FreeBSD-5.3/usr.sbin/pkg_install/lib/version.c
/*
* FreeBSD install - a package for the installation and maintenance
* of non-core utilities.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* Maxim Sobolev
* 31 July 2001
*
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/usr.sbin/pkg_install/lib/version.c,v 1.5 2004/06/29 18:52:12 eik Exp $");
#include "lib.h"
#include <err.h>
/*
* Routines to assist with PLIST_FMT_VER numbers in the packing
* lists.
*
* Following is the PLIST_FMT_VER history:
* 1.0 - Initial revision;
* 1.1 - When recording/checking checksum of symlink use hash of readlink()
* value instead of the hash of an object this links points to.
*
*/
int
verscmp(Package *pkg, int major, int minor)
{
int rval = 0;
if ((pkg->fmtver_maj < major) || (pkg->fmtver_maj == major &&
pkg->fmtver_mnr < minor))
rval = -1;
else if ((pkg->fmtver_maj > major) || (pkg->fmtver_maj == major &&
pkg->fmtver_mnr > minor))
rval = 1;
return rval;
}
/*
* split_version(pkgname, endname, epoch, revision) returns a pointer to
* the version portion of a package name and the two special components.
*
* Syntax is: ${PORTNAME}-${PORTVERSION}[_${PORTREVISION}][,${PORTEPOCH}]
*
* Written by Oliver Eikemeier
* Based on work of Jeremy D. Lea.
*/
static const char *
split_version(const char *pkgname, const char **endname, unsigned long *epoch, unsigned long *revision)
{
char *ch;
const char *versionstr;
const char *endversionstr;
if (pkgname == NULL)
errx(2, "%s: Passed NULL pkgname.", __func__);
/* Look for the last '-' the the pkgname */
ch = strrchr(pkgname, '-');
/* Cheat if we are just passed a version, not a valid package name */
versionstr = ch ? ch + 1 : pkgname;
/* Look for the last '_' in the version string, advancing the end pointer */
ch = strrchr(versionstr, '_');
if (revision != NULL) {
*revision = ch ? strtoul(ch + 1, NULL, 10) : 0;
}
endversionstr = ch;
/* Look for the last ',' in the remaining version string */
ch = strrchr(endversionstr ? endversionstr + 1 : versionstr, ',');
if (epoch != NULL) {
*epoch = ch ? strtoul(ch + 1, NULL, 10) : 0;
}
if (ch && !endversionstr)
endversionstr = ch;
/* set the pointer behind the last character of the version without revision or epoch */
if (endname)
*endname = endversionstr ? endversionstr : strrchr(versionstr, '\0');
return versionstr;
}
/*
* PORTVERSIONs are composed of components separated by dots. A component
* consists of a version number, a letter and a patchlevel number. This does
* not conform to the porter's handbook, but let us formulate rules that
* fit the current practice and are far simpler than to make decisions
* based on the order of netters and lumbers. Besides, people use versions
* like 10b2 in the ports...
*/
typedef struct {
#ifdef __LONG_LONG_SUPPORTED
long long n;
long long pl;
#else
long n;
long pl;
#endif
int a;
} version_component;
/*
* get_component(position, component) gets the value of the next component
* (number - letter - number triple) and returns a pointer to the next character
* after any leading separators
*
* - components are separated by dots
* - characters !~ [a-zA-Z0-9.+*] are treated as separators
* (1.0:2003.09.16 = 1.0.2003.09.16), this may not be what you expect:
* 1.0.1:2003.09.16 < 1.0:2003.09.16
* - consecutive separators are collapsed (10..1 = 10.1)
* - missing separators are inserted, essentially
* letter number letter => letter number . letter (10a1b2 = 10a1.b2)
* - missing components are assumed to be equal to 0 (10 = 10.0 = 10.0.0)
* - the letter sort order is: [none], a, b, ..., z; numbers without letters
* sort first (10 < 10a < 10b)
* - missing version numbers (in components starting with a letter) sort as -1
* (a < 0, 10.a < 10)
* - a separator is inserted before the special strings "pl", "alpha", "beta",
* "pre" and "rc".
* - "pl" sorts before every other letter, "alpha", "beta", "pre" and "rc"
* sort as a, b, p and r. (10alpha = 10.a < 10, but 10 < 10a; pl11 < alpha3
* < 0.1beta2 = 0.1.b2 < 0.1)
* - other strings use only the first letter for sorting, case is ignored
* (1.d2 = 1.dev2 = 1.Development2)
* - The special component `*' is guaranteed to be the smallest possible
* component (2.* < 2pl1 < 2alpha3 < 2.9f7 < 3.*)
* - components separated by `+' are handled by version_cmp below
*
* Oliver Eikemeier
*/
static const struct {
const char *name;
size_t namelen;
int value;
} stage[] = {
{ "pl", 2, 0 },
{ "alpha", 5, 'a'-'a'+1 },
{ "beta", 4, 'b'-'a'+1 },
{ "pre", 3, 'p'-'a'+1 },
{ "rc", 2, 'r'-'a'+1 },
{ NULL, 0, -1 }
};
static const char *
get_component(const char *position, version_component *component)
{
const char *pos = position;
int hasstage = 0, haspatchlevel = 0;
if (!pos)
errx(2, "%s: Passed NULL position.", __func__);
/* handle version number */
if (isdigit(*pos)) {
char *endptr;
#ifdef __LONG_LONG_SUPPORTED
component->n = strtoll(pos, &endptr, 10);
#else
component->n = strtol(pos, &endptr, 10);
#endif
/* should we test for errno == ERANGE? */
pos = endptr;
} else if (*pos == '*') {
component->n = -2;
do {
pos++;
} while(*pos && *pos != '+');
} else {
component->n = -1;
hasstage = 1;
}
/* handle letter */
if (isalpha(*pos)) {
int c = tolower(*pos);
haspatchlevel = 1;
/* handle special suffixes */
if (isalpha(pos[1])) {
int i;
for (i = 0; stage[i].name; i++) {
if (strncasecmp(pos, stage[i].name, stage[i].namelen) == 0
&& !isalpha(pos[stage[i].namelen])) {
if (hasstage) {
/* stage to value */
component->a = stage[i].value;
pos += stage[i].namelen;
} else {
/* insert dot */
component->a = 0;
haspatchlevel = 0;
}
c = 0;
break;
}
}
}
/* unhandled above */
if (c) {
/* use the first letter and skip following */
component->a = c - 'a' + 1;
do {
++pos;
} while (isalpha(*pos));
}
} else {
component->a = 0;
haspatchlevel = 0;
}
if (haspatchlevel) {
/* handle patch number */
if (isdigit(*pos)) {
char *endptr;
#ifdef __LONG_LONG_SUPPORTED
component->pl = strtoll(pos, &endptr, 10);
#else
component->pl = strtol(pos, &endptr, 10);
#endif
/* should we test for errno == ERANGE? */
pos = endptr;
} else {
component->pl = -1;
}
} else {
component->pl = 0;
}
/* skip trailing separators */
while (*pos && !isdigit(*pos) && !isalpha(*pos) && *pos != '+' && *pos != '*') {
pos++;
}
return pos;
}
/*
* version_cmp(pkg1, pkg2) returns -1, 0 or 1 depending on if the version
* components of pkg1 is less than, equal to or greater than pkg2. No
* comparison of the basenames is done.
*
* The port version is defined by:
* ${PORTVERSION}[_${PORTREVISION}][,${PORTEPOCH}]
* ${PORTEPOCH} supersedes ${PORTVERSION} supersedes ${PORTREVISION}.
* See the commit log for revision 1.349 of ports/Mk/bsd.port.mk
* for more information.
*
* The epoch and revision are defined to be a single number, while the rest
* of the version should conform to the porting guidelines. It can contain
* multiple components, separated by a period, including letters.
*
* The tests allow for significantly more latitude in the version numbers
* than is allowed in the guidelines. No point in enforcing them here.
* That's what portlint is for.
*
* Jeremy D. Lea.
* reimplemented by Oliver Eikemeier
*/
int
version_cmp(const char *pkg1, const char *pkg2)
{
const char *v1, *v2, *ve1, *ve2;
unsigned long e1, e2, r1, r2;
int result = 0;
v1 = split_version(pkg1, &ve1, &e1, &r1);
v2 = split_version(pkg2, &ve2, &e2, &r2);
/* Check epoch, port version, and port revision, in that order. */
if (e1 != e2) {
result = (e1 < e2 ? -1 : 1);
}
/* Shortcut check for equality before invoking the parsing routines. */
if (result == 0 && (ve1 - v1 != ve2 - v2 || strncasecmp(v1, v2, ve1 - v1) != 0)) {
/* Loop over different components (the parts separated by dots).
* If any component differs, we have the basis for an inequality. */
while(result == 0 && (v1 < ve1 || v2 < ve2)) {
int block_v1 = 0;
int block_v2 = 0;
version_component vc1 = {0, 0, 0};
version_component vc2 = {0, 0, 0};
if (v1 < ve1 && *v1 != '+') {
v1 = get_component(v1, &vc1);
} else {
block_v1 = 1;
}
if (v2 < ve2 && *v2 != '+') {
v2 = get_component(v2, &vc2);
} else {
block_v2 = 1;
}
if (block_v1 && block_v2) {
if (v1 < ve1)
v1++;
if (v2 < ve2)
v2++;
} else if (vc1.n != vc2.n) {
result = (vc1.n < vc2.n ? -1 : 1);
} else if (vc1.a != vc2.a) {
result = (vc1.a < vc2.a ? -1 : 1);
} else if (vc1.pl != vc2.pl) {
result = (vc1.pl < vc2.pl ? -1 : 1);
}
}
}
/* Compare FreeBSD revision numbers. */
if (result == 0 && r1 != r2) {
result = (r1 < r2 ? -1 : 1);
}
return result;
}