// SPDX-License-Identifier: GPL-2.0-only
#include <ctype.h>
#include <string.h>
#include "common/nodename.h"

char *
nodename(xmlNode *node, char *buf, int len)
{
	if (!node || !node->name) {
		return NULL;
	}

	/* Ignore superfluous 'text.' in node name */
	if (node->parent && !strcmp((char *)node->name, "text")) {
		node = node->parent;
	}

	char *p = buf;
	p[--len] = 0;
	for (;;) {
		const char *name = (char *)node->name;
		char c;
		while ((c = *name++) != 0) {
			*p++ = tolower(c);
			if (!--len) {
				return buf;
			}
		}
		*p = 0;
		node = node->parent;
		if (!node || !node->name) {
			return buf;
		}
		*p++ = '.';
		if (!--len) {
			return buf;
		}
	}
}