Merge pull request #7 from jmtomas/6

6

1 files changed, 21 insertions, 12 deletions

diff --git a/buffer.cpp b/buffer.cpp
index d1762d0..ba3f87c 100644
--- a/buffer.cpp
+++ b/buffer.cpp
@@ -4,21 +4,30 @@ struct Buffer {
 
 	Buffer(const char *name) : name(name), storage(new Page()) {}
 
-	void read(const char *file) {
-		FILE *f = fopen(file, "r");
-		char c;
-		Point p(storage, 0);
-		while ((c = fgetc(f)) != EOF) {
-			p.push(c);
+	void read_file(const char *pathname) {
+		int file = open(pathname, O_RDONLY);
+		Page *iter = storage;
+		int bytes_read = read(file, iter->elements, PAGE_SIZE);
+		iter->gap_start = bytes_read;
+		iter->element_count = bytes_read;
+		while (bytes_read == PAGE_SIZE) {
+			iter->next = new Page();
+			iter = iter->next;
+			bytes_read = read(file, iter->elements, PAGE_SIZE);
+			iter->gap_start = bytes_read;
+			iter->element_count = bytes_read;
 		}
-		fclose(f);
+		close(file);
 	}
 
-	void write(const char *file) {
-		FILE *f = fopen(file, "w+");
-		for (Point p(storage, 0); !p.at_end(); p++) {
-			fputc(p.element(), f);
+	void write_file(const char *pathname) {
+		int file = open(pathname, O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
+		Page *iter = storage;
+		while (iter) {
+			write(file, iter->elements, iter->gap_start);
+			write(file, iter->elements + iter->gap_end, PAGE_SIZE - iter->gap_end);
+			iter = iter->next;
 		}
-		fclose(f);
+		close(file);
 	}
 };