126 lines
3.2 KiB
C
126 lines
3.2 KiB
C
/* tr.c -- The tr command. */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2010,2013 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/dl.h>
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#include <grub/mm.h>
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#include <grub/err.h>
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#include <grub/env.h>
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#include <grub/i18n.h>
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#include <grub/misc.h>
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#include <grub/extcmd.h>
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GRUB_MOD_LICENSE ("GPLv3+");
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static const struct grub_arg_option options[] =
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{
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{ "set", 's', 0, N_("Set a variable to return value."), N_("VARNAME"), ARG_TYPE_STRING },
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{ "upcase", 'U', 0, N_("Translate to upper case."), 0, 0 },
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{ "downcase", 'D', 0, N_("Translate to lower case."), 0, 0 },
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{ 0, 0, 0, 0, 0, 0 }
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};
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static const char *letters_lowercase = "abcdefghijklmnopqrstuvwxyz";
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static const char *letters_uppercase = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
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static grub_err_t
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grub_cmd_tr (grub_extcmd_context_t ctxt, int argc, char **args)
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{
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char *var = 0;
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const char *input = 0;
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char *output = 0, *optr;
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const char *s1 = 0;
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const char *s2 = 0;
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const char *iptr;
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/* Select the defaults from options. */
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if (ctxt->state[0].set) {
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var = ctxt->state[0].arg;
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input = grub_env_get (var);
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}
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if (ctxt->state[1].set) {
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s1 = letters_lowercase;
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s2 = letters_uppercase;
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}
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if (ctxt->state[2].set) {
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s1 = letters_uppercase;
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s2 = letters_lowercase;
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}
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/* Check for arguments and update the defaults. */
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if (argc == 1)
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input = args[0];
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else if (argc == 2) {
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s1 = args[0];
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s2 = args[1];
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} else if (argc == 3) {
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s1 = args[0];
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s2 = args[1];
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input = args[2];
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} else if (argc > 3)
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return grub_error (GRUB_ERR_BAD_ARGUMENT, "too many parameters");
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if (!s1 || !s2 || !input)
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return grub_error (GRUB_ERR_BAD_ARGUMENT, "missing parameters");
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if (grub_strlen (s1) != grub_strlen (s2))
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return grub_error (GRUB_ERR_BAD_ARGUMENT, "set sizes did not match");
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/* Translate input into output buffer. */
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output = grub_malloc (grub_strlen (input) + 1);
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if (! output)
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return grub_errno;
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optr = output;
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for (iptr = input; *iptr; iptr++)
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{
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char *p = grub_strchr (s1, *iptr);
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if (p)
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*optr++ = s2[p - s1];
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else
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*optr++ = *iptr;
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}
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*optr = '\0';
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if (ctxt->state[0].set)
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grub_env_set (var, output);
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else
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grub_printf ("%s\n", output);
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grub_free (output);
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return GRUB_ERR_NONE;
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}
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static grub_extcmd_t cmd;
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GRUB_MOD_INIT(tr)
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{
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cmd = grub_register_extcmd ("tr", grub_cmd_tr, 0, N_("[OPTIONS] [SET1] [SET2] [STRING]"),
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N_("Translate SET1 characters to SET2 in STRING."), options);
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}
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GRUB_MOD_FINI(tr)
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{
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grub_unregister_extcmd (cmd);
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}
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