util-buffer.h File Reference

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Data Structures
struct	MemBuffer_

Macros
#define	MEMBUFFER_BUFFER(mem_buffer)   (mem_buffer)->buffer
	Get the MemBuffers underlying buffer. More...
#define	MEMBUFFER_OFFSET(mem_buffer)   (mem_buffer)->offset
	Get the MemBuffers current offset. More...
#define	MEMBUFFER_SIZE(mem_buffer)   (mem_buffer)->size
	Get the MemBuffers current size. More...

Typedefs
typedef struct MemBuffer_	MemBuffer

Functions
MemBuffer *	MemBufferCreateNew (uint32_t size)
int	MemBufferExpand (MemBuffer **buffer, uint32_t expand_by)
	expand membuffer by size of 'expand_by' More...
void	MemBufferFree (MemBuffer *buffer)
void	MemBufferPrintToFP (MemBuffer *buffer, FILE *fp)
	Write a buffer to the file pointer. More...
size_t	MemBufferPrintToFPAsString (MemBuffer *b, FILE *fp)
	Write a buffer to the file pointer as a printable char string. More...
void	MemBufferPrintToFPAsHex (MemBuffer *b, FILE *fp)
	Write a buffer in hex format. More...
uint32_t	MemBufferWriteRaw (MemBuffer *dst, const uint8_t *raw, const uint32_t raw_len)
	Write a raw buffer to the MemBuffer dst. More...
void	MemBufferWriteString (MemBuffer *dst, const char *fmt,...) ATTR_FMT_PRINTF(2
	Write a string buffer to the Membuffer dst. More...

Detailed Description

Author

Anoop Saldanha anoop.nosp@m.sald.nosp@m.anha@.nosp@m.gmai.nosp@m.l.com

Definition in file util-buffer.h.

Macro Definition Documentation

MEMBUFFER_BUFFER

#define MEMBUFFER_BUFFER

(

mem_buffer

)

(mem_buffer)->buffer

Get the MemBuffers underlying buffer.

Definition at line 52 of file util-buffer.h.

MEMBUFFER_OFFSET

#define MEMBUFFER_OFFSET

(

mem_buffer

)

(mem_buffer)->offset

Get the MemBuffers current offset.

Definition at line 57 of file util-buffer.h.

MEMBUFFER_SIZE

#define MEMBUFFER_SIZE

(

mem_buffer

)

(mem_buffer)->size

Get the MemBuffers current size.

Definition at line 62 of file util-buffer.h.

Typedef Documentation

MemBuffer

typedef struct MemBuffer_ MemBuffer

Function Documentation

MemBufferCreateNew()

MemBuffer* MemBufferCreateNew

(

uint32_t

size

)

Definition at line 32 of file util-buffer.c.

References MAX_LIMIT, SC_EINVAL, SC_ENOMEM, sc_errno, SC_OK, SCCalloc, SCLogWarning, and unlikely.

Referenced by CreateEveThreadCtx(), JsonLogThreadInit(), LogHttpLogThreadInit(), LogStatsLogThreadInit(), and LogTcpDataLogThreadInit().

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MemBufferExpand()

int MemBufferExpand	(	MemBuffer **	buffer,
		uint32_t	expand_by
	)

expand membuffer by size of 'expand_by'

If expansion failed, buffer will still be valid.

Return values

result

0 ok, -1 expansion failed

Definition at line 60 of file util-buffer.c.

References MAX_LIMIT, SCLogDebug, SCLogWarning, SCRealloc, MemBuffer_::size, and unlikely.

Referenced by OutputJSONMemBufferCallback().

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MemBufferFree()

void MemBufferFree

(

MemBuffer *

buffer

)

Definition at line 86 of file util-buffer.c.

References SCFree.

Referenced by CreateEveThreadCtx(), FreeEveThreadCtx(), JsonLogThreadInit(), LogHttpLogThreadDeinit(), LogStatsLogThreadDeinit(), and LogTcpDataLogThreadDeinit().

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MemBufferPrintToFP()

void MemBufferPrintToFP	(	MemBuffer *	buffer,
		FILE *	fp
	)

Write a buffer to the file pointer.

   Accepted buffers can contain both printable and non-printable
   characters.  Printable characters are written in the printable
   format and the non-printable chars are written in hex codes
   using the |XX| format.

   For example this would be the kind of output in the file -
   onetwo|EF|three|ED|five

Parameters

buffer	Pointer to the src MemBuffer instance to write.
fp	Pointer to the file instance to write to.

Definition at line 91 of file util-buffer.c.

References MemBuffer_::buffer, and MemBuffer_::offset.

MemBufferPrintToFPAsHex()

void MemBufferPrintToFPAsHex	(	MemBuffer *	b,
		FILE *	fp
	)

Write a buffer in hex format.

Parameters

b	Pointer to the src MemBuffer instance to write.
fp	Pointer to the file instance to write to.

Definition at line 106 of file util-buffer.c.

References MemBuffer_::buffer, and MEMBUFFER_OFFSET.

MemBufferPrintToFPAsString()

size_t MemBufferPrintToFPAsString	(	MemBuffer *	b,
		FILE *	fp
	)

Write a buffer to the file pointer as a printable char string.

Parameters

b	Pointer to the src MemBuffer instance to write.
fp	Pointer to the file instance to write to.

Return values

size_t

bytes written by fwrite()

Definition at line 101 of file util-buffer.c.

References MEMBUFFER_BUFFER, and MEMBUFFER_OFFSET.

MemBufferWriteRaw()

uint32_t MemBufferWriteRaw	(	MemBuffer *	dst,
		const uint8_t *	raw,
		const uint32_t	raw_len
	)

Write a raw buffer to the MemBuffer dst.

   When we say raw buffer it indicates a buffer that need not be
   purely a string buffer.  It can be a pure string buffer or not or
   a mixture of both.  Hence we don't accept any format strings.

   If the remaining space on the buffer is lesser than the length of
   the buffer to write, it is truncated to fit into the empty space.

   Also after every write a '\0' is appended.  This would indicate
   that the total available space to write in the buffer is
   MemBuffer->size - 1 and not Membuffer->size.  The reason we
   append the '\0' is for supporting writing pure string buffers
   as well, that can later be used by other string handling funcs.

Parameters

raw_buffer	The buffer to write.
raw_buffer_len	Length of the above buffer.

Return values

write_len

Bytes written. If less than raw_len, the buffer is full.

Definition at line 115 of file util-buffer.c.

References dst, and SCLogDebug.

Referenced by OutputJSONBuffer(), and OutputJSONMemBufferCallback().

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MemBufferWriteString()

void MemBufferWriteString	(	MemBuffer *	dst,
		const char *	fmt,
			...
	)

Write a string buffer to the Membuffer dst.

   This function takes a format string and arguments for the format
   string like sprintf.

   An example usage of this is -
   MemBufferWriteString(mem_buffer_instance, \"%d - %s\", 10, \"one\");

Parameters

dst	The dst MemBuffer instance.
format	The format string.
...	Variable arguments.