src/console/c-util.c

#include "angband.h"

/* Hack - main-gcu.c wants to set this to TRUE */
bool multi_key_macros = FALSE;

static bool flush_later = FALSE;

void move_cursor(int row, int col)
{
	Term_gotoxy(col, row);
}

void flush(void)
{
	flush_later = TRUE;
}


/*
 * XXX -- Temporary version of "inkey" with no macros
 */
char inkey(void)
{
	char ch;

	/* Refresh screen */
	Term_fresh();

	/* Check for flush */
	if (flush_later)
	{
		/* Flush input */
		Term_flush();

		/* Clear the flag */
		flush_later = FALSE;
	}

	(void)(Term_inkey(&ch, TRUE, TRUE));

	return ch;
}


/*
 * Flush the screen, make a noise
 */
void bell(void)
{
	/* Mega-Hack -- Flush the output */
	Term_fresh();

	/* Make a bell noise (if allowed) */
	/*if (ring_bell)*/ Term_xtra(TERM_XTRA_NOISE, 0);

	/* Flush the input (later!) */
	flush();
}

/*
 * Display a string on the screen using an attribute, and clear
 * to the end of the line.
 */
void c_prt(byte attr, cptr str, int row, int col)
{
	/* Hack -- fake monochrome */
	/* if (!use_color) attr = TERM_WHITE; */

	/* Clear line, position cursor */
	Term_erase(col, row, 255);

	/* Dump the attr/text */
	Term_addstr(-1, attr, str);
}

/*
 * As above, but in "white"
 */
void prt(cptr str, int row, int col)
{
	/* Spawn */
	c_prt(TERM_WHITE, str, row, col);
}

/*
 * Get some input at the cursor location.
 * Assume the buffer is initialized to a default string.
 * Note that this string is often "empty" (see below).
 * The default buffer is displayed in yellow until cleared.
 * Pressing RETURN right away accepts the default entry.
 * Normal chars clear the default and append the char.
 * Backspace clears the default or deletes the final char.
 * ESCAPE clears the buffer and the window and returns FALSE.
 * RETURN accepts the current buffer contents and returns TRUE.
 */

/* APD -- added private so passwords will not be displayed. */
bool askfor_aux(char *buf, int len, char private)
{
	int y, x;

	int i = 0;

	int k = 0;

	bool done = FALSE;


	/* Locate the cursor */
	Term_locate(&x, &y);

	/* Paranoia -- check len */
	if (len < 1) len = 1;

	/* Paranoia -- check column */
	if ((x < 0) || (x >= 80)) x = 0;

	/* Restrict the length */
	if (x + len > 80) len = 80 - x;


	/* Paranoia -- Clip the default entry */
	buf[len] = '\0';


	/* Display the default answer */
	Term_erase(x, y, len);
	Term_putstr(x, y, -1, TERM_YELLOW, buf);


	/* Process input */
	while (!done)
	{
		/* Place cursor */
		Term_gotoxy(x + k, y);

		/* Get a key */
		i = inkey();

		/* Analyze the key */
		switch (i)
		{
			case ESCAPE:
			k = 0;
			done = TRUE;
			break;

			case '\n':
			case '\r':
			k = strlen(buf);
			done = TRUE;
			break;

			case 0x7F:
			case '\010':
			if (k > 0) k--;
			break;

			default:
			if ((k < len) && (isprint(i)))
			{
				buf[k++] = i;
			}
			else
			{
				bell();
			}
			break;
		}

		/* Terminate */
		buf[k] = '\0';

		/* Update the entry */
		if (!private)
		{
			Term_erase(x, y, len);
			Term_putstr(x, y, -1, TERM_WHITE, buf);
		}
		else
		{
			Term_erase(x+k, y, len-k);
			if(k) Term_putch(x+k-1, y, TERM_WHITE, 'x');
		}
	}

	/* Aborted */
	if (i == ESCAPE) return (FALSE);

	/* Success */
	return (TRUE);
}


/*
 * Get a string from the user
 *
 * The "prompt" should take the form "Prompt: "
 *
 * Note that the initial contents of the string is used as
 * the default response, so be sure to "clear" it if needed.
 *
 * We clear the input, and return FALSE, on "ESCAPE".
 */
bool get_string(cptr prompt, char *buf, int len)
{
	bool res;

	/* Display prompt */
	prt(prompt, 0, 0);

	/* Ask the user for a string */
	res = askfor_aux(buf, len, 0);

	/* Clear prompt */
	prt("", 0, 0);

	/* Result */
	return (res);
}

/*
 * Prompts for a keypress
 *
 * The "prompt" should take the form "Command: "
 *
 * Returns TRUE unless the character is "Escape"
 */
bool get_com(cptr prompt, char *command)
{
	/* Display a prompt */
	prt(prompt, 0, 0);

	/* Get a key */
	*command = inkey();

	/* Clear the prompt */
	prt("", 0, 0);

	/* Handle "cancel" */
	if (*command == ESCAPE) return (FALSE);

	/* Success */
	return (TRUE);
}


/*
 * Request a command from the user.
 *
 * Sets command_cmd, command_dir, command_rep, command_arg.
 *
 * Note that "caret" ("^") is treated special, and is used to
 * allow manual input of control characters.  This can be used
 * on many machines to request repeated tunneling (Ctrl-H) and
 * on the Macintosh to request "Control-Caret".
 *
 * Note that this command is used both in the dungeon and in
 * stores, and must be careful to work in both situations.
 */
void request_command(bool shopping)
{
	char cmd;


	/* Flush the input */
	/* flush(); */

	/* Get a command */
	cmd = inkey();

	/* Return if no key was pressed */
	if (!cmd) return;

	/* Clear top line */
	prt("", 0, 0);

	/* Bypass "keymap" */
	if (cmd == '\\')
	{
		/* Get a char to use without casting */
		(void)(get_com("Command: ", &cmd));

		/* Hack -- allow "control chars" to be entered */
		if (cmd == '^')
		{
			/* Get a char to "cast" into a control char */
			(void)(get_com("Command: Control: ", &cmd));

			/* Convert */
			cmd = KTRL(cmd);
		}

		/* Use the key directly */
		command_cmd = cmd;
	}

	else
	{
		/* Hack -- allow "control chars" to be entered */
		if (cmd == '^')
		{
			/* Get a char to "cast" into a control char */
			(void)(get_com("Control: ", &cmd));

			/* Convert */
			cmd = KTRL(cmd);
		}

		/* Use the key directly */
		command_cmd = cmd;
	}

	/* Paranoia */
	if (!command_cmd) command_cmd = ESCAPE;

	/* Hack -- erase the message line. */
	prt("", 0, 0);
}

/*
 * Display a string on the screen using an attribute.
 *
 * At the given location, using the given attribute, if allowed,
 * add the given string.  Do not clear the line.
 */
void c_put_str(byte attr, cptr str, int row, int col)
{
	/* Position cursor, Dump the attr/text */
	Term_putstr(col, row, -1, attr, str);
}


/*
 * As above, but in "white"
 */
void put_str(cptr str, int row, int col)
{
	/* Spawn */
	Term_putstr(col, row, -1, TERM_WHITE, str);
}

/*
 * Verify something with the user
 *
 * The "prompt" should take the form "Query? "
 *
 * Note that "[y/n]" is appended to the prompt.
 */
bool get_check(cptr prompt)
{
	int i;

	char buf[80];

	/* Hack -- Build a "useful" prompt */
	strnfmt(buf, 78, "%.70s[y/n] ", prompt);

	/* Prompt for it */
	prt(buf, 0, 0);

	/* Get an acceptable answer */
	while (TRUE)
	{
		i = inkey();
		if (i == ESCAPE) break;
		if (strchr("YyNn", i)) break;
		bell();
	}

	/* Erase the prompt */
	prt("", 0, 0);

	/* Normal negation */
	if ((i != 'Y') && (i != 'y')) return (FALSE);

	/* Success */
	return (TRUE);
}


/*
 * Request a "quantity" from the user
 *
 * Hack -- allow "command_arg" to specify a quantity
 */
s16b c_get_quantity(cptr prompt, int max)
{
	int amt;

	char tmp[80];

	char buf[80];


	/* Build a prompt if needed */
	if (!prompt)
	{
		/* Build a prompt */
		sprintf(tmp, "Quantity (1-%d): ", max);

		/* Use that prompt */
		prompt = tmp;
	}


	/* Default to one */
	amt = 1;

	/* Build the default */
	sprintf(buf, "%d", amt);

	/* Ask for a quantity */
	if (!get_string(prompt, buf, 6)) return (0);

	/* Extract a number */
	amt = atoi(buf);

	/* A letter means "all" */
	if (isalpha(buf[0])) amt = max;

	/* Enforce the maximum */
	if (amt > max) amt = max;

	/* Enforce the minimum */
	if (amt < 0) amt = 0;

	/* Return the result */
	return (amt);
}

void clear_from(int row)
{
	int y;

	/* Erase requested rows */
	for (y = row; y < Term->hgt; y++)
	{
		/* Erase part of the screen */
		Term_erase(0, y, 255);
	}
}

void prt_num(cptr header, int num, int row, int col, byte color)
{
	int len = strlen(header);
	char out_val[32];
	put_str(header, row, col);
	put_str("   ", row, col + len);
	(void)sprintf(out_val, "%6d", num);
	c_put_str(color, out_val, row, col + len + 3);
}

void prt_lnum(cptr header, s32b num, int row, int col, byte color)
{
	int len = strlen(header);
	char out_val[32];
	put_str(header, row, col);
	(void)sprintf(out_val, "%9d", num);
	c_put_str(color, out_val, row, col + len);
}


#ifdef SET_UID

# ifndef HAS_USLEEP

/*
 * For those systems that don't have "usleep()" but need it.
 *
 * Fake "usleep()" function grabbed from the inl netrek server -cba
 */
int usleep(huge microSeconds)
{
	struct timeval		Timer;

	int			nfds = 0;

#ifdef FD_SET
	fd_set		*no_fds = NULL;
#else
	int			*no_fds = NULL;
#endif

	/* Was: int readfds, writefds, exceptfds; */
	/* Was: readfds = writefds = exceptfds = 0; */


	/* Paranoia -- No excessive sleeping */
	if (microSeconds > 4000000L) core("Illegal usleep() call");


	/* Wait for it */
	Timer.tv_sec = (microSeconds / 1000000L);
	Timer.tv_usec = (microSeconds % 1000000L);

	/* Wait for it */
	if (select(nfds, no_fds, no_fds, no_fds, &Timer) < 0)
	{
		/* Hack -- ignore interrupts */
		if (errno != EINTR) return -1;
	}

	/* Success */
	return 0;
}

# endif /* HAS_USLEEP */

#endif /* SET_UID */

#ifdef WIN32
int usleep(long microSeconds)
{
	Sleep(microSeconds/10); /* meassured in milliseconds not microseconds*/
}
#endif /* WIN32 */