Minor changes to English comments - grammatical, etc.

git-svn-id: svn://kolibrios.org@2257 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
killerkirill 2011-10-03 17:52:42 +00:00
parent 582bf6a0ea
commit 02004e9c11

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@ -21,10 +21,10 @@ DISK_NO_INSERT_NOTIFICATION = 1
; Media flags. Represent bits in DISKMEDIAINFO.Flags. ; Media flags. Represent bits in DISKMEDIAINFO.Flags.
DISK_MEDIA_READONLY = 1 DISK_MEDIA_READONLY = 1
; If we see too many partitions, probably there is some error on the disk. ; If too many partitions are detected,there is probably an error on the disk.
; 256 partitions should be enough for any reasonable use. ; 256 partitions should be enough for any reasonable use.
; Also, the same number is limiting the number of MBRs to process; if we see ; Also, the same number is limiting the number of MBRs to process; if
; too many MBRs, probably there is a loop in the MBR structure. ; too many MBRs are visible,there probably is a loop in the MBR structure.
MAX_NUM_PARTITIONS = 256 MAX_NUM_PARTITIONS = 256
; ============================================================================= ; =============================================================================
@ -85,9 +85,9 @@ struct DISKFUNC
; Return value: 0 = disable cache, otherwise = used cache size in bytes. ; Return value: 0 = disable cache, otherwise = used cache size in bytes.
ends ends
; This structure holds an information about a media. ; This structure holds information on a medium.
; Objects with this structure are allocated by the kernel as a part of DISK ; Objects with this structure are allocated by the kernel as a part of the DISK
; structure and filled by a driver in the 'querymedia' callback. ; structure and are filled by a driver in the 'querymedia' callback.
struct DISKMEDIAINFO struct DISKMEDIAINFO
.Flags dd ? .Flags dd ?
; Combination of DISK_MEDIA_* bits. ; Combination of DISK_MEDIA_* bits.
@ -97,8 +97,8 @@ struct DISKMEDIAINFO
; Size of the media in sectors. ; Size of the media in sectors.
ends ends
; This structure represents disk cache. To follow the old implementation, ; This structure represents the disk cache. To follow the old implementation,
; there are two distinct caches for a disk, one for "system" data, other ; there are two distinct caches for a disk, one for "system" data,and the other
; for "application" data. ; for "application" data.
struct DISKCACHE struct DISKCACHE
.Lock MUTEX .Lock MUTEX
@ -160,9 +160,9 @@ struct DISK
; Another reference is taken during any filesystem operation for this media. ; Another reference is taken during any filesystem operation for this media.
; The callback 'closemedia' is called when the reference count decrements to ; The callback 'closemedia' is called when the reference count decrements to
; zero: this usually occurs in 'disk_media_changed', but can be delayed to the ; zero: this usually occurs in 'disk_media_changed', but can be delayed to the
; end of last filesystem operation, if one is active. ; end of the last filesystem operation, if one is active.
.MediaInfo DISKMEDIAINFO .MediaInfo DISKMEDIAINFO
; This field keeps an information about the current media. ; This field keeps information on the current media.
.NumPartitions dd ? .NumPartitions dd ?
; Number of partitions on this media. ; Number of partitions on this media.
.Partitions dd ? .Partitions dd ?
@ -227,9 +227,9 @@ endg
uglobal uglobal
; This mutex guards all operations with the global list of DISK structures. ; This mutex guards all operations with the global list of DISK structures.
disk_list_mutex MUTEX disk_list_mutex MUTEX
; * There are two dependent objects, a disk and a media. In the simplest case ; * There are two dependent objects, a disk and a media. In the simplest case,
; disk and media are both non-removable. However, in the general case both ; disk and media are both non-removable. However, in the general case both
; can be removed at any time, simultaneously or only media, this makes things ; can be removed at any time, simultaneously or only media,and this makes things
; complicated. ; complicated.
; * For efficiency, both disk and media objects are located in the one ; * For efficiency, both disk and media objects are located in the one
; structure named DISK. However, logically they are different. ; structure named DISK. However, logically they are different.
@ -341,7 +341,7 @@ disk_add:
; 1b. Check the result. If allocation failed, return (go to 9) with eax = 0. ; 1b. Check the result. If allocation failed, return (go to 9) with eax = 0.
test eax, eax test eax, eax
jz .nothing jz .nothing
; 2. Copy disk name to the DISK structure. ; 2. Copy the disk name to the DISK structure.
; 2a. Get length of the name, including the terminating zero. ; 2a. Get length of the name, including the terminating zero.
mov ebx, [esp+8+8] ; ebx = pointer to name mov ebx, [esp+8+8] ; ebx = pointer to name
push eax ; save allocated pointer to DISK push eax ; save allocated pointer to DISK
@ -627,7 +627,7 @@ disk_default_adjust_cache_size:
mov eax, [esp+4] mov eax, [esp+4]
ret 4 ret 4
; This is an internal function called from 'disk_media_changed' when new media ; This is an internal function called from 'disk_media_changed' when a new media
; is detected. It creates the list of partitions for the media. ; is detected. It creates the list of partitions for the media.
; If media is not partitioned, then the list consists of one partition which ; If media is not partitioned, then the list consists of one partition which
; covers all the media. ; covers all the media.
@ -688,17 +688,17 @@ lock dec [partition_buffer_users] ; no, we must allocate
; execute step 9 and possibly step 10. ; execute step 9 and possibly step 10.
test ebp, ebp test ebp, ebp
jnz .mbr jnz .mbr
; Partition table can be present or not present. In the first case, we just ; The partition table can be present or not present. In the first case, we just
; read the MBR. In the second case, we just read the bootsector for some ; read the MBR. In the second case, we just read the bootsector for a
; filesystem. ; filesystem.
; We use the following algorithm to distinguish between these cases. ; The following algorithm is used to distinguish between these cases.
; A. If at least one entry of the partition table is invalid, this is ; A. If at least one entry of the partition table is invalid, this is
; a bootsector. See the description of 'is_partition_table_entry' for ; a bootsector. See the description of 'is_partition_table_entry' for
; definition of validity. ; definition of validity.
; B. If all entries are empty (filesystem type field is zero) and the first ; B. If all entries are empty (filesystem type field is zero) and the first
; byte is jmp opcode (0EBh or 0E9h), this is a bootsector which happens to ; byte is jmp opcode (0EBh or 0E9h), this is a bootsector which happens to
; have zeros in the place of partition table. ; have zeros in the place of partition table.
; C. Otherwise, this is a MBR. ; C. Otherwise, this is an MBR.
; 9. Test for MBR vs bootsector. ; 9. Test for MBR vs bootsector.
; 9a. Check entries. If any is invalid, go to 10 (rule A). ; 9a. Check entries. If any is invalid, go to 10 (rule A).
call is_partition_table_entry call is_partition_table_entry
@ -724,7 +724,7 @@ lock dec [partition_buffer_users] ; no, we must allocate
cmp byte [ebx], 0E9h cmp byte [ebx], 0E9h
jnz .mbr jnz .mbr
.notmbr: .notmbr:
; 10. This is not MBR. The media is not partitioned. Create one partition ; 10. This is not an MBR. The media is not partitioned. Create one partition
; which covers all the media and abort the loop. ; which covers all the media and abort the loop.
stdcall disk_add_partition, 0, 0, \ stdcall disk_add_partition, 0, 0, \
dword [esi+DISK.MediaInfo.Capacity], dword [esi+DISK.MediaInfo.Capacity+4] dword [esi+DISK.MediaInfo.Capacity], dword [esi+DISK.MediaInfo.Capacity+4]