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%%	options

copyright owner	=	Dirk Krause
copyright year	=	2016-xxxx
license			=	bsd


%%	header

/**	@file	dk4papea.h	Paper sizes for applications.
*/

#ifndef	DK4PAPER_H_INCLUDED
#include "dk4paper.h"
#endif

#ifndef	DK4APP_H_INCLUDED
#include "dk4app.h"
#endif

#ifdef	__cplusplus
extern "C" {
#endif


/**	Get paper sizes collection.
	If the function returns a valid pointer, use
	dk4papersize_coll_close() to release the paper size collection when
	done with it.
	@param	app	Application structure.
	@return	Valid pointer on success, NULL on error.
*/

dk4_paper_size_collection_t *
dk4app_get_paper_sizes(dk4_app_t *app);


/**	Get one paper size.
	On success, call dk4mem_free() to release the paper size when done with it.
	The paper size is returned with values only, empty name.
	@param	app		Application structure.
	@param	psname	Name of paper size to search for.
	@return	Valid pointer to paper size on success, NULL on error.
*/

dk4_paper_size_t *
dk4app_get_paper_size(dk4_app_t *app, const dkChar *psname);


#ifdef	__cplusplus
}
#endif


/* vim: set ai sw=4 ts=4 : */
%%	module


#include "dk4papea.h"
#include "dk4strd.h"
#include "dk4mem.h"
#include "dk4maiddbl.h"
#include "dk4tspdk.h"
#include "dk4fs.h"
#include "dk4mpl.h"
#include "dk4strm.h"
#include "dk4strmr.h"



$!trace-include



/**	Object passed as pointer to the reader function
*/
typedef struct {
	dk4_paper_size_collection_t	*pscptr;
	dk4_app_t					*app;
} reader_obj_t;



/**	Names of files to read.
*/
static const dkChar * const conf_file_names[] = {
	dkT("dk4paper.conf"),
#if	DK4_HAVE_COMPATDKTOOLS3
	dkT("dk3paper.conf"),
#endif
	NULL
};



/**	Process one input line.
	@param	obj		Reader object.
	@param	line	Current line to process.
	@param	lineno	Line number.
	@param	erp		Error report, may be NULL.
	@return	
	DK4_TSP_RES_OK		if processing succeeded,
	DK4_TSP_RES_ERROR	on errors (can continue),
	DK4_TSP_RES_FATAL	on fatal errors (can not continue).

*/

static
int
dk4papersize_line_handler(
	void			*obj,
	dkChar			*line,
	dk4_um_t		 lineno,
	dk4_er_t		*erp
)
{
	double						 val[6];	/* w, h, i, o, t, b */
	dkChar						*tok[16];	/* tokens from the value side */
	dk4_paper_size_collection_t	*pscptr;	/* collection of paper sizes */
	dk4_paper_size_t			*ps;		/* paper size to modify */
	dkChar						*pls;		/* line start (size name) */
	dkChar						*pval;		/* value side of line */
	const dkChar				*ep;		/* end pointer after double value */
	dk4_app_t					*app;		/* application structure */
	reader_obj_t				*rdo;		/* reader object */
	size_t						 ntok;		/* number of tokens in value side */
	size_t						 i;			/* index for traversal */
	int							 back	= DK4_TSP_RES_OK;
	$? "+ dk4papersize_line_handler \"%!ds\"", line
	/*	Retrieve components from obj pointer
	*/
	rdo = (reader_obj_t *)obj;
	pscptr = rdo->pscptr;
	app    = rdo->app;
	dk4app_set_log_source_line(app, lineno);
	/*
		Find start of line
	*/
	pls = dk4str_start(line, NULL);
	if (NULL == pls) {						$? ". empty line"
		goto finished;
	}
	/*
		Ignore comment lines
	*/
	if (dkT('#') == *pls) {					$? ". comment line"
		goto finished;
	}
	/*
		Line must by key = values
	*/
	pval = dk4str_chr(pls, dkT('='));
	if (NULL == pval) {						$? "! no = found"
		/* ERROR: Syntax */
		dk4app_log_base1(app, DK4_LL_WARNING, 159);
		back = DK4_TSP_RES_ERROR;
		goto finished;
	}										$? ". found ="
	*(pval++) = dkT('\0');
	dk4str_rtwh(pls, NULL);
	if (0 == dk4str_len(pls)) {				$? "! 0 name length"
		/* ERROR: Syntax */
		dk4app_log_base1(app, DK4_LL_WARNING, 159);
		back = DK4_TSP_RES_ERROR;
		goto finished;
	}										$? ". name length ok"
	pval = dk4str_start(pval, NULL);
	if (NULL == pval) {						$? "! pval"
		/* ERROR: Syntax */
		dk4app_log_base1(app, DK4_LL_WARNING, 159);
		back = DK4_TSP_RES_ERROR;
		goto finished;
	}										$? ". pval"
	/*
		Tokenize string
	*/
	ntok = dk4str_tokenize(tok, 16, pval, NULL, NULL);
	if ((2 > ntok) || (6 < ntok)) {			$? "! wrong number of tokens"
		/* ERROR: Syntax */
		dk4app_log_base1(app, DK4_LL_WARNING, 159);
		back = DK4_TSP_RES_ERROR;
		goto finished;
	}										$? ". number of tokens ok"
	/*
		Initialize values
	*/
	for (i = 0; i < 6; i++) { val[i] = 0.0; }
	/*
		Process tokens to values
	*/
	for (i = 0; i < ntok; i++) {
		ep = NULL;							$? ". token=\"%!ds\"", tok[i]
		if (0 == dk4ma_input_dk_double(&(val[i]), tok[i], &ep, 1, NULL)) {
			/* ERROR: Syntax */
			dk4app_log_base1(app, DK4_LL_WARNING, 159);
			back = DK4_TSP_RES_ERROR;		$? "! token=\"%!ds\"", tok[i]
			goto finished;
		}
	}
	/*
		Modify existing or create new papersize
	*/
	ps = (dk4_paper_size_t *)dk4sto_it_find_like(pscptr->i_ps, pls, 1);
	if (NULL == ps) {						$? ". must create new paper size"
		ps = dk4papersize_new(pls, NULL);
		if (NULL != ps) {					$? ". paper size created"
			if (0 == dk4sto_add(pscptr->s_ps, ps, NULL)) {
				dk4papersize_delete(ps);	$? "! failed to add"
				ps = NULL;
			}
		}
#if TRACE_DEBUG
		else {								$? "! memory"
		}
#endif
	}
	if (NULL == ps) {						$? "! no paper size to set up"
		/* ERROR: Memory */
		dk4app_log_base1(app, DK4_LL_WARNING, 90);
		back = DK4_TSP_RES_ERROR;
		goto finished;
	}										$? ". paper size available"
	ps->w = val[0]; ps->h = val[1]; ps->i = val[2];
	ps->o = val[3]; ps->t = val[4]; ps->b = val[5];

	finished:
	$? "- dk4papersize_line_handler %d", back
	return back;
}



/**	Apply contents of one configuration file to paper size collection.
	@param	pscptr	Paper size collection to modify.
	@param	fn		File name.
	@param	app		Application structure.
*/
static
void
dk4app_apply_paper_size_file(
	dk4_paper_size_collection_t	*pscptr,
	const dkChar				*fn,
	dk4_app_t					*app
)
{
	char			 ib[4096];						/* Byte buffer */
	dkChar			 il[1024];						/* Text line buffer */
	dk4_tspdk_t		 tsp;							/* Text stream processor */
	dk4_er_t		 er;							/* Error report */
	reader_obj_t	 rdo;							/* Passed to text proc */
	const dkChar	*oldsourcefile	= NULL;			/* Saved source file name */
	dk4_stream_t	*istrm			= NULL;			/* Input stream */
	dk4_um_t		 oldsourceline	= (dk4_um_t)0UL;	/* Saved source line */
	size_t			 rb				= 0;			/* Number of bytes read */
	int				 cc				= 1;			/* Flag: Can continue */
	int				 res			= 0;			/* Operation result */
	$? "+ dk4app_apply_paper_size_file \"%!ds\"", fn
	/*	Save current file name and file line for logging
	*/
	oldsourcefile = dk4app_get_log_source_file(app);
	oldsourceline = dk4app_get_log_source_line(app);
	/*
		We will process the specified input file, so set file name for logging
	*/
	dk4app_set_log_source_file(app, fn);
	dk4app_set_log_source_line(app, (dk4_um_t)0UL);
	/*
		Open stream for read access
	*/
	dk4error_init(&er);
	istrm = dk4stream_open_file_reader(fn, &er);
	if (NULL == istrm) {						$? "! failed to open file"
		goto finished;
	}											$? ". file opened"
	/*
		Set up reader object
	*/
	rdo.pscptr = pscptr;
	rdo.app = app;
	/*
		Set up text processor
	*/
	res = dk4tspdk_setup_line(
		&tsp, &rdo, dk4papersize_line_handler, il, DK4_SIZEOF(il,dkChar),
		app->encoding, app->enc_in_file, &er
	);
	if (0 == res) {								$? "! failed to init tsp"
		goto finished;
	}											$? ". tsp initialized"
	/*
		Read and process contents from stream
	*/
	res = DK4_TSP_RES_OK;
	do {										$? ". start of loop"
		cc = 0;
		rb = sizeof(ib);
		if (0 != dk4stream_read(ib, &rb, istrm, &er)) {	$? ". read ok"
			if (0 < rb) {						$? ". bytes found"
				res = dk4tspdk_add_bytes(&tsp, (const unsigned char *)ib, rb);
				if (DK4_TSP_RES_FATAL != res) {	$? ". byte processing ok"
					cc = 1;
				}
			}
#if TRACE_DEBUG
			else {								$? ". 0 read"
			}
#endif
		}
#if	TRACE_DEBUG
		else {									$? "! read failed"
		}
#endif
		$? ". end of loop cc=%d", cc
	} while (1 == cc);
	if (DK4_TSP_RES_FATAL != res) {
		dk4tspdk_finish(&tsp);
	}

	finished:
	/*
		Close input stream
	*/
	if (NULL != istrm) { dk4stream_close(istrm, NULL); }
	/*
		Restore file name and file line for logging
	*/
	dk4app_set_log_source_file(app, oldsourcefile);
	dk4app_set_log_source_line(app, oldsourceline);
	$? "- dk4app_apply_paper_size_file"
}



dk4_paper_size_collection_t *
dk4app_get_paper_sizes(dk4_app_t *app)
{
	dkChar						 fnb[DK4_MAX_PATH];	/* File name buffer */
	dk4_er_t					 er;				/* Error result */
	const dkChar				*msg[3];
	dk4_paper_size_collection_t	*back	= NULL;		/* Function result */
	const size_t				 szfnb	= DK4_SIZEOF(fnb,dkChar);	/* Size */
	int							 res;				/* Operation result */
	int							 i;					/* Index for traversal */
	$? "+ dk4app_get_paper_sizes"
	/*	Check app pointer
	*/
	if (NULL == app) {							$? "! invalid app pointer"
		goto finished;
	}
	/*	Allocate new size collection with default sizes
	*/
	back = dk4papersize_coll_open(NULL);
	if (NULL == back) {							$? "! memory"
		/* ERROR: Memory */
		dk4app_log_base1(app, DK4_LL_WARNING, 90);
		goto finished;
	}
	/*	Find all configuration files and apply contents.
	*/
	if (0 != dk4app_log_do(app, DK4_LL_DEBUG)) {
		if ((NULL != app->msg_debug) && (36 < app->sz_msg_debug)) {
			msg[0] = (app->msg_debug)[36];
			dk4app_log_msg(app, DK4_LL_DEBUG, msg, 1);
		}
	}
	for (i = 0; i <= DK4_FS_CONF_MAX; i++) {	$? ". pass %u", (unsigned)i
#if DK4_HAVE_COMPATDKTOOLS3
#if VERSION_BEFORE_2017_03_09
		dk4error_init(&er);
		res = dk4fs_config_compat_one(
			fnb, szfnb, conf_file_names[1],
			app->dir_share, app->dir_etc, app->user_home,
			app->prog_name, app->group_name, i, 1, 1, &er
	    );
		if (0 != res) {							$? ". dk3paper.conf"
			dk4app_apply_paper_size_file(back, fnb, app);
		}
#else
		dk4error_init(&er);
		res = dk4fs_config_construct_compat_one(
			fnb, szfnb, conf_file_names[1],
			app->dir_share, app->dir_etc, app->user_home,
			app->prog_name, app->group_name, i, 1, &er
		);
		if (0 != res) {
			res = dk4fs_attempt_file_name(fnb, szfnb, 1, &er);
			if (0 != res) {
				if (0 != dk4app_log_do(app, DK4_LL_DEBUG)) {
					if ((NULL != app->msg_debug) && (30 < app->sz_msg_debug)) {
						msg[0] = (app->msg_debug)[30];
						msg[1] = fnb;
						dk4app_log_msg(app, DK4_LL_DEBUG, msg, 2);
					}
				}
				dk4app_apply_paper_size_file(back, fnb, app);
			} else {
				if (0 != dk4app_log_do(app, DK4_LL_DEBUG)) {
					if ((NULL != app->msg_debug) && (31 < app->sz_msg_debug)) {
						msg[0] = (app->msg_debug)[31];
						msg[1] = fnb;
						dk4app_log_msg(app, DK4_LL_DEBUG, msg, 2);
					}
				}
			}
		}
#endif
#endif

#if VERSION_BEFORE_2017_03_09
		dk4error_init(&er);
		res = dk4fs_config_one(
			fnb, szfnb, conf_file_names[0],
			app->dir_share, app->dir_etc, app->user_home,
			app->prog_name, app->group_name, i, 1, &er
		);
		if (0 != res) {							$? ". dk4paper.conf"
			dk4app_apply_paper_size_file(back, fnb, app);
		}
#else
		dk4error_init(&er);
		res = dk4fs_config_construct_compat_one(
			fnb, szfnb, conf_file_names[0],
			app->dir_share, app->dir_etc, app->user_home,
			app->prog_name, app->group_name, i, 0, &er
		);
		if (0 != res) {
			res = dk4fs_attempt_file_name(fnb, szfnb, 1, &er);
			if (0 != res) {
				if (0 != dk4app_log_do(app, DK4_LL_DEBUG)) {
					if ((NULL != app->msg_debug) && (30 < app->sz_msg_debug)) {
						msg[0] = (app->msg_debug)[30];
						msg[1] = fnb;
						dk4app_log_msg(app, DK4_LL_DEBUG, msg, 2);
					}
				}
				dk4app_apply_paper_size_file(back, fnb, app);
			} else {
				if (0 != dk4app_log_do(app, DK4_LL_DEBUG)) {
					if ((NULL != app->msg_debug) && (31 < app->sz_msg_debug)) {
						msg[0] = (app->msg_debug)[31];
						msg[1] = fnb;
						dk4app_log_msg(app, DK4_LL_DEBUG, msg, 2);
					}
				}
			}
		} else {
		}
#endif
	}

	finished:
	$? "- dk4app_get_paper_sizes %d", TR_IPTR(back)
	return back;
}



dk4_paper_size_t *
dk4app_get_paper_size(dk4_app_t *app, const dkChar *psname)
{
	dk4_paper_size_collection_t	*coll	= NULL;	/* Paper sizes collection */
	dk4_paper_size_t			*back	= NULL;	/* Function result */
	dk4_paper_size_t			*tmp	= NULL;	/* Temporary found paper size */
	$? "+ dk4app_get_paper_size \"%!ds\"", TR_STR(psname)
	/*
		Check arguments
	*/
	if ((NULL == app) || (NULL == psname)) {
		goto finished;
	}
	/*
		Retrieve paper size collection
	*/
	coll = dk4app_get_paper_sizes(app);
	if (NULL == coll) {
		goto finished;
	}
	tmp = (dk4_paper_size_t *)dk4sto_it_find_like(coll->i_ps, psname, 1);
	if (NULL == tmp) {
		goto finished;
	}
	back = dk4mem_new(dk4_paper_size_t,1,NULL);
	if (NULL == back) {
		goto finished;
	}
	back->name = NULL;
	back->w = tmp->w;
	back->h = tmp->h;
	back->i = tmp->i;
	back->o = tmp->o;
	back->t = tmp->t;
	back->b = tmp->b;

	finished:
	if (NULL != coll) {
		dk4papersize_coll_close(coll);
	}
	$? "- dk4app_get_paper_size %d", TR_IPTR(back)
	return back;
}




/* vim: set ai sw=4 ts=4 : */