First commit with project structure

5 files changed, 162 insertions, 0 deletions

diff --git a/src/buffer.c b/src/buffer.c
new file mode 100644
index 0000000..2fbfe72
--- /dev/null
+++ b/src/buffer.c
@@ -0,0 +1,46 @@
+#include "buffer.h"
+#include <string.h>
+#include <malloc.h>
+
+bool init_growable_buffer(growable_buffer *buffer) {
+    buffer->size = GROW_SIZE;
+    buffer->used = 0;
+    buffer->content = malloc(GROW_SIZE);
+    if (!buffer->content) {
+        return false;
+    }
+    return true;
+}
+
+bool grow_growable_buffer(growable_buffer *buffer, size_t at_least) {
+    size_t new_size = ((at_least % GROW_SIZE) + 1 ) * GROW_SIZE;
+    if (new_size < buffer->size){
+        buffer->content = realloc(buffer->content, new_size);
+        if (!buffer->content){
+            return false;
+        }
+        buffer->size = new_size;
+        return true;
+    }
+}
+
+void free_growable_buffer(growable_buffer *buffer) {
+    free(buffer->content);
+    buffer->content = NULL;
+    buffer->used = 0;
+    buffer->size = 0;
+}
+
+
+
+bool init_fixed_buffer(fixed_buffer *buffer, char *orig) {
+    buffer->content = orig;
+    buffer->size = strlen(orig);
+    return buffer->content != NULL;
+}
+
+void free_fixed_buffer(fixed_buffer *buffer) {
+    free(buffer->content);
+    buffer->content = NULL;
+    buffer->size = 0;
+}
diff --git a/src/buffer.h b/src/buffer.h
new file mode 100644
index 0000000..35f2bdf
--- /dev/null
+++ b/src/buffer.h
@@ -0,0 +1,27 @@
+#ifndef BUFFER_H
+#define BUFFER_H
+#include <stdbool.h>
+#include <stddef.h>
+
+#define GROW_SIZE 10
+
+typedef struct {
+    char *content;
+    size_t used;
+    size_t size;
+} growable_buffer;
+
+bool init_growable_buffer(growable_buffer *buffer);
+bool grow_growable_buffer(growable_buffer *buffer, size_t at_least);
+void free_growable_buffer(growable_buffer *buffer);
+
+
+typedef struct {
+    char *content;
+    size_t size;
+} fixed_buffer;
+
+bool init_fixed_buffer(fixed_buffer *buffer, char *orig);
+void free_fixed_buffer(fixed_buffer *buffer);
+
+#endif // BUFFER_H
diff --git a/src/main.c b/src/main.c
new file mode 100644
index 0000000..3cc9dc4
--- /dev/null
+++ b/src/main.c
@@ -0,0 +1,3 @@
+int main(int argc, char *argv[]){
+    return 0;
+}
diff --git a/src/piece-table.c b/src/piece-table.c
new file mode 100644
index 0000000..490950b
--- /dev/null
+++ b/src/piece-table.c
@@ -0,0 +1,54 @@
+#include "piece-table.h"
+
+static piece *make_piece() {
+    return malloc(sizeof(piece));
+}
+
+static piece *make_sentinel() {
+    piece *p = make_piece();
+    p->length = 0;
+    p->next   = NULL;
+    p->prev   = NULL;
+    p->start  = NULL;
+    return p;
+}
+
+bool init_piece_table(piece_table *pt, char *orig) {
+    piece *pc, *sentinel;
+
+    init_growable_buffer(&pt->add);
+    init_fixed_buffer(&pt->orig, orig);
+
+    pt->length = pt->orig.size;
+
+    pc = make_piece();
+    if(pc == NULL){
+        return false;
+    }
+    sentinel = make_sentinel();
+    if(sentinel == NULL){
+        return false;
+    }
+    pc->start = pt->orig.content;
+    pc->length = pt->orig.size;
+    pc->prev = sentinel;
+    pc->next = sentinel;
+
+    pt->cached_offset = 0;
+    pt->cached = pc;
+    return true;
+}
+
+void free_piece_table(piece_table *pt) {
+    free_growable_buffer(&pt->add);
+    free_fixed_buffer(&pt->orig);
+    free_piece_list(pt->sentinel);
+    pt->sentinel = NULL;
+    pt->cached = NULL;
+    pt->cached_offset = 0;
+    pt->length = 0;
+}
+
+void free_piece_list(piece *pt) {
+    // TODO
+}
diff --git a/src/piece-table.h b/src/piece-table.h
new file mode 100644
index 0000000..94ab072
--- /dev/null
+++ b/src/piece-table.h
@@ -0,0 +1,32 @@
+#ifndef PIECE_TABLE_H
+#define PIECE_TABLE_H
+
+#include <malloc.h>
+#include <stddef.h>
+#include "buffer.h"
+
+struct piece {
+    char *start;
+    size_t length;
+    struct piece *next;
+    struct piece *prev;
+};
+
+typedef struct piece piece;
+
+typedef struct {
+    fixed_buffer orig;
+    growable_buffer add;
+    piece *sentinel;
+    size_t length;
+
+    piece *cached;
+    size_t cached_offset;
+} piece_table;
+
+bool init_piece_table(piece_table *pt, char *orig);
+void free_piece_table(piece_table *pt);
+
+void free_piece_list(piece *pt);
+
+#endif // PIECE_TABLE_H