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#include "memory_rw.h"
#include <string.h>
#include <stdlib.h>
#include "plainstring.h"
#include "../simdebug.h"
#include "../simmem.h"
memory_rw_t::memory_rw_t( void *ptr, uint32 max, bool saving )
{
this->saving = saving;
this->ptr = (char *)ptr;
index = 0;
max_size = max;
overflow = false;
}
void memory_rw_t::rdwr(void *data, uint32 len)
{
if( len+index>max_size ) {
len = max_size-index;
overflow = true;
}
if(is_saving()) {
memmove(ptr+index, data, len);
}
else {
memmove(data, ptr+index, len);
}
index += len;
}
void memory_rw_t::rdwr_byte(sint8 &c)
{
rdwr(&c, sizeof(sint8));
}
void memory_rw_t::rdwr_byte(uint8 &c)
{
rdwr(&c, sizeof(uint8));
}
void memory_rw_t::rdwr_bool(bool &i)
{
uint8 b = i;
rdwr_byte(b);
i = b!=0;
}
void memory_rw_t::rdwr_short(sint16 &i)
{
#ifdef SIM_BIG_ENDIAN
sint16 ii;
if(is_saving()) {
ii = endian(i);
}
rdwr(&ii, sizeof(sint16));
if(is_loading()) {
i = endian(ii);
}
#else
rdwr(&i, sizeof(sint16));
#endif
}
void memory_rw_t::rdwr_short(uint16 &i)
{
sint16 ii=i;
rdwr_short(ii);
i = (uint16)ii;
}
void memory_rw_t::rdwr_long(sint32 &l)
{
#ifdef SIM_BIG_ENDIAN
sint32 ii;
if(is_saving()) {
ii = endian(l);
}
rdwr(&ii, sizeof(sint32));
if(is_loading()) {
l = endian(ii);
}
#else
rdwr(&l, sizeof(sint32));
#endif
}
void memory_rw_t::rdwr_long(uint32 &l)
{
sint32 ll=l;
rdwr_long(ll);
l = (uint32)ll;
}
void memory_rw_t::rdwr_longlong(sint64 &ll)
{
#ifdef SIM_BIG_ENDIAN
sint64 ii;
if(is_saving()) {
ii = endian(ii);
}
rdwr(&ii, sizeof(sint64));
if(is_loading()) {
ll = endian(ii);
}
#else
rdwr(&ll, sizeof(sint64));
#endif
}
void memory_rw_t::rdwr_str(char *&s)
{
// string length
uint16 len;
if(is_saving()) {
len = s ? strlen(s) : 0;
}
rdwr_short(len);
// now the string
if (is_saving()) {
if(len>0 && !overflow) {
rdwr( s, len);
}
}
else {
free( (void *)s );
s = 0;
if(len>0 && !overflow) {
s = MALLOCN(char, len + 1);
rdwr(s, len);
s[len] = '\0';
}
}
}
void memory_rw_t::rdwr_str(plainstring& s)
{
if (is_loading()) {
char *buf = NULL;
rdwr_str(buf);
s = buf;
free(buf);
} else {
rdwr_str((char*&)s);
}
}
void memory_rw_t::append(const memory_rw_t &mem)
{
assert(saving && mem.saving);
rdwr(mem.ptr, mem.get_current_index());
}
void memory_rw_t::append_tail(const memory_rw_t &mem)
{
assert(saving && !mem.saving);
rdwr(mem.ptr + mem.get_current_index(), mem.max_size - mem.get_current_index());
}
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