34d79c9aa
Denys Vlasenko
2021-06-21
Subject
ascii: new applet
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Commit Diff GitHub →
miscutils/ascii.c+51 -0
| @@ -0,0 +1,51 @@ | |
| + | /* vi: set sw=4 ts=4: */ |
| + | /* |
| + | * Copyright (C) 2021 Denys Vlasenko <[email protected]> |
| + | * |
| + | * 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; |
| + | } |