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- /*
- * Dynamic data buffer
- * Copyright (c) 2007-2012, Jouni Malinen <j@w1.fi>
- *
- * This software may be distributed under the terms of the BSD license.
- * See README for more details.
- */
- #ifndef FOTABUF_H
- #define FOTABUF_H
- #include <stdint.h>
- /* fotabuf::buf is a pointer to external data */
- #define FOTABUF_FLAG_EXT_DATA BIT(0)
- /*
- * Internal data structure for fotabuf. Please do not touch this directly from
- * elsewhere. This is only defined in header file to allow inline functions
- * from this file to access data.
- */
- struct fotabuf {
- size_t size; /* total size of the allocated buffer */
- size_t used; /* length of data in the buffer */
- uint8_t *buf; /* pointer to the head of the buffer */
- unsigned int flags;
- /* optionally followed by the allocated buffer */
- };
- int fotabuf_resize(struct fotabuf **buf, size_t add_len);
- struct fotabuf *fotabuf_alloc(size_t len);
- struct fotabuf *fotabuf_alloc_ext_data(uint8_t *data, size_t len);
- struct fotabuf *fotabuf_alloc_copy(const void *data, size_t len);
- struct fotabuf *fotabuf_dup(const struct fotabuf *src);
- void fotabuf_free(struct fotabuf *buf);
- void fotabuf_clear_free(struct fotabuf *buf);
- void *fotabuf_put(struct fotabuf *buf, size_t len);
- struct fotabuf *fotabuf_concat(struct fotabuf *a, struct fotabuf *b);
- struct fotabuf *fotabuf_zeropad(struct fotabuf *buf, size_t len);
- void fotabuf_printf(struct fotabuf *buf, char *fmt, ...) PRINTF_FORMAT(2, 3);
- struct fotabuf *fotabuf_parse_bin(const char *buf);
- /**
- * fotabuf_size - Get the currently allocated size of a fotabuf buffer
- * @buf: fotabuf buffer
- * Returns: Currently allocated size of the buffer
- */
- static inline size_t fotabuf_size(const struct fotabuf *buf)
- {
- return buf->size;
- }
- /**
- * fotabuf_len - Get the current length of a fotabuf buffer data
- * @buf: fotabuf buffer
- * Returns: Currently used length of the buffer
- */
- static inline size_t fotabuf_len(const struct fotabuf *buf)
- {
- return buf->used;
- }
- /**
- * fotabuf_tailroom - Get size of available tail room in the end of the buffer
- * @buf: fotabuf buffer
- * Returns: Tail room (in bytes) of available space in the end of the buffer
- */
- static inline size_t fotabuf_tailroom(const struct fotabuf *buf)
- {
- return buf->size - buf->used;
- }
- /**
- * fotabuf_head - Get pointer to the head of the buffer data
- * @buf: fotabuf buffer
- * Returns: Pointer to the head of the buffer data
- */
- static inline const void *fotabuf_head(const struct fotabuf *buf)
- {
- return buf->buf;
- }
- static inline const u8 *fotabuf_head_u8(const struct fotabuf *buf)
- {
- return (const u8 *) fotabuf_head(buf);
- }
- /**
- * fotabuf_mhead - Get modifiable pointer to the head of the buffer data
- * @buf: fotabuf buffer
- * Returns: Pointer to the head of the buffer data
- */
- static inline void *fotabuf_mhead(struct fotabuf *buf)
- {
- return buf->buf;
- }
- static inline u8 *fotabuf_mhead_u8(struct fotabuf *buf)
- {
- return (u8 *) fotabuf_mhead(buf);
- }
- static inline void fotabuf_put_u8(struct fotabuf *buf, u8 data)
- {
- u8 *pos = (u8 *) fotabuf_put(buf, 1);
- *pos = data;
- }
- static inline void fotabuf_put_le16(struct fotabuf *buf, u16 data)
- {
- u8 *pos = (u8 *) fotabuf_put(buf, 2);
- FOTA_PUT_LE16(pos, data);
- }
- static inline void fotabuf_put_le32(struct fotabuf *buf, u32 data)
- {
- u8 *pos = (u8 *) fotabuf_put(buf, 4);
- FOTA_PUT_LE32(pos, data);
- }
- static inline void fotabuf_put_be16(struct fotabuf *buf, u16 data)
- {
- u8 *pos = (u8 *) fotabuf_put(buf, 2);
- FOTA_PUT_BE16(pos, data);
- }
- static inline void fotabuf_put_be24(struct fotabuf *buf, u32 data)
- {
- u8 *pos = (u8 *) fotabuf_put(buf, 3);
- FOTA_PUT_BE24(pos, data);
- }
- static inline void fotabuf_put_be32(struct fotabuf *buf, u32 data)
- {
- u8 *pos = (u8 *) fotabuf_put(buf, 4);
- FOTA_PUT_BE32(pos, data);
- }
- static inline void fotabuf_put_data(struct fotabuf *buf, const void *data,
- size_t len)
- {
- if (data) {
- os_memcpy(fotabuf_put(buf, len), data, len);
- }
- }
- static inline void fotabuf_put_buf(struct fotabuf *dst,
- const struct fotabuf *src)
- {
- fotabuf_put_data(dst, fotabuf_head(src), fotabuf_len(src));
- }
- static inline void fotabuf_set(struct fotabuf *buf, const void *data, size_t len)
- {
- buf->buf = (u8 *) data;
- buf->flags = FOTABUF_FLAG_EXT_DATA;
- buf->size = buf->used = len;
- }
- static inline void fotabuf_put_str(struct fotabuf *dst, const char *str)
- {
- fotabuf_put_data(dst, str, os_strlen(str));
- }
- #endif /* FOTABUF_H */
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