int
bws_iterator_cmp(bwstring_iterator iter1, bwstring_iterator iter2, size_t len)
{
wchar_t c1, c2;
size_t i = 0;
for (i = 0; i < len; ++i) {
c1 = bws_get_iter_value(iter1);
c2 = bws_get_iter_value(iter2);
if (c1 != c2)
return (c1 - c2);
iter1 = bws_iterator_inc(iter1, 1);
iter2 = bws_iterator_inc(iter2, 1);
}
return (0);
}
/*
* Read string s and parse the string into a fixed-decimal-point number.
* sign equals -1 if the number is negative (explicit plus is not allowed,
* according to GNU sort's "info sort".
* The number part before decimal point is in the smain, after the decimal
* point is in sfrac, tail is the pointer to the remainder of the string.
*/
static int
read_number(struct bwstring *s0, int *sign, wchar_t *smain, size_t *main_len, wchar_t *sfrac, size_t *frac_len, unsigned char *si)
{
bwstring_iterator s;
s = bws_begin(s0);
/* always end the fraction with zero, even if we have no fraction */
sfrac[0] = 0;
while (iswblank(bws_get_iter_value(s)))
s = bws_iterator_inc(s, 1);
if (bws_get_iter_value(s) == (wchar_t)symbol_negative_sign) {
*sign = -1;
s = bws_iterator_inc(s, 1);
}
// This is '0', not '\0', do not change this
while (iswdigit(bws_get_iter_value(s)) &&
(bws_get_iter_value(s) == L'0'))
s = bws_iterator_inc(s, 1);
while (bws_get_iter_value(s) && *main_len < MAX_NUM_SIZE) {
if (iswdigit(bws_get_iter_value(s))) {
smain[*main_len] = bws_get_iter_value(s);
s = bws_iterator_inc(s, 1);
*main_len += 1;
} else if (symbol_thousands_sep &&
(bws_get_iter_value(s) == (wchar_t)symbol_thousands_sep))
s = bws_iterator_inc(s, 1);
else
break;
}
smain[*main_len] = 0;
if (bws_get_iter_value(s) == (wchar_t)symbol_decimal_point) {
s = bws_iterator_inc(s, 1);
while (iswdigit(bws_get_iter_value(s)) &&
*frac_len < MAX_NUM_SIZE) {
sfrac[*frac_len] = bws_get_iter_value(s);
s = bws_iterator_inc(s, 1);
*frac_len += 1;
}
sfrac[*frac_len] = 0;
while (*frac_len > 0 && sfrac[*frac_len - 1] == L'0') {
--(*frac_len);
sfrac[*frac_len] = L'\0';
}
}
setsuffix(bws_get_iter_value(s),si);
if ((*main_len + *frac_len) == 0)
*sign = 0;
return (0);
}
/*
* Find string suffix of format: (\.[A-Za-z~][A-Za-z0-9~]*)*$
* Set length of string before suffix.
*/
static void
find_suffix(bwstring_iterator si, bwstring_iterator se, size_t *len)
{
wchar_t c;
size_t clen;
bool expect_alpha, sfx;
sfx = false;
expect_alpha = false;
*len = 0;
clen = 0;
while ((si < se) && (c = bws_get_iter_value(si))) {
if (expect_alpha) {
expect_alpha = false;
if (!isalpha_clocale(c) && (c != L'~'))
sfx = false;
} else if (c == L'.') {
expect_alpha = true;
if (!sfx) {
sfx = true;
*len = clen;
}
} else if (!isalnum_clocale(c) && (c != L'~'))
sfx = false;
si = bws_iterator_inc(si, 1);
++clen;
}
/* This code must be here to make the implementation compatible
* with WORDING of GNU sort documentation.
* But the GNU sort implementation is not following its own
* documentation. GNU sort allows empty file extensions
* (just dot with nothing after); but the regular expression in
* their documentation does not allow empty file extensions.
* We chose to make our implementation compatible with GNU sort
* implementation. If they will ever fix their bug, this code
* must be uncommented. Or they may choose to fix the info page,
* then the code stays commented.
*
if (expect_alpha)
sfx = false;
*/
if (!sfx)
*len = clen;
}
static int
cmpversions(bwstring_iterator si1, bwstring_iterator se1,
bwstring_iterator si2, bwstring_iterator se2)
{
int cmp, diff;
while ((si1 < se1) || (si2 < se2)) {
diff = 0;
while (((si1 < se1) &&
!isdigit_clocale(bws_get_iter_value(si1))) ||
((si2 < se2) && !isdigit_clocale(bws_get_iter_value(si2)))) {
wchar_t c1, c2;
c1 = (si1 < se1) ? bws_get_iter_value(si1) : 0;
c2 = (si2 < se2) ? bws_get_iter_value(si2) : 0;
cmp = cmp_chars(c1, c2);
if (cmp)
return (cmp);
if (si1 < se1)
si1 = bws_iterator_inc(si1, 1);
if (si2 < se2)
si2 = bws_iterator_inc(si2, 1);
}
while (bws_get_iter_value(si1) == L'0')
si1 = bws_iterator_inc(si1, 1);
while (bws_get_iter_value(si2) == L'0')
si2 = bws_iterator_inc(si2, 1);
while (isdigit_clocale(bws_get_iter_value(si1)) &&
isdigit_clocale(bws_get_iter_value(si2))) {
if (!diff)
diff = ((int)bws_get_iter_value(si1) -
(int)bws_get_iter_value(si2));
si1 = bws_iterator_inc(si1, 1);
si2 = bws_iterator_inc(si2, 1);
}
if (isdigit_clocale(bws_get_iter_value(si1)))
return (1);
if (isdigit_clocale(bws_get_iter_value(si2)))
return (-1);
if (diff)
return (diff);
}
return (0);
}
/*
* Compare two version strings
*/
int
vcmp(struct bwstring *s1, struct bwstring *s2)
{
bwstring_iterator si1, si2;
wchar_t c1, c2;
size_t len1, len2, slen1, slen2;
int cmp_bytes, cmp_res;
if (s1 == s2)
return (0);
cmp_bytes = bwscmp(s1, s2, 0);
if (cmp_bytes == 0)
return (0);
len1 = slen1 = BWSLEN(s1);
len2 = slen2 = BWSLEN(s2);
if (slen1 < 1)
return (-1);
if (slen2 < 1)
return (+1);
si1 = bws_begin(s1);
si2 = bws_begin(s2);
c1 = bws_get_iter_value(si1);
c2 = bws_get_iter_value(si2);
if (c1 == L'.' && (slen1 == 1))
return (-1);
if (c2 == L'.' && (slen2 == 1))
return (+1);
if (slen1 == 2 && c1 == L'.' &&
bws_get_iter_value(bws_iterator_inc(si1, 1)) == L'.')
return (-1);
if (slen2 == 2 && c2 == L'.' &&
bws_get_iter_value(bws_iterator_inc(si2, 1)) == L'.')
return (+1);
if (c1 == L'.' && c2 != L'.')
return (-1);
if (c1 != L'.' && c2 == L'.')
return (+1);
if (c1 == L'.' && c2 == L'.') {
si1 = bws_iterator_inc(si1, 1);
si2 = bws_iterator_inc(si2, 1);
}
find_suffix(si1, bws_end(s1), &len1);
find_suffix(si2, bws_end(s2), &len2);
if ((len1 == len2) && (bws_iterator_cmp(si1, si2, len1) == 0))
return (cmp_bytes);
cmp_res = cmpversions(si1, bws_iterator_inc(si1, len1), si2,
bws_iterator_inc(si2, len2));
if (cmp_res == 0)
cmp_res = cmp_bytes;
return (cmp_res);
}
