From 92c0b5ba962ebe888a0db94a8b3cad3c63dee1ff Mon Sep 17 00:00:00 2001
From: "Gu://em_" <guillem.george@epita.fr>
Date: Thu, 8 Jan 2026 14:40:37 +0100
Subject: [PATCH] feat: IOB structures and iob_init()

---
 src/io_backend/io_backend.c | 34 +++++++++++++++++++++++++++
 src/io_backend/io_backend.h | 46 +++++++++++++++++++++++++++++++++++++
 2 files changed, 80 insertions(+)

diff --git a/src/io_backend/io_backend.c b/src/io_backend/io_backend.c
index e69de29..ee6b09b 100644
--- a/src/io_backend/io_backend.c
+++ b/src/io_backend/io_backend.c
@@ -0,0 +1,34 @@
+#include "io_backend.h"
+
+#include <stdio.h>
+
+static struct iob_context context;
+static FILE *input;
+
+int iob_init(struct iob_context *ctx)
+{
+    context = *ctx;
+
+    switch (context.mode)
+    {
+    IOB_MODE_STDIN:
+        input = stdin;
+        return 0;
+
+    IOB_MODE_SCRIPT:
+        if (context.args == NULL)
+            return -2;
+        input = fopen(context.args, "r");
+        if (input == NULL)
+            return -4;
+
+    IOB_MODE_CMD:
+        if (context.args != NULL)
+            return -2;
+        else
+            return 0;
+
+    default:
+        return -1;
+    }
+}
diff --git a/src/io_backend/io_backend.h b/src/io_backend/io_backend.h
index e69de29..34d85f3 100644
--- a/src/io_backend/io_backend.h
+++ b/src/io_backend/io_backend.h
@@ -0,0 +1,46 @@
+#ifndef IO_BACKEND_H
+#define IO_BACKEND_H
+
+#include <sys/types.h>
+
+enum iob_mode {
+    IOB_MODE_NULL = 0,
+    IOB_MODE_STDIN,
+    IOB_MODE_SCRIPT,
+    IOB_MODE_CMD
+};
+
+/* @struct iob_context
+ * @var mode
+ * @var args contains
+ *        the script name when mode is set to IOB_SCRIPT,
+ *        the command to execute when mode is set to IOB_CMD,
+ */
+struct iob_context {
+    enum iob_mode mode;
+    char* args;
+};
+
+/*
+ * @brief Initializes the IO Backend module
+ * 
+ * @param context contains the input mode and the args
+ * @return 0 on success, the corresponding error code otherwise
+ */
+int iob_init(struct iob_context *context);
+
+/* TODO
+ *
+ *
+ *
+ */
+void iob_close();
+
+/*i TODO
+ *
+ *
+ *
+ */
+ssize_t stream_read(char** stream);
+
+#endif /* ! IO_BACKEND_H */