144 lines
3.5 KiB
C
144 lines
3.5 KiB
C
/*
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* blobmsg - library for generating/parsing structured blob messages
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*
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* Copyright (C) 2010 Felix Fietkau <nbd@openwrt.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License version 2.1
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* as published by the Free Software Foundation
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef __BLOBMSG_H
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#define __BLOBMSG_H
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#include "blob.h"
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#define BLOBMSG_ALIGN 2
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#define BLOBMSG_PADDING(len) (((len) + (1 << BLOBMSG_ALIGN) - 1) & ~((1 << BLOBMSG_ALIGN) - 1))
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enum blobmsg_type {
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BLOBMSG_TYPE_UNSPEC,
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BLOBMSG_TYPE_ARRAY,
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BLOBMSG_TYPE_TABLE,
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BLOBMSG_TYPE_STRING,
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BLOBMSG_TYPE_INT64,
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BLOBMSG_TYPE_INT32,
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BLOBMSG_TYPE_INT16,
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BLOBMSG_TYPE_INT8,
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__BLOBMSG_TYPE_LAST,
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BLOBMSG_TYPE_LAST = __BLOBMSG_TYPE_LAST - 1
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};
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struct blobmsg_hdr {
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uint16_t namelen;
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uint8_t name[];
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} __packed;
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struct blobmsg_policy {
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const char *name;
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enum blobmsg_type type;
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};
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static inline int blobmsg_hdrlen(int namelen)
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{
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return BLOBMSG_PADDING(sizeof(struct blobmsg_hdr) + namelen + 1);
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}
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static inline void *blobmsg_name(struct blob_attr *attr)
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{
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struct blobmsg_hdr *hdr = blob_data(attr);
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return &hdr->name;
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}
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static inline void *blobmsg_data(struct blob_attr *attr)
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{
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struct blobmsg_hdr *hdr = blob_data(attr);
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return (char *) hdr + blobmsg_hdrlen(hdr->namelen);
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}
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static inline int blobmsg_data_len(struct blob_attr *attr)
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{
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uint8_t *start, *end;
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start = blob_data(attr);
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end = blobmsg_data(attr);
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return blob_len(attr) - (end - start);
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}
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bool blobmsg_check_attr(const struct blob_attr *attr, bool name);
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int blobmsg_parse(const struct blobmsg_policy *policy, int policy_len,
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struct blob_attr **tb, void *data, int len);
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int blobmsg_add_field(struct blob_buf *buf, int type, const char *name,
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const void *data, int len);
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static inline int
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blobmsg_add_u8(struct blob_buf *buf, const char *name, uint8_t val)
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{
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return blobmsg_add_field(buf, BLOBMSG_TYPE_INT8, name, &val, 1);
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}
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static inline int
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blobmsg_add_u16(struct blob_buf *buf, const char *name, uint16_t val)
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{
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return blobmsg_add_field(buf, BLOBMSG_TYPE_INT16, name, &val, 2);
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}
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static inline int
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blobmsg_add_u32(struct blob_buf *buf, const char *name, uint32_t val)
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{
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return blobmsg_add_field(buf, BLOBMSG_TYPE_INT32, name, &val, 4);
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}
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static inline int
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blobmsg_add_u64(struct blob_buf *buf, const char *name, uint64_t val)
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{
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return blobmsg_add_field(buf, BLOBMSG_TYPE_INT64, name, &val, 8);
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}
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static inline int
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blobmsg_add_string(struct blob_buf *buf, const char *name, const char *string)
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{
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return blobmsg_add_field(buf, BLOBMSG_TYPE_STRING, name, string, strlen(string) + 1);
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}
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void *blobmsg_open_nested(struct blob_buf *buf, const char *name, bool array);
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static inline void *
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blobmsg_open_array(struct blob_buf *buf, const char *name)
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{
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return blobmsg_open_nested(buf, name, true);
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}
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static inline void *
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blobmsg_open_table(struct blob_buf *buf, const char *name)
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{
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return blobmsg_open_nested(buf, name, false);
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}
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static inline void
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blobmsg_close_array(struct blob_buf *buf, void *cookie)
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{
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blob_nest_end(buf, cookie);
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}
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static inline void
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blobmsg_close_table(struct blob_buf *buf, void *cookie)
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{
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blob_nest_end(buf, cookie);
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}
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static inline int blobmsg_buf_init(struct blob_buf *buf)
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{
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return blob_buf_init(buf, BLOBMSG_TYPE_TABLE);
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}
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char *blobmsg_format_json(struct blob_attr *attr);
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#endif
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