/*
* Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).
* All rights reserved.
* This component and the accompanying materials are made available
* under the terms of "Eclipse Public License v1.0"
* which accompanies this distribution, and is available
* at the URL "http://www.eclipse.org/legal/epl-v10.html".
*
* Initial Contributors:
* Nokia Corporation - initial contribution.
*
* Contributors:
*
* Description:
*
*/
/* $NetBSD: file.c,v 1.2 2006/05/15 21:12:21 rillig Exp $ */
/*-
* Copyright (c) 1999 James Howard and Dag-Erling Codan Smrgrav
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: file.c,v 1.2 2006/05/15 21:12:21 rillig Exp $");
#endif /* not lint */
#define FILE_C
#include "grep.h"
#define FILE_STDIO 0
#define FILE_MMAP 1
#define FILE_GZIP 2
#define ZEXTERN extern
struct file {
int type;
FILE *f;
mmf_t *mmf;
#ifndef __SYMBIAN32__
gzFile *gzf;
#endif
};
char fname[MAXPATHLEN];
char *lnbuf;
size_t lnbuflen;
/* Get a line from the file*/
extern char *fgetln(FILE *f, size_t *len)
{
size_t n;
int c;
for (n = 0; ; ++n) {
c = getc(f);
if ((c == EOF)) {
if (feof(f))
break;
err(2, "%s", fname);
/* ERROR */
}
if (c == line_endchar)
break;
if (n >= lnbuflen) {
lnbuflen *= 2;
lnbuf = (char *)grep_realloc(lnbuf, ++lnbuflen);
}
if(c=='\r')
{
n--;
}
else
lnbuf[n] = c;
}
if (feof(f) && n == 0)
return NULL;
*len = n;
return lnbuf;
}
/* Get aline of data from the file*/
static char *
grepfgetln(FILE *f, size_t *len)
{
size_t n;
int c;
for (n = 0; ; ++n) {
c = getc(f);
if (c == EOF) {
if (feof(f))
break;
err(2, "%s", fname);
/* ERROR */
}
if (c == line_endchar)
break;
if (n >= lnbuflen) {
lnbuflen *= 2;
lnbuf = (char *)grep_realloc(lnbuf, ++lnbuflen);
}
lnbuf[n] = c;
}
if (feof(f) && n == 0)
return NULL;
*len = n;
return lnbuf;
}
#ifndef __SYMBIAN32__
/* Get a line from the gz file*/
static char *
gzfgetln(gzFile *f, size_t *len)
{
size_t n;
int c;
for (n = 0; ; ++n) {
c = gzgetc(f);
if (c == -1) {
const char *gzerrstr;
int gzerr;
if (gzeof(f))
break;
gzerrstr = gzerror(f, &gzerr);
if (gzerr == Z_ERRNO)
err(2, "%s", fname);
else
errx(2, "%s: %s", fname, gzerrstr);
}
if (c == line_endchar)
break;
if (n >= lnbuflen) {
lnbuflen *= 2;
lnbuf = (char *)grep_realloc(lnbuf, ++lnbuflen);
}
lnbuf[n] = c;
}
if (gzeof(f) && n == 0)
return NULL;
*len = n;
return lnbuf;
}
#endif
/* Open the file in read mode*/
file_t *
grep_fdopen(int fd, const char *mode)
{
file_t *f;
if (fd == 0)
sprintf(fname, "(standard input)");
else
sprintf(fname, "(fd %d)", fd);
f = (struct file *)grep_malloc(sizeof *f);
#ifndef __SYMBIAN32__
if (zgrep) {
f->type = FILE_GZIP;
if ((f->gzf = gzdopen(fd, mode)) != NULL)
return f;
} else
#endif
{
f->type = FILE_STDIO;
if ((f->f = fdopen(fd, mode)) != NULL)
return f;
}
free(f);
return NULL;
}
/* Open the file in read mode depending on the type*/
file_t *
grep_open(const char *path, const char *mode)
{
file_t *f;
snprintf(fname, MAXPATHLEN, "%s", path);
f = (struct file *)grep_malloc(sizeof *f);
#ifndef __SYMBIAN32__
if (zgrep) {
f->type = FILE_GZIP;
if ((f->gzf = gzopen(fname, mode)) != NULL)
return f;
}
else
#endif
{
/* try mmap first; if it fails, try stdio */
if ((f->mmf = mmopen(fname, mode)) != NULL) {
f->type = FILE_MMAP;
return f;
}
f->type = FILE_STDIO;
if ((f->f = fopen(path, mode)) != NULL)
return f;
}
free(f);
return NULL;
}
/* Check if the file is binary*/
int
grep_bin_file(file_t *f)
{
switch (f->type) {
case FILE_STDIO:
return bin_file(f->f);
case FILE_MMAP:
return mmbin_file(f->mmf);
#ifndef __SYMBIAN32__
case FILE_GZIP:
return gzbin_file(f->gzf);
#endif
default:
/* can't happen */
errx(2, "invalid file type");
}
return -1;
}
/*Get a line from the file */
char *
grep_fgetln(file_t *f, size_t *l)
{
switch (f->type) {
case FILE_STDIO:
if (line_endchar == '\n')
return fgetln(f->f, l);
else
return grepfgetln(f->f, l);
case FILE_MMAP:
return mmfgetln(f->mmf, l);
#ifndef __SYMBIAN32__
case FILE_GZIP:
return gzfgetln(f->gzf, l);
#endif
default:
/* can't happen */
errx(2, "invalid file type");
}
return NULL;
}
/* Close the file depending on the type*/
void
grep_close(file_t *f)
{
switch (f->type) {
case FILE_STDIO:
fclose(f->f);
break;
case FILE_MMAP:
mmclose(f->mmf);
break;
#ifndef __SYMBIAN32__
case FILE_GZIP:
gzclose(f->gzf);
break;
#endif
default:
/* can't happen */
errx(2, "invalid file type");
}
}