/* $Name$ */
#include "gedcom_internal.h"
+#include "gedcom.h"
+#include "gedcom.tabgen.h"
#include "xref.h"
#include "hash.h"
struct xref_value def_xref_val = { XREF_NONE, "<error>", NULL };
static hash_t *xrefs = NULL;
-char* xref_type_str[] = { N_("nothing"),
- N_("a family"),
- N_("an individual"),
- N_("a note"),
- N_("a multimedia object"),
- N_("a source repository"),
- N_("a source"),
- N_("a submitter"),
- N_("a submission record"),
- N_("an application-specific record"),
- };
+const char* xref_type_str[] = { N_("nothing"),
+ N_("a family"),
+ N_("an individual"),
+ N_("a note"),
+ N_("a multimedia object"),
+ N_("a source repository"),
+ N_("a source"),
+ N_("a submitter"),
+ N_("a submission record"),
+ N_("an application-specific record"),
+ };
struct xref_node {
struct xref_value xref;
Xref_type used_type;
int defined_line;
int used_line;
+ int use_count;
};
-hnode_t *xref_alloc(void *c __attribute__((unused)))
+hnode_t *xref_alloc(void *c UNUSED)
{
return malloc(sizeof *xref_alloc(NULL));
}
-void xref_free(hnode_t *n, void *c __attribute__((unused)))
+void xref_free(hnode_t *n, void *c UNUSED)
{
struct xref_node *xr = (struct xref_node *)hnode_get(n);
free((void*)hnode_getkey(n));
/* Make sure that the 'string' member always contains a valid string */
if (!xr->xref.string)
xr->xref.string = strdup("");
+ if (!xr->xref.string) MEMORY_ERROR;
xr->xref.object = NULL;
xr->defined_type = XREF_NONE;
xr->used_type = XREF_NONE;
xr->defined_line = -1;
xr->used_line = -1;
+ xr->use_count = 0;
}
struct xref_node *make_xref_node()
{
struct xref_node *xr = (struct xref_node *)malloc(sizeof(struct xref_node));
- xr->xref.string = NULL;
- clear_xref_node(xr);
+ if (xr) {
+ xr->xref.string = NULL;
+ clear_xref_node(xr);
+ }
+ else
+ MEMORY_ERROR;
return xr;
}
+void delete_xref_node(struct xref_node* xr)
+{
+ if (!xr->xref.string)
+ free(xr->xref.string);
+ free(xr);
+}
+
void cleanup_xrefs()
{
hash_free(xrefs);
else
/* Only register initially (if xrefs is still NULL) */
/* So that it is only registered once */
- atexit(cleanup_xrefs);
+ if (atexit(cleanup_xrefs) != 0) {
+ gedcom_warning(_("Could not register xref cleanup function"));
+ }
xrefs = hash_create(HASHCOUNT_T_MAX, NULL, NULL);
hash_set_allocator(xrefs, xref_alloc, xref_free, NULL);
}
return result;
}
-struct xref_value *gedcom_get_by_xref(char *key)
+struct xref_node* add_xref(Xref_type xref_type, const char* xrefstr,
+ Gedcom_ctxt object)
{
- hnode_t *node = hash_lookup(xrefs, key);
- if (node) {
- struct xref_node *xr = (struct xref_node *)hnode_get(node);
- return &(xr->xref);
+ struct xref_node *xr = NULL;
+ char *key = strdup(xrefstr);
+ if (key) {
+ xr = make_xref_node();
+ xr->xref.type = xref_type;
+ xr->xref.object = object;
+ if (xr->xref.string)
+ free(xr->xref.string);
+ xr->xref.string = strdup(xrefstr);
+ if (! xr->xref.string) {
+ MEMORY_ERROR;
+ free(key);
+ delete_xref_node(xr);
+ xr = NULL;
+ }
+ else {
+ hash_alloc_insert(xrefs, key, xr);
+ }
}
else
- return NULL;
+ MEMORY_ERROR;
+ return xr;
+}
+
+void remove_xref(struct xref_node* xr)
+{
+ hnode_t *node = hash_lookup(xrefs, xr->xref.string);
+ hash_delete_free(xrefs, node);
}
-struct xref_value *gedcom_parse_xref(char *raw_value,
+int set_xref_fields(struct xref_node* xr, Xref_ctxt ctxt, Xref_type xref_type)
+{
+ int result = 0;
+
+ if (xr->defined_type != XREF_NONE && xr->defined_type != xref_type &&
+ xr->defined_type != XREF_ANY) {
+ if (xr->defined_line != 0)
+ gedcom_error(_("Cross-reference %s previously defined as pointer to %s, "
+ "on line %d"),
+ xr->xref.string, xref_type_str[xr->defined_type],
+ xr->defined_line);
+ else
+ gedcom_error(_("Cross-reference %s previously defined as pointer to %s"),
+ xr->xref.string, xref_type_str[xr->defined_type]);
+
+ result = 1;
+ }
+ else if (xr->used_type != XREF_NONE && xr->used_type != xref_type) {
+ if (xr->used_line != 0)
+ gedcom_error(_("Cross-reference %s previously used as pointer to %s, "
+ "on line %d"),
+ xr->xref.string, xref_type_str[xr->used_type],
+ xr->used_line);
+ else
+ gedcom_error(_("Cross-reference %s previously used as pointer to %s"),
+ xr->xref.string, xref_type_str[xr->used_type]);
+
+ result = 1;
+ }
+
+ if (result == 0) {
+ if (ctxt == XREF_USED)
+ xr->use_count++;
+ if (ctxt == XREF_DEFINED && xr->defined_type == XREF_NONE) {
+ xr->defined_type = xref_type;
+ xr->defined_line = line_no;
+ }
+ else if (ctxt == XREF_USED && xr->used_type == XREF_NONE) {
+ xr->used_type = xref_type;
+ xr->used_line = line_no;
+ }
+ }
+
+ return result;
+}
+
+struct xref_value *gedcom_parse_xref(const char *raw_value,
Xref_ctxt ctxt, Xref_type xref_type)
{
struct xref_node *xr = NULL;
xr = (struct xref_node *)hnode_get(node);
}
else {
- char *key = strdup(raw_value);
- xr = make_xref_node();
- xr->xref.type = xref_type;
- free(xr->xref.string);
- xr->xref.string = strdup(raw_value);
- hash_alloc_insert(xrefs, key, xr);
+ xr = add_xref(xref_type, raw_value, NULL);
}
-
- if (ctxt == XREF_DEFINED && xr->defined_type == XREF_NONE) {
- xr->defined_type = xref_type;
- xr->defined_line = line_no;
+
+ if (xr) {
+ set_xref_fields(xr, ctxt, xref_type);
+ return &(xr->xref);
}
- else if (ctxt == XREF_USED && xr->used_type == XREF_NONE) {
- xr->used_type = xref_type;
- xr->used_line = line_no;
+ else
+ return NULL;
+}
+
+/* Functions for retrieving, modifying and deleting cross-references */
+
+int is_valid_pointer(const char *key)
+{
+ return (strlen(key) <= 22 &&
+ gedcom_check_token(key, STATE_NORMAL, POINTER) == 0);
+}
+
+struct xref_value* gedcom_get_by_xref(const char *key)
+{
+ if (!is_valid_pointer(key)) {
+ gedcom_error(_("String '%s' is not a valid cross-reference key"), key);
+ return NULL;
}
-
- if ((ctxt == XREF_DEFINED && xr->defined_type != xref_type &&
- xr->defined_type != XREF_ANY)
- || (ctxt == XREF_USED &&
- (xr->defined_type != XREF_NONE && xr->defined_type != xref_type &&
- xr->defined_type != XREF_ANY))) {
- gedcom_error(_("Cross-reference %s previously defined as pointer to %s, "
- "on line %d"),
- xr->xref.string, xref_type_str[xr->defined_type],
- xr->defined_line);
- clear_xref_node(xr);
- }
- else if ((ctxt == XREF_USED && xr->used_type != xref_type)
- || (ctxt == XREF_DEFINED &&
- (xr->used_type != XREF_NONE && xr->used_type != xref_type))) {
- gedcom_error(_("Cross-reference %s previously used as pointer to %s, "
- "on line %d"),
- xr->xref.string, xref_type_str[xr->used_type], xr->used_line);
- clear_xref_node(xr);
+ else {
+ hnode_t *node = hash_lookup(xrefs, key);
+ if (node) {
+ struct xref_node *xr = (struct xref_node *)hnode_get(node);
+ return &(xr->xref);
+ }
+ else
+ return NULL;
}
-
- return &(xr->xref);
+}
+
+struct xref_value* gedcom_add_xref(Xref_type type, const char* xrefstr,
+ Gedcom_ctxt object)
+{
+ struct xref_node *xr = NULL;
+
+ if (!is_valid_pointer(xrefstr)) {
+ gedcom_error(_("String '%s' is not a valid cross-reference key"), xrefstr);
+ }
+ else {
+ hnode_t *node = hash_lookup(xrefs, xrefstr);
+ if (node) {
+ gedcom_error(_("Cross-reference %s already exists"), xrefstr);
+ }
+ else {
+ xr = add_xref(type, xrefstr, object);
+ if (xr)
+ set_xref_fields(xr, XREF_DEFINED, type);
+ }
+ }
+ if (xr)
+ return &(xr->xref);
+ else
+ return NULL;
+}
+
+struct xref_value* gedcom_link_xref(Xref_type type, const char* xrefstr)
+{
+ struct xref_node *xr = NULL;
+
+ if (!is_valid_pointer(xrefstr)) {
+ gedcom_error(_("String '%s' is not a valid cross-reference key"), xrefstr);
+ }
+ else {
+ hnode_t *node = hash_lookup(xrefs, xrefstr);
+ if (!node) {
+ gedcom_error(_("Cross-reference %s not defined"), xrefstr);
+ }
+ else {
+ xr = (struct xref_node *)hnode_get(node);
+ if (set_xref_fields(xr, XREF_USED, type) != 0)
+ xr = NULL;
+ }
+ }
+
+ if (xr)
+ return &(xr->xref);
+ else
+ return NULL;
+}
+
+struct xref_value* gedcom_unlink_xref(Xref_type type, const char* xrefstr)
+{
+ struct xref_node *xr = NULL;
+ if (!is_valid_pointer(xrefstr)) {
+ gedcom_error(_("String '%s' is not a valid cross-reference key"), xrefstr);
+ }
+ else {
+ hnode_t *node = hash_lookup(xrefs, xrefstr);
+ if (! node) {
+ gedcom_error(_("Cross-reference %s not defined"), xrefstr);
+ }
+ else {
+ xr = (struct xref_node*) hnode_get(node);
+ if (xr->defined_type != type && xr->defined_type != XREF_ANY) {
+ gedcom_error
+ (_("Cross-reference %s previously defined as pointer to %s"),
+ xr->xref.string, xref_type_str[xr->defined_type]);
+ xr = NULL;
+ }
+ else
+ xr->use_count--;
+ }
+ }
+ if (xr)
+ return &(xr->xref);
+ else
+ return NULL;
+}
+
+int gedcom_delete_xref(const char* xrefstr)
+{
+ struct xref_node *xr = NULL;
+ int result = 1;
+
+ if (!is_valid_pointer(xrefstr)) {
+ gedcom_error(_("String '%s' is not a valid cross-reference key"), xrefstr);
+ }
+ else {
+ hnode_t *node = hash_lookup(xrefs, xrefstr);
+ if (! node) {
+ gedcom_error(_("Cross-reference %s not defined"), xrefstr);
+ }
+ else {
+ xr = (struct xref_node*) hnode_get(node);
+ if (xr->use_count != 0) {
+ gedcom_error(_("Cross-reference %s still in use"), xrefstr);
+ }
+ else {
+ remove_xref(xr);
+ result = 0;
+ }
+ }
+ }
+ return result;
}
projects / gedcom-parse.git / blobdiff