2 * FreeRTOS+FAT FS V1.0.0 (C) 2013 HCC Embedded
\r
4 * The FreeRTOS+FAT SL license terms are different to the FreeRTOS license
\r
7 * FreeRTOS+FAT SL uses a dual license model that allows the software to be used
\r
8 * under a standard GPL open source license, or a commercial license. The
\r
9 * standard GPL license (unlike the modified GPL license under which FreeRTOS
\r
10 * itself is distributed) requires that all software statically linked with
\r
11 * FreeRTOS+FAT SL is also distributed under the same GPL V2 license terms.
\r
12 * Details of both license options follow:
\r
14 * - Open source licensing -
\r
15 * FreeRTOS+FAT SL is a free download and may be used, modified, evaluated and
\r
16 * distributed without charge provided the user adheres to version two of the
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17 * GNU General Public License (GPL) and does not remove the copyright notice or
\r
18 * this text. The GPL V2 text is available on the gnu.org web site, and on the
\r
19 * following URL: http://www.FreeRTOS.org/gpl-2.0.txt.
\r
21 * - Commercial licensing -
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22 * Businesses and individuals who for commercial or other reasons cannot comply
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23 * with the terms of the GPL V2 license must obtain a commercial license before
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24 * incorporating FreeRTOS+FAT SL into proprietary software for distribution in
\r
25 * any form. Commercial licenses can be purchased from
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26 * http://shop.freertos.org/fat_sl and do not require any source files to be
\r
29 * FreeRTOS+FAT SL is distributed in the hope that it will be useful. You
\r
30 * cannot use FreeRTOS+FAT SL unless you agree that you use the software 'as
\r
31 * is'. FreeRTOS+FAT SL is provided WITHOUT ANY WARRANTY; without even the
\r
32 * implied warranties of NON-INFRINGEMENT, MERCHANTABILITY or FITNESS FOR A
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33 * PARTICULAR PURPOSE. Real Time Engineers Ltd. and HCC Embedded disclaims all
\r
34 * conditions and terms, be they implied, expressed, or statutory.
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36 * http://www.FreeRTOS.org
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37 * http://www.FreeRTOS.org/FreeRTOS-Plus
\r
41 #include "../../api/fat_sl.h"
\r
42 #include "../../psp/include/psp_string.h"
\r
51 #include "../../version/ver_fat_sl.h"
\r
52 #if VER_FAT_SL_MAJOR != 3 || VER_FAT_SL_MINOR != 2
\r
53 #error Incompatible FAT_SL version number!
\r
56 static unsigned char _f_emptywritebuffer ( void );
\r
59 /****************************************************************************
\r
67 * filename - file whose length is needed
\r
71 * length of the file
\r
73 ***************************************************************************/
\r
75 long fn_filelength ( const char * filename )
\r
81 if ( _f_setfsname( filename, &fsname ) )
\r
83 return 0; /*invalid name*/
\r
86 if ( _f_checknamewc( fsname.filename, fsname.fileext ) )
\r
88 return 0; /*invalid name*/
\r
91 if ( _f_getvolume() )
\r
93 return 0; /*can't get the size*/
\r
96 if ( !_f_findpath( &fsname, &pos ) )
\r
101 if ( !_f_findfilewc( fsname.filename, fsname.fileext, &pos, &de, 0 ) )
\r
106 if ( de->attr & F_ATTR_DIR )
\r
108 return 0; /*directory*/
\r
111 return (long)_f_getlong( &de->filesize );
\r
112 } /* fn_filelength */
\r
118 /****************************************************************************
\r
120 * _f_emptywritebuffer
\r
122 * empty write buffer if it contains unwritten data
\r
125 * error code or zero if successful
\r
127 ***************************************************************************/
\r
130 static unsigned char _f_emptywritebuffer ( void )
\r
134 ret = _f_writeglsector( gl_file.pos.sector );
\r
140 gl_file.modified = 0;
\r
142 gl_file.pos.sector++;
\r
144 if ( gl_file.pos.sector >= gl_file.pos.sectorend )
\r
146 unsigned long value;
\r
148 gl_volume.fatsector = (unsigned long)-1;
\r
149 ret = _f_getclustervalue( gl_file.pos.cluster, &value );
\r
155 if ( ( value >= 2 ) && ( value < F_CLUSTER_RESERVED ) ) /*we are in chain*/
\r
157 gl_file.prevcluster = gl_file.pos.cluster;
\r
158 _f_clustertopos( value, &gl_file.pos ); /*go to next cluster*/
\r
162 unsigned long nextcluster;
\r
164 ret = _f_alloccluster( &nextcluster );
\r
170 ret = _f_setclustervalue( nextcluster, F_CLUSTER_LAST );
\r
176 ret = _f_setclustervalue( gl_file.pos.cluster, nextcluster );
\r
182 gl_file.prevcluster = gl_file.pos.cluster;
\r
184 _f_clustertopos( nextcluster, &gl_file.pos );
\r
186 return _f_writefatsector();
\r
192 } /* _f_emptywritebuffer */
\r
197 /****************************************************************************
\r
201 * Extend file to a certain size
\r
203 ***************************************************************************/
\r
204 static unsigned char _f_extend ( long size )
\r
206 unsigned long _size;
\r
209 size -= gl_file.filesize;
\r
210 _size = (unsigned long)size;
\r
212 rc = _f_getcurrsector();
\r
218 psp_memset( gl_sector + gl_file.relpos, 0, ( F_SECTOR_SIZE - gl_file.relpos ) );
\r
220 if ( gl_file.relpos + _size > F_SECTOR_SIZE )
\r
222 _size -= ( F_SECTOR_SIZE - gl_file.relpos );
\r
225 if ( _f_emptywritebuffer() )
\r
227 return F_ERR_WRITE;
\r
230 psp_memset( gl_sector, 0, F_SECTOR_SIZE );
\r
231 _size -= ( _size > F_SECTOR_SIZE ? F_SECTOR_SIZE : _size );
\r
236 _size += gl_file.relpos;
\r
239 gl_file.modified = 1;
\r
240 gl_file.filesize += size;
\r
241 gl_file.abspos = gl_file.filesize & ( ~( F_SECTOR_SIZE - 1 ) );
\r
242 gl_file.relpos = _size;
\r
249 /****************************************************************************
\r
253 * subfunction for f_seek it moves position into given offset and read
\r
254 * the current sector
\r
257 * offset - position from start
\r
261 * error code or zero if successful
\r
263 ***************************************************************************/
\r
264 static unsigned char _f_fseek ( long offset )
\r
266 unsigned long cluster;
\r
268 unsigned char ret = F_NO_ERROR;
\r
276 if ( ( (unsigned long) offset <= gl_file.filesize )
\r
277 && ( (unsigned long) offset >= gl_file.abspos )
\r
278 && ( (unsigned long) offset < gl_file.abspos + F_SECTOR_SIZE ) )
\r
280 gl_file.relpos = (unsigned short)( offset - gl_file.abspos );
\r
284 if ( gl_file.modified )
\r
286 ret = _f_writeglsector( (unsigned long)-1 );
\r
289 gl_file.mode = F_FILE_CLOSE; /*cant accessed any more*/
\r
294 if ( gl_file.startcluster )
\r
296 gl_file.abspos = 0;
\r
297 gl_file.relpos = 0;
\r
298 gl_file.prevcluster = 0;
\r
299 gl_file.pos.cluster = gl_file.startcluster;
\r
300 remain = gl_file.filesize;
\r
302 tmp = gl_volume.bootrecord.sector_per_cluster;
\r
303 tmp *= F_SECTOR_SIZE; /* set to cluster size */
\r
306 gl_volume.fatsector = (unsigned long)-1;
\r
307 while ( (unsigned long)offset >= tmp )
\r
309 ret = _f_getclustervalue( gl_file.pos.cluster, &cluster );
\r
312 gl_file.mode = F_FILE_CLOSE;
\r
316 if ( (long) tmp >= remain )
\r
323 gl_file.abspos += tmp;
\r
324 if ( cluster >= F_CLUSTER_RESERVED )
\r
329 gl_file.prevcluster = gl_file.pos.cluster;
\r
330 gl_file.pos.cluster = cluster;
\r
333 _f_clustertopos( gl_file.pos.cluster, &gl_file.pos );
\r
334 if ( remain && offset )
\r
336 while ( ( offset > (long) F_SECTOR_SIZE )
\r
337 && ( remain > (long) F_SECTOR_SIZE ) )
\r
339 gl_file.pos.sector++;
\r
340 offset -= F_SECTOR_SIZE;
\r
341 remain -= F_SECTOR_SIZE;
\r
342 gl_file.abspos += F_SECTOR_SIZE;
\r
346 if ( remain < offset )
\r
348 gl_file.relpos = (unsigned short)remain;
\r
349 ret = _f_extend( gl_file.filesize + offset - remain );
\r
353 gl_file.relpos = (unsigned short)offset;
\r
363 /****************************************************************************
\r
367 * open a file for reading/writing/appending
\r
371 * filename - which file need to be opened
\r
372 * mode - string how to open ("r"-read, "w"-write, "w+"-overwrite, "a"-append
\r
376 * F_FILE pointer if successfully
\r
379 ***************************************************************************/
\r
380 F_FILE * fn_open ( const char * filename, const char * mode )
\r
384 unsigned short date;
\r
385 unsigned short time;
\r
386 unsigned char m_mode = F_FILE_CLOSE;
\r
388 if ( mode[1] == 0 )
\r
390 if ( mode[0] == 'r' )
\r
392 m_mode = F_FILE_RD;
\r
395 if ( mode[0] == 'w' )
\r
397 m_mode = F_FILE_WR;
\r
400 if ( mode[0] == 'a' )
\r
406 if ( ( mode[1] == '+' ) && ( mode[2] == 0 ) )
\r
408 if ( mode[0] == 'r' )
\r
410 m_mode = F_FILE_RDP;
\r
413 if ( mode[0] == 'w' )
\r
415 m_mode = F_FILE_WRP;
\r
418 if ( mode[0] == 'a' )
\r
420 m_mode = F_FILE_AP;
\r
425 if ( m_mode == F_FILE_CLOSE )
\r
427 return 0; /*invalid mode*/
\r
430 if ( _f_setfsname( filename, &fsname ) )
\r
432 return 0; /*invalid name*/
\r
435 if ( _f_checknamewc( fsname.filename, fsname.fileext ) )
\r
437 return 0; /*invalid name*/
\r
440 if ( fsname.filename[0] == '.' )
\r
445 if ( _f_getvolume() )
\r
447 return 0; /*cant open any*/
\r
450 if ( gl_file.mode != F_FILE_CLOSE )
\r
455 psp_memset( &gl_file, 0, 21 );
\r
457 if ( !_f_findpath( &fsname, &gl_file.dirpos ) )
\r
464 case F_FILE_RDP: /*r*/
\r
465 case F_FILE_RD: /*r*/
\r
466 if ( !_f_findfilewc( fsname.filename, fsname.fileext, &gl_file.dirpos, &de, 0 ) )
\r
471 if ( de->attr & F_ATTR_DIR )
\r
473 return 0; /*directory*/
\r
476 gl_file.startcluster = _f_getdecluster( de );
\r
478 if ( gl_file.startcluster )
\r
480 _f_clustertopos( gl_file.startcluster, &gl_file.pos );
\r
481 gl_file.filesize = _f_getlong( &de->filesize );
\r
482 gl_file.abspos = (unsigned long) (-1 * (long) F_SECTOR_SIZE);
\r
483 if ( _f_fseek( 0 ) )
\r
489 #if F_FILE_CHANGED_EVENT
\r
490 if ( m_mode == F_FILE_RDP )
\r
492 _f_createfullname( gl_file.filename, sizeof( gl_file.filename ), fsname.path, fsname.filename, fsname.fileext );
\r
500 case F_FILE_A: /*a*/
\r
501 psp_memcpy( &( gl_file.pos ), &( gl_file.dirpos ), sizeof( F_POS ) );
\r
502 if ( _f_findfilewc( fsname.filename, fsname.fileext, &gl_file.dirpos, &de, 0 ) )
\r
504 if ( de->attr & ( F_ATTR_DIR | F_ATTR_READONLY ) )
\r
509 gl_file.startcluster = _f_getdecluster( de );
\r
510 gl_file.filesize = _f_getlong( &de->filesize );
\r
512 if ( gl_file.startcluster )
\r
514 _f_clustertopos( gl_file.startcluster, &gl_file.pos );
\r
515 gl_file.abspos = (unsigned long) (-1 * (long) F_SECTOR_SIZE); /*forcing seek to read 1st sector! abspos=0;*/
\r
516 if ( _f_fseek( (long)gl_file.filesize ) )
\r
518 gl_file.mode = F_FILE_CLOSE;
\r
525 psp_memcpy( &( gl_file.dirpos ), &( gl_file.pos ), sizeof( F_POS ) );
\r
526 _f_clustertopos( gl_file.dirpos.cluster, &gl_file.pos );
\r
528 if ( _f_addentry( &fsname, &gl_file.dirpos, &de ) )
\r
530 return 0; /*couldnt be added*/
\r
533 de->attr |= F_ATTR_ARC; /*set as archiv*/
\r
534 if ( _f_writeglsector( (unsigned long)-1 ) )
\r
540 #if F_FILE_CHANGED_EVENT
\r
541 _f_createfullname( gl_file.filename, sizeof( gl_file.filename ), fsname.path, fsname.filename, fsname.fileext );
\r
546 case F_FILE_WR: /*w*/
\r
547 case F_FILE_WRP: /*w+*/
\r
548 _f_clustertopos( gl_file.dirpos.cluster, &gl_file.pos );
\r
549 if ( _f_findfilewc( fsname.filename, fsname.fileext, &gl_file.pos, &de, 0 ) )
\r
551 unsigned long cluster = _f_getdecluster( de ); /*exist*/
\r
553 if ( de->attr & ( F_ATTR_DIR | F_ATTR_READONLY ) )
\r
558 psp_memcpy( &( gl_file.dirpos ), &( gl_file.pos ), sizeof( F_POS ) );
\r
560 _f_setlong( de->filesize, 0 ); /*reset size;*/
\r
561 de->attr |= F_ATTR_ARC; /*set as archiv*/
\r
562 _f_setword( de->clusterlo, 0 ); /*no points anywhere*/
\r
563 _f_setword( de->clusterhi, 0 );
\r
565 if ( gl_volume.mediatype == F_FAT32_MEDIA )
\r
567 f_igettimedate( &time, &date );
\r
568 _f_setword( &de->crtdate, date ); /*if there is realtime clock then creation date could be set from*/
\r
569 _f_setword( &de->crttime, time ); /*if there is realtime clock then creation time could be set from*/
\r
570 _f_setword( &de->lastaccessdate, date ); /*if there is realtime clock then creation date could be set from*/
\r
573 if ( _f_writeglsector( (unsigned long)-1 ) )
\r
578 if ( _f_removechain( cluster ) )
\r
580 return 0; /*remove */
\r
585 if ( _f_addentry( &fsname, &gl_file.dirpos, &de ) )
\r
587 return 0; /*couldnt be added*/
\r
590 psp_memset( &gl_file, 0, 21 );
\r
591 de->attr |= F_ATTR_ARC; /*set as archiv*/
\r
592 if ( _f_writeglsector( (unsigned long)-1 ) )
\r
598 #if F_FILE_CHANGED_EVENT
\r
599 _f_createfullname( gl_file.filename, sizeof( gl_file.filename ), fsname.path, fsname.filename, fsname.fileext );
\r
605 return 0; /*invalid mode*/
\r
608 if ( ( m_mode != F_FILE_RD ) && ( gl_file.startcluster == 0 ) )
\r
610 gl_volume.fatsector = (unsigned long)-1;
\r
611 if ( _f_alloccluster( &( gl_file.startcluster ) ) )
\r
616 _f_clustertopos( gl_file.startcluster, &gl_file.pos );
\r
617 if ( _f_setclustervalue( gl_file.startcluster, F_CLUSTER_LAST ) )
\r
622 if ( _f_writefatsector() )
\r
629 gl_file.mode = m_mode; /* lock it */
\r
630 return (F_FILE *)1;
\r
634 /****************************************************************************
\r
635 * _f_updatefileentry
\r
636 * Updated a file directory entry or removes the entry
\r
637 * and the fat chain belonging to it.
\r
638 ***************************************************************************/
\r
639 static unsigned char _f_updatefileentry ( int remove )
\r
642 unsigned short date;
\r
643 unsigned short time;
\r
645 de = (F_DIRENTRY *)( gl_sector + sizeof( F_DIRENTRY ) * gl_file.dirpos.pos );
\r
646 if ( _f_readglsector( gl_file.dirpos.sector ) || remove )
\r
648 _f_setdecluster( de, 0 );
\r
649 _f_setlong( &de->filesize, 0 );
\r
650 (void)_f_writeglsector( (unsigned long)-1 );
\r
651 (void)_f_removechain( gl_file.startcluster );
\r
652 return F_ERR_WRITE;
\r
655 _f_setdecluster( de, gl_file.startcluster );
\r
656 _f_setlong( &de->filesize, gl_file.filesize );
\r
657 f_igettimedate( &time, &date );
\r
658 _f_setword( &de->cdate, date ); /*if there is realtime clock then creation date could be set from*/
\r
659 _f_setword( &de->ctime, time ); /*if there is realtime clock then creation time could be set from*/
\r
660 if ( gl_volume.mediatype == F_FAT32_MEDIA )
\r
662 _f_setword( &de->lastaccessdate, date ); /*if there is realtime clock then creation date could be set from*/
\r
665 return _f_writeglsector( (unsigned long)-1 );
\r
666 } /* _f_updatefileentry */
\r
669 /****************************************************************************
\r
673 * close a previously opened file
\r
677 * filehandle - which file needs to be closed
\r
681 * error code or zero if successful
\r
683 ***************************************************************************/
\r
684 unsigned char fn_close ( F_FILE * f )
\r
688 #if F_FILE_CHANGED_EVENT
\r
689 unsigned char mode;
\r
694 return F_ERR_NOTOPEN;
\r
697 ret = _f_getvolume();
\r
703 if ( gl_file.mode == F_FILE_CLOSE )
\r
705 return F_ERR_NOTOPEN;
\r
708 else if ( gl_file.mode == F_FILE_RD )
\r
710 gl_file.mode = F_FILE_CLOSE;
\r
715 #if F_FILE_CHANGED_EVENT
\r
718 gl_file.mode = F_FILE_CLOSE;
\r
720 if ( gl_file.modified )
\r
722 if ( _f_writeglsector( (unsigned long)-1 ) )
\r
724 (void)_f_updatefileentry( 1 );
\r
725 return F_ERR_WRITE;
\r
729 ret = _f_updatefileentry( 0 );
\r
731 #if F_FILE_CHANGED_EVENT
\r
732 if ( f_filechangedevent && !ret )
\r
734 ST_FILE_CHANGED fc;
\r
735 if ( ( mode == F_FILE_WR ) || ( mode == F_FILE_WRP ) )
\r
737 fc.action = FACTION_ADDED;
\r
738 fc.flags = FFLAGS_FILE_NAME;
\r
740 else if ( ( mode == F_FILE_A ) || ( mode == F_FILE_RDP ) )
\r
742 fc.action = FACTION_MODIFIED;
\r
743 fc.flags = FFLAGS_FILE_NAME | FFLAGS_SIZE;
\r
746 strcpy( fc.filename, f->filename );
\r
747 if ( f->filename[0] )
\r
749 f_filechangedevent( &fc );
\r
752 f->filename[0] = '\0';
\r
755 #endif /* if F_FILE_CHANGED_EVENT */
\r
761 /****************************************************************************
\r
765 * flush a previously opened file
\r
769 * filehandle - which file needs to be closed
\r
773 * error code or zero if successful
\r
775 ***************************************************************************/
\r
776 unsigned char fn_flush ( F_FILE * f )
\r
782 return F_ERR_NOTOPEN;
\r
785 ret = _f_getvolume();
\r
791 if ( gl_file.mode == F_FILE_CLOSE )
\r
793 return F_ERR_NOTOPEN;
\r
795 else if ( gl_file.mode != F_FILE_RD )
\r
797 if ( gl_file.modified )
\r
799 if ( _f_writeglsector( (unsigned long)-1 ) )
\r
801 (void)_f_updatefileentry( 1 );
\r
802 return F_ERR_WRITE;
\r
806 return _f_updatefileentry( 0 );
\r
813 /****************************************************************************
\r
817 * read data from file
\r
821 * buf - where the store data
\r
822 * size - size of items to be read
\r
823 * _size_t - number of items need to be read
\r
824 * filehandle - file where to read from
\r
828 * with the number of read bytes
\r
830 ***************************************************************************/
\r
831 long fn_read ( void * buf, long size, long _size_st, F_FILE * f )
\r
833 char * buffer = (char *)buf;
\r
841 if ( ( gl_file.mode & ( F_FILE_RD | F_FILE_RDP | F_FILE_WRP | F_FILE_AP ) ) == 0 )
\r
848 _size_st = retsize;
\r
851 if ( _f_getvolume() )
\r
853 return 0; /*cant read any*/
\r
856 if ( size + gl_file.relpos + gl_file.abspos >= gl_file.filesize ) /*read len longer than the file*/
\r
858 size = (long)( ( gl_file.filesize ) - ( gl_file.relpos ) - ( gl_file.abspos ) ); /*calculate new size*/
\r
866 if ( _f_getcurrsector() )
\r
868 gl_file.mode = F_FILE_CLOSE; /*no more read allowed*/
\r
874 unsigned long rdsize = (unsigned long)size;
\r
876 if ( gl_file.relpos == F_SECTOR_SIZE )
\r
880 gl_file.abspos += gl_file.relpos;
\r
881 gl_file.relpos = 0;
\r
883 if ( gl_file.modified )
\r
885 ret = _f_writeglsector( (unsigned long)-1 ); /*empty write buffer */
\r
888 gl_file.mode = F_FILE_CLOSE; /*no more read allowed*/
\r
893 gl_file.pos.sector++; /*goto next*/
\r
895 ret = _f_getcurrsector();
\r
896 if ( ( ret == F_ERR_EOF ) && ( !size ) )
\r
903 gl_file.mode = F_FILE_CLOSE; /*no more read allowed*/
\r
913 if ( rdsize >= F_SECTOR_SIZE - gl_file.relpos )
\r
915 rdsize = (unsigned long)( F_SECTOR_SIZE - gl_file.relpos );
\r
918 psp_memcpy( buffer, gl_sector + gl_file.relpos, rdsize ); /*always less than 512*/
\r
921 gl_file.relpos += rdsize;
\r
926 return retsize / _size_st;
\r
930 /****************************************************************************
\r
934 * write data into file
\r
938 * buf - where the store data
\r
939 * size - size of items to be read
\r
940 * size_t - number of items need to be read
\r
941 * filehandle - file where to read from
\r
945 * with the number of read bytes
\r
947 ***************************************************************************/
\r
949 long fn_write ( const void * buf, long size, long _size_st, F_FILE * f )
\r
951 char * buffer = (char *)buf;
\r
960 if ( ( gl_file.mode & ( F_FILE_WR | F_FILE_A | F_FILE_RDP | F_FILE_WRP | F_FILE_AP ) ) == 0 )
\r
967 _size_st = retsize;
\r
970 if ( _f_getvolume() )
\r
972 return 0; /*can't write*/
\r
975 if ( ( gl_file.mode ) & ( F_FILE_A | F_FILE_AP ) )
\r
977 if ( _f_fseek( (long)gl_file.filesize ) )
\r
979 gl_file.mode = F_FILE_CLOSE;
\r
984 if ( _f_getcurrsector() )
\r
986 gl_file.mode = F_FILE_CLOSE;
\r
992 unsigned long wrsize = (unsigned long)size;
\r
994 if ( gl_file.relpos == F_SECTOR_SIZE )
\r
996 if ( gl_file.modified )
\r
998 if ( _f_emptywritebuffer() )
\r
1000 gl_file.mode = F_FILE_CLOSE;
\r
1001 if ( _f_updatefileentry( 0 ) == 0 )
\r
1013 gl_file.pos.sector++; /*goto next*/
\r
1016 gl_file.abspos += gl_file.relpos;
\r
1017 gl_file.relpos = 0;
\r
1019 if ( wrsize && ( wrsize < F_SECTOR_SIZE ) )
\r
1021 ret = _f_getcurrsector();
\r
1025 if ( ret != F_ERR_EOF )
\r
1027 gl_file.mode = F_FILE_CLOSE; /*no more read allowed*/
\r
1039 if ( wrsize >= F_SECTOR_SIZE - gl_file.relpos )
\r
1041 wrsize = (unsigned long)( F_SECTOR_SIZE - gl_file.relpos );
\r
1045 psp_memcpy( gl_sector + gl_file.relpos, buffer, wrsize );
\r
1046 gl_file.modified = 1; /*sector is modified*/
\r
1049 gl_file.relpos += wrsize;
\r
1051 retsize += wrsize;
\r
1053 if ( gl_file.filesize < gl_file.abspos + gl_file.relpos )
\r
1055 gl_file.filesize = gl_file.abspos + gl_file.relpos;
\r
1059 return retsize / _size_st;
\r
1064 /****************************************************************************
\r
1068 * moves position into given offset in given file
\r
1072 * filehandle - F_FILE structure which file position needed to be modified
\r
1073 * offset - relative position
\r
1074 * whence - where to calculate position (F_SEEK_SET,F_SEEK_CUR,F_SEEK_END)
\r
1078 * 0 - if successfully
\r
1079 * other - if any error
\r
1081 ***************************************************************************/
\r
1084 unsigned char fn_seek ( F_FILE * f, long offset, unsigned char whence )
\r
1086 unsigned char ret;
\r
1090 return F_ERR_NOTOPEN;
\r
1093 if ( ( gl_file.mode & ( F_FILE_RD | F_FILE_WR | F_FILE_A | F_FILE_RDP | F_FILE_WRP | F_FILE_AP ) ) == 0 )
\r
1095 return F_ERR_NOTOPEN;
\r
1098 ret = _f_getvolume();
\r
1104 if ( whence == F_SEEK_CUR )
\r
1106 return _f_fseek( (long)( gl_file.abspos + gl_file.relpos + offset ) );
\r
1108 else if ( whence == F_SEEK_END )
\r
1110 return _f_fseek( (long)( gl_file.filesize + offset ) );
\r
1112 else if ( whence == F_SEEK_SET )
\r
1114 return _f_fseek( offset );
\r
1117 return F_ERR_NOTUSEABLE;
\r
1122 /****************************************************************************
\r
1126 * Tells the current position of opened file
\r
1130 * filehandle - which file needs the position
\r
1134 * position in the file from start
\r
1136 ***************************************************************************/
\r
1138 long fn_tell ( F_FILE * f )
\r
1145 if ( ( gl_file.mode & ( F_FILE_RD | F_FILE_WR | F_FILE_A | F_FILE_RDP | F_FILE_WRP | F_FILE_AP ) ) == 0 )
\r
1150 return (long)( gl_file.abspos + gl_file.relpos );
\r
1155 /****************************************************************************
\r
1159 * Tells if the current position is end of file or not
\r
1163 * filehandle - which file needs the checking
\r
1168 * other - if EOF or invalid file handle
\r
1170 ***************************************************************************/
\r
1172 unsigned char fn_eof ( F_FILE * f )
\r
1176 return F_ERR_NOTOPEN; /*if error*/
\r
1179 if ( gl_file.abspos + gl_file.relpos < gl_file.filesize )
\r
1184 return F_ERR_EOF; /*EOF*/
\r
1190 /****************************************************************************
\r
1194 * set the fileposition in the opened file to the begining
\r
1198 * filehandle - which file needs to be rewinded
\r
1202 * error code or zero if successful
\r
1204 ***************************************************************************/
\r
1206 unsigned char fn_rewind ( F_FILE * filehandle )
\r
1208 return fn_seek( filehandle, 0L, F_SEEK_SET );
\r
1213 /****************************************************************************
\r
1217 * write a character into file
\r
1221 * ch - what to write into file
\r
1222 * filehandle - file where to write
\r
1226 * with the number of written bytes (1-success, 0-not successfully)
\r
1228 ***************************************************************************/
\r
1230 int fn_putc ( int ch, F_FILE * filehandle )
\r
1232 unsigned char tmpch = (unsigned char)ch;
\r
1234 if ( fn_write( &tmpch, 1, 1, filehandle ) )
\r
1246 /****************************************************************************
\r
1250 * get a character from file
\r
1254 * filehandle - file where to read from
\r
1258 * with the read character or -1 if read was not successfully
\r
1260 ***************************************************************************/
\r
1261 int fn_getc ( F_FILE * filehandle )
\r
1265 if ( !fn_read( &ch, 1, 1, filehandle ) )
\r
1275 /****************************************************************************
\r
1283 * filename - file which wanted to be deleted (with or without path)
\r
1287 * error code or zero if successful
\r
1289 ***************************************************************************/
\r
1290 unsigned char fn_delete ( const char * filename )
\r
1295 unsigned char ret;
\r
1297 if ( _f_setfsname( filename, &fsname ) )
\r
1299 return F_ERR_INVALIDNAME; /*invalid name*/
\r
1302 if ( _f_checknamewc( fsname.filename, fsname.fileext ) )
\r
1304 return F_ERR_INVALIDNAME; /*invalid name*/
\r
1307 if ( fsname.filename[0] == '.' )
\r
1309 return F_ERR_NOTFOUND;
\r
1312 ret = _f_getvolume();
\r
1318 if ( !( _f_findpath( &fsname, &pos ) ) )
\r
1320 return F_ERR_INVALIDDIR;
\r
1323 if ( !_f_findfilewc( fsname.filename, fsname.fileext, &pos, &de, 0 ) )
\r
1325 return F_ERR_NOTFOUND;
\r
1328 if ( de->attr & F_ATTR_DIR )
\r
1330 return F_ERR_INVALIDDIR; /*directory*/
\r
1333 if ( de->attr & F_ATTR_READONLY )
\r
1335 return F_ERR_ACCESSDENIED; /*readonly*/
\r
1338 if ( ( gl_file.mode != F_FILE_CLOSE ) && ( gl_file.dirpos.sector == pos.sector ) && ( gl_file.dirpos.pos == pos.pos ) )
\r
1340 return F_ERR_LOCKED;
\r
1343 de->name[0] = (unsigned char)0xe5; /*removes it*/
\r
1344 ret = _f_writeglsector( (unsigned long)-1 );
\r
1350 ret = _f_removechain( _f_getdecluster( de ) );
\r
1352 #if F_FILE_CHANGED_EVENT
\r
1353 if ( f_filechangedevent && !ret )
\r
1355 ST_FILE_CHANGED fc;
\r
1356 fc.action = FACTION_REMOVED;
\r
1357 fc.flags = FFLAGS_FILE_NAME;
\r
1359 if ( !_f_createfullname( fc.filename, sizeof( fc.filename ), fsname.path, fsname.filename, fsname.fileext ) )
\r
1361 f_filechangedevent( &fc );
\r
1373 /****************************************************************************
\r
1379 * INPUT: f - file pointer
\r
1380 * filesize - required new size
\r
1381 * RETURN: F_NO_ERROR - on success
\r
1384 ***************************************************************************/
\r
1385 unsigned char _f_seteof ( F_FILE * f, long filesize )
\r
1387 unsigned char rc = F_NO_ERROR;
\r
1391 return F_ERR_NOTOPEN; /*if error*/
\r
1394 if ( ( unsigned long) filesize < gl_file.filesize )
\r
1396 rc = _f_fseek( filesize );
\r
1397 if ( rc == F_NO_ERROR )
\r
1399 unsigned long cluster;
\r
1400 rc = _f_getclustervalue( gl_file.pos.cluster, &cluster );
\r
1401 if ( rc == F_NO_ERROR )
\r
1403 if ( cluster != F_CLUSTER_LAST )
\r
1405 rc = _f_removechain( cluster );
\r
1411 rc = _f_setclustervalue( gl_file.pos.cluster, F_CLUSTER_LAST );
\r
1417 rc = _f_writefatsector();
\r
1424 gl_file.filesize = (unsigned long)filesize;
\r
1428 else if ( (unsigned long) filesize > gl_file.filesize )
\r
1430 rc = _f_fseek( filesize );
\r
1437 /****************************************************************************
\r
1443 * INPUT: f - file pointer
\r
1444 * filesize - required new size
\r
1445 * RETURN: F_NO_ERROR - on success
\r
1448 ***************************************************************************/
\r
1449 unsigned char fn_seteof ( F_FILE * f )
\r
1451 unsigned char rc = F_NO_ERROR;
\r
1453 rc = _f_seteof( f, ( gl_file.abspos + gl_file.relpos ) );
\r
1461 /****************************************************************************
\r
1465 * Open a file and set end of file
\r
1467 * INPUT: filename - name of the file
\r
1468 * filesize - required new size
\r
1469 * RETURN: NULL on error, otherwise file pointer
\r
1471 ***************************************************************************/
\r
1472 F_FILE * fn_truncate ( const char * filename, long filesize )
\r
1474 F_FILE * f = fn_open( filename, "r+" );
\r
1479 rc = _f_fseek( (long)gl_file.filesize );
\r
1480 if ( rc == F_NO_ERROR )
\r
1482 rc = _f_seteof( f, filesize );
\r
1493 } /* fn_truncate */
\r