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en:docs:fapi:dosnewsize [2021/08/20 04:17] – prokushev | en:docs:fapi:dosnewsize [2021/12/05 10:58] (current) – prokushev | ||
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This call changes the size of a file. | This call changes the size of a file. | ||
- | ==Syntax== | + | ===== Syntax |
- | | + | <code c> |
+ | DosNewSize (FileHandle, | ||
+ | </ | ||
- | ==Parameters== | + | ===== Parameters ===== |
- | ;FileHandle (HFILE) - input : Handle of the file whose size is being changed. | + | |
- | ;FileSize (ULONG) - input : File's new size in bytes. | + | |
+ | | ||
+ | |||
+ | ===== Return Code ===== | ||
+ | |||
+ | rc ([[USHORT]]) - return | ||
- | ==Return Code== | ||
- | rc (USHORT) - return | ||
Return code descriptions are: | Return code descriptions are: | ||
- | * 0 NO_ERROR | ||
- | * 5 ERROR_ACCESS_DENIED | ||
- | * 6 ERROR_INVALID_HANDLE | ||
- | * 26 | ||
- | * 33 | ||
- | * 87 | ||
- | * 112 ERROR_DISK_FULL | ||
- | ==Remarks== | + | * 0 NO_ERROR |
- | When DosNewSize is called, the file must be open in a mode that allows write access. If the file is a read-only file, its read-only status must be changed with DosSetFileMode before you can open the file for write access. | + | * 5 ERROR_ACCESS_DENIED |
+ | * 6 ERROR_INVALID_HANDLE | ||
+ | * 26 | ||
+ | * 33 | ||
+ | * 87 | ||
+ | * 112 ERROR_DISK_FULL | ||
+ | |||
+ | ===== Remarks ===== | ||
+ | |||
+ | When DosNewSize is called, the file must be open in a mode that allows write access. If the file is a read-only file, its read-only status must be changed with [[DosSetFileMode]] before you can open the file for write access. | ||
The open file can be truncated or extended in size. If the file is being extended, the file system makes a reasonable attempt to allocate the additional bytes for the file in a contiguous (or nearly contiguous) space on the medium. The value of the new bytes is undefined. | The open file can be truncated or extended in size. If the file is being extended, the file system makes a reasonable attempt to allocate the additional bytes for the file in a contiguous (or nearly contiguous) space on the medium. The value of the new bytes is undefined. | ||
- | ==Example Code== | + | ===== Example Code ===== |
- | === C Binding=== | + | |
- | <PRE> | + | ==== C Binding==== |
+ | <code c> | ||
#define INCL_DOSFILEMGR | #define INCL_DOSFILEMGR | ||
Line 39: | Line 47: | ||
USHORT | USHORT | ||
- | </PRE> | + | </code> |
- | ===MASM Binding=== | + | ==== MASM Binding |
- | <PRE> | + | <code asm> |
EXTRN DosNewSize: | EXTRN DosNewSize: | ||
INCL_DOSFILEMGR | INCL_DOSFILEMGR | ||
Line 49: | Line 57: | ||
PUSH | PUSH | ||
CALL | CALL | ||
+ | |||
+ | </ | ||
Returns WORD | Returns WORD | ||
- | </ | ||
- | |||
- | |||
- | ====== Note ====== | + | ===== Note ===== |
Text based on http:// | Text based on http:// |