mirror of
https://github.com/JorjBauer/aiie.git
synced 2024-08-28 17:29:31 +00:00
190 lines
4.1 KiB
C++
190 lines
4.1 KiB
C++
#include <string.h> // strcpy
|
|
#include <sys/types.h>
|
|
#include <sys/uio.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <stdio.h>
|
|
|
|
#include "opencv-filemanager.h"
|
|
|
|
|
|
OpenCVFileManager::OpenCVFileManager()
|
|
{
|
|
numCached = 0;
|
|
}
|
|
|
|
OpenCVFileManager::~OpenCVFileManager()
|
|
{
|
|
}
|
|
|
|
int8_t OpenCVFileManager::openFile(const char *name)
|
|
{
|
|
// See if there's a hole to re-use...
|
|
for (int i=0; i<numCached; i++) {
|
|
if (cachedNames[i][0] == '\0') {
|
|
strncpy(cachedNames[i], name, MAXPATH-1);
|
|
cachedNames[i][MAXPATH-1] = '\0'; // safety: ensure string terminator
|
|
fileSeekPositions[i] = 0;
|
|
return i;
|
|
}
|
|
}
|
|
|
|
// check for too many open files
|
|
if (numCached >= MAXFILES)
|
|
return -1;
|
|
|
|
|
|
// No, so we'll add it to the end
|
|
strncpy(cachedNames[numCached], name, MAXPATH-1);
|
|
cachedNames[numCached][MAXPATH-1] = '\0'; // safety: ensure string terminator
|
|
fileSeekPositions[numCached] = 0;
|
|
|
|
numCached++;
|
|
return numCached-1;
|
|
}
|
|
|
|
void OpenCVFileManager::closeFile(int8_t fd)
|
|
{
|
|
// invalid fd provided?
|
|
if (fd < 0 || fd >= numCached)
|
|
return;
|
|
|
|
// clear the name
|
|
cachedNames[fd][0] = '\0';
|
|
}
|
|
|
|
const char *OpenCVFileManager::fileName(int8_t fd)
|
|
{
|
|
if (fd < 0 || fd >= numCached)
|
|
return NULL;
|
|
|
|
return cachedNames[fd];
|
|
}
|
|
|
|
int8_t OpenCVFileManager::readDir(const char *where, const char *suffix, char *outputFN, int8_t startIdx, uint16_t maxlen)
|
|
{
|
|
// not used in this version
|
|
return -1;
|
|
}
|
|
|
|
void OpenCVFileManager::seekBlock(int8_t fd, uint16_t block, bool isNib)
|
|
{
|
|
if (fd < 0 || fd >= numCached)
|
|
return;
|
|
|
|
if (isNib) {
|
|
fileSeekPositions[fd] = block * 416;
|
|
} else {
|
|
fileSeekPositions[fd] = block * 256;
|
|
}
|
|
}
|
|
|
|
|
|
bool OpenCVFileManager::readTrack(int8_t fd, uint8_t *toWhere, bool isNib)
|
|
{
|
|
if (fd < 0 || fd >= numCached)
|
|
return false;
|
|
|
|
if (cachedNames[fd][0] == 0)
|
|
return false;
|
|
|
|
// open, seek, read, close.
|
|
bool ret = false;
|
|
int ffd = open(cachedNames[fd], O_RDONLY);
|
|
if (ffd) {
|
|
lseek(ffd, fileSeekPositions[fd], SEEK_SET);
|
|
if (isNib) {
|
|
ret = (read(ffd, toWhere, 0x1A00) == 0x1A00);
|
|
} else {
|
|
ret = (read(ffd, toWhere, 256 * 16) == 256 * 16);
|
|
}
|
|
close(ffd);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
bool OpenCVFileManager::readBlock(int8_t fd, uint8_t *toWhere, bool isNib)
|
|
{
|
|
// open, seek, read, close.
|
|
if (fd < 0 || fd >= numCached)
|
|
return false;
|
|
|
|
if (cachedNames[fd][0] == 0)
|
|
return false;
|
|
|
|
// open, seek, read, close.
|
|
bool ret = false;
|
|
int ffd = open(cachedNames[fd], O_RDONLY);
|
|
if (ffd) {
|
|
lseek(ffd, fileSeekPositions[fd], SEEK_SET);
|
|
if (isNib) {
|
|
ret = (read(ffd, toWhere, 416) == 416);
|
|
} else {
|
|
ret = (read(ffd, toWhere, 256) == 256);
|
|
}
|
|
close(ffd);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
bool OpenCVFileManager::writeBlock(int8_t fd, uint8_t *fromWhere, bool isNib)
|
|
{
|
|
// open, seek, write, close.
|
|
if (fd < 0 || fd >= numCached)
|
|
return false;
|
|
|
|
if (cachedNames[fd][0] == 0)
|
|
return false;
|
|
|
|
// don't know how to do this without seeking through the nibblized
|
|
// track data, so just give up for now
|
|
if (isNib)
|
|
return false;
|
|
|
|
// open, seek, write, close.
|
|
int ffd = open(cachedNames[fd], O_WRONLY);
|
|
if (ffd) {
|
|
if (lseek(ffd, fileSeekPositions[fd], SEEK_SET) != fileSeekPositions[fd]) {
|
|
printf("ERROR: failed to seek to %lu\n", fileSeekPositions[fd]);
|
|
return false;
|
|
}
|
|
if (write(ffd, fromWhere, 256) != 256) {
|
|
printf("ERROR: failed to write 256 bytes\n");
|
|
return false;
|
|
}
|
|
close(ffd);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool OpenCVFileManager::writeTrack(int8_t fd, uint8_t *fromWhere, bool isNib)
|
|
{
|
|
// open, seek, write, close.
|
|
if (fd < 0 || fd >= numCached)
|
|
return false;
|
|
|
|
if (cachedNames[fd][0] == 0)
|
|
return false;
|
|
|
|
// open, seek, write, close.
|
|
int ffd = open(cachedNames[fd], O_WRONLY);
|
|
if (ffd) {
|
|
if (lseek(ffd, fileSeekPositions[fd], SEEK_SET) != fileSeekPositions[fd]) {
|
|
printf("ERROR: failed to seek to %lu\n", fileSeekPositions[fd]);
|
|
return false;
|
|
}
|
|
int16_t wrsize = 256 * 16;
|
|
if (isNib)
|
|
wrsize = 0x1A00;
|
|
|
|
if (write(ffd, fromWhere, wrsize) != wrsize) {
|
|
printf("ERROR: failed to write bytes\n");
|
|
return false;
|
|
}
|
|
close(ffd);
|
|
}
|
|
return true;
|
|
}
|