(1) Added current implementations: shell input handling

6 files changed, 161 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..a782c01
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,54 @@
+# Taken from: https://github.com/github/gitignore/blob/master/C.gitignore
+
+# Prerequisites
+*.d
+
+# Object files
+*.o
+*.ko
+*.obj
+*.elf
+
+# Linker output
+*.ilk
+*.map
+*.exp
+
+# Precompiled Headers
+*.gch
+*.pch
+
+# Libraries
+*.lib
+*.a
+*.la
+*.lo
+
+# Shared objects (inc. Windows DLLs)
+*.dll
+*.so
+*.so.*
+*.dylib
+
+# Executables
+*.exe
+*.out
+*.app
+*.i*86
+*.x86_64
+*.hex
+
+# Debug files
+*.dSYM/
+*.su
+*.idb
+*.pdb
+
+# Kernel Module Compile Results
+*.mod*
+*.cmd
+.tmp_versions/
+modules.order
+Module.symvers
+Mkfile.old
+dkms.conf
diff --git a/commandHandler.c b/commandHandler.c
new file mode 100644
index 0000000..9d158f3
--- /dev/null
+++ b/commandHandler.c
@@ -0,0 +1,13 @@
+#include "commandHandler.h"
+
+struct CommandHandler handlers[MAX_HANDLERS];
+
+int handlerCount = 0;
+
+void registerHandler(char *name, F_EXECUTOR executor) {
+	struct CommandHandler newCH;
+	newCH.p_name = name;
+	newCH.p_executor = executor;
+
+	handlers[handlerCount++] = newCH;
+}
diff --git a/commandHandler.h b/commandHandler.h
new file mode 100644
index 0000000..d344abb
--- /dev/null
+++ b/commandHandler.h
@@ -0,0 +1,13 @@
+#ifndef COMMAND_HANDLER_HEADER 
+#define COMMAND_HANDLER_HEADER
+
+#define MAX_HANDLERS 32
+
+typedef void (*F_EXECUTOR)(char *);
+
+struct CommandHandler {
+	char *p_name;
+	F_EXECUTOR p_executor;
+};
+
+#endif
diff --git a/commandRouter.c b/commandRouter.c
new file mode 100644
index 0000000..3d41ddd
--- /dev/null
+++ b/commandRouter.c
@@ -0,0 +1,20 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdbool.h>
+#include <strings.h>
+#include "commandHandler.h"
+
+extern struct CommandHandler handlers[MAX_HANDLERS];
+extern int handlerCount;
+
+bool route(char *command) {
+	command = strtok(command, " ");
+
+	for (int i = 0; i < handlerCount; i++) {
+		if (strcasecmp(handlers[i].p_name, command) == 0) {
+			handlers[i].p_executor(command);
+			return true;
+		}
+	}
+	return false;
+}
diff --git a/defaultCommands.c b/defaultCommands.c
new file mode 100644
index 0000000..cd3442e
--- /dev/null
+++ b/defaultCommands.c
@@ -0,0 +1,26 @@
+#include "commandHandler.h"
+#include <stdio.h>
+
+void help(char *args) {
+	printf("This is the help message");
+}
+
+void about(char *args) {
+	printf("This is the about message");
+}
+
+void version(char *args) {
+	printf("This is the version message");
+}
+
+extern void registerHandler(char *name, F_EXECUTOR executor);
+
+void registerDefaultHandlers() {
+	registerHandler("help", &help);
+	registerHandler("h", &help);
+	registerHandler("?", &help);
+	registerHandler("about", &about);
+	registerHandler("a", &about);
+	registerHandler("version", &version);
+	registerHandler("v", &version);
+}
diff --git a/main.c b/main.c
new file mode 100644
index 0000000..3f2bba6
--- /dev/null
+++ b/main.c
@@ -0,0 +1,35 @@
+#include <bits/posix2_lim.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <limits.h>
+#include <string.h>
+
+#define SHELL_STRING "> "
+
+extern void registerDefaultHandlers();
+void printDefault();
+extern bool route(char *command);
+
+int main() {
+	char buffer[LINE_MAX];
+	buffer[0] = 0;
+
+	registerDefaultHandlers();
+
+	printf("Welcome!\n\n");
+	do {
+		// Removes the Line Feed character at the "end", if it exists
+		char *toChange = strchr(buffer, 0x0A);
+		if (toChange != NULL)
+			toChange[0] = 0;
+
+		if (buffer[0] > 0)
+			if (route(buffer))
+				printf("\n");
+		
+		printf(SHELL_STRING);
+	} while (fgets(buffer, LINE_MAX, stdin));
+
+	return 0;
+}