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/* libguestfs
* Copyright (C) 2016 Red Hat Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* This file provides simple version number management.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <libintl.h>
#include "ignore-value.h"
#include "xstrtol.h"
#include "guestfs.h"
#include "guestfs-internal.h"
COMPILE_REGEXP (re_major_minor, "(\\d+)\\.(\\d+)", 0)
static int version_from_x_y_or_x (guestfs_h *g, struct version *v, const char *str, const pcre *re, bool allow_only_x);
void
guestfs_int_version_from_libvirt (struct version *v, int vernum)
{
v->v_major = vernum / 1000000UL;
v->v_minor = vernum / 1000UL % 1000UL;
v->v_micro = vernum % 1000UL;
}
void
guestfs_int_version_from_values (struct version *v, int maj, int min, int mic)
{
v->v_major = maj;
v->v_minor = min;
v->v_micro = mic;
}
/**
* Parses a version from a string, looking for a C<X.Y> pattern.
*
* Returns C<-1> on failure (like failed integer parsing), C<0> on missing
* match, and C<1> on match and successful parsing. C<v> is changed only
* on successful match.
*/
int
guestfs_int_version_from_x_y (guestfs_h *g, struct version *v, const char *str)
{
return version_from_x_y_or_x (g, v, str, re_major_minor, false);
}
/**
* Parses a version from a string, using the specified C<re> as regular
* expression which I<must> provide (at least) two matches.
*
* Returns C<-1> on failure (like failed integer parsing), C<0> on missing
* match, and C<1> on match and successful parsing. C<v> is changed only
* on successful match.
*/
int
guestfs_int_version_from_x_y_re (guestfs_h *g, struct version *v,
const char *str, const pcre *re)
{
return version_from_x_y_or_x (g, v, str, re, false);
}
/**
* Parses a version from a string, either looking for a C<X.Y> pattern or
* considering it as whole integer.
*
* Returns C<-1> on failure (like failed integer parsing), C<0> on missing
* match, and C<1> on match and successful parsing. C<v> is changed only
* on successful match.
*/
int
guestfs_int_version_from_x_y_or_x (guestfs_h *g, struct version *v,
const char *str)
{
return version_from_x_y_or_x (g, v, str, re_major_minor, true);
}
bool
guestfs_int_version_ge (const struct version *v, int maj, int min, int mic)
{
return (v->v_major > maj) ||
((v->v_major == maj) &&
((v->v_minor > min) ||
((v->v_minor == min) &&
(v->v_micro >= mic))));
}
bool
guestfs_int_version_cmp_ge (const struct version *a, const struct version *b)
{
return guestfs_int_version_ge (a, b->v_major, b->v_minor, b->v_micro);
}
static int
version_from_x_y_or_x (guestfs_h *g, struct version *v, const char *str,
const pcre *re, bool allow_only_x)
{
CLEANUP_FREE char *major = NULL;
CLEANUP_FREE char *minor = NULL;
if (match2 (g, str, re, &major, &minor)) {
int major_version, minor_version;
major_version = guestfs_int_parse_unsigned_int (g, major);
if (major_version == -1)
return -1;
minor_version = guestfs_int_parse_unsigned_int (g, minor);
if (minor_version == -1)
return -1;
v->v_major = major_version;
v->v_minor = minor_version;
v->v_micro = 0;
return 1;
} else if (allow_only_x) {
const int major_version = guestfs_int_parse_unsigned_int (g, str);
if (major_version == -1)
return -1;
v->v_major = major_version;
v->v_minor = 0;
v->v_micro = 0;
return 1;
}
return 0;
}
/**
* Parse small, unsigned ints, as used in version numbers.
*
* This will fail with an error if trailing characters are found after
* the integer.
*
* Returns E<ge> C<0> on success, or C<-1> on failure.
*/
int
guestfs_int_parse_unsigned_int (guestfs_h *g, const char *str)
{
long ret;
const int r = xstrtol (str, NULL, 10, &ret, "");
if (r != LONGINT_OK) {
error (g, _("could not parse integer in version number: %s"), str);
return -1;
}
return ret;
}
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