qemu-e2k/qapi/opts-visitor.c

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qapi: introduce OptsVisitor This visitor supports parsing -option [type=]discriminator[,optarg1=val1][,optarg2=val2][,...] style QemuOpts objects into "native" C structures. After defining the type tree in the qapi schema (see below), a root type traversal with this visitor linked to the underlying QemuOpts object will build the "native" C representation of the option. The type tree in the schema, corresponding to an option with a discriminator, must have the following structure: struct scalar member for non-discriminated optarg 1 [*] list for repeating non-discriminated optarg 2 [*] wrapper struct single scalar member union struct for discriminator case 1 scalar member for optarg 3 [*] list for repeating optarg 4 [*] wrapper struct single scalar member scalar member for optarg 5 [*] struct for discriminator case 2 ... The "type" optarg name is fixed for the discriminator role. Its schema representation is "union of structures", and each discriminator value must correspond to a member name in the union. If the option takes no "type" descriminator, then the type subtree rooted at the union must be absent from the schema (including the union itself). Optarg values can be of scalar types str / bool / integers / size. Members marked with [*] may be defined as optional in the schema, describing an optional optarg. Repeating an optarg is supported; its schema representation must be "list of structure with single mandatory scalar member". If an optarg is not described as repeating in the schema (ie. it is defined as a scalar field instead of a list), its last occurrence will take effect. Ordering between differently named optargs is not preserved. A mandatory list (or an optional one which is reported to be available), corresponding to a repeating optarg, has at least one element after successful parsing. v1->v2: - Update opts_type_size() prototype to uint64_t. - Add opts_type_uint64() for options needing the full uint64_t range. (Internals could be extracted to "cutils.c".) - Allow negative values in opts_type_int(). - Rebase to nested Makefiles. v2->v3: - Factor opts_visitor_insert() out of opts_start_struct() and call it separately for opts_root->id if there's any. - Don't require non-negative values in opts_type_int()'s error message. - g_malloc0() may return NULL for zero-sized requests. Support empty structures by requesting 1 byte for them instead. Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-07-17 16:17:09 +02:00
/*
* Options Visitor
*
* Copyright Red Hat, Inc. 2012, 2013
qapi: introduce OptsVisitor This visitor supports parsing -option [type=]discriminator[,optarg1=val1][,optarg2=val2][,...] style QemuOpts objects into "native" C structures. After defining the type tree in the qapi schema (see below), a root type traversal with this visitor linked to the underlying QemuOpts object will build the "native" C representation of the option. The type tree in the schema, corresponding to an option with a discriminator, must have the following structure: struct scalar member for non-discriminated optarg 1 [*] list for repeating non-discriminated optarg 2 [*] wrapper struct single scalar member union struct for discriminator case 1 scalar member for optarg 3 [*] list for repeating optarg 4 [*] wrapper struct single scalar member scalar member for optarg 5 [*] struct for discriminator case 2 ... The "type" optarg name is fixed for the discriminator role. Its schema representation is "union of structures", and each discriminator value must correspond to a member name in the union. If the option takes no "type" descriminator, then the type subtree rooted at the union must be absent from the schema (including the union itself). Optarg values can be of scalar types str / bool / integers / size. Members marked with [*] may be defined as optional in the schema, describing an optional optarg. Repeating an optarg is supported; its schema representation must be "list of structure with single mandatory scalar member". If an optarg is not described as repeating in the schema (ie. it is defined as a scalar field instead of a list), its last occurrence will take effect. Ordering between differently named optargs is not preserved. A mandatory list (or an optional one which is reported to be available), corresponding to a repeating optarg, has at least one element after successful parsing. v1->v2: - Update opts_type_size() prototype to uint64_t. - Add opts_type_uint64() for options needing the full uint64_t range. (Internals could be extracted to "cutils.c".) - Allow negative values in opts_type_int(). - Rebase to nested Makefiles. v2->v3: - Factor opts_visitor_insert() out of opts_start_struct() and call it separately for opts_root->id if there's any. - Don't require non-negative values in opts_type_int()'s error message. - g_malloc0() may return NULL for zero-sized requests. Support empty structures by requesting 1 byte for them instead. Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-07-17 16:17:09 +02:00
*
* Author: Laszlo Ersek <lersek@redhat.com>
*
* This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
* See the COPYING.LIB file in the top-level directory.
*
*/
#include "qemu-common.h"
#include "qapi/qmp/qerror.h"
#include "qapi/opts-visitor.h"
#include "qemu/queue.h"
#include "qemu/option_int.h"
#include "qapi/visitor-impl.h"
qapi: introduce OptsVisitor This visitor supports parsing -option [type=]discriminator[,optarg1=val1][,optarg2=val2][,...] style QemuOpts objects into "native" C structures. After defining the type tree in the qapi schema (see below), a root type traversal with this visitor linked to the underlying QemuOpts object will build the "native" C representation of the option. The type tree in the schema, corresponding to an option with a discriminator, must have the following structure: struct scalar member for non-discriminated optarg 1 [*] list for repeating non-discriminated optarg 2 [*] wrapper struct single scalar member union struct for discriminator case 1 scalar member for optarg 3 [*] list for repeating optarg 4 [*] wrapper struct single scalar member scalar member for optarg 5 [*] struct for discriminator case 2 ... The "type" optarg name is fixed for the discriminator role. Its schema representation is "union of structures", and each discriminator value must correspond to a member name in the union. If the option takes no "type" descriminator, then the type subtree rooted at the union must be absent from the schema (including the union itself). Optarg values can be of scalar types str / bool / integers / size. Members marked with [*] may be defined as optional in the schema, describing an optional optarg. Repeating an optarg is supported; its schema representation must be "list of structure with single mandatory scalar member". If an optarg is not described as repeating in the schema (ie. it is defined as a scalar field instead of a list), its last occurrence will take effect. Ordering between differently named optargs is not preserved. A mandatory list (or an optional one which is reported to be available), corresponding to a repeating optarg, has at least one element after successful parsing. v1->v2: - Update opts_type_size() prototype to uint64_t. - Add opts_type_uint64() for options needing the full uint64_t range. (Internals could be extracted to "cutils.c".) - Allow negative values in opts_type_int(). - Rebase to nested Makefiles. v2->v3: - Factor opts_visitor_insert() out of opts_start_struct() and call it separately for opts_root->id if there's any. - Don't require non-negative values in opts_type_int()'s error message. - g_malloc0() may return NULL for zero-sized requests. Support empty structures by requesting 1 byte for them instead. Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-07-17 16:17:09 +02:00
enum ListMode
{
LM_NONE, /* not traversing a list of repeated options */
LM_STARTED, /* opts_start_list() succeeded */
LM_IN_PROGRESS, /* opts_next_list() has been called.
*
* Generating the next list link will consume the most
* recently parsed QemuOpt instance of the repeated
* option.
*
* Parsing a value into the list link will examine the
* next QemuOpt instance of the repeated option, and
* possibly enter LM_SIGNED_INTERVAL or
* LM_UNSIGNED_INTERVAL.
*/
LM_SIGNED_INTERVAL, /* opts_next_list() has been called.
*
* Generating the next list link will consume the most
* recently stored element from the signed interval,
* parsed from the most recent QemuOpt instance of the
* repeated option. This may consume QemuOpt itself
* and return to LM_IN_PROGRESS.
*
* Parsing a value into the list link will store the
* next element of the signed interval.
*/
LM_UNSIGNED_INTERVAL /* Same as above, only for an unsigned interval. */
};
typedef enum ListMode ListMode;
qapi: introduce OptsVisitor This visitor supports parsing -option [type=]discriminator[,optarg1=val1][,optarg2=val2][,...] style QemuOpts objects into "native" C structures. After defining the type tree in the qapi schema (see below), a root type traversal with this visitor linked to the underlying QemuOpts object will build the "native" C representation of the option. The type tree in the schema, corresponding to an option with a discriminator, must have the following structure: struct scalar member for non-discriminated optarg 1 [*] list for repeating non-discriminated optarg 2 [*] wrapper struct single scalar member union struct for discriminator case 1 scalar member for optarg 3 [*] list for repeating optarg 4 [*] wrapper struct single scalar member scalar member for optarg 5 [*] struct for discriminator case 2 ... The "type" optarg name is fixed for the discriminator role. Its schema representation is "union of structures", and each discriminator value must correspond to a member name in the union. If the option takes no "type" descriminator, then the type subtree rooted at the union must be absent from the schema (including the union itself). Optarg values can be of scalar types str / bool / integers / size. Members marked with [*] may be defined as optional in the schema, describing an optional optarg. Repeating an optarg is supported; its schema representation must be "list of structure with single mandatory scalar member". If an optarg is not described as repeating in the schema (ie. it is defined as a scalar field instead of a list), its last occurrence will take effect. Ordering between differently named optargs is not preserved. A mandatory list (or an optional one which is reported to be available), corresponding to a repeating optarg, has at least one element after successful parsing. v1->v2: - Update opts_type_size() prototype to uint64_t. - Add opts_type_uint64() for options needing the full uint64_t range. (Internals could be extracted to "cutils.c".) - Allow negative values in opts_type_int(). - Rebase to nested Makefiles. v2->v3: - Factor opts_visitor_insert() out of opts_start_struct() and call it separately for opts_root->id if there's any. - Don't require non-negative values in opts_type_int()'s error message. - g_malloc0() may return NULL for zero-sized requests. Support empty structures by requesting 1 byte for them instead. Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-07-17 16:17:09 +02:00
struct OptsVisitor
{
Visitor visitor;
/* Ownership remains with opts_visitor_new()'s caller. */
const QemuOpts *opts_root;
unsigned depth;
/* Non-null iff depth is positive. Each key is a QemuOpt name. Each value
* is a non-empty GQueue, enumerating all QemuOpt occurrences with that
* name. */
GHashTable *unprocessed_opts;
/* The list currently being traversed with opts_start_list() /
* opts_next_list(). The list must have a struct element type in the
* schema, with a single mandatory scalar member. */
ListMode list_mode;
qapi: introduce OptsVisitor This visitor supports parsing -option [type=]discriminator[,optarg1=val1][,optarg2=val2][,...] style QemuOpts objects into "native" C structures. After defining the type tree in the qapi schema (see below), a root type traversal with this visitor linked to the underlying QemuOpts object will build the "native" C representation of the option. The type tree in the schema, corresponding to an option with a discriminator, must have the following structure: struct scalar member for non-discriminated optarg 1 [*] list for repeating non-discriminated optarg 2 [*] wrapper struct single scalar member union struct for discriminator case 1 scalar member for optarg 3 [*] list for repeating optarg 4 [*] wrapper struct single scalar member scalar member for optarg 5 [*] struct for discriminator case 2 ... The "type" optarg name is fixed for the discriminator role. Its schema representation is "union of structures", and each discriminator value must correspond to a member name in the union. If the option takes no "type" descriminator, then the type subtree rooted at the union must be absent from the schema (including the union itself). Optarg values can be of scalar types str / bool / integers / size. Members marked with [*] may be defined as optional in the schema, describing an optional optarg. Repeating an optarg is supported; its schema representation must be "list of structure with single mandatory scalar member". If an optarg is not described as repeating in the schema (ie. it is defined as a scalar field instead of a list), its last occurrence will take effect. Ordering between differently named optargs is not preserved. A mandatory list (or an optional one which is reported to be available), corresponding to a repeating optarg, has at least one element after successful parsing. v1->v2: - Update opts_type_size() prototype to uint64_t. - Add opts_type_uint64() for options needing the full uint64_t range. (Internals could be extracted to "cutils.c".) - Allow negative values in opts_type_int(). - Rebase to nested Makefiles. v2->v3: - Factor opts_visitor_insert() out of opts_start_struct() and call it separately for opts_root->id if there's any. - Don't require non-negative values in opts_type_int()'s error message. - g_malloc0() may return NULL for zero-sized requests. Support empty structures by requesting 1 byte for them instead. Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-07-17 16:17:09 +02:00
GQueue *repeated_opts;
/* When parsing a list of repeating options as integers, values of the form
* "a-b", representing a closed interval, are allowed. Elements in the
* range are generated individually.
*/
union {
int64_t s;
uint64_t u;
} range_next, range_limit;
qapi: introduce OptsVisitor This visitor supports parsing -option [type=]discriminator[,optarg1=val1][,optarg2=val2][,...] style QemuOpts objects into "native" C structures. After defining the type tree in the qapi schema (see below), a root type traversal with this visitor linked to the underlying QemuOpts object will build the "native" C representation of the option. The type tree in the schema, corresponding to an option with a discriminator, must have the following structure: struct scalar member for non-discriminated optarg 1 [*] list for repeating non-discriminated optarg 2 [*] wrapper struct single scalar member union struct for discriminator case 1 scalar member for optarg 3 [*] list for repeating optarg 4 [*] wrapper struct single scalar member scalar member for optarg 5 [*] struct for discriminator case 2 ... The "type" optarg name is fixed for the discriminator role. Its schema representation is "union of structures", and each discriminator value must correspond to a member name in the union. If the option takes no "type" descriminator, then the type subtree rooted at the union must be absent from the schema (including the union itself). Optarg values can be of scalar types str / bool / integers / size. Members marked with [*] may be defined as optional in the schema, describing an optional optarg. Repeating an optarg is supported; its schema representation must be "list of structure with single mandatory scalar member". If an optarg is not described as repeating in the schema (ie. it is defined as a scalar field instead of a list), its last occurrence will take effect. Ordering between differently named optargs is not preserved. A mandatory list (or an optional one which is reported to be available), corresponding to a repeating optarg, has at least one element after successful parsing. v1->v2: - Update opts_type_size() prototype to uint64_t. - Add opts_type_uint64() for options needing the full uint64_t range. (Internals could be extracted to "cutils.c".) - Allow negative values in opts_type_int(). - Rebase to nested Makefiles. v2->v3: - Factor opts_visitor_insert() out of opts_start_struct() and call it separately for opts_root->id if there's any. - Don't require non-negative values in opts_type_int()'s error message. - g_malloc0() may return NULL for zero-sized requests. Support empty structures by requesting 1 byte for them instead. Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-07-17 16:17:09 +02:00
/* If "opts_root->id" is set, reinstantiate it as a fake QemuOpt for
* uniformity. Only its "name" and "str" fields are set. "fake_id_opt" does
* not survive or escape the OptsVisitor object.
*/
QemuOpt *fake_id_opt;
};
static void
destroy_list(gpointer list)
{
g_queue_free(list);
}
static void
opts_visitor_insert(GHashTable *unprocessed_opts, const QemuOpt *opt)
{
GQueue *list;
list = g_hash_table_lookup(unprocessed_opts, opt->name);
if (list == NULL) {
list = g_queue_new();
/* GHashTable will never try to free the keys -- we supply NULL as
* "key_destroy_func" in opts_start_struct(). Thus cast away key
* const-ness in order to suppress gcc's warning.
*/
g_hash_table_insert(unprocessed_opts, (gpointer)opt->name, list);
}
/* Similarly, destroy_list() doesn't call g_queue_free_full(). */
g_queue_push_tail(list, (gpointer)opt);
}
static void
opts_start_struct(Visitor *v, void **obj, const char *kind,
const char *name, size_t size, Error **errp)
{
OptsVisitor *ov = DO_UPCAST(OptsVisitor, visitor, v);
const QemuOpt *opt;
if (obj) {
*obj = g_malloc0(size > 0 ? size : 1);
}
qapi: introduce OptsVisitor This visitor supports parsing -option [type=]discriminator[,optarg1=val1][,optarg2=val2][,...] style QemuOpts objects into "native" C structures. After defining the type tree in the qapi schema (see below), a root type traversal with this visitor linked to the underlying QemuOpts object will build the "native" C representation of the option. The type tree in the schema, corresponding to an option with a discriminator, must have the following structure: struct scalar member for non-discriminated optarg 1 [*] list for repeating non-discriminated optarg 2 [*] wrapper struct single scalar member union struct for discriminator case 1 scalar member for optarg 3 [*] list for repeating optarg 4 [*] wrapper struct single scalar member scalar member for optarg 5 [*] struct for discriminator case 2 ... The "type" optarg name is fixed for the discriminator role. Its schema representation is "union of structures", and each discriminator value must correspond to a member name in the union. If the option takes no "type" descriminator, then the type subtree rooted at the union must be absent from the schema (including the union itself). Optarg values can be of scalar types str / bool / integers / size. Members marked with [*] may be defined as optional in the schema, describing an optional optarg. Repeating an optarg is supported; its schema representation must be "list of structure with single mandatory scalar member". If an optarg is not described as repeating in the schema (ie. it is defined as a scalar field instead of a list), its last occurrence will take effect. Ordering between differently named optargs is not preserved. A mandatory list (or an optional one which is reported to be available), corresponding to a repeating optarg, has at least one element after successful parsing. v1->v2: - Update opts_type_size() prototype to uint64_t. - Add opts_type_uint64() for options needing the full uint64_t range. (Internals could be extracted to "cutils.c".) - Allow negative values in opts_type_int(). - Rebase to nested Makefiles. v2->v3: - Factor opts_visitor_insert() out of opts_start_struct() and call it separately for opts_root->id if there's any. - Don't require non-negative values in opts_type_int()'s error message. - g_malloc0() may return NULL for zero-sized requests. Support empty structures by requesting 1 byte for them instead. Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-07-17 16:17:09 +02:00
if (ov->depth++ > 0) {
return;
}
ov->unprocessed_opts = g_hash_table_new_full(&g_str_hash, &g_str_equal,
NULL, &destroy_list);
QTAILQ_FOREACH(opt, &ov->opts_root->head, next) {
/* ensured by qemu-option.c::opts_do_parse() */
assert(strcmp(opt->name, "id") != 0);
opts_visitor_insert(ov->unprocessed_opts, opt);
}
if (ov->opts_root->id != NULL) {
ov->fake_id_opt = g_malloc0(sizeof *ov->fake_id_opt);
ov->fake_id_opt->name = "id";
ov->fake_id_opt->str = ov->opts_root->id;
opts_visitor_insert(ov->unprocessed_opts, ov->fake_id_opt);
}
}
static gboolean
ghr_true(gpointer ign_key, gpointer ign_value, gpointer ign_user_data)
{
return TRUE;
}
static void
opts_end_struct(Visitor *v, Error **errp)
{
OptsVisitor *ov = DO_UPCAST(OptsVisitor, visitor, v);
GQueue *any;
if (--ov->depth > 0) {
return;
}
/* we should have processed all (distinct) QemuOpt instances */
any = g_hash_table_find(ov->unprocessed_opts, &ghr_true, NULL);
if (any) {
const QemuOpt *first;
first = g_queue_peek_head(any);
error_set(errp, QERR_INVALID_PARAMETER, first->name);
}
g_hash_table_destroy(ov->unprocessed_opts);
ov->unprocessed_opts = NULL;
g_free(ov->fake_id_opt);
ov->fake_id_opt = NULL;
}
static GQueue *
lookup_distinct(const OptsVisitor *ov, const char *name, Error **errp)
{
GQueue *list;
list = g_hash_table_lookup(ov->unprocessed_opts, name);
if (!list) {
error_set(errp, QERR_MISSING_PARAMETER, name);
}
return list;
}
static void
opts_start_list(Visitor *v, const char *name, Error **errp)
{
OptsVisitor *ov = DO_UPCAST(OptsVisitor, visitor, v);
/* we can't traverse a list in a list */
assert(ov->list_mode == LM_NONE);
qapi: introduce OptsVisitor This visitor supports parsing -option [type=]discriminator[,optarg1=val1][,optarg2=val2][,...] style QemuOpts objects into "native" C structures. After defining the type tree in the qapi schema (see below), a root type traversal with this visitor linked to the underlying QemuOpts object will build the "native" C representation of the option. The type tree in the schema, corresponding to an option with a discriminator, must have the following structure: struct scalar member for non-discriminated optarg 1 [*] list for repeating non-discriminated optarg 2 [*] wrapper struct single scalar member union struct for discriminator case 1 scalar member for optarg 3 [*] list for repeating optarg 4 [*] wrapper struct single scalar member scalar member for optarg 5 [*] struct for discriminator case 2 ... The "type" optarg name is fixed for the discriminator role. Its schema representation is "union of structures", and each discriminator value must correspond to a member name in the union. If the option takes no "type" descriminator, then the type subtree rooted at the union must be absent from the schema (including the union itself). Optarg values can be of scalar types str / bool / integers / size. Members marked with [*] may be defined as optional in the schema, describing an optional optarg. Repeating an optarg is supported; its schema representation must be "list of structure with single mandatory scalar member". If an optarg is not described as repeating in the schema (ie. it is defined as a scalar field instead of a list), its last occurrence will take effect. Ordering between differently named optargs is not preserved. A mandatory list (or an optional one which is reported to be available), corresponding to a repeating optarg, has at least one element after successful parsing. v1->v2: - Update opts_type_size() prototype to uint64_t. - Add opts_type_uint64() for options needing the full uint64_t range. (Internals could be extracted to "cutils.c".) - Allow negative values in opts_type_int(). - Rebase to nested Makefiles. v2->v3: - Factor opts_visitor_insert() out of opts_start_struct() and call it separately for opts_root->id if there's any. - Don't require non-negative values in opts_type_int()'s error message. - g_malloc0() may return NULL for zero-sized requests. Support empty structures by requesting 1 byte for them instead. Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-07-17 16:17:09 +02:00
ov->repeated_opts = lookup_distinct(ov, name, errp);
if (ov->repeated_opts != NULL) {
ov->list_mode = LM_STARTED;
}
qapi: introduce OptsVisitor This visitor supports parsing -option [type=]discriminator[,optarg1=val1][,optarg2=val2][,...] style QemuOpts objects into "native" C structures. After defining the type tree in the qapi schema (see below), a root type traversal with this visitor linked to the underlying QemuOpts object will build the "native" C representation of the option. The type tree in the schema, corresponding to an option with a discriminator, must have the following structure: struct scalar member for non-discriminated optarg 1 [*] list for repeating non-discriminated optarg 2 [*] wrapper struct single scalar member union struct for discriminator case 1 scalar member for optarg 3 [*] list for repeating optarg 4 [*] wrapper struct single scalar member scalar member for optarg 5 [*] struct for discriminator case 2 ... The "type" optarg name is fixed for the discriminator role. Its schema representation is "union of structures", and each discriminator value must correspond to a member name in the union. If the option takes no "type" descriminator, then the type subtree rooted at the union must be absent from the schema (including the union itself). Optarg values can be of scalar types str / bool / integers / size. Members marked with [*] may be defined as optional in the schema, describing an optional optarg. Repeating an optarg is supported; its schema representation must be "list of structure with single mandatory scalar member". If an optarg is not described as repeating in the schema (ie. it is defined as a scalar field instead of a list), its last occurrence will take effect. Ordering between differently named optargs is not preserved. A mandatory list (or an optional one which is reported to be available), corresponding to a repeating optarg, has at least one element after successful parsing. v1->v2: - Update opts_type_size() prototype to uint64_t. - Add opts_type_uint64() for options needing the full uint64_t range. (Internals could be extracted to "cutils.c".) - Allow negative values in opts_type_int(). - Rebase to nested Makefiles. v2->v3: - Factor opts_visitor_insert() out of opts_start_struct() and call it separately for opts_root->id if there's any. - Don't require non-negative values in opts_type_int()'s error message. - g_malloc0() may return NULL for zero-sized requests. Support empty structures by requesting 1 byte for them instead. Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-07-17 16:17:09 +02:00
}
static GenericList *
opts_next_list(Visitor *v, GenericList **list, Error **errp)
{
OptsVisitor *ov = DO_UPCAST(OptsVisitor, visitor, v);
GenericList **link;
switch (ov->list_mode) {
case LM_STARTED:
ov->list_mode = LM_IN_PROGRESS;
qapi: introduce OptsVisitor This visitor supports parsing -option [type=]discriminator[,optarg1=val1][,optarg2=val2][,...] style QemuOpts objects into "native" C structures. After defining the type tree in the qapi schema (see below), a root type traversal with this visitor linked to the underlying QemuOpts object will build the "native" C representation of the option. The type tree in the schema, corresponding to an option with a discriminator, must have the following structure: struct scalar member for non-discriminated optarg 1 [*] list for repeating non-discriminated optarg 2 [*] wrapper struct single scalar member union struct for discriminator case 1 scalar member for optarg 3 [*] list for repeating optarg 4 [*] wrapper struct single scalar member scalar member for optarg 5 [*] struct for discriminator case 2 ... The "type" optarg name is fixed for the discriminator role. Its schema representation is "union of structures", and each discriminator value must correspond to a member name in the union. If the option takes no "type" descriminator, then the type subtree rooted at the union must be absent from the schema (including the union itself). Optarg values can be of scalar types str / bool / integers / size. Members marked with [*] may be defined as optional in the schema, describing an optional optarg. Repeating an optarg is supported; its schema representation must be "list of structure with single mandatory scalar member". If an optarg is not described as repeating in the schema (ie. it is defined as a scalar field instead of a list), its last occurrence will take effect. Ordering between differently named optargs is not preserved. A mandatory list (or an optional one which is reported to be available), corresponding to a repeating optarg, has at least one element after successful parsing. v1->v2: - Update opts_type_size() prototype to uint64_t. - Add opts_type_uint64() for options needing the full uint64_t range. (Internals could be extracted to "cutils.c".) - Allow negative values in opts_type_int(). - Rebase to nested Makefiles. v2->v3: - Factor opts_visitor_insert() out of opts_start_struct() and call it separately for opts_root->id if there's any. - Don't require non-negative values in opts_type_int()'s error message. - g_malloc0() may return NULL for zero-sized requests. Support empty structures by requesting 1 byte for them instead. Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-07-17 16:17:09 +02:00
link = list;
break;
case LM_SIGNED_INTERVAL:
case LM_UNSIGNED_INTERVAL:
link = &(*list)->next;
if (ov->list_mode == LM_SIGNED_INTERVAL) {
if (ov->range_next.s < ov->range_limit.s) {
++ov->range_next.s;
break;
}
} else if (ov->range_next.u < ov->range_limit.u) {
++ov->range_next.u;
break;
}
ov->list_mode = LM_IN_PROGRESS;
/* range has been completed, fall through in order to pop option */
case LM_IN_PROGRESS: {
qapi: introduce OptsVisitor This visitor supports parsing -option [type=]discriminator[,optarg1=val1][,optarg2=val2][,...] style QemuOpts objects into "native" C structures. After defining the type tree in the qapi schema (see below), a root type traversal with this visitor linked to the underlying QemuOpts object will build the "native" C representation of the option. The type tree in the schema, corresponding to an option with a discriminator, must have the following structure: struct scalar member for non-discriminated optarg 1 [*] list for repeating non-discriminated optarg 2 [*] wrapper struct single scalar member union struct for discriminator case 1 scalar member for optarg 3 [*] list for repeating optarg 4 [*] wrapper struct single scalar member scalar member for optarg 5 [*] struct for discriminator case 2 ... The "type" optarg name is fixed for the discriminator role. Its schema representation is "union of structures", and each discriminator value must correspond to a member name in the union. If the option takes no "type" descriminator, then the type subtree rooted at the union must be absent from the schema (including the union itself). Optarg values can be of scalar types str / bool / integers / size. Members marked with [*] may be defined as optional in the schema, describing an optional optarg. Repeating an optarg is supported; its schema representation must be "list of structure with single mandatory scalar member". If an optarg is not described as repeating in the schema (ie. it is defined as a scalar field instead of a list), its last occurrence will take effect. Ordering between differently named optargs is not preserved. A mandatory list (or an optional one which is reported to be available), corresponding to a repeating optarg, has at least one element after successful parsing. v1->v2: - Update opts_type_size() prototype to uint64_t. - Add opts_type_uint64() for options needing the full uint64_t range. (Internals could be extracted to "cutils.c".) - Allow negative values in opts_type_int(). - Rebase to nested Makefiles. v2->v3: - Factor opts_visitor_insert() out of opts_start_struct() and call it separately for opts_root->id if there's any. - Don't require non-negative values in opts_type_int()'s error message. - g_malloc0() may return NULL for zero-sized requests. Support empty structures by requesting 1 byte for them instead. Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-07-17 16:17:09 +02:00
const QemuOpt *opt;
opt = g_queue_pop_head(ov->repeated_opts);
if (g_queue_is_empty(ov->repeated_opts)) {
g_hash_table_remove(ov->unprocessed_opts, opt->name);
return NULL;
}
link = &(*list)->next;
break;
}
default:
abort();
qapi: introduce OptsVisitor This visitor supports parsing -option [type=]discriminator[,optarg1=val1][,optarg2=val2][,...] style QemuOpts objects into "native" C structures. After defining the type tree in the qapi schema (see below), a root type traversal with this visitor linked to the underlying QemuOpts object will build the "native" C representation of the option. The type tree in the schema, corresponding to an option with a discriminator, must have the following structure: struct scalar member for non-discriminated optarg 1 [*] list for repeating non-discriminated optarg 2 [*] wrapper struct single scalar member union struct for discriminator case 1 scalar member for optarg 3 [*] list for repeating optarg 4 [*] wrapper struct single scalar member scalar member for optarg 5 [*] struct for discriminator case 2 ... The "type" optarg name is fixed for the discriminator role. Its schema representation is "union of structures", and each discriminator value must correspond to a member name in the union. If the option takes no "type" descriminator, then the type subtree rooted at the union must be absent from the schema (including the union itself). Optarg values can be of scalar types str / bool / integers / size. Members marked with [*] may be defined as optional in the schema, describing an optional optarg. Repeating an optarg is supported; its schema representation must be "list of structure with single mandatory scalar member". If an optarg is not described as repeating in the schema (ie. it is defined as a scalar field instead of a list), its last occurrence will take effect. Ordering between differently named optargs is not preserved. A mandatory list (or an optional one which is reported to be available), corresponding to a repeating optarg, has at least one element after successful parsing. v1->v2: - Update opts_type_size() prototype to uint64_t. - Add opts_type_uint64() for options needing the full uint64_t range. (Internals could be extracted to "cutils.c".) - Allow negative values in opts_type_int(). - Rebase to nested Makefiles. v2->v3: - Factor opts_visitor_insert() out of opts_start_struct() and call it separately for opts_root->id if there's any. - Don't require non-negative values in opts_type_int()'s error message. - g_malloc0() may return NULL for zero-sized requests. Support empty structures by requesting 1 byte for them instead. Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-07-17 16:17:09 +02:00
}
*link = g_malloc0(sizeof **link);
return *link;
}
static void
opts_end_list(Visitor *v, Error **errp)
{
OptsVisitor *ov = DO_UPCAST(OptsVisitor, visitor, v);
assert(ov->list_mode == LM_STARTED ||
ov->list_mode == LM_IN_PROGRESS ||
ov->list_mode == LM_SIGNED_INTERVAL ||
ov->list_mode == LM_UNSIGNED_INTERVAL);
qapi: introduce OptsVisitor This visitor supports parsing -option [type=]discriminator[,optarg1=val1][,optarg2=val2][,...] style QemuOpts objects into "native" C structures. After defining the type tree in the qapi schema (see below), a root type traversal with this visitor linked to the underlying QemuOpts object will build the "native" C representation of the option. The type tree in the schema, corresponding to an option with a discriminator, must have the following structure: struct scalar member for non-discriminated optarg 1 [*] list for repeating non-discriminated optarg 2 [*] wrapper struct single scalar member union struct for discriminator case 1 scalar member for optarg 3 [*] list for repeating optarg 4 [*] wrapper struct single scalar member scalar member for optarg 5 [*] struct for discriminator case 2 ... The "type" optarg name is fixed for the discriminator role. Its schema representation is "union of structures", and each discriminator value must correspond to a member name in the union. If the option takes no "type" descriminator, then the type subtree rooted at the union must be absent from the schema (including the union itself). Optarg values can be of scalar types str / bool / integers / size. Members marked with [*] may be defined as optional in the schema, describing an optional optarg. Repeating an optarg is supported; its schema representation must be "list of structure with single mandatory scalar member". If an optarg is not described as repeating in the schema (ie. it is defined as a scalar field instead of a list), its last occurrence will take effect. Ordering between differently named optargs is not preserved. A mandatory list (or an optional one which is reported to be available), corresponding to a repeating optarg, has at least one element after successful parsing. v1->v2: - Update opts_type_size() prototype to uint64_t. - Add opts_type_uint64() for options needing the full uint64_t range. (Internals could be extracted to "cutils.c".) - Allow negative values in opts_type_int(). - Rebase to nested Makefiles. v2->v3: - Factor opts_visitor_insert() out of opts_start_struct() and call it separately for opts_root->id if there's any. - Don't require non-negative values in opts_type_int()'s error message. - g_malloc0() may return NULL for zero-sized requests. Support empty structures by requesting 1 byte for them instead. Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-07-17 16:17:09 +02:00
ov->repeated_opts = NULL;
ov->list_mode = LM_NONE;
qapi: introduce OptsVisitor This visitor supports parsing -option [type=]discriminator[,optarg1=val1][,optarg2=val2][,...] style QemuOpts objects into "native" C structures. After defining the type tree in the qapi schema (see below), a root type traversal with this visitor linked to the underlying QemuOpts object will build the "native" C representation of the option. The type tree in the schema, corresponding to an option with a discriminator, must have the following structure: struct scalar member for non-discriminated optarg 1 [*] list for repeating non-discriminated optarg 2 [*] wrapper struct single scalar member union struct for discriminator case 1 scalar member for optarg 3 [*] list for repeating optarg 4 [*] wrapper struct single scalar member scalar member for optarg 5 [*] struct for discriminator case 2 ... The "type" optarg name is fixed for the discriminator role. Its schema representation is "union of structures", and each discriminator value must correspond to a member name in the union. If the option takes no "type" descriminator, then the type subtree rooted at the union must be absent from the schema (including the union itself). Optarg values can be of scalar types str / bool / integers / size. Members marked with [*] may be defined as optional in the schema, describing an optional optarg. Repeating an optarg is supported; its schema representation must be "list of structure with single mandatory scalar member". If an optarg is not described as repeating in the schema (ie. it is defined as a scalar field instead of a list), its last occurrence will take effect. Ordering between differently named optargs is not preserved. A mandatory list (or an optional one which is reported to be available), corresponding to a repeating optarg, has at least one element after successful parsing. v1->v2: - Update opts_type_size() prototype to uint64_t. - Add opts_type_uint64() for options needing the full uint64_t range. (Internals could be extracted to "cutils.c".) - Allow negative values in opts_type_int(). - Rebase to nested Makefiles. v2->v3: - Factor opts_visitor_insert() out of opts_start_struct() and call it separately for opts_root->id if there's any. - Don't require non-negative values in opts_type_int()'s error message. - g_malloc0() may return NULL for zero-sized requests. Support empty structures by requesting 1 byte for them instead. Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-07-17 16:17:09 +02:00
}
static const QemuOpt *
lookup_scalar(const OptsVisitor *ov, const char *name, Error **errp)
{
if (ov->list_mode == LM_NONE) {
qapi: introduce OptsVisitor This visitor supports parsing -option [type=]discriminator[,optarg1=val1][,optarg2=val2][,...] style QemuOpts objects into "native" C structures. After defining the type tree in the qapi schema (see below), a root type traversal with this visitor linked to the underlying QemuOpts object will build the "native" C representation of the option. The type tree in the schema, corresponding to an option with a discriminator, must have the following structure: struct scalar member for non-discriminated optarg 1 [*] list for repeating non-discriminated optarg 2 [*] wrapper struct single scalar member union struct for discriminator case 1 scalar member for optarg 3 [*] list for repeating optarg 4 [*] wrapper struct single scalar member scalar member for optarg 5 [*] struct for discriminator case 2 ... The "type" optarg name is fixed for the discriminator role. Its schema representation is "union of structures", and each discriminator value must correspond to a member name in the union. If the option takes no "type" descriminator, then the type subtree rooted at the union must be absent from the schema (including the union itself). Optarg values can be of scalar types str / bool / integers / size. Members marked with [*] may be defined as optional in the schema, describing an optional optarg. Repeating an optarg is supported; its schema representation must be "list of structure with single mandatory scalar member". If an optarg is not described as repeating in the schema (ie. it is defined as a scalar field instead of a list), its last occurrence will take effect. Ordering between differently named optargs is not preserved. A mandatory list (or an optional one which is reported to be available), corresponding to a repeating optarg, has at least one element after successful parsing. v1->v2: - Update opts_type_size() prototype to uint64_t. - Add opts_type_uint64() for options needing the full uint64_t range. (Internals could be extracted to "cutils.c".) - Allow negative values in opts_type_int(). - Rebase to nested Makefiles. v2->v3: - Factor opts_visitor_insert() out of opts_start_struct() and call it separately for opts_root->id if there's any. - Don't require non-negative values in opts_type_int()'s error message. - g_malloc0() may return NULL for zero-sized requests. Support empty structures by requesting 1 byte for them instead. Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-07-17 16:17:09 +02:00
GQueue *list;
/* the last occurrence of any QemuOpt takes effect when queried by name
*/
list = lookup_distinct(ov, name, errp);
return list ? g_queue_peek_tail(list) : NULL;
}
assert(ov->list_mode == LM_IN_PROGRESS);
qapi: introduce OptsVisitor This visitor supports parsing -option [type=]discriminator[,optarg1=val1][,optarg2=val2][,...] style QemuOpts objects into "native" C structures. After defining the type tree in the qapi schema (see below), a root type traversal with this visitor linked to the underlying QemuOpts object will build the "native" C representation of the option. The type tree in the schema, corresponding to an option with a discriminator, must have the following structure: struct scalar member for non-discriminated optarg 1 [*] list for repeating non-discriminated optarg 2 [*] wrapper struct single scalar member union struct for discriminator case 1 scalar member for optarg 3 [*] list for repeating optarg 4 [*] wrapper struct single scalar member scalar member for optarg 5 [*] struct for discriminator case 2 ... The "type" optarg name is fixed for the discriminator role. Its schema representation is "union of structures", and each discriminator value must correspond to a member name in the union. If the option takes no "type" descriminator, then the type subtree rooted at the union must be absent from the schema (including the union itself). Optarg values can be of scalar types str / bool / integers / size. Members marked with [*] may be defined as optional in the schema, describing an optional optarg. Repeating an optarg is supported; its schema representation must be "list of structure with single mandatory scalar member". If an optarg is not described as repeating in the schema (ie. it is defined as a scalar field instead of a list), its last occurrence will take effect. Ordering between differently named optargs is not preserved. A mandatory list (or an optional one which is reported to be available), corresponding to a repeating optarg, has at least one element after successful parsing. v1->v2: - Update opts_type_size() prototype to uint64_t. - Add opts_type_uint64() for options needing the full uint64_t range. (Internals could be extracted to "cutils.c".) - Allow negative values in opts_type_int(). - Rebase to nested Makefiles. v2->v3: - Factor opts_visitor_insert() out of opts_start_struct() and call it separately for opts_root->id if there's any. - Don't require non-negative values in opts_type_int()'s error message. - g_malloc0() may return NULL for zero-sized requests. Support empty structures by requesting 1 byte for them instead. Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-07-17 16:17:09 +02:00
return g_queue_peek_head(ov->repeated_opts);
}
static void
processed(OptsVisitor *ov, const char *name)
{
if (ov->list_mode == LM_NONE) {
qapi: introduce OptsVisitor This visitor supports parsing -option [type=]discriminator[,optarg1=val1][,optarg2=val2][,...] style QemuOpts objects into "native" C structures. After defining the type tree in the qapi schema (see below), a root type traversal with this visitor linked to the underlying QemuOpts object will build the "native" C representation of the option. The type tree in the schema, corresponding to an option with a discriminator, must have the following structure: struct scalar member for non-discriminated optarg 1 [*] list for repeating non-discriminated optarg 2 [*] wrapper struct single scalar member union struct for discriminator case 1 scalar member for optarg 3 [*] list for repeating optarg 4 [*] wrapper struct single scalar member scalar member for optarg 5 [*] struct for discriminator case 2 ... The "type" optarg name is fixed for the discriminator role. Its schema representation is "union of structures", and each discriminator value must correspond to a member name in the union. If the option takes no "type" descriminator, then the type subtree rooted at the union must be absent from the schema (including the union itself). Optarg values can be of scalar types str / bool / integers / size. Members marked with [*] may be defined as optional in the schema, describing an optional optarg. Repeating an optarg is supported; its schema representation must be "list of structure with single mandatory scalar member". If an optarg is not described as repeating in the schema (ie. it is defined as a scalar field instead of a list), its last occurrence will take effect. Ordering between differently named optargs is not preserved. A mandatory list (or an optional one which is reported to be available), corresponding to a repeating optarg, has at least one element after successful parsing. v1->v2: - Update opts_type_size() prototype to uint64_t. - Add opts_type_uint64() for options needing the full uint64_t range. (Internals could be extracted to "cutils.c".) - Allow negative values in opts_type_int(). - Rebase to nested Makefiles. v2->v3: - Factor opts_visitor_insert() out of opts_start_struct() and call it separately for opts_root->id if there's any. - Don't require non-negative values in opts_type_int()'s error message. - g_malloc0() may return NULL for zero-sized requests. Support empty structures by requesting 1 byte for them instead. Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-07-17 16:17:09 +02:00
g_hash_table_remove(ov->unprocessed_opts, name);
return;
qapi: introduce OptsVisitor This visitor supports parsing -option [type=]discriminator[,optarg1=val1][,optarg2=val2][,...] style QemuOpts objects into "native" C structures. After defining the type tree in the qapi schema (see below), a root type traversal with this visitor linked to the underlying QemuOpts object will build the "native" C representation of the option. The type tree in the schema, corresponding to an option with a discriminator, must have the following structure: struct scalar member for non-discriminated optarg 1 [*] list for repeating non-discriminated optarg 2 [*] wrapper struct single scalar member union struct for discriminator case 1 scalar member for optarg 3 [*] list for repeating optarg 4 [*] wrapper struct single scalar member scalar member for optarg 5 [*] struct for discriminator case 2 ... The "type" optarg name is fixed for the discriminator role. Its schema representation is "union of structures", and each discriminator value must correspond to a member name in the union. If the option takes no "type" descriminator, then the type subtree rooted at the union must be absent from the schema (including the union itself). Optarg values can be of scalar types str / bool / integers / size. Members marked with [*] may be defined as optional in the schema, describing an optional optarg. Repeating an optarg is supported; its schema representation must be "list of structure with single mandatory scalar member". If an optarg is not described as repeating in the schema (ie. it is defined as a scalar field instead of a list), its last occurrence will take effect. Ordering between differently named optargs is not preserved. A mandatory list (or an optional one which is reported to be available), corresponding to a repeating optarg, has at least one element after successful parsing. v1->v2: - Update opts_type_size() prototype to uint64_t. - Add opts_type_uint64() for options needing the full uint64_t range. (Internals could be extracted to "cutils.c".) - Allow negative values in opts_type_int(). - Rebase to nested Makefiles. v2->v3: - Factor opts_visitor_insert() out of opts_start_struct() and call it separately for opts_root->id if there's any. - Don't require non-negative values in opts_type_int()'s error message. - g_malloc0() may return NULL for zero-sized requests. Support empty structures by requesting 1 byte for them instead. Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-07-17 16:17:09 +02:00
}
assert(ov->list_mode == LM_IN_PROGRESS);
/* do nothing */
qapi: introduce OptsVisitor This visitor supports parsing -option [type=]discriminator[,optarg1=val1][,optarg2=val2][,...] style QemuOpts objects into "native" C structures. After defining the type tree in the qapi schema (see below), a root type traversal with this visitor linked to the underlying QemuOpts object will build the "native" C representation of the option. The type tree in the schema, corresponding to an option with a discriminator, must have the following structure: struct scalar member for non-discriminated optarg 1 [*] list for repeating non-discriminated optarg 2 [*] wrapper struct single scalar member union struct for discriminator case 1 scalar member for optarg 3 [*] list for repeating optarg 4 [*] wrapper struct single scalar member scalar member for optarg 5 [*] struct for discriminator case 2 ... The "type" optarg name is fixed for the discriminator role. Its schema representation is "union of structures", and each discriminator value must correspond to a member name in the union. If the option takes no "type" descriminator, then the type subtree rooted at the union must be absent from the schema (including the union itself). Optarg values can be of scalar types str / bool / integers / size. Members marked with [*] may be defined as optional in the schema, describing an optional optarg. Repeating an optarg is supported; its schema representation must be "list of structure with single mandatory scalar member". If an optarg is not described as repeating in the schema (ie. it is defined as a scalar field instead of a list), its last occurrence will take effect. Ordering between differently named optargs is not preserved. A mandatory list (or an optional one which is reported to be available), corresponding to a repeating optarg, has at least one element after successful parsing. v1->v2: - Update opts_type_size() prototype to uint64_t. - Add opts_type_uint64() for options needing the full uint64_t range. (Internals could be extracted to "cutils.c".) - Allow negative values in opts_type_int(). - Rebase to nested Makefiles. v2->v3: - Factor opts_visitor_insert() out of opts_start_struct() and call it separately for opts_root->id if there's any. - Don't require non-negative values in opts_type_int()'s error message. - g_malloc0() may return NULL for zero-sized requests. Support empty structures by requesting 1 byte for them instead. Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-07-17 16:17:09 +02:00
}
static void
opts_type_str(Visitor *v, char **obj, const char *name, Error **errp)
{
OptsVisitor *ov = DO_UPCAST(OptsVisitor, visitor, v);
const QemuOpt *opt;
opt = lookup_scalar(ov, name, errp);
if (!opt) {
return;
}
*obj = g_strdup(opt->str ? opt->str : "");
processed(ov, name);
}
/* mimics qemu-option.c::parse_option_bool() */
static void
opts_type_bool(Visitor *v, bool *obj, const char *name, Error **errp)
{
OptsVisitor *ov = DO_UPCAST(OptsVisitor, visitor, v);
const QemuOpt *opt;
opt = lookup_scalar(ov, name, errp);
if (!opt) {
return;
}
if (opt->str) {
if (strcmp(opt->str, "on") == 0 ||
strcmp(opt->str, "yes") == 0 ||
strcmp(opt->str, "y") == 0) {
*obj = true;
} else if (strcmp(opt->str, "off") == 0 ||
strcmp(opt->str, "no") == 0 ||
strcmp(opt->str, "n") == 0) {
*obj = false;
} else {
error_set(errp, QERR_INVALID_PARAMETER_VALUE, opt->name,
"on|yes|y|off|no|n");
return;
}
} else {
*obj = true;
}
processed(ov, name);
}
static void
opts_type_int(Visitor *v, int64_t *obj, const char *name, Error **errp)
{
OptsVisitor *ov = DO_UPCAST(OptsVisitor, visitor, v);
const QemuOpt *opt;
const char *str;
long long val;
char *endptr;
if (ov->list_mode == LM_SIGNED_INTERVAL) {
*obj = ov->range_next.s;
return;
}
qapi: introduce OptsVisitor This visitor supports parsing -option [type=]discriminator[,optarg1=val1][,optarg2=val2][,...] style QemuOpts objects into "native" C structures. After defining the type tree in the qapi schema (see below), a root type traversal with this visitor linked to the underlying QemuOpts object will build the "native" C representation of the option. The type tree in the schema, corresponding to an option with a discriminator, must have the following structure: struct scalar member for non-discriminated optarg 1 [*] list for repeating non-discriminated optarg 2 [*] wrapper struct single scalar member union struct for discriminator case 1 scalar member for optarg 3 [*] list for repeating optarg 4 [*] wrapper struct single scalar member scalar member for optarg 5 [*] struct for discriminator case 2 ... The "type" optarg name is fixed for the discriminator role. Its schema representation is "union of structures", and each discriminator value must correspond to a member name in the union. If the option takes no "type" descriminator, then the type subtree rooted at the union must be absent from the schema (including the union itself). Optarg values can be of scalar types str / bool / integers / size. Members marked with [*] may be defined as optional in the schema, describing an optional optarg. Repeating an optarg is supported; its schema representation must be "list of structure with single mandatory scalar member". If an optarg is not described as repeating in the schema (ie. it is defined as a scalar field instead of a list), its last occurrence will take effect. Ordering between differently named optargs is not preserved. A mandatory list (or an optional one which is reported to be available), corresponding to a repeating optarg, has at least one element after successful parsing. v1->v2: - Update opts_type_size() prototype to uint64_t. - Add opts_type_uint64() for options needing the full uint64_t range. (Internals could be extracted to "cutils.c".) - Allow negative values in opts_type_int(). - Rebase to nested Makefiles. v2->v3: - Factor opts_visitor_insert() out of opts_start_struct() and call it separately for opts_root->id if there's any. - Don't require non-negative values in opts_type_int()'s error message. - g_malloc0() may return NULL for zero-sized requests. Support empty structures by requesting 1 byte for them instead. Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-07-17 16:17:09 +02:00
opt = lookup_scalar(ov, name, errp);
if (!opt) {
return;
}
str = opt->str ? opt->str : "";
/* we've gotten past lookup_scalar() */
assert(ov->list_mode == LM_NONE || ov->list_mode == LM_IN_PROGRESS);
qapi: introduce OptsVisitor This visitor supports parsing -option [type=]discriminator[,optarg1=val1][,optarg2=val2][,...] style QemuOpts objects into "native" C structures. After defining the type tree in the qapi schema (see below), a root type traversal with this visitor linked to the underlying QemuOpts object will build the "native" C representation of the option. The type tree in the schema, corresponding to an option with a discriminator, must have the following structure: struct scalar member for non-discriminated optarg 1 [*] list for repeating non-discriminated optarg 2 [*] wrapper struct single scalar member union struct for discriminator case 1 scalar member for optarg 3 [*] list for repeating optarg 4 [*] wrapper struct single scalar member scalar member for optarg 5 [*] struct for discriminator case 2 ... The "type" optarg name is fixed for the discriminator role. Its schema representation is "union of structures", and each discriminator value must correspond to a member name in the union. If the option takes no "type" descriminator, then the type subtree rooted at the union must be absent from the schema (including the union itself). Optarg values can be of scalar types str / bool / integers / size. Members marked with [*] may be defined as optional in the schema, describing an optional optarg. Repeating an optarg is supported; its schema representation must be "list of structure with single mandatory scalar member". If an optarg is not described as repeating in the schema (ie. it is defined as a scalar field instead of a list), its last occurrence will take effect. Ordering between differently named optargs is not preserved. A mandatory list (or an optional one which is reported to be available), corresponding to a repeating optarg, has at least one element after successful parsing. v1->v2: - Update opts_type_size() prototype to uint64_t. - Add opts_type_uint64() for options needing the full uint64_t range. (Internals could be extracted to "cutils.c".) - Allow negative values in opts_type_int(). - Rebase to nested Makefiles. v2->v3: - Factor opts_visitor_insert() out of opts_start_struct() and call it separately for opts_root->id if there's any. - Don't require non-negative values in opts_type_int()'s error message. - g_malloc0() may return NULL for zero-sized requests. Support empty structures by requesting 1 byte for them instead. Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-07-17 16:17:09 +02:00
errno = 0;
val = strtoll(str, &endptr, 0);
if (errno == 0 && endptr > str && INT64_MIN <= val && val <= INT64_MAX) {
if (*endptr == '\0') {
*obj = val;
processed(ov, name);
return;
}
if (*endptr == '-' && ov->list_mode == LM_IN_PROGRESS) {
long long val2;
str = endptr + 1;
val2 = strtoll(str, &endptr, 0);
if (errno == 0 && endptr > str && *endptr == '\0' &&
INT64_MIN <= val2 && val2 <= INT64_MAX && val <= val2 &&
(val > INT64_MAX - OPTS_VISITOR_RANGE_MAX ||
val2 < val + OPTS_VISITOR_RANGE_MAX)) {
ov->range_next.s = val;
ov->range_limit.s = val2;
ov->list_mode = LM_SIGNED_INTERVAL;
/* as if entering on the top */
*obj = ov->range_next.s;
return;
}
}
qapi: introduce OptsVisitor This visitor supports parsing -option [type=]discriminator[,optarg1=val1][,optarg2=val2][,...] style QemuOpts objects into "native" C structures. After defining the type tree in the qapi schema (see below), a root type traversal with this visitor linked to the underlying QemuOpts object will build the "native" C representation of the option. The type tree in the schema, corresponding to an option with a discriminator, must have the following structure: struct scalar member for non-discriminated optarg 1 [*] list for repeating non-discriminated optarg 2 [*] wrapper struct single scalar member union struct for discriminator case 1 scalar member for optarg 3 [*] list for repeating optarg 4 [*] wrapper struct single scalar member scalar member for optarg 5 [*] struct for discriminator case 2 ... The "type" optarg name is fixed for the discriminator role. Its schema representation is "union of structures", and each discriminator value must correspond to a member name in the union. If the option takes no "type" descriminator, then the type subtree rooted at the union must be absent from the schema (including the union itself). Optarg values can be of scalar types str / bool / integers / size. Members marked with [*] may be defined as optional in the schema, describing an optional optarg. Repeating an optarg is supported; its schema representation must be "list of structure with single mandatory scalar member". If an optarg is not described as repeating in the schema (ie. it is defined as a scalar field instead of a list), its last occurrence will take effect. Ordering between differently named optargs is not preserved. A mandatory list (or an optional one which is reported to be available), corresponding to a repeating optarg, has at least one element after successful parsing. v1->v2: - Update opts_type_size() prototype to uint64_t. - Add opts_type_uint64() for options needing the full uint64_t range. (Internals could be extracted to "cutils.c".) - Allow negative values in opts_type_int(). - Rebase to nested Makefiles. v2->v3: - Factor opts_visitor_insert() out of opts_start_struct() and call it separately for opts_root->id if there's any. - Don't require non-negative values in opts_type_int()'s error message. - g_malloc0() may return NULL for zero-sized requests. Support empty structures by requesting 1 byte for them instead. Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-07-17 16:17:09 +02:00
}
error_set(errp, QERR_INVALID_PARAMETER_VALUE, opt->name,
(ov->list_mode == LM_NONE) ? "an int64 value" :
"an int64 value or range");
qapi: introduce OptsVisitor This visitor supports parsing -option [type=]discriminator[,optarg1=val1][,optarg2=val2][,...] style QemuOpts objects into "native" C structures. After defining the type tree in the qapi schema (see below), a root type traversal with this visitor linked to the underlying QemuOpts object will build the "native" C representation of the option. The type tree in the schema, corresponding to an option with a discriminator, must have the following structure: struct scalar member for non-discriminated optarg 1 [*] list for repeating non-discriminated optarg 2 [*] wrapper struct single scalar member union struct for discriminator case 1 scalar member for optarg 3 [*] list for repeating optarg 4 [*] wrapper struct single scalar member scalar member for optarg 5 [*] struct for discriminator case 2 ... The "type" optarg name is fixed for the discriminator role. Its schema representation is "union of structures", and each discriminator value must correspond to a member name in the union. If the option takes no "type" descriminator, then the type subtree rooted at the union must be absent from the schema (including the union itself). Optarg values can be of scalar types str / bool / integers / size. Members marked with [*] may be defined as optional in the schema, describing an optional optarg. Repeating an optarg is supported; its schema representation must be "list of structure with single mandatory scalar member". If an optarg is not described as repeating in the schema (ie. it is defined as a scalar field instead of a list), its last occurrence will take effect. Ordering between differently named optargs is not preserved. A mandatory list (or an optional one which is reported to be available), corresponding to a repeating optarg, has at least one element after successful parsing. v1->v2: - Update opts_type_size() prototype to uint64_t. - Add opts_type_uint64() for options needing the full uint64_t range. (Internals could be extracted to "cutils.c".) - Allow negative values in opts_type_int(). - Rebase to nested Makefiles. v2->v3: - Factor opts_visitor_insert() out of opts_start_struct() and call it separately for opts_root->id if there's any. - Don't require non-negative values in opts_type_int()'s error message. - g_malloc0() may return NULL for zero-sized requests. Support empty structures by requesting 1 byte for them instead. Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-07-17 16:17:09 +02:00
}
static void
opts_type_uint64(Visitor *v, uint64_t *obj, const char *name, Error **errp)
{
OptsVisitor *ov = DO_UPCAST(OptsVisitor, visitor, v);
const QemuOpt *opt;
const char *str;
unsigned long long val;
char *endptr;
qapi: introduce OptsVisitor This visitor supports parsing -option [type=]discriminator[,optarg1=val1][,optarg2=val2][,...] style QemuOpts objects into "native" C structures. After defining the type tree in the qapi schema (see below), a root type traversal with this visitor linked to the underlying QemuOpts object will build the "native" C representation of the option. The type tree in the schema, corresponding to an option with a discriminator, must have the following structure: struct scalar member for non-discriminated optarg 1 [*] list for repeating non-discriminated optarg 2 [*] wrapper struct single scalar member union struct for discriminator case 1 scalar member for optarg 3 [*] list for repeating optarg 4 [*] wrapper struct single scalar member scalar member for optarg 5 [*] struct for discriminator case 2 ... The "type" optarg name is fixed for the discriminator role. Its schema representation is "union of structures", and each discriminator value must correspond to a member name in the union. If the option takes no "type" descriminator, then the type subtree rooted at the union must be absent from the schema (including the union itself). Optarg values can be of scalar types str / bool / integers / size. Members marked with [*] may be defined as optional in the schema, describing an optional optarg. Repeating an optarg is supported; its schema representation must be "list of structure with single mandatory scalar member". If an optarg is not described as repeating in the schema (ie. it is defined as a scalar field instead of a list), its last occurrence will take effect. Ordering between differently named optargs is not preserved. A mandatory list (or an optional one which is reported to be available), corresponding to a repeating optarg, has at least one element after successful parsing. v1->v2: - Update opts_type_size() prototype to uint64_t. - Add opts_type_uint64() for options needing the full uint64_t range. (Internals could be extracted to "cutils.c".) - Allow negative values in opts_type_int(). - Rebase to nested Makefiles. v2->v3: - Factor opts_visitor_insert() out of opts_start_struct() and call it separately for opts_root->id if there's any. - Don't require non-negative values in opts_type_int()'s error message. - g_malloc0() may return NULL for zero-sized requests. Support empty structures by requesting 1 byte for them instead. Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-07-17 16:17:09 +02:00
if (ov->list_mode == LM_UNSIGNED_INTERVAL) {
*obj = ov->range_next.u;
return;
}
qapi: introduce OptsVisitor This visitor supports parsing -option [type=]discriminator[,optarg1=val1][,optarg2=val2][,...] style QemuOpts objects into "native" C structures. After defining the type tree in the qapi schema (see below), a root type traversal with this visitor linked to the underlying QemuOpts object will build the "native" C representation of the option. The type tree in the schema, corresponding to an option with a discriminator, must have the following structure: struct scalar member for non-discriminated optarg 1 [*] list for repeating non-discriminated optarg 2 [*] wrapper struct single scalar member union struct for discriminator case 1 scalar member for optarg 3 [*] list for repeating optarg 4 [*] wrapper struct single scalar member scalar member for optarg 5 [*] struct for discriminator case 2 ... The "type" optarg name is fixed for the discriminator role. Its schema representation is "union of structures", and each discriminator value must correspond to a member name in the union. If the option takes no "type" descriminator, then the type subtree rooted at the union must be absent from the schema (including the union itself). Optarg values can be of scalar types str / bool / integers / size. Members marked with [*] may be defined as optional in the schema, describing an optional optarg. Repeating an optarg is supported; its schema representation must be "list of structure with single mandatory scalar member". If an optarg is not described as repeating in the schema (ie. it is defined as a scalar field instead of a list), its last occurrence will take effect. Ordering between differently named optargs is not preserved. A mandatory list (or an optional one which is reported to be available), corresponding to a repeating optarg, has at least one element after successful parsing. v1->v2: - Update opts_type_size() prototype to uint64_t. - Add opts_type_uint64() for options needing the full uint64_t range. (Internals could be extracted to "cutils.c".) - Allow negative values in opts_type_int(). - Rebase to nested Makefiles. v2->v3: - Factor opts_visitor_insert() out of opts_start_struct() and call it separately for opts_root->id if there's any. - Don't require non-negative values in opts_type_int()'s error message. - g_malloc0() may return NULL for zero-sized requests. Support empty structures by requesting 1 byte for them instead. Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-07-17 16:17:09 +02:00
opt = lookup_scalar(ov, name, errp);
if (!opt) {
return;
}
str = opt->str;
/* we've gotten past lookup_scalar() */
assert(ov->list_mode == LM_NONE || ov->list_mode == LM_IN_PROGRESS);
if (parse_uint(str, &val, &endptr, 0) == 0 && val <= UINT64_MAX) {
if (*endptr == '\0') {
*obj = val;
processed(ov, name);
return;
}
if (*endptr == '-' && ov->list_mode == LM_IN_PROGRESS) {
unsigned long long val2;
str = endptr + 1;
if (parse_uint_full(str, &val2, 0) == 0 &&
val2 <= UINT64_MAX && val <= val2 &&
val2 - val < OPTS_VISITOR_RANGE_MAX) {
ov->range_next.u = val;
ov->range_limit.u = val2;
ov->list_mode = LM_UNSIGNED_INTERVAL;
/* as if entering on the top */
*obj = ov->range_next.u;
return;
}
}
qapi: introduce OptsVisitor This visitor supports parsing -option [type=]discriminator[,optarg1=val1][,optarg2=val2][,...] style QemuOpts objects into "native" C structures. After defining the type tree in the qapi schema (see below), a root type traversal with this visitor linked to the underlying QemuOpts object will build the "native" C representation of the option. The type tree in the schema, corresponding to an option with a discriminator, must have the following structure: struct scalar member for non-discriminated optarg 1 [*] list for repeating non-discriminated optarg 2 [*] wrapper struct single scalar member union struct for discriminator case 1 scalar member for optarg 3 [*] list for repeating optarg 4 [*] wrapper struct single scalar member scalar member for optarg 5 [*] struct for discriminator case 2 ... The "type" optarg name is fixed for the discriminator role. Its schema representation is "union of structures", and each discriminator value must correspond to a member name in the union. If the option takes no "type" descriminator, then the type subtree rooted at the union must be absent from the schema (including the union itself). Optarg values can be of scalar types str / bool / integers / size. Members marked with [*] may be defined as optional in the schema, describing an optional optarg. Repeating an optarg is supported; its schema representation must be "list of structure with single mandatory scalar member". If an optarg is not described as repeating in the schema (ie. it is defined as a scalar field instead of a list), its last occurrence will take effect. Ordering between differently named optargs is not preserved. A mandatory list (or an optional one which is reported to be available), corresponding to a repeating optarg, has at least one element after successful parsing. v1->v2: - Update opts_type_size() prototype to uint64_t. - Add opts_type_uint64() for options needing the full uint64_t range. (Internals could be extracted to "cutils.c".) - Allow negative values in opts_type_int(). - Rebase to nested Makefiles. v2->v3: - Factor opts_visitor_insert() out of opts_start_struct() and call it separately for opts_root->id if there's any. - Don't require non-negative values in opts_type_int()'s error message. - g_malloc0() may return NULL for zero-sized requests. Support empty structures by requesting 1 byte for them instead. Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-07-17 16:17:09 +02:00
}
error_set(errp, QERR_INVALID_PARAMETER_VALUE, opt->name,
(ov->list_mode == LM_NONE) ? "a uint64 value" :
"a uint64 value or range");
qapi: introduce OptsVisitor This visitor supports parsing -option [type=]discriminator[,optarg1=val1][,optarg2=val2][,...] style QemuOpts objects into "native" C structures. After defining the type tree in the qapi schema (see below), a root type traversal with this visitor linked to the underlying QemuOpts object will build the "native" C representation of the option. The type tree in the schema, corresponding to an option with a discriminator, must have the following structure: struct scalar member for non-discriminated optarg 1 [*] list for repeating non-discriminated optarg 2 [*] wrapper struct single scalar member union struct for discriminator case 1 scalar member for optarg 3 [*] list for repeating optarg 4 [*] wrapper struct single scalar member scalar member for optarg 5 [*] struct for discriminator case 2 ... The "type" optarg name is fixed for the discriminator role. Its schema representation is "union of structures", and each discriminator value must correspond to a member name in the union. If the option takes no "type" descriminator, then the type subtree rooted at the union must be absent from the schema (including the union itself). Optarg values can be of scalar types str / bool / integers / size. Members marked with [*] may be defined as optional in the schema, describing an optional optarg. Repeating an optarg is supported; its schema representation must be "list of structure with single mandatory scalar member". If an optarg is not described as repeating in the schema (ie. it is defined as a scalar field instead of a list), its last occurrence will take effect. Ordering between differently named optargs is not preserved. A mandatory list (or an optional one which is reported to be available), corresponding to a repeating optarg, has at least one element after successful parsing. v1->v2: - Update opts_type_size() prototype to uint64_t. - Add opts_type_uint64() for options needing the full uint64_t range. (Internals could be extracted to "cutils.c".) - Allow negative values in opts_type_int(). - Rebase to nested Makefiles. v2->v3: - Factor opts_visitor_insert() out of opts_start_struct() and call it separately for opts_root->id if there's any. - Don't require non-negative values in opts_type_int()'s error message. - g_malloc0() may return NULL for zero-sized requests. Support empty structures by requesting 1 byte for them instead. Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-07-17 16:17:09 +02:00
}
static void
opts_type_size(Visitor *v, uint64_t *obj, const char *name, Error **errp)
{
OptsVisitor *ov = DO_UPCAST(OptsVisitor, visitor, v);
const QemuOpt *opt;
int64_t val;
char *endptr;
opt = lookup_scalar(ov, name, errp);
if (!opt) {
return;
}
val = strtosz_suffix(opt->str ? opt->str : "", &endptr,
STRTOSZ_DEFSUFFIX_B);
if (val < 0 || *endptr) {
error_set(errp, QERR_INVALID_PARAMETER_VALUE, opt->name,
"a size value representible as a non-negative int64");
qapi: introduce OptsVisitor This visitor supports parsing -option [type=]discriminator[,optarg1=val1][,optarg2=val2][,...] style QemuOpts objects into "native" C structures. After defining the type tree in the qapi schema (see below), a root type traversal with this visitor linked to the underlying QemuOpts object will build the "native" C representation of the option. The type tree in the schema, corresponding to an option with a discriminator, must have the following structure: struct scalar member for non-discriminated optarg 1 [*] list for repeating non-discriminated optarg 2 [*] wrapper struct single scalar member union struct for discriminator case 1 scalar member for optarg 3 [*] list for repeating optarg 4 [*] wrapper struct single scalar member scalar member for optarg 5 [*] struct for discriminator case 2 ... The "type" optarg name is fixed for the discriminator role. Its schema representation is "union of structures", and each discriminator value must correspond to a member name in the union. If the option takes no "type" descriminator, then the type subtree rooted at the union must be absent from the schema (including the union itself). Optarg values can be of scalar types str / bool / integers / size. Members marked with [*] may be defined as optional in the schema, describing an optional optarg. Repeating an optarg is supported; its schema representation must be "list of structure with single mandatory scalar member". If an optarg is not described as repeating in the schema (ie. it is defined as a scalar field instead of a list), its last occurrence will take effect. Ordering between differently named optargs is not preserved. A mandatory list (or an optional one which is reported to be available), corresponding to a repeating optarg, has at least one element after successful parsing. v1->v2: - Update opts_type_size() prototype to uint64_t. - Add opts_type_uint64() for options needing the full uint64_t range. (Internals could be extracted to "cutils.c".) - Allow negative values in opts_type_int(). - Rebase to nested Makefiles. v2->v3: - Factor opts_visitor_insert() out of opts_start_struct() and call it separately for opts_root->id if there's any. - Don't require non-negative values in opts_type_int()'s error message. - g_malloc0() may return NULL for zero-sized requests. Support empty structures by requesting 1 byte for them instead. Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-07-17 16:17:09 +02:00
return;
}
*obj = val;
processed(ov, name);
qapi: introduce OptsVisitor This visitor supports parsing -option [type=]discriminator[,optarg1=val1][,optarg2=val2][,...] style QemuOpts objects into "native" C structures. After defining the type tree in the qapi schema (see below), a root type traversal with this visitor linked to the underlying QemuOpts object will build the "native" C representation of the option. The type tree in the schema, corresponding to an option with a discriminator, must have the following structure: struct scalar member for non-discriminated optarg 1 [*] list for repeating non-discriminated optarg 2 [*] wrapper struct single scalar member union struct for discriminator case 1 scalar member for optarg 3 [*] list for repeating optarg 4 [*] wrapper struct single scalar member scalar member for optarg 5 [*] struct for discriminator case 2 ... The "type" optarg name is fixed for the discriminator role. Its schema representation is "union of structures", and each discriminator value must correspond to a member name in the union. If the option takes no "type" descriminator, then the type subtree rooted at the union must be absent from the schema (including the union itself). Optarg values can be of scalar types str / bool / integers / size. Members marked with [*] may be defined as optional in the schema, describing an optional optarg. Repeating an optarg is supported; its schema representation must be "list of structure with single mandatory scalar member". If an optarg is not described as repeating in the schema (ie. it is defined as a scalar field instead of a list), its last occurrence will take effect. Ordering between differently named optargs is not preserved. A mandatory list (or an optional one which is reported to be available), corresponding to a repeating optarg, has at least one element after successful parsing. v1->v2: - Update opts_type_size() prototype to uint64_t. - Add opts_type_uint64() for options needing the full uint64_t range. (Internals could be extracted to "cutils.c".) - Allow negative values in opts_type_int(). - Rebase to nested Makefiles. v2->v3: - Factor opts_visitor_insert() out of opts_start_struct() and call it separately for opts_root->id if there's any. - Don't require non-negative values in opts_type_int()'s error message. - g_malloc0() may return NULL for zero-sized requests. Support empty structures by requesting 1 byte for them instead. Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-07-17 16:17:09 +02:00
}
static void
opts_optional(Visitor *v, bool *present, const char *name, Error **errp)
qapi: introduce OptsVisitor This visitor supports parsing -option [type=]discriminator[,optarg1=val1][,optarg2=val2][,...] style QemuOpts objects into "native" C structures. After defining the type tree in the qapi schema (see below), a root type traversal with this visitor linked to the underlying QemuOpts object will build the "native" C representation of the option. The type tree in the schema, corresponding to an option with a discriminator, must have the following structure: struct scalar member for non-discriminated optarg 1 [*] list for repeating non-discriminated optarg 2 [*] wrapper struct single scalar member union struct for discriminator case 1 scalar member for optarg 3 [*] list for repeating optarg 4 [*] wrapper struct single scalar member scalar member for optarg 5 [*] struct for discriminator case 2 ... The "type" optarg name is fixed for the discriminator role. Its schema representation is "union of structures", and each discriminator value must correspond to a member name in the union. If the option takes no "type" descriminator, then the type subtree rooted at the union must be absent from the schema (including the union itself). Optarg values can be of scalar types str / bool / integers / size. Members marked with [*] may be defined as optional in the schema, describing an optional optarg. Repeating an optarg is supported; its schema representation must be "list of structure with single mandatory scalar member". If an optarg is not described as repeating in the schema (ie. it is defined as a scalar field instead of a list), its last occurrence will take effect. Ordering between differently named optargs is not preserved. A mandatory list (or an optional one which is reported to be available), corresponding to a repeating optarg, has at least one element after successful parsing. v1->v2: - Update opts_type_size() prototype to uint64_t. - Add opts_type_uint64() for options needing the full uint64_t range. (Internals could be extracted to "cutils.c".) - Allow negative values in opts_type_int(). - Rebase to nested Makefiles. v2->v3: - Factor opts_visitor_insert() out of opts_start_struct() and call it separately for opts_root->id if there's any. - Don't require non-negative values in opts_type_int()'s error message. - g_malloc0() may return NULL for zero-sized requests. Support empty structures by requesting 1 byte for them instead. Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-07-17 16:17:09 +02:00
{
OptsVisitor *ov = DO_UPCAST(OptsVisitor, visitor, v);
/* we only support a single mandatory scalar field in a list node */
assert(ov->list_mode == LM_NONE);
qapi: introduce OptsVisitor This visitor supports parsing -option [type=]discriminator[,optarg1=val1][,optarg2=val2][,...] style QemuOpts objects into "native" C structures. After defining the type tree in the qapi schema (see below), a root type traversal with this visitor linked to the underlying QemuOpts object will build the "native" C representation of the option. The type tree in the schema, corresponding to an option with a discriminator, must have the following structure: struct scalar member for non-discriminated optarg 1 [*] list for repeating non-discriminated optarg 2 [*] wrapper struct single scalar member union struct for discriminator case 1 scalar member for optarg 3 [*] list for repeating optarg 4 [*] wrapper struct single scalar member scalar member for optarg 5 [*] struct for discriminator case 2 ... The "type" optarg name is fixed for the discriminator role. Its schema representation is "union of structures", and each discriminator value must correspond to a member name in the union. If the option takes no "type" descriminator, then the type subtree rooted at the union must be absent from the schema (including the union itself). Optarg values can be of scalar types str / bool / integers / size. Members marked with [*] may be defined as optional in the schema, describing an optional optarg. Repeating an optarg is supported; its schema representation must be "list of structure with single mandatory scalar member". If an optarg is not described as repeating in the schema (ie. it is defined as a scalar field instead of a list), its last occurrence will take effect. Ordering between differently named optargs is not preserved. A mandatory list (or an optional one which is reported to be available), corresponding to a repeating optarg, has at least one element after successful parsing. v1->v2: - Update opts_type_size() prototype to uint64_t. - Add opts_type_uint64() for options needing the full uint64_t range. (Internals could be extracted to "cutils.c".) - Allow negative values in opts_type_int(). - Rebase to nested Makefiles. v2->v3: - Factor opts_visitor_insert() out of opts_start_struct() and call it separately for opts_root->id if there's any. - Don't require non-negative values in opts_type_int()'s error message. - g_malloc0() may return NULL for zero-sized requests. Support empty structures by requesting 1 byte for them instead. Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-07-17 16:17:09 +02:00
*present = (lookup_distinct(ov, name, NULL) != NULL);
}
OptsVisitor *
opts_visitor_new(const QemuOpts *opts)
{
OptsVisitor *ov;
ov = g_malloc0(sizeof *ov);
ov->visitor.start_struct = &opts_start_struct;
ov->visitor.end_struct = &opts_end_struct;
ov->visitor.start_list = &opts_start_list;
ov->visitor.next_list = &opts_next_list;
ov->visitor.end_list = &opts_end_list;
/* input_type_enum() covers both "normal" enums and union discriminators.
* The union discriminator field is always generated as "type"; it should
* match the "type" QemuOpt child of any QemuOpts.
*
* input_type_enum() will remove the looked-up key from the
* "unprocessed_opts" hash even if the lookup fails, because the removal is
* done earlier in opts_type_str(). This should be harmless.
*/
ov->visitor.type_enum = &input_type_enum;
ov->visitor.type_int = &opts_type_int;
ov->visitor.type_uint64 = &opts_type_uint64;
ov->visitor.type_size = &opts_type_size;
ov->visitor.type_bool = &opts_type_bool;
ov->visitor.type_str = &opts_type_str;
/* type_number() is not filled in, but this is not the first visitor to
* skip some mandatory methods... */
ov->visitor.optional = &opts_optional;
qapi: introduce OptsVisitor This visitor supports parsing -option [type=]discriminator[,optarg1=val1][,optarg2=val2][,...] style QemuOpts objects into "native" C structures. After defining the type tree in the qapi schema (see below), a root type traversal with this visitor linked to the underlying QemuOpts object will build the "native" C representation of the option. The type tree in the schema, corresponding to an option with a discriminator, must have the following structure: struct scalar member for non-discriminated optarg 1 [*] list for repeating non-discriminated optarg 2 [*] wrapper struct single scalar member union struct for discriminator case 1 scalar member for optarg 3 [*] list for repeating optarg 4 [*] wrapper struct single scalar member scalar member for optarg 5 [*] struct for discriminator case 2 ... The "type" optarg name is fixed for the discriminator role. Its schema representation is "union of structures", and each discriminator value must correspond to a member name in the union. If the option takes no "type" descriminator, then the type subtree rooted at the union must be absent from the schema (including the union itself). Optarg values can be of scalar types str / bool / integers / size. Members marked with [*] may be defined as optional in the schema, describing an optional optarg. Repeating an optarg is supported; its schema representation must be "list of structure with single mandatory scalar member". If an optarg is not described as repeating in the schema (ie. it is defined as a scalar field instead of a list), its last occurrence will take effect. Ordering between differently named optargs is not preserved. A mandatory list (or an optional one which is reported to be available), corresponding to a repeating optarg, has at least one element after successful parsing. v1->v2: - Update opts_type_size() prototype to uint64_t. - Add opts_type_uint64() for options needing the full uint64_t range. (Internals could be extracted to "cutils.c".) - Allow negative values in opts_type_int(). - Rebase to nested Makefiles. v2->v3: - Factor opts_visitor_insert() out of opts_start_struct() and call it separately for opts_root->id if there's any. - Don't require non-negative values in opts_type_int()'s error message. - g_malloc0() may return NULL for zero-sized requests. Support empty structures by requesting 1 byte for them instead. Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-07-17 16:17:09 +02:00
ov->opts_root = opts;
return ov;
}
void
opts_visitor_cleanup(OptsVisitor *ov)
{
if (ov->unprocessed_opts != NULL) {
g_hash_table_destroy(ov->unprocessed_opts);
}
g_free(ov->fake_id_opt);
g_free(ov);
qapi: introduce OptsVisitor This visitor supports parsing -option [type=]discriminator[,optarg1=val1][,optarg2=val2][,...] style QemuOpts objects into "native" C structures. After defining the type tree in the qapi schema (see below), a root type traversal with this visitor linked to the underlying QemuOpts object will build the "native" C representation of the option. The type tree in the schema, corresponding to an option with a discriminator, must have the following structure: struct scalar member for non-discriminated optarg 1 [*] list for repeating non-discriminated optarg 2 [*] wrapper struct single scalar member union struct for discriminator case 1 scalar member for optarg 3 [*] list for repeating optarg 4 [*] wrapper struct single scalar member scalar member for optarg 5 [*] struct for discriminator case 2 ... The "type" optarg name is fixed for the discriminator role. Its schema representation is "union of structures", and each discriminator value must correspond to a member name in the union. If the option takes no "type" descriminator, then the type subtree rooted at the union must be absent from the schema (including the union itself). Optarg values can be of scalar types str / bool / integers / size. Members marked with [*] may be defined as optional in the schema, describing an optional optarg. Repeating an optarg is supported; its schema representation must be "list of structure with single mandatory scalar member". If an optarg is not described as repeating in the schema (ie. it is defined as a scalar field instead of a list), its last occurrence will take effect. Ordering between differently named optargs is not preserved. A mandatory list (or an optional one which is reported to be available), corresponding to a repeating optarg, has at least one element after successful parsing. v1->v2: - Update opts_type_size() prototype to uint64_t. - Add opts_type_uint64() for options needing the full uint64_t range. (Internals could be extracted to "cutils.c".) - Allow negative values in opts_type_int(). - Rebase to nested Makefiles. v2->v3: - Factor opts_visitor_insert() out of opts_start_struct() and call it separately for opts_root->id if there's any. - Don't require non-negative values in opts_type_int()'s error message. - g_malloc0() may return NULL for zero-sized requests. Support empty structures by requesting 1 byte for them instead. Signed-off-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-07-17 16:17:09 +02:00
}
Visitor *
opts_get_visitor(OptsVisitor *ov)
{
return &ov->visitor;
}