56 lines
984 B
C
56 lines
984 B
C
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/* std.c - compensate for a few missing library functions.
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In the Public Domain; written by Mike Haertel. */
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#include "std.h"
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#include "unix.h"
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#ifdef X_memmove
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PTR
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DEFUN(memmove, (d, s, n), PTR d AND PTRCONST s AND size_t n)
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{
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char *dd;
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const char *ss;
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dd = d;
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ss = s;
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if (dd > ss && dd < ss + n)
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{
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dd += n;
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ss += n;
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while (n--)
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*--dd = *--ss;
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}
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else
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while (n--)
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*dd++ = *ss++;
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return d;
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}
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#endif /* X_memmove */
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#ifdef X_remove
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#if defined(unix) || defined(__unix__)
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int
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DEFUN(remove, (filename), const char *filename)
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{
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extern int EXFUN(unlink, (const char *));
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return unlink(filename);
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}
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#endif /* unix */
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#endif /* X_strerror */
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#ifdef X_strerror
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#if defined(unix) || defined(__unix__)
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char *
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DEFUN(strerror, (errnum), int errnum)
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{
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extern int sys_nerr;
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extern char *sys_errlist[];
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if (errnum > 0 && errnum < sys_nerr)
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return sys_errlist[errnum];
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return "";
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}
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#endif /* unix */
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#endif /* X_strerror */
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