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u_cell_file.c
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u_cell_file.c
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/*
* Copyright 2019-2024 u-blox
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* Only #includes of u_* and the C standard library are allowed here,
* no platform stuff and no OS stuff. Anything required from
* the platform/OS must be brought in through u_port* to maintain
* portability.
*/
/** @file
* @brief Implementation of the file system API for cellular.
*/
#ifdef U_CFG_OVERRIDE
# include "u_cfg_override.h" // For a customer's configuration override
#endif
#include "stdio.h" // snprintf()
#include "stdlib.h" // strol(), atoi(), strol(), strtof()
#include "stddef.h" // NULL, size_t etc.
#include "stdint.h" // int32_t etc.
#include "stdbool.h"
#include "string.h" // memset(), strncpy(), strtok_r(), strtol()
#include "u_cfg_sw.h"
#include "u_error_common.h"
#include "u_port.h"
#include "u_port_os.h"
#include "u_port_debug.h"
#include "u_port_heap.h"
#include "u_timeout.h"
#include "u_at_client.h"
#include "u_cell_module_type.h"
#include "u_cell_net.h"
#include "u_cell_file.h"
#include "u_cell_private.h"
/* ----------------------------------------------------------------
* VARIABLES
* -------------------------------------------------------------- */
/** Root of the linked list of files container,
* used when reading the list of stored files on file system.
*/
static uCellPrivateFileListContainer_t *gpFileList = NULL;
/* ----------------------------------------------------------------
* STATIC FUNCTIONS
* -------------------------------------------------------------- */
// Open a file, LEXI-R10 style, returning handle or error code on failure.
static int32_t openFileLexiR10(uCellPrivateInstance_t *pInstance, const char *pFileName)
{
int32_t fileHandle = 0;
uAtClientHandle_t atHandle = pInstance->atHandle;
char *pBuffer = NULL;
int32_t errorCode = U_ERROR_COMMON_NO_MEMORY;
pBuffer = (char *) pUPortMalloc(pInstance->pModule->cellFileNameMaxLength + 1);
if (pBuffer != NULL) {
uAtClientLock(atHandle);
uAtClientCommandStart(atHandle, "AT+FOPEN?");
uAtClientCommandStop(atHandle);
uAtClientResponseStart(atHandle, "+FOPEN: ");
// file name
uAtClientReadString(atHandle, pBuffer, sizeof(pBuffer), false);
// read the file handle
fileHandle = uAtClientReadInt(atHandle);
uAtClientResponseStop(atHandle);
errorCode = uAtClientUnlock(atHandle);
if ((errorCode == 0) && (fileHandle > 0) && (strcmp(pBuffer, pFileName) == 0)) {
// File is already open
errorCode = fileHandle;
} else {
// Open the file
uAtClientLock(atHandle);
uAtClientCommandStart(atHandle, "AT+FOPEN=");
// Write file name
uAtClientWriteString(atHandle, pFileName, true);
// Mode to open the file:
uAtClientWriteInt(atHandle, 0);
uAtClientCommandStop(atHandle);
// Wait for the file handle to be received in response.
uAtClientResponseStart(atHandle, "+FOPEN: ");
fileHandle = uAtClientReadInt(atHandle);
uAtClientResponseStop(atHandle);
errorCode = uAtClientUnlock(atHandle);
if (errorCode == 0) {
errorCode = fileHandle;
}
}
uPortFree(pBuffer);
}
return errorCode;
}
/* ----------------------------------------------------------------
* PUBLIC FUNCTIONS: WORKAROUND FOR LINKER ISSUE
* -------------------------------------------------------------- */
void uCellFilePrivateLink()
{
//dummy
}
/* ----------------------------------------------------------------
* PUBLIC FUNCTIONS
* -------------------------------------------------------------- */
// Set the tagged area of the file system that future calls will use.
int32_t uCellFileSetTag(uDeviceHandle_t cellHandle, const char *pTag)
{
int32_t errorCode = (int32_t) U_ERROR_COMMON_NOT_INITIALISED;
uCellPrivateInstance_t *pInstance;
if (gUCellPrivateMutex != NULL) {
U_PORT_MUTEX_LOCK(gUCellPrivateMutex);
pInstance = pUCellPrivateGetInstance(cellHandle);
errorCode = (int32_t) U_ERROR_COMMON_INVALID_PARAMETER;
if (pInstance != NULL) {
errorCode = (int32_t) U_ERROR_COMMON_NOT_SUPPORTED;
if (U_CELL_PRIVATE_HAS(pInstance->pModule,
U_CELL_PRIVATE_FEATURE_FILE_SYSTEM_TAG)) {
pInstance->pFileSystemTag = pTag;
errorCode = (int32_t) U_ERROR_COMMON_SUCCESS;
}
}
U_PORT_MUTEX_UNLOCK(gUCellPrivateMutex);
}
return errorCode;
}
// Get the file system tag that is currently in use.
const char *pUCellFileGetTag(uDeviceHandle_t cellHandle)
{
uCellPrivateInstance_t *pInstance;
const char *pFileSystemTag = NULL;
if (gUCellPrivateMutex != NULL) {
U_PORT_MUTEX_LOCK(gUCellPrivateMutex);
pInstance = pUCellPrivateGetInstance(cellHandle);
if (pInstance != NULL) {
pFileSystemTag = pInstance->pFileSystemTag;
}
U_PORT_MUTEX_UNLOCK(gUCellPrivateMutex);
}
return pFileSystemTag;
}
// Write data into the file.
int32_t uCellFileWrite(uDeviceHandle_t cellHandle,
const char *pFileName,
const char *pData,
size_t dataSize)
{
int32_t errorCode = (int32_t) U_ERROR_COMMON_NOT_INITIALISED;
uCellPrivateInstance_t *pInstance;
uAtClientHandle_t atHandle;
int32_t bytesWritten = 0;
int32_t fileHandle = -1;
int32_t timeout = 10000;
int32_t offset = 0;
int32_t thisSize = 0;
int32_t chunkLength = 254;
size_t totalBytesWritten = 0;
if (gUCellPrivateMutex != NULL) {
U_PORT_MUTEX_LOCK(gUCellPrivateMutex);
pInstance = pUCellPrivateGetInstance(cellHandle);
errorCode = (int32_t) U_ERROR_COMMON_INVALID_PARAMETER;
// Check parameters
if ((pInstance != NULL) && (pData != NULL) && (pFileName != NULL) &&
(strlen(pFileName) <= pInstance->pModule->cellFileNameMaxLength)) {
errorCode = (int32_t) U_ERROR_COMMON_DEVICE_ERROR;
atHandle = pInstance->atHandle;
if (pInstance->pModule->moduleType == U_CELL_MODULE_TYPE_LEXI_R10) {
fileHandle = openFileLexiR10(pInstance, pFileName);
if (fileHandle > 0 ) {
// If the file already exists then we need to append data at the end.
// So check its length in bytes and seek to that position.
// Get the file size
uAtClientLock(atHandle);
uAtClientCommandStart(atHandle, "AT+ULSTFILE=2,");
uAtClientWriteString(atHandle, pFileName, true);
uAtClientCommandStop(atHandle);
uAtClientResponseStart(atHandle, "+ULSTFILE: ");
offset = uAtClientReadInt(atHandle);
uAtClientResponseStop(atHandle);
// Jump to the end of the file
uAtClientCommandStart(atHandle, "AT+FSEEK=");
uAtClientWriteInt(atHandle, fileHandle);
uAtClientWriteInt(atHandle, offset);
uAtClientCommandStopReadResponse(atHandle);
uAtClientUnlock(atHandle);
// Data is encoded as hex, so two characters per byte
dataSize = dataSize * 2;
while ((dataSize > 0) && (thisSize >= 0) &&
(bytesWritten >= 0)) {
thisSize = dataSize;
if (thisSize > (int32_t) chunkLength) {
thisSize = (int32_t) chunkLength;
}
if (thisSize > 0) {
uAtClientLock(atHandle);
uAtClientCommandStart(atHandle, "AT+FWRITEHEX=");
uAtClientWriteInt(atHandle, fileHandle);
uAtClientWriteInt(atHandle, thisSize);
uAtClientCommandStop(atHandle);
// Wait for "CONNECT" to come.
uAtClientResponseStart(atHandle, "CONNECT");
// Deliberately no uAtClientResponseStop() here.
uAtClientCommandStart(atHandle, "");
uAtClientWriteHexData(atHandle, (const uint8_t *) pData,
(uint8_t)(thisSize / 2)); // length in bytes
uAtClientCommandStop(atHandle);
uAtClientResponseStart(atHandle, "+FWRITE: ");
bytesWritten = uAtClientReadInt(atHandle);
// Skip the total file size
uAtClientSkipParameters(atHandle, 1);
uAtClientResponseStop(atHandle);
if (bytesWritten > 0) {
pData += bytesWritten;
dataSize -= bytesWritten * 2; // dataSize is in hex characters
totalBytesWritten += bytesWritten;
}
errorCode = uAtClientUnlock(atHandle);
}
}
if (errorCode == 0) {
// Return the total bytes written
errorCode = (int32_t) totalBytesWritten;
}
uAtClientLock(atHandle);
uAtClientCommandStart(atHandle, "AT+FCLOSE=");
uAtClientWriteInt(atHandle, fileHandle);
uAtClientCommandStopReadResponse(atHandle);
uAtClientUnlock(atHandle);
} else {
// Opening the file failed
errorCode = fileHandle;
}
} else {
// Do the UDWNFILE thang with the AT interface
uAtClientLock(atHandle);
uAtClientCommandStart(atHandle, "AT+UDWNFILE=");
// Write file name
uAtClientWriteString(atHandle, pFileName, true);
// Write size of data to be written into the file
uAtClientWriteInt(atHandle, (int32_t) dataSize);
if (pInstance->pFileSystemTag != NULL) {
// Write tag
uAtClientWriteString(atHandle, pInstance->pFileSystemTag, true);
}
uAtClientCommandStop(atHandle);
// Wait for the prompt
if (uAtClientWaitCharacter(atHandle, '>') == 0) {
// Allow plenty of time for this to complete
uAtClientTimeoutSet(atHandle, timeout);
uPortTaskBlock(50);
bytesWritten = uAtClientWriteBytes(atHandle, (const char *) pData,
dataSize, true);
// Restore at client timeout to default
uAtClientTimeoutSet(atHandle, U_AT_CLIENT_DEFAULT_TIMEOUT_MS);
// Grab the response
uAtClientCommandStopReadResponse(atHandle);
if (uAtClientUnlock(atHandle) == 0) {
errorCode = (int32_t) bytesWritten;
}
} else {
// Best to tidy whatever might have arrived instead
// of the prompt before exiting
uAtClientResponseStop(atHandle);
errorCode = uAtClientUnlock(atHandle);
}
}
}
U_PORT_MUTEX_UNLOCK(gUCellPrivateMutex);
}
return errorCode;
}
// Read data from file.
int32_t uCellFileRead(uDeviceHandle_t cellHandle,
const char *pFileName,
char *pData,
size_t dataSize)
{
int32_t errorCode = (int32_t) U_ERROR_COMMON_NOT_INITIALISED;
uCellPrivateInstance_t *pInstance;
uAtClientHandle_t atHandle;
int32_t readSize = 0;
int32_t indicatedReadSize = 0;
char buffer[20];
int32_t fileHandle = -1;
if (gUCellPrivateMutex != NULL) {
U_PORT_MUTEX_LOCK(gUCellPrivateMutex);
pInstance = pUCellPrivateGetInstance(cellHandle);
errorCode = (int32_t) U_ERROR_COMMON_INVALID_PARAMETER;
// Check parameters
if ((pInstance != NULL) && (pData != NULL) && (pFileName != NULL) &&
(strlen(pFileName) <= pInstance->pModule->cellFileNameMaxLength)) {
errorCode = (int32_t) U_ERROR_COMMON_DEVICE_ERROR;
atHandle = pInstance->atHandle;
if (pInstance->pModule->moduleType == U_CELL_MODULE_TYPE_LEXI_R10) {
// Get the file size
uAtClientLock(atHandle);
uAtClientCommandStart(atHandle, "AT+ULSTFILE=2,");
uAtClientWriteString(atHandle, pFileName, true);
uAtClientCommandStop(atHandle);
// Wait for the file size to be received in response.
uAtClientResponseStart(atHandle, "+ULSTFILE: ");
indicatedReadSize = uAtClientReadInt(atHandle);
uAtClientResponseStop(atHandle);
if (uAtClientUnlock(atHandle) == 0) {
if (indicatedReadSize > (int32_t)dataSize) {
// If the requested data length is less than
// the file size. Read the requested data bytes.
indicatedReadSize = dataSize;
}
// Open the file
fileHandle = openFileLexiR10(pInstance, pFileName);
if (fileHandle > 0) {
// Read the file
uAtClientLock(atHandle);
// Use the file handle to read from the file
uAtClientCommandStart(atHandle, "AT+FREAD=");
uAtClientWriteInt(atHandle, fileHandle);
uAtClientWriteInt(atHandle, indicatedReadSize);
uAtClientCommandStop(atHandle);
// Wait for "CONNECT <size>" to come and skip it.
snprintf(buffer, sizeof(buffer), "CONNECT %d\r\n", (int) indicatedReadSize);
uAtClientResponseStart(atHandle, buffer);
// Don't stop for anything!
uAtClientIgnoreStopTag(atHandle);
readSize = uAtClientReadBytes(atHandle, pData,
(size_t) (unsigned) indicatedReadSize,
true);
// Make sure to wait for the stop tag before
// we finish
uAtClientRestoreStopTag(atHandle);
uAtClientResponseStop(atHandle);
if (uAtClientUnlock(atHandle) == 0) {
errorCode = readSize;
}
uAtClientLock(atHandle);
uAtClientCommandStart(atHandle, "AT+FCLOSE=");
uAtClientWriteInt(atHandle, fileHandle);
uAtClientCommandStopReadResponse(atHandle);
uAtClientUnlock(atHandle);
} else {
// Opening the file failed
errorCode = fileHandle;
}
}
} else {
// Do the URDFILE thang with the AT interface
uAtClientLock(atHandle);
uAtClientCommandStart(atHandle, "AT+URDFILE=");
// Write file name
uAtClientWriteString(atHandle, pFileName, true);
if (pInstance->pFileSystemTag != NULL) {
// Write tag
uAtClientWriteString(atHandle, pInstance->pFileSystemTag, true);
}
uAtClientCommandStop(atHandle);
// Grab the response
if (U_CELL_PRIVATE_MODULE_IS_R4(pInstance->pModule->moduleType)) {
// SARA-R4 only puts \n before the
// response, not \r\n as it should
uAtClientResponseStart(atHandle, "\n+URDFILE:");
} else {
uAtClientResponseStart(atHandle, "+URDFILE:");
}
// Skip the file name
uAtClientSkipParameters(atHandle, 1);
// Read the size
indicatedReadSize = uAtClientReadInt(atHandle);
readSize = indicatedReadSize;
if (readSize > (int32_t) dataSize) {
readSize = (int32_t) dataSize;
}
// Don't stop for anything!
uAtClientIgnoreStopTag(atHandle);
// Get the leading quote mark out of the way
uAtClientReadBytes(atHandle, NULL, 1, true);
// Now read out all the actual data,
// first the bit we want
readSize = uAtClientReadBytes(atHandle, pData,
// Cast in two stages to keep Lint happy
(size_t) (unsigned) readSize,
true);
if (indicatedReadSize > readSize) {
//...and then the rest poured away to NULL
uAtClientReadBytes(atHandle, NULL,
// Cast in two stages to keep Lint happy
(size_t) (unsigned) (indicatedReadSize - readSize),
true);
}
// Make sure to wait for the stop tag before
// we finish
uAtClientRestoreStopTag(atHandle);
uAtClientResponseStop(atHandle);
if (uAtClientUnlock(atHandle) == 0) {
errorCode = readSize;
}
}
}
U_PORT_MUTEX_UNLOCK(gUCellPrivateMutex);
}
return errorCode;
}
// Read block of data from file.
int32_t uCellFileBlockRead(uDeviceHandle_t cellHandle,
const char *pFileName,
char *pData,
size_t offset,
size_t dataSize)
{
int32_t errorCode = (int32_t) U_ERROR_COMMON_NOT_INITIALISED;
uCellPrivateInstance_t *pInstance;
uAtClientHandle_t atHandle;
int32_t readSize = 0;
int32_t indicatedReadSize = 0;
int32_t fileHandle = 0;
char buffer[20];
if (gUCellPrivateMutex != NULL) {
U_PORT_MUTEX_LOCK(gUCellPrivateMutex);
pInstance = pUCellPrivateGetInstance(cellHandle);
errorCode = (int32_t) U_ERROR_COMMON_INVALID_PARAMETER;
// Check parameters
if ((pInstance != NULL) && (pData != NULL) && (pFileName != NULL) &&
(strlen(pFileName) <= pInstance->pModule->cellFileNameMaxLength)) {
errorCode = (int32_t) U_ERROR_COMMON_NOT_SUPPORTED;
// Use of tags is not supported by any of the modules
// we support for block reads
if (pInstance->pFileSystemTag == NULL) {
errorCode = (int32_t) U_ERROR_COMMON_DEVICE_ERROR;
atHandle = pInstance->atHandle;
if (pInstance->pModule->moduleType == U_CELL_MODULE_TYPE_LEXI_R10) {
// Get the file size
uAtClientLock(atHandle);
uAtClientCommandStart(atHandle, "AT+ULSTFILE=2,");
uAtClientWriteString(atHandle, pFileName, true);
uAtClientCommandStop(atHandle);
// Wait for the file size to be received in response.
uAtClientResponseStart(atHandle, "+ULSTFILE: ");
indicatedReadSize = uAtClientReadInt(atHandle);
uAtClientResponseStop(atHandle);
uAtClientUnlock(atHandle);
if (indicatedReadSize >= (int32_t)(dataSize + offset)) {
// Within the file range, we are all fine.
indicatedReadSize = dataSize;
} else {
// The requested data size is large than the
// file size.
if (indicatedReadSize >= (int32_t) offset) {
indicatedReadSize -= offset;
} else {
// error condition.
uPortLog("U_CELL_FILE: incompatible file read request sizes.");
uPortLog("Offset (%d) is larger than file size (%d).\n", offset, indicatedReadSize);
}
}
// Open the file
fileHandle = openFileLexiR10(pInstance, pFileName);
if (fileHandle > 0) {
uAtClientLock(atHandle);
uAtClientCommandStart(atHandle, "AT+FSEEK=");
uAtClientWriteInt(atHandle, fileHandle);
uAtClientWriteInt(atHandle, offset);
uAtClientCommandStopReadResponse(atHandle);
uAtClientUnlock(atHandle);
// Read the file
uAtClientLock(atHandle);
// Use the file handle to read from the file
uAtClientCommandStart(atHandle, "AT+FREAD=");
uAtClientWriteInt(atHandle, fileHandle);
uAtClientWriteInt(atHandle, indicatedReadSize);
uAtClientCommandStop(atHandle);
// Wait for "CONNECT <size>" to come and skip it.
snprintf(buffer, sizeof(buffer), "CONNECT %d\r\n", (int) indicatedReadSize);
uAtClientResponseStart(atHandle, buffer);
// Don't stop for anything!
uAtClientIgnoreStopTag(atHandle);
readSize = uAtClientReadBytes(atHandle, pData,
(size_t) (unsigned) indicatedReadSize,
true);
// Make sure to wait for the stop tag before
// we finish
uAtClientRestoreStopTag(atHandle);
uAtClientResponseStop(atHandle);
if (uAtClientUnlock(atHandle) == 0) {
errorCode = readSize;
}
uAtClientLock(atHandle);
uAtClientCommandStart(atHandle, "AT+FCLOSE=");
uAtClientWriteInt(atHandle, (int32_t) fileHandle);
uAtClientCommandStopReadResponse(atHandle);
uAtClientUnlock(atHandle);
} else {
// Opening the file failed
errorCode = fileHandle;
}
} else {
// Do the URDBLOCK thang with the AT interface
uAtClientLock(atHandle);
uAtClientCommandStart(atHandle, "AT+URDBLOCK=");
// Write file name
uAtClientWriteString(atHandle, pFileName, true);
// Write offset in bytes from the beginning of the file
uAtClientWriteInt(atHandle, (int32_t) offset);
// Write size of data to be read from file
uAtClientWriteInt(atHandle, (int32_t) dataSize);
uAtClientCommandStop(atHandle);
// Grab the response
if (U_CELL_PRIVATE_MODULE_IS_R4(pInstance->pModule->moduleType)) {
// SARA-R4 only puts \n before the
// response, not \r\n as it should
uAtClientResponseStart(atHandle, "\n+URDBLOCK:");
} else {
uAtClientResponseStart(atHandle, "+URDBLOCK:");
}
// Skip the file name
uAtClientSkipParameters(atHandle, 1);
// Read the size
indicatedReadSize = uAtClientReadInt(atHandle);
readSize = indicatedReadSize;
if (readSize > (int32_t) dataSize) {
readSize = (int32_t) dataSize;
}
// Don't stop for anything!
uAtClientIgnoreStopTag(atHandle);
// Get the leading quote mark out of the way
uAtClientReadBytes(atHandle, NULL, 1, true);
// Now read out all the actual data,
// first the bit we want
readSize = uAtClientReadBytes(atHandle, pData,
// Cast in two stages to keep Lint happy
(size_t) (unsigned) readSize,
true);
if (indicatedReadSize > readSize) {
//...and then the rest poured away to NULL
uAtClientReadBytes(atHandle, NULL,
// Cast in two stages to keep Lint happy
(size_t) (unsigned) (indicatedReadSize - readSize),
true);
}
// Make sure to wait for the stop tag before
// we finish
uAtClientRestoreStopTag(atHandle);
uAtClientResponseStop(atHandle);
if (uAtClientUnlock(atHandle) == 0) {
errorCode = readSize;
}
}
}
}
U_PORT_MUTEX_UNLOCK(gUCellPrivateMutex);
}
return errorCode;
}
// Read file size.
int32_t uCellFileSize(uDeviceHandle_t cellHandle,
const char *pFileName)
{
int32_t errorCode = (int32_t) U_ERROR_COMMON_NOT_INITIALISED;
uCellPrivateInstance_t *pInstance;
uAtClientHandle_t atHandle;
int32_t size = 0;
if (gUCellPrivateMutex != NULL) {
U_PORT_MUTEX_LOCK(gUCellPrivateMutex);
pInstance = pUCellPrivateGetInstance(cellHandle);
errorCode = (int32_t) U_ERROR_COMMON_INVALID_PARAMETER;
// Check parameters
if ((pInstance != NULL) && (pFileName != NULL) &&
(strlen(pFileName) <= U_CELL_FILE_NAME_MAX_LENGTH)) {
errorCode = (int32_t) U_ERROR_COMMON_DEVICE_ERROR;
atHandle = pInstance->atHandle;
// Do the ULSTFILE thang with the AT interface
uAtClientLock(atHandle);
uAtClientCommandStart(atHandle, "AT+ULSTFILE=");
// Write get file size op_code
uAtClientWriteInt(atHandle, 2);
// Write file name
uAtClientWriteString(atHandle, pFileName, true);
if (pInstance->pFileSystemTag != NULL) {
// Write tag
uAtClientWriteString(atHandle, pInstance->pFileSystemTag, true);
}
uAtClientCommandStop(atHandle);
// Grab the response
uAtClientResponseStart(atHandle, "+ULSTFILE:");
// Read file size
size = uAtClientReadInt(atHandle);
uAtClientResponseStop(atHandle);
if (uAtClientUnlock(atHandle) == 0) {
errorCode = size;
}
}
U_PORT_MUTEX_UNLOCK(gUCellPrivateMutex);
}
return errorCode;
}
// Delete file on file system.
int32_t uCellFileDelete(uDeviceHandle_t cellHandle,
const char *pFileName)
{
int32_t errorCode = (int32_t) U_ERROR_COMMON_NOT_INITIALISED;
uCellPrivateInstance_t *pInstance;
if (gUCellPrivateMutex != NULL) {
U_PORT_MUTEX_LOCK(gUCellPrivateMutex);
pInstance = pUCellPrivateGetInstance(cellHandle);
if (pInstance != NULL) {
errorCode = uCellPrivateFileDelete(pInstance, pFileName);
}
U_PORT_MUTEX_UNLOCK(gUCellPrivateMutex);
}
return errorCode;
}
// Get the name of the first file stored on file system.
int32_t uCellFileListFirst(uDeviceHandle_t cellHandle,
char *pFileName)
{
return uCellFileListFirst_r(cellHandle, pFileName, (void **) &gpFileList);
}
// Return subsequent file name in the list.
int32_t uCellFileListNext(uDeviceHandle_t cellHandle,
char *pFileName)
{
(void) cellHandle;
return uCellFileListNext_r(pFileName, (void **) &gpFileList);
}
// Free memory from list.
void uCellFileListLast(uDeviceHandle_t cellHandle)
{
(void) cellHandle;
uCellFileListLast_r((void **) &gpFileList);
}
// Get the name of the first file stored on file system, re-entrant version.
int32_t uCellFileListFirst_r(uDeviceHandle_t cellHandle,
char *pFileName, void **ppRentrant)
{
int32_t errorCode = (int32_t) U_ERROR_COMMON_NOT_INITIALISED;
uCellPrivateInstance_t *pInstance;
if (gUCellPrivateMutex != NULL) {
U_PORT_MUTEX_LOCK(gUCellPrivateMutex);
errorCode = (int32_t) U_ERROR_COMMON_INVALID_PARAMETER;
pInstance = pUCellPrivateGetInstance(cellHandle);
if ((pInstance != NULL) && (ppRentrant != NULL)) {
*ppRentrant = NULL;
errorCode = uCellPrivateFileListFirst(pInstance,
(uCellPrivateFileListContainer_t **) ppRentrant,
pFileName);
}
U_PORT_MUTEX_UNLOCK(gUCellPrivateMutex);
}
return errorCode;
}
// Return subsequent file name in the list, re-entrant version.
int32_t uCellFileListNext_r(char *pFileName, void **ppRentrant)
{
int32_t errorCode = (int32_t) U_ERROR_COMMON_NOT_INITIALISED;
if (gUCellPrivateMutex != NULL) {
// Though this doesn't use the instance pointer we can
// use the cellular API mutex to protect the linked list
U_PORT_MUTEX_LOCK(gUCellPrivateMutex);
errorCode = (int32_t) U_ERROR_COMMON_INVALID_PARAMETER;
if (ppRentrant != NULL) {
errorCode = uCellPrivateFileListNext((uCellPrivateFileListContainer_t **) ppRentrant,
pFileName);
}
U_PORT_MUTEX_UNLOCK(gUCellPrivateMutex);
}
return errorCode;
}
// Free memory from list, re-entrant version.
void uCellFileListLast_r(void **ppRentrant)
{
if (gUCellPrivateMutex != NULL) {
// Though this doesn't use the instance pointer we can
// use the cellular API mutex to protect the linked list
U_PORT_MUTEX_LOCK(gUCellPrivateMutex);
if (ppRentrant != NULL) {
uCellPrivateFileListLast((uCellPrivateFileListContainer_t **) ppRentrant);
}
U_PORT_MUTEX_UNLOCK(gUCellPrivateMutex);
}
}
// End of file