mirror of
https://github.com/git/git.git
synced 2024-10-30 13:57:54 +01:00
9ef176b55c
--sort=version:refname (or --sort=v:refname for short) sorts tags as if they are versions. --sort=-refname reverses the order (with or without ":version"). versioncmp() is copied from string/strverscmp.c in glibc commit ee9247c38a8def24a59eb5cfb7196a98bef8cfdc, reformatted to Git coding style. The implementation is under LGPL-2.1 and according to [1] I can relicense it to GPLv2. [1] http://www.gnu.org/licenses/gpl-faq.html#AllCompatibility Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
93 lines
2.1 KiB
C
93 lines
2.1 KiB
C
#include "cache.h"
|
|
|
|
/*
|
|
* versioncmp(): copied from string/strverscmp.c in glibc commit
|
|
* ee9247c38a8def24a59eb5cfb7196a98bef8cfdc, reformatted to Git coding
|
|
* style. The implementation is under LGPL-2.1 and Git relicenses it
|
|
* to GPLv2.
|
|
*/
|
|
|
|
/*
|
|
* states: S_N: normal, S_I: comparing integral part, S_F: comparing
|
|
* fractionnal parts, S_Z: idem but with leading Zeroes only
|
|
*/
|
|
#define S_N 0x0
|
|
#define S_I 0x3
|
|
#define S_F 0x6
|
|
#define S_Z 0x9
|
|
|
|
/* result_type: CMP: return diff; LEN: compare using len_diff/diff */
|
|
#define CMP 2
|
|
#define LEN 3
|
|
|
|
|
|
/*
|
|
* Compare S1 and S2 as strings holding indices/version numbers,
|
|
* returning less than, equal to or greater than zero if S1 is less
|
|
* than, equal to or greater than S2 (for more info, see the texinfo
|
|
* doc).
|
|
*/
|
|
|
|
int versioncmp(const char *s1, const char *s2)
|
|
{
|
|
const unsigned char *p1 = (const unsigned char *) s1;
|
|
const unsigned char *p2 = (const unsigned char *) s2;
|
|
unsigned char c1, c2;
|
|
int state, diff;
|
|
|
|
/*
|
|
* Symbol(s) 0 [1-9] others
|
|
* Transition (10) 0 (01) d (00) x
|
|
*/
|
|
static const uint8_t next_state[] = {
|
|
/* state x d 0 */
|
|
/* S_N */ S_N, S_I, S_Z,
|
|
/* S_I */ S_N, S_I, S_I,
|
|
/* S_F */ S_N, S_F, S_F,
|
|
/* S_Z */ S_N, S_F, S_Z
|
|
};
|
|
|
|
static const int8_t result_type[] = {
|
|
/* state x/x x/d x/0 d/x d/d d/0 0/x 0/d 0/0 */
|
|
|
|
/* S_N */ CMP, CMP, CMP, CMP, LEN, CMP, CMP, CMP, CMP,
|
|
/* S_I */ CMP, -1, -1, +1, LEN, LEN, +1, LEN, LEN,
|
|
/* S_F */ CMP, CMP, CMP, CMP, CMP, CMP, CMP, CMP, CMP,
|
|
/* S_Z */ CMP, +1, +1, -1, CMP, CMP, -1, CMP, CMP
|
|
};
|
|
|
|
if (p1 == p2)
|
|
return 0;
|
|
|
|
c1 = *p1++;
|
|
c2 = *p2++;
|
|
/* Hint: '0' is a digit too. */
|
|
state = S_N + ((c1 == '0') + (isdigit (c1) != 0));
|
|
|
|
while ((diff = c1 - c2) == 0) {
|
|
if (c1 == '\0')
|
|
return diff;
|
|
|
|
state = next_state[state];
|
|
c1 = *p1++;
|
|
c2 = *p2++;
|
|
state += (c1 == '0') + (isdigit (c1) != 0);
|
|
}
|
|
|
|
state = result_type[state * 3 + (((c2 == '0') + (isdigit (c2) != 0)))];
|
|
|
|
switch (state) {
|
|
case CMP:
|
|
return diff;
|
|
|
|
case LEN:
|
|
while (isdigit (*p1++))
|
|
if (!isdigit (*p2++))
|
|
return 1;
|
|
|
|
return isdigit (*p2) ? -1 : diff;
|
|
|
|
default:
|
|
return state;
|
|
}
|
|
}
|