mirror of
https://github.com/oliverschmidt/contiki.git
synced 2024-09-09 23:54:32 +00:00
Added file size
This commit is contained in:
parent
dd276a9c8a
commit
ea6f2942bd
@ -30,7 +30,7 @@
|
||||
*
|
||||
* Author: Adam Dunkels <adam@sics.se>
|
||||
*
|
||||
* $Id: cfs-ram.c,v 1.1 2006/06/17 22:41:15 adamdunkels Exp $
|
||||
* $Id: cfs-ram.c,v 1.2 2007/03/22 23:55:03 adamdunkels Exp $
|
||||
*/
|
||||
#include "contiki.h"
|
||||
|
||||
@ -43,12 +43,13 @@ struct filestate {
|
||||
#define FLAG_FILE_CLOSED 0
|
||||
#define FLAG_FILE_OPEN 1
|
||||
int fileptr;
|
||||
int filesize;
|
||||
};
|
||||
|
||||
#ifdef CFS_RAM_CONF_SIZE
|
||||
#define CFS_RAM_SIZE CFS_RAM_CONF_SIZE
|
||||
#else
|
||||
#define CFS_RAM_SIZE 512
|
||||
#define CFS_RAM_SIZE 4096
|
||||
#endif
|
||||
|
||||
static struct filestate file;
|
||||
@ -61,6 +62,9 @@ s_open(const char *n, int f)
|
||||
if(file.flag == FLAG_FILE_CLOSED) {
|
||||
file.flag = FLAG_FILE_OPEN;
|
||||
file.fileptr = 0;
|
||||
if((f & CFS_WRITE) && !(f & CFS_APPEND)) {
|
||||
file.filesize = 0;
|
||||
}
|
||||
return 1;
|
||||
} else {
|
||||
return -1;
|
||||
@ -80,6 +84,10 @@ s_read(int f, char *buf, unsigned int len)
|
||||
len = sizeof(filemem) - file.fileptr;
|
||||
}
|
||||
|
||||
if(file.fileptr + len > file.filesize) {
|
||||
len = file.filesize - file.fileptr;
|
||||
}
|
||||
|
||||
if(f == 1) {
|
||||
memcpy(buf, &filemem[file.fileptr], len);
|
||||
file.fileptr += len;
|
||||
@ -99,6 +107,11 @@ s_write(int f, char *buf, unsigned int len)
|
||||
len = sizeof(filemem) - file.fileptr;
|
||||
}
|
||||
|
||||
if(file.fileptr + len > file.filesize) {
|
||||
/* Extend the size of the file. */
|
||||
file.filesize = file.fileptr + len;
|
||||
}
|
||||
|
||||
if(f == 1) {
|
||||
memcpy(&filemem[file.fileptr], buf, len);
|
||||
file.fileptr += len;
|
||||
@ -112,8 +125,8 @@ static int
|
||||
s_seek(int f, unsigned int o)
|
||||
{
|
||||
if(f == 1) {
|
||||
if(o > sizeof(filemem)) {
|
||||
o = sizeof(filemem);
|
||||
if(o > file.filesize) {
|
||||
o = file.filesize;
|
||||
}
|
||||
file.fileptr = o;
|
||||
return o;
|
||||
@ -163,3 +176,9 @@ PROCESS_THREAD(cfs_ram_process, ev, data)
|
||||
PROCESS_END();
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
void
|
||||
cfs_ram_init(void)
|
||||
{
|
||||
process_start(&cfs_ram_process, NULL);
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
|
Loading…
Reference in New Issue
Block a user