vdr-plugin-streamdev/tools/source.c

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#include "tools/source.h"
#include "tools/select.h"
#include "common.h"
#include <vdr/tools.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
cTBSource::cTBSource(void) {
m_BytesRead = 0;
m_BytesWritten = 0;
m_Filed = -1;
}
bool cTBSource::Open(int Filed, bool IsUnixFd) {
if (IsOpen())
Close();
m_Filed = Filed;
if (IsUnixFd && ::fcntl(m_Filed, F_SETFL, O_NONBLOCK) == -1)
return false;
return true;
}
cTBSource::~cTBSource() {
}
bool cTBSource::Close(void) {
if (!IsOpen()) {
errno = EBADF;
return false;
}
m_Filed = -1;
return true;
}
ssize_t cTBSource::Read(void *Buffer, size_t Length) {
ssize_t res;
while ((res = SysRead(Buffer, Length)) < 0 && errno == EINTR)
errno = 0;
if (res > 0) m_BytesRead += res;
return res;
}
ssize_t cTBSource::Write(const void *Buffer, size_t Length) {
ssize_t res;
while ((res = SysWrite(Buffer, Length)) < 0 && errno == EINTR)
errno = 0;
if (res > 0) m_BytesWritten += res;
return res;
}
bool cTBSource::TimedWrite(const void *Buffer, size_t Length, uint TimeoutMs) {
cTBSelect sel;
int ms, offs;
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cTimeMs starttime;
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ms = TimeoutMs;
offs = 0;
while (Length > 0) {
int b;
sel.Clear();
sel.Add(m_Filed, true);
if (sel.Select(ms) == -1)
return false;
if (sel.CanWrite(m_Filed)) {
if ((b = Write((char*)Buffer + offs, Length)) == -1)
return false;
offs += b;
Length -= b;
}
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ms = TimeoutMs - starttime.Elapsed();
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if (ms <= 0) {
errno = ETIMEDOUT;
return false;
}
}
return true;
}
ssize_t cTBSource::ReadUntil(void *Buffer, size_t Length, const char *Seq,
uint TimeoutMs) {
char *offs;
int seqlen, ms;
size_t olen;
cTBSelect sel;
seqlen = strlen(Seq);
if ((offs = (char*)memmem(m_LineBuffer, m_LineBuffer.Length(), Seq, seqlen))){
olen = offs - m_LineBuffer;
if (olen >= Length) {
errno = ENOBUFS;
return -1;
}
memcpy(Buffer, m_LineBuffer, olen);
m_LineBuffer = m_LineBuffer.Mid(olen + seqlen);
Dprintf("ReadUntil: Served from Linebuffer: %d, |%.*s|\n", olen, olen - 1,
(char*)Buffer);
return olen;
}
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cTimeMs starttime;
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ms = TimeoutMs;
while (m_LineBuffer.Length() < BUFSIZ) {
int b;
sel.Clear();
sel.Add(m_Filed, false);
if (sel.Select(ms) == -1)
return -1;
if (sel.CanRead(m_Filed)) {
offs = m_LineBuffer.Buffer(BUFSIZ);
if ((b = Read(offs + m_LineBuffer.Length(), BUFSIZ
- m_LineBuffer.Length())) == -1)
return -1;
m_LineBuffer.Release(m_LineBuffer.Length() + b);
if ((offs = (char*)memmem(m_LineBuffer, m_LineBuffer.Length(), Seq,
seqlen))) {
olen = offs - m_LineBuffer;
if (olen >= Length) {
errno = ENOBUFS;
return -1;
}
memcpy(Buffer, m_LineBuffer, olen);
m_LineBuffer = m_LineBuffer.Mid(olen + seqlen, m_LineBuffer.Length()
- olen - seqlen);
Dprintf("ReadUntil: Served after Read: %d, |%.*s|\n", olen, olen-1,
(char*)Buffer);
return olen;
}
}
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ms = TimeoutMs - starttime.Elapsed();
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if (ms <= 0) {
errno = ETIMEDOUT;
return -1;
}
}
errno = ENOBUFS;
return -1;
/*
cTBSelect sel;
time_t st, et;
int ms, seqlen, offs;
seqlen = strlen(Seq);
st = time_ms();
ms = TimeoutMs;
offs = 0;
while (Length > 0) {
int b;
sel.Clear();
sel.Add(m_Filed, false);
if (sel.Select(ms) == -1)
return -1;
if (sel.CanRead(m_Filed)) {
if ((b = Read((char*)Buffer + offs, Length)) == -1)
return -1;
offs += b;
Length -= b;
if (memmem(Buffer, offs, Seq, seqlen) != NULL)
return offs;
}
et = time_ms();
ms -= et - st;
if (ms <= 0) {
errno = ETIMEDOUT;
return -1;
}
}
errno = ENOBUFS;
return -1;
*/
}