/**
@brief parse elements in a list passed through use_module
@param[in] str: is the string to parse
@param[out] newlist: rlist of elements found
@retval 0: successful > 0: failed
*/
static int LaunchParsingMachine(const char *str, Rlist **newlist)
{
const char *s = str;
state current_state = ST_OPENED;
int ret;
Buffer *buf = BufferNewWithCapacity(CF_MAXVARSIZE);
assert(newlist);
while (current_state != ST_CLOSED && *s)
{
switch(current_state)
{
case ST_ERROR:
Log(LOG_LEVEL_ERR, "Parsing error : Malformed string");
ret = 1;
goto clean;
case ST_OPENED:
if (CLASS_BLANK(*s))
{
current_state = ST_OPENED;
}
else if (CLASS_BRA1(*s))
{
current_state = ST_IO;
}
else if (CLASS_ANY0(*s))
{
current_state = ST_ERROR;
}
s++;
break;
case ST_IO:
if (CLASS_BLANK(*s))
{
current_state = ST_IO;
}
else if (CLASS_START1(*s))
{
BufferClear(buf);
current_state = ST_ELM1;
}
else if (CLASS_START2(*s))
{
BufferClear(buf);
current_state = ST_ELM2;
}
else if (CLASS_ANY1(*s))
{
current_state = ST_ERROR;
}
s++;
break;
case ST_ELM1:
if (CLASS_END1(*s))
{
RlistAppendScalar(newlist, BufferData(buf));
BufferClear(buf);
current_state = ST_END1;
}
else if (CLASS_ANY2(*s))
{
BufferAppendChar(buf, *s);
current_state = ST_ELM1;
}
s++;
break;
case ST_ELM2:
if (CLASS_END2(*s))
{
RlistAppendScalar(newlist, BufferData(buf));
BufferClear(buf);
current_state = ST_END2;
}
else if (CLASS_ANY3(*s))
{
BufferAppendChar(buf, *s);
current_state = ST_ELM2;
}
s++;
break;
case ST_END1:
if (CLASS_SEP(*s))
{
current_state = ST_SEP;
}
else if (CLASS_BRA2(*s))
{
current_state = ST_PRECLOSED;
}
else if (CLASS_BLANK(*s))
{
current_state = ST_END1;
}
else if (CLASS_ANY4(*s))
{
current_state = ST_ERROR;
}
s++;
break;
case ST_END2:
if (CLASS_SEP(*s))
{
current_state = ST_SEP;
}
else if (CLASS_BRA2(*s))
{
current_state = ST_PRECLOSED;
}
else if (CLASS_BLANK(*s))
{
current_state = ST_END2;
}
else if (CLASS_ANY5(*s))
{
current_state = ST_ERROR;
}
s++;
break;
case ST_SEP:
if (CLASS_BLANK(*s))
{
current_state = ST_SEP;
}
else if (CLASS_START1(*s))
{
current_state = ST_ELM1;
}
else if (CLASS_START2(*s))
{
current_state = ST_ELM2;
}
else if (CLASS_ANY6(*s))
{
current_state = ST_ERROR;
}
s++;
break;
case ST_PRECLOSED:
if (CLASS_BLANK(*s))
{
current_state = ST_PRECLOSED;
}
else if (CLASS_EOL(*s))
{
current_state = ST_CLOSED;
}
else if (CLASS_ANY7(*s))
{
current_state = ST_ERROR;
}
s++;
break;
default:
Log(LOG_LEVEL_ERR, "Parsing logic error: unknown state");
ret = 2;
goto clean;
break;
}
}
if (current_state != ST_CLOSED && current_state != ST_PRECLOSED )
{
Log(LOG_LEVEL_ERR, "Parsing error : Malformed string (unexpected end of input)");
ret = 3;
goto clean;
}
BufferDestroy(buf);
return 0;
clean:
BufferDestroy(buf);
RlistDestroy(*newlist);
assert(ret != 0);
return ret;
}
/**
@brief parse elements in a list passed through use_module
@param[in] str: is the string to parse
@param[out] newlist: rlist of elements found
@retval 0: successful >0: failed
*/
static int LaunchParsingMachine(const char *str, Rlist **newlist)
{
const char *s = str;
state current_state = ST_OPENED;
int ret;
char snatched[CF_MAXVARSIZE];
snatched[0]='\0';
char *sn = NULL;
while (current_state != ST_CLOSED && *s)
{
switch(current_state) {
case ST_ERROR:
Log(LOG_LEVEL_ERR, "Parsing error : Malformed string");
ret = 1;
goto clean;
case ST_OPENED:
if (CLASS_BLANK(*s))
{
current_state = ST_OPENED;
}
else if (CLASS_BRA1(*s))
{
current_state = ST_IO;
}
else if (CLASS_ANY0(*s))
{
current_state = ST_ERROR;
}
s++;
break;
case ST_IO:
if (CLASS_BLANK(*s))
{
current_state = ST_IO;
}
else if (CLASS_START1(*s))
{
sn=snatched;
current_state = ST_ELM1;
}
else if (CLASS_START2(*s))
{
sn=snatched;
current_state = ST_ELM2;
}
else if (CLASS_ANY1(*s))
{
current_state = ST_ERROR;
}
s++;
break;
case ST_ELM1:
if (CLASS_END1(*s))
{
if (sn==NULL)
{
sn=snatched;
}
*sn='\0';
RlistAppendScalar(newlist, snatched);
sn=NULL;
current_state = ST_END1;
}
else if (CLASS_ANY2(*s))
{
if (sn==NULL)
{
sn=snatched;
}
*sn=*s;
sn++;
current_state = ST_ELM1;
}
s++;
break;
case ST_ELM2:
if (CLASS_END2(*s))
{
if (sn==NULL)
{
sn=snatched;
}
*sn='\0';
RlistAppendScalar(newlist, snatched);
sn=NULL;
current_state = ST_END2;
}
else if (CLASS_ANY3(*s))
{
if (sn==NULL)
{
sn=snatched;
}
*sn=*s;
sn++;
current_state = ST_ELM2;
}
s++;
break;
case ST_END1:
if (CLASS_SEP(*s))
{
current_state = ST_SEP;
}
else if (CLASS_BRA2(*s))
{
current_state = ST_PRECLOSED;
}
else if (CLASS_BLANK(*s))
{
current_state = ST_END1;
}
else if (CLASS_ANY4(*s))
{
current_state = ST_ERROR;
}
s++;
break;
case ST_END2:
if (CLASS_SEP(*s))
{
current_state = ST_SEP;
}
else if (CLASS_BRA2(*s))
{
current_state = ST_PRECLOSED;
}
else if (CLASS_BLANK(*s))
{
current_state = ST_END2;
}
else if (CLASS_ANY5(*s))
{
current_state = ST_ERROR;
}
s++;
break;
case ST_SEP:
if (CLASS_BLANK(*s))
{
current_state = ST_SEP;
}
else if (CLASS_START1(*s))
{
current_state = ST_ELM1;
}
else if (CLASS_START2(*s))
{
current_state = ST_ELM2;
}
else if (CLASS_ANY6(*s))
{
current_state = ST_ERROR;
}
s++;
break;
case ST_PRECLOSED:
if (CLASS_BLANK(*s))
{
current_state = ST_PRECLOSED;
}
else if (CLASS_EOL(*s))
{
current_state = ST_CLOSED;
}
else if (CLASS_ANY7(*s))
{
current_state = ST_ERROR;
}
s++;
break;
default:
Log(LOG_LEVEL_ERR, "Parsing logic error: unknown state");
ret = 2;
goto clean;
break;
}
}
if (current_state != ST_CLOSED && current_state != ST_PRECLOSED )
{
Log(LOG_LEVEL_ERR, "Parsing error : Malformed string (unexpected end of input)");
ret = 3;
goto clean;
}
return 0;
clean:
if (newlist)
{
RlistDestroy(*newlist);
}
return ret;
}