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diff --git a/src/templating/mustach-jansson.h b/src/templating/mustach-jansson.h
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+++ b/src/templating/mustach-jansson.h
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+/*
+ Author: José Bollo <jobol@nonadev.net>
+
+ https://gitlab.com/jobol/mustach
+
+ SPDX-License-Identifier: ISC
+*/
+
+#ifndef _mustach_jansson_h_included_
+#define _mustach_jansson_h_included_
+
+/*
+ * mustach-jansson is intended to make integration of jansson
+ * library by providing integrated functions.
+ */
+
+#include <jansson.h>
+#include "mustach-wrap.h"
+
+/**
+ * Wrap interface used internally by mustach jansson functions.
+ * Can be used for overriding behaviour.
+ */
+extern const struct mustach_wrap_itf mustach_jansson_wrap_itf;
+
+/**
+ * mustach_jansson_file - Renders the mustache 'template' in 'file' for 'root'.
+ *
+ * @template: the template string to instantiate
+ * @length:   length of the template or zero if unknown and template null terminated
+ * @root:     the root json object to render
+ * @file:     the file where to write the result
+ *
+ * Returns 0 in case of success, -1 with errno set in case of system error
+ * a other negative value in case of error.
+ */
+extern int mustach_jansson_file(const char *template, size_t length, json_t *root, int flags, FILE *file);
+
+/**
+ * mustach_jansson_fd - Renders the mustache 'template' in 'fd' for 'root'.
+ *
+ * @template: the template string to instantiate
+ * @length:   length of the template or zero if unknown and template null terminated
+ * @root:     the root json object to render
+ * @fd:       the file descriptor number where to write the result
+ *
+ * Returns 0 in case of success, -1 with errno set in case of system error
+ * a other negative value in case of error.
+ */
+extern int mustach_jansson_fd(const char *template, size_t length, json_t *root, int flags, int fd);
+
+
+/**
+ * mustach_jansson_mem - Renders the mustache 'template' in 'result' for 'root'.
+ *
+ * @template: the template string to instantiate
+ * @length:   length of the template or zero if unknown and template null terminated
+ * @root:     the root json object to render
+ * @result:   the pointer receiving the result when 0 is returned
+ * @size:     the size of the returned result
+ *
+ * Returns 0 in case of success, -1 with errno set in case of system error
+ * a other negative value in case of error.
+ */
+extern int mustach_jansson_mem(const char *template, size_t length, json_t *root, int flags, char **result, size_t *size);
+
+/**
+ * mustach_jansson_write - Renders the mustache 'template' for 'root' to custom writer 'writecb' with 'closure'.
+ *
+ * @template: the template string to instantiate
+ * @length:   length of the template or zero if unknown and template null terminated
+ * @root:     the root json object to render
+ * @writecb:  the function that write values
+ * @closure:  the closure for the write function
+ *
+ * Returns 0 in case of success, -1 with errno set in case of system error
+ * a other negative value in case of error.
+ */
+extern int mustach_jansson_write(const char *template, size_t length, json_t *root, int flags, mustach_write_cb_t *writecb, void *closure);
+
+/**
+ * mustach_jansson_emit - Renders the mustache 'template' for 'root' to custom emiter 'emitcb' with 'closure'.
+ *
+ * @template: the template string to instantiate
+ * @length:   length of the template or zero if unknown and template null terminated
+ * @root:     the root json object to render
+ * @emitcb:   the function that emit values
+ * @closure:  the closure for the write function
+ *
+ * Returns 0 in case of success, -1 with errno set in case of system error
+ * a other negative value in case of error.
+ */
+extern int mustach_jansson_emit(const char *template, size_t length, json_t *root, int flags, mustach_emit_cb_t *emitcb, void *closure);
+
+#endif
+