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Fix includebin to use binary mode when emitting the contents of the file. For systems with the stupid distinction between binary and text files (I'm looking at you Windows), actually specify binary mode when reading the include file for a binary include. It worked fine on Linux and other Unix-like systems which treat files as a simple sequence of bytes but on Windows, you get the benefit of 0x1A causing an EOF signal with text mode files which is not helpful.
author William Astle <lost@l-w.ca>
date Sun, 12 Apr 2015 12:11:19 -0600
parents cb24ffb23f7c
children f318407d2469
line wrap: on
line source

/*
pseudo.c
Copyright © 2010 William Astle

This file is part of LWASM.

LWASM is free software: you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation, either version 3 of the License, or (at your option) any later
version.

This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details.

You should have received a copy of the GNU General Public License along with
this program. If not, see <http://www.gnu.org/licenses/>.

*/

#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <stdlib.h>
#include <time.h>

#include <lw_alloc.h>

#include "lwasm.h"
#include "instab.h"
#include "input.h"

#include "lw_string.h"

extern void register_struct_entry(asmstate_t *as, line_t *l, int size, structtab_t *ss);

// for "dts"
PARSEFUNC(pseudo_parse_dts)
{
	time_t tp;
	char *t;
	
	skip_operand(p);
	l -> len = 0;

	tp = time(NULL);
	t = l ->lstr = lw_strdup(ctime(&tp));

	while (*t)
	{
		if (*t == '\n')
			break;
		t++;
		l -> len += 1;
	}
	
}

EMITFUNC(pseudo_emit_dts)
{
	char *t;
	int i;
	
	for (t = l -> lstr, i = 0; i < l -> len; i++, t++)
		lwasm_emit(l, *t);
}

// for "dtb"
PARSEFUNC(pseudo_parse_dtb)
{
	skip_operand(p);
	l -> len = 6;
}

EMITFUNC(pseudo_emit_dtb)
{
	time_t tp;
	struct tm *t;
	
	tp = time(NULL);
	t = localtime(&tp);

	lwasm_emit(l, t -> tm_year);
	lwasm_emit(l, t -> tm_mon + 1);
	lwasm_emit(l, t -> tm_mday);
	lwasm_emit(l, t -> tm_hour);
	lwasm_emit(l, t -> tm_min);
	lwasm_emit(l, t -> tm_sec);
}

// for "end"
PARSEFUNC(pseudo_parse_end)
{
	lw_expr_t addr;
	
	as -> endseen = 1;
	l -> len = 0;
	
	if (as -> output_format != OUTPUT_DECB)
	{
		skip_operand(p);
		return;
	}
	
	if (!**p)
	{
		addr = lw_expr_build(lw_expr_type_int, 0);
	}
	else
	{
		addr = lwasm_parse_expr(as, p);
	}
	if (!addr)
	{
		lwasm_register_error(as, l, "Bad expression");
		addr = lw_expr_build(lw_expr_type_int, 0);
	}
	lwasm_save_expr(l, 0, addr);
}

EMITFUNC(pseudo_emit_end)
{
	lw_expr_t addr;
	
	addr = lwasm_fetch_expr(l, 0);
	
	if (addr)
	{
		if (!lw_expr_istype(addr, lw_expr_type_int))
			lwasm_register_error(as, l, "Exec address not constant!");
		else
			as -> execaddr = lw_expr_intval(addr);
	}
	as -> endseen = 1;
}

PARSEFUNC(pseudo_parse_fcb)
{
	int i = 0;
	lw_expr_t e;
	
	for (;;)
	{
		e = lwasm_parse_expr(as, p);
		if (!e)
		{
			lwasm_register_error(as, l, "Bad expression (#%d)", i);
			break;
		}
		lwasm_save_expr(l, i++, e);
		if (**p != ',')
			break;
		(*p)++;
	}
	
	l -> len = i;
}

EMITFUNC(pseudo_emit_fcb)
{
	int i;
	lw_expr_t e;
//	int v;
	
	for (i = 0; i < l -> len; i++)
	{
		e = lwasm_fetch_expr(l, i);
		lwasm_emitexpr(l, e, 1);
	}
}

PARSEFUNC(pseudo_parse_fdb)
{
	int i = 0;
	lw_expr_t e;
	
	for (;;)
	{
		e = lwasm_parse_expr(as, p);
		if (!e)
		{
			lwasm_register_error(as, l, "Bad expression (#%d)", i);
			break;
		}
		lwasm_save_expr(l, i++, e);
		if (**p != ',')
			break;
		(*p)++;
	}
	
	l -> len = i * 2;
}

EMITFUNC(pseudo_emit_fdb)
{
	int i;
	lw_expr_t e;
//	int v;
	
	for (i = 0; i < (l -> len)/2; i++)
	{
		e = lwasm_fetch_expr(l, i);
		lwasm_emitexpr(l, e, 2);
	}
}

PARSEFUNC(pseudo_parse_fdbs)
{
	int i = 0;
	lw_expr_t e;
	
	for (;;)
	{
		e = lwasm_parse_expr(as, p);
		if (!e)
		{
			lwasm_register_error(as, l, "Bad expression (#%d)", i);
			break;
		}
		lwasm_save_expr(l, i++, e);
		if (**p != ',')
			break;
		(*p)++;
	}
	
	l -> len = i * 2;
}

EMITFUNC(pseudo_emit_fdbs)
{
	int i;
	lw_expr_t e;
	lw_expr_t t;
	lw_expr_t t2;
//	int v;
	
	for (i = 0; i < (l -> len)/2; i++)
	{
		e = lwasm_fetch_expr(l, i);
		t = lw_expr_build(lw_expr_type_int, 256);
		t2 = lw_expr_build(lw_expr_type_oper, lw_expr_oper_divide, e, t);
		lwasm_reduce_expr(as, t2);
		lw_expr_destroy(t);
		lwasm_emitexpr(l, e, 1);
		lwasm_emitexpr(l, t2, 1);
		lw_expr_destroy(t2);
	}
}

PARSEFUNC(pseudo_parse_fqb)
{
	int i = 0;
	lw_expr_t e;
	
	for (;;)
	{
		e = lwasm_parse_expr(as, p);
		if (!e)
		{
			lwasm_register_error(as, l, "Bad expression (#%d)", i);
			break;
		}
		lwasm_save_expr(l, i++, e);
		if (**p != ',')
			break;
		(*p)++;
	}
	
	l -> len = i * 4;
}

EMITFUNC(pseudo_emit_fqb)
{
	int i;
	lw_expr_t e;
//	int v;
	
	for (i = 0; i < (l -> len)/4; i++)
	{
		e = lwasm_fetch_expr(l, i);
		lwasm_emitexpr(l, e, 4);
	}
}

static int cstringlen(asmstate_t *as, line_t *ln, char **p, char delim)
{
	int l = 0;
	char *str = NULL;
	int blen = 0;
	int bsize = 0;
	
	if (!(as -> pragmas & PRAGMA_CESCAPES))
	{
		for (; **p && **p != delim; (*p)++)
		{
			l++;
			if (blen >= bsize)
			{
				str = lw_realloc(str, bsize + 32);
				bsize++;
			}
			str[blen++] = **p;
		}
	}
	else
	{
		while (**p && **p != delim)
		{
			int wch = **p;
			if (**p == '\\')
			{
				/* escape sequence */

				(*p)++;
				if (!**p)
					break;

				switch (**p)
				{
					/* octal sequence or NUL */
					/* skip the "0", then skip up to two more digits */
				case '0':
				case '1':
				case '2':
				case '3':
					wch = **p;
					wch -= 0x30;
					if ((*p)[1] >= '0' && (*p)[1] < '8')
					{
						(*p)++;
						wch *= 8;
						wch += **p - 0x30;
					}
					if ((*p)[1] >= '0' && (*p)[1] < '8')
					{
						(*p)++;
						wch *= 8;
						wch += **p -0x30;
					}
					break;			

				/* hexadecimal value */
				case 'x':
					(*p)++;			// ignore "x"
					wch = 0;
					if (**p)		// skip digit 1
					{
						wch = **p - 0x30;
						if (wch > 9)
							wch -= 7;
						if (wch > 9)
							wch -= 32;
						(*p)++;
					}
					if (**p)
					{
						int i;
						i = **p - 0x30;
						if (i > 9)
							i -= 7;
						if (i > 9)
							i -= 32;
						wch = wch * 16 + i;
					}
					break;

				case 'a':
					wch = 7;
					break;
				
				case 'b':
					wch = 8;
					break;
				
				case 't':
					wch = 9;
					break;
				
				case 'n':
					wch = 10;
					break;
				
				case 'v':
					wch = 11;
					break;
				
				case 'f':
					wch = 12;
					break;
				
				case 'r':
					wch = 13;
				
				/* everything else represents itself */
				default:
					break;
				}
			}
			/* now "wch" is the character to write out */
			l++;
			(*p)++;
			if (blen >= bsize)
			{
				str = lw_realloc(str, bsize + 32);
				bsize += 32;
			}
			str[blen++] = wch;
		}
	}
	/* do something with the string here */
	/* l is the string length, str is the string itself */
	ln -> lstr = str;
	return l;
}

PARSEFUNC(pseudo_parse_fcc)
{
	char delim;
	int i;
	
	if (!**p)
	{
		lwasm_register_error(as, l, "Bad operand");
		return;
	}
	
	delim = **p;
	(*p)++;
	
	
	i = cstringlen(as, l, p, delim);
	
	if (**p != delim)
	{
		lwasm_register_error(as, l, "Bad operand");
		return;
	}
	(*p)++;	
	l -> len = i;
}

EMITFUNC(pseudo_emit_fcc)
{
	int i;
	
	for (i = 0; i < l -> len; i++)
		lwasm_emit(l, l -> lstr[i]);
}

PARSEFUNC(pseudo_parse_fcs)
{
	char delim;
	int i;
	
	if (!**p)
	{
		lwasm_register_error(as, l, "Bad operand");
		return;
	}
	
	delim = **p;
	(*p)++;
	
	i = cstringlen(as, l, p, delim);
	
	if (**p != delim)
	{
		lwasm_register_error(as, l, "Bad operand");
		return;
	}
	(*p)++;
	l -> len = i;
}

EMITFUNC(pseudo_emit_fcs)
{
	int i;
	
	for (i = 0; i < l -> len - 1; i++)
		lwasm_emit(l, l -> lstr[i]);
	lwasm_emit(l, l -> lstr[i] | 0x80);
}

PARSEFUNC(pseudo_parse_fcn)
{
	char delim;
	int i;
	
	if (!**p)
	{
		lwasm_register_error(as, l, "Bad operand");
		return;
	}
	
	delim = **p;
	(*p)++;
	
	i = cstringlen(as, l, p, delim);

	if (**p != delim)
	{
		lwasm_register_error(as, l, "Bad operand");
		return;
	}
	(*p)++;
	l -> len = i + 1;
}

EMITFUNC(pseudo_emit_fcn)
{
	int i;
	
	for (i = 0; i < (l -> len - 1); i++)
		lwasm_emit(l, l -> lstr[i]);
	lwasm_emit(l, 0);
}

PARSEFUNC(pseudo_parse_rmb)
{
	lw_expr_t expr;
	
	expr = lwasm_parse_expr(as, p);
	if (!expr)
	{
		lwasm_register_error(as, l, "Bad expression");
	}

	l -> lint = 0;
	if (as -> instruct)
	{
		lwasm_reduce_expr(as, expr);
		if (!lw_expr_istype(expr, lw_expr_type_int))
		{
			lwasm_register_error(as, l, "Expression must be constant at parse time");
		}
		else
		{
			int e;
			e = lw_expr_intval(expr);
			register_struct_entry(as, l, e, NULL);
			l -> len = 0;
			l -> lint = 1;
			l -> symset = 1;
		}
	}
	else
	{
		if (l -> inmod)
		{
			l -> dlen = -1;
			l -> len = 0;
		}
	}
	lwasm_save_expr(l, 0, expr);
}

RESOLVEFUNC(pseudo_resolve_rmb)
{
	lw_expr_t expr;
	
	if (l -> lint)
		return;
	
	if (l -> inmod)
	{
		if (l -> dlen >= 0)
			return;
	}
	else
	{
		if (l -> len >= 0)
			return;
	}
			
	expr = lwasm_fetch_expr(l, 0);
	
	if (lw_expr_istype(expr, lw_expr_type_int))
	{
		if (lw_expr_intval(expr) < 0)
		{
			lwasm_register_error(as, l, "Negative reservation sizes make no sense! (%d)", lw_expr_intval(expr));
			l -> len = 0;
			l -> dlen = 0;
			return;
		}
		if (l -> inmod)
			l -> dlen = lw_expr_intval(expr);
		else
			l -> len = lw_expr_intval(expr);
	}
}

EMITFUNC(pseudo_emit_rmb)
{
	if (l -> lint)
		return;

	if (l -> len < 0 || l -> dlen < 0)
		lwasm_register_error(as, l, "Expression not constant: %d %d", l -> len, l -> dlen);
}

PARSEFUNC(pseudo_parse_rmd)
{
	lw_expr_t expr;
	
	l -> lint = 0;
	expr = lwasm_parse_expr(as, p);
	if (!expr)
	{
		lwasm_register_error(as, l, "Bad expression");
	}
	
	if (as -> instruct)
	{
		lwasm_reduce_expr(as, expr);
		if (!lw_expr_istype(expr, lw_expr_type_int))
		{
			lwasm_register_error(as, l, "Expression must be constant at parse time");
		}
		else
		{
			int e;
			e = lw_expr_intval(expr) * 2;
			register_struct_entry(as, l, e, NULL);
			l -> len = 0;
			l -> symset = 1;
			l -> lint = 1;
		}
	}
	else
	{
		if (l -> inmod)
		{
			l -> dlen = -1;
			l -> len = 0;
		}
	}
	lwasm_save_expr(l, 0, expr);
}

RESOLVEFUNC(pseudo_resolve_rmd)
{
	lw_expr_t expr;
	
	if (l -> lint)
		return;
	
	if (l -> inmod)
	{
		if (l -> dlen >= 0)
			return;
	}
	else
	{
		if (l -> len >= 0)
			return;
	}
	
	expr = lwasm_fetch_expr(l, 0);
	
	if (lw_expr_istype(expr, lw_expr_type_int))
	{
		if (lw_expr_intval(expr) < 0)
		{
			lwasm_register_error(as, l, "Negative reservation sizes make no sense! (%d)", lw_expr_intval(expr));
			l -> len = 0;
			l -> dlen = 0;
			return;
		}
		if (l -> inmod)
			l -> dlen = lw_expr_intval(expr) * 2;
		else
			l -> len = lw_expr_intval(expr) * 2;
	}
}

EMITFUNC(pseudo_emit_rmd)
{
	if (l -> lint)
		return;

	if (l -> len < 0 || l -> dlen < 0)
		lwasm_register_error(as, l, "Expression not constant");
}


PARSEFUNC(pseudo_parse_rmq)
{
	lw_expr_t expr;
	
	l -> lint = 0;
	expr = lwasm_parse_expr(as, p);
	if (!expr)
	{
		lwasm_register_error(as, l, "Bad expression");
	}
	if (as -> instruct)
	{
		lwasm_reduce_expr(as, expr);
		if (!lw_expr_istype(expr, lw_expr_type_int))
		{
			lwasm_register_error(as, l, "Expression must be constant at parse time");
		}
		else
		{
			int e;
			e = lw_expr_intval(expr) * 4;
			register_struct_entry(as, l, e, NULL);
			l -> len = 0;
			l -> symset = 1;
			l -> lint = 1;
		}
	}
	else
	{
		if (as -> inmod)
		{
			l -> dlen = -1;
			l -> len = 0;
		}
	}
	lwasm_save_expr(l, 0, expr);
}

RESOLVEFUNC(pseudo_resolve_rmq)
{
	lw_expr_t expr;

	if (l -> lint)
		return;
	
	if (l -> inmod)
	{
		if (l -> dlen >= 0)
			return;
	}
	else
	{
		if (l -> len >= 0)
			return;
	}
	
	expr = lwasm_fetch_expr(l, 0);
	
	if (lw_expr_istype(expr, lw_expr_type_int))
	{
		if (lw_expr_intval(expr) < 0)
		{
			lwasm_register_error(as, l, "Negative reservation sizes make no sense! (%d)", lw_expr_intval(expr));
			l -> len = 0;
			l -> dlen = 0;
			return;
		}
		if (l -> inmod)
			l -> dlen = lw_expr_intval(expr) * 4;
		else 
			l -> len = lw_expr_intval(expr) * 4;
	}
}

EMITFUNC(pseudo_emit_rmq)
{
	if (l -> lint)
		return;

	if (l -> len < 0 || l -> dlen < 0)
		lwasm_register_error(as, l, "Expression not constant");
}


PARSEFUNC(pseudo_parse_zmq)
{
	lw_expr_t expr;
	
	expr = lwasm_parse_expr(as, p);
	if (!expr)
	{
		lwasm_register_error(as, l, "Bad expression");
	}
	
	lwasm_save_expr(l, 0, expr);
}

RESOLVEFUNC(pseudo_resolve_zmq)
{
	lw_expr_t expr;
	
	if (l -> len >= 0)
		return;
	
	expr = lwasm_fetch_expr(l, 0);
	
	if (lw_expr_istype(expr, lw_expr_type_int))
	{
		if (lw_expr_intval(expr) < 0)
		{
			lwasm_register_error(as, l, "Negative block sizes make no sense! (%d)", lw_expr_intval(expr));
			l -> len = 0;
			return;
		}
		l -> len = lw_expr_intval(expr) * 4;
	}
}

EMITFUNC(pseudo_emit_zmq)
{
	int i;

	if (l -> len < 0)
	{
		lwasm_register_error(as, l, "Expression not constant");
		return;
	}

	for (i = 0; i < l -> len; i++)
		lwasm_emit(l, 0);	
}


PARSEFUNC(pseudo_parse_zmd)
{
	lw_expr_t expr;
	
	expr = lwasm_parse_expr(as, p);
	if (!expr)
	{
		lwasm_register_error(as, l, "Bad expression");
	}
	
	lwasm_save_expr(l, 0, expr);
}

RESOLVEFUNC(pseudo_resolve_zmd)
{
	lw_expr_t expr;
	
	if (l -> len >= 0)
		return;
	
	expr = lwasm_fetch_expr(l, 0);
	
	if (lw_expr_istype(expr, lw_expr_type_int))
	{
		if (lw_expr_intval(expr) < 0)
		{
			lwasm_register_error(as, l, "Negative block sizes make no sense! (%d)", lw_expr_intval(expr));
			l -> len = 0;
			return;
		}
		l -> len = lw_expr_intval(expr) * 2;
	}
}

EMITFUNC(pseudo_emit_zmd)
{
	int i;

	if (l -> len < 0)
	{
		lwasm_register_error(as, l, "Expression not constant");
		return;
	}

	for (i = 0; i < l -> len; i++)
		lwasm_emit(l, 0);	
}

PARSEFUNC(pseudo_parse_zmb)
{
	lw_expr_t expr;
	
	expr = lwasm_parse_expr(as, p);
	if (!expr)
	{
		lwasm_register_error(as, l, "Bad expression");
	}
	
	lwasm_save_expr(l, 0, expr);
}

RESOLVEFUNC(pseudo_resolve_zmb)
{
	lw_expr_t expr;
	
	if (l -> len >= 0)
		return;
	
	expr = lwasm_fetch_expr(l, 0);
	
	if (lw_expr_istype(expr, lw_expr_type_int))
	{
		if (lw_expr_intval(expr) < 0)
		{
			lwasm_register_error(as, l, "Negative block sizes make no sense! (%d)", lw_expr_intval(expr));
			l -> len = 0;
			return;
		}
		l -> len = lw_expr_intval(expr);
	}
}

EMITFUNC(pseudo_emit_zmb)
{
	int i;

	if (l -> len < 0)
	{
		lwasm_register_error(as, l, "Expression not constant");
		return;
	}

	for (i = 0; i < l -> len; i++)
		lwasm_emit(l, 0);	
}

PARSEFUNC(pseudo_parse_org)
{
	lw_expr_t e;
	
	l -> len = 0;
	
	e = lwasm_parse_expr(as, p);
	if (!e)
	{
		lwasm_register_error(as, l, "Bad operand");
		return;
	}
	
	lw_expr_destroy(l -> daddr);
	l -> daddr = e;
	
	if (l -> inmod == 0)
	{
		lw_expr_destroy(l -> addr);
		l -> addr = e;
	}
	l -> len = 0;
}

PARSEFUNC(pseudo_parse_equ)
{
	lw_expr_t e;
	
	l -> len = 0;
	
	if (!(l -> sym))
	{
		lwasm_register_error(as, l, "Missing symbol");
		return;
	}
	
	e = lwasm_parse_expr(as, p);
	if (!e)
	{
		lwasm_register_error(as, l, "Bad operand");
		return;
	}
	
	register_symbol(as, l, l -> sym, e, symbol_flag_none);
	l -> symset = 1;
	l -> dptr = lookup_symbol(as, l, l -> sym);
	lw_expr_destroy(e);
}

PARSEFUNC(pseudo_parse_set)
{
	lw_expr_t e;
	
	l -> len = 0;
	
	if (!(l -> sym))
	{
		lwasm_register_error(as, l, "Missing symbol");
		return;
	}
	
	e = lwasm_parse_expr(as, p);
	if (!e)
	{
		lwasm_register_error(as, l, "Bad operand");
		return;
	}
	
	register_symbol(as, l, l -> sym, e, symbol_flag_set);
	l -> symset = 1;
	l -> dptr = lookup_symbol(as, l, l -> sym);
	lw_expr_destroy(e);
}

PARSEFUNC(pseudo_parse_setdp)
{
	lw_expr_t e;

	l -> len = 0;
	
	if (as -> output_format == OUTPUT_OBJ)
	{
		lwasm_register_error(as, l, "SETDP not permitted for object target");
		return;
	}
	
	e = lwasm_parse_expr(as, p);
	if (!e)
	{
		lwasm_register_error(as, l, "Bad operand");
		return;
	}
	
	// try simplifying the expression and see if it turns into an int
	lwasm_reduce_expr(as, e);
	if (!lw_expr_istype(e, lw_expr_type_int))
	{
		lwasm_register_error(as, l, "SETDP must be constant on pass 1");
		lw_expr_destroy(e);
		return;
	}
	l -> dpval = lw_expr_intval(e) & 0xff;
	lw_expr_destroy(e);
	l -> dshow = l -> dpval;
	l -> dsize = 1;
}

PARSEFUNC(pseudo_parse_ifp1)
{
	l -> len = 0;
	l -> hideline = 1;
	
	if (as -> skipcond && !(as -> skipmacro))
	{
		as -> skipcount++;
		skip_operand(p);
		return;
	}
	
	lwasm_register_warning(as, l, "IFP1 if is not supported; ignoring");
	
}

PARSEFUNC(pseudo_parse_ifp2)
{
	l -> len = 0;
	l -> hideline = 1;
	
	if (as -> skipcond && !(as -> skipmacro))
	{
		as -> skipcount++;
		skip_operand(p);
		return;
	}
	
	lwasm_register_warning(as, l, "IFP2 if is not supported; ignoring");
}

PARSEFUNC(pseudo_parse_ifeq)
{
	lw_expr_t e;
	
	l -> len = 0;
	l -> hideline = 1;
	
	if (as -> skipcond && !(as -> skipmacro))
	{
		as -> skipcount++;
		skip_operand(p);
		return;
	}

	e = lwasm_parse_cond(as, p);
	if (e)
		lwasm_reduce_expr(as, e);
	if (e && lw_expr_intval(e) != 0)
	{
		as -> skipcond = 1;
		as -> skipcount = 1;
	}
}

PARSEFUNC(pseudo_parse_ifne)
{
	lw_expr_t e;
	
	l -> len = 0;
	l -> hideline = 1;
	
	if (as -> skipcond && !(as -> skipmacro))
	{
		as -> skipcount++;
		skip_operand(p);
		return;
	}

	e = lwasm_parse_cond(as, p);
	if (e)
		lwasm_reduce_expr(as, e);
	if (e && lw_expr_intval(e) == 0)
	{
		as -> skipcond = 1;
		as -> skipcount = 1;
	}
}


PARSEFUNC(pseudo_parse_ifgt)
{
	lw_expr_t e;
	
	l -> len = 0;
	l -> hideline = 1;
	
	if (as -> skipcond && !(as -> skipmacro))
	{
		as -> skipcount++;
		skip_operand(p);
		return;
	}

	e = lwasm_parse_cond(as, p);
	if (e)
		lwasm_reduce_expr(as, e);
	if (e && lw_expr_intval(e) <= 0)
	{
		as -> skipcond = 1;
		as -> skipcount = 1;
	}
}

PARSEFUNC(pseudo_parse_ifge)
{
	lw_expr_t e;
	
	l -> len = 0;
	l -> hideline = 1;
	
	if (as -> skipcond && !(as -> skipmacro))
	{
		as -> skipcount++;
		skip_operand(p);
		return;
	}

	e = lwasm_parse_cond(as, p);
	if (e)
		lwasm_reduce_expr(as, e);
	if (e && lw_expr_intval(e) < 0)
	{
		as -> skipcond = 1;
		as -> skipcount = 1;
	}
}

PARSEFUNC(pseudo_parse_iflt)
{
	lw_expr_t e;
	
	l -> len = 0;
	l -> hideline = 1;
	
	if (as -> skipcond && !(as -> skipmacro))
	{
		as -> skipcount++;
		skip_operand(p);
		return;
	}

	e = lwasm_parse_cond(as, p);
	if (e)
		lwasm_reduce_expr(as, e);
	if (e && lw_expr_intval(e) >= 0)
	{
		as -> skipcond = 1;
		as -> skipcount = 1;
	}
}

PARSEFUNC(pseudo_parse_ifle)
{
	lw_expr_t e;

	l -> hideline = 1;
	l -> len = 0;
	
	if (as -> skipcond && !(as -> skipmacro))
	{
		as -> skipcount++;
		skip_operand(p);
		return;
	}

	e = lwasm_parse_cond(as, p);
	if (e)
		lwasm_reduce_expr(as, e);
	if (e && lw_expr_intval(e) > 0)
	{
		as -> skipcond = 1;
		as -> skipcount = 1;
	}
}

PARSEFUNC(pseudo_parse_endc)
{
	l -> hideline = 1;
	l -> len = 0;
	skip_operand(p);
	if (as -> skipcond && !(as -> skipmacro))
	{
		as -> skipcount--;
		if (as -> skipcount <= 0)
			as -> skipcond = 0;
	}
}

PARSEFUNC(pseudo_parse_else)
{
	l -> len = 0;
	l -> hideline = 1;
	skip_operand(p);
	
	if (as -> skipmacro)
		return;
	
	if (as -> skipcond)
	{
		if (as -> skipcount == 1)
		{
			as -> skipcount = 0;
			as -> skipcond = 0;
		}
		return;
	}
	as -> skipcond = 1;
	as -> skipcount = 1;
}

PARSEFUNC(pseudo_parse_ifdef)
{
	char *sym;
	int i;
	struct symtabe *s;
	
	l -> len = 0;
	l -> hideline = 1;
	
	if (as -> skipcond && !(as -> skipmacro))
	{
		as -> skipcount++;
		skip_operand(p);
		return;
	}

again:
	for (i = 0; (*p)[i] && !isspace((*p)[i]) && (*p)[i] != '|' && (*p)[i] != '&'; i++)
		/* do nothing */ ;
	
	sym = lw_strndup(*p, i);
	(*p) += i;
	
	s = lookup_symbol(as, l, sym);
	
	lw_free(sym);
	
	if (!s)
	{
		if (**p == '|')
		{
			(*p)++;
			goto again;
		}
		as -> skipcond = 1;
		as -> skipcount = 1;
	}
	skip_operand(p);
}

PARSEFUNC(pseudo_parse_ifndef)
{
	char *sym;
	int i;
	struct symtabe *s;
	
	l -> len = 0;
	l -> hideline = 1;
	
	if (as -> skipcond && !(as -> skipmacro))
	{
		as -> skipcount++;
		skip_operand(p);
		return;
	}
	for (i = 0; (*p)[i] && !isspace((*p)[i]) && (*p)[i] != '&' && (*p)[i] != '|'; i++)
		/* do nothing */ ;
	
	sym = lw_strndup(*p, i);
	(*p) += i;
	
	s = lookup_symbol(as, l, sym);
	
	lw_free(sym);

	if (s)
	{
		as -> skipcond = 1;
		as -> skipcount = 1;
		return;
	}
}

PARSEFUNC(pseudo_parse_error)
{
	lwasm_register_error(as, l, "User error: %s", *p);
	skip_operand(p);
}

PARSEFUNC(pseudo_parse_warning)
{
	lwasm_register_warning(as, l, "User warning: %s", *p);
	l -> len = 0;
	skip_operand(p);
}

PARSEFUNC(pseudo_parse_includebin)
{
	char *fn, *p2;
	int delim = 0;
	FILE *fp;
	long flen;
	char *rfn;
	
	if (!**p)
	{
		lwasm_register_error(as, l, "Missing filename");
		return;
	}
	
	if (**p == '"' || **p == '\'')
	{
		delim = **p;
		(*p)++;

		for (p2 = *p; *p2 && (*p2 != delim); p2++)
			/* do nothing */ ;
	}
	else
	{
		for (p2 = *p; *p2 && !isspace(*p2); p2++)
			/* do nothing */ ;
	}
	fn = lw_strndup(*p, p2 - *p);
	*p = p2;
	if (delim && **p)
		(*p)++;
	
	fp = input_open_standalone(as, fn, &rfn);
	if (!fp)
	{
		lwasm_register_error(as, l, "Cannot open file");
		lw_free(fn);
		return;
	}
	
	l -> lstr = rfn;
	
	fseek(fp, 0, SEEK_END);
	flen = ftell(fp);
	fclose(fp);

	l -> len = flen;
}

EMITFUNC(pseudo_emit_includebin)
{
	FILE *fp;
	int c;
	
	fp = fopen(l -> lstr, "rb");
	if (!fp)
	{
		lwasm_register_error(as, l, "Cannot open file (emit)!");
		return;
	}
	
	for (;;)
	{
		c = fgetc(fp);
		if (c == EOF)
		{
			fclose(fp);
			return;
		}
		lwasm_emit(l, c);
	}
}

PARSEFUNC(pseudo_parse_include)
{
	char *fn, *p2;
	char *p3;
	int delim = 0;
	int len;
	char buf[110];
		
	if (!**p)
	{
		lwasm_register_error(as, l, "Missing filename");
		return;
	}
	
	if (**p == '"' || **p == '\'')
	{
		delim = **p;
		(*p)++;

		for (p2 = *p; *p2 && *p2 != delim; p2++)
			/* do nothing */ ;
	}
	else
	{
		for (p2 = *p; *p2 && !isspace(*p2); p2++)
			/* do nothing */ ;
	}
	fn = lw_strndup(*p, p2 - *p);
	(*p) = p2;
	if (delim && **p)
		(*p)++;

	/* add a book-keeping entry for line numbers */
	snprintf(buf, 100, "\001\001SETLINENO %d\n", l -> lineno + 1);
	input_openstring(as, "INTERNAL", buf);
	
	len = strlen(fn) + 8;
	p3 = lw_alloc(len + 1);
	sprintf(p3, "include:%s", fn);
	as -> fileerr = 0;
	input_open(as, p3);
	lw_free(p3);

	if (as -> fileerr == 0)
		l -> hideline = 1;
	l -> len = 0;
	lw_free(fn);
}

PARSEFUNC(pseudo_parse_align)
{
	lw_expr_t e;
	if (!**p)
	{
		lwasm_register_error(as, l, "Bad operand");
		return;
	}
	
	e = lwasm_parse_expr(as, p);
	
	if (!e)
	{
		lwasm_register_error(as, l, "Bad operand");
		return;
	}
	
	lwasm_save_expr(l, 0, e);
	
	if (**p == ',')
	{
		(*p)++;
		e = lwasm_parse_expr(as, p);
	}
	else
	{
		e = lw_expr_build(lw_expr_type_int, 0);
	}
	if (!e)
	{
		lwasm_register_error(as, l, "Bad padding");
		return;
	}
	
	lwasm_save_expr(l, 1, e);
}

RESOLVEFUNC(pseudo_resolve_align)
{
	lw_expr_t e;
	int align = 1;
	lw_expr_t te;
	int a;
	
	e = lwasm_fetch_expr(l, 0);
	
	if (lw_expr_istype(e, lw_expr_type_int))
	{
		align = lw_expr_intval(e);
		if (align < 1)
		{
			lwasm_register_error(as, l, "Invalid alignment");
			return;
		}
	}
	else
	{
		return;
	}
	

	te = lw_expr_copy(l -> addr);
	as -> exportcheck = 1;
	lwasm_reduce_expr(as, te);
	as -> exportcheck = 0;

	if (lw_expr_istype(te, lw_expr_type_int))
	{
		a = lw_expr_intval(te);
	}
	else
	{
		a = -1;
	}
	lw_expr_destroy(te);

	if (a >= 0)
	{
		if (a % align == 0)
		{
			l -> len = 0;
			return;
		}
		l -> len = align - (a % align);
		return;
	}
}

EMITFUNC(pseudo_emit_align)
{
	lw_expr_t e;
	int i;
	
	if (l -> csect && (l -> csect -> flags & (section_flag_bss | section_flag_constant)))
		return;
	e = lwasm_fetch_expr(l, 1);
	for (i = 0; i < l -> len; i++)
	{
		lwasm_emitexpr(l, e, 1);
	}
}

PARSEFUNC(pseudo_parse_fill)
{
	lw_expr_t e, e1;
	if (!**p)
	{
		lwasm_register_error(as, l, "Bad operand");
		return;
	}
	
	e1 = lwasm_parse_expr(as, p);
	if (**p != ',')
	{
		lwasm_register_error(as, l, "Bad operand");
		return;
	}
	(*p)++;
	e = lwasm_parse_expr(as, p);
	
	if (!e)
	{
		lwasm_register_error(as, l, "Bad operand");
		return;
	}
	
	lwasm_save_expr(l, 0, e);
	lwasm_save_expr(l, 1, e1);

	if (!e1)
	{
		lwasm_register_error(as, l, "Bad padding");
		return;
	}
}

RESOLVEFUNC(pseudo_resolve_fill)
{
	lw_expr_t e, te;
	int align = 1;

	e = lwasm_fetch_expr(l, 0);
	
	te = lw_expr_copy(e);
	as -> exportcheck = 1;
	lwasm_reduce_expr(as, te);
	as -> exportcheck = 0;

	if (lw_expr_istype(te, lw_expr_type_int))
	{
		align = lw_expr_intval(te);
		if (align < 0)
		{
			lw_expr_destroy(te);
			lwasm_register_error(as, l, "Invalid fill length");
			return;
		}
	}
	else
	{
		lw_expr_destroy(te);
		return;
	}
	lw_expr_destroy(te);
	
	l -> len = align;
}

EMITFUNC(pseudo_emit_fill)
{
	lw_expr_t e;
	int i;
	
	/* don't emit anything in bss */
	if (l -> csect && (l -> csect -> flags & (section_flag_bss | section_flag_constant)))
		return;
	
	e = lwasm_fetch_expr(l, 1);
	for (i = 0; i < l -> len; i++)
	{
		lwasm_emitexpr(l, e, 1);
	}
}

/* string conditional argument parser */
/*
argument syntax:

a bare word ended by whitespace, comma, or NUL
a double quote delimited string containing arbitrary printable characters
a single quote delimited string containing arbitrary printable characters

In a double quoted string, a double quote cannot be represented.
In a single quoted string, a single quote cannot be represented.

*/
char *strcond_parsearg(char **p)
{
	char *arg;
	char *tstr;
	int i;
	tstr = *p;

	if (!**p || isspace(**p))
	{
		return lw_strdup("");
	}
	
	if (*tstr == '"')
	{
		// double quote delim
		tstr++;
		for (i = 0; tstr[i] && tstr[i] != '"'; i++)
			/* do nothing */ ;
		
		arg = lw_alloc(i + 1);
		strncpy(arg, tstr, i);
		arg[i] = 0;
		
		if (tstr[i])
			i++;
		
		*p += i;
		return arg;
	}
	else if (*tstr == '\'')
	{
		// single quote delim
		tstr++;
		for (i = 0; tstr[i] && tstr[i] != '\''; i++)
			/* do nothing */ ;
		
		arg = lw_alloc(i + 1);
		strncpy(arg, tstr, i);
		arg[i] = 0;
		
		if (tstr[i])
			i++;
		
		*p += i;
		return arg;
	}
	else
	{
		// bare word - whitespace or comma delim
		for (i = 0; tstr[i] && !isspace(tstr[i]) && tstr[i] != ','; i++)
			/* do nothing */ ;
		
		arg = lw_alloc(i + 1);
		strncpy(arg, tstr, i);
		arg[i] = 0;
		if (tstr[i] == ',')
			i++;
		
		*p += i;
		return arg;
	}
}

/* string conditional helpers */
/* return "1" for true, "0" for false */
int strcond_eq(char **p)
{
	char *arg1;
	char *arg2;
	int c = 0;
		
	arg1 = strcond_parsearg(p);
	arg2 = strcond_parsearg(p);
	
	if (strcmp(arg1, arg2) == 0)
		c = 1;
	lw_free(arg1);
	lw_free(arg2);
	return c;
}

int strcond_ieq(char **p)
{
	char *arg1;
	char *arg2;
	int c = 0;
		
	arg1 = strcond_parsearg(p);
	arg2 = strcond_parsearg(p);
	
	if (strcasecmp(arg1, arg2) == 0)
		c = 1;
	lw_free(arg1);
	lw_free(arg2);
	return c;
}

int strcond_ne(char **p)
{
	char *arg1;
	char *arg2;
	int c = 0;
		
	arg1 = strcond_parsearg(p);
	arg2 = strcond_parsearg(p);
	
	if (strcmp(arg1, arg2) != 0)
		c = 1;
	lw_free(arg1);
	lw_free(arg2);
	return c;
}

int strcond_ine(char **p)
{
	char *arg1;
	char *arg2;
	int c = 0;
		
	arg1 = strcond_parsearg(p);
	arg2 = strcond_parsearg(p);
	
	if (strcasecmp(arg1, arg2) != 0)
		c = 1;
	lw_free(arg1);
	lw_free(arg2);
	return c;
}

int strcond_peq(char **p)
{
	char *arg0;
	char *arg1;
	char *arg2;
	int plen;
	int c = 0;
	
	arg0 = strcond_parsearg(p);
	arg1 = strcond_parsearg(p);
	arg2 = strcond_parsearg(p);
	
	plen = strtol(arg0, NULL, 10);
	if (strlen(arg1) > plen)
		arg1[plen] = 0;
	if (strlen(arg2) > plen)
		arg2[plen] = 0;

	if (strcmp(arg1, arg2) == 0)
		c = 1;
	lw_free(arg0);
	lw_free(arg1);
	lw_free(arg2);
	return c;
}

int strcond_ipeq(char **p)
{
	char *arg0;
	char *arg1;
	char *arg2;
	int plen;
	int c = 0;
	
	arg0 = strcond_parsearg(p);
	arg1 = strcond_parsearg(p);
	arg2 = strcond_parsearg(p);
	
	plen = strtol(arg0, NULL, 10);
	if (strlen(arg1) > plen)
		arg1[plen] = 0;
	if (strlen(arg2) > plen)
		arg2[plen] = 0;

	if (strcasecmp(arg1, arg2) == 0)
		c = 1;
	lw_free(arg0);
	lw_free(arg1);
	lw_free(arg2);
	return c;
}

int strcond_pne(char **p)
{
	char *arg0;
	char *arg1;
	char *arg2;
	int plen;
	int c = 0;
	
	arg0 = strcond_parsearg(p);
	arg1 = strcond_parsearg(p);
	arg2 = strcond_parsearg(p);
	
	plen = strtol(arg0, NULL, 10);
	if (strlen(arg1) > plen)
		arg1[plen] = 0;
	if (strlen(arg2) > plen)
		arg2[plen] = 0;

	if (strcmp(arg1, arg2) != 0)
		c = 1;
	lw_free(arg0);
	lw_free(arg1);
	lw_free(arg2);
	return c;
}

int strcond_ipne(char **p)
{
	char *arg0;
	char *arg1;
	char *arg2;
	int plen;
	int c = 0;
	
	arg0 = strcond_parsearg(p);
	arg1 = strcond_parsearg(p);
	arg2 = strcond_parsearg(p);

	plen = strtol(arg0, NULL, 10);
	if (strlen(arg1) > plen)
		arg1[plen] = 0;
	if (strlen(arg2) > plen)
		arg2[plen] = 0;

	if (strcasecmp(arg1, arg2) != 0)
		c = 1;
	lw_free(arg0);
	lw_free(arg1);
	lw_free(arg2);
	return c;
}

int strcond_seq(char **p)
{
	char *arg0;
	char *arg1;
	char *arg2;
	char *rarg1;
	char *rarg2;
	
	int plen;
	int c = 0;
	
	arg0 = strcond_parsearg(p);
	arg1 = strcond_parsearg(p);
	arg2 = strcond_parsearg(p);
	
	rarg1 = arg1;
	rarg2 = arg2;

	plen = strtol(arg0, NULL, 10);
	if (strlen(arg1) > plen)
	{
		rarg1 += strlen(arg1) - plen;
	}
	if (strlen(arg2) > plen)
	{
		rarg2 += strlen(arg2) - plen;
	}
	if (strcmp(rarg1, rarg2) == 0)
		c = 1;
	lw_free(arg0);
	lw_free(arg1);
	lw_free(arg2);
	return c;
}

int strcond_iseq(char **p)
{
	char *arg0;
	char *arg1;
	char *arg2;
	char *rarg1;
	char *rarg2;
	
	int plen;
	int c = 0;
	
	arg0 = strcond_parsearg(p);
	arg1 = strcond_parsearg(p);
	arg2 = strcond_parsearg(p);
	
	rarg1 = arg1;
	rarg2 = arg2;
		
	plen = strtol(arg0, NULL, 10);
	if (strlen(arg1) > plen)
	{
		rarg1 += strlen(arg1) - plen;
	}
	if (strlen(arg2) > plen)
	{
		rarg2 += strlen(arg2) - plen;
	}
	
	if (strcasecmp(rarg1, rarg2) == 0)
		c = 1;
	lw_free(arg0);
	lw_free(arg1);
	lw_free(arg2);
	return c;
}


int strcond_sne(char **p)
{
	char *arg0;
	char *arg1;
	char *arg2;
	char *rarg1;
	char *rarg2;
	
	int plen;
	int c = 0;
	
	arg0 = strcond_parsearg(p);
	arg1 = strcond_parsearg(p);
	arg2 = strcond_parsearg(p);
	
	rarg1 = arg1;
	rarg2 = arg2;
		
	plen = strtol(arg0, NULL, 10);
	if (strlen(arg1) > plen)
	{
		rarg1 += strlen(arg1) - plen;
	}
	if (strlen(arg2) > plen)
	{
		rarg2 += strlen(arg2) - plen;
	}
	
	if (strcmp(rarg1, rarg2) != 0)
		c = 1;
	lw_free(arg0);
	lw_free(arg1);
	lw_free(arg2);
	return c;
}

int strcond_isne(char **p)
{
	char *arg0;
	char *arg1;
	char *arg2;
	char *rarg1;
	char *rarg2;
	
	int plen;
	int c = 0;
	
	arg0 = strcond_parsearg(p);
	arg1 = strcond_parsearg(p);
	arg2 = strcond_parsearg(p);
	
	rarg1 = arg1;
	rarg2 = arg2;
		
	plen = strtol(arg0, NULL, 10);
	if (strlen(arg1) > plen)
	{
		rarg1 += strlen(arg1) - plen;
	}
	if (strlen(arg2) > plen)
	{
		rarg2 += strlen(arg2) - plen;
	}
	
	if (strcasecmp(rarg1, rarg2) != 0)
		c = 1;
	lw_free(arg0);
	lw_free(arg1);
	lw_free(arg2);
	return c;
}

/* string conditionals */
PARSEFUNC(pseudo_parse_ifstr)
{
	static struct strconds
	{
		char *str;
		int (*fn)(char **ptr);
	} strops[] = {
		{ "eq", strcond_eq },
		{ "ieq", strcond_ieq },
		{ "ne", strcond_ne },
		{ "ine", strcond_ine },
		{ "peq", strcond_peq },
		{ "ipeq", strcond_ipeq },
		{ "pne", strcond_pne },
		{ "ipne", strcond_ipne },
		{ "seq", strcond_seq },
		{ "iseq", strcond_iseq },
		{ "sne", strcond_sne },
		{ "isne", strcond_isne },
		{ NULL, 0 }
	};
	int tv = 0;
	char *tstr;
	int strop;
	
	l -> len = 0;
	
	if (as -> skipcond && !(as -> skipmacro))
	{
		as -> skipcount++;
		skip_operand(p);
		return;
	}

	tstr = strcond_parsearg(p);
	if (!**p || isspace(**p))	
	{
		lwasm_register_error(as, l, "Bad string condition");
		return;
	}
		
	for (strop = 0; strops[strop].str != NULL; strop++)
		if (strcasecmp(strops[strop].str, tstr) == 0)
			break;
	
	lw_free(tstr);
	
	if (strops[strop].str == NULL)
	{
		lwasm_register_error(as, l, "Bad string condition");
	}

	tv = (*(strops[strop].fn))(p);
	
	if (!tv)
	{
		as -> skipcond = 1;
		as -> skipcount = 1;
	}
}