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)

Defined in: uf_cfi.h

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Overview
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( q2 a, x4 [  k% E( v5 c) u5 u# LChecks whether the specified file of the given type exists.

NOTE: Mixed or upper case file names may not be found if the
/ ~! u" I, J  ~7 Aenvironment variable UGII_OPTION = LOWER is set.

4 e  `0 Y) u: m, v: B( APassing an ftype of 0 will look for a file but does not work for a directory.
" m( p* U) ?9 z3 a/ f( gTo check for a directory the ftype must be set to 100.
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# O% P/ p" `; J6 j  Q! W1 HReturn

Return code:
< 0 = Error
2 s. a$ p2 ~3 R= 0 = File Exists
* h4 V1 L, Z/ ]5 w$ I6 c! z4 J= 1 = File Does Not Exist
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9 m6 S& Y$ v8 @9 c/ q; t9 _+ {* D5 h! lEnvironment

* h: ?( F. V9 V- b* u7 i8 I5 T  HInternal and External
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7 R4 C/ G; {) B5 B, F7 Z; {; R- S. e. XSee Also
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0 U' i4 E0 m" K5 g5 ]0 I( x  S& }$ _For description of file types see table
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+ @' }5 C8 t6 W6 b" BRequired License(s)

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0 q/ A& L3 u+ V* uint uc4560
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: r4 }5 ^% f4 I, D! P: h0 |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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, y! s( g2 @! _8 C0 d. i查找文件也可以通过UF_CFI_ask_file_exist

3 x5 j8 t1 W& S' W0 s& \UF_CFI_ask_file_exist (view source)
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Defined in: uf_cfi.h

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Overview
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Test if a file exists.

. f6 ~" [2 k- a& r; hNote: This function only works with files - not directories. To check if a
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. S9 b& L/ }! z2 ~" k  zReturn
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, M! D" k/ o" e  V* O! L; O7 p0 - No error
. l! h4 [5 }# I7 rOtherwise - Error Code


9 S8 t; b, D" K1 g4 s7 WEnvironment
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: q) i% v# O1 TInternal and External
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& F1 M6 a/ {0 {4 s! k7 g6 J+ V* ]History
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Originally released in V16.0


Required 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. & }. \% z; q; v" O% M$ W0 - file exists 1 - file does not exist ! u6 c8 [( a4 f. Y* r7 m " u0 [! c$ B3 F  Y9 n) I

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