📄 fat32.lst
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735 4 lfn_name[i++] = lfn_name[9];
736 4 lfn_name[i++] = lfn_name[10];
737 4 lfn_name[i++] = lfn_name[11];
738 4 lfn_name[i++] = lfn_name[12];
739 4 }
740 3 lfn_name[i] = '\0'; /* end of name */
741 3 }
742 2 else
743 2 {
744 3 /* true DOS 8.3 entry format */
745 3 for (i = 0; i < 8; i++)
746 3 {
747 4 lfn_name[i] = gl_buffer[i];
748 4
749 4 if (lfn_name[i] == ' ')
750 4 { /* space is end of name */
751 5 break;
752 5 }
753 4 }
754 3 if ((gl_buffer[8] == ' ') &&
755 3 (gl_buffer[9] == ' ') &&
756 3 (gl_buffer[10] == ' '))
757 3 lfn_name[i++] = ' ';
758 3 else
759 3 lfn_name[i++] = '.'; /* append extension */
760 3 lfn_name[i++] = gl_buffer[8];
761 3 lfn_name[i++] = gl_buffer[9];
762 3 lfn_name[i++] = gl_buffer[10];
763 3
764 3 for (; i != 14; i++)
765 3 {
766 4 lfn_name[i] = ' '; /* append spaces for display reason */
767 4 }
768 3 lfn_name[i] = '\0'; /* end of string */
769 3 }
770 2 fat_cache.current.attributes = gl_buffer[11]; /* filter on the file type */
771 2
772 2 ext[0]= gl_buffer[8]; /* store extension */
773 2 ext[1]= gl_buffer[9];
774 2 ext[2]= gl_buffer[10];
775 2
776 2 fat_current_end_entry_position++;
777 2 if ((fat_check_ext() & current_ext) == FILE_XXX)
778 2 {
779 3 fat_dir_current_offs += ((fat_current_end_entry_position - fat_current_start_entry_position) << 5);
-
780 3 }
781 2 }
782 1 while ((fat_check_ext() & current_ext) == FILE_XXX);
783 1
784 1
785 1 entry->start_cluster = gl_buffer[26]; /* starting cluster value */
786 1 entry->start_cluster += ((Uint32) gl_buffer[27]) << 8;
787 1 entry->start_cluster += ((Uint32) gl_buffer[20]) << 16;
788 1 entry->start_cluster += ((Uint32) gl_buffer[21]) << 24;
789 1 entry->size.b[3] = gl_buffer[28]; /* file size value */
790 1 entry->size.b[2] = gl_buffer[29];
791 1 entry->size.b[1] = gl_buffer[30];
C51 COMPILER V6.20c FAT32 10/19/2004 12:22:16 PAGE 14
792 1 entry->size.b[0] = gl_buffer[31];
793 1 Hard_read_close(); /* close physical read */
794 1
795 1 }
796
797
798 /*F**************************************************************************
799 * NAME: fat_get_root_directory
800 *----------------------------------------------------------------------------
801 * PARAMS:
802 * id: file extension to select
803 *
804 * return:
805 * - OK: file available
806 * - KO: no requested file found
807 * - KO: low_level memory error
808 *----------------------------------------------------------------------------
809 * PURPOSE:
810 * Select first available file/dir in root diretory
811 *----------------------------------------------------------------------------
812 * EXAMPLE:
813 *----------------------------------------------------------------------------
814 * NOTE:
815 * Fill all the cache information for the first time
816 *----------------------------------------------------------------------------
817 * REQUIREMENTS:
818 *****************************************************************************/
819 bit fat_get_root_directory (Byte id)
820 {
821 1 dir_is_root = TRUE; /* set directory root flag */
822 1 fat_cache.current.start_cluster = fat_rootclus_fat32 ; /* #cluster root directory */
823 1 fat_get_clusters(&dclusters, MAX_DIR_FRAGMENT_NUMBER); /* Construct root directory cluster chain */
824 1 fat_last_dclust_index = fat_last_clust_index; /* save last index position for chain cluster
-*/
825 1
826 1
827 1 /* computes sector address from allocation table */
828 1 fat_dir_current_sect = (((Uint32)(dclusters[0].cluster)) * fat_cluster_size)
829 1 + fat_ptr_data;
830 1
831 1 fat_get_dir_file_list(id); /* create list of entries */
832 1 if (fat_dir_list_last == 0)
833 1 return KO; /* no requested (id) entry */
834 1
835 1 fat_dir_list_index = 1; /* point on first root entry */
836 1 fat_current_start_entry_position = 0;
837 1 fat_current_end_entry_position = 0;
838 1 fat_fetch_file_info(&fat_cache.current, FETCH_NEXT);
839 1 fat_cache.parent.start_cluster = fat_rootclus_fat32; /* parent dir is also root */
840 1 fat_cache.parent.attributes = ATTR_DIRECTORY; /* mark as directory */
841 1 return OK;
842 1 }
843
844
845 /*F**************************************************************************
846 * NAME: fat_goto_next
847 *----------------------------------------------------------------------------
848 * PARAMS:
849 *
850 * return:
851 * - OK: next file available
852 * - KO: last file reached
C51 COMPILER V6.20c FAT32 10/19/2004 12:22:16 PAGE 15
853 * - KO: low_level memory error
854 *----------------------------------------------------------------------------
855 * PURPOSE:
856 * Fetch the next dir/file info in cache
857 *----------------------------------------------------------------------------
858 * EXAMPLE:
859 *----------------------------------------------------------------------------
860 * NOTE:
861 *----------------------------------------------------------------------------
862 * REQUIREMENTS:
863 *****************************************************************************/
864 bit fat_goto_next (void)
865 {
866 1 if (fat_dir_list_index < fat_dir_list_last)
867 1 {
868 2 fat_dir_list_index++;
869 2 fat_fetch_file_info(&fat_cache.current, FETCH_NEXT);
870 2 return OK;
871 2 }
872 1 else
873 1 return KO; /* already on last file */
874 1 }
875
876
877 /*F**************************************************************************
878 * NAME: fat_goto_prev
879 *----------------------------------------------------------------------------
880 * PARAMS:
881 *
882 * return:
883 * - OK: previous file available
884 * - KO: first file reached
885 * - KO: low_level memory error
886 *----------------------------------------------------------------------------
887 * PURPOSE:
888 * Fetch the previous directory info in cache
889 *----------------------------------------------------------------------------
890 * EXAMPLE:
891 *----------------------------------------------------------------------------
892 * NOTE:
893 *----------------------------------------------------------------------------
894 * REQUIREMENTS:
895 *****************************************************************************/
896 bit fat_goto_prev (void)
897 {
898 1 Byte min;
899 1
900 1 if (dir_is_root)
901 1 min = 1;
902 1 else
903 1 min = 3;
904 1
905 1 if (fat_dir_list_index != min) /* first file of the directory? */
906 1 {
907 2 fat_dir_list_index--;
908 2 fat_fetch_file_info(&fat_cache.current, FETCH_PREV);
909 2 return OK;
910 2 }
911 1 else
912 1 return KO; /* already on first file */
913 1 }
914
C51 COMPILER V6.20c FAT32 10/19/2004 12:22:16 PAGE 16
915 /*F**************************************************************************
916 * NAME: fat_seek_last
917 *----------------------------------------------------------------------------
918 * PARAMS:
919 *
920 * return:
921 * OK: last file available
922 * KO: low level error
923 *----------------------------------------------------------------------------
924 * PURPOSE:
925 * Fetch the last directory info in cache
926 *----------------------------------------------------------------------------
927 * EXAMPLE:
928 *----------------------------------------------------------------------------
929 * NOTE:
930 *----------------------------------------------------------------------------
931 * REQUIREMENTS:
932 *****************************************************************************/
933 bit fat_seek_last (void)
934 {
935 1 bit result;
936 1 do
937 1 {
938 2 result = fat_goto_next();
939 2 }
940 1 while (result == OK);
941 1 return result;
942 1 }
943
944 /*F**************************************************************************
945 * NAME: fat_seek_entry_record
946 *----------------------------------------------------------------------------
947 * PARAMS:
948 * fat_dir_list_index : # of the fetched entry
949 *
950 * return:
951 * OK: file available
952 * KO: low level error
953 *----------------------------------------------------------------------------
954 * PURPOSE:
955 * Fetch the selected entry
956 *----------------------------------------------------------------------------
957 * EXAMPLE:
958 *----------------------------------------------------------------------------
959 * NOTE:
960 *----------------------------------------------------------------------------
961 * REQUIREMENTS:
962 *****************************************************************************/
963 bit fat_seek_entry_record (void)
964 {
965 1 bit result;
966 1 Uint16 temp;
967 1
968 1 temp = fat_dir_list_index - 1;
969 1 fat_seek_first();
970 1 for (; temp != 0; temp--)
971 1 result = fat_goto_next();
972 1 return result;
973 1 }
974
975 /*F**************************************************************************
976 * NAME: fat_seek_first
C51 COMPILER V6.20c FAT32 10/19/2004 12:22:16 PAGE 17
977 *----------------------------------------------------------------------------
978 * PARAMS:
979 *
980 * return:
981 * - OK: first file found
982 * - KO: low level error
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