ivy/frontend/line-ed/buffer.c

#include "buffer.h"
#include "line-ed.h"

const char *line_start(struct line_ed *ed, size_t y)
{
	const char *line = ed->l_buf;

	for (size_t i = 0; i < y; i++) {
		line += strcspn(line, "\n");

		if (*line == '\n') {
			line++;
		}
	}

	return line;
}

size_t line_length(struct line_ed *ed, size_t y)
{
	const char *line = ed->l_buf;

	for (size_t i = 0; i < y; i++) {
		line += strcspn(line, "\n");
		if (*line == '\n') {
			line++;
		}
	}

	if (*line == '\0') {
		return 0;
	}

	size_t len = strcspn(line, "\n");
	if (line[len] == '\n') {
		len++;
	}

	return len;
}