static Int
peek_mem_write_stream ( USES_REGS1 )
{ /* '$peek_mem_write_stream'(+GLOBAL_Stream,?S0,?S) */
Int sno = Yap_CheckStream (ARG1, (Output_Stream_f | InMemory_Stream_f), "close/2");
Int i;
Term tf = ARG2;
CELL *HI;
const char *ptr;
if (sno < 0)
return (FALSE);
restart:
HI = HR;
#if MAY_WRITE
if (fflush(GLOBAL_Stream[sno].file) == 0) {
ptr = GLOBAL_Stream[sno].nbuf;
i = GLOBAL_Stream[sno].nsize;
}
#else
ptr = GLOBAL_Stream[sno].u.mem_string.buf;
i = GLOBAL_Stream[sno].u.mem_string.pos;
#endif
while (i > 0) {
--i;
tf = MkPairTerm(MkIntTerm(ptr[i]),tf);
if (HR + 1024 >= ASP) {
UNLOCK(GLOBAL_Stream[sno].streamlock);
HR = HI;
if (!Yap_gcl((ASP-HI)*sizeof(CELL), 3, ENV, Yap_gcP()) ) {
UNLOCK(GLOBAL_Stream[sno].streamlock);
Yap_Error(RESOURCE_ERROR_STACK, TermNil, LOCAL_ErrorMessage);
return(FALSE);
}
i = GLOBAL_Stream[sno].u.mem_string.pos;
tf = ARG2;
LOCK(GLOBAL_Stream[sno].streamlock);
goto restart;
}
}
UNLOCK(GLOBAL_Stream[sno].streamlock);
return (Yap_unify(ARG3,tf));
}
static Int read_stream_to_codes(USES_REGS1) {
int sno = Yap_CheckStream(ARG1, Input_Stream_f,
"reaMkAtomTerm (AtomEofd_line_to_codes/2");
CELL *HBASE = HR;
CELL *h0 = &ARG4;
if (sno < 0)
return FALSE;
while (!(GLOBAL_Stream[sno].status & Eof_Stream_f)) {
/* skip errors */
Int ch = GLOBAL_Stream[sno].stream_getc(sno);
Term t;
if (ch == EOFCHAR)
break;
t = MkIntegerTerm(ch);
h0[0] = AbsPair(HR);
*HR = t;
HR += 2;
h0 = HR - 1;
yhandle_t news, news1, st = Yap_StartSlots();
if (HR >= ASP - 1024) {
RESET_VARIABLE(h0);
news = Yap_InitSlot(AbsPair(HBASE));
news1 = Yap_InitSlot((CELL)(h0));
if (!Yap_gcl((ASP - HBASE) * sizeof(CELL), 3, ENV, Yap_gcP())) {
Yap_Error(RESOURCE_ERROR_STACK, ARG1, "read_stream_to_codes/3");
return false;
}
/* build a legal term again */
h0 = (CELL *)(Yap_GetFromSlot(news1));
HBASE = RepPair(Yap_GetFromSlot(news));
}
Yap_CloseSlots(st);
}
UNLOCK(GLOBAL_Stream[sno].streamlock);
if (HR == HBASE)
return Yap_unify(ARG2, ARG3);
RESET_VARIABLE(HR - 1);
Yap_unify(HR[-1], ARG3);
return Yap_unify(AbsPair(HBASE), ARG2);
}
static Int same_file(USES_REGS1) {
char *f1 = RepAtom(AtomOfTerm(Deref(ARG1)))->StrOfAE;
char *f2 = RepAtom(AtomOfTerm(Deref(ARG2)))->StrOfAE;
if (strcmp(f1, f2) == 0)
return TRUE;
#if HAVE_LSTAT
{
int out;
struct stat *b1, *b2;
while ((char *)HR + sizeof(struct stat) * 2 > (char *)(ASP - 1024)) {
if (!Yap_gcl(2 * sizeof(struct stat), 2, ENV, Yap_gcP())) {
Yap_Error(RESOURCE_ERROR_STACK, TermNil, LOCAL_ErrorMessage);
return FALSE;
}
}
b1 = (struct stat *)HR;
b2 = b1 + 1;
if (strcmp(f1, "user_input") == 0) {
if (fstat(fileno(GLOBAL_Stream[0].file), b1) == -1) {
/* file does not exist, but was opened? Return -1 */
return FALSE;
}
} else if (strcmp(f1, "user_output") == 0) {
if (fstat(fileno(GLOBAL_Stream[1].file), b1) == -1) {
/* file does not exist, but was opened? Return -1 */
return FALSE;
}
} else if (strcmp(f1, "user_error") == 0) {
if (fstat(fileno(GLOBAL_Stream[2].file), b1) == -1) {
/* file does not exist, but was opened? Return -1 */
return FALSE;
}
} else if (stat(f1, b1) == -1) {
/* file does not exist, but was opened? Return -1 */
return FALSE;
}
if (strcmp(f2, "user_input") == 0) {
if (fstat(fileno(GLOBAL_Stream[0].file), b2) == -1) {
/* file does not exist, but was opened? Return -1 */
return FALSE;
}
} else if (strcmp(f2, "user_output") == 0) {
if (fstat(fileno(GLOBAL_Stream[1].file), b2) == -1) {
/* file does not exist, but was opened? Return -1 */
return FALSE;
}
} else if (strcmp(f2, "user_error") == 0) {
if (fstat(fileno(GLOBAL_Stream[2].file), b2) == -1) {
/* file does not exist, but was opened? Return -1 */
return FALSE;
}
} else if (stat(f2, b2) == -1) {
/* file does not exist, but was opened? Return -1 */
return FALSE;
}
out = (b1->st_ino == b2->st_ino
#ifdef __LCC__
&& memcmp((const void *)&(b1->st_dev), (const void *)&(b2->st_dev),
sizeof(buf1.st_dev)) == 0
#else
&& b1->st_dev == b2->st_dev
#endif
);
return out;
}
#else
return (FALSE);
#endif
}
