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-rw-r--r--qapi/string-output-visitor.c229
1 files changed, 219 insertions, 10 deletions
diff --git a/qapi/string-output-visitor.c b/qapi/string-output-visitor.c
index fb1d2e806d..1c0834abad 100644
--- a/qapi/string-output-visitor.c
+++ b/qapi/string-output-visitor.c
@@ -16,32 +16,181 @@
#include "qapi/qmp/qerror.h"
#include "qemu/host-utils.h"
#include <math.h>
+#include "qemu/range.h"
+
+enum ListMode {
+ LM_NONE, /* not traversing a list of repeated options */
+ LM_STARTED, /* start_list() succeeded */
+
+ LM_IN_PROGRESS, /* 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, /* 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. */
+
+ LM_END
+};
+
+typedef enum ListMode ListMode;
struct StringOutputVisitor
{
Visitor visitor;
bool human;
- char *string;
+ GString *string;
+ bool head;
+ ListMode list_mode;
+ union {
+ int64_t s;
+ uint64_t u;
+ } range_start, range_end;
+ GList *ranges;
};
static void string_output_set(StringOutputVisitor *sov, char *string)
{
- g_free(sov->string);
- sov->string = string;
+ if (sov->string) {
+ g_string_free(sov->string, true);
+ }
+ sov->string = g_string_new(string);
+ g_free(string);
+}
+
+static void string_output_append(StringOutputVisitor *sov, int64_t a)
+{
+ Range *r = g_malloc0(sizeof(*r));
+ r->begin = a;
+ r->end = a + 1;
+ sov->ranges = g_list_insert_sorted_merged(sov->ranges, r, range_compare);
+}
+
+static void string_output_append_range(StringOutputVisitor *sov,
+ int64_t s, int64_t e)
+{
+ Range *r = g_malloc0(sizeof(*r));
+ r->begin = s;
+ r->end = e + 1;
+ sov->ranges = g_list_insert_sorted_merged(sov->ranges, r, range_compare);
+}
+
+static void format_string(StringOutputVisitor *sov, Range *r, bool next,
+ bool human)
+{
+ if (r->end - r->begin > 1) {
+ if (human) {
+ g_string_append_printf(sov->string, "%" PRIx64 "-%" PRIx64,
+ r->begin, r->end - 1);
+
+ } else {
+ g_string_append_printf(sov->string, "%" PRId64 "-%" PRId64,
+ r->begin, r->end - 1);
+ }
+ } else {
+ if (human) {
+ g_string_append_printf(sov->string, "%" PRIx64, r->begin);
+ } else {
+ g_string_append_printf(sov->string, "%" PRId64, r->begin);
+ }
+ }
+ if (next) {
+ g_string_append(sov->string, ",");
+ }
}
static void print_type_int(Visitor *v, int64_t *obj, const char *name,
Error **errp)
{
StringOutputVisitor *sov = DO_UPCAST(StringOutputVisitor, visitor, v);
- char *out;
+ GList *l;
+
+ switch (sov->list_mode) {
+ case LM_NONE:
+ string_output_append(sov, *obj);
+ break;
+
+ case LM_STARTED:
+ sov->range_start.s = *obj;
+ sov->range_end.s = *obj;
+ sov->list_mode = LM_IN_PROGRESS;
+ return;
+
+ case LM_IN_PROGRESS:
+ if (sov->range_end.s + 1 == *obj) {
+ sov->range_end.s++;
+ } else {
+ if (sov->range_start.s == sov->range_end.s) {
+ string_output_append(sov, sov->range_end.s);
+ } else {
+ assert(sov->range_start.s < sov->range_end.s);
+ string_output_append_range(sov, sov->range_start.s,
+ sov->range_end.s);
+ }
+
+ sov->range_start.s = *obj;
+ sov->range_end.s = *obj;
+ }
+ return;
+
+ case LM_END:
+ if (sov->range_end.s + 1 == *obj) {
+ sov->range_end.s++;
+ assert(sov->range_start.s < sov->range_end.s);
+ string_output_append_range(sov, sov->range_start.s,
+ sov->range_end.s);
+ } else {
+ if (sov->range_start.s == sov->range_end.s) {
+ string_output_append(sov, sov->range_end.s);
+ } else {
+ assert(sov->range_start.s < sov->range_end.s);
+
+ string_output_append_range(sov, sov->range_start.s,
+ sov->range_end.s);
+ }
+ string_output_append(sov, *obj);
+ }
+ break;
+
+ default:
+ abort();
+ }
+
+ l = sov->ranges;
+ while (l) {
+ Range *r = l->data;
+ format_string(sov, r, l->next != NULL, false);
+ l = l->next;
+ }
if (sov->human) {
- out = g_strdup_printf("%lld (%#llx)", (long long) *obj, (long long) *obj);
- } else {
- out = g_strdup_printf("%lld", (long long) *obj);
+ l = sov->ranges;
+ g_string_append(sov->string, " (");
+ while (l) {
+ Range *r = l->data;
+ format_string(sov, r, l->next != NULL, false);
+ l = l->next;
+ }
+ g_string_append(sov->string, ")");
}
- string_output_set(sov, out);
}
static void print_type_size(Visitor *v, uint64_t *obj, const char *name,
@@ -103,9 +252,61 @@ static void print_type_number(Visitor *v, double *obj, const char *name,
string_output_set(sov, g_strdup_printf("%f", *obj));
}
+static void
+start_list(Visitor *v, const char *name, Error **errp)
+{
+ StringOutputVisitor *sov = DO_UPCAST(StringOutputVisitor, visitor, v);
+
+ /* we can't traverse a list in a list */
+ assert(sov->list_mode == LM_NONE);
+ sov->list_mode = LM_STARTED;
+ sov->head = true;
+}
+
+static GenericList *
+next_list(Visitor *v, GenericList **list, Error **errp)
+{
+ StringOutputVisitor *sov = DO_UPCAST(StringOutputVisitor, visitor, v);
+ GenericList *ret = NULL;
+ if (*list) {
+ if (sov->head) {
+ ret = *list;
+ } else {
+ ret = (*list)->next;
+ }
+
+ if (sov->head) {
+ if (ret && ret->next == NULL) {
+ sov->list_mode = LM_NONE;
+ }
+ sov->head = false;
+ } else {
+ if (ret && ret->next == NULL) {
+ sov->list_mode = LM_END;
+ }
+ }
+ }
+
+ return ret;
+}
+
+static void
+end_list(Visitor *v, Error **errp)
+{
+ StringOutputVisitor *sov = DO_UPCAST(StringOutputVisitor, visitor, v);
+
+ assert(sov->list_mode == LM_STARTED ||
+ sov->list_mode == LM_END ||
+ sov->list_mode == LM_NONE ||
+ sov->list_mode == LM_IN_PROGRESS);
+ sov->list_mode = LM_NONE;
+ sov->head = true;
+
+}
+
char *string_output_get_string(StringOutputVisitor *sov)
{
- char *string = sov->string;
+ char *string = g_string_free(sov->string, false);
sov->string = NULL;
return string;
}
@@ -117,7 +318,11 @@ Visitor *string_output_get_visitor(StringOutputVisitor *sov)
void string_output_visitor_cleanup(StringOutputVisitor *sov)
{
- g_free(sov->string);
+ if (sov->string) {
+ g_string_free(sov->string, true);
+ }
+
+ g_list_free_full(sov->ranges, g_free);
g_free(sov);
}
@@ -127,6 +332,7 @@ StringOutputVisitor *string_output_visitor_new(bool human)
v = g_malloc0(sizeof(*v));
+ v->string = g_string_new(NULL);
v->human = human;
v->visitor.type_enum = output_type_enum;
v->visitor.type_int = print_type_int;
@@ -134,6 +340,9 @@ StringOutputVisitor *string_output_visitor_new(bool human)
v->visitor.type_bool = print_type_bool;
v->visitor.type_str = print_type_str;
v->visitor.type_number = print_type_number;
+ v->visitor.start_list = start_list;
+ v->visitor.next_list = next_list;
+ v->visitor.end_list = end_list;
return v;
}
generated by cgit v1.2.3 (git 2.26.2) at 2024-11-27 09:47:40 +0000