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Improve p_* functions in smtio.py

This commit is contained in:
Clifford Wolf 2017-10-25 15:45:32 +02:00
parent 104b9dc96b
commit 76326c163a
1 changed files with 19 additions and 21 deletions
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40
backends/smt2/smtio.py
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@ -127,7 +127,7 @@ class SmtIo:
if self.dummy_file is not None:
self.dummy_fd = open(self.dummy_file, "w")
if not self.noincr:
self.p = subprocess.Popen(self.popen_vargs, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
self.p_open()
if self.unroll:
self.logic_uf = False
@ -210,19 +210,24 @@ class SmtIo:
return stmt
def p_write(self, data):
# select_result = select([self.p.stdout], [self.p.stdin], [], 0.1):
wlen = self.p.stdin.write(data)
assert wlen == len(data)
def p_open(self):
self.p = subprocess.Popen(self.popen_vargs, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
def p_flush(self):
self.p.stdin.flush()
def p_write(self, data, flush):
self.p.stdin.write(bytes(data, "ascii"))
if flush:
self.p.stdin.flush()
def p_read(self):
if len(self.p_buffer) == 0:
return self.p.stdout.readline().decode("ascii")
assert 0
def p_close(self):
self.p.stdin.close()
self.p = None
self.p_buffer = []
def write(self, stmt, unroll=True):
if stmt.startswith(";"):
self.info(stmt)
@ -295,21 +300,17 @@ class SmtIo:
if self.solver != "dummy":
if self.noincr:
if self.p is not None and not stmt.startswith("(get-"):
self.p.stdin.close()
self.p = None
self.p_buffer = []
self.p_close()
if stmt == "(push 1)":
self.smt2cache.append(list())
elif stmt == "(pop 1)":
self.smt2cache.pop()
else:
if self.p is not None:
self.p_write(bytes(stmt + "\n", "ascii"))
self.p_flush()
self.p_write(stmt + "\n", True)
self.smt2cache[-1].append(stmt)
else:
self.p_write(bytes(stmt + "\n", "ascii"))
self.p_flush()
self.p_write(stmt + "\n", True)
def info(self, stmt):
if not stmt.startswith("; yosys-smt2-"):
@ -456,16 +457,13 @@ class SmtIo:
if self.solver != "dummy":
if self.noincr:
if self.p is not None:
self.p.stdin.close()
self.p = None
self.p_buffer = []
self.p = subprocess.Popen(self.popen_vargs, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
self.p_close()
self.p_open()
for cache_ctx in self.smt2cache:
for cache_stmt in cache_ctx:
self.p_write(bytes(cache_stmt + "\n", "ascii"))
self.p_write(cache_stmt + "\n", False)
self.p_write(bytes("(check-sat)\n", "ascii"))
self.p_flush()
self.p_write("(check-sat)\n", True)
if self.timeinfo:
i = 0