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/* tr.c -- The tr command. */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2010,2013 Free Software Foundation, Inc.
*
* GRUB 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.
*
* GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/dl.h>
#include <grub/mm.h>
#include <grub/err.h>
#include <grub/env.h>
#include <grub/i18n.h>
#include <grub/misc.h>
#include <grub/extcmd.h>
GRUB_MOD_LICENSE ("GPLv3+");
static const struct grub_arg_option options[] =
{
{ "set", 's', 0, N_("Set a variable to return value."), N_("VARNAME"), ARG_TYPE_STRING },
{ "upcase", 'U', 0, N_("Translate to upper case."), 0, 0 },
{ "downcase", 'D', 0, N_("Translate to lower case."), 0, 0 },
{ 0, 0, 0, 0, 0, 0 }
};
static const char *letters_lowercase = "abcdefghijklmnopqrstuvwxyz";
static const char *letters_uppercase = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
static grub_err_t
grub_cmd_tr (grub_extcmd_context_t ctxt, int argc, char **args)
{
char *var = 0;
const char *input = 0;
char *output = 0, *optr;
const char *s1 = 0;
const char *s2 = 0;
const char *iptr;
/* Select the defaults from options. */
if (ctxt->state[0].set) {
var = ctxt->state[0].arg;
input = grub_env_get (var);
}
if (ctxt->state[1].set) {
s1 = letters_lowercase;
s2 = letters_uppercase;
}
if (ctxt->state[2].set) {
s1 = letters_uppercase;
s2 = letters_lowercase;
}
/* Check for arguments and update the defaults. */
if (argc == 1)
input = args[0];
else if (argc == 2) {
s1 = args[0];
s2 = args[1];
} else if (argc == 3) {
s1 = args[0];
s2 = args[1];
input = args[2];
} else if (argc > 3)
return grub_error (GRUB_ERR_BAD_ARGUMENT, "too many parameters");
if (!s1 || !s2 || !input)
return grub_error (GRUB_ERR_BAD_ARGUMENT, "missing parameters");
if (grub_strlen (s1) != grub_strlen (s2))
return grub_error (GRUB_ERR_BAD_ARGUMENT, "set sizes did not match");
/* Translate input into output buffer. */
output = grub_malloc (grub_strlen (input) + 1);
if (! output)
return grub_errno;
optr = output;
for (iptr = input; *iptr; iptr++)
{
char *p = grub_strchr (s1, *iptr);
if (p)
*optr++ = s2[p - s1];
else
*optr++ = *iptr;
}
*optr = '\0';
if (ctxt->state[0].set)
grub_env_set (var, output);
else
grub_printf ("%s\n", output);
grub_free (output);
return GRUB_ERR_NONE;
}
static grub_extcmd_t cmd;
GRUB_MOD_INIT(tr)
{
cmd = grub_register_extcmd ("tr", grub_cmd_tr, 0, N_("[OPTIONS] [SET1] [SET2] [STRING]"),
N_("Translate SET1 characters to SET2 in STRING."), options);
}
GRUB_MOD_FINI(tr)
{
grub_unregister_extcmd (cmd);
}
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