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Never overwrite a QemuOpt 

Rather than overwriting a QemuOpt, just add a new one to the tail and
always do a reverse search for parameters to preserve the same
behaviour. We use this order so that foreach() iterates over the opts
in their original order.

This will allow us handle options where multiple values for the same
parameter is allowed - e.g. -net user,hostfwd=

Signed-off-by: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Mark McLoughlin 2009-10-06 12:17:04 +01:00 committed by Anthony Liguori
parent 5dc519ef92
commit dc9ca4ba27
1 changed files with 24 additions and 29 deletions
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53
qemu-option.c
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@ -483,7 +483,7 @@ struct QemuOpt {
struct QemuOpts {
const char *id;
QemuOptsList *list;
QTAILQ_HEAD(, QemuOpt) head;
QTAILQ_HEAD(QemuOptHead, QemuOpt) head;
QTAILQ_ENTRY(QemuOpts) next;
};
@ -491,7 +491,7 @@ static QemuOpt *qemu_opt_find(QemuOpts *opts, const char *name)
{
QemuOpt *opt;
QTAILQ_FOREACH(opt, &opts->head, next) {
QTAILQ_FOREACH_REVERSE(opt, &opts->head, QemuOptHead, next) {
if (strcmp(opt->name, name) != 0)
continue;
return opt;
@ -565,36 +565,31 @@ static void qemu_opt_del(QemuOpt *opt)
int qemu_opt_set(QemuOpts *opts, const char *name, const char *value)
{
QemuOpt *opt;
QemuOptDesc *desc = opts->list->desc;
int i;
opt = qemu_opt_find(opts, name);
if (!opt) {
QemuOptDesc *desc = opts->list->desc;
int i;
for (i = 0; desc[i].name != NULL; i++) {
if (strcmp(desc[i].name, name) == 0) {
break;
}
}
if (desc[i].name == NULL) {
if (i == 0) {
/* empty list -> allow any */;
} else {
fprintf(stderr, "option \"%s\" is not valid for %s\n",
name, opts->list->name);
return -1;
}
}
opt = qemu_mallocz(sizeof(*opt));
opt->name = qemu_strdup(name);
opt->opts = opts;
QTAILQ_INSERT_TAIL(&opts->head, opt, next);
if (desc[i].name != NULL) {
opt->desc = desc+i;
for (i = 0; desc[i].name != NULL; i++) {
if (strcmp(desc[i].name, name) == 0) {
break;
}
}
qemu_free((/* !const */ char*)opt->str);
opt->str = NULL;
if (desc[i].name == NULL) {
if (i == 0) {
/* empty list -> allow any */;
} else {
fprintf(stderr, "option \"%s\" is not valid for %s\n",
name, opts->list->name);
return -1;
}
}
opt = qemu_mallocz(sizeof(*opt));
opt->name = qemu_strdup(name);
opt->opts = opts;
QTAILQ_INSERT_TAIL(&opts->head, opt, next);
if (desc[i].name != NULL) {
opt->desc = desc+i;
}
if (value) {
opt->str = qemu_strdup(value);
}