From 57ce8d531ee96605bd0f0b7e86b3564157bdf5b8 Mon Sep 17 00:00:00 2001
From: Lukas Jiriste <ljiriste@student.42prague.com>
Date: Sat, 20 Jan 2024 17:14:18 +0100
Subject: [PATCH 1/1] Create project, implement server

---
 .gitignore   |  3 +++
 .gitmodules  |  3 +++
 Libft        |  1 +
 Makefile     | 53 ++++++++++++++++++++++++++++++++++++
 src/server.c | 76 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 136 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 .gitmodules
 create mode 160000 Libft
 create mode 100644 Makefile
 create mode 100644 src/server.c

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..1f84a6b
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+server
+client
+*.o
diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..626d139
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "Libft"]
+	path = Libft
+	url = git://ljiriste.work/Libft
diff --git a/Libft b/Libft
new file mode 160000
index 0000000..a4212a0
--- /dev/null
+++ b/Libft
@@ -0,0 +1 @@
+Subproject commit a4212a0f1de2cf7553f3cde8931c90fe006f3cd4
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..82bb9d5
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,53 @@
+CC := gcc
+#CFLAGS = -std=c99 -Wall -Wextra -Werror -Wpedantic
+CFLAGS = -Wall -Wextra -Werror -Wpedantic
+
+RM := rm -f
+
+SUBPROJECTS := Libft
+
+INCDIR := inc
+SUBINCDIR := $(addsuffix /inc, $(SUBPROJECTS));
+INCLUDE := $(addprefix -I, $(INCDIR) $(SUBINCDIR))
+
+SRCDIR := src
+
+SOURCES :=	main.c			\
+
+SOURCES := $(addprefix $(SRCDIR)/, $(SOURCES))
+
+OBJECTS := $(SOURCES:.c=.o)
+
+NAME := server
+
+all : $(NAME)
+
+debug : CFLAGS += -g
+debug : $(NAME)
+
+$(NAME) : $(OBJECTS) Libft/libft.a
+	$(CC) $(CFLAGS) -o $@ $^
+
+Libft/libft.a :
+ifneq (,$(findstring debug, $(MAKECMDGOALS)))
+	$(MAKE) -C Libft debug
+else
+	$(MAKE) -C Libft
+endif
+
+%.o : %.c | $(SUBINCDIR)
+	$(CC) $(CFLAGS) -o $@ -c $< $(INCLUDE)
+
+%/inc :
+	git submodule update --init $($@%/inc=%)
+
+clean :
+	$(RM) $(OBJECTS)
+	$(foreach proj, $(SUBPROJECTS), $(MAKE) -C $(proj) clean)
+
+fclean : clean
+	$(RM) $(NAME)
+	$(foreach proj, $(SUBPROJECTS), $(MAKE) -C $(proj) fclean)
+
+re : fclean
+	$(MAKE) all
diff --git a/src/server.c b/src/server.c
new file mode 100644
index 0000000..98e9ba5
--- /dev/null
+++ b/src/server.c
@@ -0,0 +1,76 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   main.c                                             :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: ljiriste <marvin@42.fr>                    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/01/20 15:12:04 by ljiriste          #+#    #+#             */
+/*   Updated: 2024/01/20 17:06:28 by ljiriste         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "libft.h"
+#include <limits.h>
+#include <unistd.h>
+#include <signal.h>
+
+typedef struct s_transfer
+{
+	t_vec	string;
+	int		bits_written;
+	int		transfer_done;
+}			t_transfer;
+
+t_transfer	g_transfer;
+
+void	signal_bit_decoder(int signum)
+{
+	const char	null_char = 0;
+
+	if (g_transfer.bits_written == 0)
+		ft_vec_append(&g_transfer.string, &null_char);
+	if (signum == SIGUSR1)
+		*(char *)ft_vec_access(&g_transfer.string, g_transfer.string.size - 1) |= 1 << g_transfer.bits_written;
+	++g_transfer.bits_written;
+	g_transfer.transfer_done = (g_transfer.bits_written == CHAR_BIT && !(*(char *)ft_vec_access(&g_transfer.string, g_transfer.string.size - 1)));
+	g_transfer.bits_written %= CHAR_BIT;
+	return ;
+}
+
+void	setup_handler(void)
+{
+	struct sigaction	sa;
+
+	ft_memset(&sa, 0, sizeof(sa));
+	sigemptyset(&sa.sa_mask);
+	sigaddset(&sa.sa_mask, SIGUSR1);
+	sigaddset(&sa.sa_mask, SIGUSR2);
+	sa.sa_handler = signal_bit_decoder;
+	sigaction(SIGUSR1, &sa, NULL);
+	sigaction(SIGUSR2, &sa, NULL);
+	return ;
+}
+
+int	main(void)
+{
+	ft_vec_init(&g_transfer.string, sizeof(char));
+	setup_handler();
+	ft_printf("Hello, I'm a minitalk server.\n"
+			"You can contact me through my PID: %i.\n"
+			"For legibility I'll leave one empty line "
+			"after this initial message.\n"
+			"I'll also append newline to every message recieved.\n"
+			"I'm starting to print the messages now:\n\n", getpid());
+	while (1)
+	{
+		pause();
+		if (g_transfer.transfer_done)
+		{
+			ft_printf(g_transfer.string.vec);
+			ft_vec_forget_range(&g_transfer.string, g_transfer.string.size, 0);
+			g_transfer.transfer_done = 0;
+		}
+	}
+	return (0);
+}
-- 
2.30.2