mrb_value
mrb_yaml_dump(mrb_state *mrb, mrb_value self)
{
yaml_emitter_t emitter;
yaml_document_t document;
mrb_value root;
yaml_write_data_t write_data;
/* Extract arguments */
mrb_get_args(mrb, "o", &root);
/* Build the document */
yaml_document_initialize(&document, NULL, NULL, NULL, 0, 0);
value_to_node(mrb, &document, root);
/* Initialize the emitter */
yaml_emitter_initialize(&emitter);
write_data.mrb = mrb;
write_data.str = mrb_str_new(mrb, NULL, 0);
yaml_emitter_set_output(&emitter, &yaml_write_handler, &write_data);
/* Dump the document */
yaml_emitter_open(&emitter);
yaml_emitter_dump(&emitter, &document);
yaml_emitter_close(&emitter);
/* Clean up */
yaml_emitter_delete(&emitter);
yaml_document_delete(&document);
return write_data.str;
}
/*
* COMMAND: <gda_report_expr>
*
* Creates a text node containing the evaluation of the textual contents of the node
*
* uses node's contents: yes
* requested attributes: none
*/
static gboolean
command_gda_report_eval_expr (GdaReportEngine *engine, xmlNodePtr node, GSList **created_nodes,
RunContext *context, GError **error)
{
GValue *value;
xmlNodePtr child;
value = evaluate_expression (engine, context,
(const gchar *) xmlNodeGetContent (node), error);
if (!value)
return FALSE;
child = value_to_node (engine, context, value, NULL);
*created_nodes = g_slist_prepend (NULL, child);
return TRUE;
}
/*
* COMMAND: <gda_report_param_value>
*
* Creates a new text node containing the value of the parameter named from "param_name"
*
* uses node's contents: no
* requested attributes: param_name
* optional attributes: converter => use "richtext::docbook"
*/
static gboolean
command_gda_report_param_value (GdaReportEngine *engine, xmlNodePtr node, GSList **created_nodes,
RunContext *context, GError **error)
{
xmlChar *prop;
prop = xmlGetProp (node, BAD_CAST "param_name");
if (prop) {
GdaHolder *param;
param = run_context_find_param (engine, context, prop);
if (!param) {
g_set_error (error, 0, 0,
_("Unknown parameter '%s'"), prop);
return FALSE;
}
else {
/* Add a text node */
const GValue *value;
xmlNodePtr child;
GdaSet *options = NULL;
xmlChar *cprop;
cprop = xmlGetProp (node, BAD_CAST "converter");
if (cprop) {
options = gda_set_new_inline (1, "converter", G_TYPE_STRING, (gchar*) cprop);
xmlFree (cprop);
}
value = gda_holder_get_value (param);
child = value_to_node (engine, context, value, options);
if (options)
g_object_unref (options);
*created_nodes = g_slist_prepend (NULL, child);
}
xmlFree (prop);
return TRUE;
}
else {
g_set_error (error, 0, 0, "%s",
_("Parameter name not specified"));
return FALSE;
}
}
int value_to_node(mrb_state *mrb,
yaml_document_t *document, mrb_value value)
{
int node;
switch (mrb_type(value))
{
case MRB_TT_ARRAY:
{
mrb_int len = mrb_ary_len(mrb, value);
mrb_int i;
int ai = mrb_gc_arena_save(mrb);
node = yaml_document_add_sequence(document, NULL,
YAML_ANY_SEQUENCE_STYLE);
for (i = 0; i < len; i++)
{
mrb_value child = mrb_ary_ref(mrb, value, i);
int child_node = value_to_node(mrb, document, child);
/* Add the child to the sequence */
yaml_document_append_sequence_item(document, node, child_node);
mrb_gc_arena_restore(mrb, ai);
}
break;
}
case MRB_TT_HASH:
{
/* Iterating a list of keys is slow, but it only
* requires use of the interface defined in `hash.h`.
*/
mrb_value keys = mrb_hash_keys(mrb, value);
mrb_int len = mrb_ary_len(mrb, keys);
mrb_int i;
int ai = mrb_gc_arena_save(mrb);
node = yaml_document_add_mapping(document, NULL,
YAML_ANY_MAPPING_STYLE);
for (i = 0; i < len; i++)
{
mrb_value key = mrb_ary_ref(mrb, keys, i);
mrb_value child = mrb_hash_get(mrb, value, key);
int key_node = value_to_node(mrb, document, key);
int child_node = value_to_node(mrb, document, child);
/* Add the key/value pair to the mapping */
yaml_document_append_mapping_pair(document, node,
key_node, child_node);
mrb_gc_arena_restore(mrb, ai);
}
break;
}
default:
{
if (mrb_nil_p(value)) {
/* http://yaml.org/type/null.html
Canonical form */
value = mrb_str_new_lit(mrb, "~");
} else {
/* Equivalent to `obj = obj#to_s` */
value = mrb_obj_as_string(mrb, value);
}
/* Fallthrough */
}
case MRB_TT_STRING:
{
yaml_scalar_style_t style = YAML_ANY_SCALAR_STYLE;
if (RSTRING_LEN(value) == 0) {
/* If the String is empty, it may be reloaded as a nil instead of an
* empty string, to avoid that place a quoted string instead */
style = YAML_SINGLE_QUOTED_SCALAR_STYLE;
}
yaml_char_t *value_chars = (unsigned char *) RSTRING_PTR(value);
node = yaml_document_add_scalar(document, NULL,
value_chars, RSTRING_LEN(value), style);
break;
}
}
return node;
}
