From 74fe14660a29586bc91ce3c75e61d41ce76ef6a5 Mon Sep 17 00:00:00 2001
From: Polonkai Gergely <polesz@w00d5t0ck.info>
Date: Tue, 13 Mar 2012 02:22:22 +0100
Subject: [PATCH] Added a basic (non-working) command interpreter.

Signed-off-by: Polonkai Gergely <polesz@w00d5t0ck.info>
---
 src/Makefile.am   |  2 +-
 src/interpreter.c | 73 +++++++++++++++++++++++++++++++++++++++++++++++
 src/interpreter.h | 10 +++++++
 src/main.c        |  2 ++
 src/networking.c  |  4 +--
 5 files changed, 88 insertions(+), 3 deletions(-)
 create mode 100644 src/interpreter.c
 create mode 100644 src/interpreter.h

diff --git a/src/Makefile.am b/src/Makefile.am
index d957249..1cc5b09 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -1,5 +1,5 @@
 bin_PROGRAMS = wmud
 AM_CFLAGS = $(MEMCACHED_CFLAGS) $(GLIB_CFLAGS) $(GIO_CFLAGS) $(GTHREAD_CFLAGS) $(SQLITE3_CFLAGS)
 
-wmud_SOURCES = main.c networking.c
+wmud_SOURCES = main.c networking.c interpreter.c
 wmud_LDADD = $(MEMCACHED_LIBS) $(GLIB_LIBS) $(GIO_LIBS) $(GTHREAD_LIBS) $(SQLITE3_LIBS)
diff --git a/src/interpreter.c b/src/interpreter.c
new file mode 100644
index 0000000..d52125d
--- /dev/null
+++ b/src/interpreter.c
@@ -0,0 +1,73 @@
+#include <glib.h>
+#include <gio/gio.h>
+#include <string.h>
+
+#include "networking.h"
+
+static void
+command_part_print(GString *data, gpointer user_data)
+{
+	g_print("Part: %s\n", data->str);
+}
+
+void
+wmud_interpret_game_command(wmudClient *client)
+{
+	GSList *command_parts = NULL;
+	gchar *a,
+	      *last_start = NULL;
+	gboolean in_string = FALSE;
+	gchar string_delim = 0;
+	gboolean prev_space = TRUE;
+
+	g_print("Interpreting '%s' as a client command\n", client->buffer->str);
+
+	for (a = client->buffer->str; (a - client->buffer->str) < client->buffer->len + 1; a++)
+	{
+		if ((!g_ascii_isspace(*a) && *a) || in_string)
+		{
+			if (prev_space)
+			{
+				last_start = a;
+				g_print("New token starts here: %s\n", a);
+			}
+
+			prev_space = FALSE;
+		}
+
+		if ((!in_string && ((*a == '\'') || (*a == '"'))) || (in_string && (*a == string_delim)))
+		{
+			g_print("String %s\n", (in_string) ? "ended" : "started");
+			in_string = !in_string;
+			if (!in_string)
+				string_delim = 0;
+			prev_space = FALSE;
+			continue;
+		}
+
+		if (in_string)
+			continue;
+
+		if (g_ascii_isspace(*a) || !*a)
+		{
+			g_print("Space found.\n");
+			if (!prev_space)
+			{
+				GString *token = g_string_new_len(last_start, a - last_start);
+				command_parts = g_slist_prepend(command_parts, token);
+				g_print("Found new token, %d long\n", a - last_start);
+			}
+			prev_space = TRUE;
+		}
+	}
+
+	command_parts = g_slist_reverse(command_parts);
+	g_slist_foreach(command_parts, (GFunc)command_part_print, NULL);
+}
+
+gboolean
+wmud_interpreter_init(void)
+{
+	return TRUE;
+}
+
diff --git a/src/interpreter.h b/src/interpreter.h
new file mode 100644
index 0000000..9bb9cd8
--- /dev/null
+++ b/src/interpreter.h
@@ -0,0 +1,10 @@
+#ifndef __WMUD_INTERPRETER_H__
+# define __WMUD_INTERPRETER_H__
+
+#include "networking.h"
+
+gboolean wmud_interpreter_init(void);
+void wmud_interpret_game_command(wmudClient *client);
+
+#endif /* __WMUD_INTERPRETER_H__ */
+
diff --git a/src/main.c b/src/main.c
index 7f5e69b..f63247b 100644
--- a/src/main.c
+++ b/src/main.c
@@ -6,6 +6,7 @@
 
 #include "main.h"
 #include "networking.h"
+#include "interpreter.h"
 
 #define MAX_RECV_LEN 1024
 
@@ -70,6 +71,7 @@ main(int argc, char **argv)
 
 	game_listener = g_socket_listener_new();
 
+	wmud_interpreter_init();
 	wmud_networking_init(4000);
 
 	g_print("Startup finished\n");
diff --git a/src/networking.c b/src/networking.c
index 43b0979..30f6a46 100644
--- a/src/networking.c
+++ b/src/networking.c
@@ -4,6 +4,7 @@
 
 #include "main.h"
 #include "networking.h"
+#include "interpreter.h"
 
 #define MAX_RECV_LEN 1024
 
@@ -74,8 +75,7 @@ client_callback(GSocket *client, GIOCondition condition, wmudClient *client_data
 					buf2 = n;
 				}
 
-				g_print("Will process input '%s'\n", client_data->buffer->str);
-				/* TODO: interpret command before erasing */
+				wmud_interpret_game_command(client_data);
 				g_string_erase(client_data->buffer, 0, -1);
 
 				for (; ((*buf2 == '\r') || (*buf2 == '\n')) && *buf2; buf2++);