the means of mbstowcs parameter

[zade]

the function prototype is like below:

size_t mbstowcs( wchar_t* wcstr, const char* mbstr, size_t count )

in MSDN, parameter 'count ' means :"The number of multibyte
characters to convert".

it cplusplus.com(like unix and linux man page), parameter 'count '
means :"Maximum number of wchar_t characters to be interpreted".

so, which one is right? and should I make some workrounds to call this
function in different OS ?

 

[Ian Collins]

zade wrote:

Please don't multi-post, answered elsewhere.

 

[zade]

I fail to see the difference. Different terms, same meaning.

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In MSDN, it means the number of multibyte characters; while in some
cases, count = strlen(mbstr).
In others, it means the capacity of the wcstr.
Let me give an example:

In MSDN:
const char* mstr = "abc123";
const static size_t MAX_LEN = 100;
const wchar_t wstr[MAX_LEN];
mbstowcs(mstr,wstr,strlen(mstr));

In others:
const char* mstr = "abc123";
const static size_t MAX_LEN = 100;
const wchar_t wstr[MAX_LEN];
mbstowcs(mstr,wstr,MAX_LEN);

Is that OK?

 

[Ian Collins]

In MSDN, it means the number of multibyte characters; while in some
cases, count = strlen(mbstr).
In others, it means the capacity of the wcstr.
Let me give an example:

In MSDN:
const char* mstr = "abc123";
const static size_t MAX_LEN = 100;
const wchar_t wstr[MAX_LEN];
mbstowcs(mstr,wstr,strlen(mstr));

In others:
const char* mstr = "abc123";
const static size_t MAX_LEN = 100;
const wchar_t wstr[MAX_LEN];
mbstowcs(mstr,wstr,MAX_LEN);

Is that OK?

See my answer in c.l.c.