long OsFile_seek(OsFile_Handle handle, long offset, int origin) {
switch (origin) {
case SEEK_END: origin = PCSL_FILE_SEEK_END; break;
case SEEK_SET: origin = PCSL_FILE_SEEK_SET; break;
case SEEK_CUR: origin = PCSL_FILE_SEEK_CUR; break;
}
return pcsl_file_seek(handle->pcsl_handle, offset, origin);
}
/**
* The write function writes up to size bytes from buffer to the file
* with descriptor identifier.
* The return value is the number of bytes actually written.
* This is normally the same as size, but might be less (for example,
* if the persistent storage being written to fills up).
*/
int pcsl_file_write(void *handle, unsigned char* buffer, long length)
{
DWORD bytesWritten;
PCSLFile* pFH = (PCSLFile*)handle;
if (NULL == handle)
return -1;
if (PCSL_FILE_O_APPEND == (pFH->createFlags && PCSL_FILE_O_APPEND)) {
if (!pcsl_file_seek(handle, 0, PCSL_FILE_SEEK_END))
return -1;
}
if (!WriteFile(pFH->fileHandle, buffer, (DWORD)length, &bytesWritten, NULL))
return -1;
return bytesWritten;
}
/*
* Change the read/write position of an open file in storage.
* The position is a number of bytes from beginning of the file.
*
* If not successful *ppszError will set to point to an error string,
* on success it will be set to NULL.
*/
void
storagePosition(char** ppszError, int handle, long absolutePosition) {
long newPosition;
newPosition = pcsl_file_seek((void *)handle, absolutePosition,
PCSL_FILE_SEEK_SET);
REPORT_INFO2(LC_CORE, "storagePostion on fd %d res = %d\n",
handle, newPosition);
if (-1 == newPosition) {
*ppszError = getLastError("storagePosition()");
return;
}
*ppszError = NULL;
}
/*
* Change the read/write position of an open file in storage.
* The position is a number of bytes from current position.
*
* If not successful *ppszError will set to point to an error string,
* on success it will be set to NULL.
*
* @return new absolute read/write position
*/
long
storageRelativePosition(char** ppszError, int handle, long offset) {
long newPosition;
newPosition = pcsl_file_seek((void *)handle, offset, PCSL_FILE_SEEK_CUR);
REPORT_INFO2(LC_CORE, "storageRelativePostion on fd %d res = %d\n",
handle, newPosition);
if (-1 == newPosition) {
*ppszError = getLastError("storageRelativePosition()");
return -1;
}
*ppszError = NULL;
return newPosition;
}
/**
* Gets a resource for pointed resource identifier and locale.
*
* @param resource buffer for the resource
* @param res_len length of the resource buffer
* @param resource_id resource identifier
* @param locale_index index of the locale
* @return 0 in case successful operation and -1 if something is wrong
*/
JSR238_STATUSCODE jsr238_get_resource(jbyte* resource, jint res_len, jint resource_id, jint locale_index) {
void * handle;
ResourceTableEntryType entry;
unsigned char buf[4];
int res = JSR238_STATUSCODE_FAIL;
REPORT_CALL_TRACE(LC_LOWUI, "LF:STUB:jsr238_get_resource()\n");
if (jsr238_devresource_file_open(locale_index, &handle) >= 0)
{
pcsl_file_read(handle, (char*)&ResourceFileHeader, 4);
pcsl_file_read(handle, buf, 4);
jsr238_fillInt(&ResourceFileHeader.headerLength, buf);
if (jsr238_seekEntry(handle, resource_id, ResourceFileHeader.headerLength / 8, &entry)){
pcsl_file_seek(handle, entry.resourceOffset, 0);
pcsl_file_read(handle, resource, res_len);
res = JSR238_STATUSCODE_OK;
}
pcsl_file_close(handle);
}
return res;
}
