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/*
* $Header$
*
* Copyright 2006 Massachusetts Institute of Technology.
* All Rights Reserved.
*
* Export of this software from the United States of America may
* require a specific license from the United States Government.
* It is the responsibility of any person or organization contemplating
* export to obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of M.I.T. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. Furthermore if you modify this software you must label
* your software as modified software and not distribute it in such a
* fashion that it might be confused with the original M.I.T. software.
* M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*/
#include "cci_common.h"
#if TARGET_OS_MAC
#include <architecture/byte_order.h>
#if !defined(htonll)
#define htonll(x) OSSwapHostToBigInt64(x)
#endif
#if !defined(ntohll)
#define ntohll(x) OSSwapBigToHostInt64(x)
#endif
#endif /* TARGET_OS_MAC */
struct cci_stream_d {
char *data;
cc_uint64 size;
cc_uint64 max_size;
};
const struct cci_stream_d cci_stream_initializer = { NULL, 0, 0 };
#define CC_STREAM_SIZE_INCREMENT 128
/* ------------------------------------------------------------------------ */
static cc_uint32 cci_stream_reallocate (cci_stream_t io_stream,
cc_uint64 in_new_size)
{
cc_int32 err = ccNoError;
cc_uint64 new_max_size = 0;
if (!io_stream) { err = cci_check_error (ccErrBadParam); }
if (!err) {
cc_uint64 old_max_size = io_stream->max_size;
new_max_size = io_stream->max_size;
if (in_new_size > old_max_size) {
/* Expand the stream */
while (in_new_size > new_max_size) {
new_max_size += CC_STREAM_SIZE_INCREMENT;
}
} else if ((in_new_size + CC_STREAM_SIZE_INCREMENT) < old_max_size) {
/* Shrink the array, but never drop below CC_LIST_COUNT_INCREMENT */
while ((in_new_size + CC_STREAM_SIZE_INCREMENT) < new_max_size &&
(new_max_size > CC_STREAM_SIZE_INCREMENT)) {
new_max_size -= CC_STREAM_SIZE_INCREMENT;
}
}
}
if (!err && new_max_size != io_stream->max_size) {
char *data = io_stream->data;
if (!data) {
data = malloc (new_max_size * sizeof (*data));
} else {
data = realloc (data, new_max_size * sizeof (*data));
}
if (data) {
io_stream->data = data;
io_stream->max_size = new_max_size;
} else {
err = cci_check_error (ccErrNoMem);
}
}
return cci_check_error (err);
}
/* ------------------------------------------------------------------------ */
cc_int32 cci_stream_new (cci_stream_t *out_stream)
{
cc_int32 err = ccNoError;
cci_stream_t stream = NULL;
if (!out_stream) { err = cci_check_error (ccErrBadParam); }
if (!err) {
stream = malloc (sizeof (*stream));
if (stream) {
*stream = cci_stream_initializer;
} else {
err = cci_check_error (ccErrNoMem);
}
}
if (!err) {
*out_stream = stream;
stream = NULL;
}
cci_stream_release (stream);
return cci_check_error (err);
}
/* ------------------------------------------------------------------------ */
cc_uint32 cci_stream_release (cci_stream_t io_stream)
{
cc_int32 err = ccNoError;
if (!io_stream) { err = ccErrBadParam; }
if (!err) {
free (io_stream->data);
free (io_stream);
}
return err;
}
/* ------------------------------------------------------------------------ */
cc_uint64 cci_stream_size (cci_stream_t in_stream)
{
return in_stream ? in_stream->size : 0;
}
/* ------------------------------------------------------------------------ */
const char *cci_stream_data (cci_stream_t in_stream)
{
return in_stream ? in_stream->data : NULL;
}
#pragma mark -
/* ------------------------------------------------------------------------ */
cc_uint32 cci_stream_read (cci_stream_t io_stream,
void *io_data,
cc_uint64 in_size)
{
cc_int32 err = ccNoError;
if (!io_stream) { err = cci_check_error (ccErrBadParam); }
if (!io_data ) { err = cci_check_error (ccErrBadParam); }
if (!err) {
if (in_size > io_stream->size) {
err = cci_check_error (ccErrBadInternalMessage);
}
}
if (!err) {
memcpy (io_data, io_stream->data, in_size);
memmove (io_stream->data, &io_stream->data[in_size],
io_stream->size - in_size);
err = cci_stream_reallocate (io_stream, io_stream->size - in_size);
if (!err) {
io_stream->size -= in_size;
}
}
return cci_check_error (err);
}
/* ------------------------------------------------------------------------ */
cc_uint32 cci_stream_write (cci_stream_t io_stream,
const void *in_data,
cc_uint64 in_size)
{
cc_int32 err = ccNoError;
if (!io_stream) { err = cci_check_error (ccErrBadParam); }
if (!in_data ) { err = cci_check_error (ccErrBadParam); }
if (!err) {
/* Security check: Do not let the caller overflow the length */
if (in_size > (UINT64_MAX - io_stream->size)) {
err = cci_check_error (ccErrBadParam);
}
}
if (!err) {
err = cci_stream_reallocate (io_stream, io_stream->size + in_size);
}
if (!err) {
memcpy (&io_stream->data[io_stream->size], in_data, in_size);
io_stream->size += in_size;
}
return cci_check_error (err);
}
#pragma mark -
/* ------------------------------------------------------------------------ */
cc_uint32 cci_stream_read_string (cci_stream_t io_stream,
char **out_string)
{
cc_int32 err = ccNoError;
cc_uint32 length = 0;
char *string = NULL;
if (!io_stream ) { err = cci_check_error (ccErrBadParam); }
if (!out_string) { err = cci_check_error (ccErrBadParam); }
if (!err) {
err = cci_stream_read_uint32 (io_stream, &length);
}
if (!err) {
string = malloc (length);
if (!string) { err = cci_check_error (ccErrNoMem); }
}
if (!err) {
err = cci_stream_read (io_stream, string, length);
}
if (!err) {
*out_string = string;
string = NULL;
}
free (string);
return cci_check_error (err);
}
/* ------------------------------------------------------------------------ */
cc_uint32 cci_stream_write_string (cci_stream_t io_stream,
const char *in_string)
{
cc_int32 err = ccNoError;
cc_uint32 length = 0;
if (!io_stream) { err = cci_check_error (ccErrBadParam); }
if (!in_string) { err = cci_check_error (ccErrBadParam); }
if (!err) {
length = strlen (in_string) + 1;
err = cci_stream_write_uint32 (io_stream, length);
}
if (!err) {
err = cci_stream_write (io_stream, in_string, length);
}
return cci_check_error (err);
}
#pragma mark -
/* ------------------------------------------------------------------------ */
cc_uint32 cci_stream_read_int32 (cci_stream_t io_stream,
cc_int32 *out_int32)
{
cc_int32 err = ccNoError;
cc_int32 int32 = 0;
if (!io_stream) { err = cci_check_error (ccErrBadParam); }
if (!out_int32) { err = cci_check_error (ccErrBadParam); }
if (!err) {
err = cci_stream_read (io_stream, &int32, sizeof (int32));
}
if (!err) {
*out_int32 = ntohl (int32);
}
return cci_check_error (err);
}
/* ------------------------------------------------------------------------ */
cc_uint32 cci_stream_write_int32 (cci_stream_t io_stream,
cc_int32 in_int32)
{
cc_int32 err = ccNoError;
cc_int32 int32 = htonl (in_int32);
if (!io_stream) { err = cci_check_error (ccErrBadParam); }
if (!err) {
err = cci_stream_write (io_stream, &int32, sizeof (int32));
}
return cci_check_error (err);
}
#pragma mark -
/* ------------------------------------------------------------------------ */
cc_uint32 cci_stream_read_uint32 (cci_stream_t io_stream,
cc_uint32 *out_uint32)
{
cc_int32 err = ccNoError;
cc_uint32 uint32 = 0;
if (!io_stream) { err = cci_check_error (ccErrBadParam); }
if (!out_uint32) { err = cci_check_error (ccErrBadParam); }
if (!err) {
err = cci_stream_read (io_stream, &uint32, sizeof (uint32));
}
if (!err) {
*out_uint32 = ntohl (uint32);
}
return cci_check_error (err);
}
/* ------------------------------------------------------------------------ */
cc_uint32 cci_stream_write_uint32 (cci_stream_t io_stream,
cc_uint32 in_uint32)
{
cc_int32 err = ccNoError;
cc_int32 uint32 = htonl (in_uint32);
if (!io_stream) { err = cci_check_error (ccErrBadParam); }
if (!err) {
err = cci_stream_write (io_stream, &uint32, sizeof (uint32));
}
return cci_check_error (err);
}
#pragma mark -
/* ------------------------------------------------------------------------ */
cc_uint32 cci_stream_read_int64 (cci_stream_t io_stream,
cc_int64 *out_int64)
{
cc_int32 err = ccNoError;
cc_uint64 int64 = 0;
if (!io_stream) { err = cci_check_error (ccErrBadParam); }
if (!out_int64) { err = cci_check_error (ccErrBadParam); }
if (!err) {
err = cci_stream_read (io_stream, &int64, sizeof (int64));
}
if (!err) {
*out_int64 = ntohll (int64);
}
return cci_check_error (err);
}
/* ------------------------------------------------------------------------ */
cc_uint32 cci_stream_write_int64 (cci_stream_t io_stream,
cc_int64 in_int64)
{
cc_int32 err = ccNoError;
cc_int64 int64 = htonll (in_int64);
if (!io_stream) { err = cci_check_error (ccErrBadParam); }
if (!err) {
err = cci_stream_write (io_stream, &int64, sizeof (int64));
}
return cci_check_error (err);
}
#pragma mark -
/* ------------------------------------------------------------------------ */
cc_uint32 cci_stream_read_uint64 (cci_stream_t io_stream,
cc_uint64 *out_uint64)
{
cc_int32 err = ccNoError;
cc_uint64 uint64 = 0;
if (!io_stream) { err = cci_check_error (ccErrBadParam); }
if (!out_uint64) { err = cci_check_error (ccErrBadParam); }
if (!err) {
err = cci_stream_read (io_stream, &uint64, sizeof (uint64));
}
if (!err) {
*out_uint64 = ntohll (uint64);
}
return cci_check_error (err);
}
/* ------------------------------------------------------------------------ */
cc_uint32 cci_stream_write_uint64 (cci_stream_t io_stream,
cc_uint64 in_uint64)
{
cc_int32 err = ccNoError;
cc_int64 uint64 = htonll (in_uint64);
if (!io_stream) { err = cci_check_error (ccErrBadParam); }
if (!err) {
err = cci_stream_write (io_stream, &uint64, sizeof (uint64));
}
return cci_check_error (err);
}
#pragma mark -
/* ------------------------------------------------------------------------ */
cc_uint32 cci_stream_read_time (cci_stream_t io_stream,
cc_time_t *out_time)
{
cc_int32 err = ccNoError;
cc_int64 t = 0;
if (!io_stream) { err = cci_check_error (ccErrBadParam); }
if (!out_time ) { err = cci_check_error (ccErrBadParam); }
if (!err) {
err = cci_stream_read_int64 (io_stream, &t);
}
if (!err) {
*out_time = t;
}
return cci_check_error (err);
}
/* ------------------------------------------------------------------------ */
cc_uint32 cci_stream_write_time (cci_stream_t io_stream,
cc_time_t in_time)
{
cc_int32 err = ccNoError;
if (!io_stream) { err = cci_check_error (ccErrBadParam); }
if (!err) {
err = cci_stream_write_int64 (io_stream, in_time);
}
return cci_check_error (err);
}
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