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/*
casm - Simple, portable assembler
Copyright (C) 2003-2015 Ian Cowburn (ianc@noddybox.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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