qse/qse/lib/xli/read-ini.c

/*
 * $Id$
 *
    Copyright (c) 2006-2014 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 "xli.h"
#include <qse/cmn/chr.h>

/*
 * [SECTION1]
 * key1 = value1
 * key2 = value2
 * [SECTION2]
 * key1 = value1
 * --------------------------------
 *
 * SECTION1 = {
 *   key1 = value1;
 *   key2 = value2;
 * }
 * SECTION2 = {
 *   key1 = value1;
 * }
 */

#define GET_CHAR(xli) \
	do { if (qse_xli_getchar(xli) <= -1) return -1; } while(0)

#define GET_CHAR_TO(xli,c) \
	do { \
		if (qse_xli_getchar(xli) <= -1) return -1; \
		c = (xli)->rio.last.c; \
	} while(0)

#define ADD_TOKEN_CHAR(xli,tok,c) \
	do { \
		if (qse_str_ccat((tok)->name,(c)) == (qse_size_t)-1) \
		{ \
			qse_xli_seterrnum (xli, QSE_XLI_ENOMEM, QSE_NULL); \
			return -1; \
		} \
	} while (0)

#define ADD_TOKEN_STR(xli,tok,s,l) \
	do { \
		if (qse_str_ncat((tok)->name,(s),(l)) == (qse_size_t)-1) \
		{ \
			qse_xli_seterrnum (xli, QSE_XLI_ENOMEM, QSE_NULL); \
			return -1; \
		} \
	} while (0)


static int skip_spaces (qse_xli_t* xli)
{
	qse_cint_t c = xli->rio.last.c;
	while (QSE_ISSPACE(c)) GET_CHAR_TO (xli, c);
	return 0;
}

static int skip_comment (qse_xli_t* xli, qse_xli_tok_t* tok)
{
	qse_cint_t c = xli->rio.last.c;

	if (c == QSE_T(';'))
	{
		/* skip up to \n */
		/* TODO: support a different line terminator */
		qse_str_clear (tok->name);

		do
		{ 
			GET_CHAR_TO (xli, c); 
			if (c == QSE_T('\n') || c == QSE_CHAR_EOF) break;

			if  (xli->opt.trait & QSE_XLI_KEEPTEXT) ADD_TOKEN_CHAR (xli, tok, c);
		}
		while (1);

		if ((xli->opt.trait & QSE_XLI_KEEPTEXT) && 
		    qse_xli_inserttext (xli, xli->parlink->list, QSE_NULL, QSE_STR_PTR(tok->name)) == QSE_NULL) return -1;

		GET_CHAR (xli); /* eat the new line letter */
		return 1; /* comment by # */
	}

	return 0; 
}

static int get_token_into (qse_xli_t* xli, qse_xli_tok_t* tok)
{
	qse_cint_t c;
	int n;

/*retry:*/
	do 
	{
		if (skip_spaces (xli) <= -1) return -1;
		if ((n = skip_comment (xli, tok)) <= -1) return -1; 
	} 
	while (n >= 1);

	qse_str_clear (tok->name);
	tok->loc.file = xli->rio.last.file;
	tok->loc.line = xli->rio.last.line;
	tok->loc.colm = xli->rio.last.colm;

	c = xli->rio.last.c;

	if (c == QSE_CHAR_EOF) 
	{
#if 0
		n = end_include (xli, 0);
		if (n <= -1) return -1;
		if (n >= 1) 
		{
			/*xli->rio.last = xli->rio.inp->last;*/
			/* mark that i'm retrying after end of an included file */
			skip_semicolon_after_include = 1; 
			goto retry;
		}

		ADD_TOKEN_STR (xli, tok, QSE_T("<EOF>"), 5);
		SET_TOKEN_TYPE (xli, tok, TOK_EOF); 
#endif
	}
}

static int __read_list (qse_xli_t* xli, const qse_xli_scm_t* override)
{
	return 0;
}

static int read_root_list (qse_xli_t* xli)
{
	qse_xli_list_link_t* link;

	link = qse_xli_makelistlink (xli, &xli->root->list);
	if (!link) return -1;

	if (qse_xli_getchar (xli) <= -1 || __read_list (xli, QSE_NULL) <= -1)
	{
		qse_xli_freelistlink (xli, link);
		return -1;
	}

	QSE_ASSERT (link == xli->parlink);
	qse_xli_freelistlink (xli, link);

	return 0;
}

int qse_xli_readini (qse_xli_t* xli, qse_xli_io_impl_t io)
{
	if (!io)
	{
		qse_xli_seterrnum (xli, QSE_XLI_EINVAL, QSE_NULL); 
		return -1;
	}

	QSE_MEMSET (&xli->rio, 0, QSE_SIZEOF(xli->rio));
	xli->rio.impl = io;
	xli->rio.top.line = 1;
	xli->rio.top.colm = 1;
	xli->rio.inp = &xli->rio.top;

	qse_xli_seterrnum (xli, QSE_XLI_ENOERR, QSE_NULL); 
	qse_xli_clearrionames (xli);

	QSE_ASSERT (QSE_STR_LEN(xli->dotted_curkey) == 0);

	if (qse_xli_openstream (xli, xli->rio.inp) <= -1) return -1;
	/* the input stream is open now */

	if (read_root_list (xli) <= -1) goto oops;

	QSE_ASSERT (xli->parlink == QSE_NULL);

/*
	if (!MATCH (xli, TOK_EOF))
	{
		qse_xli_seterror (xli, QSE_XLI_ESYNTAX, QSE_NULL, &xli->tok.loc);
		goto oops;
	}
*/

	QSE_ASSERT (xli->rio.inp == &xli->rio.top);
	qse_xli_closecurrentstream (xli);
	qse_str_clear (xli->tok.name);
	return 0;

oops:
	/* an error occurred and control has reached here
	 * probably, some included files might not have been 
	 * closed. close them */
	while (xli->rio.inp != &xli->rio.top)
	{
		qse_xli_io_arg_t* prev;

		/* nothing much to do about a close error */
		qse_xli_closecurrentstream (xli);

		prev = xli->rio.inp->prev;
		QSE_ASSERT (xli->rio.inp->name != QSE_NULL);
		QSE_MMGR_FREE (xli->mmgr, xli->rio.inp);
		xli->rio.inp = prev;
	}
	
	qse_xli_closecurrentstream (xli);
	qse_str_clear (xli->tok.name);
	return -1;
}