#include "config.h" #define PL_KERNEL 1 #include typedef int bool; /* atom_t macro layer */ #define NULL_ATOM ((atom_t)0) #include "atoms.h" #if HAVE_STRING_H #include #endif #define COMMON(X) X #ifdef HAVE_LOCALE_H #include #endif #include #include #if HAVE_SYS_PARAM_H #include //MAXPATHLEN #endif #if __YAP_PROLOG__ #include "pl-yap.h" #endif /******************************** * UTILITIES * *********************************/ #define ROUND(p, n) ((((p) + (n) - 1) & ~((n) - 1))) /******************************** * HASH TABLES * *********************************/ #include "pl-table.h" #include "SWI-Stream.h" #include "pl-os.h" #include "pl-error.h" /******************************** * BUFFERS * *********************************/ #include "pl-buffer.h" /******************************* * OPTION LISTS * *******************************/ #include "pl-opts.h" /******************************* * LIST BUILDING * *******************************/ #include "pl-privitf.h" // numbers typedef enum { V_INTEGER, /* integer (64-bit) value */ #ifdef O_GMP V_MPZ, /* mpz_t */ V_MPQ, /* mpq_t */ #endif V_REAL /* Floating point number (double) */ } numtype; typedef struct { numtype type; /* type of number */ union { double f; /* value as real */ int64_t i; /* value as integer */ word w[WORDS_PER_DOUBLE]; /* for packing/unpacking the double */ #ifdef O_GMP mpz_t mpz; /* GMP integer */ mpq_t mpq; /* GMP rational */ #endif } value; } number, *Number; typedef enum { CLN_NORMAL = 0, /* Normal mode */ CLN_ACTIVE, /* Started cleanup */ CLN_FOREIGN, /* Foreign hooks */ CLN_PROLOG, /* Prolog hooks */ CLN_SHARED, /* Unload shared objects */ CLN_DATA /* Remaining data */ } cleanup_status; typedef struct tempfile * TempFile; /* pl-os.c */ typedef struct canonical_dir * CanonicalDir; /* pl-os.c */ typedef struct on_halt * OnHalt; /* pl-os.c */ /* The GD global variable */ typedef struct { int io_initialised; cleanup_status cleaning; /* Inside PL_cleanup() */ struct { Table table; /* global (read-only) features */ } prolog_flag; struct { TempFile _tmpfile_head; TempFile _tmpfile_tail; CanonicalDir _canonical_dirlist; char * myhome; /* expansion of ~ */ char * fred; /* last expanded ~user */ char * fredshome; /* home of fred */ OnHalt on_halt_list; /* list of onhalt hooks */ int halting; /* process is shutting down */ int gui_app; /* Win32: Application is a gui app */ IOFUNCTIONS iofunctions; /* initial IO functions */ IOFUNCTIONS org_terminal; /* IO+Prolog terminal functions */ IOFUNCTIONS rl_functions; /* IO+Terminal+Readline functions */ } os; struct { atom_t * array; /* index --> atom */ size_t count; /* elements in array */ atom_t *for_code[256]; /* code --> one-char-atom */ } atoms; } gds_t; extern gds_t gds; #define GD (&gds) #define GLOBAL_LD (&gds) typedef struct { unsigned long flags; /* Fast access to some boolean Prolog flags */ } pl_features_t; #define truePrologFlag(flag) true(&LD->prolog_flag.mask, flag) #define setPrologFlagMask(flag) set(&LD->prolog_flag.mask, flag) #define clearPrologFlagMask(flag) clear(&LD->prolog_flag.mask, flag) // LOCAL variables (heap will get this form LOCAL #define FT_ATOM 0 /* atom feature */ #define FT_BOOL 1 /* boolean feature (true, false) */ #define FT_INTEGER 2 /* integer feature */ #define FT_TERM 3 /* term feature */ #define FT_INT64 4 /* passed as int64_t */ #define FT_MASK 0x0f /* mask to get type */ #define FF_READONLY 0x10 /* feature is read-only */ #define FF_KEEP 0x20 /* keep value it already set */ #define PLFLAG_CHARESCAPE 0x000001 /* handle \ in atoms */ #define PLFLAG_GC 0x000002 /* do GC */ #define PLFLAG_TRACE_GC 0x000004 /* verbose gc */ #define PLFLAG_TTY_CONTROL 0x000008 /* allow for tty control */ #define PLFLAG_READLINE 0x000010 /* readline is loaded */ #define PLFLAG_DEBUG_ON_ERROR 0x000020 /* start tracer on error */ #define PLFLAG_REPORT_ERROR 0x000040 /* print error message */ #define PLFLAG_FILE_CASE 0x000080 /* file names are case sensitive */ #define PLFLAG_FILE_CASE_PRESERVING 0x000100 /* case preserving file names */ #define PLFLAG_DOS_FILE_NAMES 0x000200 /* dos (8+3) file names */ #define ALLOW_VARNAME_FUNCTOR 0x000400 /* Read Foo(x) as 'Foo'(x) */ #define PLFLAG_ISO 0x000800 /* Strict ISO compliance */ #define PLFLAG_OPTIMISE 0x001000 /* -O: optimised compilation */ #define PLFLAG_FILEVARS 0x002000 /* Expand $var and ~ in filename */ #define PLFLAG_AUTOLOAD 0x004000 /* do autoloading */ #define PLFLAG_CHARCONVERSION 0x008000 /* do character-conversion */ #define PLFLAG_LASTCALL 0x010000 /* Last call optimization enabled? */ #define PLFLAG_EX_ABORT 0x020000 /* abort with exception */ #define PLFLAG_BACKQUOTED_STRING 0x040000 /* `a string` */ #define PLFLAG_SIGNALS 0x080000 /* Handle signals */ #define PLFLAG_DEBUGINFO 0x100000 /* generate debug info */ #define PLFLAG_FILEERRORS 0x200000 /* Edinburgh file errors */ typedef enum { OCCURS_CHECK_FALSE = 0, OCCURS_CHECK_TRUE, OCCURS_CHECK_ERROR } occurs_check_t; typedef struct { atom_t file; /* current source file */ int line; /* current line */ int linepos; /* position in the line */ int64_t character; /* current character location */ } source_location; typedef struct exception_frame /* PL_throw exception environments */ { struct exception_frame *parent; /* parent frame */ jmp_buf exception_jmp_env; /* longjmp environment */ } exception_frame; #define EXCEPTION_GUARDED(code, cleanup) \ { exception_frame __throw_env; \ __throw_env.parent = LD->exception.throw_environment; \ if ( setjmp(__throw_env.exception_jmp_env) != 0 ) \ { LD->exception.throw_environment = __throw_env.parent; \ cleanup; \ } else \ { LD->exception.throw_environment = &__throw_env; \ code; \ LD->exception.throw_environment = __throw_env.parent; \ } \ } /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - At times an abort is not allowed because the heap is inconsistent the programmer should call startCritical to start such a code region and endCritical to end it. MT/TBD: how to handle this gracefully in the multi-threading case. Does it mean anything? - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ /* vsc: needs defining */ #define startCritical #define endCritical /* The LD macro layer */ typedef struct PL_local_data { struct /* Local IO stuff */ { IOSTREAM *streams[6]; /* handles for standard streams */ struct input_context *input_stack; /* maintain input stream info */ struct output_context *output_stack; /* maintain output stream info */ } IO; struct { Table table; /* Feature table */ pl_features_t mask; /* Masked access to booleans */ int write_attributes; /* how to write attvars? */ occurs_check_t occurs_check; /* Unify and occurs check */ } feature; source_location read_source; /* file, line, char of last term */ struct { int active; /* doing pipe I/O */ jmp_buf context; /* context of longjmp() */ } pipe; struct { atom_t current; /* current global prompt */ atom_t first; /* how to prompt first line */ int first_used; /* did we do the first line? */ int next; /* prompt on next read operation */ } prompt; struct { Table table; /* Feature table */ pl_features_t mask; /* Masked access to booleans */ int write_attributes; /* how to write attvars? */ occurs_check_t occurs_check; /* Unify and occurs check */ } prolog_flag; IOENC encoding; /* default I/O encoding */ struct { char * _CWDdir; size_t _CWDlen; #ifdef __BEOS__ status_t dl_error; /* dlopen() emulation in pl-beos.c */ #endif int rand_initialised; /* have we initialised random? */ } os; struct { term_t term; /* exception term */ term_t bin; /* temporary handle for exception */ term_t printed; /* already printed exception */ term_t tmp; /* tmp for errors */ term_t pending; /* used by the debugger */ int in_hook; /* inside exception_hook() */ exception_frame *throw_environment; /* PL_throw() environments */ } exception; const char *float_format; /* floating point format */ buffer discardable_buffer; /* PL_*() character buffers */ buffer buffer_ring[BUFFER_RING_SIZE]; int current_buffer_id; } PL_local_data_t; #define features (LD->feature.mask) extern PL_local_data_t lds; #define exception_term (LD->exception.term) // THIS HAS TO BE ABSTRACTED #define LD (&lds) #define LOCAL_LD (&lds) #define ARG_LD #define GET_LD #define PRED_LD #define PASS_LD #define Suser_input (LD->IO.streams[0]) #define Suser_output (LD->IO.streams[1]) #define Suser_error (LD->IO.streams[2]) #define Scurin (LD->IO.streams[3]) #define Scurout (LD->IO.streams[4]) #define Sprotocol (LD->IO.streams[5]) #define Sdin Suser_input /* not used for now */ #define Sdout Suser_output #define source_line_no (LD->read_source.line) #define source_file_name (LD->read_source.file) /* Support PL_LOCK in the interface */ #define PL_LOCK(X) #define PL_UNLOCK(X) #ifndef TRUE #define TRUE 1 #define FALSE 0 #endif #define succeed return TRUE #define fail return FALSE #define TRY(goal) if ((goal) == FALSE) fail extern int fileerrors; extern int ttymode; #define CHARESCAPE_FEATURE 0x00001 /* handle \ in atoms */ #define GC_FEATURE 0x00002 /* do GC */ #define TRACE_GC_FEATURE 0x00004 /* verbose gc */ #define TTY_CONTROL_FEATURE 0x00008 /* allow for tty control */ #define READLINE_FEATURE 0x00010 /* readline is loaded */ #define DEBUG_ON_ERROR_FEATURE 0x00020 /* start tracer on error */ #define REPORT_ERROR_FEATURE 0x00040 /* print error message */ #define FILE_CASE_FEATURE 0x00080 /* file names are case sensitive */ #define FILE_CASE_PRESERVING_FEATURE 0x0100 /* case preserving file names */ #define DOS_FILE_NAMES_FEATURE 0x00200 /* dos (8+3) file names */ #define ISO_FEATURE 0x00800 /* Strict ISO compliance */ #define OPTIMISE_FEATURE 0x01000 /* -O: optimised compilation */ #define FILEVARS_FEATURE 0x02000 /* Expand $var and ~ in filename */ #define AUTOLOAD_FEATURE 0x04000 /* do autoloading */ #define CHARCONVERSION_FEATURE 0x08000 /* do character-conversion */ #define LASTCALL_FEATURE 0x10000 /* Last call optimization enabled? */ #define EX_ABORT_FEATURE 0x20000 /* abort with exception */ #define BACKQUOTED_STRING_FEATURE 0x40000 /* `a string` */ #define SIGNALS_FEATURE 0x80000 /* Handle signals */ #define DEBUGINFO_FEATURE 0x100000 /* generate debug info */ int defFeature(const char *c, int f, ...); int trueFeature(int f); /******************************* * STREAM I/O * *******************************/ #define REDIR_MAGIC 0x23a9bef3 typedef struct redir_context { int magic; /* REDIR_MAGIC */ IOSTREAM *stream; /* temporary output */ int is_stream; /* redirect to stream */ int redirected; /* output is redirected */ term_t term; /* redirect target */ int out_format; /* output type */ int out_arity; /* 2 for difference-list versions */ size_t size; /* size of I/O buffer */ char *data; /* data written */ char buffer[1024]; /* fast temporary buffer */ } redir_context; /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Defining built-in predicates using the new interface - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ #define EOS '\0' #define ESC ((char) 27) #define streq(s, q) ((strcmp((s), (q)) == 0)) #define CHAR_MODE 0 /* See PL_unify_char() */ #define CODE_MODE 1 #define BYTE_MODE 2 /* string stuff */ /******************************* * STRING SUPPORT * *******************************/ char * store_string(const char *s); void remove_string(char *s); /* from foreign interface */ /******************************* * FILENAME SUPPORT * *******************************/ #define PL_FILE_ABSOLUTE 0x01 /* return absolute path */ #define PL_FILE_OSPATH 0x02 /* return path in OS notation */ #define PL_FILE_SEARCH 0x04 /* use file_search_path */ #define PL_FILE_EXIST 0x08 /* demand file to exist */ #define PL_FILE_READ 0x10 /* demand read-access */ #define PL_FILE_WRITE 0x20 /* demand write-access */ #define PL_FILE_EXECUTE 0x40 /* demand execute-access */ #define PL_FILE_NOERRORS 0x80 /* do not raise exceptions */ #define PL_FA_ISO (0x20) /* Internal: ISO core predicate */ /******************************** * READ WARNINGS * *********************************/ #define ReadingSource (source_line_no > 0 && \ source_file_name != NULL_ATOM) #include typedef double real; #define true(s, a) ((s)->flags & (a)) #define false(s, a) (!true((s), (a))) #define set(s, a) ((s)->flags |= (a)) #define clear(s, a) ((s)->flags &= ~(a)) #define DEBUG(LEVEL, COMMAND) #define forwards static /* forwards function declarations */ /* uxnt package interface */ #if defined(__YAP_PROLOG__) && defined(__MINGW32__) #define O_XOS 1 #define _XOS_ISFILE 0x01 #define _XOS_ISDIR 0x02 #define _XOS_FILE 0x0001 /* is a file */ #define _XOS_DIR 0x0002 /* is a directory */ #define XOS_DOWNCASE 0x01 /* _xos_canonical_filename() */ #ifndef __WINDOWS__ #define __WINDOWS__ 1 #endif #endif #define PL_dispatch(FD, COM) extern int PL_unify_char(term_t chr, int c, int how); extern int PL_get_char(term_t chr, int *c, int eof); extern int PL_get_text(term_t l, PL_chars_t *text, int flags); extern void PL_cleanup_fork(void); extern int PL_rethrow(void); extern void PL_get_number(term_t l, number *n); extern int PL_write_term(IOSTREAM *s, term_t term, int precedence, int flags); extern int PL_unify_atomic(term_t t, PL_atomic_t a); #define _PL_get_arg(X,Y,Z) PL_get_arg(X,Y,Z) #define _PL_unify_atomic PL_unify_atomic extern IOSTREAM ** /* provide access to Suser_input, */ _PL_streams(void); /* Suser_output and Suser_error */ #define PL_get_text__LD PL_get_text #define getInputStream__LD getInputStream extern int get_atom_text(atom_t atom, PL_chars_t *text); extern int get_string_text(word w, PL_chars_t *text); extern char *format_float(double f, char *buf, const char *format); /**** stuff from pl-ctype.c ****/ extern IOENC initEncoding(void); /**** stuff from pl-error.c ****/ extern int PL_get_bool_ex(term_t t, int *i); extern int PL_get_nchars_ex(term_t t, size_t *len, char **s, unsigned int flags); extern int PL_get_chars_ex(term_t t, char **s, unsigned int flags); extern int PL_get_atom_ex(term_t t, atom_t *a); extern int PL_get_integer_ex(term_t t, int *i); extern int PL_get_long_ex(term_t t, long *i); extern int PL_get_int64_ex(term_t t, int64_t *i); extern int PL_get_intptr_ex(term_t t, intptr_t *i); extern int PL_get_bool_ex(term_t t, int *i); extern int PL_get_float_ex(term_t t, double *f); extern int PL_get_char_ex(term_t t, int *p, int eof); extern int PL_unify_list_ex(term_t l, term_t h, term_t t); extern int PL_unify_nil_ex(term_t l); extern int PL_get_list_ex(term_t l, term_t h, term_t t); extern int PL_get_nil_ex(term_t l); extern int PL_get_module_ex(term_t name, module_t *m); extern int PL_unify_bool_ex(term_t t, bool val); extern int PL_unify_bool_ex(term_t t, bool val); extern int PL_get_bool_ex(term_t t, int *i); extern int PL_get_integer_ex(term_t t, int *i); /**** stuff from pl-file.c ****/ extern void initIO(void); extern void dieIO(void); extern void protocol(const char *str, size_t n); extern bool readLine(IOSTREAM *in, IOSTREAM *out, char *buffer); extern bool tellString(char **s, size_t *size, IOENC enc); extern bool tellString(char **s, size_t *size, IOENC enc); extern bool toldString(void); extern int setupOutputRedirect(term_t to, redir_context *ctx, int redir); extern void discardOutputRedirect(redir_context *ctx); extern int closeOutputRedirect(redir_context *ctx); extern IOENC atom_to_encoding(atom_t); void closeFiles(int); atom_t PrologPrompt(void); word pl_current_input(term_t); word pl_current_output(term_t); word pl_exists_file(term_t name); char *DirName(const char *f, char *dir); void outOfCore(void); word pl_noprotocol(void); IOSTREAM *PL_current_input(void); IOSTREAM *PL_current_output(void); PL_EXPORT(int) PL_open_stream(term_t t, IOSTREAM *s); PL_EXPORT(int) PL_unify_stream(term_t t, IOSTREAM *s); PL_EXPORT(int) PL_unify_stream_or_alias(term_t t, IOSTREAM *s); PL_EXPORT(int) PL_get_stream_handle(term_t t, IOSTREAM **s); PL_EXPORT(void) PL_write_prompt(int); PL_EXPORT(int) PL_release_stream(IOSTREAM *s); /**** stuff from pl-error.c ****/ extern void outOfCore(void); extern void fatalError(const char *fm, ...); extern void printMessage(int type, ...); extern int callProlog(void * module, term_t goal, int flags, term_t *ex); extern word notImplemented(char *name, int arity); /**** stuff from pl-ctype.c ****/ extern void initCharTypes(void); /**** stuff from pl-os.c ****/ extern void cleanupOs(void); extern void PL_clock_wait_ticks(long waited); extern void setOSFeatures(void); extern uintptr_t FreeMemory(void); extern uint64_t _PL_Random(void); extern void RemoveTemporaryFiles(void); extern int Pause(real t); char *findExecutable(const char *av0, char *buffer); void setOSPrologFlags(void); void setRandom(unsigned int *seedp); char *canoniseFileName(char *path); char *canonisePath(char *path); void PL_changed_cwd(void); struct tm *LocalTime(long *t, struct tm *r); size_t getenv3(const char *name, char *buf, size_t len); int Setenv(char *name, char *value); int Unsetenv(char *name); int System(char *cmd); bool expandVars(const char *pattern, char *expanded, int maxlen); /**** SWI stuff (emulated in pl-yap.c) ****/ extern int writeAtomToStream(IOSTREAM *so, atom_t at); extern int valueExpression(term_t t, Number r ARG_LD); extern word lookupAtom(const char *s, size_t len); extern atom_t lookupUCSAtom(const pl_wchar_t *s, size_t len); extern int toIntegerNumber(Number n, int flags); extern int get_atom_ptr_text(Atom a, PL_chars_t *text); /* empty stub */ void setPrologFlag(const char *name, int flags, ...); void PL_set_prolog_flag(const char *name, int flags, ...); static inline word setBoolean(int *flag, term_t old, term_t new) { if ( !PL_unify_bool_ex(old, *flag) || !PL_get_bool_ex(new, flag) ) fail; succeed; } static inline word setInteger(int *flag, term_t old, term_t new) { if ( !PL_unify_integer(old, *flag) || !PL_get_integer_ex(new, flag) ) fail; succeed; } #if defined(__SWI_PROLOG__) static inline word INIT_SEQ_CODES(size_t n) { return allocGlobal(1+(n)*3); /* TBD: shift */ } static inline word EXTEND_SEQ_CODES(word gstore, int c) { *gstore = consPtr(&gstore[1], TAG_COMPOUND|STG_GLOBAL); gstore++; *gstore++ = FUNCTOR_dot2; *gstore++ = consInt(c); return gstore; } static inline int CLOSE_SEQ_OF_CODES(word gstore, word lp, word A2, word A3)) { setVar(*gstore); gTop = gstore+1; a = valTermRef(A2); deRef(a); if ( !unify_ptrs(a, lp PASS_LD) ) return FALSE; a = valTermRef(A3); deRef(a); if ( !unify_ptrs(a, gstore PASS_LD) ) return FALSE; return TRUE; } #else #endif