projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| a3209dfc WJ |
1 | /* std.c - compensate for a few missing library functions. |
| 2 | In the Public Domain; written by Mike Haertel. */ | |
| 3 | ||
| 4 | #include "std.h" | |
| 5 | #include "unix.h" | |
| 6 | ||
| 7 | #ifdef X_memmove | |
| 8 | PTR | |
| 9 | DEFUN(memmove, (d, s, n), PTR d AND PTRCONST s AND size_t n) | |
| 10 | { | |
| 11 | char *dd; | |
| 12 | const char *ss; | |
| 13 | ||
| 14 | dd = d; | |
| 15 | ss = s; | |
| 16 | if (dd > ss && dd < ss + n) | |
| 17 | { | |
| 18 | dd += n; | |
| 19 | ss += n; | |
| 20 | while (n--) | |
| 21 | *--dd = *--ss; | |
| 22 | } | |
| 23 | else | |
| 24 | while (n--) | |
| 25 | *dd++ = *ss++; | |
| 26 | return d; | |
| 27 | } | |
| 28 | #endif /* X_memmove */ | |
| 29 | ||
| 30 | #ifdef X_remove | |
| 31 | #if defined(unix) || defined(__unix__) | |
| 32 | int | |
| 33 | DEFUN(remove, (filename), const char *filename) | |
| 34 | { | |
| 35 | extern int EXFUN(unlink, (const char *)); | |
| 36 | ||
| 37 | return unlink(filename); | |
| 38 | } | |
| 39 | #endif /* unix */ | |
| 40 | #endif /* X_strerror */ | |
| 41 | ||
| 42 | #ifdef X_strerror | |
| 43 | #if defined(unix) || defined(__unix__) | |
| 44 | char * | |
| 45 | DEFUN(strerror, (errnum), int errnum) | |
| 46 | { | |
| 47 | extern int sys_nerr; | |
| 48 | extern char *sys_errlist[]; | |
| 49 | ||
| 50 | if (errnum > 0 && errnum < sys_nerr) | |
| 51 | return sys_errlist[errnum]; | |
| 52 | return ""; | |
| 53 | } | |
| 54 | #endif /* unix */ | |
| 55 | #endif /* X_strerror */ |