git/versioncmp.c

#define USE_THE_REPOSITORY_VARIABLE

#include "git-compat-util.h"
#include "config.h"
#include "strbuf.h"
#include "string-list.h"
#include "versioncmp.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 …
#define S_I …
#define S_F …
#define S_Z …

/* result_type: CMP: return diff; LEN: compare using len_diff/diff */
#define CMP …
#define LEN …

static const struct string_list *prereleases;
static int initialized;

struct suffix_match { … };

static void find_better_matching_suffix(const char *tagname, const char *suffix,
					int suffix_len, int start, int conf_pos,
					struct suffix_match *match)
{ … }

/*
 * off is the offset of the first different character in the two strings
 * s1 and s2. If either s1 or s2 contains a prerelease suffix containing
 * that offset or a suffix ends right before that offset, then that
 * string will be forced to be on top.
 *
 * If both s1 and s2 contain a (different) suffix around that position,
 * their order is determined by the order of those two suffixes in the
 * configuration.
 * If any of the strings contains more than one different suffixes around
 * that position, then that string is sorted according to the contained
 * suffix which starts at the earliest offset in that string.
 * If more than one different contained suffixes start at that earliest
 * offset, then that string is sorted according to the longest of those
 * suffixes.
 *
 * Return non-zero if *diff contains the return value for versioncmp()
 */
static int swap_prereleases(const char *s1,
			    const char *s2,
			    int off,
			    int *diff)
{ … }

/*
 * 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)
{ … }