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