moved term.h to tlibc
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include/tlibc/term.h
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47
include/tlibc/term.h
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#pragma once
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#include "tlibc/errors.h"
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typedef struct TerminalSize {
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i16 cols;
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i16 rows;
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} TerminalSize;
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typedef enum Color16 {
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Color16_Black = 30,
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Color16_DarkRed = 31,
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Color16_DarkGreen = 32,
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Color16_DarkYellow = 33,
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Color16_DarkBlue = 34,
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Color16_DarkMagenta = 35,
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Color16_DarkCyan = 36,
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Color16_Gray = 37,
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Color16_DarkGray = 90,
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Color16_Red = 91,
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Color16_Green = 92,
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Color16_Yellow = 93,
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Color16_Blue = 94,
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Color16_Magenta = 95,
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Color16_Cyan = 96,
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Color16_White = 97
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} Color16;
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Result(void) term_init();
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Result(void) term_getSize(TerminalSize* out);
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Result(void) term_readLine(char* buf, u32 bufsize);
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Result(void) term_readLineHidden(char *buf, u32 bufsize);
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void term_setFgColor16(Color16 c);
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void term_setBgColor16(Color16 c);
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void term_bold();
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void term_italic();
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void term_underline();
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void term_strikethrough();
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void term_resetColors();
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void term_clear();
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void term_eraseRow();
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void term_resetCursor();
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void term_cursorMove(u16 row, u16 column);
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void term_cursorHide();
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void term_cursorShow();
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189
src/term.c
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189
src/term.c
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#include "tlibc/term.h"
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#if defined(_WIN64) || defined(_WIN32)
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#include <windows.h>
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#define try_win_bool(EXPR) if(!(EXPR)) { Return RESULT_ERROR_FMT(#EXPR " failed with WindowsError %lu", GetLastError()); }
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#else
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#include <unistd.h>
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#include <sys/ioctl.h>
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#include <termios.h>
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#define try_zero_errno(EXPR) if((EXPR) != 0) { \
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char* errno_s = strerror_malloc(errno); \
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ResultVar(void) err = RESULT_ERROR_FMT(#EXPR " failed with errno: %s", strerror(errno)); \
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free(errno_s); \
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Return err; \
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}
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#endif
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Result(void) term_init(){
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Deferral(8);
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#if defined(_WIN64) || defined(_WIN32)
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DWORD mode = 0;
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HANDLE console_handle;
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// configure stdout
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console_handle = GetStdHandle(STD_OUTPUT_HANDLE);
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try_assert(console_handle != INVALID_HANDLE_VALUE);
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GetConsoleMode(console_handle, &mode);
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// https://learn.microsoft.com/en-us/windows/console/setconsolemode
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mode |= ENABLE_VIRTUAL_TERMINAL_PROCESSING;
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mode |= ENABLE_PROCESSED_OUTPUT;
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mode |= DISABLE_NEWLINE_AUTO_RETURN;
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SetConsoleMode(console_handle, mode);
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// configure stderr
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console_handle = GetStdHandle(STD_ERROR_HANDLE);
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try_assert(console_handle != INVALID_HANDLE_VALUE);
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GetConsoleMode(console_handle, &mode);
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mode |= ENABLE_VIRTUAL_TERMINAL_PROCESSING;
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mode |= ENABLE_PROCESSED_OUTPUT;
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mode |= DISABLE_NEWLINE_AUTO_RETURN;
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SetConsoleMode(console_handle, mode);
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// configure stdin
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console_handle = GetStdHandle(STD_INPUT_HANDLE);
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try_assert(console_handle != INVALID_HANDLE_VALUE);
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GetConsoleMode(console_handle, &mode);
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mode |= ENABLE_VIRTUAL_TERMINAL_INPUT;
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SetConsoleMode(console_handle, mode);
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#endif
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Return RESULT_VOID;
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}
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i64 getenv_int(const char* var_name){
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char* s = getenv(var_name);
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if(s == NULL)
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return -1;
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return strtoll(s, NULL, 0);
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}
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Result(void) term_getSize(TerminalSize* out) {
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Deferral(4);
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#if defined(_WIN64) || defined(_WIN32)
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// helps when STD_OUT is redirected to a file
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HANDLE console_handle_stderr = GetStdHandle(STD_ERROR_HANDLE);
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try_assert(console_handle_stderr != INVALID_HANDLE_VALUE)
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CONSOLE_SCREEN_BUFFER_INFO consoleInfo;
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try_win_bool(GetConsoleScreenBufferInfo(console_handle_stderr, &consoleInfo));
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out->cols = consoleInfo.srWindow.Right - consoleInfo.srWindow.Left + 1;
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out->rows = consoleInfo.srWindow.Bottom - consoleInfo.srWindow.Top + 1;
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#else
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struct winsize ws = {0};
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// try to get terminal size from stdin, stdout, stderr
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if (ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) == 0 ||
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ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == 0 ||
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ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == 0 ){
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out->cols = ws.ws_col;
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out->rows = ws.ws_row;
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}
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// try to get size from environtent variables
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else {
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out->cols = getenv_int("COLUMNS");
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out->rows = getenv_int("LINES");
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}
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#endif
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try_assert(out->cols > 0);
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try_assert(out->rows > 0);
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Return RESULT_VOID;
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}
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Result(void) term_readLine(char* buf, u32 bufsize) {
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Deferral(1);
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if(fgets(buf, bufsize, stdin) == NULL){
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try_stderrcode(ferror(stdin));
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}
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Return RESULT_VOID;
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}
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Result(void) term_readLineHidden(char *buf, u32 bufsize) {
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Deferral(4);
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#if defined(_WIN64) || defined(_WIN32)
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HANDLE console_handle_stdin = GetStdHandle(STD_INPUT_HANDLE);
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try_assert(console_handle_stdin != INVALID_HANDLE_VALUE);
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DWORD old_mode;
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GetConsoleMode(console_handle_stdin, &old_mode);
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// turn off echo
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DWORD new_mode = old_mode & ~(ENABLE_ECHO_INPUT);
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SetConsoleMode(console_handle_stdin, new_mode);
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// restore echo
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Defer(SetConsoleMode(console_handle_stdin, old_mode));
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#else
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struct termios old_mode, new_mode;
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try_zero_errno(tcgetattr(STDIN_FILENO, &old_mode));
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new_mode = old_mode;
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// turn off echo
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new_mode.c_lflag &= ~(ECHO);
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try_zero_errno(tcsetattr(STDIN_FILENO, TCSAFLUSH, &new_mode));
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// restore echo
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Defer(tcsetattr(STDIN_FILENO, TCSAFLUSH, &old_mode));
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#endif
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// read line
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try_void(term_readLine(buf, bufsize));
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fputc('\n', stdout);
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Return RESULT_VOID;
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}
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/*
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Most of escape sequences can be found there
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https://gist.github.com/fnky/458719343aabd01cfb17a3a4f7296797
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*/
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#define ESC "\x1b"
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#define CSI ESC"["
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void term_setFgColor16(Color16 c){
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printf(CSI"%um", c);
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}
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void term_setBgColor16(Color16 c){
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printf(CSI"%um", c + 10);
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}
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void term_bold(){
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printf(CSI"1m");
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}
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void term_italic(){
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printf(CSI"3m");
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}
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void term_underline(){
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printf(CSI"4m");
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}
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void term_strikethrough(){
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printf(CSI"9m");
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}
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void term_resetCursor() {
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printf(CSI"H");
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}
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void term_resetColors() {
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printf(CSI"0m");
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}
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void term_clear() {
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printf(CSI"0m" CSI"H" CSI"2J");
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}
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void term_eraseRow(){
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printf(CSI"2K\r");
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}
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void term_cursorMove(u16 row, u16 column) {
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printf(CSI"%u;%uH", row, column);
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}
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void term_cursorHide() {
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printf(CSI"?25l");
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}
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void term_cursorShow() {
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printf(CSI"?25h");
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}
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