From 77e8708934c5c792b1435fa11dfe3c0a6f636a8c Mon Sep 17 00:00:00 2001
From: Ian C <ianc@noddybox.co.uk>
Date: Mon, 7 Mar 2016 15:00:21 +0000
Subject: Updated README and copied latest version in.

---
 src/alias.c | 146 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 146 insertions(+)
 create mode 100644 src/alias.c

(limited to 'src/alias.c')

diff --git a/src/alias.c b/src/alias.c
new file mode 100644
index 0000000..01017bd
--- /dev/null
+++ b/src/alias.c
@@ -0,0 +1,146 @@
+/*
+
+    casm - Simple, portable assembler
+
+    Copyright (C) 2003-2015  Ian Cowburn (ianc@noddybox.demon.co.uk)
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+    -------------------------------------------------------------------------
+
+    Collection for aliases.
+
+*/
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+
+#include "global.h"
+#include "alias.h"
+
+
+/* ---------------------------------------- TYPES
+*/
+
+typedef struct alias
+{
+    char                *command;
+    char                *alias;
+    struct alias        *next;
+} Alias;
+
+
+/* ---------------------------------------- GLOBALS
+*/
+static Alias    *head;
+static Alias    *tail;
+
+
+/* ---------------------------------------- PRIVATE FUNCTIONS INTERFACES
+*/
+static Alias *FindAlias(const char *p)
+{
+    Alias *a = head;
+
+    while(a)
+    {
+        if (CompareString(a->command, p))
+        {
+            return a;
+        }
+
+        a = a->next;
+    }
+
+    return NULL;
+}
+
+
+static void AddAlias(const char *p, const char *r)
+{
+    Alias *a = FindAlias(p);
+
+    if (!a)
+    {
+        a = Malloc(sizeof *a);
+
+        a->command = DupStr(p);
+        a->alias = DupStr(r);
+        a->next = NULL;
+
+        if (tail)
+        {
+            tail->next = a;
+        }
+
+        tail = a;
+
+        if (!head)
+        {
+            head = a;
+        }
+    }
+    else
+    {
+        free(a->alias);
+        a->alias = DupStr(r);
+    }
+}
+
+
+/* ---------------------------------------- INTERFACES
+*/
+
+void AliasClear()
+{
+    while(head)
+    {
+        Alias *a;
+
+        free(head->command);
+        free(head->alias);
+        a = head;
+        head = head->next;
+        free(a);
+    }
+
+    head = NULL;
+    tail = NULL;
+}
+
+
+void AliasCreate(const char *command, const char *alias)
+{
+    AddAlias(command, alias);
+}
+
+
+char *AliasExpand(char *command)
+{
+    Alias *a;
+
+    if ((a = FindAlias(command)))
+    {
+        free(command);
+        command = DupStr(a->alias);
+    }
+
+    return command;
+}
+
+
+/*
+vim: ai sw=4 ts=8 expandtab
+*/
-- 
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