mirror of
https://github.com/topjohnwu/ndk-busybox.git
synced 2024-12-05 10:27:15 +00:00
04095e58fb
This way, we can new get rid of all that tedious #define rubbish we used to need to enable specific messages. This way is enormously simpler, and as a bonus also ends up saving us 96 bytes. -Erik
235 lines
6.2 KiB
C
235 lines
6.2 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* Mini tr implementation for busybox
|
|
*
|
|
* Copyright (c) Michiel Huisjes
|
|
*
|
|
* This version of tr is adapted from Minix tr and was modified
|
|
* by Erik Andersen <andersee@debian.org> to be used in busybox.
|
|
*
|
|
* 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 2 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, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
* Original copyright notice is retained at the end of this file.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <sys/types.h>
|
|
#include "busybox.h"
|
|
|
|
static const int ASCII = 0377;
|
|
|
|
/* some glabals shared across this file */
|
|
static char com_fl, del_fl, sq_fl;
|
|
static short in_index, out_index;
|
|
/* these last are pointers to static buffers declared in tr_main */
|
|
static unsigned char *poutput, *pinput;
|
|
static unsigned char *pvector;
|
|
static char *pinvec, *poutvec;
|
|
|
|
|
|
static void convert()
|
|
{
|
|
short read_chars = 0;
|
|
short c, coded;
|
|
short last = -1;
|
|
|
|
for (;;) {
|
|
if (in_index == read_chars) {
|
|
if ((read_chars = read(0, (char *) pinput, BUFSIZ)) <= 0) {
|
|
if (write(1, (char *) poutput, out_index) != out_index)
|
|
write(2, write_error, strlen(write_error));
|
|
exit(0);
|
|
}
|
|
in_index = 0;
|
|
}
|
|
c = pinput[in_index++];
|
|
coded = pvector[c];
|
|
if (del_fl && pinvec[c])
|
|
continue;
|
|
if (sq_fl && last == coded && (pinvec[c] || poutvec[coded]))
|
|
continue;
|
|
poutput[out_index++] = last = coded;
|
|
if (out_index == BUFSIZ) {
|
|
if (write(1, (char *) poutput, out_index) != out_index) {
|
|
write(2, write_error, strlen(write_error));
|
|
exit(1);
|
|
}
|
|
out_index = 0;
|
|
}
|
|
}
|
|
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
static void map(register unsigned char *string1, unsigned int string1_len,
|
|
register unsigned char *string2, unsigned int string2_len)
|
|
{
|
|
unsigned char last = '0';
|
|
unsigned int i, j;
|
|
|
|
for (j = 0, i = 0; i < string1_len; i++) {
|
|
if (string2_len <= j)
|
|
pvector[string1[i]] = last;
|
|
else
|
|
pvector[string1[i]] = last = string2[j++];
|
|
}
|
|
}
|
|
|
|
static unsigned int expand(const char *arg, register unsigned char *buffer)
|
|
{
|
|
unsigned char *buffer_start = buffer;
|
|
int i, ac;
|
|
|
|
while (*arg) {
|
|
if (*arg == '\\') {
|
|
arg++;
|
|
*buffer++ = process_escape_sequence(&arg);
|
|
} else if (*arg == '[') {
|
|
arg++;
|
|
i = *arg++;
|
|
if (*arg++ != '-') {
|
|
*buffer++ = '[';
|
|
arg -= 2;
|
|
continue;
|
|
}
|
|
ac = *arg++;
|
|
while (i <= ac)
|
|
*buffer++ = i++;
|
|
arg++; /* Skip ']' */
|
|
} else
|
|
*buffer++ = *arg++;
|
|
}
|
|
|
|
return (buffer - buffer_start);
|
|
}
|
|
|
|
static int complement(unsigned char *buffer, int buffer_len)
|
|
{
|
|
register short i, j, ix;
|
|
char conv[ASCII + 2];
|
|
|
|
ix = 0;
|
|
for (i = 0; i <= ASCII; i++) {
|
|
for (j = 0; j < buffer_len; j++)
|
|
if (buffer[j] == i)
|
|
break;
|
|
if (j == buffer_len)
|
|
conv[ix++] = i & ASCII;
|
|
}
|
|
memcpy(buffer, conv, ix);
|
|
return ix;
|
|
}
|
|
|
|
extern int tr_main(int argc, char **argv)
|
|
{
|
|
register unsigned char *ptr;
|
|
int output_length=0, input_length;
|
|
int idx = 1;
|
|
int i;
|
|
RESERVE_BB_BUFFER(output, BUFSIZ);
|
|
RESERVE_BB_BUFFER(input, BUFSIZ);
|
|
RESERVE_BB_UBUFFER(vector, ASCII+1);
|
|
RESERVE_BB_BUFFER(invec, ASCII+1);
|
|
RESERVE_BB_BUFFER(outvec, ASCII+1);
|
|
|
|
/* ... but make them available globally */
|
|
poutput = output;
|
|
pinput = input;
|
|
pvector = vector;
|
|
pinvec = invec;
|
|
poutvec = outvec;
|
|
|
|
if (argc > 1 && argv[idx][0] == '-') {
|
|
for (ptr = (unsigned char *) &argv[idx][1]; *ptr; ptr++) {
|
|
switch (*ptr) {
|
|
case 'c':
|
|
com_fl = TRUE;
|
|
break;
|
|
case 'd':
|
|
del_fl = TRUE;
|
|
break;
|
|
case 's':
|
|
sq_fl = TRUE;
|
|
break;
|
|
default:
|
|
show_usage();
|
|
}
|
|
}
|
|
idx++;
|
|
}
|
|
for (i = 0; i <= ASCII; i++) {
|
|
vector[i] = i;
|
|
invec[i] = outvec[i] = FALSE;
|
|
}
|
|
|
|
if (argv[idx] != NULL) {
|
|
input_length = expand(argv[idx++], input);
|
|
if (com_fl)
|
|
input_length = complement(input, input_length);
|
|
if (argv[idx] != NULL) {
|
|
if (*argv[idx] == '\0')
|
|
error_msg_and_die("STRING2 cannot be empty");
|
|
output_length = expand(argv[idx], output);
|
|
map(input, input_length, output, output_length);
|
|
}
|
|
for (i = 0; i < input_length; i++)
|
|
invec[(int)input[i]] = TRUE;
|
|
for (i = 0; i < output_length; i++)
|
|
outvec[(int)output[i]] = TRUE;
|
|
}
|
|
convert();
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Copyright (c) 1987,1997, Prentice Hall
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use of the MINIX operating system in source and
|
|
* binary forms, with or without modification, are permitted provided
|
|
* that the following conditions are met:
|
|
*
|
|
* Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
*
|
|
* Redistributions in binary form must reproduce the above
|
|
* copyright notice, this list of conditions and the following
|
|
* disclaimer in the documentation and/or other materials provided
|
|
* with the distribution.
|
|
*
|
|
* Neither the name of Prentice Hall nor the names of the software
|
|
* authors or contributors may be used to endorse or promote
|
|
* products derived from this software without specific prior
|
|
* written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS, AUTHORS, AND
|
|
* CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
|
|
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL PRENTICE HALL OR ANY AUTHORS OR CONTRIBUTORS BE
|
|
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
|
|
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
|
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
|
|
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
|
|
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
*/
|
|
|