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/*
* The PCI Library -- Parameters
*
* Copyright (c) 2008--2023 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL v2+.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "internal.h"
char *
pci_get_param(struct pci_access *acc, char *param)
{
struct pci_param *p;
for (p=acc->params; p; p=p->next)
if (!strcmp(p->param, param))
return p->value;
return NULL;
}
struct pci_param *
pci_define_param(struct pci_access *acc, char *param, char *value, char *help)
{
struct pci_param *p, **pp;
for (pp=&acc->params; p = *pp; pp=&p->next)
{
int cmp = strcmp(p->param, param);
if (!cmp)
{
if (strcmp(p->value, value) || strcmp(p->help, help))
acc->error("Parameter %s re-defined differently", param);
return p;
}
if (cmp > 0)
break;
}
p = pci_malloc(acc, sizeof(*p));
p->next = *pp;
*pp = p;
p->param = param;
p->value = value;
p->value_malloced = 0;
p->help = help;
return p;
}
int
pci_set_param_internal(struct pci_access *acc, char *param, char *value, int copy)
{
struct pci_param *p;
for (p=acc->params; p; p=p->next)
if (!strcmp(p->param, param))
{
if (p->value_malloced)
pci_mfree(p->value);
p->value_malloced = copy;
if (copy)
p->value = pci_strdup(acc, value);
else
p->value = value;
return 0;
}
return -1;
}
int
pci_set_param(struct pci_access *acc, char *param, char *value)
{
return pci_set_param_internal(acc, param, value, 1);
}
void
pci_free_params(struct pci_access *acc)
{
struct pci_param *p;
while (p = acc->params)
{
acc->params = p->next;
if (p->value_malloced)
pci_mfree(p->value);
pci_mfree(p);
}
}
struct pci_param *
pci_walk_params(struct pci_access *acc, struct pci_param *prev)
{
/* So far, the params form a simple linked list, but this can change in the future */
if (!prev)
return acc->params;
else
return prev->next;
}
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