Command aliasing

assets/init.dcf

@@ -12,3 +12,6 @@ bind e accept;
 bind enter accept;
 bind q cancel;
 bind esc quit;
+
+alias test "echo \"test\"";
+bind p test;

src/console/cmd/cmdalias.h

@@ -0,0 +1,53 @@
+/**
+ * Copyright (c) 2025 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include "console/console.h"
+#include "input/input.h"
+#include "util/string.h"
+
+void cmdAlias(const consolecmdexec_t *exec) {
+  if(exec->argc < 1) {
+    consolePrint("Expected 1 argument: <name> <command>");
+    return;
+  }
+  
+  if(exec->argc == 1 || strlen(exec->argv[1]) == 0) {
+    // Removing the alias.
+    for(uint32_t i = 0; i < CONSOLE.aliasCount; i++) {
+      if(stringCompare(CONSOLE.aliases[i].alias, exec->argv[0]) != 0) {
+        continue;
+      }
+
+      // Move all the later aliases down one.
+      if(CONSOLE.aliasCount - i - 1 > 0) {
+        memoryMove(
+          &CONSOLE.aliases[i],
+          &CONSOLE.aliases[i + 1],
+          (CONSOLE.aliasCount - i - 1) * sizeof(consolealias_t)
+        );
+      }
+      CONSOLE.aliasCount--;
+      return;
+    }
+
+    // Alias not found.
+    return;
+  }
+  
+  // Add alias
+  if(CONSOLE.aliasCount >= CONSOLE_ALIAS_MAX) {
+    consolePrint("Max aliases reached");
+    return;
+  }
+
+  // Create alias
+  consolealias_t *alias = &CONSOLE.aliases[CONSOLE.aliasCount++];
+  stringCopy(alias->alias, exec->argv[0], CONSOLE_LINE_MAX);
+  stringCopy(alias->command, exec->argv[1], CONSOLE_LINE_MAX);
+  consolePrint("Added alias \"%s\" -> \"%s\"", exec->argv[0], exec->argv[1]);
+}

src/console/console.c

@@ -18,6 +18,7 @@
 #include "console/cmd/cmdexec.h"
 #include "console/cmd/cmdbind.h"
 #include "console/cmd/cmdtoggleconsole.h"
+#include "console/cmd/cmdalias.h"
 
 console_t CONSOLE;
 
@@ -32,6 +33,7 @@ void consoleInit() {
   consoleRegCmd("exec", cmdExec);
   consoleRegCmd("bind", cmdBind);
   consoleRegCmd("toggleconsole", cmdToggleConsole);
+  consoleRegCmd("alias", cmdAlias);
 
   #if CONSOLE_POSIX
     threadInit(&CONSOLE.thread, consoleInputThread);
@@ -286,7 +288,27 @@ void consoleExec(const char_t *line) {
             break;
           }
 
-          if(exec->cmd == NULL) {
+          // Variable not found, is there an alias that matches?
+          bool_t aliasFound = false;
+          for(uint32_t k = 0; k < CONSOLE.aliasCount; k++) {
+            consolealias_t *alias = &CONSOLE.aliases[k];
+            if(stringCompare(alias->alias, exec->command) != 0) continue;
+
+            // Matching alias found, we unlock the mutex and recursively call
+            // consoleExec to handle the alias command.
+            #if CONSOLE_POSIX
+              threadMutexUnlock(&CONSOLE.execMutex);
+            #endif
+            consoleExec(alias->command);
+            #if CONSOLE_POSIX
+              threadMutexLock(&CONSOLE.execMutex);
+            #endif
+
+            aliasFound = true;
+            break;
+          }
+
+          if(!aliasFound && exec->cmd == NULL) {
             consolePrint("Command \"%s\" not found", exec->command);
             exec = NULL;
             state = CONSOLE_EXEC_STATE_INITIAL;

src/console/console.h

@@ -8,6 +8,7 @@
 #pragma once
 #include "consolevar.h"
 #include "consolecmd.h"
+#include "consolealias.h"
 
 #if CONSOLE_POSIX
   #include "thread/thread.h"
@@ -43,6 +44,9 @@ typedef struct {
   consolecmdexec_t execBuffer[CONSOLE_EXEC_BUFFER_MAX];
   uint32_t execBufferCount;
 
+  consolealias_t aliases[CONSOLE_ALIAS_MAX];
+  uint32_t aliasCount;
+
   consolecmd_t *cmdGet;
   consolecmd_t *cmdSet;
 

src/console/consolealias.h

@@ -0,0 +1,14 @@
+/**
+ * Copyright (c) 2025 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include "consolecmd.h"
+
+typedef struct {
+  char_t command[CONSOLE_LINE_MAX];
+  char_t alias[CONSOLE_LINE_MAX];
+} consolealias_t;

src/console/consoledefs.h

@@ -15,6 +15,7 @@
 #define CONSOLE_LINE_MAX 256
 #define CONSOLE_HISTORY_MAX 32
 #define CONSOLE_EXEC_BUFFER_MAX 16
+#define CONSOLE_ALIAS_MAX 32
 
 #define CONSOLE_VAR_NAME_MAX 32
 #define CONSOLE_VAR_VALUE_MAX 128