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

/* static */

static Client *
nexttiled(Client *c) {
	for(c = getnext(c); c && c->isfloat; c = getnext(c->next));
	return c;
}

static void
togglemax(Client *c) {
	XEvent ev;
		
	if(c->isfixed)
		return;

	if((c->ismax = !c->ismax)) {
		c->rx = c->x; c->x = wax;
		c->ry = c->y; c->y = way;
		c->rw = c->w; c->w = waw - 2 * BORDERPX;
		c->rh = c->h; c->h = wah - 2 * BORDERPX;
	}
	else {
		c->x = c->rx;
		c->y = c->ry;
		c->w = c->rw;
		c->h = c->rh;
	}
	resize(c, True, TopLeft);
	while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
}

/* extern */

void (*arrange)(void) = DEFMODE;

void
detach(Client *c) {
	if(c->prev)
		c->prev->next = c->next;
	if(c->next)
		c->next->prev = c->prev;
	if(c == clients)
		clients = c->next;
	c->next = c->prev = NULL;
}

void
dofloat(void) {
	Client *c;

	for(c = clients; c; c = c->next) {
		if(isvisible(c)) {
			resize(c, True, TopLeft);
		}
		else
			ban(c);
	}
	if(!sel || !isvisible(sel)) {
		for(c = stack; c && !isvisible(c); c = c->snext);
		focus(c);
	}
	restack();
}

void
dotile(void) {
	unsigned int i, n, mpx, stackw, th;
	Client *c;

	for(n = 0, c = nexttiled(clients); c; c = nexttiled(c->next))
		n++;
	mpx = (waw * master) / 1000;
	stackw = waw - mpx;

	for(i = 0, c = clients; c; c = c->next)
		if(isvisible(c)) {
			if(c->isfloat) {
				resize(c, True, TopLeft);
				continue;
			}
			c->ismax = False;
			c->x = wax;
			c->y = way;
			if(n == 1) { /* only 1 window */
				c->w = waw - 2 * BORDERPX;
				c->h = wah - 2 * BORDERPX;
			}
			else if(i == 0) { /* master window */
				c->w = mpx - 2 * BORDERPX;
				c->h = wah - 2 * BORDERPX;
				th = wah / (n - 1);
			}
			else {  /* tile window */
				c->x += mpx;
				c->w = stackw - 2 * BORDERPX;
				if(th > bh) {
					c->y += (i - 1) * th;
					c->h = th - 2 * BORDERPX;
				}
				else /* fallback if th < bh */
					c->h = wah - 2 * BORDERPX;
			}
			resize(c, False, TopLeft);
			i++;
		}
		else
			ban(c);

	if(!sel || !isvisible(sel)) {
		for(c = stack; c && !isvisible(c); c = c->snext);
		focus(c);
	}
	restack();
}

void
focusnext(Arg *arg) {
	Client *c;
   
	if(!sel)
		return;
	if(!(c = getnext(sel->next)))
		c = getnext(clients);
	if(c) {
		focus(c);
		restack();
	}
}

void
focusprev(Arg *arg) {
	Client *c;

	if(!sel)
		return;
	if(!(c = getprev(sel->prev))) {
		for(c = clients; c && c->next; c = c->next);
		c = getprev(c);
	}
	if(c) {
		focus(c);
		restack();
	}
}

Bool
isvisible(Client *c) {
	unsigned int i;

	for(i = 0; i < ntags; i++)
		if(c->tags[i] && seltag[i])
			return True;
	return False;
}

void
resizemaster(Arg *arg) {
	if(arg->i == 0)
		master = MASTER;
	else {
		if(master + arg->i > 950 || master + arg->i < 50)
			return;
		master += arg->i;
	}
	arrange();
}

void
restack(void) {
	Client *c;
	XEvent ev;

	if(!sel) {
		drawstatus();
		return;
	}
	if(sel->isfloat || arrange == dofloat) {
		XRaiseWindow(dpy, sel->win);
		XRaiseWindow(dpy, sel->twin);
	}
	if(arrange != dofloat) {
		if(!sel->isfloat) {
			XLowerWindow(dpy, sel->twin);
			XLowerWindow(dpy, sel->win);
		}
		for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
			if(c == sel)
				continue;
			XLowerWindow(dpy, c->twin);
			XLowerWindow(dpy, c->win);
		}
	}
	drawall();
	XSync(dpy, False);
	while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
}

void
togglefloat(Arg *arg) {
	if (!sel || arrange == dofloat)
		return;
	sel->isfloat = !sel->isfloat;
	arrange();
}

void
togglemode(Arg *arg) {
	arrange = (arrange == dofloat) ? dotile : dofloat;
	if(sel)
		arrange();
	else
		drawstatus();
}

void
toggleview(Arg *arg) {
	unsigned int i;

	seltag[arg->i] = !seltag[arg->i];
	for(i = 0; i < ntags && !seltag[i]; i++);
	if(i == ntags)
		seltag[arg->i] = True; /* cannot toggle last view */
	arrange();
}

void
view(Arg *arg) {
	unsigned int i;

	for(i = 0; i < ntags; i++)
		seltag[i] = (arg->i == -1) ? True : False;
	if(arg->i >= 0 && arg->i < ntags)
		seltag[arg->i] = True;
	arrange();
}

void
zoom(Arg *arg) {
	unsigned int n;
	Client *c;

	if(!sel)
		return;
	if(sel->isfloat || (arrange == dofloat)) {
		togglemax(sel);
		return;
	}
	for(n = 0, c = clients; c; c = c->next)
		if(isvisible(c) && !c->isfloat)
			n++;
	if(n < 2 || (arrange == dofloat))
		return;
	if((c = sel) == nexttiled(clients))
		if(!(c = nexttiled(c->next)))
			return;
	detach(c);
	if(clients)
		clients->prev = c;
	c->next = clients;
	clients = c;
	focus(c);
	arrange();
}
sters 51/push-ecx # eax = false b8/copy-to-eax 0/imm32/false $handle-equal?:compare-alloc-id: # ecx = a->alloc_id 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 1/r32/ecx 8/disp8 . # copy *(ebp+8) to ecx # if (ecx != b->alloc_id) return false 39/compare 1/mod/*+disp8 5/rm32/ebp . . . 1/r32/ecx 0x10/disp8 . # compare ecx and *(ebp+16) 75/jump-if-!= $handle-equal?:end/disp8 $handle-equal?:compare-address: # ecx = handle->address 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 1/r32/ecx 0xc/disp8 . # copy *(ebp+12) to ecx # if (ecx != b->address) return false 39/compare 1/mod/*+disp8 5/rm32/ebp . . . 1/r32/ecx 0x14/disp8 . # compare ecx and *(ebp+20) 75/jump-if-!= $handle-equal?:end/disp8 $handle-equal?:return-true: # return true b8/copy-to-eax 1/imm32/true $handle-equal?:end: # . restore registers 59/pop-to-ecx # . epilogue 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp 5d/pop-to-ebp c3/return copy-handle: # src: (handle _T), dest: (addr handle _T) # . prologue 55/push-ebp 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp # . save registers 50/push-eax 51/push-ecx # ecx = dest 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 1/r32/ecx 0x10/disp8 . # copy *(ebp+16) to ecx # *dest = src 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 0/r32/eax 8/disp8 . # copy *(ebp+8) to eax 89/copy 0/mod/indirect 1/rm32/ecx . . . 0/r32/eax . . # copy eax to *ecx 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 0/r32/eax 0xc/disp8 . # copy *(ebp+12) to eax 89/copy 1/mod/*+disp8 1/rm32/ecx . . . 0/r32/eax 4/disp8 . # copy eax to *(ecx+4) $copy-handle:end: # . restore registers 59/pop-to-ecx 58/pop-to-eax # . epilogue 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp 5d/pop-to-ebp c3/return # helper: create a nested allocation descriptor (useful for tests) allocate-region: # ad: (addr allocation-descriptor), n: int, out: (addr handle allocation-descriptor) # . prologue 55/push-ebp 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp # . save registers 50/push-eax 51/push-ecx # allocate(ad, n, out) # . . push args ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0x10/disp8 . # push *(ebp+16) ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12) ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) # . . call e8/call allocate/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp # eax = out->payload 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 0/r32/eax 0x10/disp8 . # copy *(ebp+16) to eax 8b/copy 1/mod/*+disp8 0/rm32/eax . . . 0/r32/eax 4/disp8 . # copy *(eax+4) to eax # skip payload->allocid 05/add-to-eax 4/imm32 # if (eax == 0) abort 3d/compare-eax-and 0/imm32 74/jump-if-= $allocate-region:abort/disp8 # earmark 8 bytes at the start for a new allocation descriptor # . *eax = eax + 8 89/copy 3/mod/direct 1/rm32/ecx . . . 0/r32/eax . . # copy eax to ecx 81 0/subop/add 3/mod/direct 1/rm32/ecx . . . . . 8/imm32 # add to ecx 89/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy ecx to *eax # . *(eax+4) = eax + n 89/copy 3/mod/direct 1/rm32/ecx . . . 0/r32/eax . . # copy eax to ecx 03/add 1/mod/*+disp8 5/rm32/ebp . . . 1/r32/ecx 0xc/disp8 . # add *(ebp+12) to ecx 89/copy 1/mod/*+disp8 0/rm32/eax . . . 1/r32/ecx 4/disp8 . # copy ecx to *(eax+4) # . restore registers 59/pop-to-ecx 58/pop-to-eax # . epilogue 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp 5d/pop-to-ebp c3/return # We could create a more general '$abort' jump target, but then we'd need to do # a conditional jump followed by loading the error message and an unconditional # jump. Or we'd need to unconditionally load the error message before a # conditional jump, even if it's unused the vast majority of the time. This way # we bloat a potentially cold segment in RAM so we can abort with a single # instruction. $allocate-region:abort: (abort "allocate-region: failed to allocate") # never gets here # Claim the next 'n+4' bytes of memory and initialize the first 4 to n. # Abort if there isn't enough memory in 'ad'. allocate-array: # ad: (addr allocation-descriptor), n: int, out: (addr handle _) # . prologue 55/push-ebp 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp # . save registers 50/push-eax 51/push-ecx 52/push-edx # ecx = n 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 1/r32/ecx 0xc/disp8 . # copy *(ebp+12) to ecx # var size/edx: int = n+4 8d/copy-address 1/mod/*+disp8 1/rm32/ecx . . . 2/r32/edx 4/disp8 . # copy ecx+4 to edx # allocate(ad, size, out) # . . push args ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0x10/disp8 . # push *(ebp+16) 52/push-edx ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) # . . call e8/call allocate/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp # *out->payload = n 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 0/r32/eax 0x10/disp8 . # copy *(ebp+16) to eax 8b/copy 1/mod/*+disp8 0/rm32/eax . . . 0/r32/eax 4/disp8 . # copy *(eax+4) to eax # . skip payload->allocid 05/add-to-eax 4/imm32 # . 89/copy 0/mod/indirect 0/rm32/eax . . . 1/r32/ecx . . # copy ecx to *eax $allocate-array:end: # . restore registers 5a/pop-to-edx 59/pop-to-ecx 58/pop-to-eax # . epilogue 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp 5d/pop-to-ebp c3/return test-allocate-array: # . prologue 55/push-ebp 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp # var ad/ecx: allocation-descriptor containing 16 bytes # . var end/ecx: (addr byte) 89/<- %ecx 4/r32/esp # . var start/edx: (addr byte) = end - 16 81 5/subop/subtract %esp 0x10/imm32 89/<- %edx 4/r32/esp # . ad = {start, end} 51/push-ecx 52/push-edx 89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx # var expected-payload/ebx = ad->curr 8b/copy 0/mod/indirect 1/rm32/ecx . . . 3/r32/ebx . . # copy *ecx to ebx # var h/edx: handle = {0, 0} 68/push 0/imm32 68/push 0/imm32 89/copy 3/mod/direct 2/rm32/edx . . . 4/r32/esp . . # copy esp to edx # *Next-alloc-id = 0x34 c7 0/subop/copy 0/mod/indirect 5/rm32/.disp32 . . . Next-alloc-id/disp32 0x34/imm32 # copy to *Next-alloc-id # allocate-array(ad, 3, h) # . . push args 52/push-edx 68/push 3/imm32 51/push-ecx # . . call e8/call allocate-array/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp # check-ints-equal(h->alloc-id, 0x34, msg) # . . push args 68/push "F - test-allocate-array: sets alloc-id in handle"/imm32 68/push 0x34/imm32 ff 6/subop/push 0/mod/indirect 2/rm32/edx . . . . . . # push *edx # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp # check-ints-equal(h->payload, expected-payload, msg) # . . push args 68/push "F - test-allocate-array: sets payload in handle"/imm32 53/push-ebx ff 6/subop/push 1/mod/*+disp8 2/rm32/edx . . . . 4/disp8 . # push *(edx+4) # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp # check-ints-equal(h->payload->alloc-id, 0x34, msg) # . . push args 68/push "F - test-allocate-array: sets alloc-id in payload"/imm32 68/push 0x34/imm32 ff 6/subop/push 0/mod/indirect 3/rm32/ebx . . . . . . # push *ebx # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp # check-ints-equal(h->payload->size, 3, msg) # . . push args 68/push "F - test-allocate-array: sets array size in payload"/imm32 68/push 3/imm32 ff 6/subop/push 1/mod/*+disp8 3/rm32/ebx . . . . 4/disp8 . # push *(ebx+4) # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp # check-ints-equal(*Next-alloc-id, 0x35, msg) # . . push args 68/push "F - test-allocate-array: increments Next-alloc-id"/imm32 68/push 0x35/imm32 ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Next-alloc-id/disp32 # push *Next-alloc-id # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp # check-ints-equal(ad->curr - expected-payload, 3 + 4 for alloc-id + 4 for array size, msg) # . . push args 68/push "F - test-allocate-array: updates allocation descriptor"/imm32 68/push 0xb/imm32 8b/copy 0/mod/indirect 1/rm32/ecx . . . 0/r32/eax . . # copy *ecx to eax 29/subtract 3/mod/direct 0/rm32/eax . . . 3/r32/ebx . . # subtract ebx from eax 50/push-eax # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp # clean up c7 0/subop/copy 0/mod/indirect 5/rm32/.disp32 . . . Next-alloc-id/disp32 1/imm32 # copy to *Next-alloc-id # . reclaim locals 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x20/imm32 # add to esp # . epilogue 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp 5d/pop-to-ebp c3/return copy-array: # ad: (addr allocation-descriptor), src: (addr array _T), out: (addr handle array _T) # . prologue 55/push-ebp 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp # . save registers 50/push-eax 51/push-ecx 52/push-edx 56/push-esi # esi = src 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 6/r32/esi 0xc/disp8 . # copy *(ebp+12) to esi # var size/ecx: int = src->size+4 8b/copy 0/mod/indirect 6/rm32/esi . . . 1/r32/ecx . . # copy *esi to ecx 81 0/subop/add 3/mod/direct 1/rm32/ecx . . . . . 4/imm32 # add to ecx # allocate(ad, size, out) # . . push args ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0x10/disp8 . # push *(ebp+16) 51/push-ecx ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8) # . . call e8/call allocate/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp # var payload/eax: (addr byte) = out->payload 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 0/r32/eax 0x10/disp8 . # copy *(ebp+16) to eax 8b/copy 1/mod/*+disp8 0/rm32/eax . . . 0/r32/eax 4/disp8 . # copy *(eax+4) to eax # . skip payload->allocid 05/add-to-eax 4/imm32 # var max/ecx: (addr byte) = payload + size 01/add 3/mod/direct 1/rm32/ecx . . . 0/r32/eax . . # add eax to ecx # _append-4(payload, max, src, &src->data[src->size]) # . . push &src->data[src->size] 8b/copy 0/mod/indirect 6/rm32/esi . . . 2/r32/edx . . # copy *esi to edx 8d/copy-address 1/mod/*+disp8 4/rm32/sib 6/base/esi 2/index/edx . 2/r32/edx 4/disp8 . # copy esi+edx+4 to edx 52/push-edx # . . push src 56/push-esi # . . push max 51/push-ecx # . . push payload 50/push-eax # . . call e8/call _append-4/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x10/imm32 # add to esp $copy-array:end: # . restore registers 5e/pop-to-esi 5a/pop-to-edx 59/pop-to-ecx 58/pop-to-eax # . epilogue 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp 5d/pop-to-ebp c3/return test-copy-array: # . prologue 55/push-ebp 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp # var src/esi: (addr array int) = [3, 4, 5] 68/push 5/imm32 68/push 4/imm32 68/push 3/imm32 68/push 0xc/imm32/size 89/copy 3/mod/direct 6/rm32/esi . . . 4/r32/esp . . # copy esp to esi # var ad/ecx: allocation-descriptor containing 32 bytes # . var end/ecx: (addr byte) 89/<- %ecx 4/r32/esp # . var start/edx: (addr byte) = end - 32 81 5/subop/subtract %esp 0x20/imm32 89/<- %edx 4/r32/esp # . ad = {start, end} 51/push-ecx 52/push-edx 89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx # var expected-payload/ebx = ad->curr 8b/copy 0/mod/indirect 1/rm32/ecx . . . 3/r32/ebx . . # copy *ecx to ebx # var h/edx: handle = {0, 0} 68/push 0/imm32 68/push 0/imm32 89/copy 3/mod/direct 2/rm32/edx . . . 4/r32/esp . . # copy esp to edx # *Next-alloc-id = 0x34 c7 0/subop/copy 0/mod/indirect 5/rm32/.disp32 . . . Next-alloc-id/disp32 0x34/imm32 # copy to *Next-alloc-id # copy-array(ad, src, h) # . . push args 52/push-edx 56/push-esi 51/push-ecx # . . call e8/call copy-array/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp # check-ints-equal(h->alloc-id, 0x34, msg) # . . push args 68/push "F - test-copy-array: sets alloc-id in handle"/imm32 68/push 0x34/imm32 ff 6/subop/push 0/mod/indirect 2/rm32/edx . . . . . . # push *edx # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp # check-ints-equal(h->payload, expected-payload, msg) # . . push args 68/push "F - test-copy-array: sets payload in handle"/imm32 53/push-ebx ff 6/subop/push 1/mod/*+disp8 2/rm32/edx . . . . 4/disp8 . # push *(edx+4) # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp # check-ints-equal(h->payload->alloc-id, 0x34, msg) # . . push args 68/push "F - test-copy-array: sets alloc-id in payload"/imm32 68/push 0x34/imm32 ff 6/subop/push 0/mod/indirect 2/rm32/edx . . . . . . # push *edx # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp # var payload/eax: (addr int) = lookup(h) # . . push args ff 6/subop/push 1/mod/*+disp8 2/rm32/edx . . . . 4/disp8 . # push *(edx+4) ff 6/subop/push 0/mod/indirect 2/rm32/edx . . . . . . # push *edx # . . call e8/call lookup/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp # check-ints-equal(payload->size, 0xc, msg) # . . push args 68/push "F - test-copy-array: sets array size in payload"/imm32 68/push 0xc/imm32 ff 6/subop/push 0/mod/indirect 0/rm32/eax . . . . . . # push *eax # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp # check-ints-equal(*Next-alloc-id, 0x35, msg) # . . push args 68/push "F - test-copy-array: increments Next-alloc-id"/imm32 68/push 0x35/imm32 ff 6/subop/push 0/mod/indirect 5/rm32/.disp32 . . . Next-alloc-id/disp32 # push *Next-alloc-id # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp # check-ints-equal(ad->curr - expected-payload, 12 + 4 for alloc-id + 4 for size, msg) # . . push args 68/push "F - test-copy-array: updates allocation descriptor"/imm32 68/push 0x14/imm32 8b/copy 0/mod/indirect 1/rm32/ecx . . . 0/r32/eax . . # copy *ecx to eax 29/subtract 3/mod/direct 0/rm32/eax . . . 3/r32/ebx . . # subtract ebx from eax 50/push-eax # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp # clean up c7 0/subop/copy 0/mod/indirect 5/rm32/.disp32 . . . Next-alloc-id/disp32 1/imm32 # copy to *Next-alloc-id # . reclaim locals 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x40/imm32 # add to esp # . epilogue 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp 5d/pop-to-ebp c3/return # Fill a region of memory with zeroes. zero-out: # start: (addr byte), size: int # pseudocode: # curr/esi = start # i/ecx = 0 # while true # if (i >= size) break # *curr = 0 # ++curr # ++i # # . prologue 55/push-ebp 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp # . save registers 50/push-eax 51/push-ecx 52/push-edx 56/push-esi # curr/esi = start 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 6/r32/esi 8/disp8 . # copy *(ebp+8) to esi # var i/ecx: int = 0 31/xor 3/mod/direct 1/rm32/ecx . . . 1/r32/ecx . . # clear ecx # edx = size 8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 2/r32/edx 0xc/disp8 . # copy *(ebp+12) to edx $zero-out:loop: # if (i >= size) break 39/compare 3/mod/direct 1/rm32/ecx . . . 2/r32/edx . . # compare ecx with edx 7d/jump-if->= $zero-out:end/disp8 # *curr = 0 c6 0/subop/copy-byte 0/mod/direct 6/rm32/esi . . . . . 0/imm8 # copy byte to *esi # ++curr 46/increment-esi # ++i 41/increment-ecx eb/jump $zero-out:loop/disp8 $zero-out:end: # . restore registers 5e/pop-to-esi 5a/pop-to-edx 59/pop-to-ecx 58/pop-to-eax # . epilogue 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp 5d/pop-to-ebp c3/return test-zero-out: # . prologue 55/push-ebp 89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp # region/ecx = 34, 35, 36, 37 68/push 0x37363534/imm32 89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx # zero-out(ecx, 3) # . . push args 68/push 3/imm32/size 51/push-ecx # . . call e8/call zero-out/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp # first 3 bytes cleared, fourth left alone # . check-ints-equal(*ecx, 0x37000000, msg) # . . push args 68/push "F - test-zero-out"/imm32 68/push 0x37000000/imm32 ff 6/subop/push 0/mod/indirect 1/rm32/ecx . . . . . . # push *ecx # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp # . reclaim locals 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp # . epilogue 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp 5d/pop-to-ebp c3/return # . . vim:nowrap:textwidth=0