1 files changed, 107 insertions, 20 deletions

diff --git a/editor_piece.c b/editor_piece.c
index 817dda2..572da7e 100644
--- a/editor_piece.c
+++ b/editor_piece.c
@@ -1,76 +1,163 @@
+#include <sys/mman.h>
+
 #include <stddef.h>
 #include <assert.h>
+#include "mem.h"
 #include "slice.h"
+#include "vector.h"
 
-struct ed_buf;
+#define SEGMENT_LEN 8192
 
-void eb_init(struct ed_buf **eb) {
-	assert("TODO" == 0);
+DEFINE_VECTOR(Vec_voidp, void *);
+
+struct add_buf {
+	Vec_voidp *segments;
+	size_t size;
+};
+
+static void ab_init(struct add_buf **ab)
+{
+	struct add_buf *nab = mem_malloc(sizeof *nab);
+
+	Vec_voidp_init(&nab->segments);
+	nab->size = 0;
+	*ab = nab;
 }
 
-void eb_free(struct ed_buf *eb) {
-	assert("TODO" == 0);
+static void ab_free(struct add_buf *ab)
+{
+	size_t len = Vec_voidp_len(ab->segments);
+
+	for (size_t i = 0; i < len; i++)
+		munmap(Vec_voidp_get(ab->segments, i), SEGMENT_LEN);
+
+	Vec_voidp_free(ab->segments);
+	mem_free(ab);
+}
+
+inline static char *new_segment()
+{
+	return mmap(NULL, SEGMENT_LEN, PROT_READ | PROT_WRITE,
+		    MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+}
+
+static void ab_push(struct add_buf *ab, char ch)
+{
+	if (++ab->size > Vec_voidp_len(ab->segments) * SEGMENT_LEN)
+		Vec_voidp_push(ab->segments, new_segment());
+
+	char *seg = (char *)Vec_voidp_get(ab->segments, ab->size / SEGMENT_LEN);
+	seg[ab->size % SEGMENT_LEN] = ch;
+}
+
+struct piece {
+	size_t is_origin:1;
+
+	/* padding */
+
+	size_t start_index;
+	size_t length;
+};
+
+struct ed_buf {
+	Vec_voidp *ptab;
+	const char *origin;
+	struct add_buf *add;
+};
+
+void eb_init(struct ed_buf **eb)
+{
+	Vec_voidp *ptab;
+	Vec_voidp_init(&ptab);
+
+	struct ed_buf *neb = mem_malloc(sizeof *neb);
+	neb->ptab = ptab;
+	neb->origin = NULL;
+	ab_init(&neb->add);
+
+	*eb = neb;
 }
 
-void eb_insert(struct ed_buf *eb, int ch) {
+void eb_free(struct ed_buf *eb)
+{
+	Vec_voidp_free(eb->ptab);
+	ab_free(eb->add);
+	
+	free(eb);
+}
+
+void eb_insert(struct ed_buf *eb, int ch)
+{
 	assert("TODO" == 0);
 }
 
-void eb_backspace(struct ed_buf *eb) {
+void eb_backspace(struct ed_buf *eb)
+{
 	assert("TODO" == 0);
 }
 
-void eb_newline(struct ed_buf *eb) {
+void eb_newline(struct ed_buf *eb)
+{
 	assert("TODO" == 0);
 }
 
 
 /* set cursor */
-void eb_set_cur_prev_line(struct ed_buf *eb) {
+void eb_set_cur_prev_line(struct ed_buf *eb)
+{
 	assert("TODO" == 0);
 }
 
-void eb_set_cur_backward(struct ed_buf *eb) {
+void eb_set_cur_backward(struct ed_buf *eb)
+{
 	assert("TODO" == 0);
 }
 
-void eb_set_cur_next_line(struct ed_buf *eb) {
+void eb_set_cur_next_line(struct ed_buf *eb)
+{
 	assert("TODO" == 0);
 }
 
-void eb_set_cur_forward(struct ed_buf *eb) {
+void eb_set_cur_forward(struct ed_buf *eb)
+{
 	assert("TODO" == 0);
 }
 
 
 /* get */
-void eb_get_line_slice(const struct ed_buf *eb, size_t pos, struct slice *sl) {
+void eb_get_line_slice(const struct ed_buf *eb, size_t pos, struct slice *sl)
+{
 	assert("TODO" == 0);
 }
 
-size_t eb_get_cur_col(const struct ed_buf *eb) {
+size_t eb_get_cur_col(const struct ed_buf *eb)
+{
 	assert("TODO" == 0);
 }
 
-size_t eb_get_cur_row(const struct ed_buf *eb) {
+size_t eb_get_cur_row(const struct ed_buf *eb)
+{
 	assert("TODO" == 0);
 }
 
-size_t eb_get_line_num(const struct ed_buf *eb) {
+size_t eb_get_line_num(const struct ed_buf *eb)
+{
 	assert("TODO" == 0);
 }
 
 
 /* io */
-void eb_bind(struct ed_buf *eb, const char *path) {
+void eb_bind(struct ed_buf *eb, const char *path)
+{
 	assert("TODO" == 0);
 }
 
-void eb_load_file(struct ed_buf *eb) {
+void eb_load_file(struct ed_buf *eb)
+{
 	assert("TODO" == 0);
 }
 
-void eb_save_file(struct ed_buf *eb) {
+void eb_save_file(struct ed_buf *eb)
+{
 	assert("TODO" == 0);
 }
-