/*
* Changes the size of the buffer to contain at least newsize bytes
*/
void change_buffer_size(const size_t newsize) {
if ( BUFFER_PTR == NULL )
{
if ((BUFFER_PTR = malloc( BLOCK_SIZE < newsize ? newsize : BLOCK_SIZE)) == NULL) {
YAP_Error(0,0,"Prolog2Term: Out of memory.\n");
#ifdef MPI
MPI_Finalize();
#endif
YAP_Exit( 1 );
}
}
else if ((BUFFER_SIZE>=BLOCK_SIZE &&
BUFFER_SIZE>=newsize) )
{
return;
}
else if ((BUFFER_PTR = realloc( BUFFER_PTR, newsize)) == NULL) {
YAP_Error(0,0,"Prolog2Term: Out of memory.\n");
#ifdef MPI
MPI_Finalize();
#endif
YAP_Exit( 1 );
}
BUFFER_SIZE=newsize;
}
/* execute a command as a detached process */
static YAP_Bool do_shell(void) {
#if defined(__MINGW32__) || _MSC_VER
YAP_Error(0, 0L, "system not available in this configuration");
return (FALSE);
#elif HAVE_SYSTEM
char *buf = YAP_AllocSpaceFromYap(BUF_SIZE);
int sys;
if (buf == NULL) {
YAP_Error(0, 0L, "No Temporary Space for Shell");
return (FALSE);
}
#if HAVE_STRNCPY
strncpy(buf, YAP_AtomName(YAP_AtomOfTerm(YAP_ARG1)), BUF_SIZE);
strncpy(buf, " ", BUF_SIZE);
strncpy(buf, YAP_AtomName(YAP_AtomOfTerm(YAP_ARG2)), BUF_SIZE);
strncpy(buf, " ", BUF_SIZE);
strncpy(buf, YAP_AtomName(YAP_AtomOfTerm(YAP_ARG3)), BUF_SIZE);
#else
strcpy(buf, YAP_AtomName(YAP_AtomOfTerm(YAP_ARG1)));
strcpy(buf, YAP_AtomName(YAP_AtomOfTerm(YAP_ARG2)));
strcpy(buf, " ");
strcpy(buf, YAP_AtomName(YAP_AtomOfTerm(YAP_ARG3)));
#endif
sys = system(buf);
YAP_FreeSpaceFromYap(buf);
if (sys < 0) {
return YAP_Unify(YAP_ARG5, YAP_MkIntTerm(errno));
}
return YAP_Unify(YAP_ARG4, YAP_MkIntTerm(sys));
#else
char *cptr[4];
int t;
int sys;
cptr[0] = (char *)YAP_AtomName(YAP_AtomOfTerm(YAP_ARG1));
cptr[1] = (char *)YAP_AtomName(YAP_AtomOfTerm(YAP_ARG2));
cptr[2] = (char *)YAP_AtomName(YAP_AtomOfTerm(YAP_ARG3));
cptr[3] = NULL;
t = fork();
if (t < 0) {
return YAP_Unify(YAP_ARG5, YAP_MkIntTerm(errno));
} else if (t == 0) {
t = execvp(cptr[0], cptr);
return t;
} else {
t = wait(&sys);
if (t < 0) {
return YAP_Unify(YAP_ARG5, YAP_MkIntTerm(errno));
}
}
return YAP_Unify(YAP_ARG4, YAP_MkIntTerm(sys));
#endif
}
/* return YAP's environment */
static YAP_Bool p_environ(void) {
#if HAVE_ENVIRON && 0
#if HAVE__NSGETENVIRON
char **ptr = _NSGetEnviron();
#elif defined(__MINGW32__) || _MSC_VER
extern char **_environ;
char **ptr = _environ;
#else
extern char **environ;
char **ptr = environ;
#endif
YAP_Term t1 = YAP_ARG1;
long int i;
i = YAP_IntOfTerm(t1);
if (ptr[i] == NULL)
return (FALSE);
else {
YAP_Term t = YAP_BufferToString(ptr[i]);
return (YAP_Unify(t, YAP_ARG2));
}
#else
YAP_Error(0, 0L, "environ not available in this configuration");
return (FALSE);
#endif
}
/*
* Read a prolog term from a stream
* (the prolog term must have been writen by the write_term_to_stream)
*/
YAP_Term
read_term_from_stream(const int fd) {
size_t size;
RESET_BUFFER();
if (!read(fd,(void*)&size,sizeof(size_t))) { // read the size of the term
YAP_Error(0,0,"Prolog2Term: IO error in read.\n");
}
#ifdef DEBUG
write_msg(__FUNCTION__,__FILE__,__LINE__,"read_term_from_stream>>>>size:%d\n",size);
#endif
if ( size> BUFFER_SIZE)
expand_buffer(size-BUFFER_SIZE);
if (!read(fd,BUFFER_PTR,size)) {
YAP_Error(0,0,"Prolog2Term: IO error in read.\n");
}; // read term from stream
return YAP_ImportTerm( BUFFER_PTR);
}
/*
* Writes a term to a stream.
*/
size_t
write_term_to_stream(const int fd,const YAP_Term term) {
RESET_BUFFER();
printf("BUFFER_PTR=%p\n", BUFFER_PTR);
p2c_putt(term);
if (write(fd,(void*)BUFFER_PTR,BUFFER_LEN) < 0) { // write term
YAP_Error(0,0,"Prolog2Term: IO error in write.\n");
return -1;
}
return BUFFER_LEN;
}
/*
* Adds 'space' to the size of the currently allocated buffer
*/
static void
expand_buffer(const size_t space ) {
BUFFER_PTR = realloc( BUFFER_PTR, BUFFER_SIZE + space );
if( BUFFER_PTR == NULL ) {
YAP_Error(0,0,"Prolog2Term: Out of memory.\n");
#ifdef MPI
MPI_Finalize();
#endif
YAP_Exit( 1 );
}
BUFFER_SIZE+=space;
}
static int init_standard_system(int argc, char *argv[], YAP_init_args *iap) {
YAP_file_type_t BootMode = YAP_parse_yap_arguments(argc, argv, iap);
/* init memory */
iap->initial_file_type =
BootMode = YAP_Init(iap);
if (iap->ErrorNo) {
/* boot failed */
YAP_Error(iap->ErrorNo, 0L, iap->ErrorCause);
}
return BootMode;
}
/** @pred system(+ _S_)
Passes command _S_ to the Bourne shell (on UNIX environments) or the
current command interpreter in WIN32 environments.
Note that it executes them command as a detached process. It requires
`system` to be implemented by the system library.
*/
static YAP_Bool do_system(void) {
char *command = (char *)YAP_AtomName(YAP_AtomOfTerm(YAP_ARG1));
#if HAVE_SYSTEM
int sys = system(command);
if (sys < 0) {
return YAP_Unify(YAP_ARG3, YAP_MkIntTerm(errno));
}
return YAP_Unify(YAP_ARG2, YAP_MkIntTerm(sys));
#else
YAP_Error(0, 0L, "system not available in this configuration, trying %s",
command);
return FALSE;
#endif
}
/*
* Changes the size of the buffer to contain at least newsize bytes
*/
void
change_buffer_size(const size_t newsize) {
if ( BUFFER_SIZE>=BLOCK_SIZE && BUFFER_SIZE>newsize)
return;
if(BUFFER_PTR!=NULL)
free(BUFFER_PTR);
BUFFER_PTR = (char*)malloc(newsize);
if( BUFFER_PTR == NULL ) {
YAP_Error(0,0,"Prolog2Term: Out of memory.\n");
#ifdef MPI
MPI_Finalize();
#endif
YAP_Exit( 1 );
}
BUFFER_SIZE=newsize;
}
/*
* Adds 'space' to the size of the currently allocated buffer
*/
static void
expand_buffer(const size_t space ) {
char *oldblock;
// BUFFER_PTR = realloc( BUFFER_PTR, BUFFER_SIZE + space );
oldblock= BUFFER_PTR;
BUFFER_PTR = (char*)malloc( BUFFER_SIZE + space );
if( BUFFER_PTR == NULL ) {
YAP_Error(0,0,"Prolog2Term: Out of memory.\n");
#ifdef MPI
MPI_Finalize();
#endif
YAP_Exit( 1 );
}
memcpy(BUFFER_PTR,oldblock,BUFFER_SIZE);
if(oldblock!=NULL)
free(oldblock);
BUFFER_SIZE+=space;
}
static int
init_standard_system(int argc, char *argv[], YAP_init_args *iap)
{
int BootMode;
BootMode = YAP_parse_yap_arguments(argc,argv,iap);
/* init memory */
if (BootMode == YAP_BOOT_FROM_PROLOG ||
BootMode == YAP_FULL_BOOT_FROM_PROLOG) {
int NewBootMode = YAP_Init(iap);
if (NewBootMode != YAP_BOOT_FROM_PROLOG && BootMode != YAP_FULL_BOOT_FROM_PROLOG)
BootMode = NewBootMode;
} else {
BootMode = YAP_Init(iap);
}
if (iap->ErrorNo) {
/* boot failed */
YAP_Error(iap->ErrorNo,0L,iap->ErrorCause);
}
return BootMode;
}
