/*
* SARG Squid Analysis Report Generator http://sarg.sourceforge.net
* 1998, 2010
*
* SARG donations:
* please look at http://sarg.sourceforge.net/donations.php
* Support:
* http://sourceforge.net/projects/sarg/forums/forum/363374
* ---------------------------------------------------------------------
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
*
*/
#include "include/conf.h"
#include "include/defs.h"
#define INITIAL_LINE_BUFFER_SIZE 32768
struct longlinestruct
{
//! The buffer to store the data read from the log file.
char *buffer;
//! The size of the buffer.
size_t size;
//! The number of bytes stored in the buffer.
size_t length;
//! The position of the beginning of the current string.
size_t start;
//! The position of the end of the current string.
size_t end;
};
longline longline_create(void)
{
longline line;
line=malloc(sizeof(*line));
if (line==NULL) return(NULL);
line->size=INITIAL_LINE_BUFFER_SIZE;
line->buffer=malloc(line->size);
if (line->buffer==NULL) {
free(line);
return(NULL);
}
line->start=0;
line->end=0;
line->length=0;
return(line);
}
void longline_reset(longline line)
{
if (line!=NULL) {
line->start=0;
line->end=0;
line->length=0;
}
}
char *longline_read(FILE *fp_in,longline line)
{
int i;
char *newbuf;
size_t nread;
if (line==NULL || line->buffer==NULL) return(NULL);
while (true) {
for (i=line->end ; i<line->length && (line->buffer[i]=='\n' || line->buffer[i]=='\r') ; i++);
if (i<line->length) {
line->end=i;
break;
}
nread=(feof(fp_in)!=0) ? 0 : fread(line->buffer,1,line->size,fp_in);
if (nread==0) return(NULL);
line->length=nread;
line->end=0;
}
line->start=line->end;
while (true) {
for (i=line->end ; i<line->length ; i++) {
if ((unsigned char)line->buffer[i]>=' ') continue;
if (line->buffer[i]=='\n' || line->buffer[i]=='\r') break;
}
line->end=i;
if (line->end<line->length) break;
if (line->start>0) {
for (i=line->start ; i<line->length ; i++) line->buffer[i-line->start]=line->buffer[i];
line->length-=line->start;
line->end-=line->start;
line->start=0;
}
if (line->length>=line->size) {
line->size+=8192;
newbuf=realloc(line->buffer,line->size);
if (!newbuf) {
debuga(_("Not enough memory to read one more line from the input log file\n"));
exit(EXIT_FAILURE);
}
line->buffer=newbuf;
}
nread=(feof(fp_in)!=0) ? 0 : fread(line->buffer+line->length,1,line->size-line->length,fp_in);
if (nread==0) {
if (line->end<=line->start) return(NULL);
if (line->end>=line->size) {
line->end=line->size;
line->size++;
newbuf=realloc(line->buffer,line->size);
if (!newbuf) {
debuga(_("Not enough memory to read one more line from the input log file\n"));
exit(EXIT_FAILURE);
}
line->buffer=newbuf;
}
line->buffer[line->end]='\0';
return(line->buffer+line->start);
}
line->length+=nread;
}
line->buffer[line->end++]='\0';
return(line->buffer+line->start);
}
void longline_destroy(longline *line_ptr)
{
longline line;
if (line_ptr==NULL || *line_ptr==NULL) return;
line=*line_ptr;
*line_ptr=NULL;
if (line->buffer!=NULL) free(line->buffer);
free(line);
}