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pl-wic.c
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/* pl-wic.c,v 1.5 1993/02/23 13:16:50 jan Exp
Copyright (c) 1990 Jan Wielemaker. All rights reserved.
See ../LICENCE to find out about your rights.
jan@swi.psy.uva.nl
Purpose: load and save intermediate code files
*/
#include "pl-incl.h"
forwards char * getString P((FILE *));
forwards long getNum P((FILE *));
forwards real getReal P((FILE *));
forwards bool loadWicFd P((char *, FILE *, bool, bool));
forwards bool loadPredicate P((FILE *));
forwards bool loadExport P((FILE *));
forwards bool loadImport P((FILE *));
forwards void putString P((char *, FILE *));
forwards void putAtom P((Atom, FILE *));
forwards void putNum P((long, FILE *));
forwards void putReal P((real, FILE *));
forwards void saveWicClause P((Clause, FILE *));
forwards void closeProcedureWic P((void));
forwards void checkSource P((Atom));
forwards bool openWic P((char *));
forwards bool closeWic P((void));
forwards bool addClauseWic P((Word, Atom));
forwards bool addDirectiveWic P((word));
forwards bool startModuleWic P((Atom, SourceFile));
forwards bool exportWic P((Atom, int));
forwards bool importWic P((Atom, Atom, int));
forwards word directiveClause P((word, char *));
forwards bool compileFile P((char *));
forwards bool putStates P((FILE *));
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
SWI-Prolog can compile Prolog source files into intermediate code files,
which can be loaded very fast. They can be saved as stand alone
executables using Unix #! magic number.
A wic file consists of the magic code and a version check code. This is
followed by the command line option defaults. Then an optional series
of `include' statements follow. Finally the predicates and directives
are described. Predicates are described close to the internal
representation. Directives are described as Prolog source.
The default options and include statements are written incrementally in
each wic file. In the normal boot cycle first the boot file is
determined. Then the option structure is filled with the default option
found in this boot file. Next the command line arguments are scanned to
obtain all options. Then stacks, built in's, etc. are initialised.
The the boot file is read again, but now only scanning for directives
and predicates.
IF YOU CHANGE ANYTHING TO THIS FILE, SO THAT OLD WIC-FILES CAN NO LONGER
BE READ, PLEASE DO NOT FORGET TO INCREMENT THE VERSION NUMBER!
Below is an informal description of the format of a `wic' file:
<wic-file> ::= #!<path>
<magic code>
<version number>
<localSize> % a <word>
<globalSize> % a <word>
<trailSize> % a <word>
<argumentSize> % a <word>
<lockSize> % a <word>
<goal> % a <string>
<topLevel> % a <string>
<initFile> % a <string>
{<statement>}
<magic code> ::= <string> % normally #!<path>
<version number>::= <word>
<statement> ::= 'W' <string> % include wic file
| 'P' <num> <string>
{<clause>} <pattern> % predicate
| 'D' <string> % directive
| 'F' <string> <system> <time> % source file
| 'M' <string> <string> % start module in file
| 'E' <num> <string> % export predicate
| 'I' <string> <num> <string> % import predicate
<clause> ::= 'C' <n var> <n slots> <n clause> <externals> <codes> % clause
| 'X' % end of list
<externals> ::= <num> {<external>}
<external> ::= 'a' <string> % atom
'f' <num> <string> % functor
'p' <num> <string> % predicate
'e' <string> <num> <string> % extern predicate
'n' <word> % number
'r' <word> % real (float)
's' <string> % string
<system> ::= 's' % system source file
| 'u' % user source file
<time> ::= <word> % time file was loaded
<pattern> ::= <word> % indexing pattern
<codes> ::= <num> {<code>}
<string> ::= {<non-zero byte>} <0>
<word> ::= <4 byte entity>
Numbers are stored in a packed format to reduce the size of the
intermediate code file as 99% of them is normally small, but in
principle not limited (virtual machine codes, arities, table sizes,
etc). The upper two bits of the first byte contain the number of
additional bytes. the bytes represent the number `most-significant part
first'. See the functions putNum() and getNum() for details. Before
you don't agree to this schema, you should remember it makes the
intermediate code files about 30% smaller and avoids the differences
between 16 and 32 bits machines (arities on 16 bits machines are 16
bits) as well as machines with different byte order.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
#define VERSION 10 /* save version number */
static char saveMagic[] = "SWI-Prolog (c) 1990 Jan Wielemaker\n";
static char *wicFile; /* name of output file */
static FILE *wicFd; /* file descriptor of wic file */
static Procedure currentProc; /* current procedure */
static SourceFile currentSource; /* current source file */
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
On tos, loading takes long; give the user something to look at. On
workstations, it normally is so fast it is hardy noticable.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
#if tos
forwards void notifyLoad P((char *file));
forwards void notifyLoaded P((void));
forwards void notifyPredicate P((char *name, int arity));
static void
notifyLoad(file)
char *file;
{ printf("Loading %s ", file);
fflush(stdout);
}
static void
notifyLoaded()
{ printf("\r\033K");
}
static void
notifyPredicate(name, arity)
char *name;
int arity;
{ static char cur[] = "|/-\\";
static int n = 0;
printf("%c\b", cur[n++ & 0x3]);
}
#endif
#if unix || EMX
#define notifyLoad(file)
#define notifyLoaded()
#define notifyPredicate(name, arity)
#endif
static char *
getString(fd)
FILE *fd;
{ static char *tmp;
static char *tmpend;
static int tmpsize = 512;
char *s;
if ( tmp == NULL )
{ tmp = malloc(tmpsize);
tmpend = &tmp[tmpsize-1];
}
for( s = tmp; (*s = Getc(fd)) != EOS; s++ )
{ if ( s == tmpend )
{ tmp = realloc(tmp, tmpsize+512);
s = &tmp[tmpsize-1];
tmpsize += 512;
tmpend = &tmp[tmpsize-1];
}
if ( *s == EOF )
fatalError("Unexpected EOF on intermediate code file at offset %d",
ftell(fd));
}
return tmp;
}
static long
getNum(fd)
FILE *fd;
{ long first = Getc(fd);
int bytes, shift, b;
if ( (bytes = (int) ((first >> 6) & 0x3)) == 0 )
return (first << 26) >> 26; /* 99% of them: speed up a bit */
first &= 0x3f;
for( b = 0; b < bytes; b++ )
{ first <<= 8;
first |= Getc(fd) & 0xff;
}
shift = (3-bytes)*8 + 2;
return (first << shift) >> shift;
}
static real
getReal(fd)
FILE *fd;
{ real f;
char *s = (char *)&f;
int n;
for(n=0; n<sizeof(f); n++)
*s++ = Getc(fd);
return f;
}
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Load a complete `wic' file. `toplevel' tells us whether we are the
toplevel file opened, and thus should include other `wic' files or we
should ignore the include statements. `load_options' tells us to only
load the options of the toplevel file.
All wic files loaded are appended in the right order to a chain of
`states'. They are written to a new toplevel wic file by openWic().
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
bool
loadWicFile(file, toplevel, load_options)
char *file;
bool toplevel, load_options;
{ FILE *fd;
bool rval = TRUE;
if ((fd = Fopen(file, STREAM_OPEN_BIN_READ)) == (FILE *) NULL)
{ fatalError("Can't open %s: %s", file, OsError());
rval = FALSE;
goto out;
}
notifyLoad(file);
if (loadWicFd(file, fd, toplevel, load_options) == FALSE)
{ rval = FALSE;
goto out;
}
if (toplevel == TRUE && load_options == FALSE)
{ if (appendState(file) == FALSE)
{ rval = FALSE;
goto out;
}
}
out:
if (fd != (FILE *) NULL)
fclose(fd);
notifyLoaded();
return rval;
}
static bool
loadWicFd(file, fd, toplevel, load_options)
char *file;
FILE *fd;
bool toplevel, load_options;
{ char *s;
Char c;
int n;
#if OS2
for(n=0; n<5; n++) /* skip first five lines */
#else
for(n=0; n<2; n++) /* skip first two lines */
#endif
{ while( (c=(Char)Getc(fd)) != '\n' && c != EOF ) ;
if ( c == EOF )
return fatalError("%s is not a SWI-Prolog intermediate code file", file);
}
s = getString(fd);
if (!streq(s, saveMagic) )
return fatalError("%s is not a SWI-Prolog intermediate code file", file);
if (getNum(fd) != VERSION)
{ fatalError("Intermediate code file %s has incompatible save version",
file);
fail;
}
if (load_options && toplevel)
{ options.localSize = getNum(fd);
options.globalSize = getNum(fd);
options.trailSize = getNum(fd);
options.argumentSize = getNum(fd);
options.lockSize = getNum(fd);
DEBUG(2, printf("local=%ld, global=%ld, trail=%ld, argument=%ld\n",
options.localSize, options.globalSize,
options.trailSize, options.argumentSize));
options.goal = store_string(getString(fd) );
options.topLevel = store_string(getString(fd) );
options.initFile = store_string(getString(fd) );
succeed;
} else
{ int n;
for(n=0; n<5; n++) getNum(fd);
for(n=0; n<3; n++) getString(fd);
}
for(;;)
{ switch(c=Getc(fd) )
{ case EOF:
succeed;
case 'W':
{ char *name;
name = store_string(getString(fd) );
if (toplevel == TRUE)
{ appendState(name);
loadWicFile(name, FALSE, FALSE);
}
continue;
}
case 'P':
{ loadPredicate(fd);
continue;
}
case 'D':
{ word directive;
word rval;
s = getString(fd);
seeString(s);
setVar(directive);
rval = pl_read(&directive);
seenString();
if (rval == TRUE)
{ environment_frame = (LocalFrame) NULL;
if (callGoal(MODULE_user, directive, FALSE) == FALSE)
{ printf("[WARNING: directive failed: ");
pl_write(&directive);
printf("]\n");
}
}
continue;
}
case 'F':
{ currentSource = lookupSourceFile(lookupAtom(getString(fd) ));
currentSource->system = (Getc(fd) == 's' ? TRUE : FALSE);
currentSource->time = Getw(fd);
continue;
}
case 'M':
{ char *file;
modules.source = lookupModule(lookupAtom(getString(fd)));
file = getString(fd);
if (!streq(file, "-") )
modules.source->file = lookupSourceFile(lookupAtom(file));
continue;
}
case 'E':
{ loadExport(fd);
continue;
}
case 'I':
{ loadImport(fd);
continue;
}
default:
sysError("Illegal statement in wic file: %d", c);
}
}
}
static bool
loadPredicate(fd)
FILE *fd;
{ int arity;
int n;
char *name;
Procedure proc;
Definition def;
Clause clause;
Word xp;
Code bp;
arity = (int) getNum(fd);
if ((name = getString(fd)) == (char *) NULL)
sysError("bad string in wic file");
notifyPredicate(name, arity);
proc = lookupProcedure(lookupFunctorDef(lookupAtom(name), arity),
modules.source);
def = proc->definition;
def->source = currentSource;
if ( SYSTEM_MODE &&
false(def, DYNAMIC) &&
false(def, MULTIFILE) )
{ set(def, SYSTEM);
set(def, HIDE_CHILDS);
}
for(;;)
{ switch(Getc(fd) )
{ case 'X':
{ ulong pattern = Getw(fd);
if ( def->indexPattern != pattern )
{ def->indexPattern = pattern;
def->indexCardinality = cardinalityPattern(def->indexPattern);
if ( pattern != 0x1 )
#if O_AUTOINDEX
clear(def, AUTOINDEX);
#endif /* O_AUTOINDEX */
reindexProcedure(proc);
}
succeed;
}
case 'C':
clause = (Clause) allocHeap(sizeof(struct clause));
clause->next = (Clause) NULL;
clause->references = 0;
clearFlags(clause);
clause->variables = getNum(fd);
clause->slots = getNum(fd);
clause->subclauses = getNum(fd);
clause->procedure = proc;
clause->XR_size = getNum(fd);
statistics.externals += clause->XR_size;
if ( clause->XR_size > 0 )
{ clause->externals = (Word) allocHeap(clause->XR_size * sizeof(word));
xp = clause->externals;
for(n=0; n<clause->XR_size; n++, xp++)
{ char c;
switch( c=Getc(fd) )
{ case 'a':
*xp = (word)lookupAtom(getString(fd) );
continue;
#if O_STRING
case 's':
*xp = heapString(getString(fd));
continue;
#endif /* O_STRING */
case 'f':
arity = (int) getNum(fd);
name = getString(fd);
*xp = (word)lookupFunctorDef(lookupAtom(name), arity);
continue;
case 'p':
arity = (int) getNum(fd);
name = getString(fd);
*xp = (word)lookupProcedure(lookupFunctorDef(lookupAtom(name), arity),
modules.source);
continue;
case 'e':
{ Module module = lookupModule(lookupAtom(getString(fd) ));
arity = (int) getNum(fd);
name = getString(fd);
*xp = (word)lookupProcedure(lookupFunctorDef(lookupAtom(name), arity),
module);
continue;
}
case 'n':
*xp = Getw(fd);
continue;
case 'r':
*xp = heapReal(getReal(fd));
continue;
default:
sysError("%s (char. index 0%lo): illegal XR entry: %c",
procedureName(proc), ftell(fd), c);
}
}
} else
clause->externals = NULL;
clause->code_size = getNum(fd);
statistics.codes += clause->code_size;
clause->codes = (Code) allocHeap(clause->code_size * sizeof(code));
bp = clause->codes;
#if O_VMCODE_IS_ADDRESS
while( bp < &clause->codes[clause->code_size] )
{ code op = getNum(fd);
int n;
*bp++ = encode(op);
for(n = codeTable[op].arguments; n > 0; n--)
*bp++ = getNum(fd);
}
#else
for(n=0; n<clause->code_size; n++)
*bp++ = getNum(fd);
#endif
assertProcedure(proc, clause, 'z');
reindexClause(clause);
}
}
}
static bool
loadExport(fd)
FILE *fd;
{ int arity = (int) getNum(fd);
char *name = getString(fd);
FunctorDef functor = lookupFunctorDef(lookupAtom(name), arity);
Procedure proc = lookupProcedure(functor, modules.source);
addHTable(modules.source->public, functor, proc);
succeed;
}
static bool
loadImport(fd)
FILE *fd;
{ Module source = lookupModule(lookupAtom(getString(fd) ));
int arity = (int) getNum(fd);
char *name = getString(fd);
FunctorDef functor = lookupFunctorDef(lookupAtom(name), arity);
Procedure proc = lookupProcedure(functor, source);
Procedure old;
DEBUG(2, printf("loadImport(): %s/%d into %s\n", name, arity, stringAtom(modules.source->name)));
if ((old = isCurrentProcedure(functor, modules.source)) != (Procedure) NULL)
{ if ( old->definition == proc->definition )
succeed; /* already done this! */
if (!isDefinedProcedure(old) )
{ old->definition = proc->definition;
succeed;
}
return warning("Failed to import %s into %s",
procedureName(proc),
stringAtom(modules.source->name) );
}
addHTable(modules.source->procedures, functor, proc);
succeed;
}
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
The code below handles the creation of `wic' files. It offers a number
of predicates which enables us to write the compilation toplevel in
Prolog.
Note that we keep track of the `current procedure' to keep all clauses
of a predicate together.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
static void
putString(s, fd)
register char *s;
FILE *fd;
{ while(*s)
{ Putc(*s, fd);
s++;
}
Putc(EOS, fd);
}
static void
putAtom(a, fd)
Atom a;
FILE *fd;
{ putString(a->name, fd);
}
static void
putNum(n, fd)
long n;
FILE *fd;
{ long m = n > 0 ? n : n - 1;
if ( m < (1L << 5) )
{ Putc((char) (n & 0x3f), fd);
return;
}
if ( m < (1L << 13) )
{ Putc((char) (((n >> 8) & 0x3f) | (1 << 6)), fd);
Putc((char) (n & 0xff), fd);
return;
}
if ( m < (1L << 21) )
{ Putc((char) (((n >> 16) & 0x3f) | (2 << 6)), fd);
Putc((char) ((n >> 8) & 0xff), fd);
Putc((char) (n & 0xff), fd);
return;
}
if ( m < (1L << 29) )
{ Putc((char) (((n >> 24) & 0x3f) | (3 << 6)), fd);
Putc((char) ((n >> 16) & 0xff), fd);
Putc((char) ((n >> 8) & 0xff), fd);
Putc((char) (n & 0xff), fd);
return;
}
sysError("Argument to putNum() out of range: %ld", n);
}
static void
putReal(f, fd)
real f;
FILE *fd;
{ char *s = (char *)&f;
int n;
for(n=0; n < sizeof(f); n++)
Putc(*s++, fd);
}
static void
saveWicClause(clause, fd)
Clause clause;
FILE *fd;
{ Word xp;
word xr;
Code bp;
int n;
Putc('C', fd);
putNum(clause->variables, fd);
putNum(clause->slots, fd);
putNum(clause->subclauses, fd);
putNum(clause->XR_size, fd);
xp = clause->externals;
for(n=0; n<clause->XR_size; n++, xp++)
{ xr = *xp;
if (isAtom(xr) )
{ Putc('a', fd);
putAtom((Atom)xr, fd);
} else if (isInteger(xr) )
{ Putc('n', fd);
Putw(xr, fd);
} else if (isReal(xr) )
{ Putc('r', fd);
putReal(valReal(xr), fd);
#if O_STRING
} else if ( isString(xr) )
{ Putc('s', fd);
putString(valString(xr), fd);
#endif /* O_STRING */
} else if (((FunctorDef)xr)->type == FUNCTOR_TYPE)
{ Putc('f', fd);
putNum(((FunctorDef)xr)->arity, fd);
putAtom(((FunctorDef)xr)->name, fd);
} else
{ if (((Procedure)xr)->definition->module != modules.source)
{ Putc('e', fd);
putAtom(((Procedure)xr)->definition->module->name, fd);
} else
{ Putc('p', fd);
}
putNum(((Procedure)xr)->functor->arity, fd);
putAtom(((Procedure)xr)->functor->name, fd);
}
}
putNum(clause->code_size, fd);
bp = clause->codes;
#if O_VMCODE_IS_ADDRESS
while( bp < &clause->codes[clause->code_size] )
{ code op = decode(*bp++);
int n;
putNum(op, fd);
for(n = codeTable[op].arguments; n > 0; n--)
putNum(*bp++, fd);
}
#else
for(n=0; n<clause->code_size; n++, bp++)
putNum(*bp, fd);
#endif
}
/********************************
* COMPILATION *
*********************************/
static void
closeProcedureWic()
{ if (currentProc != (Procedure) NULL)
{ Putc('X', wicFd);
Putw(currentProc->definition->indexPattern, wicFd);
currentProc = (Procedure) NULL;
}
}
static void
checkSource(file)
Atom file;
{ SourceFile sf = lookupSourceFile(file);
if (sf != currentSource)
{ currentSource = sf;
Putc('F', wicFd);
putAtom(file, wicFd);
Putc(sf->system ? 's' : 'u', wicFd);
Putw(sf->time, wicFd);
}
}
static bool
openWic(file)
char *file;
{ char *exec;
wicFile = file;
DEBUG(1, printf("Open compiler output file %s\n", file));
if ( (wicFd = Fopen(file, STREAM_OPEN_BIN_WRITE)) == (FILE *)NULL )
return warning("Can't open %s: %s", file, OsError());
DEBUG(1, printf("Searching for executable\n"));
if ( loaderstatus.restored_state )
{ exec = stringAtom(loaderstatus.restored_state);
} else
{ TRY( getSymbols() );
exec = stringAtom(loaderstatus.orgsymbolfile);
}
DEBUG(1, printf("Executable = %s\n", exec));
if ( !(exec = OsPath(AbsoluteFile(PrologPath(exec)))) )
fail;
DEBUG(1, printf("Expanded executable = %s\n", exec));
/*fprintf(wicFd, "#!%s -x\n", exec);*/
#if OS2
fprintf(wicFd, "/* Compiled SWI-Prolog Program */\r\n'@ECHO OFF'\r\nparse source . . name\r\n\"%s -x \" name arg(1)\r\nexit\r\n", exec);
#else
fprintf(wicFd, "#!/bin/sh\nexec %s -x $0 $*\n", exec);
#endif /* OS2 */
DEBUG(2, printf("Magic ...\n"));
putString( saveMagic, wicFd);
DEBUG(2, printf("Numeric options ...\n"));
putNum( VERSION, wicFd);
putNum( options.localSize, wicFd);
putNum( options.globalSize, wicFd);
putNum( options.trailSize, wicFd);
putNum( options.argumentSize, wicFd);
putNum( options.lockSize, wicFd);
DEBUG(2, printf("String options ...\n"));
putString(options.goal, wicFd);
putString(options.topLevel, wicFd);
putString(options.initFile, wicFd);
DEBUG(2, printf("States ...\n"));
putStates(wicFd);
currentProc = (Procedure) NULL;
currentSource = (SourceFile) NULL;
DEBUG(2, printf("Header complete ...\n"));
succeed;
}
static bool
closeWic()
{ if (wicFd == (FILE *) NULL)
fail;
closeProcedureWic();
fclose(wicFd);
return MarkExecutable(wicFile);
}
static bool
addClauseWic(term, file)
Word term;
Atom file;
{ Clause clause;
if ((clause = assert_term(term, 'z', file)) != (Clause)NULL)
{ if (clause->procedure != currentProc)
{ closeProcedureWic();
checkSource(file);
currentProc = clause->procedure;
Putc('P', wicFd);
putNum(currentProc->functor->arity, wicFd);
putAtom(currentProc->functor->name, wicFd);
}
saveWicClause(clause, wicFd);
succeed;
}
fail;
}
static bool
addDirectiveWic(term)
word term;
{ char *s = (char *)lTop;
#if !O_DYNAMIC_STACKS
long n = (char *)lMax - (char *)lTop;
tellString(s, n-2);
#else
tellString(s, 1000000);
#endif
TRY(pl_writeq(&term) );
toldString();
strcat(s, ". ");
closeProcedureWic();
Putc('D', wicFd);
putString(s, wicFd);
succeed;
}
static bool
startModuleWic(name, file)
Atom name;
SourceFile file;
{ closeProcedureWic();
Putc('M', wicFd);
putAtom(name, wicFd);
if (file != (SourceFile) NULL)
putAtom(file->name, wicFd);
else
putString("-", wicFd);
succeed;
}
static bool
exportWic(name, arity)
Atom name;
int arity;
{ closeProcedureWic();
Putc('E', wicFd);
putNum(arity, wicFd);
putAtom(name, wicFd);
succeed;
}
static bool
importWic(module, name, arity)
Atom module, name;
int arity;
{ closeProcedureWic();
Putc('I', wicFd);
putAtom(module, wicFd);
putNum(arity, wicFd);
putAtom(name, wicFd);
succeed;
}
/********************************
* PROLOG SUPPORT *
*********************************/
word
pl_open_wic(name)
Word name;
{ if (!isAtom(*name) )
fail;
return openWic(stringAtom(*name));
}
word
pl_close_wic()
{ return closeWic();
}
word
pl_add_clause_wic(term, file)
Word term, file;
{ if (isVar(*term) || !isAtom(*file) )
return warning("$add_clause_wic/2: instantiation fault");
return addClauseWic(term, (Atom)*file);
}
word
pl_add_directive_wic(term)
Word term;
{ if (isVar(*term) )
return warning("$add_directive_wic/1: directive is a variable");
return addDirectiveWic(*term);
}
word
pl_start_module_wic(term, file)
Word term, file;
{ if (!isAtom(*term) || (!isAtom(*file) && !isInteger(*file)))
return warning("$start_module_wic/1: instantiation fault");
return startModuleWic((Atom)*term,
isInteger(*file) ? (SourceFile) NULL
: lookupSourceFile((Atom)*file));
}
word
pl_export_wic(name, arity)
Word name, arity;
{ if (!isAtom(*name) || !isInteger(*arity) )
return warning("$export_wic/2: instantiation fault");
return exportWic((Atom)*name, (int)valNum(*arity));
}
word
pl_import_wic(module, name, arity)
Word module, name, arity;
{ if (!isAtom(*module) || !isAtom(*name) || !isInteger(*arity) )
return warning("$import_wic/3: instantiation fault");
return importWic((Atom)*module, (Atom)*name, (int) valNum(*arity));
}
/********************************
* BOOTSTRAP COMPILATION *
*********************************/
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
The code below offers a restricted compilation toplevel used for the
bootstrap compilation (-b option). It handles most things the Prolog
defined compiler handles as well, except:
- Be carefull to define a predicate first before using it as a
directive
- It does not offer `consult', `ensure_loaded' or the list notation.
(there is no way to include other files).
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
/* Check if a clause is of the for ":- directive". If not return NULL,
otherwise return the argument.
** Wed Jun 8 16:12:39 1988 jan@swivax.UUCP (Jan Wielemaker) */
static word
directiveClause(clause, functor)
word clause;
char *functor;
{ if (!isTerm(clause) )
return (word) NULL;
if (functorTerm(clause)->arity == 1 &&
streq(functorTerm(clause)->name->name, functor) )
{ word d;
d = argTerm(clause, 0);
if (isVar(d) )
return (word) NULL;
if ( !isTerm(d) || functorTerm(d) != FUNCTOR_module2 )
{ word directive;
directive = globalFunctor(FUNCTOR_module2);
argTerm(directive, 0) = (word) modules.source->name;
argTerm(directive, 1) = d;
return directive;
}
return d;
} else
return (word) NULL;
}
/* Compile an entire file into intermediate code.
** Thu Apr 28 13:44:43 1988 jan@swivax.UUCP (Jan Wielemaker) */
static bool
compileFile(file)
char *file;
{ word term;
char *path;
word f;
word directive;
DEBUG(1, printf("Boot compilation of %s\n", file));
if ((path = AbsoluteFile(file)) == (char *) NULL)
fail;
DEBUG(2, printf("Expanded to %s\n", path));
f = (word) lookupAtom(path);
DEBUG(2, printf("Opening\n"));
if (pl_see(&f) == FALSE)
fail;
DEBUG(2, printf("pl_start_consult()\n"));
pl_start_consult(&f);
for(;;)
{ setVar(term);
DEBUG(2, printf("pl_read_clause() -> "));
if (pl_read_clause(&term) == FALSE)
continue;
DEBUG(2, pl_write(&term); pl_nl());
if (term == (word) ATOM_end_of_file)
break;
if ((directive = directiveClause(term, ":-")) != (word) NULL)
{ environment_frame = (LocalFrame) NULL;
DEBUG(1, Putf(":- "); pl_write(&directive); Putf(".\n") );
callGoal(MODULE_user, directive, FALSE);
addDirectiveWic(directive);
} else if ((directive = directiveClause(term, "$:-")) != (word) NULL)
{ environment_frame = (LocalFrame) NULL;
DEBUG(1, Putf("$:- "); pl_write(&directive); Putf(".\n") );
callGoal(MODULE_user, directive, FALSE);
} else
addClauseWic(&term, (Atom)f);
}
pl_seen();
succeed;
}
bool
compileFileList(out, argc, argv)
char *out;
int argc;
char **argv;
{ newOp("$:-", OP_FX, 1200);
TRY(openWic(out) );
for(;argc > 0; argc--, argv++)
{ if (streq(argv[0], "-c") )
break;
compileFile(argv[0]);
}
return closeWic();
}
/********************************
* STATE LISTS *
*********************************/
/* Add a new state to the chain of states this Prolog session is build
from. The file name is made absolute to avoid directory problems
with incremental loading.
*/
bool
appendState(name)
char *name;
{ State state, st;
char *absolute;
if ((absolute = AbsoluteFile(name)) == (char *) NULL)
return warning("invalid file specification: %s", name);
state = (State) allocHeap(sizeof(struct state) );
state->next = (State) NULL;
state->name = store_string(absolute);
if (stateList == (State) NULL)
{ stateList = state;
succeed;
}
for(st = stateList; st->next; st = st->next) ;
st->next = state;
succeed;
}
/* Add 'W' statements to the WIC file for each file in the state list.
*/
static bool
putStates(fd)
FILE *fd;
{ State st;
for(st = stateList; st; st = st->next)
{ Putc('W', fd);
putString(st->name, fd);
}
succeed;
}