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 pure GPL open source license (as opposed to the modified GPL licence
\r
9 * under which FreeRTOS is distributed) or a commercial license. Details of
\r
10 * both license options follow:
\r
12 * - Open source licensing -
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13 * FreeRTOS+FAT SL is a free download and may be used, modified, evaluated and
\r
14 * distributed without charge provided the user adheres to version two of the
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15 * GNU General Public License (GPL) and does not remove the copyright notice or
\r
16 * this text. The GPL V2 text is available on the gnu.org web site, and on the
\r
17 * following URL: http://www.FreeRTOS.org/gpl-2.0.txt.
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19 * - Commercial licensing -
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20 * Businesses and individuals who for commercial or other reasons cannot comply
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21 * with the terms of the GPL V2 license must obtain a commercial license before
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22 * incorporating FreeRTOS+FAT SL into proprietary software for distribution in
\r
23 * any form. Commercial licenses can be purchased from
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24 * http://shop.freertos.org/fat_sl and do not require any source files to be
\r
27 * FreeRTOS+FAT SL is distributed in the hope that it will be useful. You
\r
28 * cannot use FreeRTOS+FAT SL unless you agree that you use the software 'as
\r
29 * is'. FreeRTOS+FAT SL is provided WITHOUT ANY WARRANTY; without even the
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30 * implied warranties of NON-INFRINGEMENT, MERCHANTABILITY or FITNESS FOR A
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31 * PARTICULAR PURPOSE. Real Time Engineers Ltd. and HCC Embedded disclaims all
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32 * conditions and terms, be they implied, expressed, or statutory.
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34 * http://www.FreeRTOS.org
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35 * http://www.FreeRTOS.org/FreeRTOS-Plus
\r
39 #include "../../api/fat_sl.h"
\r
40 #include "../../psp/include/psp_string.h"
\r
49 #include "../../version/ver_fat_sl.h"
\r
50 #if VER_FAT_SL_MAJOR != 3 || VER_FAT_SL_MINOR != 2
\r
51 #error Incompatible FAT_SL version number!
\r
54 static unsigned char _f_emptywritebuffer ( void );
\r
57 /****************************************************************************
\r
65 * filename - file whose length is needed
\r
69 * length of the file
\r
71 ***************************************************************************/
\r
73 long fn_filelength ( const char * filename )
\r
79 if ( _f_setfsname( filename, &fsname ) )
\r
81 return 0; /*invalid name*/
\r
84 if ( _f_checknamewc( fsname.filename, fsname.fileext ) )
\r
86 return 0; /*invalid name*/
\r
89 if ( _f_getvolume() )
\r
91 return 0; /*can't get the size*/
\r
94 if ( !_f_findpath( &fsname, &pos ) )
\r
99 if ( !_f_findfilewc( fsname.filename, fsname.fileext, &pos, &de, 0 ) )
\r
104 if ( de->attr & F_ATTR_DIR )
\r
106 return 0; /*directory*/
\r
109 return (long)_f_getlong( &de->filesize );
\r
110 } /* fn_filelength */
\r
116 /****************************************************************************
\r
118 * _f_emptywritebuffer
\r
120 * empty write buffer if it contains unwritten data
\r
123 * error code or zero if successful
\r
125 ***************************************************************************/
\r
128 static unsigned char _f_emptywritebuffer ( void )
\r
132 ret = _f_writeglsector( gl_file.pos.sector );
\r
138 gl_file.modified = 0;
\r
140 gl_file.pos.sector++;
\r
142 if ( gl_file.pos.sector >= gl_file.pos.sectorend )
\r
144 unsigned long value;
\r
146 gl_volume.fatsector = (unsigned long)-1;
\r
147 ret = _f_getclustervalue( gl_file.pos.cluster, &value );
\r
153 if ( ( value >= 2 ) && ( value < F_CLUSTER_RESERVED ) ) /*we are in chain*/
\r
155 gl_file.prevcluster = gl_file.pos.cluster;
\r
156 _f_clustertopos( value, &gl_file.pos ); /*go to next cluster*/
\r
160 unsigned long nextcluster;
\r
162 ret = _f_alloccluster( &nextcluster );
\r
168 ret = _f_setclustervalue( nextcluster, F_CLUSTER_LAST );
\r
174 ret = _f_setclustervalue( gl_file.pos.cluster, nextcluster );
\r
180 gl_file.prevcluster = gl_file.pos.cluster;
\r
182 _f_clustertopos( nextcluster, &gl_file.pos );
\r
184 return _f_writefatsector();
\r
190 } /* _f_emptywritebuffer */
\r
195 /****************************************************************************
\r
199 * Extend file to a certain size
\r
201 ***************************************************************************/
\r
202 static unsigned char _f_extend ( long size )
\r
204 unsigned long _size;
\r
207 size -= gl_file.filesize;
\r
208 _size = (unsigned long)size;
\r
210 rc = _f_getcurrsector();
\r
216 psp_memset( gl_sector + gl_file.relpos, 0, ( F_SECTOR_SIZE - gl_file.relpos ) );
\r
218 if ( gl_file.relpos + _size > F_SECTOR_SIZE )
\r
220 _size -= ( F_SECTOR_SIZE - gl_file.relpos );
\r
223 if ( _f_emptywritebuffer() )
\r
225 return F_ERR_WRITE;
\r
228 psp_memset( gl_sector, 0, F_SECTOR_SIZE );
\r
229 _size -= ( _size > F_SECTOR_SIZE ? F_SECTOR_SIZE : _size );
\r
234 _size += gl_file.relpos;
\r
237 gl_file.modified = 1;
\r
238 gl_file.filesize += size;
\r
239 gl_file.abspos = gl_file.filesize & ( ~( F_SECTOR_SIZE - 1 ) );
\r
240 gl_file.relpos = _size;
\r
247 /****************************************************************************
\r
251 * subfunction for f_seek it moves position into given offset and read
\r
252 * the current sector
\r
255 * offset - position from start
\r
259 * error code or zero if successful
\r
261 ***************************************************************************/
\r
262 static unsigned char _f_fseek ( long offset )
\r
264 unsigned long cluster;
\r
266 unsigned char ret = F_NO_ERROR;
\r
274 if ( ( (unsigned long) offset <= gl_file.filesize )
\r
275 && ( (unsigned long) offset >= gl_file.abspos )
\r
276 && ( (unsigned long) offset < gl_file.abspos + F_SECTOR_SIZE ) )
\r
278 gl_file.relpos = (unsigned short)( offset - gl_file.abspos );
\r
282 if ( gl_file.modified )
\r
284 ret = _f_writeglsector( (unsigned long)-1 );
\r
287 gl_file.mode = F_FILE_CLOSE; /*cant accessed any more*/
\r
292 if ( gl_file.startcluster )
\r
294 gl_file.abspos = 0;
\r
295 gl_file.relpos = 0;
\r
296 gl_file.prevcluster = 0;
\r
297 gl_file.pos.cluster = gl_file.startcluster;
\r
298 remain = gl_file.filesize;
\r
300 tmp = gl_volume.bootrecord.sector_per_cluster;
\r
301 tmp *= F_SECTOR_SIZE; /* set to cluster size */
\r
304 gl_volume.fatsector = (unsigned long)-1;
\r
305 while ( (unsigned long)offset >= tmp )
\r
307 ret = _f_getclustervalue( gl_file.pos.cluster, &cluster );
\r
310 gl_file.mode = F_FILE_CLOSE;
\r
314 if ( (long) tmp >= remain )
\r
321 gl_file.abspos += tmp;
\r
322 if ( cluster >= F_CLUSTER_RESERVED )
\r
327 gl_file.prevcluster = gl_file.pos.cluster;
\r
328 gl_file.pos.cluster = cluster;
\r
331 _f_clustertopos( gl_file.pos.cluster, &gl_file.pos );
\r
332 if ( remain && offset )
\r
334 while ( ( offset > (long) F_SECTOR_SIZE )
\r
335 && ( remain > (long) F_SECTOR_SIZE ) )
\r
337 gl_file.pos.sector++;
\r
338 offset -= F_SECTOR_SIZE;
\r
339 remain -= F_SECTOR_SIZE;
\r
340 gl_file.abspos += F_SECTOR_SIZE;
\r
344 if ( remain < offset )
\r
346 gl_file.relpos = (unsigned short)remain;
\r
347 ret = _f_extend( gl_file.filesize + offset - remain );
\r
351 gl_file.relpos = (unsigned short)offset;
\r
361 /****************************************************************************
\r
365 * open a file for reading/writing/appending
\r
369 * filename - which file need to be opened
\r
370 * mode - string how to open ("r"-read, "w"-write, "w+"-overwrite, "a"-append
\r
374 * F_FILE pointer if successfully
\r
377 ***************************************************************************/
\r
378 F_FILE * fn_open ( const char * filename, const char * mode )
\r
382 unsigned short date;
\r
383 unsigned short time;
\r
384 unsigned char m_mode = F_FILE_CLOSE;
\r
386 if ( mode[1] == 0 )
\r
388 if ( mode[0] == 'r' )
\r
390 m_mode = F_FILE_RD;
\r
393 if ( mode[0] == 'w' )
\r
395 m_mode = F_FILE_WR;
\r
398 if ( mode[0] == 'a' )
\r
404 if ( ( mode[1] == '+' ) && ( mode[2] == 0 ) )
\r
406 if ( mode[0] == 'r' )
\r
408 m_mode = F_FILE_RDP;
\r
411 if ( mode[0] == 'w' )
\r
413 m_mode = F_FILE_WRP;
\r
416 if ( mode[0] == 'a' )
\r
418 m_mode = F_FILE_AP;
\r
423 if ( m_mode == F_FILE_CLOSE )
\r
425 return 0; /*invalid mode*/
\r
428 if ( _f_setfsname( filename, &fsname ) )
\r
430 return 0; /*invalid name*/
\r
433 if ( _f_checknamewc( fsname.filename, fsname.fileext ) )
\r
435 return 0; /*invalid name*/
\r
438 if ( fsname.filename[0] == '.' )
\r
443 if ( _f_getvolume() )
\r
445 return 0; /*cant open any*/
\r
448 if ( gl_file.mode != F_FILE_CLOSE )
\r
453 psp_memset( &gl_file, 0, 21 );
\r
455 if ( !_f_findpath( &fsname, &gl_file.dirpos ) )
\r
462 case F_FILE_RDP: /*r*/
\r
463 case F_FILE_RD: /*r*/
\r
464 if ( !_f_findfilewc( fsname.filename, fsname.fileext, &gl_file.dirpos, &de, 0 ) )
\r
469 if ( de->attr & F_ATTR_DIR )
\r
471 return 0; /*directory*/
\r
474 gl_file.startcluster = _f_getdecluster( de );
\r
476 if ( gl_file.startcluster )
\r
478 _f_clustertopos( gl_file.startcluster, &gl_file.pos );
\r
479 gl_file.filesize = _f_getlong( &de->filesize );
\r
480 gl_file.abspos = (unsigned long) (-1 * (long) F_SECTOR_SIZE);
\r
481 if ( _f_fseek( 0 ) )
\r
487 #if F_FILE_CHANGED_EVENT
\r
488 if ( m_mode == F_FILE_RDP )
\r
490 _f_createfullname( gl_file.filename, sizeof( gl_file.filename ), fsname.path, fsname.filename, fsname.fileext );
\r
498 case F_FILE_A: /*a*/
\r
499 psp_memcpy( &( gl_file.pos ), &( gl_file.dirpos ), sizeof( F_POS ) );
\r
500 if ( _f_findfilewc( fsname.filename, fsname.fileext, &gl_file.dirpos, &de, 0 ) )
\r
502 if ( de->attr & ( F_ATTR_DIR | F_ATTR_READONLY ) )
\r
507 gl_file.startcluster = _f_getdecluster( de );
\r
508 gl_file.filesize = _f_getlong( &de->filesize );
\r
510 if ( gl_file.startcluster )
\r
512 _f_clustertopos( gl_file.startcluster, &gl_file.pos );
\r
513 gl_file.abspos = (unsigned long) (-1 * (long) F_SECTOR_SIZE); /*forcing seek to read 1st sector! abspos=0;*/
\r
514 if ( _f_fseek( (long)gl_file.filesize ) )
\r
516 gl_file.mode = F_FILE_CLOSE;
\r
523 psp_memcpy( &( gl_file.dirpos ), &( gl_file.pos ), sizeof( F_POS ) );
\r
524 _f_clustertopos( gl_file.dirpos.cluster, &gl_file.pos );
\r
526 if ( _f_addentry( &fsname, &gl_file.dirpos, &de ) )
\r
528 return 0; /*couldnt be added*/
\r
531 de->attr |= F_ATTR_ARC; /*set as archiv*/
\r
532 if ( _f_writeglsector( (unsigned long)-1 ) )
\r
538 #if F_FILE_CHANGED_EVENT
\r
539 _f_createfullname( gl_file.filename, sizeof( gl_file.filename ), fsname.path, fsname.filename, fsname.fileext );
\r
544 case F_FILE_WR: /*w*/
\r
545 case F_FILE_WRP: /*w+*/
\r
546 _f_clustertopos( gl_file.dirpos.cluster, &gl_file.pos );
\r
547 if ( _f_findfilewc( fsname.filename, fsname.fileext, &gl_file.pos, &de, 0 ) )
\r
549 unsigned long cluster = _f_getdecluster( de ); /*exist*/
\r
551 if ( de->attr & ( F_ATTR_DIR | F_ATTR_READONLY ) )
\r
556 psp_memcpy( &( gl_file.dirpos ), &( gl_file.pos ), sizeof( F_POS ) );
\r
558 _f_setlong( de->filesize, 0 ); /*reset size;*/
\r
559 de->attr |= F_ATTR_ARC; /*set as archiv*/
\r
560 _f_setword( de->clusterlo, 0 ); /*no points anywhere*/
\r
561 _f_setword( de->clusterhi, 0 );
\r
563 if ( gl_volume.mediatype == F_FAT32_MEDIA )
\r
565 f_igettimedate( &time, &date );
\r
566 _f_setword( &de->crtdate, date ); /*if there is realtime clock then creation date could be set from*/
\r
567 _f_setword( &de->crttime, time ); /*if there is realtime clock then creation time could be set from*/
\r
568 _f_setword( &de->lastaccessdate, date ); /*if there is realtime clock then creation date could be set from*/
\r
571 if ( _f_writeglsector( (unsigned long)-1 ) )
\r
576 if ( _f_removechain( cluster ) )
\r
578 return 0; /*remove */
\r
583 if ( _f_addentry( &fsname, &gl_file.dirpos, &de ) )
\r
585 return 0; /*couldnt be added*/
\r
588 psp_memset( &gl_file, 0, 21 );
\r
589 de->attr |= F_ATTR_ARC; /*set as archiv*/
\r
590 if ( _f_writeglsector( (unsigned long)-1 ) )
\r
596 #if F_FILE_CHANGED_EVENT
\r
597 _f_createfullname( gl_file.filename, sizeof( gl_file.filename ), fsname.path, fsname.filename, fsname.fileext );
\r
603 return 0; /*invalid mode*/
\r
606 if ( ( m_mode != F_FILE_RD ) && ( gl_file.startcluster == 0 ) )
\r
608 gl_volume.fatsector = (unsigned long)-1;
\r
609 if ( _f_alloccluster( &( gl_file.startcluster ) ) )
\r
614 _f_clustertopos( gl_file.startcluster, &gl_file.pos );
\r
615 if ( _f_setclustervalue( gl_file.startcluster, F_CLUSTER_LAST ) )
\r
620 if ( _f_writefatsector() )
\r
627 gl_file.mode = m_mode; /* lock it */
\r
628 return (F_FILE *)1;
\r
632 /****************************************************************************
\r
633 * _f_updatefileentry
\r
634 * Updated a file directory entry or removes the entry
\r
635 * and the fat chain belonging to it.
\r
636 ***************************************************************************/
\r
637 static unsigned char _f_updatefileentry ( int remove )
\r
640 unsigned short date;
\r
641 unsigned short time;
\r
643 de = (F_DIRENTRY *)( gl_sector + sizeof( F_DIRENTRY ) * gl_file.dirpos.pos );
\r
644 if ( _f_readglsector( gl_file.dirpos.sector ) || remove )
\r
646 _f_setdecluster( de, 0 );
\r
647 _f_setlong( &de->filesize, 0 );
\r
648 (void)_f_writeglsector( (unsigned long)-1 );
\r
649 (void)_f_removechain( gl_file.startcluster );
\r
650 return F_ERR_WRITE;
\r
653 _f_setdecluster( de, gl_file.startcluster );
\r
654 _f_setlong( &de->filesize, gl_file.filesize );
\r
655 f_igettimedate( &time, &date );
\r
656 _f_setword( &de->cdate, date ); /*if there is realtime clock then creation date could be set from*/
\r
657 _f_setword( &de->ctime, time ); /*if there is realtime clock then creation time could be set from*/
\r
658 if ( gl_volume.mediatype == F_FAT32_MEDIA )
\r
660 _f_setword( &de->lastaccessdate, date ); /*if there is realtime clock then creation date could be set from*/
\r
663 return _f_writeglsector( (unsigned long)-1 );
\r
664 } /* _f_updatefileentry */
\r
667 /****************************************************************************
\r
671 * close a previously opened file
\r
675 * filehandle - which file needs to be closed
\r
679 * error code or zero if successful
\r
681 ***************************************************************************/
\r
682 unsigned char fn_close ( F_FILE * f )
\r
686 #if F_FILE_CHANGED_EVENT
\r
687 unsigned char mode;
\r
692 return F_ERR_NOTOPEN;
\r
695 ret = _f_getvolume();
\r
701 if ( gl_file.mode == F_FILE_CLOSE )
\r
703 return F_ERR_NOTOPEN;
\r
706 else if ( gl_file.mode == F_FILE_RD )
\r
708 gl_file.mode = F_FILE_CLOSE;
\r
713 #if F_FILE_CHANGED_EVENT
\r
716 gl_file.mode = F_FILE_CLOSE;
\r
718 if ( gl_file.modified )
\r
720 if ( _f_writeglsector( (unsigned long)-1 ) )
\r
722 (void)_f_updatefileentry( 1 );
\r
723 return F_ERR_WRITE;
\r
727 ret = _f_updatefileentry( 0 );
\r
729 #if F_FILE_CHANGED_EVENT
\r
730 if ( f_filechangedevent && !ret )
\r
732 ST_FILE_CHANGED fc;
\r
733 if ( ( mode == F_FILE_WR ) || ( mode == F_FILE_WRP ) )
\r
735 fc.action = FACTION_ADDED;
\r
736 fc.flags = FFLAGS_FILE_NAME;
\r
738 else if ( ( mode == F_FILE_A ) || ( mode == F_FILE_RDP ) )
\r
740 fc.action = FACTION_MODIFIED;
\r
741 fc.flags = FFLAGS_FILE_NAME | FFLAGS_SIZE;
\r
744 strcpy( fc.filename, f->filename );
\r
745 if ( f->filename[0] )
\r
747 f_filechangedevent( &fc );
\r
750 f->filename[0] = '\0';
\r
753 #endif /* if F_FILE_CHANGED_EVENT */
\r
759 /****************************************************************************
\r
763 * flush a previously opened file
\r
767 * filehandle - which file needs to be closed
\r
771 * error code or zero if successful
\r
773 ***************************************************************************/
\r
774 unsigned char fn_flush ( F_FILE * f )
\r
780 return F_ERR_NOTOPEN;
\r
783 ret = _f_getvolume();
\r
789 if ( gl_file.mode == F_FILE_CLOSE )
\r
791 return F_ERR_NOTOPEN;
\r
793 else if ( gl_file.mode != F_FILE_RD )
\r
795 if ( gl_file.modified )
\r
797 if ( _f_writeglsector( (unsigned long)-1 ) )
\r
799 (void)_f_updatefileentry( 1 );
\r
800 return F_ERR_WRITE;
\r
804 return _f_updatefileentry( 0 );
\r
811 /****************************************************************************
\r
815 * read data from file
\r
819 * buf - where the store data
\r
820 * size - size of items to be read
\r
821 * _size_t - number of items need to be read
\r
822 * filehandle - file where to read from
\r
826 * with the number of read bytes
\r
828 ***************************************************************************/
\r
829 long fn_read ( void * buf, long size, long _size_st, F_FILE * f )
\r
831 char * buffer = (char *)buf;
\r
839 if ( ( gl_file.mode & ( F_FILE_RD | F_FILE_RDP | F_FILE_WRP | F_FILE_AP ) ) == 0 )
\r
846 _size_st = retsize;
\r
849 if ( _f_getvolume() )
\r
851 return 0; /*cant read any*/
\r
854 if ( size + gl_file.relpos + gl_file.abspos >= gl_file.filesize ) /*read len longer than the file*/
\r
856 size = (long)( ( gl_file.filesize ) - ( gl_file.relpos ) - ( gl_file.abspos ) ); /*calculate new size*/
\r
864 if ( _f_getcurrsector() )
\r
866 gl_file.mode = F_FILE_CLOSE; /*no more read allowed*/
\r
872 unsigned long rdsize = (unsigned long)size;
\r
874 if ( gl_file.relpos == F_SECTOR_SIZE )
\r
878 gl_file.abspos += gl_file.relpos;
\r
879 gl_file.relpos = 0;
\r
881 if ( gl_file.modified )
\r
883 ret = _f_writeglsector( (unsigned long)-1 ); /*empty write buffer */
\r
886 gl_file.mode = F_FILE_CLOSE; /*no more read allowed*/
\r
891 gl_file.pos.sector++; /*goto next*/
\r
893 ret = _f_getcurrsector();
\r
894 if ( ( ret == F_ERR_EOF ) && ( !size ) )
\r
901 gl_file.mode = F_FILE_CLOSE; /*no more read allowed*/
\r
911 if ( rdsize >= F_SECTOR_SIZE - gl_file.relpos )
\r
913 rdsize = (unsigned long)( F_SECTOR_SIZE - gl_file.relpos );
\r
916 psp_memcpy( buffer, gl_sector + gl_file.relpos, rdsize ); /*always less than 512*/
\r
919 gl_file.relpos += rdsize;
\r
924 return retsize / _size_st;
\r
928 /****************************************************************************
\r
932 * write data into file
\r
936 * buf - where the store data
\r
937 * size - size of items to be read
\r
938 * size_t - number of items need to be read
\r
939 * filehandle - file where to read from
\r
943 * with the number of read bytes
\r
945 ***************************************************************************/
\r
947 long fn_write ( const void * buf, long size, long _size_st, F_FILE * f )
\r
949 char * buffer = (char *)buf;
\r
958 if ( ( gl_file.mode & ( F_FILE_WR | F_FILE_A | F_FILE_RDP | F_FILE_WRP | F_FILE_AP ) ) == 0 )
\r
965 _size_st = retsize;
\r
968 if ( _f_getvolume() )
\r
970 return 0; /*can't write*/
\r
973 if ( ( gl_file.mode ) & ( F_FILE_A | F_FILE_AP ) )
\r
975 if ( _f_fseek( (long)gl_file.filesize ) )
\r
977 gl_file.mode = F_FILE_CLOSE;
\r
982 if ( _f_getcurrsector() )
\r
984 gl_file.mode = F_FILE_CLOSE;
\r
990 unsigned long wrsize = (unsigned long)size;
\r
992 if ( gl_file.relpos == F_SECTOR_SIZE )
\r
994 if ( gl_file.modified )
\r
996 if ( _f_emptywritebuffer() )
\r
998 gl_file.mode = F_FILE_CLOSE;
\r
999 if ( _f_updatefileentry( 0 ) == 0 )
\r
1011 gl_file.pos.sector++; /*goto next*/
\r
1014 gl_file.abspos += gl_file.relpos;
\r
1015 gl_file.relpos = 0;
\r
1017 if ( wrsize && ( wrsize < F_SECTOR_SIZE ) )
\r
1019 ret = _f_getcurrsector();
\r
1023 if ( ret != F_ERR_EOF )
\r
1025 gl_file.mode = F_FILE_CLOSE; /*no more read allowed*/
\r
1037 if ( wrsize >= F_SECTOR_SIZE - gl_file.relpos )
\r
1039 wrsize = (unsigned long)( F_SECTOR_SIZE - gl_file.relpos );
\r
1043 psp_memcpy( gl_sector + gl_file.relpos, buffer, wrsize );
\r
1044 gl_file.modified = 1; /*sector is modified*/
\r
1047 gl_file.relpos += wrsize;
\r
1049 retsize += wrsize;
\r
1051 if ( gl_file.filesize < gl_file.abspos + gl_file.relpos )
\r
1053 gl_file.filesize = gl_file.abspos + gl_file.relpos;
\r
1057 return retsize / _size_st;
\r
1062 /****************************************************************************
\r
1066 * moves position into given offset in given file
\r
1070 * filehandle - F_FILE structure which file position needed to be modified
\r
1071 * offset - relative position
\r
1072 * whence - where to calculate position (F_SEEK_SET,F_SEEK_CUR,F_SEEK_END)
\r
1076 * 0 - if successfully
\r
1077 * other - if any error
\r
1079 ***************************************************************************/
\r
1082 unsigned char fn_seek ( F_FILE * f, long offset, unsigned char whence )
\r
1084 unsigned char ret;
\r
1088 return F_ERR_NOTOPEN;
\r
1091 if ( ( gl_file.mode & ( F_FILE_RD | F_FILE_WR | F_FILE_A | F_FILE_RDP | F_FILE_WRP | F_FILE_AP ) ) == 0 )
\r
1093 return F_ERR_NOTOPEN;
\r
1096 ret = _f_getvolume();
\r
1102 if ( whence == F_SEEK_CUR )
\r
1104 return _f_fseek( (long)( gl_file.abspos + gl_file.relpos + offset ) );
\r
1106 else if ( whence == F_SEEK_END )
\r
1108 return _f_fseek( (long)( gl_file.filesize + offset ) );
\r
1110 else if ( whence == F_SEEK_SET )
\r
1112 return _f_fseek( offset );
\r
1115 return F_ERR_NOTUSEABLE;
\r
1120 /****************************************************************************
\r
1124 * Tells the current position of opened file
\r
1128 * filehandle - which file needs the position
\r
1132 * position in the file from start
\r
1134 ***************************************************************************/
\r
1136 long fn_tell ( F_FILE * f )
\r
1143 if ( ( gl_file.mode & ( F_FILE_RD | F_FILE_WR | F_FILE_A | F_FILE_RDP | F_FILE_WRP | F_FILE_AP ) ) == 0 )
\r
1148 return (long)( gl_file.abspos + gl_file.relpos );
\r
1153 /****************************************************************************
\r
1157 * Tells if the current position is end of file or not
\r
1161 * filehandle - which file needs the checking
\r
1166 * other - if EOF or invalid file handle
\r
1168 ***************************************************************************/
\r
1170 unsigned char fn_eof ( F_FILE * f )
\r
1174 return F_ERR_NOTOPEN; /*if error*/
\r
1177 if ( gl_file.abspos + gl_file.relpos < gl_file.filesize )
\r
1182 return F_ERR_EOF; /*EOF*/
\r
1188 /****************************************************************************
\r
1192 * set the fileposition in the opened file to the begining
\r
1196 * filehandle - which file needs to be rewinded
\r
1200 * error code or zero if successful
\r
1202 ***************************************************************************/
\r
1204 unsigned char fn_rewind ( F_FILE * filehandle )
\r
1206 return fn_seek( filehandle, 0L, F_SEEK_SET );
\r
1211 /****************************************************************************
\r
1215 * write a character into file
\r
1219 * ch - what to write into file
\r
1220 * filehandle - file where to write
\r
1224 * with the number of written bytes (1-success, 0-not successfully)
\r
1226 ***************************************************************************/
\r
1228 int fn_putc ( int ch, F_FILE * filehandle )
\r
1230 unsigned char tmpch = (unsigned char)ch;
\r
1232 if ( fn_write( &tmpch, 1, 1, filehandle ) )
\r
1244 /****************************************************************************
\r
1248 * get a character from file
\r
1252 * filehandle - file where to read from
\r
1256 * with the read character or -1 if read was not successfully
\r
1258 ***************************************************************************/
\r
1259 int fn_getc ( F_FILE * filehandle )
\r
1263 if ( !fn_read( &ch, 1, 1, filehandle ) )
\r
1273 /****************************************************************************
\r
1281 * filename - file which wanted to be deleted (with or without path)
\r
1285 * error code or zero if successful
\r
1287 ***************************************************************************/
\r
1288 unsigned char fn_delete ( const char * filename )
\r
1293 unsigned char ret;
\r
1295 if ( _f_setfsname( filename, &fsname ) )
\r
1297 return F_ERR_INVALIDNAME; /*invalid name*/
\r
1300 if ( _f_checknamewc( fsname.filename, fsname.fileext ) )
\r
1302 return F_ERR_INVALIDNAME; /*invalid name*/
\r
1305 if ( fsname.filename[0] == '.' )
\r
1307 return F_ERR_NOTFOUND;
\r
1310 ret = _f_getvolume();
\r
1316 if ( !( _f_findpath( &fsname, &pos ) ) )
\r
1318 return F_ERR_INVALIDDIR;
\r
1321 if ( !_f_findfilewc( fsname.filename, fsname.fileext, &pos, &de, 0 ) )
\r
1323 return F_ERR_NOTFOUND;
\r
1326 if ( de->attr & F_ATTR_DIR )
\r
1328 return F_ERR_INVALIDDIR; /*directory*/
\r
1331 if ( de->attr & F_ATTR_READONLY )
\r
1333 return F_ERR_ACCESSDENIED; /*readonly*/
\r
1336 if ( ( gl_file.mode != F_FILE_CLOSE ) && ( gl_file.dirpos.sector == pos.sector ) && ( gl_file.dirpos.pos == pos.pos ) )
\r
1338 return F_ERR_LOCKED;
\r
1341 de->name[0] = (unsigned char)0xe5; /*removes it*/
\r
1342 ret = _f_writeglsector( (unsigned long)-1 );
\r
1348 ret = _f_removechain( _f_getdecluster( de ) );
\r
1350 #if F_FILE_CHANGED_EVENT
\r
1351 if ( f_filechangedevent && !ret )
\r
1353 ST_FILE_CHANGED fc;
\r
1354 fc.action = FACTION_REMOVED;
\r
1355 fc.flags = FFLAGS_FILE_NAME;
\r
1357 if ( !_f_createfullname( fc.filename, sizeof( fc.filename ), fsname.path, fsname.filename, fsname.fileext ) )
\r
1359 f_filechangedevent( &fc );
\r
1371 /****************************************************************************
\r
1377 * INPUT: f - file pointer
\r
1378 * filesize - required new size
\r
1379 * RETURN: F_NO_ERROR - on success
\r
1382 ***************************************************************************/
\r
1383 unsigned char _f_seteof ( F_FILE * f, long filesize )
\r
1385 unsigned char rc = F_NO_ERROR;
\r
1389 return F_ERR_NOTOPEN; /*if error*/
\r
1392 if ( ( unsigned long) filesize < gl_file.filesize )
\r
1394 rc = _f_fseek( filesize );
\r
1395 if ( rc == F_NO_ERROR )
\r
1397 unsigned long cluster;
\r
1398 rc = _f_getclustervalue( gl_file.pos.cluster, &cluster );
\r
1399 if ( rc == F_NO_ERROR )
\r
1401 if ( cluster != F_CLUSTER_LAST )
\r
1403 rc = _f_removechain( cluster );
\r
1409 rc = _f_setclustervalue( gl_file.pos.cluster, F_CLUSTER_LAST );
\r
1415 rc = _f_writefatsector();
\r
1422 gl_file.filesize = (unsigned long)filesize;
\r
1426 else if ( (unsigned long) filesize > gl_file.filesize )
\r
1428 rc = _f_fseek( filesize );
\r
1435 /****************************************************************************
\r
1441 * INPUT: f - file pointer
\r
1442 * filesize - required new size
\r
1443 * RETURN: F_NO_ERROR - on success
\r
1446 ***************************************************************************/
\r
1447 unsigned char fn_seteof ( F_FILE * f )
\r
1449 unsigned char rc = F_NO_ERROR;
\r
1451 rc = _f_seteof( f, ( gl_file.abspos + gl_file.relpos ) );
\r
1459 /****************************************************************************
\r
1463 * Open a file and set end of file
\r
1465 * INPUT: filename - name of the file
\r
1466 * filesize - required new size
\r
1467 * RETURN: NULL on error, otherwise file pointer
\r
1469 ***************************************************************************/
\r
1470 F_FILE * fn_truncate ( const char * filename, long filesize )
\r
1472 F_FILE * f = fn_open( filename, "r+" );
\r
1477 rc = _f_fseek( (long)gl_file.filesize );
\r
1478 if ( rc == F_NO_ERROR )
\r
1480 rc = _f_seteof( f, filesize );
\r
1491 } /* fn_truncate */
\r