--- /dev/null
+/*
+ * String parsing visitor
+ *
+ * Copyright Red Hat, Inc. 2012
+ *
+ * Author: Paolo Bonzini <pbonzini@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/string-input-visitor.h"
+#include "qapi/visitor-impl.h"
+#include "qapi/qmp/qerror.h"
+#include "qemu/option.h"
+#include "qemu/queue.h"
+#include "qemu/range.h"
+
+
+struct StringInputVisitor
+{
+ Visitor visitor;
+
+ bool head;
+
+ GList *ranges;
+ GList *cur_range;
+ int64_t cur;
+
+ const char *string;
+};
+
+static void free_range(void *range, void *dummy)
+{
+ g_free(range);
+}
+
+static void parse_str(StringInputVisitor *siv, Error **errp)
+{
+ char *str = (char *) siv->string;
+ long long start, end;
+ Range *cur;
+ char *endptr;
+
+ if (siv->ranges) {
+ return;
+ }
+
+ do {
+ errno = 0;
+ start = strtoll(str, &endptr, 0);
+ if (errno == 0 && endptr > str) {
+ if (*endptr == '\0') {
+ cur = g_malloc0(sizeof(*cur));
+ cur->begin = start;
+ cur->end = start + 1;
+ siv->ranges = g_list_insert_sorted_merged(siv->ranges, cur,
+ range_compare);
+ cur = NULL;
+ str = NULL;
+ } else if (*endptr == '-') {
+ str = endptr + 1;
+ errno = 0;
+ end = strtoll(str, &endptr, 0);
+ if (errno == 0 && endptr > str && start <= end &&
+ (start > INT64_MAX - 65536 ||
+ end < start + 65536)) {
+ if (*endptr == '\0') {
+ cur = g_malloc0(sizeof(*cur));
+ cur->begin = start;
+ cur->end = end + 1;
+ siv->ranges =
+ g_list_insert_sorted_merged(siv->ranges,
+ cur,
+ range_compare);
+ cur = NULL;
+ str = NULL;
+ } else if (*endptr == ',') {
+ str = endptr + 1;
+ cur = g_malloc0(sizeof(*cur));
+ cur->begin = start;
+ cur->end = end + 1;
+ siv->ranges =
+ g_list_insert_sorted_merged(siv->ranges,
+ cur,
+ range_compare);
+ cur = NULL;
+ } else {
+ goto error;
+ }
+ } else {
+ goto error;
+ }
+ } else if (*endptr == ',') {
+ str = endptr + 1;
+ cur = g_malloc0(sizeof(*cur));
+ cur->begin = start;
+ cur->end = start + 1;
+ siv->ranges = g_list_insert_sorted_merged(siv->ranges,
+ cur,
+ range_compare);
+ cur = NULL;
+ } else {
+ goto error;
+ }
+ } else {
+ goto error;
+ }
+ } while (str);
+
+ return;
+error:
+ g_list_foreach(siv->ranges, free_range, NULL);
+ g_list_free(siv->ranges);
+ siv->ranges = NULL;
+}
+
+static void
+start_list(Visitor *v, const char *name, Error **errp)
+{
+ StringInputVisitor *siv = DO_UPCAST(StringInputVisitor, visitor, v);
+
+ parse_str(siv, errp);
+
+ siv->cur_range = g_list_first(siv->ranges);
+ if (siv->cur_range) {
+ Range *r = siv->cur_range->data;
+ if (r) {
+ siv->cur = r->begin;
+ }
+ }
+}
+
+static GenericList *
+next_list(Visitor *v, GenericList **list, Error **errp)
+{
+ StringInputVisitor *siv = DO_UPCAST(StringInputVisitor, visitor, v);
+ GenericList **link;
+ Range *r;
+
+ if (!siv->ranges || !siv->cur_range) {
+ return NULL;
+ }
+
+ r = siv->cur_range->data;
+ if (!r) {
+ return NULL;
+ }
+
+ if (siv->cur < r->begin || siv->cur >= r->end) {
+ siv->cur_range = g_list_next(siv->cur_range);
+ if (!siv->cur_range) {
+ return NULL;
+ }
+ r = siv->cur_range->data;
+ if (!r) {
+ return NULL;
+ }
+ siv->cur = r->begin;
+ }
+
+ if (siv->head) {
+ link = list;
+ siv->head = false;
+ } else {
+ link = &(*list)->next;
+ }
+
+ *link = g_malloc0(sizeof **link);
+ return *link;
+}
+
+static void
+end_list(Visitor *v, Error **errp)
+{
+ StringInputVisitor *siv = DO_UPCAST(StringInputVisitor, visitor, v);
+ siv->head = true;
+}
+
+static void parse_type_int(Visitor *v, int64_t *obj, const char *name,
+ Error **errp)
+{
+ StringInputVisitor *siv = DO_UPCAST(StringInputVisitor, visitor, v);
+
+ if (!siv->string) {
+ error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
+ "integer");
+ return;
+ }
+
+ parse_str(siv, errp);
+
+ if (!siv->ranges) {
+ goto error;
+ }
+
+ if (!siv->cur_range) {
+ Range *r;
+
+ siv->cur_range = g_list_first(siv->ranges);
+ if (!siv->cur_range) {
+ goto error;
+ }
+
+ r = siv->cur_range->data;
+ if (!r) {
+ goto error;
+ }
+
+ siv->cur = r->begin;
+ }
+
+ *obj = siv->cur;
+ siv->cur++;
+ return;
+
+error:
+ error_setg(errp, QERR_INVALID_PARAMETER_VALUE, name,
+ "an int64 value or range");
+}
+
+static void parse_type_size(Visitor *v, uint64_t *obj, const char *name,
+ Error **errp)
+{
+ StringInputVisitor *siv = DO_UPCAST(StringInputVisitor, visitor, v);
+ Error *err = NULL;
+ uint64_t val;
+
+ if (siv->string) {
+ parse_option_size(name, siv->string, &val, &err);
+ } else {
+ error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
+ "size");
+ return;
+ }
+ if (err) {
+ error_propagate(errp, err);
+ return;
+ }
+
+ *obj = val;
+}
+
+static void parse_type_bool(Visitor *v, bool *obj, const char *name,
+ Error **errp)
+{
+ StringInputVisitor *siv = DO_UPCAST(StringInputVisitor, visitor, v);
+
+ if (siv->string) {
+ if (!strcasecmp(siv->string, "on") ||
+ !strcasecmp(siv->string, "yes") ||
+ !strcasecmp(siv->string, "true")) {
+ *obj = true;
+ return;
+ }
+ if (!strcasecmp(siv->string, "off") ||
+ !strcasecmp(siv->string, "no") ||
+ !strcasecmp(siv->string, "false")) {
+ *obj = false;
+ return;
+ }
+ }
+
+ error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
+ "boolean");
+}
+
+static void parse_type_str(Visitor *v, char **obj, const char *name,
+ Error **errp)
+{
+ StringInputVisitor *siv = DO_UPCAST(StringInputVisitor, visitor, v);
+ if (siv->string) {
+ *obj = g_strdup(siv->string);
+ } else {
+ error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
+ "string");
+ }
+}
+
+static void parse_type_number(Visitor *v, double *obj, const char *name,
+ Error **errp)
+{
+ StringInputVisitor *siv = DO_UPCAST(StringInputVisitor, visitor, v);
+ char *endp = (char *) siv->string;
+ double val;
+
+ errno = 0;
+ if (siv->string) {
+ val = strtod(siv->string, &endp);
+ }
+ if (!siv->string || errno || endp == siv->string || *endp) {
+ error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
+ "number");
+ return;
+ }
+
+ *obj = val;
+}
+
+static void parse_optional(Visitor *v, bool *present, const char *name,
+ Error **errp)
+{
+ StringInputVisitor *siv = DO_UPCAST(StringInputVisitor, visitor, v);
+
+ if (!siv->string) {
+ *present = false;
+ return;
+ }
+
+ *present = true;
+}
+
+Visitor *string_input_get_visitor(StringInputVisitor *v)
+{
+ return &v->visitor;
+}
+
+void string_input_visitor_cleanup(StringInputVisitor *v)
+{
+ g_list_foreach(v->ranges, free_range, NULL);
+ g_list_free(v->ranges);
+ g_free(v);
+}
+
+StringInputVisitor *string_input_visitor_new(const char *str)
+{
+ StringInputVisitor *v;
+
+ v = g_malloc0(sizeof(*v));
+
+ v->visitor.type_enum = input_type_enum;
+ v->visitor.type_int = parse_type_int;
+ v->visitor.type_size = parse_type_size;
+ v->visitor.type_bool = parse_type_bool;
+ v->visitor.type_str = parse_type_str;
+ v->visitor.type_number = parse_type_number;
+ v->visitor.start_list = start_list;
+ v->visitor.next_list = next_list;
+ v->visitor.end_list = end_list;
+ v->visitor.optional = parse_optional;
+
+ v->string = str;
+ v->head = true;
+ return v;
+}
Code Review / kvmfornfv.git / blobdiff