From 5c8326ae953eee1cd36711a7769cff624f312864 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Juan=20Manuel=20Tom=C3=A1s?= <jtomas1815@gmail.com>
Date: Fri, 10 Jul 2020 21:24:20 -0300
Subject: Implement file reading using read syscall

---
 buffer.cpp | 22 ++++++++++++++--------
 jet.cpp    |  4 +++-
 2 files changed, 17 insertions(+), 9 deletions(-)

diff --git a/buffer.cpp b/buffer.cpp
index d1762d0..ff5ae60 100644
--- a/buffer.cpp
+++ b/buffer.cpp
@@ -4,17 +4,23 @@ 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) {
+	void write_file(const char *file) {
 		FILE *f = fopen(file, "w+");
 		for (Point p(storage, 0); !p.at_end(); p++) {
 			fputc(p.element(), f);
diff --git a/jet.cpp b/jet.cpp
index c4e997c..1a2e9c9 100644
--- a/jet.cpp
+++ b/jet.cpp
@@ -3,6 +3,8 @@
 #include <string.h>
 
 #include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
 #include <sys/socket.h>
 #include <netinet/ip.h>
 #include <arpa/inet.h>
@@ -48,7 +50,7 @@ void parse_command(char *command, Client *client) {
 
 int main() {
 	Buffer scratch("scratch");
-	scratch.read("LICENSE");
+	scratch.read_file("LICENSE");
 
 	int listener = create_listener();
 
-- 
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