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recover error stream from dimacs

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2018-11-12 15:33:46 -08:00
parent ef9b46b2e5
commit 9b4cf1559d
4 changed files with 36 additions and 25 deletions
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47
src/sat/dimacs.cpp
View file

@ -21,6 +21,8 @@ Revision History:
#undef min
#include "sat/sat_solver.h"
struct lex_error {};
class stream_buffer {
std::istream & m_stream;
int m_val;
@ -67,7 +69,7 @@ void skip_line(Buffer & in) {
}
template<typename Buffer>
int parse_int(Buffer & in) {
int parse_int(Buffer & in, std::ostream& err) {
int val = 0;
bool neg = false;
skip_whitespace(in);
@ -81,9 +83,8 @@ int parse_int(Buffer & in) {
}
if (*in < '0' || *in > '9') {
std::cerr << "(error, \"unexpected char: " << *in << " line: " << in.line() << "\")\n";
exit(3);
exit(ERR_PARSER);
err << "(error, \"unexpected char: " << *in << " line: " << in.line() << "\")\n";
throw lex_error();
}
while (*in >= '0' && *in <= '9') {
@ -95,14 +96,14 @@ int parse_int(Buffer & in) {
}
template<typename Buffer>
void read_clause(Buffer & in, sat::solver & solver, sat::literal_vector & lits) {
void read_clause(Buffer & in, std::ostream& err, sat::solver & solver, sat::literal_vector & lits) {
int parsed_lit;
int var;
lits.reset();
while (true) {
parsed_lit = parse_int(in);
parsed_lit = parse_int(in, err);
if (parsed_lit == 0)
break;
var = abs(parsed_lit);
@ -114,24 +115,30 @@ void read_clause(Buffer & in, sat::solver & solver, sat::literal_vector & lits)
}
template<typename Buffer>
void parse_dimacs_core(Buffer & in, sat::solver & solver) {
bool parse_dimacs_core(Buffer & in, std::ostream& err, sat::solver & solver) {
sat::literal_vector lits;
while (true) {
skip_whitespace(in);
if (*in == EOF) {
break;
}
else if (*in == 'c' || *in == 'p') {
skip_line(in);
}
else {
read_clause(in, solver, lits);
solver.mk_clause(lits.size(), lits.c_ptr());
try {
while (true) {
skip_whitespace(in);
if (*in == EOF) {
break;
}
else if (*in == 'c' || *in == 'p') {
skip_line(in);
}
else {
read_clause(in, err, solver, lits);
solver.mk_clause(lits.size(), lits.c_ptr());
}
}
}
catch (lex_error) {
return false;
}
return true;
}
void parse_dimacs(std::istream & in, sat::solver & solver) {
bool parse_dimacs(std::istream & in, std::ostream& err, sat::solver & solver) {
stream_buffer _in(in);
parse_dimacs_core(_in, solver);
return parse_dimacs_core(_in, err, solver);
}

2
src/sat/dimacs.h
View file

@ -21,7 +21,7 @@ Revision History:
#include "sat/sat_types.h"
void parse_dimacs(std::istream & s, sat::solver & solver);
bool parse_dimacs(std::istream & s, std::ostream& err, sat::solver & solver);
#endif /* DIMACS_PARSER_H_ */