enhance the key_reader program

The original `key_reader` program was useful but didn't do much that `xxd`
or `od -tx1z` didn't do. Furthermore, it wasn't built and installed by
default. This change adds features that make it superior to those programs
for decoding interactive key presses and makes it a first-class citizen
like the `fish_indent` program that is always available.

Fixes #2991

1 files changed, 0 insertions, 74 deletions

diff --git a/src/key_reader.cpp b/src/key_reader.cpp
deleted file mode 100644
index 0d0b997f..00000000
--- a/src/key_reader.cpp
+++ /dev/null
@@ -1,74 +0,0 @@
-// A small utility to print the resulting key codes from pressing a key. Servers the same function
-// as hitting ^V in bash, but I prefer the way key_reader works.
-//
-// Type ^C to exit the program.
-#include <locale.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <termcap.h>
-#include <termios.h>
-
-#include "common.h"
-#include "fallback.h"  // IWYU pragma: keep
-#include "input_common.h"
-
-int writestr(char *str) {
-    write_ignore(1, str, strlen(str));
-    return 0;
-}
-
-int main(int argc, char **argv) {
-    set_main_thread();
-    setup_fork_guards();
-    setlocale(LC_ALL, "");
-
-    if (argc == 2) {
-        static char term_buffer[2048];
-        char *termtype = getenv("TERM");
-        char *tbuff = new char[9999];
-        char *res;
-
-        tgetent(term_buffer, termtype);
-        res = tgetstr(argv[1], &tbuff);
-        if (res != 0) {
-            while (*res != 0) {
-                printf("%d ", *res);
-
-                res++;
-            }
-            printf("\n");
-        } else {
-            printf("Undefined sequence\n");
-        }
-    } else {
-        char scratch[1024];
-        unsigned int c;
-
-        struct termios modes,  // so we can change the modes
-            savemodes;         // so we can reset the modes when we're done
-
-        input_common_init(0);
-
-        tcgetattr(0, &modes);  // get the current terminal modes
-        savemodes = modes;     // save a copy so we can reset them
-
-        modes.c_lflag &= ~ICANON;  // turn off canonical mode
-        modes.c_lflag &= ~ECHO;    // turn off echo mode
-        modes.c_cc[VMIN] = 1;
-        modes.c_cc[VTIME] = 0;
-        tcsetattr(0, TCSANOW, &modes);  // set the new modes
-        while (1) {
-            if ((c = input_common_readch(0)) == EOF) break;
-            if ((c > 31) && (c != 127))
-                sprintf(scratch, "dec: %u hex: %x char: %c\n", c, c, c);
-            else
-                sprintf(scratch, "dec: %u hex: %x\n", c, c);
-            writestr(scratch);
-        }
-        tcsetattr(0, TCSANOW, &savemodes);  // reset the terminal to the saved mode
-        input_common_destroy();
-    }
-
-    return 0;
-}