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| -rw-r--r-- | miscutils/ascii.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/miscutils/ascii.c b/miscutils/ascii.c new file mode 100644 index 0000000..98c11fa --- /dev/null +++ b/miscutils/ascii.c @@ -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; +} |