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correct tree reconstruction using a node stack

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This commit is contained in:
Alexey Fedoseev
2024-01-08 22:37:30 +03:00
parent 084937b479
commit 6258117906
1 changed files with 198 additions and 62 deletions
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256
cyberiadaml.c
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@@ -209,7 +209,6 @@ int cyberiada_init_sm(CyberiadaSM* sm)
sm->version = NULL;
sm->version_len = 0;
sm->nodes = NULL;
sm->start = NULL;
sm->edges = NULL;
}
return CYBERIADA_NO_ERROR;
@@ -336,9 +335,93 @@ const char* debug_state_names[] = {
"Invalid"
};
typedef struct _NodeStack {
const char* xml_element;
CyberiadaNode* node;
struct _NodeStack* next;
} NodeStack;
static int node_stack_push(NodeStack** stack)
{
NodeStack* new_item = (NodeStack*)malloc(sizeof(NodeStack));
new_item->xml_element = NULL;
new_item->node = NULL;
new_item->next = (*stack);
*stack = new_item;
return CYBERIADA_NO_ERROR;
}
static int node_stack_set_top_node(NodeStack** stack, CyberiadaNode* node)
{
NodeStack* to_pop = *stack;
if (to_pop == NULL) {
return CYBERIADA_BAD_PARAMETER;
}
to_pop->node = node;
return CYBERIADA_NO_ERROR;
}
static int node_stack_set_top_element(NodeStack** stack, const char* element)
{
NodeStack* to_pop = *stack;
if (to_pop == NULL) {
return CYBERIADA_BAD_PARAMETER;
}
to_pop->xml_element = element;
return CYBERIADA_NO_ERROR;
}
static CyberiadaNode* node_stack_current_node(NodeStack** stack)
{
NodeStack* s = *stack;
while (s) {
if (s->node)
return s->node;
s = s->next;
}
return NULL;
}
/* static CyberiadaNode* node_stack_parent_node(NodeStack** stack) */
/* { */
/* NodeStack* s = *stack; */
/* int first = 1; */
/* while (s) { */
/* if (s->node) { */
/* if (first) { */
/* first = 0; */
/* } else { */
/* return s->node; */
/* } */
/* } */
/* s = s->next; */
/* } */
/* return NULL; */
/* } */
static int node_stack_pop(NodeStack** stack, CyberiadaNode** node, const char** element)
{
NodeStack* to_pop = *stack;
if (to_pop == NULL) {
return CYBERIADA_BAD_PARAMETER;
}
if (element)
*element = to_pop->xml_element;
if (node)
*node = to_pop->node;
*stack = to_pop->next;
free(to_pop);
return CYBERIADA_NO_ERROR;
}
/* static int node_stack_empty(NodeStack** stack) */
/* { */
/* return *stack == NULL; */
/* } */
static GraphProcessorState handle_new_graph(xmlNode* xml_node,
CyberiadaSM* sm,
CyberiadaNode** current)
NodeStack** stack)
{
CyberiadaNode* node;
char buffer[MAX_STR_LEN];
@@ -349,23 +432,21 @@ static GraphProcessorState handle_new_graph(xmlNode* xml_node,
GRAPHML_ID_ATTRIBUTE) != CYBERIADA_NO_ERROR) {
return gpsInvalid;
}
node = cyberiada_new_node(CYBERIADA_HOLLOW_NODE);
DEBUG("found graph %s \n", buffer);
node = cyberiada_new_node(CYBERIADA_HOLLOW_NODE);
if (sm->nodes == NULL) {
sm->nodes = node;
} else {
(*current)->children = node;
node->parent = *current;
node_stack_set_top_node(stack, node);
}
*current = node;
return gpsGraph;
}
static GraphProcessorState handle_new_node(xmlNode* xml_node,
CyberiadaSM* sm,
CyberiadaNode** current)
NodeStack** stack)
{
CyberiadaNode* node;
CyberiadaNode* parent;
char buffer[MAX_STR_LEN];
size_t buffer_len = sizeof(buffer) - 1;
if (cyberiada_get_attr_value(buffer, buffer_len,
@@ -374,11 +455,12 @@ static GraphProcessorState handle_new_node(xmlNode* xml_node,
return gpsInvalid;
}
DEBUG("found node %s\n", buffer);
if (*current == NULL) {
parent = node_stack_current_node(stack);
if (parent == NULL) {
ERROR("current node invalid\n");
return gpsInvalid;
}
if(strcmp((*current)->id, CYBERIADA_HOLLOW_NODE) == 0) {
/* if(strcmp(current->id, CYBERIADA_HOLLOW_NODE) == 0) {
if (*current == sm->nodes) {
node = cyberiada_new_node(buffer);
(*current)->children = node;
@@ -392,46 +474,69 @@ static GraphProcessorState handle_new_node(xmlNode* xml_node,
node = cyberiada_new_node(buffer);
cyberiada_graph_add_sibling_node(*current, node);
*current = node;
}*/
node = cyberiada_new_node(buffer);
node->parent = parent;
node_stack_set_top_node(stack, node);
if (parent->children == NULL) {
parent->children = node;
} else {
cyberiada_graph_add_sibling_node(parent->children, node);
}
return gpsNode;
}
static GraphProcessorState handle_group_node(xmlNode* xml_node,
CyberiadaSM* sm,
CyberiadaNode** current)
NodeStack** stack)
{
(*current)->type = cybNodeComplex;
CyberiadaNode* current = node_stack_current_node(stack);
if (current == NULL) {
ERROR("current node invalid\n");
return gpsInvalid;
}
current->type = cybNodeComplex;
return gpsNodeGeometry;
}
static GraphProcessorState handle_comment_node(xmlNode* xml_node,
CyberiadaSM* sm,
CyberiadaNode** current)
NodeStack** stack)
{
(*current)->type = cybNodeComment;
cyberiada_copy_string(&((*current)->title), &((*current)->title_len), "COMMENT");
CyberiadaNode* current = node_stack_current_node(stack);
if (current == NULL) {
ERROR("current node invalid\n");
return gpsInvalid;
}
current->type = cybNodeComment;
cyberiada_copy_string(&(current->title), &(current->title_len), "COMMENT");
return gpsNodeGeometry;
}
static GraphProcessorState handle_generic_node(xmlNode* xml_node,
CyberiadaSM* sm,
CyberiadaNode** current)
NodeStack** stack)
{
char buffer[MAX_STR_LEN];
size_t buffer_len = sizeof(buffer) - 1;
CyberiadaNode* current = node_stack_current_node(stack);
if (current == NULL) {
ERROR("current node invalid\n");
return gpsInvalid;
}
if (cyberiada_get_attr_value(buffer, buffer_len,
xml_node,
GRAPHML_YED_NODE_CONFIG_ATTRIBUTE) == CYBERIADA_NO_ERROR &&
(strcmp(buffer, GRAPHML_YED_NODE_CONFIG_START) == 0 ||
strcmp(buffer, GRAPHML_YED_NODE_CONFIG_START2) == 0)) {
(*current)->type = cybNodeInitial;
if ((*current)->title != NULL) {
ERROR("Trying to set start node %s label twice\n", (*current)->id);
current->type = cybNodeInitial;
if (current->title != NULL) {
ERROR("Trying to set start node %s label twice\n", current->id);
return gpsInvalid;
}
cyberiada_copy_string(&((*current)->title), &((*current)->title_len), "");
cyberiada_copy_string(&(current->title), &(current->title_len), "");
} else {
(*current)->type = cybNodeSimple;
current->type = cybNodeSimple;
}
return gpsNodeGeometry;
}
@@ -473,18 +578,24 @@ static int cyberiada_xml_read_rect(xmlNode* xml_node,
static GraphProcessorState handle_node_geometry(xmlNode* xml_node,
CyberiadaSM* sm,
CyberiadaNode** current)
NodeStack** stack)
{
CyberiadaNodeType type = (*current)->type;
CyberiadaNodeType type;
CyberiadaNode* current = node_stack_current_node(stack);
if (current == NULL) {
ERROR("current node invalid\n");
return gpsInvalid;
}
type = current->type;
if (cyberiada_xml_read_rect(xml_node,
&((*current)->geometry_rect)) != CYBERIADA_NO_ERROR) {
&(current->geometry_rect)) != CYBERIADA_NO_ERROR) {
return gpsInvalid;
}
if (type == cybNodeInitial) {
(*current)->geometry_rect.x += (*current)->geometry_rect.width / 2.0;
(*current)->geometry_rect.y += (*current)->geometry_rect.height / 2.0;
(*current)->geometry_rect.width = 0.0;
(*current)->geometry_rect.height = 0.0;
current->geometry_rect.x += current->geometry_rect.width / 2.0;
current->geometry_rect.y += current->geometry_rect.height / 2.0;
current->geometry_rect.width = 0.0;
current->geometry_rect.height = 0.0;
return gpsNodeStart;
} else if (type == cybNodeComment) {
return gpsNodeAction;
@@ -495,7 +606,7 @@ static GraphProcessorState handle_node_geometry(xmlNode* xml_node,
static GraphProcessorState handle_property(xmlNode* xml_node,
CyberiadaSM* sm,
CyberiadaNode** current)
NodeStack** stack)
{
char buffer[MAX_STR_LEN];
size_t buffer_len = sizeof(buffer) - 1;
@@ -512,39 +623,49 @@ static GraphProcessorState handle_property(xmlNode* xml_node,
static GraphProcessorState handle_node_title(xmlNode* xml_node,
CyberiadaSM* sm,
CyberiadaNode** current)
NodeStack** stack)
{
char buffer[MAX_STR_LEN];
size_t buffer_len = sizeof(buffer) - 1;
if ((*current)->title != NULL) {
ERROR("Trying to set node %s label twice\n", (*current)->id);
CyberiadaNode* current = node_stack_current_node(stack);
if (current == NULL) {
ERROR("current node invalid\n");
return gpsInvalid;
}
if (current->title != NULL) {
ERROR("Trying to set node %s label twice\n", current->id);
return gpsInvalid;
}
cyberiada_get_element_text(buffer, buffer_len, xml_node);
DEBUG("Set node %s title %s\n", (*current)->id, buffer);
cyberiada_copy_string(&((*current)->title), &((*current)->title_len), buffer);
DEBUG("Set node %s title %s\n", current->id, buffer);
cyberiada_copy_string(&(current->title), &(current->title_len), buffer);
return gpsNodeAction;
}
static GraphProcessorState handle_node_action(xmlNode* xml_node,
CyberiadaSM* sm,
CyberiadaNode** current)
NodeStack** stack)
{
char buffer[MAX_STR_LEN];
size_t buffer_len = sizeof(buffer) - 1;
if ((*current)->action != NULL) {
ERROR("Trying to set node %s action twice\n", (*current)->id);
CyberiadaNode* current = node_stack_current_node(stack);
if (current == NULL) {
ERROR("current node invalid\n");
return gpsInvalid;
}
if (current->action != NULL) {
ERROR("Trying to set node %s action twice\n", current->id);
return gpsInvalid;
}
cyberiada_get_element_text(buffer, buffer_len, xml_node);
DEBUG("Set node %s action %s\n", (*current)->id, buffer);
cyberiada_copy_string(&((*current)->action), &((*current)->action_len), buffer);
DEBUG("Set node %s action %s\n", current->id, buffer);
cyberiada_copy_string(&(current->action), &(current->action_len), buffer);
return gpsGraph;
}
static GraphProcessorState handle_new_edge(xmlNode* xml_node,
CyberiadaSM* sm,
CyberiadaNode** node)
NodeStack** stack)
{
CyberiadaNode* source = NULL;
CyberiadaNode* target = NULL;
@@ -581,7 +702,7 @@ static GraphProcessorState handle_new_edge(xmlNode* xml_node,
static GraphProcessorState handle_edge_geometry(xmlNode* xml_node,
CyberiadaSM* sm,
CyberiadaNode** node)
NodeStack** stack)
{
CyberiadaEdge *current = cyberiada_graph_find_last_edge(sm);
if (current == NULL) {
@@ -607,7 +728,7 @@ static GraphProcessorState handle_edge_geometry(xmlNode* xml_node,
static GraphProcessorState handle_edge_point(xmlNode* xml_node,
CyberiadaSM* sm,
CyberiadaNode** node)
NodeStack** stack)
{
CyberiadaEdge *current = cyberiada_graph_find_last_edge(sm);
double x, y;
@@ -640,7 +761,7 @@ static GraphProcessorState handle_edge_point(xmlNode* xml_node,
static GraphProcessorState handle_edge_label(xmlNode* xml_node,
CyberiadaSM* sm,
CyberiadaNode** node)
NodeStack** stack)
{
char buffer[MAX_STR_LEN];
size_t buffer_len = sizeof(buffer) - 1;
@@ -664,7 +785,7 @@ static GraphProcessorState handle_edge_label(xmlNode* xml_node,
typedef GraphProcessorState (*Handler)(xmlNode* xml_root,
CyberiadaSM* sm,
CyberiadaNode** current);
NodeStack** stack);
typedef struct {
GraphProcessorState state;
@@ -695,14 +816,16 @@ const size_t processor_state_table_size = sizeof(processor_state_table) / sizeof
static int dispatch_processor(xmlNode* xml_node,
CyberiadaSM* sm,
CyberiadaNode** current,
NodeStack** stack,
GraphProcessorState* gps) {
size_t i;
if (xml_node->type == XML_ELEMENT_NODE) {
const char* xml_element_name = (const char*)xml_node->name;
node_stack_set_top_element(stack, xml_element_name);
for (i = 0; i < processor_state_table_size; i++) {
if (processor_state_table[i].state == *gps &&
strcmp((const char*)xml_node->name, processor_state_table[i].symbol) == 0) {
*gps = (*(processor_state_table[i].handler))(xml_node, sm, current);
strcmp(xml_element_name, processor_state_table[i].symbol) == 0) {
*gps = (*(processor_state_table[i].handler))(xml_node, sm, stack);
return CYBERIADA_NO_ERROR;
}
}
@@ -712,26 +835,36 @@ static int dispatch_processor(xmlNode* xml_node,
static int cyberiada_build_graph(xmlNode* xml_root,
CyberiadaSM* sm,
CyberiadaNode** current,
NodeStack** stack,
GraphProcessorState* gps)
{
xmlNode *cur_xml_node = NULL;
/* NodeStack* s = *stack; */
/* DEBUG("\nStack:"); */
/* while (s) { */
/* DEBUG(" (%s %p)", */
/* s->xml_element ? s->xml_element : "null", */
/* s->node); */
/* s = s->next; */
/* } */
/* DEBUG("\n"); */
for (cur_xml_node = xml_root; cur_xml_node; cur_xml_node = cur_xml_node->next) {
DEBUG("xml node %s sm root %s current %s gps %s\n",
DEBUG("xml node %s sm root %s gps %s\n",
cur_xml_node->name,
sm->nodes ? sm->nodes->id : "none",
*current ? (*current)->id : "none",
debug_state_names[*gps]);
dispatch_processor(cur_xml_node, sm, current, gps);
node_stack_push(stack);
dispatch_processor(cur_xml_node, sm, stack, gps);
if (*gps == gpsInvalid) {
return CYBERIADA_FORMAT_ERROR;
}
if (cur_xml_node->children) {
int res = cyberiada_build_graph(cur_xml_node->children, sm, current, gps);
int res = cyberiada_build_graph(cur_xml_node->children, sm, stack, gps);
if (res != CYBERIADA_NO_ERROR) {
return res;
}
}
node_stack_pop(stack, NULL, NULL);
}
return CYBERIADA_NO_ERROR;
}
@@ -741,12 +874,18 @@ static int cyberiada_decode_yed_xml(xmlNode* root, CyberiadaSM* sm)
char buffer[MAX_STR_LEN];
size_t buffer_len = sizeof(buffer) - 1;
GraphProcessorState gps = gpsInit;
CyberiadaNode* current = NULL;
NodeStack* stack = NULL;
int res;
if ((res = cyberiada_build_graph(root, sm, &current, &gps)) != CYBERIADA_NO_ERROR) {
if ((res = cyberiada_build_graph(root, sm, &stack, &gps)) != CYBERIADA_NO_ERROR) {
return res;
}
if (stack != NULL) {
fprintf(stderr, "error with node stack\n");
return CYBERIADA_FORMAT_ERROR;
}
if (cyberiada_get_attr_value(buffer, buffer_len,
root,
GRAPHML_BERLOGA_SCHEMENAME_ATTR) != CYBERIADA_NO_ERROR) {
@@ -842,7 +981,7 @@ int cyberiada_read_sm(CyberiadaSM* sm, const char* filename, CyberiadaXMLFormat
return res;
}
static int cyberiada_print_node(CyberiadaNode* node, CyberiadaNode* start, int level)
static int cyberiada_print_node(CyberiadaNode* node, int level)
{
CyberiadaNode* cur_node;
char levelspace[16];
@@ -856,9 +995,6 @@ static int cyberiada_print_node(CyberiadaNode* node, CyberiadaNode* start, int l
printf("%sNode {id: %s, title: \"%s\", type: %d",
levelspace, node->id, node->title, (int)node->type);
if (node == start) {
printf(", S");
}
printf("}\n");
printf("%sGeometry: (%lf, %lf, %lf, %lf)\n",
levelspace,
@@ -874,7 +1010,7 @@ static int cyberiada_print_node(CyberiadaNode* node, CyberiadaNode* start, int l
printf("%sChildren:\n", levelspace);
for (cur_node = node->children; cur_node; cur_node = cur_node->next) {
cyberiada_print_node(cur_node, start, level + 1);
cyberiada_print_node(cur_node, level + 1);
}
return CYBERIADA_NO_ERROR;
@@ -921,7 +1057,7 @@ int cyberiada_print_sm(CyberiadaSM* sm)
printf("Nodes:\n");
for (cur_node = sm->nodes; cur_node; cur_node = cur_node->next) {
cyberiada_print_node(cur_node, sm->start, 0);
cyberiada_print_node(cur_node, 0);
}
printf("\n");