使用Ufun的CFI函数直接判断文件夹和文件等操作

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& X4 n' ]- v: N( x& }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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. ~3 O1 h3 A5 s+ w+ K6 D9 guc4560 (view source)

: H2 x1 ]: d4 t- B: gDefined in: uf_cfi.h
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Overview
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Checks whether the specified file of the given type exists.

/ d3 A) q/ K8 N( l5 L$ MNOTE: Mixed or upper case file names may not be found if the
, ?, M, \- T. x: {3 V2 J: ~. ^/ }environment variable UGII_OPTION = LOWER is set.
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Passing an ftype of 0 will look for a file but does not work for a directory.
# i5 [" n$ N+ X5 _- y% ATo check for a directory the ftype must be set to 100.
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Return
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, S; p4 z* r) hReturn code:
2 T5 ?# C; w, k' ~< 0 = Error
= 0 = File Exists
= 1 = File Does Not Exist
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4 n/ Z  f+ ?/ n7 t. A) lEnvironment
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5 A8 V' O( t' Q7 p7 M' i7 B: R2 ZInternal and External
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; n4 G* }+ k5 i$ M0 c: i% ~See Also
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/ [8 t) ]% o) E1 |# n( A' rFor description of file types see table
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8 M2 }8 M/ o1 }& U9 nint uc4560
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; K! u0 n3 r5 |6 T" E  G$ e' ^const char * fspec,
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const char *	fspec	Input	File to check
int	ftype	Input	File type % p6 G( f0 p+ c2 j; I. \3 F0 will check for files 3 B3 N/ t  K: v& m% w100 will check for directories

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查找文件也可以通过UF_CFI_ask_file_exist
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UF_CFI_ask_file_exist (view source)

0 x- \- @9 _) y$ b1 \' n+ F6 g, nDefined in: uf_cfi.h
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Overview

Test if a file exists.
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Note: This function only works with files - not directories. To check if a
directory exists use uc4560 and pass a file type of 100.

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Return
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0 - No error
Otherwise - Error Code
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Environment

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History
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Originally released in V16.0
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( J- Z/ \, ], P5 s* `5 j, i; yRequired License(s)

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int UF_CFI_ask_file_exist
(
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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 L7 D3 G2 C6 S1 - file does not exist