/** problem reading method of reader */
static
SCIP_DECL_READERREAD(readerReadFix)
{ /*lint --e{715}*/
assert(reader != NULL);
assert(strcmp(SCIPreaderGetName(reader), READER_NAME) == 0);
assert(result != NULL);
*result = SCIP_DIDNOTRUN;
if( SCIPgetStage(scip) < SCIP_STAGE_PROBLEM )
{
SCIPerrorMessage("reading of fixing file is only possible after a problem was created\n");
return SCIP_READERROR;
}
/* free transformed problem, s.t. fixings are applied to the original problem */
SCIP_CALL( SCIPfreeTransform(scip) );
/* read (partial) solution from fixing file */
SCIP_CALL( readSol(scip, filename) );
*result = SCIP_SUCCESS;
return SCIP_OKAY;
}
/** problem reading method of reader
*
* In order to determine the type of the file, we have to open it. Thus, it has to be opened
* twice. This might be removed, but is likely to not hurt the performance too much.
*/
static
SCIP_DECL_READERREAD(readerReadSol)
{ /*lint --e{715}*/
SCIP_FILE* file;
char buffer[SCIP_MAXSTRLEN];
char *s;
assert(reader != NULL);
assert(strcmp(SCIPreaderGetName(reader), READER_NAME) == 0);
assert(result != NULL);
*result = SCIP_DIDNOTRUN;
if( SCIPgetStage(scip) < SCIP_STAGE_PROBLEM )
{
SCIPerrorMessage("reading of solution file is only possible after a problem was created\n");
return SCIP_READERROR;
}
if( SCIPgetStage(scip) == SCIP_STAGE_SOLVED )
{
SCIPverbMessage(scip, SCIP_VERBLEVEL_NORMAL, NULL,
"primal solution from solution file <%s> was ignored - problem is already solved to optimality\n",
filename);
*result = SCIP_SUCCESS;
return SCIP_OKAY;
}
/* open input file in order to determine type */
file = SCIPfopen(filename, "r");
if( file == NULL )
{
SCIPerrorMessage("cannot open file <%s> for reading\n", filename);
SCIPprintSysError(filename);
return SCIP_NOFILE;
}
/* get next line */
if( SCIPfgets(buffer, (int) sizeof(buffer), file) == NULL )
{
SCIPerrorMessage("cannot parse file.\n");
return SCIP_READERROR;
}
/* close file */
SCIPfclose(file);
/* decide whether it is xml */
s = buffer;
/* skip spaces */
while( isspace((unsigned char)*s) )
++s;
if( s[0] == '<' && s[1] == '?' && s[2] == 'x' && s[3] == 'm' && s[4] == 'l' )
{
/* read XML solution and add it to the solution pool */
SCIP_CALL( readXMLSol(scip, filename) );
}
else
{
/* read the solution and add it to the solution pool */
SCIP_CALL( readSol(scip, filename) );
}
*result = SCIP_SUCCESS;
return SCIP_OKAY;
}
