ttail/src/ttail_search.c

#include "ttail_search.h"

int ttail_search_closest(ttail_t* ttail, const struct tm *tm)
{
	if(ttail->session != NULL)
	{
		fprintf(stderr, "A session is allready started\n");
		return -1;
	}
	/*
	ttail->session = (ttail_search_t*)malloc(ttail->logfile_sz?
		sizeof(ttail_search_file_t):sizeof(ttail_search_stdin_t));
	if(!ttail->session)
	{
		perror("Unable to allocate memory for search session");
		return -1;
	}
	*/
	return ttail->logfile_sz?\
		_ttail_search_closest_files(ttail, tm):\
		_ttail_search_closest_stdin(ttail, tm);
}

int _ttail_search_closest_stdin(ttail_t* t, const struct tm* tm)
{
	return 0;
}

int ttail_logline2date(ttail_t* ttail, const char* logline, struct tm* tm)
{
	const char *subst, *ret;

	memset(tm, 0,sizeof(struct tm));

	subst = ttail_logline_subst(ttail, logline);
	if(!subst)
	{
		memset(tm, 0,sizeof(struct tm));
		return 1;
	}
	ret = strptime(subst, ttail->fmt, tm);
	if(!ret)
	{
		memset(tm, 0,sizeof(struct tm));
		return 2;
	}
	return 0;
}

const char* ttail_logline_subst(ttail_t* t, const char* logline)
{
	regmatch_t pmatch[1];
	size_t nmatch;
	int ret;
	char err[1024];

	if(t->prefix_sz >= 0)
	{
		/* constant subst */
		return strlen(logline) < t->prefix_sz ? \
			NULL:logline + t->prefix_sz;
	}
	/* regex subst */
	nmatch=1;
	ret = regexec(&(t->date_prefix), logline, nmatch, pmatch, 0);\
	if(ret)
	{
		regerror(ret, &(t->date_prefix), err,1024);
		fprintf(stderr, "Exec error : %s\n", err);
		return NULL;
	}
	return logline + pmatch[0].rm_eo;
}

int ttail_tm_cmp(const struct tm *ta, const struct tm *tb)
{
	int r;
	r = ta->tm_year - tb->tm_year;
	if(r) { return r; }
	r = ta->tm_mon - tb->tm_mon;
	if(r) { return r; }
	r = ta->tm_mday - tb->tm_mday;
	if(r) { return r; }
	r = ta->tm_hour - tb->tm_hour;
	if(r) { return r; }
	r = ta->tm_min - tb->tm_min;
	if(r) { return r; }
	r = ta->tm_sec - tb->tm_sec;
	return r;
}