alex/esp-idf
1
0
Fork 0
mirror of https://github.com/espressif/esp-idf.git synced 2025-08-10 04:43:33 +00:00
Code Issues Packages Projects Releases Wiki Activity

VFS: Implement pread() and pwrite()

Browse Source 
Closes https://github.com/espressif/esp-idf/issues/3515
This commit is contained in:
Roland Dobai
2019-07-01 11:08:57 +02:00
committed by bot
parent 1ea68e6093
commit 41062bea99
10 changed files with 307 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

84
components/fatfs/test/test_fatfs_common.c
View File

@@ -16,8 +16,10 @@
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <fcntl.h>
#include <sys/time.h>
#include <sys/unistd.h>
#include <sys/stat.h>
#include <errno.h>
#include <utime.h>
#include "unity.h"
@@ -98,6 +100,88 @@ void test_fatfs_read_file_utf_8(const char* filename)
TEST_ASSERT_EQUAL(0, fclose(f));
}
void test_fatfs_pread_file(const char* filename)
{
char buf[32] = { 0 };
const int fd = open(filename, O_RDONLY);
TEST_ASSERT_NOT_EQUAL(-1, fd);
int r = pread(fd, buf, sizeof(buf), 0); // it is a regular read() with offset==0
TEST_ASSERT_EQUAL(0, strcmp(fatfs_test_hello_str, buf));
TEST_ASSERT_EQUAL(strlen(fatfs_test_hello_str), r);
memset(buf, 0, sizeof(buf));
r = pread(fd, buf, sizeof(buf), 1); // offset==1
TEST_ASSERT_EQUAL(0, strcmp(fatfs_test_hello_str + 1, buf));
TEST_ASSERT_EQUAL(strlen(fatfs_test_hello_str) - 1, r);
memset(buf, 0, sizeof(buf));
r = pread(fd, buf, sizeof(buf), 5); // offset==5
TEST_ASSERT_EQUAL(0, strcmp(fatfs_test_hello_str + 5, buf));
TEST_ASSERT_EQUAL(strlen(fatfs_test_hello_str) - 5, r);
// regular read() should work now because pread() should not affect the current position in file
memset(buf, 0, sizeof(buf));
r = read(fd, buf, sizeof(buf)); // note that this is read() and not pread()
TEST_ASSERT_EQUAL(0, strcmp(fatfs_test_hello_str, buf));
TEST_ASSERT_EQUAL(strlen(fatfs_test_hello_str), r);
memset(buf, 0, sizeof(buf));
r = pread(fd, buf, sizeof(buf), 10); // offset==10
TEST_ASSERT_EQUAL(0, strcmp(fatfs_test_hello_str + 10, buf));
TEST_ASSERT_EQUAL(strlen(fatfs_test_hello_str) - 10, r);
memset(buf, 0, sizeof(buf));
r = pread(fd, buf, sizeof(buf), strlen(fatfs_test_hello_str) + 1); // offset to EOF
TEST_ASSERT_EQUAL(0, r);
TEST_ASSERT_EQUAL(0, close(fd));
}
static void test_pwrite(const char *filename, off_t offset, const char *msg)
{
const int fd = open(filename, O_WRONLY);
TEST_ASSERT_NOT_EQUAL(-1, fd);
const off_t current_pos = lseek(fd, 0, SEEK_END); // O_APPEND is not the same - jumps to the end only before write()
const int r = pwrite(fd, msg, strlen(msg), offset);
TEST_ASSERT_EQUAL(strlen(msg), r);
TEST_ASSERT_EQUAL(current_pos, lseek(fd, 0, SEEK_CUR)); // pwrite should not move the pointer
TEST_ASSERT_EQUAL(0, close(fd));
}
static void test_file_content(const char *filename, const char *msg)
{
char buf[32] = { 0 };
const int fd = open(filename, O_RDONLY);
TEST_ASSERT_NOT_EQUAL(-1, fd);
int r = read(fd, buf, sizeof(buf));
TEST_ASSERT_NOT_EQUAL(-1, r);
TEST_ASSERT_EQUAL(0, strcmp(msg, buf));
TEST_ASSERT_EQUAL(0, close(fd));
}
void test_fatfs_pwrite_file(const char *filename)
{
int fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC);
TEST_ASSERT_NOT_EQUAL(-1, fd);
TEST_ASSERT_EQUAL(0, close(fd));
test_pwrite(filename, 0, "Hello");
test_file_content(filename, "Hello");
test_pwrite(filename, strlen("Hello"), ", world!");
test_file_content(filename, "Hello, world!");
test_pwrite(filename, strlen("Hello, "), "Dolly");
test_file_content(filename, "Hello, Dolly!");
}
void test_fatfs_open_max_files(const char* filename_prefix, size_t files_count)
{
FILE** files = calloc(files_count, sizeof(FILE*));