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/*
* wiggle - apply rejected patches
*
* Copyright (C) 2003 Neil Brown <neilb@cse.unsw.edu.au>
*
*
* 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 02111-1307 USA
*
* Author: Neil Brown
* Email: <neilb@suse.de>
*/
/*
* read in files
*
* Files are read in whole and stored in a
* struct stream {char*, len}
*
*
* loading the file "-" reads from stdin which might require
* reading into several buffers
*/
#include "wiggle.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <malloc.h>
static void join_streams(struct stream list[], int cnt)
{
/* join all the streams in the list (upto body=NULL)
* into one by re-allocing list[0].body and copying
*/
int len=0;
int i;
char *c;
for (i=0; i<cnt ; i++)
len += list[i].len;
c = realloc(list[0].body, len);
if (c == NULL)
die();
list[0].body = c;
c += list[0].len;
list[0].len = len;
for (i=1; i<cnt; i++) {
memcpy(c, list[i].body, list[i].len);
c += list[i].len;
list[i].len = 0;
}
}
static struct stream load_regular(int fd)
{
struct stat stb;
struct stream s;
fstat(fd, &stb);
s.len = stb.st_size;
s.body = malloc(s.len);
if (s.body) {
if (read(fd, s.body, s.len) != s.len) {
free(s.body);
s.body = NULL;
}
} else die();
return s;
}
static struct stream load_other(int fd)
{
struct stream list[10];
int i = 0;
while(1) {
list[i].body = malloc(8192);
if (!list[i].body)
die();
list[i].len = read(fd, list[i].body, 8192);
if (list[i].len < 0)
die();
if (list[i].len == 0)
break;
i++;
if (i == 10) {
join_streams(list, i);
i = 1;
}
}
join_streams(list, i);
return list[0];
}
struct stream load_file(char *name)
{
struct stream s;
struct stat stb;
int fd;
s.body = NULL;
s.len = 0;
if (strcmp(name, "-")==0)
fd = 0;
else {
fd = open(name, O_RDONLY);
if (fd <0)
return s;
}
if (fstat(fd, &stb) == 0) {
if (S_ISREG(stb.st_mode))
s = load_regular(fd);
else
s = load_other(fd);
}
close(fd);
return s;
}
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