ttail/src/include/ttail_search_files.h

#ifndef _ttail_search_files_h__
#define _ttail_search_files_h__

#include <errno.h>
#include <string.h>
#include <time.h>
#include <regex.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>

typedef struct _ttail_search_file_s ttail_search_file_t;


/*<! Private search session for logfiles */
struct _ttail_search_file_s
{
	/*<! logfile sizes */
	off_t *file_sz;
	#ifdef TTAIL_HUGE_FILE
	/*<! Shift width to apply on size to compute stuff */
	short sz_div;
	#endif
	/*<! Computed files start size */
	off_t *vfile;
	/*<! Computed file sizes sum */
	off_t vsz;
	/*<! Computed position */
	off_t vpos;

	char *buf;
	size_t buf_sz;
};

#include "config.h"
#include "ttail.h"
#include "ttail_search.h"

/**@brief Convenient wrapper for getline
 *@param ttail_t* TTAIL
 *@param size_t ID file id
 *@return @ref getline()
 */
#define ttail_getline(TTAIL, ID) (getline(\
	&(TTAIL->session->file.buf), &(TTAIL->session->file.buf_sz),\
	TTAIL->logfile[ID]))
/*<!Accessor to getline wrapper buffer */
#define ttail_getline_buf(TTAIL) (TTAIL->session->file.buf)

/**@brief @ref ttail_search_closest() implementation for logfiles
 *@param ttail_t*
 *@return 0 if ok -1 if fatal error 1 if not found
 */
int _ttail_search_closest_files(ttail_t*);
int _ttail_search_closest_files_init(ttail_t*);
int _ttail_search_closest_files_set_fsizes(ttail_t*);

/**@brief Test if files are sorted
 *
 *If not sorted attempt to sort them
 *@param ttail_t*
 *@return -1 not sorted 0 sorted
 */
int _ttail_search_file_sorted(ttail_t*);

/**@brief Attempt to reopen a file
 *@param ttail_t* ttail
 *@param size_t id file id in ttail
 *@return 0 on success, -1 on failure and errno is set
 *@throw EINVAL if id is too big
 */
int _ttail_file_reopen(ttail_t*, size_t);

/**@brief Search next line
 *
 *Set f pos to next line begining and return the position
 *@param FILE* f 
 *@return -1 on error 0 on EOF else return the next line position
 */
long _ttail_file_next_line(FILE*);

/**@brief Search line start
 *
 *Set f pos to line begining and return the position
 *@param FILE* f 
 *@return -1 on error else return the next line position
 */
long _ttail_file_start_line(FILE*);

/**@brief Free the ttail_search_file_t session
 *@param ttail_t* ttail
 */
void _ttail_search_file_free(ttail_t*);
#endif