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Add lyd_print_mem_len API to return printed size #2103

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Add lyd_print_mem_len API to return printed size #2103

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18 changes: 18 additions & 0 deletions src/printer_data.c
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Original file line number Diff line number Diff line change
Expand Up @@ -102,6 +102,24 @@ lyd_print_mem(char **strp, const struct lyd_node *root, LYD_FORMAT format, uint3
return ret;
}

LIBYANG_API_DEF LY_ERR
lyd_print_mem_len(char **strp, const struct lyd_node *root, LYD_FORMAT format, uint32_t options, size_t *len)
{
LY_ERR ret;
struct ly_out *out;

LY_CHECK_ARG_RET(NULL, strp && len, LY_EINVAL);

/* init */
*strp = NULL;

LY_CHECK_RET(ly_out_new_memory(strp, 0, &out));
ret = lyd_print_(out, root, format, options);
*len = out->printed;
ly_out_free(out, NULL, 0);
return ret;
}

LIBYANG_API_DEF LY_ERR
lyd_print_fd(int fd, const struct lyd_node *root, LYD_FORMAT format, uint32_t options)
{
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5 changes: 5 additions & 0 deletions src/printer_data.h
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Expand Up @@ -133,6 +133,11 @@ LIBYANG_API_DECL LY_ERR lyd_print_tree(struct ly_out *out, const struct lyd_node
*/
LIBYANG_API_DECL LY_ERR lyd_print_mem(char **strp, const struct lyd_node *root, LYD_FORMAT format, uint32_t options);

/**
* @brief Same as lyd_print_mem but also return the length of buffer written
*/
LIBYANG_API_DEF LY_ERR lyd_print_mem_len(char **strp, const struct lyd_node *root, LYD_FORMAT format, uint32_t options, size_t *len);

/**
* @brief Print data tree in the specified format.
*
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