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#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <time.h>
#include <sys/time.h>
#include <glib.h>
#include "file.h"
#include "item.h"
#include "debug.h"
#include "log.h"
struct log_data {
int len;
int max_len;
char *data;
};
struct log {
FILE *f;
int overwrite;
int empty;
int flush_size;
int flush_time;
guint timer;
struct timeval last_flush;
char *filename;
char *filename_ex1;
char *filename_ex2;
struct log_data header;
struct log_data data;
struct log_data trailer;
struct attr **attrs;
};
static void
strftime_localtime(char *buffer, int size, char *fmt)
{
time_t t;
struct tm *tm;
t=time(NULL);
tm=localtime(&t);
strftime(buffer, 4096, fmt, tm);
}
static void
expand_filenames(struct log *this_)
{
char buffer[4096];
int i;
strftime_localtime(buffer, 4096, this_->filename);
this_->filename_ex1=g_strdup(buffer);
if (strstr(this_->filename_ex1,"%i")) {
i=0;
do {
g_free(this_->filename_ex2);
this_->filename_ex2=g_strdup_printf(this_->filename_ex1,i++);
} while (file_exists(this_->filename_ex2));
} else
this_->filename_ex2=g_strdup(this_->filename_ex1);
}
static void
log_open(struct log *this_)
{
char *mode;
if (this_->overwrite)
mode="w";
else
mode="r+";
this_->f=fopen(this_->filename_ex2, mode);
if (! this_->f)
this_->f=fopen(this_->filename_ex2, "w");
if (!this_->overwrite)
fseek(this_->f, 0, SEEK_END);
this_->empty = !ftell(this_->f);
}
static void
log_close(struct log *this_)
{
if (this_->trailer.len)
fwrite(this_->trailer.data, 1, this_->trailer.len, this_->f);
fflush(this_->f);
fclose(this_->f);
this_->f=NULL;
}
static void
log_flush(struct log *this_)
{
long pos;
if (this_->empty) {
if (this_->header.len)
fwrite(this_->header.data, 1, this_->header.len, this_->f);
if (this_->header.len || this_->data.len)
this_->empty=0;
}
fwrite(this_->data.data, 1, this_->data.len, this_->f);
if (this_->trailer.len) {
pos=ftell(this_->f);
if (pos > 0) {
fwrite(this_->trailer.data, 1, this_->trailer.len, this_->f);
fseek(this_->f, pos, SEEK_SET);
}
}
fflush(this_->f);
g_free(this_->data.data);
this_->data.data=NULL;
this_->data.max_len=this_->data.len=0;
gettimeofday(&this_->last_flush, NULL);
}
static int
log_flush_required(struct log *this_)
{
return this_->data.len > this_->flush_size;
}
static void
log_change(struct log *this_)
{
log_flush(this_);
log_close(this_);
log_open(this_);
}
static int
log_change_required(struct log *this_)
{
char buffer[4096];
strftime_localtime(buffer, 4096, this_->filename);
return (strcmp(this_->filename_ex1, buffer) != 0);
}
static gboolean
log_timer(gpointer data)
{
struct log *this_=data;
struct timeval tv;
int delta;
gettimeofday(&tv, NULL);
delta=(tv.tv_sec-this_->last_flush.tv_sec)*1000+(tv.tv_usec-this_->last_flush.tv_usec)/1000;
dbg(0,"delta=%d flush_time=%d\n", delta, this_->flush_time);
if (this_->flush_time && delta > this_->flush_time*1000)
log_flush(this_);
return TRUE;
}
int
log_get_attr(struct log *this_, enum attr_type type, struct attr *attr, struct attr_iter *iter)
{
return attr_generic_get_attr(this_->attrs, type, attr, iter);
}
struct log *
log_new(struct attr **attrs)
{
struct log *ret=g_new0(struct log, 1);
struct attr *data,*overwrite,*flush_size,*flush_time;
dbg(1,"enter\n");
data=attr_search(attrs, NULL, attr_data);
if (! data)
return NULL;
ret->filename=g_strdup(data->u.str);
overwrite=attr_search(attrs, NULL, attr_overwrite);
if (overwrite)
ret->overwrite=overwrite->u.num;
flush_size=attr_search(attrs, NULL, attr_flush_size);
if (flush_size)
ret->flush_size=flush_size->u.num;
flush_time=attr_search(attrs, NULL, attr_flush_time);
if (flush_time)
ret->flush_time=flush_time->u.num;
if (ret->flush_time) {
dbg(0,"interval %d\n", ret->flush_time*1000);
ret->timer=g_timeout_add(ret->flush_time*1000, log_timer, ret);
}
expand_filenames(ret);
log_open(ret);
gettimeofday(&ret->last_flush, NULL);
ret->attrs=attr_list_dup(attrs);
return ret;
}
void
log_set_header(struct log *this_, char *data, int len)
{
this_->header.data=g_malloc(len);
this_->header.max_len=this_->header.len=len;
memcpy(this_->header.data, data, len);
}
void
log_set_trailer(struct log *this_, char *data, int len)
{
this_->trailer.data=g_malloc(len);
this_->trailer.max_len=this_->trailer.len=len;
memcpy(this_->trailer.data, data, len);
}
void
log_write(struct log *this_, char *data, int len)
{
dbg(1,"enter\n");
if (log_change_required(this_))
log_change(this_);
if (this_->data.len + len > this_->data.max_len) {
dbg(2,"overflow\n");
this_->data.max_len+=16384;
this_->data.data=g_realloc(this_->data.data,this_->data.max_len);
}
memcpy(this_->data.data+this_->data.len, data, len);
this_->data.len+=len;
if (log_flush_required(this_))
log_flush(this_);
}
void
log_destroy(struct log *this_)
{
if (this_->timer)
g_source_remove(this_->timer);
log_flush(this_);
log_close(this_);
g_free(this_);
}
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