CHAR * simple_STRCHR (const CHAR *s, int c) { for (; *s != (CHAR) c; ++s) if (*s == '\0') return NULLRET ((CHAR *) s); return (CHAR *) s; }
CHAR * stupid_STRCHR (const CHAR *s, int c) { size_t n = STRLEN (s) + 1; while (n--) if (*s++ == (CHAR) c) return (CHAR *) s - 1; return NULLRET ((CHAR *) s - 1); }
static void do_test (size_t align, size_t pos, size_t len, int seek_char, int max_char) /* For wcschr: align here means align not in bytes, but in wchar_ts, in bytes it will equal to align * (sizeof (wchar_t)) len for wcschr here isn't in bytes but it's number of wchar_t symbols. */ { size_t i; CHAR *result; CHAR *buf = (CHAR *) buf1; align &= 15; if ((align + len) * sizeof (CHAR) >= page_size) return; for (i = 0; i < len; ++i) { buf[align + i] = 32 + 23 * i % max_char; if (buf[align + i] == seek_char) buf[align + i] = seek_char + 1; else if (buf[align + i] == 0) buf[align + i] = 1; } buf[align + len] = 0; if (pos < len) { buf[align + pos] = seek_char; result = buf + align + pos; } else if (seek_char == 0) result = buf + align + len; else result = NULLRET (buf + align + len); printf ("Length %4zd, alignment in bytes %2zd:", pos, align * sizeof (CHAR)); FOR_EACH_IMPL (impl, 0) do_one_test (impl, buf + align, seek_char, result); putchar ('\n'); }
static void do_random_tests (void) { size_t i, j, n, align, pos, len; int seek_char; CHAR *result; UCHAR *p = (UCHAR *) (buf1 + page_size - 512 * sizeof (CHAR)); for (n = 0; n < ITERATIONS; n++) { /* For wcschr: align here means align not in bytes, but in wchar_ts, in bytes it will equal to align * (sizeof (wchar_t)). */ align = random () & 15; pos = random () & 511; seek_char = random () & 255; if (pos + align >= 511) pos = 510 - align - (random () & 7); /* len for wcschr here isn't in bytes but it's number of wchar_t symbols. */ len = random () & 511; if ((pos == len && seek_char) || (pos > len && (random () & 1))) len = pos + 1 + (random () & 7); if (len + align >= 512) len = 511 - align - (random () & 7); if (pos == len && seek_char) len = pos + 1; j = (pos > len ? pos : len) + align + 64; if (j > 512) j = 512; for (i = 0; i < j; i++) { if (i == pos + align) p[i] = seek_char; else if (i == len + align) p[i] = 0; else { p[i] = random () & 255; if (i < pos + align && p[i] == seek_char) p[i] = seek_char + 13; if (i < len + align && !p[i]) { p[i] = seek_char - 13; if (!p[i]) p[i] = 140; } } } if (pos <= len) result = (CHAR *) (p + pos + align); else if (seek_char == 0) result = (CHAR *) (p + len + align); else result = NULLRET ((CHAR *) (p + len + align)); FOR_EACH_IMPL (impl, 1) if (CALL (impl, (CHAR *) (p + align), seek_char) != result) { error (0, 0, "Iteration %zd - wrong result in function \ %s (align in bytes: %zd, seek_char: %d, len: %zd, pos: %zd) %p != %p, p %p", n, impl->name, align * sizeof (CHAR), seek_char, len, pos, CALL (impl, (CHAR *) (p + align), seek_char), result, p); ret = 1; } }