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cmdAlias.c
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cmdAlias.c
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/*****
** ** Module Header ******************************************************* **
** **
** Modules Revision 3.0 **
** Providing a flexible user environment **
** **
** File: cmdAlias.c **
** First Edition: 1991/10/23 **
** **
** Authors: John Furlan, [email protected] **
** Jens Hamisch, [email protected] **
** R.K. Owen, <[email protected]> or <[email protected]> **
** **
** Description: The Tcl set-alias command **
** **
** Exports: cmdSetAlias **
** **
** Notes: **
** **
** ************************************************************************ **
****/
/** ** Copyright *********************************************************** **
** **
** Copyright 1991-1994 by John L. Furlan. **
** see LICENSE.GPL, which must be provided, for details **
** **
** ************************************************************************ **/
static char Id[] = "@(#)$Id$";
static void *UseId[] = { &UseId, Id };
/** ************************************************************************ **/
/** HEADERS **/
/** ************************************************************************ **/
#include "modules_def.h"
/** ************************************************************************ **/
/** LOCAL DATATYPES **/
/** ************************************************************************ **/
/** not applicable **/
/** ************************************************************************ **/
/** CONSTANTS **/
/** ************************************************************************ **/
/** not applicable **/
/** ************************************************************************ **/
/** MACROS **/
/** ************************************************************************ **/
/** not applicable **/
/** ************************************************************************ **/
/** LOCAL DATA **/
/** ************************************************************************ **/
static char module_name[] = __FILE__;
/** ************************************************************************ **/
/** PROTOTYPES **/
/** ************************************************************************ **/
/** not applicable **/
/*++++
** ** Function-Header ***************************************************** **
** **
** Function: cmdSetAlias **
** **
** Description: Callback function for (re)setting aliases **
** **
** First Edition: 1991/10/23 **
** **
** Parameters: ClientData client_data **
** Tcl_Interp *interp According Tcl interp.**
** int objc Number of arguments **
** Tcl_Obj *objv[] Argument array **
** **
** Result: int TCL_OK Successful completion **
** TCL_ERROR Any error **
** **
** Attached Globals: g_flags These are set up accordingly before **
** this function is called in order to **
** control everything **
** **
** ************************************************************************ **
++++*/
int cmdSetAlias(
ClientData client_data,
Tcl_Interp * interp,
int objc,
Tcl_Obj * CONST84 objv[]
) {
char *arg0, *arg1, *arg2;
/**
** Whatis mode?
**/
if (g_flags & (M_WHATIS | M_HELP))
return (TCL_OK); /** ------- EXIT PROCEDURE -------> **/
/**
** Parameter check. Valid commands are:
**
** unset-alias <alias>
** set-alias <alias> <value>
**/
arg0 = Tcl_GetString(objv[0]);
if ((!strncmp(arg0, "un", 2) && (objc != 2)) ||
(!strncmp(arg0, "set", 3) && (objc != 3))) {
if (OK != ErrorLogger(ERR_USAGE, LOC, arg0, "variable", NULL))
return (TCL_ERROR); /** ------ EXIT (FAILURE) -----> **/
}
/**
** Display only mode?
**/
if (g_flags & M_DISPLAY) {
fprintf(stderr, "%s\t ", Tcl_GetString(*objv++));
while (--objc)
fprintf(stderr, "%s ", Tcl_GetString(*objv++));
fprintf(stderr, "\n");
return (TCL_OK); /** -------- EXIT PROCEDURE -------> **/
}
/**
** Switch command
**/
arg1 = Tcl_GetString(objv[1]);
arg2 = Tcl_GetString(objv[2]);
if (g_flags & M_SWSTATE1) {
mhash_add(markAliasHashTable, arg1, M_SWSTATE1);
return (TCL_OK); /** -------- EXIT PROCEDURE -------> **/
} else if (g_flags & M_SWSTATE2) {
mhash_add(markAliasHashTable, arg1, M_SWSTATE2);
} else if (g_flags & M_SWSTATE3) {
intptr_t marked_val;
if ((marked_val =
(intptr_t) mhash_value(markAliasHashTable, arg1))) {
if (marked_val == M_SWSTATE1)
mhash_add(aliasUnsetHashTable, arg1, arg2);
else
return (TCL_OK); /** -- EXIT PROCEDURE -> **/
}
} else if (g_flags & M_REMOVE) {
mhash_add(aliasUnsetHashTable, arg1, arg2);
}
/**
** Finally remove or set the alias
**/
if (*arg0 == 'u' || (g_flags & M_REMOVE))
mhash_add(aliasUnsetHashTable, arg1, arg2);
else
mhash_add(aliasSetHashTable, arg1, arg2);
return (TCL_OK);
} /** End of 'cmdSetAlias' **/