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#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#ifdef WIN32
#include <windows.h>
#else
#include <sys/socket.h>
#endif
#include <stdio.h> // DEBUG, pour printf
#include "ivyfifo.h"
#include "param.h"
#define MIN(a, b) ((a) > (b) ? (b) : (a))
static void IvyFifoRealloc(IvyFifoBuffer *f, unsigned int neededSize);
static unsigned int IvyFifoGenericRead(IvyFifoBuffer *f, const unsigned int buf_size,
void (*func)(void*, void*, int), void* dest);
static void IvyFifoDrain(IvyFifoBuffer *f, int size);
/* static unsigned char IvyFifoPeek(IvyFifoBuffer *f, int offs); */
int IvyFifoInit(IvyFifoBuffer *f)
{
f->wptr = f->rptr =
f->buffer = malloc(IVY_FIFO_ALLOC_SIZE);
f->end = f->buffer + IVY_FIFO_ALLOC_SIZE;
f->full = 0;
if (!f->buffer)
return -1;
return 0;
}
void IvyFifoFree (IvyFifoBuffer *f)
{
free(f->buffer);
f->wptr = f->rptr = f->buffer = NULL;
}
IvyFifoBuffer* IvyFifoNew (void)
{
IvyFifoBuffer* ifb = malloc (sizeof (IvyFifoBuffer));
IvyFifoInit (ifb);
return (ifb);
}
void IvyFifoDelete (IvyFifoBuffer *f)
{
IvyFifoFree (f);
free (f);
}
unsigned int IvyFifoSize (const IvyFifoBuffer *f)
{
return (f->end - f->buffer);
}
unsigned int IvyFifoLength (const IvyFifoBuffer *f)
{
long size = f->wptr - f->rptr;
if (size < 0)
size += f->end - f->buffer;
return size;
}
unsigned int IvyFifoAvail(const IvyFifoBuffer *f)
{
return (IvyFifoSize (f)- IvyFifoLength (f));
}
unsigned int IvyFifoRead (IvyFifoBuffer *f, char *buf, unsigned int buf_size)
{
return IvyFifoGenericRead(f, buf_size, NULL, buf);
}
void IvyFifoRealloc (IvyFifoBuffer *f, unsigned int new_size)
{
unsigned int old_size= IvyFifoSize (f);
unsigned int alignedNewSize = ((new_size/IVY_FIFO_ALLOC_SIZE) +1) * IVY_FIFO_ALLOC_SIZE;
if (alignedNewSize > IVY_FIFO_MAX_ALLOC_SIZE) {
f->full = 1;
} else if (old_size < alignedNewSize) {
int len= IvyFifoLength(f);
IvyFifoBuffer f2;
f2.wptr = f2.rptr =
f2.buffer = malloc(alignedNewSize);
f2.end = f2.buffer + alignedNewSize;
f2.full = 0;
IvyFifoRead(f, f2.buffer, len);
f2.wptr += len;
free(f->buffer);
*f= f2;
}
}
void IvyFifoWrite (IvyFifoBuffer *f, const char *buf, unsigned int size)
{
if (size >= IvyFifoAvail (f)) {
IvyFifoRealloc(f, size + IvyFifoLength (f));
}
if (f->full) {
return ;
}
do {
unsigned int len = MIN((unsigned int)(f->end - f->wptr), size);
memcpy(f->wptr, buf, len);
f->wptr += len;
if (f->wptr >= f->end)
f->wptr = f->buffer;
buf += len;
size -= len;
} while (size > 0);
}
unsigned int IvyFifoGenericRead (IvyFifoBuffer *f, const unsigned int buf_size, void (*func)(void*, void*, int), void* dest)
{
unsigned int bytesToRead, retV;
retV = bytesToRead = MIN(buf_size, IvyFifoLength(f));
do {
unsigned int len = MIN((unsigned int)(f->end - f->rptr), bytesToRead);
if (func) {
func (dest, f->rptr, len);
} else {
memcpy(dest, f->rptr, len);
dest = (unsigned char*)dest + len;
}
IvyFifoDrain(f, len);
bytesToRead -= len;
} while (bytesToRead > 0);
return (retV);
}
unsigned int IvyFifoSendSocket (IvyFifoBuffer *f, const int fd)
{
unsigned int maxLen, realLen;
do {
maxLen = MIN ((unsigned int)(f->end - f->rptr), IvyFifoLength(f));
#ifdef WIN32
realLen = send (fd, f->rptr, maxLen, 0);
#else
realLen = send (fd, f->rptr, maxLen, MSG_DONTWAIT);
#endif
IvyFifoDrain(f, realLen);
// printf ("DBG> maxLen=%d realLen=%d IvyFifoLength=%d\n",
// maxLen, realLen, IvyFifoLength(f));
} while (IvyFifoLength(f) && (maxLen == realLen));
return (IvyFifoLength(f));
}
void IvyFifoDrain (IvyFifoBuffer *f, int size)
{
f->rptr += size;
if (f->rptr >= f->end)
f->rptr -= f->end - f->buffer;
if (size > 0) {
f->full = 0;
}
}
int IvyFifoIsFull (const IvyFifoBuffer *f)
{
return (f->full);
}
/* unsigned char IvyFifoPeek(IvyFifoBuffer *f, int offs) */
/* { */
/* unsigned char *ptr = f->rptr + offs; */
/* if (ptr >= f->end) */
/* ptr -= f->end - f->buffer; */
/* return *ptr; */
/* } */
//#define TEST_UNITAIRE 1
#ifdef TEST_UNITAIRE
int main (int argc, char**argv)
{
if (1 == 2) {
IvyFifoBuffer ifb;
unsigned char toRead [4096];
unsigned char toWrite [8192];
int (i);
for (i=0; i< sizeof (toRead); i++) {
toRead[i] = (char) (i%10)+48;
}
IvyFifoInit (&ifb);
IvyFifoWrite(&ifb, toRead, 4096);
printf ("DBG> fifo size=%u, length=%u\n", IvyFifoSize(&ifb), IvyFifoLength(&ifb));
IvyFifoWrite(&ifb, toRead, 1024);
printf ("DBG> fifo size=%u, length=%u\n", IvyFifoSize(&ifb), IvyFifoLength(&ifb));
unsigned int nbRead=IvyFifoRead(&ifb, toWrite, sizeof (toWrite));
// int nbRead=IvyFifoRead(&ifb, toWrite, 1024);
printf ("DBG> ndRead=%u, fifo size=%u, length=%u\n", nbRead, IvyFifoSize(&ifb), IvyFifoLength(&ifb));
}
{
IvyFifoBuffer ifb;
unsigned char toRead [8];
unsigned char toWrite [16];
unsigned int nbRead;
int (i);
for (i=0; i< sizeof (toRead); i++) {
toRead[i] = (char) (i%10)+48;
}
IvyFifoInit (&ifb);
IvyFifoWrite(&ifb, toRead, 8);
printf ("DBG> fifo size=%u, length=%u\n", IvyFifoSize(&ifb), IvyFifoLength(&ifb));
nbRead=IvyFifoRead(&ifb, toWrite, 4);
toWrite[nbRead] = 0;
printf ("DBG> ndRead=%u, fifo size=%u, length=%u, buffer=%s\n", nbRead, IvyFifoSize(&ifb),
IvyFifoLength(&ifb), toWrite);
IvyFifoWrite(&ifb, toRead, 8);
printf ("DBG> fifo size=%u, length=%u\n", IvyFifoSize(&ifb), IvyFifoLength(&ifb));
nbRead=IvyFifoRead(&ifb, toWrite, 8);
toWrite[nbRead] = 0;
printf ("DBG> ndRead=%u, fifo size=%u, length=%u, buffer=%s\n", nbRead, IvyFifoSize(&ifb),
IvyFifoLength(&ifb), toWrite);
nbRead=IvyFifoRead(&ifb, toWrite, 8);
toWrite[nbRead] = 0;
printf ("DBG> ndRead=%u, fifo size=%u, length=%u, buffer=%s\n", nbRead, IvyFifoSize(&ifb),
IvyFifoLength(&ifb), toWrite);
nbRead=IvyFifoRead(&ifb, toWrite, 8);
toWrite[nbRead] = 0;
printf ("DBG> ndRead=%u, fifo size=%u, length=%u, buffer=%s\n", nbRead, IvyFifoSize(&ifb),
IvyFifoLength(&ifb), toWrite);
nbRead=IvyFifoRead(&ifb, toWrite, 4);
toWrite[nbRead] = 0;
printf ("DBG> ndRead=%u, fifo size=%u, length=%u, buffer=%s\n", nbRead, IvyFifoSize(&ifb),
IvyFifoLength(&ifb), toWrite);
IvyFifoWrite(&ifb, toRead, 8);
printf ("DBG> fifo size=%u, length=%u\n", IvyFifoSize(&ifb), IvyFifoLength(&ifb));
nbRead=IvyFifoRead(&ifb, toWrite, 8);
toWrite[nbRead] = 0;
printf ("DBG> ndRead=%u, fifo size=%u, length=%u, buffer=%s\n", nbRead, IvyFifoSize(&ifb),
IvyFifoLength(&ifb), toWrite);
nbRead=IvyFifoRead(&ifb, toWrite, 8);
toWrite[nbRead] = 0;
printf ("DBG> ndRead=%u, fifo size=%u, length=%u, buffer=%s\n", nbRead, IvyFifoSize(&ifb),
IvyFifoLength(&ifb), toWrite);
nbRead=IvyFifoRead(&ifb, toWrite, 8);
toWrite[nbRead] = 0;
printf ("DBG> ndRead=%u, fifo size=%u, length=%u, buffer=%s\n", nbRead, IvyFifoSize(&ifb),
IvyFifoLength(&ifb), toWrite);
}
return (0);
}
#endif // TEST_UNITAIRE
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