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/*
 * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
 * See LICENSE file for license details.
 */
#include "dwm.h"
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/wait.h>
#include <unistd.h>

/* static */

static void
bad_malloc(unsigned int size)
{
	eprint("fatal: could not malloc() %u bytes\n", size);
}

/* extern */

void *
emallocz(unsigned int size)
{
	void *res = calloc(1, size);

	if(!res)
		bad_malloc(size);
	return res;
}

void
eprint(const char *errstr, ...)
{
	va_list ap;

	va_start(ap, errstr);
	vfprintf(stderr, errstr, ap);
	va_end(ap);
	exit(EXIT_FAILURE);
}

void
spawn(Arg *arg)
{
	static char *shell = NULL;

	if(!shell && !(shell = getenv("SHELL")))
		shell = "/bin/sh";

	if(!arg->cmd)
		return;
	if(fork() == 0) {
		if(fork() == 0) {
			if(dpy)
				close(ConnectionNumber(dpy));
			setsid();
			execl(shell, shell, "-c", arg->cmd, NULL);
			fprintf(stderr, "dwm: execl '%s -c %s'", shell, arg->cmd);
			perror(" failed");
		}
		exit(0);
	}
	wait(0);
}
e screen. Return negative values before tb_init() or after * tb_shutdown() */ int tb_width(void); int tb_height(void); /* Update the screen with internal state. Most methods below modify just the * internal state of the screen. Changes won't be visible until you call * tb_present(). */ void tb_present(void); /* Variant of tb_present() that always refreshes the entire screen. */ void tb_sync(void); /* Returns a pointer to the internal screen state: a 1D array of cells in * raster order. You'll need to call tb_width() and tb_height() for the * array's dimensions. The array stays valid until tb_clear() or tb_present() * are called. */ struct tb_cell *tb_cell_buffer(); /* Clear the internal screen state using either TB_DEFAULT or the * color/attributes set by tb_set_clear_attributes(). */ void tb_clear(void); void tb_set_clear_attributes(uint16_t fg, uint16_t bg); /* Move the cursor. Upper-left character is (0, 0). */ void tb_set_cursor(int cx, int cy); /* To hide the cursor, call tb_set_cursor(TB_HIDE_CURSOR, TB_HIDE_CURSOR). * Cursor starts out hidden. */ #define TB_HIDE_CURSOR -1 /* Modify a specific cell of the screen. Don't forget to call tb_present() to * commit your changes. */ void tb_change_cell(int x, int y, uint32_t ch, uint16_t fg, uint16_t bg); /*** 2. Controlling keyboard events. */ struct tb_event { uint8_t type; /* fields for type TB_EVENT_KEY. At most one of 'key' and 'ch' will be set at * any time. */ uint16_t key; uint32_t ch; /* fields for type TB_EVENT_RESIZE */ int32_t w; int32_t h; /* fields for type TB_EVENT_MOUSE */ int32_t x; int32_t y; }; /* Possible values for tb_event.type. */ #define TB_EVENT_KEY 1 #define TB_EVENT_RESIZE 2 #define TB_EVENT_MOUSE 3 /* Possible values for tb_event.key. */ #define TB_KEY_F1 (0xFFFF-0) #define TB_KEY_F2 (0xFFFF-1) #define TB_KEY_F3 (0xFFFF-2) #define TB_KEY_F4 (0xFFFF-3) #define TB_KEY_F5 (0xFFFF-4) #define TB_KEY_F6 (0xFFFF-5) #define TB_KEY_F7 (0xFFFF-6) #define TB_KEY_F8 (0xFFFF-7) #define TB_KEY_F9 (0xFFFF-8) #define TB_KEY_F10 (0xFFFF-9) #define TB_KEY_F11 (0xFFFF-10) #define TB_KEY_F12 (0xFFFF-11) #define TB_KEY_INSERT (0xFFFF-12) #define TB_KEY_DELETE (0xFFFF-13) #define TB_KEY_HOME (0xFFFF-14) #define TB_KEY_END (0xFFFF-15) #define TB_KEY_PGUP (0xFFFF-16) #define TB_KEY_PGDN (0xFFFF-17) #define TB_KEY_ARROW_UP (0xFFFF-18) #define TB_KEY_ARROW_DOWN (0xFFFF-19) #define TB_KEY_ARROW_LEFT (0xFFFF-20) #define TB_KEY_ARROW_RIGHT (0xFFFF-21) #define TB_KEY_MOUSE_LEFT (0xFFFF-22) #define TB_KEY_MOUSE_RIGHT (0xFFFF-23) #define TB_KEY_MOUSE_MIDDLE (0xFFFF-24) #define TB_KEY_MOUSE_RELEASE (0xFFFF-25) #define TB_KEY_MOUSE_WHEEL_UP (0xFFFF-26) #define TB_KEY_MOUSE_WHEEL_DOWN (0xFFFF-27) #define TB_KEY_START_PASTE (0xFFFF-28) #define TB_KEY_END_PASTE (0xFFFF-29) #define TB_KEY_CTRL_ARROW_UP (0xFFFF-30) #define TB_KEY_CTRL_ARROW_DOWN (0xFFFF-31) #define TB_KEY_CTRL_ARROW_LEFT (0xFFFF-32) #define TB_KEY_CTRL_ARROW_RIGHT (0xFFFF-33) #define TB_KEY_SHIFT_TAB (0xFFFF-34) /* Names for some of the possible values for tb_event.ch. */ /* These are all ASCII code points below SPACE character and a BACKSPACE key. */ #define TB_KEY_CTRL_TILDE 0x00 #define TB_KEY_CTRL_2 0x00 /* clash with 'CTRL_TILDE' */ #define TB_KEY_CTRL_A 0x01 #define TB_KEY_CTRL_B 0x02 #define TB_KEY_CTRL_C 0x03 #define TB_KEY_CTRL_D 0x04 #define TB_KEY_CTRL_E 0x05 #define TB_KEY_CTRL_F 0x06 #define TB_KEY_CTRL_G 0x07 #define TB_KEY_BACKSPACE 0x08 #define TB_KEY_CTRL_H 0x08 /* clash with 'CTRL_BACKSPACE' */ #define TB_KEY_TAB 0x09 #define TB_KEY_CTRL_I 0x09 /* clash with 'TAB' */ #define TB_KEY_CTRL_J 0x0A #define TB_KEY_CTRL_K 0x0B #define TB_KEY_CTRL_L 0x0C #define TB_KEY_ENTER 0x0D #define TB_KEY_CTRL_M 0x0D /* clash with 'ENTER' */ #define TB_KEY_CTRL_N 0x0E #define TB_KEY_CTRL_O 0x0F #define TB_KEY_CTRL_P 0x10 #define TB_KEY_CTRL_Q 0x11 #define TB_KEY_CTRL_R 0x12 #define TB_KEY_CTRL_S 0x13 #define TB_KEY_CTRL_T 0x14 #define TB_KEY_CTRL_U 0x15 #define TB_KEY_CTRL_V 0x16 #define TB_KEY_CTRL_W 0x17 #define TB_KEY_CTRL_X 0x18 #define TB_KEY_CTRL_Y 0x19 #define TB_KEY_CTRL_Z 0x1A #define TB_KEY_ESC 0x1B #define TB_KEY_CTRL_LSQ_BRACKET 0x1B /* clash with 'ESC' */ #define TB_KEY_CTRL_3 0x1B /* clash with 'ESC' */ #define TB_KEY_CTRL_4 0x1C #define TB_KEY_CTRL_BACKSLASH 0x1C /* clash with 'CTRL_4' */ #define TB_KEY_CTRL_5 0x1D #define TB_KEY_CTRL_RSQ_BRACKET 0x1D /* clash with 'CTRL_5' */ #define TB_KEY_CTRL_6 0x1E #define TB_KEY_CTRL_7 0x1F #define TB_KEY_CTRL_SLASH 0x1F /* clash with 'CTRL_7' */ #define TB_KEY_CTRL_UNDERSCORE 0x1F /* clash with 'CTRL_7' */ #define TB_KEY_SPACE 0x20 #define TB_KEY_BACKSPACE2 0x7F #define TB_KEY_CTRL_8 0x7F /* clash with 'DELETE' */ /* These are non-existing ones. * * #define TB_KEY_CTRL_1 clash with '1' * #define TB_KEY_CTRL_9 clash with '9' * #define TB_KEY_CTRL_0 clash with '0' */ /* Some aliases */ #define TB_KEY_NEWLINE TB_KEY_CTRL_J #define TB_KEY_CARRIAGE_RETURN TB_KEY_CTRL_M /* Wait for an event up to 'timeout' milliseconds and fill the 'event' * structure with it, when the event is available. Returns the type of the * event (one of TB_EVENT_* constants) or -1 if there was an error or 0 in case * there were no event during 'timeout' period. */ int tb_peek_event(struct tb_event *event, int timeout); /* Wait for an event forever and fill the 'event' structure with it, when the * event is available. Returns the type of the event (one of TB_EVENT_* * constants) or -1 if there was an error. */ int tb_poll_event(struct tb_event *event); int tb_event_ready(void); /*** 3. Utility utf8 functions. */ #define TB_EOF -1 int tb_utf8_char_length(char c); int tb_utf8_char_to_unicode(uint32_t *out, const char *c); int tb_utf8_unicode_to_char(char *out, uint32_t c); const char* to_unicode(uint32_t c); #ifdef __cplusplus } #endif