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update file example.

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git-svn-id: https://rt-thread.googlecode.com/svn/trunk@408 bbd45198-f89e-11dd-88c7-29a3b14d5316
This commit is contained in:
bernard.xiong
2010-02-11 15:59:25 +00:00
parent 2f3882c714
commit 3c831420de
4 changed files with 111 additions and 7 deletions
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1
examples/file/listdir.c
View File

@@ -14,6 +14,7 @@
#include <rtthread.h>
#include <dfs_posix.h>
static char fullpath[256];
void list_dir(const char* path)
{
DIR *dir;

4
examples/file/readspeed.c
View File

@@ -22,7 +22,7 @@ void readspeed(const char* filename, int block_size)
rt_size_t total_length;
rt_tick_t tick;
fd = open(filename, 0, DFS_O_RDONLY);
fd = open(filename, 0, O_RDONLY);
if (fd < 0)
{
rt_kprintf("open file:%s failed\n", filename);
@@ -45,7 +45,7 @@ void readspeed(const char* filename, int block_size)
int length;
length = read(fd, buff_ptr, block_size);
if (length == 0) break;
if (length <= 0) break;
total_length += length;
}
tick = rt_tick_get() - tick;

91
examples/file/readwrite.c
View File

@@ -14,18 +14,105 @@
#include <rtthread.h>
#include <dfs_posix.h>
#define TEST_FN "/test.dat"
static char test_data[120], buffer[120];
/* <20>ļ<EFBFBD><C4BC><EFBFBD>д<EFBFBD><D0B4><EFBFBD><EFBFBD> */
void readwrite(const char* filename)
{
int fd;
int index, length;
/* ֻд<D6BB><D0B4><EFBFBD><EFBFBD> */
/* ֻд & <20><><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
fd = open(TEST_FN, O_WRONLY | O_CREAT | O_TRUNC, 0);
if (fd < 0)
{
rt_kprintf("open file for write failed\n");
return;
}
/* ׼<><D7BC>д<EFBFBD><D0B4><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
for (index = 0; index < sizeof(test_data); index ++)
{
test_data[index] = index + 27;
}
/* д<><D0B4><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
length = write(fd, test_data, sizeof(test_data));
if (length != sizeof(test_data))
{
rt_kprintf("write data failed\n");
close(fd);
return;
}
/* <20>ر<EFBFBD><D8B1>ļ<EFBFBD> */
close(fd);
/* ֻд<D6BB><D0B4><EFBFBD><EFBFBD>ĩβ<C4A9><CEB2><EFBFBD>Ӵ<EFBFBD><D3B4><EFBFBD> */
fd = open(TEST_FN, O_WRONLY | O_CREAT | O_APPEND, 0);
if (fd < 0)
{
rt_kprintf("open file for append write failed\n");
return;
}
length = write(fd, test_data, sizeof(test_data));
if (length != sizeof(test_data))
{
rt_kprintf("append write data failed\n");
close(fd);
return;
}
/* <20>ر<EFBFBD><D8B1>ļ<EFBFBD> */
close(fd);
/* ֻ<><D6BB><EFBFBD>򿪽<EFBFBD><F2BFAABD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD><D0A3> */
fd = open(TEST_FN, O_RDONLY, 0);
if (fd < 0)
{
rt_kprintf("check: open file for read failed\n");
return;
}
/* lseek<65><6B><EFBFBD>ԣ<EFBFBD><D4A3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD><D0A3><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
length = read(fd, buffer, sizeof(buffer));
if (length != sizeof(buffer))
{
rt_kprintf("check: read file failed\n");
close(fd);
return;
}
for (index = 0; index < sizeof(test_data); index ++)
{
if (test_data[index] != buffer[index])
{
rt_kprintf("check: check data failed at %d\n", index);
close(fd);
return;
}
}
length = read(fd, buffer, sizeof(buffer));
if (length != sizeof(buffer))
{
rt_kprintf("check: read file failed\n");
close(fd);
return;
}
for (index = 0; index < sizeof(test_data); index ++)
{
if (test_data[index] != buffer[index])
{
rt_kprintf("check: check data failed at %d\n", index);
close(fd);
return;
}
}
/* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϣ<EFBFBD><CFA3>ر<EFBFBD><D8B1>ļ<EFBFBD> */
close(fd);
/* <20><>ӡ<EFBFBD><D3A1><EFBFBD><EFBFBD> */
rt_kprintf("read/write done.\n");
}
#ifdef RT_USING_FINSH

22
examples/file/writespeed.c
View File

@@ -16,11 +16,11 @@
void writespeed(const char* filename, int total_length, int block_size)
{
int fd;
int fd, index, length;
char *buff_ptr;
rt_tick_t tick;
fd = open(filename, 0, O_WRONLY);
fd = open(filename, O_WRONLY | O_WRONLY | O_TRUNC, 0);
if (fd < 0)
{
rt_kprintf("open file:%s failed\n", filename);
@@ -37,9 +37,25 @@ void writespeed(const char* filename, int total_length, int block_size)
}
/* prepare write data */
for (index = 0; index < block_size; index++)
{
buff_ptr[index] = index;
}
index = 0;
/* get the beginning tick */
tick = rt_tick_get();
while (index < total_length / block_size)
{
length = write(fd, buff_ptr, block_size);
if (length != block_size)
{
rt_kprintf("write failed\n");
break;
}
index ++;
}
tick = rt_tick_get() - tick;
/* close file and release memory */