@@ -187,7 +187,7 @@ Coord editor_hit_test(Editor *editor, uint32_t x, uint32_t y) {
col += w;
}
if (visual_row == target_visual_row) {
free(line);
free(it->buffer);
free(it);
return {line_index, last_good_offset};
}
@@ -200,9 +200,9 @@ Coord editor_hit_test(Editor *editor, uint32_t x, uint32_t y) {
if (line_len == 0)
break;
}
free(line);
line_index++;
}
free(it->buffer);
free(it);
return editor->scroll;
}
@@ -215,16 +215,18 @@ Coord move_right_pure(Editor *editor, Coord cursor, uint32_t number) {
uint32_t col = result.col;
uint32_t line_len = 0;
LineIterator *it = begin_l_iter(editor->root, row);
char *line = next_line(it, &line_len);
free(it);
if (!line)
if (!it)
return result;
char *line = next_line(it, &line_len);
if (!line) {
free(it->buffer);
free(it);
return result;
}
if (line_len > 0 && line[line_len - 1] == '\n')
--line_len;
while (number > 0) {
if (col >= line_len) {
free(line);
line = nullptr;
uint32_t next_row = row + 1;
if (next_row >= editor->root->line_count) {
col = line_len;
@@ -232,9 +234,7 @@ Coord move_right_pure(Editor *editor, Coord cursor, uint32_t number) {
}
row = next_row;
col = 0;
it = begin_l_iter(editor->root, row);
line = next_line(it, &line_len);
free(it);
if (!line)
break;
if (line_len > 0 && line[line_len - 1] == '\n')
@@ -248,8 +248,8 @@ Coord move_right_pure(Editor *editor, Coord cursor, uint32_t number) {
}
number--;
}
if (line)
free(line);
free(it->buffer);
free(it);
result.row = row;
result.col = col;
return result;
@@ -265,6 +265,7 @@ Coord move_left_pure(Editor *editor, Coord cursor, uint32_t number) {
LineIterator *it = begin_l_iter(editor->root, row);
char *line = next_line(it, &len);
if (!line) {
free(it->buffer);
free(it);
return result;
}
@@ -276,10 +277,9 @@ Coord move_left_pure(Editor *editor, Coord cursor, uint32_t number) {
if (row == 0)
break;
if (iterator_ahead) {
free(prev_line(it, nullptr));
prev_line(it, nullptr);
iterator_ahead = false;
}
free(line);
line = nullptr;
row--;
line = prev_line(it, &len);
@@ -301,8 +301,7 @@ Coord move_left_pure(Editor *editor, Coord cursor, uint32_t number) {
}
number--;
}
if (line)
free(line);
free(it->buffer);
free(it);
result.row = row;
result.col = col;
@@ -317,41 +316,58 @@ Coord move_right(Editor *editor, Coord cursor, uint32_t number) {
uint32_t col = result.col;
uint32_t line_len = 0;
LineIterator *it = begin_l_iter(editor->root, row);
char *line = next_line(it, &line_len);
free(it);
if (!line)
if (!it)
return result;
uint32_t target_row = next_unfolded_row(editor, row);
while (row < target_row) {
if (!next_line(it, &line_len)) {
free(it->buffer);
free(it);
return result;
}
++row;
}
char *line = next_line(it, &line_len);
if (!line) {
free(it->buffer);
free(it);
return result;
}
if (line_len > 0 && line[line_len - 1] == '\n')
--line_len;
while (number > 0) {
if (col >= line_len) {
free(line);
line = nullptr;
uint32_t next_row = next_unfolded_row(editor, row + 1);
if (next_row >= editor->root->line_count) {
col = line_len;
break;
}
row = next_row;
while (row < next_row) {
line = next_line(it, &line_len);
if (!line) {
free(it->buffer);
free(it);
result.row = row;
result.col = col;
return result;
}
++row;
}
col = 0;
it = begin_l_iter(editor->root, row);
line = next_line(it, &line_len);
free(it);
if (!line)
break;
if (line_len > 0 && line[line_len - 1] == '\n')
--line_len;
continue;
} else {
uint32_t inc =
grapheme_next_character_break_utf8(line + col, line_len - col);
if (inc == 0)
break;
col += inc;
--number;
}
number--;
}
if (line)
free(line);
free(it->buffer);
free(it);
result.row = row;
result.col = col;
return result;
@@ -367,6 +383,7 @@ Coord move_left(Editor *editor, Coord cursor, uint32_t number) {
LineIterator *it = begin_l_iter(editor->root, row);
char *line = next_line(it, &len);
if (!line) {
free(it->buffer);
free(it);
return result;
}
@@ -378,10 +395,9 @@ Coord move_left(Editor *editor, Coord cursor, uint32_t number) {
if (row == 0)
break;
if (iterator_ahead) {
free(prev_line(it, nullptr));
prev_line(it, nullptr);
iterator_ahead = false;
}
free(line);
line = nullptr;
while (row > 0) {
row--;
@@ -391,14 +407,10 @@ Coord move_left(Editor *editor, Coord cursor, uint32_t number) {
const Fold *fold = fold_for_line(editor->folds, row);
if (fold) {
while (line && row > fold->start) {
free(line);
line = prev_line(it, &len);
row--;
}
if (line) {
free(line);
line = nullptr;
}
line = nullptr;
continue;
}
break;
@@ -421,8 +433,7 @@ Coord move_left(Editor *editor, Coord cursor, uint32_t number) {
}
number--;
}
if (line)
free(line);
free(it->buffer);
free(it);
result.row = row;
result.col = col;
@@ -435,14 +446,14 @@ void cursor_down(Editor *editor, uint32_t number) {
uint32_t len;
LineIterator *it = begin_l_iter(editor->root, editor->cursor.row);
char *line_content = next_line(it, &len);
free(it);
if (line_content == nullptr)
return;
if (editor->cursor_preffered == UINT32_MAX)
editor->cursor_preffered =
get_visual_col_from_bytes(line_content, len, editor->cursor.col);
uint32_t visual_col = editor->cursor_preffered;
free(line_content);
free(it->buffer);
free(it);
uint32_t target_row = editor->cursor.row;
while (number > 0 && target_row < editor->root->line_count - 1) {
target_row = next_unfolded_row(editor, target_row + 1);
@@ -454,14 +465,14 @@ void cursor_down(Editor *editor, uint32_t number) {
}
it = begin_l_iter(editor->root, target_row);
line_content = next_line(it, &len);
free(it);
if (!line_content)
return;
if (len > 0 && line_content[len - 1] == '\n')
--len;
editor->cursor.row = target_row;
editor->cursor.col = get_bytes_from_visual_col(line_content, len, visual_col);
free(line_content);
free(it->buffer);
free(it);
}
void cursor_up(Editor *editor, uint32_t number) {
@@ -470,14 +481,14 @@ void cursor_up(Editor *editor, uint32_t number) {
uint32_t len;
LineIterator *it = begin_l_iter(editor->root, editor->cursor.row);
char *line_content = next_line(it, &len);
free(it);
if (!line_content)
return;
if (editor->cursor_preffered == UINT32_MAX)
editor->cursor_preffered =
get_visual_col_from_bytes(line_content, len, editor->cursor.col);
uint32_t visual_col = editor->cursor_preffered;
free(line_content);
free(it->buffer);
free(it);
uint32_t target_row = editor->cursor.row;
while (number > 0 && target_row > 0) {
target_row = prev_unfolded_row(editor, target_row - 1);
@@ -489,18 +500,18 @@ void cursor_up(Editor *editor, uint32_t number) {
}
it = begin_l_iter(editor->root, target_row);
line_content = next_line(it, &len);
free(it);
if (line_content) {
if (len > 0 && line_content[len - 1] == '\n')
--len;
editor->cursor.row = target_row;
editor->cursor.col =
get_bytes_from_visual_col(line_content, len, visual_col);
free(line_content);
} else {
editor->cursor.row = 0;
editor->cursor.col = 0;
}
free(it->buffer);
free(it);
}
void cursor_right(Editor *editor, uint32_t number) {
@@ -525,7 +536,6 @@ void move_line_up(Editor *editor) {
std::shared_lock lock(editor->knot_mtx);
LineIterator *it = begin_l_iter(editor->root, editor->cursor.row);
char *line = next_line(it, &line_len);
free(it);
if (!line) {
lock.unlock();
return;
@@ -543,7 +553,8 @@ void move_line_up(Editor *editor) {
edit_erase(editor, {cursor.row, 0}, -1);
edit_insert(editor, {cursor.row - up_by, 0}, (char *)"\n", 1);
edit_insert(editor, {cursor.row - up_by, 0}, line, line_len);
free(line);
free(it->buffer);
free(it);
editor->cursor = {cursor.row - up_by, cursor.col};
} else if (mode == SELECT) {
uint32_t start_row = MIN(editor->cursor.row, editor->selection.row);
@@ -576,7 +587,6 @@ void move_line_down(Editor *editor) {
std::shared_lock lock(editor->knot_mtx);
LineIterator *it = begin_l_iter(editor->root, editor->cursor.row);
char *line = next_line(it, &line_len);
free(it);
if (!line) {
lock.unlock();
return;
@@ -601,7 +611,8 @@ void move_line_down(Editor *editor) {
edit_erase(editor, {cursor.row, 0}, -1);
edit_insert(editor, {cursor.row + down_by, 0}, (char *)"\n", 1);
edit_insert(editor, {cursor.row + down_by, 0}, line, line_len);
free(line);
free(it->buffer);
free(it);
editor->cursor = {cursor.row + down_by, cursor.col};
} else if (mode == SELECT) {
if (editor->cursor.row >= editor->root->line_count - 1 ||
@@ -811,12 +822,13 @@ char *get_selection(Editor *editor, uint32_t *out_len) {
case LINE:
LineIterator *it = begin_l_iter(editor->root, editor->selection.row);
char *line = next_line(it, &line_len);
free(it);
if (!line)
return nullptr;
if (line_len > 0 && line[line_len - 1] == '\n')
line_len--;
end = {editor->selection.row, line_len};
free(it->buffer);
free(it);
break;
}
}
@@ -877,13 +889,11 @@ bool add_fold(Editor *editor, uint32_t start, uint32_t end) {
end = std::min(end, editor->root->line_count - 1);
if (start == end)
return false;
Fold new_fold{start, end};
auto &folds = editor->folds;
auto it = std::lower_bound(
folds.begin(), folds.end(), new_fold.start,
[](const Fold &fold, uint32_t value) { return fold.start < value; });
if (it != folds.begin()) {
auto prev = std::prev(it);
if (prev->end + 1 >= new_fold.start) {

20
src/editor_events.cc
View File

@@ -70,12 +70,12 @@ void handle_editor_event(Editor *editor, KeyEvent event) {
uint32_t line_len;
LineIterator *it = begin_l_iter(editor->root, p.row);
char *line = next_line(it, &line_len);
free(it);
if (!line)
return;
if (line_len > 0 && line[line_len - 1] == '\n')
line_len--;
free(line);
free(it->buffer);
free(it);
editor->cursor = {p.row, line_len};
}
editor->cursor_preffered = UINT32_MAX;
@@ -115,12 +115,12 @@ void handle_editor_event(Editor *editor, KeyEvent event) {
} else {
LineIterator *it = begin_l_iter(editor->root, p.row);
char *line = next_line(it, &line_len);
free(it);
if (!line)
return;
if (line_len > 0 && line[line_len - 1] == '\n')
line_len--;
free(line);
free(it->buffer);
free(it);
editor->cursor = {p.row, line_len};
}
break;
@@ -216,9 +216,9 @@ void handle_editor_event(Editor *editor, KeyEvent event) {
break;
if (line_len > 0 && line[line_len - 1] == '\n')
line_len--;
free(it);
line_len = count_clusters(line, line_len, 0, line_len);
free(line);
free(it->buffer);
free(it);
editor->cursor.col = line_len;
editor->cursor_preffered = UINT32_MAX;
mode = SELECT;
@@ -305,7 +305,6 @@ void handle_editor_event(Editor *editor, KeyEvent event) {
uint32_t line_len = 0;
LineIterator *it = begin_l_iter(editor->root, editor->cursor.row);
char *line = next_line(it, &line_len);
free(it);
bool closing = false;
if (line && line_len > 0 && line[line_len - 1] == '\n')
line_len--;
@@ -314,8 +313,9 @@ void handle_editor_event(Editor *editor, KeyEvent event) {
if (indent == 0)
indent = leading_indent(line, line_len);
closing = closing_after_cursor(line, line_len, editor->cursor.col);
free(line);
}
free(it->buffer);
free(it);
uint32_t closing_indent =
indent >= INDENT_WIDTH ? indent - INDENT_WIDTH : 0;
std::string insert_text("\n");
@@ -366,10 +366,10 @@ void handle_editor_event(Editor *editor, KeyEvent event) {
if (!it)
return;
char *line = next_line(it, nullptr);
free(it);
char prev_char = line[prev_pos.col];
char next_char = line[editor->cursor.col];
free(line);
free(it->buffer);
free(it);
bool is_pair = (prev_char == '{' && next_char == '}') ||
(prev_char == '(' && next_char == ')') ||
(prev_char == '[' && next_char == ']') ||

4
src/editor_indents.cc
View File

@@ -23,10 +23,10 @@ uint32_t get_indent(Editor *editor, Coord cursor) {
if (line_len == 0)
continue;
uint32_t indent = leading_indent(line, line_len);
free(line);
free(it);
return indent;
}
free(it->buffer);
free(it);
return 0;
}

38
src/editor_scroll.cc
View File

@@ -18,6 +18,7 @@ void scroll_up(Editor *editor, int32_t number) {
uint32_t len;
char *line = next_line(it, &len);
if (!line) {
free(it->buffer);
free(it);
return;
}
@@ -45,24 +46,24 @@ void scroll_up(Editor *editor, int32_t number) {
++it_seg) {
if (--number == 0) {
editor->scroll = {line_index, *it_seg};
free(line);
free(it->buffer);
free(it);
return;
}
}
free(line);
line = prev_line(it, &len);
if (!line) {
editor->scroll = {0, 0};
free(it->buffer);
free(it);
return;
}
free(line);
do {
line_index--;
line = prev_line(it, &len);
if (!line) {
editor->scroll = {0, 0};
free(it->buffer);
free(it);
return;
}
@@ -74,19 +75,20 @@ void scroll_up(Editor *editor, int32_t number) {
line_index--;
if (!line) {
editor->scroll = {0, 0};
free(it->buffer);
free(it);
return;
}
}
if (--number == 0) {
editor->scroll = {fold->start, 0};
free(line);
free(it->buffer);
free(it);
return;
}
free(line);
if (fold->start == 0) {
editor->scroll = {0, 0};
free(it->buffer);
free(it);
return;
}
@@ -94,6 +96,7 @@ void scroll_up(Editor *editor, int32_t number) {
line = prev_line(it, &len);
if (!line) {
editor->scroll = {0, 0};
free(it->buffer);
free(it);
return;
}
@@ -121,13 +124,13 @@ void scroll_up(Editor *editor, int32_t number) {
++it_seg) {
if (--number == 0) {
editor->scroll = {line_index, *it_seg};
free(line);
free(it->buffer);
free(it);
return;
}
}
free(line);
} while (number > 0);
free(it->buffer);
free(it);
}
@@ -168,10 +171,10 @@ void scroll_down(Editor *editor, uint32_t number) {
char *line = next_line(it, nullptr);
if (!line) {
free(scroll_queue);
free(it->buffer);
free(it);
return;
}
free(line);
line_index++;
}
continue;
@@ -200,8 +203,8 @@ void scroll_down(Editor *editor, uint32_t number) {
visual_seen++;
if (visual_seen >= number + max_visual_lines) {
editor->scroll = scroll_queue[q_head];
free(line);
free(scroll_queue);
free(it->buffer);
free(it);
return;
}
@@ -223,13 +226,13 @@ void scroll_down(Editor *editor, uint32_t number) {
if (line_len == 0)
break;
}
free(line);
line_index++;
}
if (q_size > 0) {
uint32_t advance = (q_size > number) ? number : (q_size - 1);
editor->scroll = scroll_queue[(q_head + advance) % max_visual_lines];
}
free(it->buffer);
free(it);
free(scroll_queue);
}
@@ -267,7 +270,6 @@ void ensure_cursor(Editor *editor) {
char *line = next_line(it, nullptr);
if (!line)
break;
free(line);
line_index++;
}
continue;
@@ -302,7 +304,7 @@ void ensure_cursor(Editor *editor) {
if (line_index == editor->cursor.row) {
if (editor->cursor.col >= offset &&
editor->cursor.col <= offset + advance) {
free(line);
free(it->buffer);
free(it);
return;
}
@@ -313,7 +315,6 @@ void ensure_cursor(Editor *editor) {
if (line_len == 0)
break;
}
free(line);
line_index++;
}
uint32_t last_real_row = last_visible.row;
@@ -325,6 +326,7 @@ void ensure_cursor(Editor *editor) {
editor->cursor.row = last_visible.row;
editor->cursor.col = last_visible.row == last_real_row ? last_visible.col : 0;
editor->cursor_preffered = UINT32_MAX;
free(it->buffer);
free(it);
}
@@ -340,6 +342,7 @@ void ensure_scroll(Editor *editor) {
uint32_t len;
char *line = next_line(it, &len);
if (!line) {
free(it->buffer);
free(it);
return;
}
@@ -359,7 +362,7 @@ void ensure_scroll(Editor *editor) {
if (editor->cursor.col > old_offset && editor->cursor.col <= offset) {
editor->scroll.row = editor->cursor.row;
editor->scroll.col = old_offset;
free(line);
free(it->buffer);
free(it);
return;
}
@@ -368,7 +371,7 @@ void ensure_scroll(Editor *editor) {
cols += width;
offset += inc;
}
free(line);
free(it->buffer);
free(it);
editor->scroll.row = editor->cursor.row;
editor->scroll.col = (editor->cursor.col == 0) ? 0 : old_offset;
@@ -403,7 +406,6 @@ void ensure_scroll(Editor *editor) {
char *line = next_line(it, nullptr);
if (!line)
break;
free(line);
line_index++;
}
continue;
@@ -453,8 +455,8 @@ void ensure_scroll(Editor *editor) {
cursor_found = true;
if (cursor_found) {
editor->scroll = scroll_queue[q_head];
free(line);
free(scroll_queue);
free(it->buffer);
free(it);
return;
}
@@ -464,9 +466,9 @@ void ensure_scroll(Editor *editor) {
break;
}
line_index++;
free(line);
}
free(scroll_queue);
free(it->buffer);
free(it);
}
}

58
src/knot.cc
View File

@@ -471,6 +471,12 @@ LineIterator *begin_l_iter(Knot *root, uint32_t start_line) {
return nullptr;
it->top = 0;
it->node = nullptr;
it->capacity = 128;
it->buffer = (char *)malloc(it->capacity);
if (!it->buffer) {
free(it);
return nullptr;
}
if (start_line == 0) {
it->offset = 0;
while (root->left) {
@@ -499,6 +505,7 @@ LineIterator *begin_l_iter(Knot *root, uint32_t start_line) {
}
}
if (!it->node) {
free(it->buffer);
free(it);
return nullptr;
}
@@ -516,7 +523,7 @@ LineIterator *begin_l_iter(Knot *root, uint32_t start_line) {
}
}
}
free(next_line(it, nullptr));
next_line(it, nullptr);
return it;
}
@@ -559,11 +566,7 @@ static void str_reverse(char *begin, char *end) {
char *prev_line(LineIterator *it, uint32_t *out_len) {
if (!it || !it->node)
return nullptr;
size_t capacity = 128;
size_t len = 0;
char *buffer = (char *)malloc(capacity);
if (!buffer)
return nullptr;
while (it->node) {
if (it->offset == 0) {
iter_retreat_leaf(it);
@@ -578,25 +581,22 @@ char *prev_line(LineIterator *it, uint32_t *out_len) {
break;
}
}
if (len + 1 >= capacity) {
capacity *= 2;
char *new_buf = (char *)realloc(buffer, capacity);
if (!new_buf) {
free(buffer);
if (len + 1 >= it->capacity) {
it->capacity *= 2;
char *new_buf = (char *)realloc(it->buffer, it->capacity);
if (!new_buf)
return nullptr;
}
buffer = new_buf;
it->buffer = new_buf;
}
buffer[len++] = c;
it->buffer[len++] = c;
}
if (len > 0) {
buffer[len] = '\0';
str_reverse(buffer, buffer + len - 1);
it->buffer[len] = '\0';
str_reverse(it->buffer, it->buffer + len - 1);
if (out_len)
*out_len = len;
return buffer;
return it->buffer;
}
free(buffer);
return nullptr;
}
@@ -630,11 +630,7 @@ static inline void iter_advance_leaf(LineIterator *it) {
char *next_line(LineIterator *it, uint32_t *out_len) {
if (!it || !it->node)
return nullptr;
size_t capacity = 128;
size_t len = 0;
char *buffer = (char *)malloc(capacity);
if (!buffer)
return nullptr;
while (it->node) {
if (it->offset >= it->node->char_count) {
iter_advance_leaf(it);
@@ -652,32 +648,30 @@ char *next_line(LineIterator *it, uint32_t *out_len) {
} else {
chunk_len = end - start;
}
if (len + chunk_len + 1 > capacity) {
capacity = (capacity * 2) + chunk_len;
char *new_buf = (char *)realloc(buffer, capacity);
if (len + chunk_len + 1 > it->capacity) {
it->capacity = (it->capacity * 2) + chunk_len;
char *new_buf = (char *)realloc(it->buffer, it->capacity);
if (!new_buf) {
free(buffer);
return nullptr;
}
buffer = new_buf;
it->buffer = new_buf;
}
memcpy(buffer + len, start, chunk_len);
memcpy(it->buffer + len, start, chunk_len);
len += chunk_len;
it->offset += chunk_len;
if (found_newline) {
buffer[len] = '\0';
it->buffer[len] = '\0';
if (out_len)
*out_len = len;
return buffer;
return it->buffer;
}
}
if (len > 0) {
buffer[len] = '\0';
it->buffer[len] = '\0';
if (out_len)
*out_len = len;
return buffer;
return it->buffer;
}
free(buffer);
return nullptr;
}