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https://github.com/QB64Official/qb64.git
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78 lines
2.1 KiB
QBasic
78 lines
2.1 KiB
QBasic
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''' Duplicates the contents of one file into another.
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''' Returns: 0 on success, 1 on error.
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FUNCTION CopyFile& (sourceFile$, destFile$)
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DIM sourcefileNo, destFileNo
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DIM fileLength AS _INTEGER64
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result = 0
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sourceFileNo = FREEFILE
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OPEN sourceFile$ FOR BINARY AS #sourceFileNo
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if result = 1 THEN GOTO errorCleanup
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fileLength = LOF(sourceFileNo)
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destFileNo = FREEFILE
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OPEN destFile$ FOR BINARY AS #destFileNo
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if result = 1 THEN GOTO errorCleanup
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' Read the file in one go
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buffer$ = SPACE$(fileLength)
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GET #sourceFileNo, , buffer$
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PUT #destFileNo, , buffer$
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ErrorCleanup:
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IF sourceFileNo <> 0 THEN CLOSE #sourceFileNo
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IF destFileNo <> 0 THEN CLOSE #destFileNo
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CopyFile& = result
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END FUNCTION
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''' Splits the filename from its path and returns the path.
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''' Returns: The path or empty if no path.
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FUNCTION GetFilePath$ (f$)
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FOR i = LEN(f$) TO 1 STEP -1
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a$ = MID$(f$, i, 1)
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IF a$ = "/" OR a$ = "\" THEN
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GetFilePath$ = LEFT$(f$, i)
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EXIT FUNCTION
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END IF
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NEXT
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GetFilePath$ = ""
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END FUNCTION
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''' Checks if a filename has an extension on the end.
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''' Returns: True if provided filename has an extension.
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FUNCTION FileHasExtension (f$)
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FOR i = LEN(f$) TO 1 STEP -1
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a = ASC(f$, i)
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IF a = 47 OR a = 92 THEN EXIT FOR
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IF a = 46 THEN FileHasExtension = -1: EXIT FUNCTION
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NEXT
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END FUNCTION
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''' Removes the extension off of a filename.
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''' Returns: Provided filename without extension on the end.
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FUNCTION RemoveFileExtension$ (f$)
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FOR i = LEN(f$) TO 1 STEP -1
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a = ASC(f$, i)
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IF a = 47 OR a = 92 THEN EXIT FOR
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IF a = 46 THEN RemoveFileExtension$ = LEFT$(f$, i - 1): EXIT FUNCTION
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NEXT
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RemoveFileExtension$ = f$
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END FUNCTION
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''' Fixes the provided filename and path to use the correct path separator.
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SUB PATH_SLASH_CORRECT (a$)
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IF os$ = "WIN" THEN
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FOR x = 1 TO LEN(a$)
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IF ASC(a$, x) = 47 THEN ASC(a$, x) = 92
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NEXT
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ELSE
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FOR x = 1 TO LEN(a$)
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IF ASC(a$, x) = 92 THEN ASC(a$, x) = 47
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NEXT
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END IF
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END SUB
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