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ascii: new applet

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function                                             old     new   delta
.rodata                                           103397  103670    +273
ascii_main                                             -     177    +177
applet_names                                        2739    2745      +6
applet_main                                         1584    1588      +4
applet_suid                                           99     100      +1
applet_install_loc                                   198     199      +1
packed_usage                                       33716   33713      -3
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(add/remove: 2/0 grow/shrink: 5/1 up/down: 462/-3)            Total: 459 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2021-06-21 17:51:13 +02:00
parent 51358757c7
commit 34d79c9aa0
1 changed files with 51 additions and 0 deletions
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51
miscutils/ascii.c Normal file
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@ -0,0 +1,51 @@
/* vi: set sw=4 ts=4: */
/*
* Copyright (C) 2021 Denys Vlasenko <vda.linux@googlemail.com>
*
* Licensed under GPLv2, see file LICENSE in this source tree.
*/
//config:config ASCII
//config: bool "ascii"
//config: default y
//config: help
//config: Print ascii table.
//config:
//applet:IF_ASCII(APPLET(ascii, BB_DIR_USR_BIN, BB_SUID_DROP))
//kbuild:lib-$(CONFIG_ASCII) += ascii.o
//usage:#define ascii_trivial_usage NOUSAGE_STR
//usage:#define ascii_full_usage ""
#include "libbb.h"
int ascii_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int ascii_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
{
const char *ctrl =
"NUL""SOH""STX""ETX""EOT""ENQ""ACK""BEL"
"BS ""HT ""NL ""VT ""FF ""CR ""SO ""SI "
"DLE""DC1""DC2""DC3""DC4""NAK""SYN""ETB"
"CAN""EM ""SUB""ESC""FS ""GS ""RS ""US "
;
//TODO: od has a similar table, can we reuse it?
char last[2];
unsigned i;
last[1] = '\0';
printf("Dec Hex Dec Hex Dec Hex Dec Hex Dec Hex Dec Hex Dec Hex Dec Hex\n");
for (i = 0; i < 16; i++) {
printf("%3u %02x %.3s%4u %02x %.3s%4u %02x %c%4u %02x %c%4u %02x %c%4u %02x %c%5u %02x %c%5u %02x %s\n",
i+0x00, i+0x00, ctrl + i*3,
i+0x10, i+0x10, ctrl + i*3 + 16*3,
i+0x20, i+0x20, i+0x20,
i+0x30, i+0x30, i+0x30,
i+0x40, i+0x40, i+0x40,
i+0x50, i+0x50, i+0x50,
i+0x60, i+0x60, i+0x60,
i+0x70, i+0x70, (i+0x70 == 0x7f ? "DEL" : (last[0] = i+0x70, last))
);
}
return EXIT_SUCCESS;
}