/*
 * $Id$
 *
    Copyright (c) 2006-2019 Chung, Hyung-Hwan. All rights reserved.

    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions
    are met:
    1. Redistributions of source code must retain the above copyright
       notice, this list of conditions and the following disclaimer.
    2. Redistributions in binary form must reproduce the above copyright
       notice, this list of conditions and the following disclaimer in the
       documentation and/or other materials provided with the distribution.

    THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR
    IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
    OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
    IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
    INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
    NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
    DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
    THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <qse/sed/stdsed.h>
#include <qse/cmn/str.h>
#include <qse/cmn/mem.h>
#include <qse/cmn/chr.h>
#include <qse/cmn/opt.h>
#include <qse/cmn/xma.h>
#include <qse/cmn/path.h>
#include <qse/cmn/main.h>
#include <qse/cmn/mbwc.h>
#include <qse/cmn/fmt.h>
#include <qse/si/fs.h>
#include <qse/si/glob.h>
#include <qse/si/sio.h>
#include <qse/si/intr.h>


#include <locale.h>
#include <stdio.h>

#if defined(_WIN32)
#	include <windows.h>
#elif defined(__OS2__)
#	define INCL_ERRORS
#	include <os2.h>
#	include <signal.h>
#elif defined(__DOS__)
#	include <dos.h>
#	include <signal.h>
#else
#	include <unistd.h>
#	include <errno.h>
#	include <signal.h>
#endif

static struct
{
	qse_sed_iostd_t* io;
	qse_size_t capa;
	qse_size_t size;
} g_script = 
{
	QSE_NULL,
	0,
	0
};

static qse_char_t* g_output_file = QSE_NULL;
static int g_infile_pos = 0;
static int g_option = 0;
static int g_separate = 0;
static int g_inplace = 0;
static int g_wildcard = 0;
#if defined(QSE_ENABLE_SEDTRACER)
static int g_trace = 0;
#endif
static qse_ulong_t g_memlimit = 0;
static qse_sed_t* g_sed = QSE_NULL;

static qse_cmgr_t* g_script_cmgr = QSE_NULL;
static qse_cmgr_t* g_infile_cmgr = QSE_NULL;
static qse_cmgr_t* g_outfile_cmgr = QSE_NULL;

#if defined(QSE_BUILD_DEBUG)
#include <stdlib.h>
static qse_ulong_t g_failmalloc = 0;
static qse_ulong_t debug_mmgr_count = 0;
static qse_ulong_t debug_mmgr_alloc_count = 0;
static qse_ulong_t debug_mmgr_realloc_count = 0;
static qse_ulong_t debug_mmgr_free_count = 0;

static void* debug_mmgr_alloc (qse_mmgr_t* mmgr, qse_size_t size)
{
	void* ptr;
	debug_mmgr_count++;
	if (debug_mmgr_count % g_failmalloc == 0) return QSE_NULL;
	ptr = malloc (size);
	if (ptr) debug_mmgr_alloc_count++;
	return ptr;
}

static void* debug_mmgr_realloc (qse_mmgr_t* mmgr, void* ptr, qse_size_t size)
{
	void* rptr;
	debug_mmgr_count++;
	if (debug_mmgr_count % g_failmalloc == 0) return QSE_NULL;
	rptr = realloc (ptr, size);
	if (rptr)
	{
		if (ptr) debug_mmgr_realloc_count++;
		else debug_mmgr_alloc_count++;
	}
	return rptr;
}

static void debug_mmgr_free (qse_mmgr_t* mmgr, void* ptr)
{
	debug_mmgr_free_count++;
	free (ptr);
}

static qse_mmgr_t debug_mmgr =
{
	debug_mmgr_alloc,
	debug_mmgr_realloc,
	debug_mmgr_free,
	QSE_NULL
};
#endif

static void* xma_alloc (qse_mmgr_t* mmgr, qse_size_t size)
{
	return qse_xma_alloc (mmgr->ctx, size);
}

static void* xma_realloc (qse_mmgr_t* mmgr, void* ptr, qse_size_t size)
{
	return qse_xma_realloc (mmgr->ctx, ptr, size);
}

static void xma_free (qse_mmgr_t* mmgr, void* ptr)
{
	qse_xma_free (mmgr->ctx, ptr);
}

static qse_mmgr_t xma_mmgr = 
{
	xma_alloc,
	xma_realloc,
	xma_free,
	QSE_NULL
};

static void print_version (void)
{
	qse_fprintf (QSE_STDOUT, QSE_T("QSESED %hs\n"), QSE_PACKAGE_VERSION);
	qse_fprintf (QSE_STDOUT, QSE_T("Copyright 2006-2019 Chung, Hyung-Hwan\n"));
}

static void print_usage (qse_sio_t* out, int argc, qse_char_t* argv[])
{
	const qse_char_t* b = qse_basename (argv[0]);

	qse_fprintf (out, QSE_T("USAGE: %s [options] script [file]\n"), b);
	qse_fprintf (out, QSE_T("       %s [options] -f script-file [file]\n"), b);
	qse_fprintf (out, QSE_T("       %s [options] -e script [file]\n"), b);

	qse_fprintf (out, QSE_T("options as follows:\n"));
	qse_fprintf (out, QSE_T(" -h/--help                 show this message\n"));
	qse_fprintf (out, QSE_T(" --version                 show version\n"));
	qse_fprintf (out, QSE_T(" -n                        disable auto-print\n"));
	qse_fprintf (out, QSE_T(" -e                 script specify a script\n"));
	qse_fprintf (out, QSE_T(" -f                 file   specify a script file\n"));
	qse_fprintf (out, QSE_T(" -o                 file   specify an output file\n"));
	qse_fprintf (out, QSE_T(" -r                        use the extended regular expression\n"));
	qse_fprintf (out, QSE_T(" -R                        enable non-standard extensions to the regular\n"));
	qse_fprintf (out, QSE_T("                           expression\n"));
	qse_fprintf (out, QSE_T(" -i                        perform in-place editing. imply -s\n"));
	qse_fprintf (out, QSE_T(" -s                        process input files separately\n"));
	qse_fprintf (out, QSE_T(" -a                        perform strict address and label check\n"));
	qse_fprintf (out, QSE_T(" -b                        allow extended address formats\n"));
	qse_fprintf (out, QSE_T("                           <start~step>,<start,+line>,<start,~line>,<0,/regex/>\n"));
	qse_fprintf (out, QSE_T(" -x                        allow text on the same line as c, a, i\n"));
	qse_fprintf (out, QSE_T(" -y                        ensure a newline at text end\n"));
	qse_fprintf (out, QSE_T(" -m                 number specify the maximum amount of memory to use in bytes\n"));
	qse_fprintf (out, QSE_T(" -w                        expand file wildcards\n"));
#if defined(QSE_ENABLE_SEDTRACER)
	qse_fprintf (out, QSE_T(" -t                        print command traces\n"));
#endif
#if defined(QSE_BUILD_DEBUG)
	qse_fprintf (out, QSE_T(" -X                 number fail the number'th memory allocation\n"));
#endif
#if defined(QSE_CHAR_IS_WCHAR)
     qse_fprintf (out, QSE_T(" --script-encoding  string specify script file encoding name\n"));
     qse_fprintf (out, QSE_T(" --infile-encoding  string specify input file encoding name\n"));
     qse_fprintf (out, QSE_T(" --outfile-encoding string specify output file encoding name\n"));
#endif
}

static int add_script (const qse_char_t* str, int mem)
{
	if (g_script.size >= g_script.capa)
	{
		qse_sed_iostd_t* tmp;

		tmp = QSE_MMGR_REALLOC (
			QSE_MMGR_GETDFL(), 
			g_script.io, 
			QSE_SIZEOF(*g_script.io) * (g_script.capa + 16 + 1));
		if (tmp == QSE_NULL) 
		{
			qse_fprintf (QSE_STDERR, QSE_T("ERROR: out of memory while processing %s\n"), str);
			return -1;
		}

		g_script.io = tmp;
		g_script.capa += 16;
	} 

	if (mem)
	{
		g_script.io[g_script.size].type = QSE_SED_IOSTD_STR;
		/* though its type is not qualified to be const, 
		 * u.mem.ptr is actually const when used for input */
		g_script.io[g_script.size].u.str.ptr = (qse_char_t*)str;
		g_script.io[g_script.size].u.str.len = qse_strlen(str);
	}
	else
	{
		g_script.io[g_script.size].type = QSE_SED_IOSTD_FILE;
		g_script.io[g_script.size].u.file.path = str;
		g_script.io[g_script.size].u.file.cmgr = g_script_cmgr;
	}
	g_script.size++;
	return 0;
}

static void free_scripts (void)
{
	if (g_script.io)
	{
		QSE_MMGR_FREE (QSE_MMGR_GETDFL(), g_script.io);
		g_script.io = QSE_NULL;
		g_script.capa = 0;
		g_script.size = 0;
	}
}

static int handle_args (int argc, qse_char_t* argv[])
{
	static qse_opt_lng_t lng[] = 
	{
#if defined(QSE_CHAR_IS_WCHAR)
		{ QSE_T(":script-encoding"),  QSE_T('\0') },
		{ QSE_T(":infile-encoding"),  QSE_T('\0') },
		{ QSE_T(":outfile-encoding"), QSE_T('\0') },
#endif

		{ QSE_T("version"),          QSE_T('\0') },
		{ QSE_T("help"),             QSE_T('h') },
		{ QSE_NULL,                  QSE_T('\0') }                  
	};
	static qse_opt_t opt = 
	{
#if defined(QSE_BUILD_DEBUG)
		QSE_T("hne:f:o:rRisabxytm:wX:"),
#else
		QSE_T("hne:f:o:rRisabxytm:w"),
#endif
		lng
	};
	qse_cint_t c;

	while ((c = qse_getopt (argc, argv, &opt)) != QSE_CHAR_EOF)
	{
		switch (c)
		{
			default:
				print_usage (QSE_STDERR, argc, argv);
				goto oops;

			case QSE_T('?'):
				qse_fprintf (QSE_STDERR, 
					QSE_T("ERROR: bad option - %c\n"),
					opt.opt
				);
				print_usage (QSE_STDERR, argc, argv);
				goto oops;

			case QSE_T(':'):
				qse_fprintf (QSE_STDERR, 
					QSE_T("ERROR: bad parameter for %c\n"),
					opt.opt
				);
				print_usage (QSE_STDERR, argc, argv);
				goto oops;

			case QSE_T('h'):
				print_usage (QSE_STDOUT, argc, argv);
				goto done;

			case QSE_T('n'):
				g_option |= QSE_SED_QUIET;
				break;

			case QSE_T('e'):
				if (add_script (opt.arg, 1) <= -1) goto oops;
				break;

			case QSE_T('f'):
				if (add_script (opt.arg, 0) <= -1) goto oops;
				break;

			case QSE_T('o'):
				g_output_file = opt.arg;
				break;

			case QSE_T('r'):
				g_option |= QSE_SED_EXTENDEDREX;
				break;

			case QSE_T('R'):
				g_option |= QSE_SED_NONSTDEXTREX;
				break;

			case QSE_T('i'):
				/* 'i' implies 's'. */
				g_inplace = 1;

			case QSE_T('s'):
				g_separate = 1;
				break;
		
			case QSE_T('a'):
				g_option |= QSE_SED_STRICT;
				break;

			case QSE_T('b'):
				g_option |= QSE_SED_EXTENDEDADR;
				break;

			case QSE_T('x'):
				g_option |= QSE_SED_SAMELINE;
				break;

			case QSE_T('y'):
				g_option |= QSE_SED_ENSURENL;
				break;

			case QSE_T('t'):
#if defined(QSE_ENABLE_SEDTRACER)
				g_trace = 1;
				break;
#else
				print_usage (QSE_STDERR, argc, argv);
				goto oops;
#endif
 
			case QSE_T('m'):
				g_memlimit = qse_strtoulong (opt.arg, 10, QSE_NULL);
				break;

			case QSE_T('w'):
				g_wildcard = 1;
				break;

#if defined(QSE_BUILD_DEBUG)
			case QSE_T('X'):
				g_failmalloc = qse_strtoulong (opt.arg, 10, QSE_NULL);
				break;
#endif

			case QSE_T('\0'):
			{
				if (qse_strcmp(opt.lngopt, QSE_T("version")) == 0)
				{
					print_version ();
					goto done;
				}
				else if (qse_strcmp(opt.lngopt, QSE_T("script-encoding")) == 0)
				{
					g_script_cmgr = qse_findcmgr (opt.arg);
					if (g_script_cmgr == QSE_NULL)
					{
						qse_fprintf (QSE_STDERR, QSE_T("ERROR: unknown script encoding - %s\n"), opt.arg);
						goto oops;
					}
				}
				else if (qse_strcmp(opt.lngopt, QSE_T("infile-encoding")) == 0)
				{
					g_infile_cmgr = qse_findcmgr (opt.arg);
					if (g_infile_cmgr == QSE_NULL)
					{
						qse_fprintf (QSE_STDERR, QSE_T("ERROR: unknown input file encoding - %s\n"), opt.arg);
						goto oops;
					}
				}
				else if (qse_strcmp(opt.lngopt, QSE_T("outfile-encoding")) == 0)
				{
					g_outfile_cmgr = qse_findcmgr (opt.arg);
					if (g_outfile_cmgr == QSE_NULL)
					{
						qse_fprintf (QSE_STDERR, QSE_T("ERROR: unknown output file encoding - %s\n"), opt.arg);
						goto oops;
					}
				}
				break;
			}

		}
	}

	if (opt.ind < argc && g_script.size <= 0) 
	{
		if (add_script (argv[opt.ind++], 1) <= -1) goto oops;
	}
	if (opt.ind < argc) g_infile_pos = opt.ind;

	if (g_script.size <= 0)
	{
		print_usage (QSE_STDERR, argc, argv);
		goto oops;
	}

	g_script.io[g_script.size].type = QSE_SED_IOSTD_NULL;
	return 1;

oops:
	free_scripts ();
	return -1;

done:
	free_scripts ();
	return 0;
}

void print_exec_error (qse_sed_t* sed)
{
	const qse_sed_loc_t* errloc = qse_sed_geterrloc(sed);
	if (errloc->line > 0 || errloc->colm > 0)
	{
		qse_fprintf (QSE_STDERR, 
			QSE_T("ERROR: cannot execute - %s at line %lu column %lu\n"),
			qse_sed_geterrmsg(sed),
			(unsigned long)errloc->line,
			(unsigned long)errloc->colm
		);
	}
	else
	{
		qse_fprintf (QSE_STDERR, 
			QSE_T("ERROR: cannot execute - %s\n"),
			qse_sed_geterrmsg(sed)
		);
	}
}


#if !defined(_WIN32) && !defined(__OS2__) && !defined(__DOS__) && defined(SIGPIPE)
static int setsignal (int sig, void(*handler)(int), int restart)
{
	struct sigaction sa_int;

	sa_int.sa_handler = handler;
	sigemptyset (&sa_int.sa_mask);
	
	sa_int.sa_flags = 0;

	if (restart)
	{
	#if defined(SA_RESTART)
		sa_int.sa_flags |= SA_RESTART;
	#endif
	}
	else
	{
	#if defined(SA_INTERRUPT)
		sa_int.sa_flags |= SA_INTERRUPT;
	#endif
	}
	return sigaction (sig, &sa_int, NULL);
}
#endif

static void stop_run (void* arg)
{
#if !defined(_WIN32) && !defined(__OS2__) && !defined(__DOS__)
	int e = errno;
#endif

	qse_sed_halt (g_sed);

#if !defined(_WIN32) && !defined(__OS2__) && !defined(__DOS__)
	errno = e;
#endif
}

static void set_intr_run (void)
{
	qse_set_intr_handler (stop_run, QSE_NULL);
#if !defined(_WIN32) && !defined(__OS2__) && !defined(__DOS__) && defined(SIGPIPE)
	setsignal (SIGPIPE, SIG_IGN, 0);
#endif
}

static void unset_intr_run (void)
{
	qse_clear_intr_handler ();
#if !defined(_WIN32) && !defined(__OS2__) && !defined(__DOS__) && defined(SIGPIPE)
	setsignal (SIGPIPE, SIG_DFL, 0);
#endif
}


#if defined(QSE_ENABLE_SEDTRACER)
static void trace_exec (qse_sed_t* sed, qse_sed_tracer_op_t op, const qse_sed_cmd_t* cmd)
{
	switch (op)
	{
		case QSE_SED_TRACER_READ:
			/*qse_fprintf (QSE_STDERR, QSE_T("reading...\n"));*/
			break;
		case QSE_SED_TRACER_WRITE:
			/*qse_fprintf (QSE_STDERR, QSE_T("wrting...\n"));*/
			break;

		/* TODO: use function to get hold space and pattern space and print them */

		case QSE_SED_TRACER_MATCH:
			qse_fprintf (QSE_STDERR, QSE_T("%s:%lu [%c] MA\n"), 
				((cmd->lid && cmd->lid[0])? cmd->lid: QSE_T("<<UNKNOWN>>")), 
				(unsigned long)cmd->loc.line,
				cmd->type
			);
			break;

		case QSE_SED_TRACER_EXEC:
			qse_fprintf (QSE_STDERR, QSE_T("%s:%lu [%c] EC\n"), 
				((cmd->lid && cmd->lid[0])? cmd->lid: QSE_T("<<UNKNOWN>>")), 
				(unsigned long)cmd->loc.line,
				cmd->type
			);
			break;
	}
}
#endif

struct xarg_t
{
	qse_mmgr_t*  mmgr;
	qse_char_t** ptr;
	qse_size_t   size;
	qse_size_t   capa;
};

typedef struct xarg_t xarg_t;

static int collect_into_xarg (const qse_cstr_t* path, void* ctx)
{
	xarg_t* xarg = (xarg_t*)ctx;

	if (xarg->size <= xarg->capa)
	{
		qse_char_t** tmp;

		tmp = QSE_MMGR_REALLOC (xarg->mmgr, xarg->ptr, QSE_SIZEOF(*tmp) * (xarg->capa + 128));
		if (tmp == QSE_NULL) return -1;

		xarg->ptr = tmp;
		xarg->capa += 128;
	}

	xarg->ptr[xarg->size] = qse_strdup (path->ptr, xarg->mmgr);
	if (xarg->ptr[xarg->size] == QSE_NULL) return -1;
	xarg->size++;

	return 0;
}

static void purge_xarg (xarg_t* xarg)
{
	if (xarg->ptr)
	{
		qse_size_t i;

		for (i = 0; i < xarg->size; i++)
			QSE_MMGR_FREE (xarg->mmgr, xarg->ptr[i]);
		QSE_MMGR_FREE (xarg->mmgr, xarg->ptr);

		xarg->size = 0;
		xarg->capa = 0;
		xarg->ptr = QSE_NULL;
	}
}

static int expand_wildcards (int argc, qse_char_t* argv[], int glob, xarg_t* xarg)
{
	int i;
	qse_cstr_t tmp;

	for (i = 0; i < argc; i++)
	{
		int x;

		if (glob)
		{
		#if defined(_WIN32) || defined(__OS2__) || defined(__DOS__)
			int glob_flags = QSE_GLOB_TOLERANT | QSE_GLOB_PERIOD | QSE_GLOB_NOESCAPE | QSE_GLOB_IGNORECASE;
		#else
			int glob_flags = QSE_GLOB_TOLERANT | QSE_GLOB_PERIOD;
		#endif

			x = qse_glob (
				argv[i], collect_into_xarg, xarg,
				glob_flags, xarg->mmgr, qse_getdflcmgr()
			);

			if (x <= -1) return -1;
		}
		else x = 0;

		if (x == 0)
		{
			/* not expanded. just use it as is */
			tmp.ptr = argv[i];
			tmp.len = qse_strlen(argv[i]);
			if (collect_into_xarg (&tmp, xarg) <= -1) return -1;
		}
	}

	return 0;
}

static int sed_main (int argc, qse_char_t* argv[])
{
	qse_mmgr_t* mmgr = QSE_MMGR_GETDFL();
	qse_sed_t* sed = QSE_NULL;
	qse_fs_t* fs = QSE_NULL;
	qse_size_t script_count;
	int ret = -1;

	xarg_t xarg;
	int xarg_inited = 0;

	ret = handle_args (argc, argv);
	if (ret <= -1) return -1;
	if (ret == 0) return 0;

	ret = -1;

#if defined(QSE_BUILD_DEBUG)
	if (g_failmalloc > 0)
	{
		debug_mmgr.ctx = QSE_NULL;
		mmgr = &debug_mmgr;
	}
	else
#endif
	if (g_memlimit > 0)
	{
		xma_mmgr.ctx = qse_xma_open (QSE_MMGR_GETDFL(), 0, QSE_NULL, g_memlimit);
		if (xma_mmgr.ctx == QSE_NULL)
		{
			qse_printf (QSE_T("ERROR: cannot open memory heap\n"));
			goto oops;
		}
		mmgr = &xma_mmgr;
	}

	if (g_separate && g_infile_pos > 0 && g_inplace)
	{
		fs = qse_fs_open (mmgr, 0);
		if (fs == QSE_NULL)
		{
			qse_fprintf (QSE_STDERR, QSE_T("ERROR: cannot open file system handler\n"));
			goto oops;
		}

		if (qse_fs_chdir (fs, QSE_T(".")) <= -1)
		{
			qse_fprintf (QSE_STDERR, 
				QSE_T("ERROR: cannot change direcotry in file system handler\n"));
			goto oops;
		}
	}

	sed = qse_sed_openstdwithmmgr (mmgr, 0, QSE_NULL);
	if (!sed)
	{
		qse_fprintf (QSE_STDERR, QSE_T("ERROR: cannot open stream editor\n"));
		goto oops;
	}

	qse_sed_setopt (sed, QSE_SED_TRAIT, &g_option);

	if (qse_sed_compstd (sed, g_script.io, &script_count) <= -1)
	{
		const qse_sed_loc_t* errloc;
		const qse_char_t* target;
		qse_char_t exprbuf[128];

		errloc = qse_sed_geterrloc(sed);
	
		if (g_script.io[script_count].type == QSE_SED_IOSTD_FILE)
		{
			target = g_script.io[script_count].u.file.path;
		}
		else 
		{
			/* i dont' use QSE_SED_IOSTD_SIO for input */	
			QSE_ASSERT (g_script.io[script_count].type == QSE_SED_IOSTD_STR);
			qse_fmtuintmax (exprbuf, QSE_COUNTOF(exprbuf),
				script_count, 10, -1, QSE_T('\0'), QSE_T("expression #"));
			target = exprbuf;
		}

		if (errloc->line > 0 || errloc->colm > 0)
		{
			qse_fprintf (QSE_STDERR, 
				QSE_T("ERROR: cannot compile %s - %s at line %lu column %lu\n"),
				target,
				qse_sed_geterrmsg(sed),
				(unsigned long)errloc->line,
				(unsigned long)errloc->colm
			);
		}
		else
		{
			qse_fprintf (QSE_STDERR, 
				QSE_T("ERROR: cannot compile %s - %s\n"),
				target,
				qse_sed_geterrmsg(sed)
			);
		}
		goto oops;
	}

#if defined(QSE_ENABLE_SEDTRACER)
	if (g_trace) qse_sed_setopt (sed, QSE_SED_TRACER, trace_exec);
#endif

	qse_memset (&xarg, 0, QSE_SIZEOF(xarg));
	xarg.mmgr = qse_sed_getmmgr(sed);
	xarg_inited = 1;

	if (g_separate && g_infile_pos > 0)
	{
		/* 's' and input files are specified on the command line */
		qse_sed_iostd_t out_file;
		qse_sed_iostd_t out_inplace;
		qse_sed_iostd_t* output_file = QSE_NULL;
		qse_sed_iostd_t* output = QSE_NULL;
		int inpos;

		/* a dash is treated specially for QSE_SED_IOSTD_FILE in
		 * qse_sed_execstd(). so make an exception here */
		if (g_output_file && 
		    qse_strcmp (g_output_file, QSE_T("-")) != 0)
		{
			out_file.type = QSE_SED_IOSTD_SIO;
			out_file.u.sio = qse_sio_open (
				qse_sed_getmmgr(sed),
				0,
				g_output_file,
				QSE_SIO_WRITE |
				QSE_SIO_CREATE |
				QSE_SIO_TRUNCATE |
				QSE_SIO_IGNOREMBWCERR
			);
			if (out_file.u.sio == QSE_NULL)
			{
				qse_fprintf (QSE_STDERR, QSE_T("ERROR: cannot open %s\n"), g_output_file);
				goto oops;
			}

			output_file = &out_file;
			output = output_file;
		}

		/* perform wild-card expansions for non-unix platforms */
		if (expand_wildcards (argc - g_infile_pos, &argv[g_infile_pos], g_wildcard, &xarg) <= -1)
		{
			qse_fprintf (QSE_STDERR, QSE_T("ERROR: out of memory\n"));
			goto oops;
		}

		for (inpos = 0; inpos < xarg.size; inpos++)
		{
			qse_sed_iostd_t in[2];
			qse_char_t* tmpl_tmpfile;
			
			in[0].type = QSE_SED_IOSTD_FILE;
			in[0].u.file.path = xarg.ptr[inpos];
			in[0].u.file.cmgr = g_infile_cmgr;
			in[1].type = QSE_SED_IOSTD_NULL;

			tmpl_tmpfile = QSE_NULL;
			if (g_inplace && in[0].u.file.path)
			{
				int retried = 0;

				tmpl_tmpfile = qse_strdup2 (in[0].u.file.path, QSE_T(".XXXX"),  qse_sed_getmmgr(sed));
				if (tmpl_tmpfile == QSE_NULL)
				{
					qse_fprintf (QSE_STDERR, QSE_T("ERROR: out of memory\n"));
					goto oops;
				}

			open_temp:
				out_inplace.type = QSE_SED_IOSTD_SIO;
				out_inplace.u.sio = qse_sio_open (
					qse_sed_getmmgr(sed),
					0,
					tmpl_tmpfile,
					QSE_SIO_WRITE |
					QSE_SIO_CREATE |
					QSE_SIO_IGNOREMBWCERR |
					QSE_SIO_EXCLUSIVE |
					QSE_SIO_TEMPORARY
				);
				if (out_inplace.u.sio == QSE_NULL)
				{
					if (retried) 
					{
						qse_fprintf (QSE_STDERR, QSE_T("ERROR: cannot open %s\n"), tmpl_tmpfile);
						QSE_MMGR_FREE (qse_sed_getmmgr(sed), tmpl_tmpfile);
						goto oops;
					}
					else
					{
						/* retry to open the file with shorter names */
						QSE_MMGR_FREE (qse_sed_getmmgr(sed), tmpl_tmpfile);
						tmpl_tmpfile = qse_strdup (QSE_T("TMP-XXXX"),  qse_sed_getmmgr(sed));
						if (tmpl_tmpfile == QSE_NULL)
						{
							qse_fprintf (QSE_STDERR, QSE_T("ERROR: out of memory\n"));
							goto oops;
						}
						retried = 1;
						goto open_temp;
					}
				}

				output = &out_inplace;
			}

			if (qse_sed_execstd (sed, in, output) <= -1)
			{
				if (output) qse_sio_close (output->u.sio);

				if (tmpl_tmpfile) 
				{
					qse_fs_rmfile (fs, tmpl_tmpfile, 0);
					QSE_MMGR_FREE (qse_sed_getmmgr(sed), tmpl_tmpfile);
				}
				print_exec_error (sed);
				goto oops;
			}

			if (tmpl_tmpfile)
			{
				QSE_ASSERT (output == &out_inplace);
				qse_sio_close (output->u.sio);
				output = output_file;

				if (qse_fs_move (fs, tmpl_tmpfile, in[0].u.file.path) <= -1)
				{
					qse_fprintf (QSE_STDERR, QSE_T("ERROR: cannot rename %s to %s. not deleting %s\n"), 
						tmpl_tmpfile, in[0].u.file.path, tmpl_tmpfile);
					QSE_MMGR_FREE (qse_sed_getmmgr(sed), tmpl_tmpfile);
					goto oops;
				}

				QSE_MMGR_FREE (qse_sed_getmmgr(sed), tmpl_tmpfile);
			}

			if (qse_sed_ishalt (sed)) break;
		}

		if (output) qse_sio_close (output->u.sio);
	}
	else
	{
		int xx;
		qse_sed_iostd_t* in = QSE_NULL;
		qse_sed_iostd_t out;

		if (g_infile_pos > 0)
		{
			int i;
			const qse_char_t* tmp;

			/* input files are specified on the command line */

			/* perform wild-card expansions for non-unix platforms */
			if (expand_wildcards (argc - g_infile_pos, &argv[g_infile_pos], g_wildcard, &xarg) <= -1)
			{
				qse_fprintf (QSE_STDERR, QSE_T("ERROR: out of memory\n"));
				goto oops;
			}

			in = QSE_MMGR_ALLOC (qse_sed_getmmgr(sed), QSE_SIZEOF(*in) * (xarg.size + 1));
			if (in == QSE_NULL)
			{
				qse_fprintf (QSE_STDERR, QSE_T("ERROR: out of memory\n"));
				goto oops;
			}

			for (i = 0; i < xarg.size; i++)
			{
				in[i].type = QSE_SED_IOSTD_FILE;
				tmp = xarg.ptr[i];
				in[i].u.file.path = tmp;
				in[i].u.file.cmgr = g_infile_cmgr;
			}

			in[i].type = QSE_SED_IOSTD_NULL;
		}

		if (g_output_file)
		{
			out.type = QSE_SED_IOSTD_FILE;
			out.u.file.path = g_output_file;
			out.u.file.cmgr = g_outfile_cmgr;
		}
		else
		{
			/* arrange to be able to specify cmgr.
			 * if not for cmgr, i could simply pass QSE_NULL 
			 * to qse_sed_execstd() below like
			 *   xx = qse_sed_execstd (sed, in, QSE_NULL); */
			out.type = QSE_SED_IOSTD_FILE;
			out.u.file.path = QSE_NULL;
			out.u.file.cmgr = g_outfile_cmgr;
		}

		g_sed = sed;
		set_intr_run ();
		xx = qse_sed_execstd (sed, in, &out);
		if (in) QSE_MMGR_FREE (qse_sed_getmmgr(sed), in);
		unset_intr_run ();
		g_sed = QSE_NULL;

		if (xx <= -1)
		{
			print_exec_error (sed);
			goto oops;
		}
	}

	ret = 0;

oops:
	if (xarg_inited) purge_xarg (&xarg);
	if (sed) qse_sed_close (sed);
	if (fs) qse_fs_close (fs);
	if (xma_mmgr.ctx) qse_xma_close (xma_mmgr.ctx);
	free_scripts ();

#if defined(QSE_BUILD_DEBUG)
	if (g_failmalloc > 0)
	{
		qse_fprintf (QSE_STDERR, QSE_T("\n"));
		qse_fprintf (QSE_STDERR, QSE_T("-[MALLOC COUNTS]---------------------------------------\n"));
		qse_fprintf (QSE_STDERR, QSE_T("ALLOC: %lu FREE: %lu: REALLOC: %lu\n"), 
			(unsigned long)debug_mmgr_alloc_count,
			(unsigned long)debug_mmgr_free_count,
			(unsigned long)debug_mmgr_realloc_count);
		qse_fprintf (QSE_STDERR, QSE_T("-------------------------------------------------------\n"));
	}
#endif
	return ret;
}

int qse_main (int argc, qse_achar_t* argv[])
{
	int ret;
#if defined(_WIN32)
	char locale[100];
	UINT codepage;
#else
	/* nothing */
#endif

#if defined(_WIN32)
	codepage = GetConsoleOutputCP();	
	if (codepage == CP_UTF8)
	{
		/*SetConsoleOUtputCP (CP_UTF8);*/
		qse_setdflcmgrbyid (QSE_CMGR_UTF8);
	}
	else
	{
		/* .codepage */
		qse_fmtuintmaxtombs (locale, QSE_COUNTOF(locale),
			codepage, 10, -1, QSE_MT('\0'), QSE_MT("."));
		setlocale (LC_ALL, locale);
		/*qse_setdflcmgrbyid (QSE_CMGR_SLMB);*/
	}
#else
	setlocale (LC_ALL, "");
	/*qse_setdflcmgrbyid (QSE_CMGR_SLMB);*/
#endif

	qse_open_stdsios ();
	ret = qse_run_main (argc, argv, sed_main);
	qse_close_stdsios ();

	return ret;
}