Idris2/support/c/idris_term.c

#ifdef _WIN32

#include <windows.h>

#ifndef ENABLE_VIRTUAL_TERMINAL_PROCESSING
#define ENABLE_VIRTUAL_TERMINAL_PROCESSING 0x0004
#endif

void idris2_setupTerm() {
  HANDLE stdout_handle = GetStdHandle(STD_OUTPUT_HANDLE);
  DWORD outmode = 0;
  GetConsoleMode(stdout_handle, &outmode);
  outmode |= ENABLE_VIRTUAL_TERMINAL_PROCESSING;
  SetConsoleMode(stdout_handle, outmode);
}

int idris2_getTermCols() {
  CONSOLE_SCREEN_BUFFER_INFO csbi;
  if (GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &csbi)) {
    return (int)csbi.srWindow.Right - csbi.srWindow.Left + 1;
  }
  return 0;
}

int idris2_getTermLines() {
  CONSOLE_SCREEN_BUFFER_INFO csbi;
  if (GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &csbi)) {
    return (int)csbi.srWindow.Bottom - csbi.srWindow.Top + 1;
  }
  return 0;
}

#else

#include <sys/ioctl.h>

void idris2_setupTerm() {
  // NOTE: Currently not needed for non windows systems
}

int idris2_getTermCols() {
  struct winsize ts;
  int err = ioctl(0, TIOCGWINSZ, &ts);
  if (err) {
    err = ioctl(1, TIOCGWINSZ, &ts);
  }
  if (err)
    return 0;
  return (int)ts.ws_col;
}

int idris2_getTermLines() {
  struct winsize ts;
  int err = ioctl(0, TIOCGWINSZ, &ts);
  if (err) {
    err = ioctl(1, TIOCGWINSZ, &ts);
  }
  if (err)
    return 0;
  return (int)ts.ws_row;
}

#endif