| 0,0 → 1,69 |
|---|
| /* Copyright (C) 1996 DJ Delorie, see COPYING.DJ for details */ |
| /* Copyright (C) 1995 DJ Delorie, see COPYING.DJ for details */ |
| #include <libc/stubs.h> |
| #include <libc/bss.h> |
| #include <unistd.h> |
| #include <stdio.h> |
| #include <string.h> |
| |
| static int mktemp_count = -1; |
| |
| char * |
| mktemp (char *_template) |
| { |
| static int count = 0; |
| char *cp, *dp; |
| int i, len, xcount, loopcnt; |
| |
| /* Reinitialize counter if we were restarted (emacs). */ |
| if (__bss_count != mktemp_count) |
| { |
| mktemp_count = __bss_count; |
| count = 0; |
| } |
| |
| len = strlen (_template); |
| cp = _template + len; |
| |
| xcount = 0; |
| while (xcount < 6 && cp > _template && cp[-1] == 'X') |
| xcount++, cp--; |
| |
| if (xcount) { |
| dp = cp; |
| while (dp > _template && dp[-1] != '/' && dp[-1] != '\\' && dp[-1] != ':') |
| dp--; |
| |
| /* Keep the first characters of the template, but turn the rest into |
| Xs. */ |
| while (cp > dp + 8 - xcount) { |
| *--cp = 'X'; |
| xcount = (xcount >= 6) ? 6 : 1 + xcount; |
| } |
| |
| /* If dots occur too early -- squash them. */ |
| while (dp < cp) { |
| if (*dp == '.') *dp = 'a'; |
| dp++; |
| } |
| |
| /* Try to add ".tmp" to the filename. Truncate unused Xs. */ |
| if (cp + xcount + 3 < _template + len) |
| strcpy (cp + xcount, ".tmp"); |
| else |
| cp[xcount] = 0; |
| |
| /* This loop can run up to 2<<(5*6) times, or about 10^9 times. */ |
| for (loopcnt = 0; loopcnt < (1 << (5 * xcount)); loopcnt++) { |
| int c = count++; |
| for (i = 0; i < xcount; i++, c >>= 5) |
| cp[i] = "abcdefghijklmnopqrstuvwxyz012345"[c & 0x1f]; |
| if (!__file_exists(_template)) |
| return _template; |
| } |
| } |
| |
| /* Failure: truncate the template and return NULL. */ |
| *_template = 0; |
| return 0; |
| } |