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。
- k& k9 H1 @, g' g/ qUC4560 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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1 Q1 C$ h2 T$ J. guc4560 (view source)

Defined in: uf_cfi.h


Overview

Checks whether the specified file of the given type exists.
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NOTE: Mixed or upper case file names may not be found if the
  K/ s# b, M$ q9 genvironment variable UGII_OPTION = LOWER is set.

+ H# g5 V% o! \6 N' q& I# 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:
  Z* ~  n3 z* ]8 W' ?' R( y9 ~< 0 = Error
6 W3 S! z" A' d* I% q= 0 = File Exists
1 t' {' R6 T0 p5 h2 _3 }* o( B5 G= 1 = File Does Not Exist


4 H  R; E# t, j! p, k8 NEnvironment
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9 r# C* l% T0 K- ]  U$ T2 o" z" KInternal and External
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. D( k5 Y0 i# XSee Also
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: @4 o$ e2 b. ^5 lFor description of file types see table


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gateway
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int uc4560
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const char * fspec,
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const char *	fspec	Input	File to check
int	ftype	Input	File type 0 will check for files 4 t& b# R$ w9 _2 N+ l100 will check for directories

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( @6 g9 I3 K& d( N/ I查找文件也可以通过UF_CFI_ask_file_exist
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8 `3 N# v. q/ h& O7 T/ UUF_CFI_ask_file_exist (view source)

Defined 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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! q+ b8 \, D$ u* j: d5 m0 - No error
3 \6 Q- n  V7 w2 V4 b5 [Otherwise - Error Code

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Internal and External
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History
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Originally released in V16.0
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int UF_CFI_ask_file_exist
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/ J9 k6 o$ f. G$ gint * status
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const char *	file_spec	Input	The file to check
int *	status	Output	File existence status. ( Q3 @+ A" q' K8 m. @, a0 k0 - file exists 1 - file does not exist   G$ H/ I/ a' H; q  u