/*
* String printing Visitor
*
- * Copyright Red Hat, Inc. 2012
+ * Copyright Red Hat, Inc. 2012-2016
*
* Author: Paolo Bonzini <pbonzini@redhat.com>
*
*
*/
+#include "qemu/osdep.h"
#include "qemu-common.h"
-#include "string-output-visitor.h"
-#include "qapi/qapi-visit-impl.h"
-#include "qerror.h"
+#include "qapi/string-output-visitor.h"
+#include "qapi/visitor-impl.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, /* next_list() ready to be called */
+
+ 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, /* next_list() called, about to see last element. */
+};
+
+typedef enum ListMode ListMode;
struct StringOutputVisitor
{
Visitor visitor;
- char *string;
+ bool human;
+ GString *string;
+ char **result;
+ ListMode list_mode;
+ union {
+ int64_t s;
+ uint64_t u;
+ } range_start, range_end;
+ GList *ranges;
+ void *list; /* Only needed for sanity checking the caller */
};
+static StringOutputVisitor *to_sov(Visitor *v)
+{
+ return container_of(v, StringOutputVisitor, visitor);
+}
+
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 print_type_int(Visitor *v, int64_t *obj, const char *name,
- Error **errp)
+static void string_output_append(StringOutputVisitor *sov, int64_t a)
+{
+ Range *r = g_malloc0(sizeof(*r));
+
+ range_set_bounds(r, a, a);
+ sov->ranges = range_list_insert(sov->ranges, r);
+}
+
+static void string_output_append_range(StringOutputVisitor *sov,
+ int64_t s, int64_t e)
+{
+ Range *r = g_malloc0(sizeof(*r));
+
+ range_set_bounds(r, s, e);
+ sov->ranges = range_list_insert(sov->ranges, r);
+}
+
+static void format_string(StringOutputVisitor *sov, Range *r, bool next,
+ bool human)
+{
+ if (range_lob(r) != range_upb(r)) {
+ if (human) {
+ g_string_append_printf(sov->string, "0x%" PRIx64 "-0x%" PRIx64,
+ range_lob(r), range_upb(r));
+
+ } else {
+ g_string_append_printf(sov->string, "%" PRId64 "-%" PRId64,
+ range_lob(r), range_upb(r));
+ }
+ } else {
+ if (human) {
+ g_string_append_printf(sov->string, "0x%" PRIx64, range_lob(r));
+ } else {
+ g_string_append_printf(sov->string, "%" PRId64, range_lob(r));
+ }
+ }
+ if (next) {
+ g_string_append(sov->string, ",");
+ }
+}
+
+static void print_type_int64(Visitor *v, const char *name, int64_t *obj,
+ Error **errp)
+{
+ StringOutputVisitor *sov = to_sov(v);
+ 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) {
+ l = sov->ranges;
+ g_string_append(sov->string, " (");
+ while (l) {
+ Range *r = l->data;
+ format_string(sov, r, l->next != NULL, true);
+ l = l->next;
+ }
+ g_string_append(sov->string, ")");
+ }
+}
+
+static void print_type_uint64(Visitor *v, const char *name, uint64_t *obj,
+ Error **errp)
+{
+ /* FIXME: print_type_int64 mishandles values over INT64_MAX */
+ int64_t i = *obj;
+ print_type_int64(v, name, &i, errp);
+}
+
+static void print_type_size(Visitor *v, const char *name, uint64_t *obj,
+ Error **errp)
{
- StringOutputVisitor *sov = DO_UPCAST(StringOutputVisitor, visitor, v);
- string_output_set(sov, g_strdup_printf("%lld", (long long) *obj));
+ StringOutputVisitor *sov = to_sov(v);
+ uint64_t val;
+ char *out, *psize;
+
+ if (!sov->human) {
+ out = g_strdup_printf("%"PRIu64, *obj);
+ string_output_set(sov, out);
+ return;
+ }
+
+ val = *obj;
+ psize = size_to_str(val);
+ out = g_strdup_printf("%"PRIu64" (%s)", val, psize);
+ string_output_set(sov, out);
+
+ g_free(psize);
}
-static void print_type_bool(Visitor *v, bool *obj, const char *name,
+static void print_type_bool(Visitor *v, const char *name, bool *obj,
Error **errp)
{
- StringOutputVisitor *sov = DO_UPCAST(StringOutputVisitor, visitor, v);
+ StringOutputVisitor *sov = to_sov(v);
string_output_set(sov, g_strdup(*obj ? "true" : "false"));
}
-static void print_type_str(Visitor *v, char **obj, const char *name,
+static void print_type_str(Visitor *v, const char *name, char **obj,
Error **errp)
{
- StringOutputVisitor *sov = DO_UPCAST(StringOutputVisitor, visitor, v);
- string_output_set(sov, g_strdup(*obj ? *obj : ""));
+ StringOutputVisitor *sov = to_sov(v);
+ char *out;
+
+ if (sov->human) {
+ out = *obj ? g_strdup_printf("\"%s\"", *obj) : g_strdup("<null>");
+ } else {
+ out = g_strdup(*obj ? *obj : "");
+ }
+ string_output_set(sov, out);
}
-static void print_type_number(Visitor *v, double *obj, const char *name,
+static void print_type_number(Visitor *v, const char *name, double *obj,
Error **errp)
{
- StringOutputVisitor *sov = DO_UPCAST(StringOutputVisitor, visitor, v);
+ StringOutputVisitor *sov = to_sov(v);
string_output_set(sov, g_strdup_printf("%f", *obj));
}
-char *string_output_get_string(StringOutputVisitor *sov)
+static void print_type_null(Visitor *v, const char *name, QNull **obj,
+ Error **errp)
+{
+ StringOutputVisitor *sov = to_sov(v);
+ char *out;
+
+ if (sov->human) {
+ out = g_strdup("<null>");
+ } else {
+ out = g_strdup("");
+ }
+ string_output_set(sov, out);
+}
+
+static void
+start_list(Visitor *v, const char *name, GenericList **list, size_t size,
+ Error **errp)
{
- char *string = sov->string;
+ StringOutputVisitor *sov = to_sov(v);
+
+ /* we can't traverse a list in a list */
+ assert(sov->list_mode == LM_NONE);
+ /* We don't support visits without a list */
+ assert(list);
+ sov->list = list;
+ /* List handling is only needed if there are at least two elements */
+ if (*list && (*list)->next) {
+ sov->list_mode = LM_STARTED;
+ }
+}
+
+static GenericList *next_list(Visitor *v, GenericList *tail, size_t size)
+{
+ StringOutputVisitor *sov = to_sov(v);
+ GenericList *ret = tail->next;
+
+ if (ret && !ret->next) {
+ sov->list_mode = LM_END;
+ }
+ return ret;
+}
+
+static void end_list(Visitor *v, void **obj)
+{
+ StringOutputVisitor *sov = to_sov(v);
+
+ assert(sov->list == obj);
+ 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;
+}
+
+static void string_output_complete(Visitor *v, void *opaque)
+{
+ StringOutputVisitor *sov = to_sov(v);
+
+ assert(opaque == sov->result);
+ *sov->result = g_string_free(sov->string, false);
sov->string = NULL;
- return string;
}
-Visitor *string_output_get_visitor(StringOutputVisitor *sov)
+static void free_range(void *range, void *dummy)
{
- return &sov->visitor;
+ g_free(range);
}
-void string_output_visitor_cleanup(StringOutputVisitor *sov)
+static void string_output_free(Visitor *v)
{
- g_free(sov->string);
+ StringOutputVisitor *sov = to_sov(v);
+
+ if (sov->string) {
+ g_string_free(sov->string, true);
+ }
+
+ g_list_foreach(sov->ranges, free_range, NULL);
+ g_list_free(sov->ranges);
g_free(sov);
}
-StringOutputVisitor *string_output_visitor_new(void)
+Visitor *string_output_visitor_new(bool human, char **result)
{
StringOutputVisitor *v;
v = g_malloc0(sizeof(*v));
- v->visitor.type_enum = output_type_enum;
- v->visitor.type_int = print_type_int;
+ v->string = g_string_new(NULL);
+ v->human = human;
+ v->result = result;
+ *result = NULL;
+
+ v->visitor.type = VISITOR_OUTPUT;
+ v->visitor.type_int64 = print_type_int64;
+ v->visitor.type_uint64 = print_type_uint64;
+ v->visitor.type_size = print_type_size;
v->visitor.type_bool = print_type_bool;
v->visitor.type_str = print_type_str;
v->visitor.type_number = print_type_number;
+ v->visitor.type_null = print_type_null;
+ v->visitor.start_list = start_list;
+ v->visitor.next_list = next_list;
+ v->visitor.end_list = end_list;
+ v->visitor.complete = string_output_complete;
+ v->visitor.free = string_output_free;
- return v;
+ return &v->visitor;
}
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