Move all the XML documentation API from pbx.c to xmldoc.c.

Export the XML documentation API:
   ast_xmldoc_build_synopsis()
   ast_xmldoc_build_syntax()
   ast_xmldoc_build_description()
   ast_xmldoc_build_seealso()
   ast_xmldoc_build_arguments()
   ast_xmldoc_printable()
   ast_xmldoc_load_documentation()



git-svn-id: http://svn.digium.com/svn/asterisk/trunk@155711 f38db490-d61c-443f-a65b-d21fe96a405b

1 files changed, 1621 insertions, 0 deletions

diff --git a/main/xmldoc.c b/main/xmldoc.c
new file mode 100644
index 000000000..c24a6b7a5
--- /dev/null
+++ b/main/xmldoc.c
@@ -0,0 +1,1621 @@
+/*
+ * Asterisk -- An open source telephony toolkit.
+ *
+ * Copyright (C) 2008, Eliel C. Sardanons (LU1ALY) <eliels@gmail.com>
+ *
+ * See http://www.asterisk.org for more information about
+ * the Asterisk project. Please do not directly contact
+ * any of the maintainers of this project for assistance;
+ * the project provides a web site, mailing lists and IRC
+ * channels for your use.
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License Version 2. See the LICENSE file
+ * at the top of the source tree.
+ */
+
+/*! \file
+ *
+ * \brief XML Documentation API
+ *
+ * \author Eliel C. Sardanons (LU1ALY) <eliels@gmail.com>
+ */
+
+#include "asterisk.h"
+
+ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
+
+#include "asterisk/_private.h"
+#include "asterisk/paths.h"
+#include "asterisk/linkedlists.h"
+#include "asterisk/strings.h"
+#include "asterisk/config.h"
+#include "asterisk/term.h"
+#include "asterisk/xmldoc.h"
+
+#ifdef AST_XML_DOCS
+
+/*! \brief Default documentation language. */
+static const char default_documentation_language[] = "en_US";
+
+/*! \brief Number of columns to print when showing the XML documentation with a 
+ *         'core show application/function *' CLI command. Used in text wrapping.*/
+static const int xmldoc_text_columns = 74;
+
+/*! \brief This is a value that we will use to let the wrapping mechanism move the cursor
+ *         backward and forward xmldoc_max_diff positions before cutting the middle of a
+ *         word, trying to find a space or a \n. */
+static const int xmldoc_max_diff = 5;
+
+/*! \brief XML documentation language. */
+static char documentation_language[6];
+
+/*! \brief XML documentation tree */
+struct documentation_tree {
+	char *filename;					/*!< XML document filename. */
+	struct ast_xml_doc *doc;			/*!< Open document pointer. */
+	AST_RWLIST_ENTRY(documentation_tree) entry;
+};
+
+/*!
+ * \brief Container of documentation trees
+ *
+ * \note A RWLIST is a sufficient container type to use here for now.
+ *       However, some changes will need to be made to implement ref counting
+ *       if reload support is added in the future.
+ */
+static AST_RWLIST_HEAD_STATIC(xmldoc_tree, documentation_tree);
+
+static const struct strcolorized_tags {
+	const char *init;      /*!< Replace initial tag with this string. */
+	const char *end;       /*!< Replace end tag with this string. */
+	const int colorfg;     /*!< Foreground color. */
+	const char *inittag;   /*!< Initial tag description. */
+	const char *endtag;    /*!< Ending tag description. */
+} colorized_tags[] = {
+	{ "<",  ">",  COLOR_GREEN,  "<replaceable>", "</replaceable>" },
+	{ "\'", "\'", COLOR_BLUE,   "<literal>",     "</literal>" },
+	{ "*",  "*",  COLOR_RED,    "<emphasis>",    "</emphasis>" },
+	{ "\"", "\"", COLOR_YELLOW, "<filename>",    "</filename>" },
+	{ "\"", "\"", COLOR_CYAN,   "<directory>",   "</directory>" },
+	{ "${", "}",  COLOR_GREEN,  "<variable>",    "</variable>" },
+	{ "",   "",   COLOR_BLUE,   "<value>",       "</value>" },
+	{ "",   "",   COLOR_BLUE,   "<enum>",        "</enum>" },
+	{ "\'", "\'", COLOR_GRAY,   "<astcli>",      "</astcli>" },
+
+	/* Special tags */
+	{ "", "", COLOR_YELLOW, "<note>",   "</note>" },
+	{ "", "", COLOR_RED,   "<warning>", "</warning>" }
+};
+
+static const struct strspecial_tags {
+	const char *tagname;		/*!< Special tag name. */
+	const char *init;		/*!< Print this at the beginning. */
+	const char *end;		/*!< Print this at the end. */
+} special_tags[] = {
+	{ "note",    "<note>NOTE:</note> ",             "" },
+	{ "warning", "<warning>WARNING!!!:</warning> ", "" }
+};
+
+/*! \internal
+ *  \brief Calculate the space in bytes used by a format string
+ *         that will be passed to a sprintf function.
+ *  \param postbr The format string to use to calculate the length.
+ *  \retval The postbr length.
+ */
+static int xmldoc_postbrlen(const char *postbr)
+{
+	int postbrreallen = 0, i;
+	size_t postbrlen;
+
+	if (!postbr) {
+		return 0;
+	}
+	postbrlen = strlen(postbr);
+	for (i = 0; i < postbrlen; i++) {
+		if (postbr[i] == '\t') {
+			postbrreallen += 8 - (postbrreallen % 8);
+		} else {
+			postbrreallen++;
+		}
+	}
+	return postbrreallen;
+}
+
+/*! \internal
+ *  \brief Setup postbr to be used while wrapping the text.
+ *         Add to postbr array all the spaces and tabs at the beginning of text.
+ *  \param postbr output array.
+ *  \param len text array length.
+ *  \param text Text with format string before the actual string.
+ */
+static void xmldoc_setpostbr(char *postbr, size_t len, const char *text)
+{
+	int c, postbrlen = 0;
+
+	if (!text) {
+		return;
+	}
+
+	for (c = 0; c < len; c++) {
+		if (text[c] == '\t' || text[c] == ' ') {
+			postbr[postbrlen++] = text[c];
+		} else {
+			break;
+		}
+	}
+	postbr[postbrlen] = '\0';
+}
+
+/*! \internal
+ *  \brief Try to find a space or a break in text starting at currentpost
+ *         and moving at most maxdiff positions.
+ *         Helper for xmldoc_string_wrap().
+ *  \param text Input string where it will search.
+ *  \param currentpos Current position within text.
+ *  \param maxdiff Not move more than maxdiff inside text.
+ *  \retval 1 if a space or break is found inside text while moving.
+ *  \retval 0 if no space or break is found.
+ */
+static int xmldoc_wait_nextspace(const char *text, int currentpos, int maxdiff)
+{
+	int i, textlen;
+
+	if (!text) {
+		return 0;
+	}
+
+	textlen = strlen(text);
+	for (i = currentpos; i < textlen; i++) {
+		if (text[i] == ESC) {
+			/* Move to the end of the escape sequence */
+			while (i < textlen && text[i] != 'm') {
+				i++;
+			}
+		} else if (text[i] == ' ' || text[i] == '\n') {
+			/* Found the next space or linefeed */
+			return 1;
+		} else if (i - currentpos > maxdiff) {
+			/* We have looked the max distance and didn't find it */
+			return 0;
+		}
+	}
+
+	/* Reached the end and did not find it */
+
+	return 0;
+}
+
+/*! \internal
+ *  \brief Helper function for xmldoc_string_wrap().
+ *	   Try to found a space or a break inside text moving backward
+ *	   not more than maxdiff positions.
+ *  \param text The input string where to search for a space.
+ *  \param currentpos The current cursor position.
+ *  \param maxdiff The max number of positions to move within text.
+ *  \retval 0 If no space is found (Notice that text[currentpos] is not a space or a break)
+ *  \retval > 0 If a space or a break is found, and the result is the position relative to
+ *		currentpos.
+ */
+static int xmldoc_foundspace_backward(const char *text, int currentpos, int maxdiff)
+{
+	int i;
+
+	for (i = currentpos; i > 0; i--) {
+		if (text[i] == ' ' || text[i] == '\n') {
+			return (currentpos - i);
+		} else if (text[i] == 'm' && (text[i - 1] >= '0' || text[i - 1] <= '9')) {
+			/* give up, we found the end of a possible ESC sequence. */
+			return 0;
+		} else if (currentpos - i > maxdiff) {
+			/* give up, we can't move anymore. */
+			return 0;
+		}
+	}
+
+	/* we found the beginning of the text */
+
+	return 0;
+}
+
+/*! \internal
+ *  \brief Justify a text to a number of columns.
+ *  \param text Input text to be justified.
+ *  \param columns Number of columns to preserve in the text.
+ *  \param maxdiff Try to not cut a word when goinf down.
+ *  \retval NULL on error.
+ *  \retval The wrapped text.
+ */
+static char *xmldoc_string_wrap(const char *text, int columns, int maxdiff)
+{
+	struct ast_str *tmp;
+	char *ret, postbr[160];
+	int count = 1, i, backspace, needtobreak = 0, colmax, textlen;
+
+	/* sanity check */
+	if (!text || columns <= 0 || maxdiff < 0) {
+		ast_log(LOG_WARNING, "Passing wrong arguments while trying to wrap the text\n");
+		return NULL;
+	}
+
+	tmp = ast_str_create(strlen(text) * 3);
+
+	if (!tmp) {
+		return NULL;
+	}
+
+	/* Check for blanks and tabs and put them in postbr. */
+	xmldoc_setpostbr(postbr, sizeof(postbr), text);
+	colmax = columns - xmldoc_postbrlen(postbr);
+
+	textlen = strlen(text);
+	for (i = 0; i < textlen; i++) {
+		if (needtobreak || !(count % colmax)) {
+			if (text[i] == ' ') {
+				ast_str_append(&tmp, 0, "\n%s", postbr);
+				needtobreak = 0;
+				count = 1;
+			} else if (text[i] != '\n') {
+				needtobreak = 1;
+				if (xmldoc_wait_nextspace(text, i, maxdiff)) {
+					/* wait for the next space */
+					ast_str_append(&tmp, 0, "%c", text[i]);
+					continue;
+				}
+				/* Try to look backwards */
+				backspace = xmldoc_foundspace_backward(text, i, maxdiff);
+				if (backspace) {
+					needtobreak = 1;
+					tmp->used -= backspace;
+					tmp->str[tmp->used] = '\0';
+					i -= backspace + 1;
+					continue;
+				}
+				ast_str_append(&tmp, 0, "\n%s", postbr);
+				needtobreak = 0;
+				count = 1;
+			}
+			/* skip blanks after a \n */
+			while (text[i] == ' ') {
+				i++;
+			}
+		}
+		if (text[i] == '\n') {
+			xmldoc_setpostbr(postbr, sizeof(postbr), &text[i] + 1);
+			colmax = columns - xmldoc_postbrlen(postbr);
+			needtobreak = 0;
+			count = 1;
+		}
+		if (text[i] == ESC) {
+			/* Ignore Escape sequences. */
+			do {
+				ast_str_append(&tmp, 0, "%c", text[i]);
+				i++;
+			} while (i < textlen && text[i] != 'm');
+		} else {
+			count++;
+		}
+		ast_str_append(&tmp, 0, "%c", text[i]);
+	}
+
+	ret = ast_strdup(tmp->str);
+	ast_free(tmp);
+
+	return ret;
+}
+
+char *ast_xmldoc_printable(const char *bwinput, int withcolors)
+{
+	struct ast_str *colorized;
+	char *wrapped = NULL;
+	int i, c, len, colorsection;
+	char *tmp;
+	size_t bwinputlen;
+	static const int base_fg = COLOR_CYAN;
+
+	if (!bwinput) {
+		return NULL;
+	}
+
+	bwinputlen = strlen(bwinput);
+
+	if (!(colorized = ast_str_create(256))) {
+		return NULL;
+	}
+
+	if (withcolors) {
+		ast_term_color_code(&colorized, base_fg, 0);
+		if (!colorized) {
+			return NULL;
+		}
+	}
+
+	for (i = 0; i < bwinputlen; i++) {
+		colorsection = 0;
+		/* Check if we are at the beginning of a tag to be colorized. */
+		for (c = 0; c < ARRAY_LEN(colorized_tags); c++) {
+			if (strncasecmp(bwinput + i, colorized_tags[c].inittag, strlen(colorized_tags[c].inittag))) {
+				continue;
+			}
+
+			if (!(tmp = strcasestr(bwinput + i + strlen(colorized_tags[c].inittag), colorized_tags[c].endtag))) {
+				continue;
+			}
+
+			len = tmp - (bwinput + i + strlen(colorized_tags[c].inittag));
+
+			/* Setup color */
+			if (withcolors) {
+				ast_term_color_code(&colorized, colorized_tags[c].colorfg, 0);
+				if (!colorized) {
+					return NULL;
+				}
+			}
+
+			/* copy initial string replace */
+			ast_str_append(&colorized, 0, "%s", colorized_tags[c].init);
+			if (!colorized) {
+				return NULL;
+			}
+			{
+				char buf[len + 1];
+				ast_copy_string(buf, bwinput + i + strlen(colorized_tags[c].inittag), sizeof(buf));
+				ast_str_append(&colorized, 0, "%s", buf);
+			}
+			if (!colorized) {
+				return NULL;
+			}
+
+			/* copy the ending string replace */
+			ast_str_append(&colorized, 0, "%s", colorized_tags[c].end);
+			if (!colorized) {
+				return NULL;
+			}
+
+			/* Continue with the last color. */
+			if (withcolors) {
+				ast_term_color_code(&colorized, base_fg, 0);
+				if (!colorized) {
+					return NULL;
+				}
+			}
+
+			i += len + strlen(colorized_tags[c].endtag) + strlen(colorized_tags[c].inittag) - 1;
+			colorsection = 1;
+			break;
+		}
+
+		if (!colorsection) {
+			ast_str_append(&colorized, 0, "%c", bwinput[i]);
+			if (!colorized) {
+				return NULL;
+			}
+		}
+	}
+
+	if (withcolors) {
+		ast_term_color_code(&colorized, COLOR_BRWHITE, 0);
+		if (!colorized) {
+			return NULL;
+		}
+	}
+
+	/* Wrap the text, notice that string wrap will avoid cutting an ESC sequence. */
+	wrapped = xmldoc_string_wrap(colorized->str, xmldoc_text_columns, xmldoc_max_diff);
+
+	ast_free(colorized);
+
+	return wrapped;
+}
+
+/*! \internal
+ *  \brief Cleanup spaces and tabs after a \n
+ *  \param text String to be cleaned up.
+ *  \param output buffer (not already allocated).
+ *  \param lastspaces Remove last spaces in the string.
+ */
+static void xmldoc_string_cleanup(const char *text, struct ast_str **output, int lastspaces)
+{
+	int i;
+	size_t textlen;
+
+	if (!text) {
+		*output = NULL;
+		return;
+	}
+
+	textlen = strlen(text);
+
+	*output = ast_str_create(textlen);
+	if (!(*output)) {
+		ast_log(LOG_ERROR, "Problem allocating output buffer\n");
+		return;
+	}
+
+	for (i = 0; i < textlen; i++) {
+		if (text[i] == '\n' || text[i] == '\r') {
+			/* remove spaces/tabs/\n after a \n. */
+			while (text[i + 1] == '\t' || text[i + 1] == '\r' || text[i + 1] == '\n') {
+				i++;
+			}
+			ast_str_append(output, 0, " ");
+			continue;
+		} else {
+			ast_str_append(output, 0, "%c", text[i]);
+		}
+	}
+
+	/* remove last spaces (we dont want always to remove the trailing spaces). */
+	if (lastspaces) {
+		ast_str_trim_blanks(*output);
+	}
+}
+
+/*! \internal
+ *  \brief Get the application/function node for 'name' application/function with language 'language'
+ *         if we don't find any, get the first application with 'name' no matter which language with.
+ *  \param type 'application', 'function', ...
+ *  \param name Application or Function name.
+ *  \param language Try to get this language (if not found try with en_US)
+ *  \retval NULL on error.
+ *  \retval A node of type ast_xml_node.
+ */
+static struct ast_xml_node *xmldoc_get_node(const char *type, const char *name, const char *language)
+{
+	struct ast_xml_node *node = NULL;
+	struct documentation_tree *doctree;
+	const char *lang;
+
+	AST_RWLIST_RDLOCK(&xmldoc_tree);
+	AST_LIST_TRAVERSE(&xmldoc_tree, doctree, entry) {
+		/* the core xml documents have priority over thirdparty document. */
+		node = ast_xml_get_root(doctree->doc);
+		while ((node = ast_xml_find_element(node, type, "name", name))) {
+			/* Check language */
+			lang = ast_xml_get_attribute(node, "language");
+			if (lang && !strcmp(lang, language)) {
+				ast_xml_free_attr(lang);
+				break;
+			} else if (lang) {
+				ast_xml_free_attr(lang);
+			}
+		}
+
+		if (node && ast_xml_node_get_children(node)) {
+			break;
+		}
+
+		/* We didn't find the application documentation for the specified language,
+		so, try to load documentation for any language */
+		node = ast_xml_get_root(doctree->doc);
+		if (ast_xml_node_get_children(node)) {
+			if ((node = ast_xml_find_element(ast_xml_node_get_children(node), type, "name", name))) {
+				break;
+			}
+		}
+	}
+	AST_RWLIST_UNLOCK(&xmldoc_tree);
+
+	return node;
+}
+
+/*! \internal
+ *  \brief Helper function used to build the syntax, it allocates the needed buffer (or reallocates it),
+ *         and based on the reverse value it makes use of fmt to print the parameter list inside the 
+ *         realloced buffer (syntax).
+ *  \param reverse We are going backwards while generating the syntax?
+ *  \param len Current length of 'syntax' buffer.
+ *  \param syntax Output buffer for the concatenated values.
+ *  \param fmt A format string that will be used in a sprintf call.
+ */
+static __attribute__((format(printf,4,5))) void xmldoc_reverse_helper(int reverse, int *len, char **syntax, const char *fmt, ...)
+{
+	int totlen, tmpfmtlen;
+	char *tmpfmt, tmp;
+	va_list ap;
+
+	va_start(ap, fmt);
+	if (ast_vasprintf(&tmpfmt, fmt, ap) < 0) {
+		va_end(ap);
+		return;
+	}
+	va_end(ap);
+
+	tmpfmtlen = strlen(tmpfmt);
+	totlen = *len + tmpfmtlen + 1;
+
+	*syntax = ast_realloc(*syntax, totlen);
+
+	if (!*syntax) {
+		ast_free(tmpfmt);
+		return;
+	}
+
+	if (reverse) {
+		memmove(*syntax + tmpfmtlen, *syntax, *len);
+		/* Save this char, it will be overwritten by the \0 of strcpy. */
+		tmp = (*syntax)[0];
+		strcpy(*syntax, tmpfmt);
+		/* Restore the already saved char. */
+		(*syntax)[tmpfmtlen] = tmp;
+		(*syntax)[totlen - 1] = '\0';
+	} else {
+		strcpy(*syntax + *len, tmpfmt);
+	}
+
+	*len = totlen - 1;
+	ast_free(tmpfmt);
+}
+
+/*! \internal
+ *  \brief Check if the passed node has <argument> tags inside it.
+ *  \param node Root node to search argument elements.
+ *  \retval 1 If a <argument> element is found inside 'node'.
+ *  \retval 0 If no <argument> is found inside 'node'.
+ */
+static int xmldoc_has_arguments(struct ast_xml_node *fixnode)
+{
+	struct ast_xml_node *node = fixnode;
+
+	for (node = ast_xml_node_get_children(fixnode); node; node = ast_xml_node_get_next(node)) {
+		if (!strcasecmp(ast_xml_node_get_name(node), "argument")) {
+			return 1;
+		}
+	}
+	return 0;
+}
+
+/*! \internal
+ *  \brief Build the syntax for a specified starting node.
+ *  \param rootnode A pointer to the ast_xml root node.
+ *  \param rootname Name of the application, function, option, etc. to build the syntax.
+ *  \param childname The name of each parameter node.
+ *  \param printparenthesis Boolean if we must print parenthesis if not parameters are found in the rootnode.
+ *  \param printrootname Boolean if we must print the rootname before the syntax and parenthesis at the begining/end.
+ *  \retval NULL on error.
+ *  \retval An ast_malloc'ed string with the syntax generated.
+ */
+static char *xmldoc_get_syntax(struct ast_xml_node *rootnode, const char *rootname, const char *childname, int printparenthesis, int printrootname)
+{
+#define GOTONEXT(__rev, __a) (__rev ? ast_xml_node_get_prev(__a) : ast_xml_node_get_next(__a))
+#define ISLAST(__rev, __a)  (__rev == 1 ? (ast_xml_node_get_prev(__a) ? 0 : 1) : (ast_xml_node_get_next(__a) ? 0 : 1))
+#define MP(__a) ((multiple ? __a : ""))
+	struct ast_xml_node *node = NULL, *firstparam = NULL, *lastparam = NULL;
+	const char *paramtype, *multipletype, *paramname, *attrargsep, *parenthesis, *argname;
+	int reverse, required, paramcount = 0, openbrackets = 0, len = 0, hasparams=0;
+	int reqfinode = 0, reqlanode = 0, optmidnode = 0, prnparenthesis;
+	char *syntax = NULL, *argsep;
+	int paramnamemalloc, multiple;
+
+	if (ast_strlen_zero(rootname) || ast_strlen_zero(childname)) {
+		ast_log(LOG_WARNING, "Tried to look in XML tree with faulty rootname or childname while creating a syntax.\n");
+		return NULL;
+	}
+
+	if (!rootnode || !ast_xml_node_get_children(rootnode)) {
+		/* If the rootnode field is not found, at least print name. */
+		ast_asprintf(&syntax, "%s%s", (printrootname ? rootname : ""), (printparenthesis ? "()" : ""));
+		return syntax;
+	}
+
+	/* Get the argument separator from the root node attribute name 'argsep', if not found
+	defaults to ','. */
+	attrargsep = ast_xml_get_attribute(rootnode, "argsep");
+	if (attrargsep) {
+		argsep = ast_strdupa(attrargsep);
+		ast_xml_free_attr(attrargsep);
+	} else {
+		argsep = ast_strdupa(",");
+	}
+
+	/* Get order of evaluation. */
+	for (node = ast_xml_node_get_children(rootnode); node; node = ast_xml_node_get_next(node)) {
+		if (strcasecmp(ast_xml_node_get_name(node), childname)) {
+			continue;
+		}
+		required = 0;
+		hasparams = 1;
+		if ((paramtype = ast_xml_get_attribute(node, "required"))) {
+			if (ast_true(paramtype)) {
+				required = 1;
+			}
+			ast_xml_free_attr(paramtype);
+		}
+
+		lastparam = node;
+		reqlanode = required;
+
+		if (!firstparam) {
+			/* first parameter node */
+			firstparam = node;
+			reqfinode = required;
+		}
+	}
+
+	if (!hasparams) {
+		/* This application, function, option, etc, doesn't have any params. */
+		ast_asprintf(&syntax, "%s%s", (printrootname ? rootname : ""), (printparenthesis ? "()" : ""));
+		return syntax;
+	}
+
+	if (reqfinode && reqlanode) {
+		/* check midnode */
+		for (node = ast_xml_node_get_children(rootnode); node; node = ast_xml_node_get_next(node)) {
+			if (strcasecmp(ast_xml_node_get_name(node), childname)) {
+				continue;
+			}
+			if (node != firstparam && node != lastparam) {
+				if ((paramtype = ast_xml_get_attribute(node, "required"))) {
+					if (!ast_true(paramtype)) {
+						optmidnode = 1;
+						break;
+					}
+					ast_xml_free_attr(paramtype);
+				}
+			}
+		}
+	}
+
+	if ((!reqfinode && reqlanode) || (reqfinode && reqlanode && optmidnode)) {
+		reverse = 1;
+		node = lastparam;
+	} else {
+		reverse = 0;
+		node = firstparam;
+	}
+
+	/* init syntax string. */
+	if (reverse) {
+		xmldoc_reverse_helper(reverse, &len, &syntax,
+			(printrootname ? (printrootname == 2 ? ")]" : ")"): ""));
+	} else {
+		xmldoc_reverse_helper(reverse, &len, &syntax, "%s%s", (printrootname ? rootname : ""),
+			(printrootname ? (printrootname == 2 ? "[(" : "(") : ""));
+	}
+
+	for (; node; node = GOTONEXT(reverse, node)) {
+		if (strcasecmp(ast_xml_node_get_name(node), childname)) {
+			continue;
+		}
+
+		/* Get the argument name, if it is not the leaf, go inside that parameter. */
+		if (xmldoc_has_arguments(node)) {
+			parenthesis = ast_xml_get_attribute(node, "hasparams");
+			prnparenthesis = 0;
+			if (parenthesis) {
+				prnparenthesis = ast_true(parenthesis);
+				if (!strcasecmp(parenthesis, "optional")) {
+					prnparenthesis = 2;
+				}
+				ast_xml_free_attr(parenthesis);
+			}
+			argname = ast_xml_get_attribute(node, "name");
+			if (argname) {
+				paramname = xmldoc_get_syntax(node, argname, "argument", prnparenthesis, prnparenthesis);
+				ast_xml_free_attr(argname);
+				paramnamemalloc = 1;
+			} else {
+				/* Malformed XML, print **UNKOWN** */
+				paramname = ast_strdup("**unknown**");
+			}
+			paramnamemalloc = 1;
+		} else {
+			paramnamemalloc = 0;
+			paramname = ast_xml_get_attribute(node, "name");
+			if (!paramname) {
+				ast_log(LOG_WARNING, "Malformed XML %s: no %s name\n", rootname, childname);
+				if (syntax) {
+					/* Free already allocated syntax */
+					ast_free(syntax);
+				}
+				/* to give up is ok? */
+				ast_asprintf(&syntax, "%s%s", (printrootname ? rootname : ""), (printparenthesis ? "()" : ""));
+				return syntax;
+			}
+		}
+
+		/* Defaults to 'false'. */
+		multiple = 0;
+		if ((multipletype = ast_xml_get_attribute(node, "multiple"))) {
+			if (ast_true(multipletype)) {
+				multiple = 1;
+			}
+			ast_xml_free_attr(multipletype);
+		}
+
+		required = 0;	/* Defaults to 'false'. */
+		if ((paramtype = ast_xml_get_attribute(node, "required"))) {
+			if (ast_true(paramtype)) {
+				required = 1;
+			}
+			ast_xml_free_attr(paramtype);
+		}
+
+		/* build syntax core. */
+
+		if (required) {
+			/* First parameter */
+			if (!paramcount) {
+				xmldoc_reverse_helper(reverse, &len, &syntax, "%s%s%s%s", paramname, MP("["), MP(argsep), MP("...]"));
+			} else {
+				/* Time to close open brackets. */
+				while (openbrackets > 0) {
+					xmldoc_reverse_helper(reverse, &len, &syntax, (reverse ? "[" : "]"));
+					openbrackets--;
+				}
+				if (reverse) {
+					xmldoc_reverse_helper(reverse, &len, &syntax, "%s%s", paramname, argsep);
+				} else {
+					xmldoc_reverse_helper(reverse, &len, &syntax, "%s%s", argsep, paramname);
+				}
+				xmldoc_reverse_helper(reverse, &len, &syntax, "%s%s%s", MP("["), MP(argsep), MP("...]"));
+			}
+		} else {
+			/* First parameter */
+			if (!paramcount) {
+				xmldoc_reverse_helper(reverse, &len, &syntax, "[%s%s%s%s]", paramname, MP("["), MP(argsep), MP("...]"));
+			} else {
+				if (ISLAST(reverse, node)) {
+					/* This is the last parameter. */
+					if (reverse) {
+						xmldoc_reverse_helper(reverse, &len, &syntax, "[%s%s%s%s]%s", paramname,
+									MP("["), MP(argsep), MP("...]"), argsep);
+					} else {
+						xmldoc_reverse_helper(reverse, &len, &syntax, "%s[%s%s%s%s]", argsep, paramname,
+									MP("["), MP(argsep), MP("...]"));
+					}
+				} else {
+					if (reverse) {
+						xmldoc_reverse_helper(reverse, &len, &syntax, "%s%s%s%s%s]", paramname, argsep,
+									MP("["), MP(argsep), MP("...]"));
+					} else {
+						xmldoc_reverse_helper(reverse, &len, &syntax, "[%s%s%s%s%s", argsep, paramname,
+									MP("["), MP(argsep), MP("...]"));
+					}
+					openbrackets++;
+				}
+			}
+		}
+		if (paramnamemalloc) {
+			ast_free((char *) paramname);
+		} else {
+			ast_xml_free_attr(paramname);
+		}
+
+		paramcount++;
+	}
+
+	/* Time to close open brackets. */
+	while (openbrackets > 0) {
+		xmldoc_reverse_helper(reverse, &len, &syntax, (reverse ? "[" : "]"));
+		openbrackets--;
+	}
+
+	/* close syntax string. */
+	if (reverse) {
+		xmldoc_reverse_helper(reverse, &len, &syntax, "%s%s", (printrootname ? rootname : ""),
+			(printrootname ? (printrootname == 2 ? "[(" : "(") : ""));
+	} else {
+		xmldoc_reverse_helper(reverse, &len, &syntax, (printrootname ? (printrootname == 2 ? ")]" : ")") : ""));
+	}
+
+	return syntax;
+#undef ISLAST
+#undef GOTONEXT
+#undef MP
+}
+
+char *ast_xmldoc_build_syntax(const char *type, const char *name)
+{
+	struct ast_xml_node *node;
+	char *syntax = NULL;
+
+	node = xmldoc_get_node(type, name, documentation_language);
+	if (!node) {
+		return NULL;
+	}
+
+	for (node = ast_xml_node_get_children(node); node; node = ast_xml_node_get_next(node)) {
+		if (!strcasecmp(ast_xml_node_get_name(node), "syntax")) {
+			break;
+		}
+	}
+
+	if (node) {
+		syntax = xmldoc_get_syntax(node, name, "parameter", 1, 1);
+	}
+	return syntax;
+}
+
+/*! \internal
+ *  \brief Parse a <para> element.
+ *  \param node The <para> element pointer.
+ *  \param tabs Added this string before the content of the <para> element.
+ *  \param posttabs Added this string after the content of the <para> element.
+ *  \param buffer This must be an already allocated ast_str. It will be used
+ *         to store the result (if already has something it will be appended to the current
+ *         string).
+ *  \retval 1 If 'node' is a named 'para'.
+ *  \retval 2 If data is appended in buffer.
+ *  \retval 0 on error.
+ */
+static int xmldoc_parse_para(struct ast_xml_node *node, const char *tabs, const char *posttabs, struct ast_str **buffer)
+{
+	const char *tmptext;
+	struct ast_xml_node *tmp;
+	int ret = 0;
+	struct ast_str *tmpstr;
+
+	if (!node || !ast_xml_node_get_children(node)) {
+		return ret;
+	}
+
+	if (strcasecmp(ast_xml_node_get_name(node), "para")) {
+		return ret;
+	}
+
+	ast_str_append(buffer, 0, "%s", tabs);
+
+	ret = 1;
+
+	for (tmp = ast_xml_node_get_children(node); tmp; tmp = ast_xml_node_get_next(tmp)) {
+		/* Get the text inside the <para> element and append it to buffer. */
+		tmptext = ast_xml_get_text(tmp);
+		if (tmptext) {
+			/* Strip \n etc. */
+			xmldoc_string_cleanup(tmptext, &tmpstr, 0);
+			ast_xml_free_text(tmptext);
+			if (tmpstr) {
+				if (strcasecmp(ast_xml_node_get_name(tmp), "text")) {
+					ast_str_append(buffer, 0, "<%s>%s</%s>", ast_xml_node_get_name(tmp), 
+							tmpstr->str, ast_xml_node_get_name(tmp));
+				} else {
+					ast_str_append(buffer, 0, "%s", tmpstr->str);
+				}
+				ast_free(tmpstr);
+				ret = 2;
+			}
+		}
+	}
+
+	ast_str_append(buffer, 0, "%s", posttabs);
+
+	return ret;
+}
+
+/*! \internal
+ *  \brief Parse special elements defined in 'struct special_tags' special elements must have a <para> element inside them.
+ *  \param fixnode special tag node pointer.
+ *  \param tabs put tabs before printing the node content.
+ *  \param posttabs put posttabs after printing node content.
+ *  \param buffer Output buffer, the special tags will be appended here.
+ *  \retval 0 if no special element is parsed.
+ *  \retval 1 if a special element is parsed (data is appended to buffer).
+ *  \retval 2 if a special element is parsed and also a <para> element is parsed inside the specialtag.
+ */
+static int xmldoc_parse_specialtags(struct ast_xml_node *fixnode, const char *tabs, const char *posttabs, struct ast_str **buffer)
+{
+	struct ast_xml_node *node = fixnode;
+	int ret = 0, i, count = 0;
+
+	if (!node || !ast_xml_node_get_children(node)) {
+		return ret;
+	}
+
+	for (i = 0; i < ARRAY_LEN(special_tags); i++) {
+		if (strcasecmp(ast_xml_node_get_name(node), special_tags[i].tagname)) {
+			continue;
+		}
+
+		ret = 1;
+		/* This is a special tag. */
+
+		/* concat data */
+		if (!ast_strlen_zero(special_tags[i].init)) {
+			ast_str_append(buffer, 0, "%s%s", tabs, special_tags[i].init);
+		}
+
+		/* parse <para> elements inside special tags. */
+		for (node = ast_xml_node_get_children(node); node; node = ast_xml_node_get_next(node)) {
+			/* first <para> just print it without tabs at the begining. */
+			if (xmldoc_parse_para(node, (!count ? "" : tabs), posttabs, buffer) == 2) {
+				ret = 2;
+			}
+		}
+
+		if (!ast_strlen_zero(special_tags[i].end)) {
+			ast_str_append(buffer, 0, "%s%s", special_tags[i].end, posttabs);
+		}
+
+		break;
+	}
+
+	return ret;
+}
+
+/*! \internal
+ *  \brief Parse an <argument> element from the xml documentation.
+ *  \param fixnode Pointer to the 'argument' xml node.
+ *  \param insideparameter If we are parsing an <argument> inside a <parameter>.
+ *  \param paramtabs pre tabs if we are inside a parameter element.
+ *  \param tabs What to be printed before the argument name.
+ *  \param buffer Output buffer to put values found inside the <argument> element.
+ *  \retval 1 If there is content inside the argument.
+ *  \retval 0 If the argument element is not parsed, or there is no content inside it.
+ */
+static int xmldoc_parse_argument(struct ast_xml_node *fixnode, int insideparameter, const char *paramtabs, const char *tabs, struct ast_str **buffer)
+{
+	struct ast_xml_node *node = fixnode;
+	const char *argname;
+	int count = 0, ret = 0;
+
+	if (!node || !ast_xml_node_get_children(node)) {
+		return ret;
+	}
+
+	/* Print the argument names */
+	argname = ast_xml_get_attribute(node, "name");
+	if (!argname) {
+		return 0;
+	}
+	ast_str_append(buffer, 0, "%s%s%s", tabs, argname, (insideparameter ? "\n" : ""));
+	ast_xml_free_attr(argname);
+
+	for (node = ast_xml_node_get_children(node); node; node = ast_xml_node_get_next(node)) {
+		if (xmldoc_parse_para(node, (insideparameter ? paramtabs : (!count ? " - " : tabs)), "\n", buffer) == 2) {
+			count++;
+			ret = 1;
+		} else if (xmldoc_parse_specialtags(node, (insideparameter ? paramtabs : (!count ? " - " : tabs)), "\n", buffer) == 2) {
+			count++;
+			ret = 1;
+		}
+	}
+
+	return ret;
+}
+
+/*! \internal
+ *  \brief Parse a <variable> node inside a <variablelist> node.
+ *  \param node The variable node to parse.
+ *  \param tabs A string to be appended at the begining of the output that will be stored
+ *         in buffer.
+ *  \param buffer This must be an already created ast_str. It will be used
+ *         to store the result (if already has something it will be appended to the current
+ *         string).
+ *  \retval 0 if no data is appended.
+ *  \retval 1 if data is appended.
+ */
+static int xmldoc_parse_variable(struct ast_xml_node *node, const char *tabs, struct ast_str **buffer)
+{
+	struct ast_xml_node *tmp;
+	const char *valname;
+	const char *tmptext;
+	struct ast_str *cleanstr;
+	int ret = 0, printedpara=0;
+
+	for (tmp = ast_xml_node_get_children(node); tmp; tmp = ast_xml_node_get_next(tmp)) {
+		if (xmldoc_parse_para(tmp, (ret ? tabs : ""), "\n", buffer)) {
+			printedpara = 1;
+			continue;
+		} else if (xmldoc_parse_specialtags(tmp, (ret ? tabs : ""), "\n", buffer)) {
+			printedpara = 1;
+			continue;
+		}
+
+		if (strcasecmp(ast_xml_node_get_name(tmp), "value")) {
+			continue;
+		}
+
+		/* Parse a <value> tag only. */
+		if (!printedpara) {
+			ast_str_append(buffer, 0, "\n");
+			printedpara = 1;
+		}
+		/* Parse each <value name='valuename'>desciption</value> */
+		valname = ast_xml_get_attribute(tmp, "name");
+		if (valname) {
+			ret = 1;
+			ast_str_append(buffer, 0, "%s<value>%s</value>", tabs, valname);
+			ast_xml_free_attr(valname);
+		}
+		tmptext = ast_xml_get_text(tmp);
+		/* Check inside this node for any explanation about its meaning. */
+		if (tmptext) {
+			/* Cleanup text. */
+			xmldoc_string_cleanup(tmptext, &cleanstr, 1);
+			ast_xml_free_text(tmptext);
+			if (cleanstr && cleanstr->used > 0) {
+				ast_str_append(buffer, 0, ":%s", cleanstr->str);
+			}
+			ast_free(cleanstr);
+		}
+		ast_str_append(buffer, 0, "\n");
+	}
+
+	return ret;
+}
+
+/*! \internal
+ *  \brief Parse a <variablelist> node and put all the output inside 'buffer'.
+ *  \param node The variablelist node pointer.
+ *  \param tabs A string to be appended at the begining of the output that will be stored
+ *         in buffer.
+ *  \param buffer This must be an already created ast_str. It will be used
+ *         to store the result (if already has something it will be appended to the current
+ *         string).
+ *  \retval 1 If a <variablelist> element is parsed.
+ *  \retval 0 On error.
+ */
+static int xmldoc_parse_variablelist(struct ast_xml_node *node, const char *tabs, struct ast_str **buffer)
+{
+	struct ast_xml_node *tmp;
+	const char *varname;
+	char *vartabs;
+	int ret = 0;
+
+	if (!node || !ast_xml_node_get_children(node)) {
+		return ret;
+	}
+
+	if (strcasecmp(ast_xml_node_get_name(node), "variablelist")) {
+		return ret;
+	}
+
+	/* use this spacing (add 4 spaces) inside a variablelist node. */
+	ast_asprintf(&vartabs, "%s    ", tabs);
+	if (!vartabs) {
+		return ret;
+	}
+	for (tmp = ast_xml_node_get_children(node); tmp; tmp = ast_xml_node_get_next(tmp)) {
+		/* We can have a <para> element inside the variable list */
+		if ((xmldoc_parse_para(tmp, (ret ? tabs : ""), "\n", buffer))) {
+			ret = 1;
+			continue;
+		} else if ((xmldoc_parse_specialtags(tmp, (ret ? tabs : ""), "\n", buffer))) {
+			ret = 1;
+			continue;
+		}
+
+		if (!strcasecmp(ast_xml_node_get_name(tmp), "variable")) {
+			/* Store the variable name in buffer. */
+			varname = ast_xml_get_attribute(tmp, "name");
+			if (varname) {
+				ast_str_append(buffer, 0, "%s<variable>%s</variable>: ", tabs, varname);
+				ast_xml_free_attr(varname);
+				/* Parse the <variable> possible values. */
+				xmldoc_parse_variable(tmp, vartabs, buffer);
+				ret = 1;
+			}
+		}
+	}
+
+	ast_free(vartabs);
+
+	return ret;
+}
+
+char *ast_xmldoc_build_seealso(const char *type, const char *name)
+{
+	struct ast_str *outputstr;
+	char *output;
+	struct ast_xml_node *node;
+	const char *typename;
+	const char *content;
+	int first = 1;
+
+	if (ast_strlen_zero(type) || ast_strlen_zero(name)) {
+		return NULL;
+	}
+
+	/* get the application/function root node. */
+	node = xmldoc_get_node(type, name, documentation_language);
+	if (!node || !ast_xml_node_get_children(node)) {
+		return NULL;
+	}
+
+	/* Find the <see-also> node. */
+	for (node = ast_xml_node_get_children(node); node; node = ast_xml_node_get_next(node)) {
+		if (!strcasecmp(ast_xml_node_get_name(node), "see-also")) {
+			break;
+		}
+	}
+
+	if (!node || !ast_xml_node_get_children(node)) {
+		/* we couldnt find a <see-also> node. */
+		return NULL;
+	}
+
+	/* prepare the output string. */
+	outputstr = ast_str_create(128);
+	if (!outputstr) {
+		return NULL;
+	}
+
+	/* get into the <see-also> node. */
+	for (node = ast_xml_node_get_children(node); node; node = ast_xml_node_get_next(node)) {
+		if (strcasecmp(ast_xml_node_get_name(node), "ref")) {
+			continue;
+		}
+
+		/* parse the <ref> node. 'type' attribute is required. */
+		typename = ast_xml_get_attribute(node, "type");
+		if (!typename) {
+			continue;
+		}
+		content = ast_xml_get_text(node);
+		if (!content) {
+			ast_xml_free_attr(typename);
+			continue;
+		}
+		if (!strcasecmp(typename, "application")) {
+			ast_str_append(&outputstr, 0, "%s%s()",	(first ? "" : ", "), content);
+		} else if (!strcasecmp(typename, "function")) {
+			ast_str_append(&outputstr, 0, "%s%s", (first ? "" : ", "), content);
+		} else if (!strcasecmp(typename, "astcli")) {
+			ast_str_append(&outputstr, 0, "%s<astcli>%s</astcli>", (first ? "" : ", "), content);
+		} else {
+			ast_str_append(&outputstr, 0, "%s%s", (first ? "" : ", "), content);
+		}
+		first = 0;
+		ast_xml_free_text(content);
+	}
+
+	output = ast_strdup(outputstr->str);
+	ast_free(outputstr);
+
+	return output;
+}
+
+/*! \internal
+ *  \brief Parse a <enum> node.
+ *  \brief fixnode An ast_xml_node pointer to the <enum> node.
+ *  \bried buffer The output buffer.
+ *  \retval 0 if content is not found inside the enum element (data is not appended to buffer).
+ *  \retval 1 if content is found and data is appended to buffer.
+ */
+static int xmldoc_parse_enum(struct ast_xml_node *fixnode, const char *tabs, struct ast_str **buffer)
+{
+	struct ast_xml_node *node = fixnode;
+	int ret = 0;
+
+	for (node = ast_xml_node_get_children(node); node; node = ast_xml_node_get_next(node)) {
+		if ((xmldoc_parse_para(node, (ret ? tabs : " - "), "\n", buffer))) {
+			ret = 1;
+		} else if ((xmldoc_parse_specialtags(node, (ret ? tabs : " - "), "\n", buffer))) {
+			ret = 1;
+		}
+	}
+	return ret;
+}
+
+/*! \internal
+ *  \brief Parse a <enumlist> node.
+ *  \param fixnode As ast_xml pointer to the <enumlist> node.
+ *  \param buffer The ast_str output buffer.
+ *  \retval 0 if no <enumlist> node was parsed.
+ *  \retval 1 if a <enumlist> node was parsed.
+ */
+static int xmldoc_parse_enumlist(struct ast_xml_node *fixnode, const char *tabs, struct ast_str **buffer)
+{
+	struct ast_xml_node *node = fixnode;
+	const char *enumname;
+	int ret = 0;
+
+	for (node = ast_xml_node_get_children(node); node; node = ast_xml_node_get_next(node)) {
+		if (strcasecmp(ast_xml_node_get_name(node), "enum")) {
+			continue;
+		}
+
+		enumname = ast_xml_get_attribute(node, "name");
+		if (enumname) {
+			ast_str_append(buffer, 0, "%s<enum>%s</enum>", tabs, enumname);
+			ast_xml_free_attr(enumname);
+
+			/* parse only enum elements inside a enumlist node. */
+			if ((xmldoc_parse_enum(node, tabs, buffer))) {
+				ret = 1;
+			} else {
+				ast_str_append(buffer, 0, "\n");
+			}
+		}
+	}
+	return ret;
+}
+
+/*! \internal
+ *  \brief Parse an <option> node.
+ *  \param fixnode An ast_xml pointer to the <option> node.
+ *  \param tabs A string to be appended at the begining of each line being added to the
+ *              buffer string.
+ *  \param buffer The output buffer.
+ *  \retval 0 if no option node is parsed.
+ *  \retval 1 if an option node is parsed.
+ */
+static int xmldoc_parse_option(struct ast_xml_node *fixnode, const char *tabs, struct ast_str **buffer)
+{
+	struct ast_xml_node *node;
+	int ret = 0;
+	char *optiontabs;
+
+	ast_asprintf(&optiontabs, "%s    ", tabs);
+	if (!optiontabs) {
+		return ret;
+	}
+	for (node = ast_xml_node_get_children(fixnode); node; node = ast_xml_node_get_next(node)) {
+		if (!strcasecmp(ast_xml_node_get_name(node), "argument")) {
+			/* if this is the first data appended to buffer, print a \n*/
+			if (!ret && ast_xml_node_get_children(node)) {
+				/* print \n */
+				ast_str_append(buffer, 0, "\n");
+			}
+			if (xmldoc_parse_argument(node, 0, NULL, optiontabs, buffer)) {
+				ret = 1;
+			}
+			continue;
+		}
+
+		if (xmldoc_parse_para(node, (ret ? tabs :  ""), "\n", buffer)) {
+			ret = 1;
+		} else if (xmldoc_parse_specialtags(node, (ret ? tabs :  ""), "\n", buffer)) {
+			ret = 1;
+		}
+
+		xmldoc_parse_variablelist(node, optiontabs, buffer);
+
+		xmldoc_parse_enumlist(node, optiontabs, buffer);
+	}
+	ast_free(optiontabs);
+
+	return ret;
+}
+
+/*! \internal
+ *  \brief Parse an <optionlist> element from the xml documentation.
+ *  \param fixnode Pointer to the optionlist xml node.
+ *  \param tabs A string to be appended at the begining of each line being added to the
+ *              buffer string.
+ *  \param buffer Output buffer to put what is inside the optionlist tag.
+ */
+static void xmldoc_parse_optionlist(struct ast_xml_node *fixnode, const char *tabs, struct ast_str **buffer)
+{
+	struct ast_xml_node *node;
+	const char *optname;
+	char *optionsyntax;
+
+	for (node = ast_xml_node_get_children(fixnode); node; node = ast_xml_node_get_next(node)) {
+		/* Start appending every option tag. */
+		if (strcasecmp(ast_xml_node_get_name(node), "option")) {
+			continue;
+		}
+
+		/* Get the option name. */
+		optname = ast_xml_get_attribute(node, "name");
+		if (!optname) {
+			continue;
+		}
+
+		optionsyntax = xmldoc_get_syntax(node, optname, "argument", 0, 1);
+		if (!optionsyntax) {
+			continue;
+		}
+
+		ast_str_append(buffer, 0, "%s%s: ", tabs, optionsyntax);
+
+		if (!xmldoc_parse_option(node, tabs, buffer)) {
+			ast_str_append(buffer, 0, "\n");
+		}
+	}
+}
+
+/*! \internal
+ *  \brief Parse a 'parameter' tag inside a syntax element.
+ *  \param fixnode A pointer to the 'parameter' xml node.
+ *  \param tabs A string to be appended at the beginning of each line being printed inside
+ *              'buffer'.
+ *  \param buffer String buffer to put values found inside the parameter element.
+ */
+static void xmldoc_parse_parameter(struct ast_xml_node *fixnode, const char *tabs, struct ast_str **buffer)
+{
+	const char *paramname;
+	struct ast_xml_node *node = fixnode;
+	int hasarguments, printed = 0;
+	char *internaltabs;
+
+	if (strcasecmp(ast_xml_node_get_name(node), "parameter")) {
+		return;
+	}
+
+	hasarguments = xmldoc_has_arguments(node);
+	if (!(paramname = ast_xml_get_attribute(node, "name"))) {
+		/* parameter MUST have an attribute name. */
+		return;
+	}
+
+	ast_asprintf(&internaltabs, "%s    ", tabs);
+	if (!internaltabs) {
+		return;
+	}
+
+	if (!hasarguments) {
+		ast_str_append(buffer, 0, "%s\n", paramname);
+		ast_xml_free_attr(paramname);
+		printed = 1;
+	}
+
+	for (node = ast_xml_node_get_children(node); node; node = ast_xml_node_get_next(node)) {
+		if (!strcasecmp(ast_xml_node_get_name(node), "optionlist")) {
+			xmldoc_parse_optionlist(node, internaltabs, buffer);
+		} else if (!strcasecmp(ast_xml_node_get_name(node), "enumlist")) {
+			xmldoc_parse_enumlist(node, internaltabs, buffer);
+		} else if (!strcasecmp(ast_xml_node_get_name(node), "argument")) {
+			xmldoc_parse_argument(node, 1, internaltabs, (!hasarguments ? "        " : ""), buffer);
+		} else if (!strcasecmp(ast_xml_node_get_name(node), "para")) {
+			if (!printed) {
+				ast_str_append(buffer, 0, "%s\n", paramname);
+				ast_xml_free_attr(paramname);
+				printed = 1;
+			}
+			xmldoc_parse_para(node, internaltabs, "\n", buffer);
+			continue;
+		} else if ((xmldoc_parse_specialtags(node, internaltabs, "\n", buffer))) {
+			continue;
+		}
+	}
+	ast_free(internaltabs);
+}
+
+char *ast_xmldoc_build_arguments(const char *type, const char *name)
+{
+	struct ast_xml_node *node;
+	struct ast_str *ret = ast_str_create(128);
+	char *retstr = NULL;
+
+	if (ast_strlen_zero(type) || ast_strlen_zero(name)) {
+		return NULL;
+	}
+
+	node = xmldoc_get_node(type, name, documentation_language);
+
+	if (!node || !ast_xml_node_get_children(node)) {
+		return NULL;
+	}
+
+	/* Find the syntax field. */
+	for (node = ast_xml_node_get_children(node); node; node = ast_xml_node_get_next(node)) {
+		if (!strcasecmp(ast_xml_node_get_name(node), "syntax")) {
+			break;
+		}
+	}
+
+	if (!node || !ast_xml_node_get_children(node)) {
+		/* We couldn't find the syntax node. */
+		return NULL;
+	}
+
+	for (node = ast_xml_node_get_children(node); node; node = ast_xml_node_get_next(node)) {
+		xmldoc_parse_parameter(node, "", &ret);
+	}
+
+	if (ret->used > 0) {
+		/* remove last '\n' */
+		if (ret->str[ret->used - 1] == '\n') {
+			ret->str[ret->used - 1] = '\0';
+			ret->used--;
+		}
+		retstr = ast_strdup(ret->str);
+	}
+	ast_free(ret);
+
+	return retstr;
+}
+
+/*! \internal
+ *  \brief Return the string within a node formatted with <para> and <variablelist> elements.
+ *  \param node Parent node where content resides.
+ *  \param raw If set, return the node's content without further processing.
+ *  \param raw_wrap Wrap raw text.
+ *  \retval NULL on error
+ *  \retval Node content on success.
+ */
+static struct ast_str *xmldoc_get_formatted(struct ast_xml_node *node, int raw_output, int raw_wrap)
+{
+	struct ast_xml_node *tmp;
+	const char *notcleanret, *tmpstr;
+	struct ast_str *ret = ast_str_create(128);
+
+	if (raw_output) {
+		notcleanret = ast_xml_get_text(node);
+		tmpstr = notcleanret;
+		xmldoc_string_cleanup(ast_skip_blanks(notcleanret), &ret, 0);
+		ast_xml_free_text(tmpstr);
+	} else {
+		for (tmp = ast_xml_node_get_children(node); tmp; tmp = ast_xml_node_get_next(tmp)) {
+			/* if found, parse a <para> element. */
+			if (xmldoc_parse_para(tmp, "", "\n", &ret)) {
+				continue;
+			} else if (xmldoc_parse_specialtags(tmp, "", "\n", &ret)) {
+				continue;
+			}
+			/* if found, parse a <variablelist> element. */
+			xmldoc_parse_variablelist(tmp, "", &ret);
+			xmldoc_parse_enumlist(tmp, "    ", &ret);
+		}
+		/* remove last '\n' */
+		/* XXX Don't modify ast_str internals manually */
+		if (ret->str[ret->used-1] == '\n') {
+			ret->str[ret->used-1] = '\0';
+			ret->used--;
+		}
+	}
+	return ret;
+}
+
+/*!
+ *  \brief Get the content of a field (synopsis, description, etc) from an asterisk document tree
+ *  \param type Type of element (application, function, ...).
+ *  \param name Name of element (Dial, Echo, Playback, ...).
+ *  \param var Name of field to return (synopsis, description, etc).
+ *  \param raw Field only contains text, no other elements inside it.
+ *  \retval NULL On error.
+ *  \retval Field text content on success.
+ */
+static char *xmldoc_build_field(const char *type, const char *name, const char *var, int raw)
+{
+	struct ast_xml_node *node;
+	char *ret = NULL;
+	struct ast_str *formatted;
+
+	if (ast_strlen_zero(type) || ast_strlen_zero(name)) {
+		ast_log(LOG_ERROR, "Tried to look in XML tree with faulty values.\n");
+		return ret;
+	}
+
+	node = xmldoc_get_node(type, name, documentation_language);
+
+	if (!node) {
+		ast_log(LOG_WARNING, "Counldn't find %s %s in XML documentation\n", type, name);
+		return ret;
+	}
+
+	node = ast_xml_find_element(ast_xml_node_get_children(node), var, NULL, NULL);
+
+	if (!node || !ast_xml_node_get_children(node)) {
+		ast_log(LOG_DEBUG, "Cannot find variable '%s' in tree '%s'\n", name, var);
+		return ret;
+	}
+
+	formatted = xmldoc_get_formatted(node, raw, raw);
+	if (formatted->used > 0) {
+		ret = ast_strdup(formatted->str);
+	}
+	ast_free(formatted);
+
+	return ret;
+}
+
+char *ast_xmldoc_build_synopsis(const char *type, const char *name)
+{
+	return xmldoc_build_field(type, name, "synopsis", 1);
+}
+
+char *ast_xmldoc_build_description(const char *type, const char *name)
+{
+	return xmldoc_build_field(type, name, "description", 0);
+}
+
+/*! \brief Close and unload XML documentation. */
+static void xmldoc_unload_documentation(void)
+{
+        struct documentation_tree *doctree;
+
+	AST_RWLIST_WRLOCK(&xmldoc_tree);
+	while ((doctree = AST_RWLIST_REMOVE_HEAD(&xmldoc_tree, entry))) {
+		ast_free(doctree->filename);
+		ast_xml_close(doctree->doc);
+	}
+	AST_RWLIST_UNLOCK(&xmldoc_tree);
+
+	ast_xml_finish();
+}
+
+int ast_xmldoc_load_documentation(void)
+{
+	struct ast_xml_node *root_node;
+	struct ast_xml_doc *tmpdoc;
+	struct documentation_tree *doc_tree;
+	char *xmlpattern;
+	struct ast_config *cfg = NULL;
+	struct ast_variable *var = NULL;
+	struct ast_flags cnfflags = { 0 };
+	int globret, i, dup, duplicate;
+	glob_t globbuf;
+
+	/* setup default XML documentation language */
+	snprintf(documentation_language, sizeof(documentation_language), default_documentation_language);
+
+	if ((cfg = ast_config_load2("asterisk.conf", "" /* core can't reload */, cnfflags))) {
+		for (var = ast_variable_browse(cfg, "options"); var; var = var->next) {
+			if (!strcasecmp(var->name, "documentation_language")) {
+				if (!ast_strlen_zero(var->value)) {
+					snprintf(documentation_language, sizeof(documentation_language), "%s", var->value);
+				}
+			}
+		}
+		ast_config_destroy(cfg);
+	}
+
+	/* initialize the XML library. */
+	ast_xml_init();
+
+	/* register function to be run when asterisk finish. */
+	ast_register_atexit(xmldoc_unload_documentation);
+
+	/* Get every *-LANG.xml file inside $(ASTDATADIR)/documentation */
+	ast_asprintf(&xmlpattern, "%s/documentation{/thirdparty/,/}*-{%s,%.2s_??,%s}.xml", ast_config_AST_DATA_DIR,
+			documentation_language, documentation_language, default_documentation_language);
+	globbuf.gl_offs = 0;    /* initialize it to silence gcc */
+	globret = glob(xmlpattern, MY_GLOB_FLAGS, NULL, &globbuf);
+	if (globret == GLOB_NOSPACE) {
+		ast_log(LOG_WARNING, "Glob Expansion of pattern '%s' failed: Not enough memory\n", xmlpattern);
+		ast_free(xmlpattern);
+		return 1;
+	} else if (globret  == GLOB_ABORTED) {
+		ast_log(LOG_WARNING, "Glob Expansion of pattern '%s' failed: Read error\n", xmlpattern);
+		ast_free(xmlpattern);
+		return 1;
+	}
+	ast_free(xmlpattern);
+
+	AST_RWLIST_WRLOCK(&xmldoc_tree);
+	/* loop over expanded files */
+	for (i = 0; i < globbuf.gl_pathc; i++) {
+		/* check for duplicates (if we already [try to] open the same file. */
+		duplicate = 0;
+		for (dup = 0; dup < i; dup++) {
+			if (!strcmp(globbuf.gl_pathv[i], globbuf.gl_pathv[dup])) {
+				duplicate = 1;
+				break;
+			}
+		}
+		if (duplicate) {
+			continue;
+		}
+		tmpdoc = NULL;
+		tmpdoc = ast_xml_open(globbuf.gl_pathv[i]);
+		if (!tmpdoc) {
+			ast_log(LOG_ERROR, "Could not open XML documentation at '%s'\n", globbuf.gl_pathv[i]);
+			continue;
+		}
+		/* Get doc root node and check if it starts with '<docs>' */
+		root_node = ast_xml_get_root(tmpdoc);
+		if (!root_node) {
+			ast_log(LOG_ERROR, "Error getting documentation root node");
+			ast_xml_close(tmpdoc);
+			continue;
+		}
+		/* Check root node name for malformed xmls. */
+		if (strcmp(ast_xml_node_get_name(root_node), "docs")) {
+			ast_log(LOG_ERROR, "Documentation file is not well formed!\n");
+			ast_xml_close(tmpdoc);
+			continue;
+		}
+		doc_tree = ast_calloc(1, sizeof(*doc_tree));
+		if (!doc_tree) {
+			ast_log(LOG_ERROR, "Unable to allocate documentation_tree structure!\n");
+			ast_xml_close(tmpdoc);
+			continue;
+		}
+		doc_tree->doc = tmpdoc;
+		doc_tree->filename = ast_strdup(globbuf.gl_pathv[i]);
+		AST_RWLIST_INSERT_TAIL(&xmldoc_tree, doc_tree, entry);
+	}
+	AST_RWLIST_UNLOCK(&xmldoc_tree);
+
+	globfree(&globbuf);
+
+	return 0;
+}
+
+#endif /* AST_XML_DOCS */
+
+