使用Ufun的CFI函数直接判断文件夹和文件等操作

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在进行相关文件和文件路径判断时候，ufun提供了内置的方法。
UC4560 通过设置第二个 参数为 100 可以判断文件夹，通过设置 为 0 可以查找文件。
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uc4560 (view source)
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Defined in: uf_cfi.h


Overview
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Checks whether the specified file of the given type exists.
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3 S1 J; w' r4 s- ]" W% K0 INOTE: Mixed or upper case file names may not be found if the
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$ t5 }  f2 m; O' d. x9 uPassing an ftype of 0 will look for a file but does not work for a directory.
To check for a directory the ftype must be set to 100.
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Return
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Return code:
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= 0 = File Exists
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Environment

Internal and External
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For description of file types see table
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+ O4 }: l( r/ eint uc4560
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const char * fspec,
int ftype

)

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const char *	fspec	Input	File to check
int	ftype	Input	File type 0 will check for files 100 will check for directories

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* o+ @, W- P4 e5 I3 l查找文件也可以通过UF_CFI_ask_file_exist

UF_CFI_ask_file_exist (view source)

Defined in: uf_cfi.h
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Test if a file exists.

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directory exists use uc4560 and pass a file type of 100.
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Return

- Q; N: j+ O' l8 c0 - No error
Otherwise - Error Code
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Environment
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Originally released in V16.0


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* b/ I1 @3 G6 \% Sint UF_CFI_ask_file_exist
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, g2 b' r, m+ v1 \. J6 U; rconst char * file_spec,
int * status
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const char *	file_spec	Input	The file to check
int *	status	Output	File existence status. 0 - file exists 1 - file does not exist

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