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cryb-to/lib/cpe/cpe.c

156 lines
4 KiB
C

/*-
* Copyright (c) 2014 Dag-Erling Smørgrav
* All rights reserved.
*
* 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.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "cryb/impl.h"
#include <stdlib.h>
#include <wchar.h>
#include <cryb/cpe.h>
/*
* Free all memory allocated to a cpe structure.
*/
void
cpe_destroy(struct cpe_name *cpe)
{
if (cpe == NULL)
return;
for (int i = 0; i < cpe->nattr; ++i)
free(cpe->attr[i]);
free(cpe);
}
/*
* Copy one or more attributes from a source cpe structure to a
* destination cpe structure. If an attribute in the source is NULL, the
* corresponding attribute in the destination will be an empty string.
*/
static int
cpe_copy_attr(struct cpe_name *dst, const struct cpe_name *src, int base, int nattr)
{
if (base < 0 || nattr < 0 || base + nattr > src->nattr ||
base + nattr > dst->nattr)
return (-1);
if (nattr == 0)
nattr = src->nattr - base;
for (int i = base; i < base + nattr; ++i) {
if (src->attr[i] != NULL)
dst->attr[i] = wcsdup(src->attr[i]);
else
dst->attr[i] = wcsdup(L"");
if (dst->attr[i] == NULL)
return (-1);
}
return (nattr);
}
/*
* Duplicate a cpe structure. Any attributes that are NULL in the source
* will be empty strings in the destination.
*/
struct cpe_name *
cpe_clone(const struct cpe_name *cpe)
{
struct cpe_name *ncpe;
ncpe = calloc(1, sizeof *ncpe +
cpe->nattr * sizeof *ncpe->attr);
if (ncpe == NULL)
return (NULL);
if (cpe_copy_attr(ncpe, cpe, 0, 0) < 0) {
cpe_destroy(ncpe);
return (NULL);
}
return (ncpe);
}
/*
* Allocate a new cpe structure.
*/
struct cpe_name *
cpe_new(void)
{
struct cpe_name *ncpe;
if ((ncpe = calloc(1, sizeof *ncpe)) == NULL)
return (NULL);
ncpe->ver = cpe23_ver;
ncpe->nattr = cpe23_nattr;
return (ncpe);
}
/*
* Upgrade a cpe 2.2 structure to the latest supported version.
*/
struct cpe_name *
cpe_upgrade22(const struct cpe_name *cpe)
{
struct cpe_name *ncpe;
if ((ncpe = cpe_new()) == NULL)
return (NULL);
/* copy existing attributes */
if (cpe_copy_attr(ncpe, cpe, 0, cpe22_nattr) < 0) {
cpe_destroy(ncpe);
return (NULL);
}
/* extended attributes? */
if (ncpe->attr[cpe22_edition][0] == L'~') {
/*
* XXX pseudo-code:
*
* - Split into fields (return an error if there are more
* than four)
* - Assign these to sw_edition, target_sw, target_hw and
* other, in that order.
*/
}
return (ncpe);
}
/*
* Upgrade a cpe structure to the latest supported version.
*/
struct cpe_name *
cpe_upgrade(const struct cpe_name *cpe)
{
switch (cpe->ver) {
case cpe22_ver:
/* already latest */
return (cpe_clone(cpe));
case cpe23_ver:
return (cpe_upgrade22(cpe));
default:
return (NULL);
}
}