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/* $OpenBSD: ex_usage.c,v 1.7 2009/10/27 23:59:47 deraadt Exp $ */
/*-
* Copyright (c) 1992, 1993, 1994
* The Regents of the University of California. All rights reserved.
* Copyright (c) 1992, 1993, 1994, 1995, 1996
* Keith Bostic. All rights reserved.
*
* See the LICENSE file for redistribution information.
*/
#include "config.h"
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/time.h>
#include <bitstring.h>
#include <ctype.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "../common/common.h"
#include "../vi/vi.h"
/*
* ex_help -- :help
* Display help message.
*
* PUBLIC: int ex_help(SCR *, EXCMD *);
*/
int
ex_help(sp, cmdp)
SCR *sp;
EXCMD *cmdp;
{
(void)ex_puts(sp,
"To see the list of vi commands, enter \":viusage<CR>\"\n");
(void)ex_puts(sp,
"To see the list of ex commands, enter \":exusage<CR>\"\n");
(void)ex_puts(sp,
"For an ex command usage statement enter \":exusage [cmd]<CR>\"\n");
(void)ex_puts(sp,
"For a vi key usage statement enter \":viusage [key]<CR>\"\n");
(void)ex_puts(sp, "To exit, enter \":q!\"\n");
return (0);
}
/*
* ex_usage -- :exusage [cmd]
* Display ex usage strings.
*
* PUBLIC: int ex_usage(SCR *, EXCMD *);
*/
int
ex_usage(sp, cmdp)
SCR *sp;
EXCMD *cmdp;
{
ARGS *ap;
EXCMDLIST const *cp;
int newscreen;
char *name, *p, nb[MAXCMDNAMELEN + 5];
switch (cmdp->argc) {
case 1:
ap = cmdp->argv[0];
if (isupper(ap->bp[0])) {
newscreen = 1;
ap->bp[0] = tolower(ap->bp[0]);
} else
newscreen = 0;
for (cp = cmds; cp->name != NULL &&
memcmp(ap->bp, cp->name, ap->len); ++cp);
if (cp->name == NULL ||
(newscreen && !F_ISSET(cp, E_NEWSCREEN))) {
if (newscreen)
ap->bp[0] = toupper(ap->bp[0]);
(void)ex_printf(sp, "The %.*s command is unknown\n",
(int)ap->len, ap->bp);
} else {
(void)ex_printf(sp,
"Command: %s\n Usage: %s\n", cp->help, cp->usage);
/*
* !!!
* The "visual" command has two modes, one from ex,
* one from the vi colon line. Don't ask.
*/
if (cp != &cmds[C_VISUAL_EX] &&
cp != &cmds[C_VISUAL_VI])
break;
if (cp == &cmds[C_VISUAL_EX])
cp = &cmds[C_VISUAL_VI];
else
cp = &cmds[C_VISUAL_EX];
(void)ex_printf(sp,
"Command: %s\n Usage: %s\n", cp->help, cp->usage);
}
break;
case 0:
for (cp = cmds; cp->name != NULL && !INTERRUPTED(sp); ++cp) {
/*
* The ^D command has an unprintable name.
*
* XXX
* We display both capital and lower-case versions of
* the appropriate commands -- no need to add in extra
* room, they're all short names.
*/
if (cp == &cmds[C_SCROLL])
name = "^D";
else if (F_ISSET(cp, E_NEWSCREEN)) {
nb[0] = '[';
nb[1] = toupper(cp->name[0]);
nb[2] = cp->name[0];
nb[3] = ']';
for (name = cp->name + 1,
p = nb + 4; (*p++ = *name++) != '\0';);
name = nb;
} else
name = cp->name;
(void)ex_printf(sp,
"%*s: %s\n", MAXCMDNAMELEN, name, cp->help);
}
break;
default:
abort();
}
return (0);
}
/*
* ex_viusage -- :viusage [key]
* Display vi usage strings.
*
* PUBLIC: int ex_viusage(SCR *, EXCMD *);
*/
int
ex_viusage(sp, cmdp)
SCR *sp;
EXCMD *cmdp;
{
VIKEYS const *kp;
int key;
switch (cmdp->argc) {
case 1:
if (cmdp->argv[0]->len != 1) {
ex_emsg(sp, cmdp->cmd->usage, EXM_USAGE);
return (1);
}
key = cmdp->argv[0]->bp[0];
if (key > MAXVIKEY)
goto nokey;
/* Special case: '[' and ']' commands. */
if ((key == '[' || key == ']') && cmdp->argv[0]->bp[1] != key)
goto nokey;
/* Special case: ~ command. */
if (key == '~' && O_ISSET(sp, O_TILDEOP))
kp = &tmotion;
else
kp = &vikeys[key];
if (kp->usage == NULL)
nokey: (void)ex_printf(sp,
"The %s key has no current meaning\n",
KEY_NAME(sp, key));
else
(void)ex_printf(sp,
" Key:%s%s\nUsage: %s\n",
isblank(*kp->help) ? "" : " ", kp->help, kp->usage);
break;
case 0:
for (key = 0; key <= MAXVIKEY && !INTERRUPTED(sp); ++key) {
/* Special case: ~ command. */
if (key == '~' && O_ISSET(sp, O_TILDEOP))
kp = &tmotion;
else
kp = &vikeys[key];
if (kp->help != NULL)
(void)ex_printf(sp, "%s\n", kp->help);
}
break;
default:
abort();
}
return (0);
}
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