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git-svn-id: svn://svn.compuextreme.de/Viitor/V963/Viitor_cc65@5933 504e572c-2e33-0410-9681-be2bf7408885
65 lines
2.1 KiB
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65 lines
2.1 KiB
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<TITLE>cc65 function reference: Alphabetical function reference: strncpy</TITLE>
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<H2><A NAME="strncpy"></A> 3.151 <A HREF="funcref.html#toc3.151">strncpy</A></H2>
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<P>
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<BLOCKQUOTE>
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<DL>
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<DT><B>Function</B><DD><P>Copy part of a string.</P>
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<DT><B>Header</B><DD><P><CODE>
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<A HREF="funcref-39.html#string.h">string.h</A></CODE></P>
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<DT><B>Declaration</B><DD><P><CODE>char* __fastcall__ strcpy (char* s1, const char* s2, size_t n);</CODE></P>
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<DT><B>Description</B><DD><P>The <CODE>strncpy</CODE> function copies not more than n bytes from
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the array pointed to by <CODE>s2</CODE> to the array pointed to by <CODE>s1</CODE>. If the array
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pointed to by <CODE>s2</CODE> is a string that is shorter than n bytes, null bytes are
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appended to the copy in the array pointed to by <CODE>s1</CODE>, until <CODE>n</CODE> bytes are
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written. The function will always return <CODE>s1</CODE>.</P>
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<DT><B>Limits</B><DD><P>
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<UL>
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<LI>The function is only available as fastcall function, so it may only
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be used in presence of a prototype. If there is no null byte in the first <CODE>n</CODE>
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bytes of the array pointed to by <CODE>s2</CODE>, the result is not null-terminated.</LI>
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<LI>If copying takes place between objects that overlap, the behaviour is
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undefined.</LI>
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</UL>
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</P>
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<DT><B>Availability</B><DD><P>ISO 9899</P>
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<DT><B>See also</B><DD><P>
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<A HREF="funcref-182.html#strcat">strcat</A>,
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<A HREF="funcref-186.html#strcpy">strcpy</A>,
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<A HREF="funcref-194.html#strncat">strncat</A></P>
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<DT><B>Example</B><DD><P>
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<PRE>
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#include <string.h>
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static char hello[6];
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strcpy (hello, "Hello world!\n", sizeof (hello) - 1);
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hello[5] = '\0';
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</PRE>
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