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//========================================================================
//
// BonoboFile.cc
//
// Copyright 1999 Derek B. Noonburg assigned by Michael Meeks.
//
//========================================================================
#ifdef __GNUC__
#pragma implementation
#endif
#include <aconf.h>
#include "config.h"
#include "BonoboStream.h"
#include "gpdf-g-switch.h"
# include <bonobo.h>
#include "gpdf-g-switch.h"
#ifndef NO_DECRYPTION
#include "Decrypt.h"
#endif
typedef Bonobo_Stream BaseFile;
#if 0
# define DBG_MORE(x) x
#else
# define DBG_MORE(x)
#endif
static inline size_t
bfread (void *ptr, size_t size, size_t nmemb, BaseFile file)
{
CORBA_long len;
CORBA_Environment ev;
Bonobo_Stream_iobuf *buffer = NULL;
g_return_val_if_fail (ptr != NULL, 0);
DBG_MORE (g_message ("read %p %d %d to %p\n", file, size, nmemb, ptr));
CORBA_exception_init (&ev);
Bonobo_Stream_read (file, size*nmemb, &buffer, &ev);
if (ev._major != CORBA_NO_EXCEPTION) {
g_warning ("Failed bfread");
CORBA_exception_free (&ev);
return 0;
}
CORBA_exception_free (&ev);
memcpy (ptr, buffer->_buffer, buffer->_length);
len = buffer->_length;
DBG_MORE (g_message ("Read %d bytes %p %d\n",
len, buffer->_buffer, buffer->_length));
CORBA_free (buffer);
return len;
}
static inline int
bfseek (BaseFile file, long offset, int whence)
{
CORBA_Environment ev;
Bonobo_Stream_SeekType t;
CORBA_long ans;
DBG_MORE (g_message ("Seek %p %ld %d\n", file, offset, whence));
if (whence == SEEK_SET)
t = Bonobo_Stream_SeekSet;
else if (whence == SEEK_CUR)
t = Bonobo_Stream_SeekCur;
else if (whence == SEEK_END)
t = Bonobo_Stream_SeekEnd;
else {
g_warning ("Serious error in seek type");
t = Bonobo_Stream_SeekSet;
}
CORBA_exception_init (&ev);
ans = Bonobo_Stream_seek (file, offset, t, &ev);
CORBA_exception_free (&ev);
return ans;
}
static inline void
brewind (BaseFile file)
{
bfseek (file, 0, SEEK_SET);
}
static inline long
bftell (BaseFile file)
{
CORBA_Environment ev;
CORBA_long pos;
DBG_MORE (g_message ("tell %p\n", file));
CORBA_exception_init (&ev);
pos = Bonobo_Stream_seek (file, 0, Bonobo_Stream_SeekCur, &ev);
CORBA_exception_free (&ev);
DBG_MORE (g_message ("tell returns %d\n", pos));
return pos;
}
bonoboStream::bonoboStream(Bonobo_Stream fA, Guint startA, GBool limitedA,
Guint lengthA, Object *dictA):
BaseStream(dictA) {
f = fA;
start = startA;
limited = limitedA;
length = lengthA;
bufPtr = bufEnd = buf;
bufPos = start;
savePos = 0;
saved = gFalse;
}
bonoboStream::~bonoboStream() {
close();
}
Stream *bonoboStream::makeSubStream(Guint startA, GBool limitedA,
Guint lengthA, Object *dictA) {
return new bonoboStream(f, startA, limitedA, lengthA, dictA);
}
void bonoboStream::reset() {
savePos = (Guint)bftell(f);
saved = gTrue;
bfseek(f, start, SEEK_SET);
bufPtr = bufEnd = buf;
bufPos = start;
#ifndef NO_DECRYPTION
if (decrypt)
decrypt->reset();
#endif
}
void bonoboStream::close() {
if (saved) {
bfseek(f, savePos, SEEK_SET);
saved = gFalse;
}
}
GBool bonoboStream::fillBuf() {
int n;
#ifndef NO_DECRYPTION
char *p;
#endif
bufPos += bufEnd - buf;
bufPtr = bufEnd = buf;
if (limited && bufPos >= start + length) {
return gFalse;
}
if (limited && bufPos + bonoboStreamBufSize > start + length) {
n = start + length - bufPos;
} else {
n = bonoboStreamBufSize;
}
n = bfread(buf, 1, n, f);
bufEnd = buf + n;
if (bufPtr >= bufEnd) {
return gFalse;
}
#ifndef NO_DECRYPTION
if (decrypt) {
for (p = buf; p < bufEnd; ++p) {
*p = (char)decrypt->decryptByte((Guchar)*p);
}
}
#endif
return gTrue;
}
void bonoboStream::setPos(Guint pos, int dir) {
Guint size;
if (dir >= 0) {
bfseek(f, pos, SEEK_SET);
bufPos = pos;
} else {
bfseek(f, 0, SEEK_END);
size = (Guint)bftell(f);
if (pos > size)
pos = (Guint)size;
bfseek(f, -(int)pos, SEEK_END);
bufPos = (Guint)bftell(f);
}
bufPtr = bufEnd = buf;
}
void bonoboStream::moveStart(int delta) {
start += delta;
bufPtr = bufEnd = buf;
bufPos = start;
}
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