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Modularize insertion/deletion

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This commit is contained in:
Syed Daanish
2025-12-11 18:00:17 +00:00
parent 4e25b28bbe
commit 17e8521f6a
7 changed files with 123 additions and 113 deletions
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41
src/knot.cc
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@@ -391,25 +391,42 @@ static uint32_t find_nth_newline_offset(Knot *node, uint32_t n) {
}
}
uint32_t byte_to_line(Knot *node, uint32_t offset) {
if (!node)
uint32_t byte_to_line(Knot *node, uint32_t offset, uint32_t *out_col) {
if (!node) {
if (out_col)
*out_col = 0;
return 0;
if (offset >= node->char_count)
}
if (offset >= node->char_count) {
if (out_col)
*out_col = 0;
return node->line_count;
}
if (node->depth == 0) {
uint32_t lines_before = 0;
uint32_t limit = (offset < node->char_count) ? offset : node->char_count;
for (uint32_t i = 0; i < limit; i++)
if (node->data[i] == '\n')
lines_before++;
return lines_before;
uint32_t line = 0;
uint32_t col = 0;
for (uint32_t i = 0; i < offset; i++) {
if (node->data[i] == '\n') {
line++;
col = 0;
} else {
col++;
}
}
if (out_col)
*out_col = col;
return line;
}
uint32_t left_chars = node->left ? node->left->char_count : 0;
if (offset < left_chars) {
return byte_to_line(node->left, offset);
return byte_to_line(node->left, offset, out_col);
} else {
uint32_t left_lines = node->left ? node->left->line_count : 0;
return left_lines + byte_to_line(node->right, offset - left_chars);
uint32_t sub_col = 0;
uint32_t line = (node->left ? node->left->line_count : 0) +
byte_to_line(node->right, offset - left_chars, &sub_col);
if (out_col)
*out_col = sub_col;
return line;
}
}