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#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include "Async.h"
#include "Input.h"
#include "Task.h"
#include "TaskMan.h"
#include "Printer.h"
#ifdef _WIN32
static const char * strerror_r(int errorno, char * buf, size_t bufsize) {
#ifdef _MSVC
strerror_s(buf, bufsize, errorno);
return buf;
#else
return strerror(errorno);
#endif
}
#endif
namespace {
struct cbResults_t {
Balau::Events::Custom evt;
int result, errorno;
};
class AsyncOpOpen : public Balau::AsyncOperation {
public:
AsyncOpOpen(const char * path, cbResults_t * results) : m_path(path), m_results(results) { }
virtual void run() {
int r = m_results->result = open(m_path, O_RDONLY);
m_results->errorno = r < 0 ? errno : 0;
}
virtual void done() {
m_results->evt.doSignal();
delete this;
}
private:
const char * m_path;
cbResults_t * m_results;
};
struct cbStatsResults_t {
Balau::Events::Custom evt;
int result, errorno;
struct stat statdata;
};
class AsyncOpStat : public Balau::AsyncOperation {
public:
AsyncOpStat(int fd, cbStatsResults_t * results) : m_fd(fd), m_results(results) { }
virtual void run() {
int r = m_results->result = fstat(m_fd, &m_results->statdata);
m_results->errorno = r < 0 ? errno : 0;
}
virtual void done() {
m_results->evt.doSignal();
delete this;
}
private:
int m_fd;
cbStatsResults_t * m_results;
};
};
Balau::Input::Input(const char * fname) {
m_name.set("Input(%s)", fname);
m_fname = fname;
}
void Balau::Input::open() throw (GeneralException) {
Printer::elog(E_INPUT, "Opening file %s", m_fname.to_charp());
cbResults_t cbResults;
createAsyncOp(new AsyncOpOpen(m_fname.to_charp(), &cbResults));
Task::operationYield(&cbResults.evt);
if (cbResults.result < 0) {
if (cbResults.errorno == ENOENT) {
throw ENoEnt(m_fname);
} else {
char str[4096];
throw GeneralException(String("Unable to open file ") + m_name + " for reading: " + strerror_r(cbResults.errorno, str, sizeof(str)) + " (err#" + cbResults.errorno + ")");
}
} else {
m_fd = cbResults.result;
}
cbStatsResults_t cbStatsResults;
createAsyncOp(new AsyncOpStat(m_fd, &cbStatsResults));
Task::operationYield(&cbStatsResults.evt);
if (cbStatsResults.result == 0) {
m_size = cbStatsResults.statdata.st_size;
m_mtime = cbStatsResults.statdata.st_mtime;
}
}
namespace {
class AsyncOpClose : public Balau::AsyncOperation {
public:
AsyncOpClose(int fd, cbResults_t * results) : m_fd(fd), m_results(results) { }
virtual void run() {
int r = m_results->result = close(m_fd);
m_results->errorno = r < 0 ? errno : 0;
}
virtual void done() {
m_results->evt.doSignal();
delete this;
}
private:
int m_fd;
cbResults_t * m_results;
};
};
void Balau::Input::close() throw (GeneralException) {
if (m_fd < 0)
return;
cbResults_t cbResults;
createAsyncOp(new AsyncOpClose(m_fd, &cbResults));
Task::operationYield(&cbResults.evt);
m_fd = -1;
if (cbResults.result < 0) {
char str[4096];
strerror_r(cbResults.errorno, str, sizeof(str));
throw GeneralException(String("Unable to close file ") + m_name + ": " + str);
}
}
namespace {
struct cbReadResults_t {
Balau::Events::Custom evt;
ssize_t result;
int errorno;
};
class AsyncOpRead : public Balau::AsyncOperation {
public:
AsyncOpRead(int fd, void * buf, size_t count, off_t offset, cbReadResults_t * results) : m_fd(fd), m_buf(buf), m_count(count), m_offset(offset), m_results(results) { }
virtual void run() {
ssize_t r = m_results->result = pread(m_fd, m_buf, m_count, m_offset);
m_results->errorno = r < 0 ? errno : 0;
}
virtual void done() {
m_results->evt.doSignal();
delete this;
}
private:
int m_fd;
void * m_buf;
size_t m_count;
off_t m_offset;
cbReadResults_t * m_results;
};
};
ssize_t Balau::Input::read(void * buf, size_t count) throw (GeneralException) {
cbReadResults_t cbResults;
createAsyncOp(new AsyncOpRead(m_fd, buf, count, getROffset(), &cbResults));
Task::operationYield(&cbResults.evt);
if (cbResults.result > 0) {
rseek(cbResults.result, SEEK_CUR);
} else {
char str[4096];
throw GeneralException(String("Unable to read file ") + m_name + ": " + strerror_r(cbResults.errorno, str, sizeof(str)) + " (err#" + cbResults.errorno + ")");
}
return cbResults.result;
}
bool Balau::Input::isClosed() {
return m_fd < 0;
}
const char * Balau::Input::getName() {
return m_name.to_charp();
}
off_t Balau::Input::getSize() {
return m_size;
}
time_t Balau::Input::getMTime() {
return m_mtime;
}
bool Balau::Input::canRead() {
return true;
}
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