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#if !COMPILER
/*
* File: imain.r
* Interpreter main program, argument handling, and such.
* Contents: main, iconx, ixopts, resolve
*/
#include "../h/version.h"
#include "../h/header.h"
#include "../h/opdefs.h"
static int iconx(int argc, char *argv[]);
static void ixopts(int argc, char *argv[], int *ip);
/*
* Initial interpreter entry point (for all remaining platforms).
*/
int main(int argc, char *argv[]) {
return iconx(argc, argv);
}
/*
* Initial icode sequence. This is used to invoke the main procedure
* with one argument. If main returns, the Op_Quit is executed.
*/
int iconx(int argc, char *argv[]) {
int i, slen;
static word istart[4];
static int mterm = Op_Quit;
#ifdef MultiThread
/*
* Look for MultiThread programming environment in which to execute
* this program, specified by MTENV environment variable.
*/
{
char *p;
char **new_argv;
int i, j = 1, k = 1;
if ((p = getenv("MTENV")) != NULL) {
for(i=0;p[i];i++)
if (p[i] == ' ')
j++;
new_argv = malloc((argc + j) * sizeof(char *));
new_argv[0] = argv[0];
for (i=0; p[i]; ) {
new_argv[k++] = p+i;
while (p[i] && (p[i] != ' '))
i++;
if (p[i] == ' ')
p[i++] = '\0';
}
for(i=1;i<argc;i++)
new_argv[k++] = argv[i];
argc += j;
argv = new_argv;
}
}
#endif /* MultiThread */
ipc.opnd = NULL;
#ifdef LoadFunc
/*
* Append to FPATH the bin directory from which iconx was executed.
*/
{
char *p, *q, buf[1000];
p = getenv("FPATH");
q = relfile(argv[0], "/..");
sprintf(buf, "FPATH=%s %s", (p ? p : "."), (q ? q : "."));
putenv(buf);
}
#endif /* LoadFunc */
/*
* Setup Icon interface. It's done this way to avoid duplication
* of code, since the same thing has to be done if calling Icon
* is enabled.
*/
ixopts(argc, argv, &i);
if (i < 0) {
argc++;
argv--;
i++;
}
while (i--) { /* skip option arguments */
argc--;
argv++;
}
if (argc <= 1)
error(NULL, "no icode file specified");
/*
* Call icon_init with the name of the icode file to execute. [[I?]]
*/
icon_init(argv[1], &argc, argv);
/*
* Point sp at word after b_coexpr block for &main, point ipc at initial
* icode segment, and clear the gfp.
*/
stackend = stack + mstksize/WordSize;
sp = stack + Wsizeof(struct b_coexpr);
ipc.opnd = istart;
*ipc.op++ = Op_Noop; /* aligns Invoke's operand */ /* [[I?]] */
*ipc.op++ = Op_Invoke; /* [[I?]] */
*ipc.opnd++ = 1;
*ipc.op = Op_Quit;
ipc.opnd = istart;
gfp = 0;
/*
* Set up expression frame marker to contain execution of the
* main procedure. If failure occurs in this context, control
* is transferred to mterm, the address of an Op_Quit.
*/
efp = (struct ef_marker *)(sp);
efp->ef_failure.op = &mterm;
efp->ef_gfp = 0;
efp->ef_efp = 0;
efp->ef_ilevel = 1;
sp += Wsizeof(*efp) - 1;
pfp = 0;
ilevel = 0;
/*
* We have already loaded the
* icode and initialized things, so it's time to just push main(),
* build an Icon list for the rest of the arguments, and called
* interp on a "invoke 1" bytecode.
*/
/*
* The first global variable holds the value of "main". If it
* is not of type procedure, this is noted as run-time error 117.
* Otherwise, this value is pushed on the stack.
*/
if (globals[0].dword != D_Proc)
fatalerr(117, NULL);
PushDesc(globals[0]);
PushNull;
glbl_argp = (dptr)(sp - 1);
/*
* If main() has a parameter, it is to be invoked with one argument, a list
* of the command line arguments. The command line arguments are pushed
* on the stack as a series of descriptors and Ollist is called to create
* the list. The null descriptor first pushed serves as Arg0 for
* Ollist and receives the result of the computation.
*/
if (((struct b_proc *)BlkLoc(globals[0]))->nparam > 0) {
for (i = 2; i < argc; i++) {
char *tmp;
slen = strlen(argv[i]);
PushVal(slen);
Protect(tmp=alcstr(argv[i],(word)slen), fatalerr(0,NULL));
PushAVal(tmp);
}
Ollist(argc - 2, glbl_argp);
}
sp = (word *)glbl_argp + 1;
glbl_argp = 0;
ixinited = 1; /* post fact that iconx is initialized */
/*
* Start things rolling by calling interp. This call to interp
* returns only if an Op_Quit is executed. If this happens,
* c_exit() is called to wrap things up.
*/
interp(0,(dptr)NULL);
c_exit(EXIT_SUCCESS);
return 0;
}
/*
* ixopts - handle interpreter command line options.
*/
void ixopts(argc,argv,ip)
int argc;
char **argv;
int *ip;
{
#ifdef TallyOpt
extern int tallyopt;
#endif /* TallyOpt */
*ip = 0; /* number of arguments processed */
#if MSWIN
/*
* if we didn't start with iconx.exe, backup one
* so that our icode filename is argv[1].
*/
{
char tmp[256], *t2, *basename, *ext;
int len = 0;
strcpy(tmp, argv[0]);
for (t2 = tmp; *t2; t2++) {
switch (*t2) {
case ':':
case '/':
case '\\':
basename = t2 + 1;
ext = NULL;
break;
case '.':
ext = t2;
break;
default:
*t2 = tolower(*t2);
break;
}
}
/* If present, cut the ".exe" extension. */
if (ext != NULL && !strcmp(ext, ".exe"))
*ext = 0;
/*
* if argv[0] is not a reference to our interpreter, take it as the
* name of the icode file, and back up for it.
*/
if (strcmp(basename, "iconx")) {
argv--;
argc++;
(*ip)--;
}
}
#endif /* MSWIN */
/*
* Handle command line options.
*/
while ( argv[1] != 0 && *argv[1] == '-' ) {
switch ( *(argv[1]+1) ) {
#ifdef TallyOpt
/*
* Set tallying flag if -T option given
*/
case 'T':
tallyopt = 1;
break;
#endif /* TallyOpt */
/*
* Announce version on stderr if -V is given.
*/
case 'V':
fprintf(stderr, "%s (%s)\n", Version, Config);
if (!argv[2])
exit(0);
break;
}
argc--;
(*ip)++;
argv++;
}
}
/*
* resolve - perform various fix-ups on the data read from the icode
* file.
*/
#ifdef MultiThread
void resolve(pstate)
struct progstate *pstate;
#else /* MultiThread */
void resolve()
#endif /* MultiThread */
{
register word i, j;
register struct b_proc *pp;
register dptr dp;
extern int Omkrec();
#ifdef MultiThread
register struct progstate *savedstate;
#endif /* MultiThread */
#ifdef MultiThread
savedstate = curpstate;
if (pstate) curpstate = pstate;
#endif /* MultiThread */
/*
* Relocate the names of the global variables.
*/
for (dp = gnames; dp < egnames; dp++)
StrLoc(*dp) = strcons + (uword)StrLoc(*dp);
/*
* Scan the global variable array for procedures and fill in appropriate
* addresses.
*/
for (j = 0; j < n_globals; j++) {
if (globals[j].dword != D_Proc)
continue;
/*
* The second word of the descriptor for procedure variables tells
* where the procedure is. Negative values are used for built-in
* procedures and positive values are used for Icon procedures.
*/
i = IntVal(globals[j]);
if (i < 0) {
/*
* globals[j] points to a built-in function; call (bi_)strprc
* to look it up by name in the interpreter's table of built-in
* functions.
*/
if((BlkLoc(globals[j])= (union block *)bi_strprc(gnames+j,0)) == NULL)
globals[j] = nulldesc; /* undefined, set to &null */
}
else {
/*
* globals[j] points to an Icon procedure or a record; i is an offset
* to location of the procedure block in the code section. Point
* pp at the block and replace BlkLoc(globals[j]).
*/
pp = (struct b_proc *)(code + i);
BlkLoc(globals[j]) = (union block *)pp;
/*
* Relocate the address of the name of the procedure.
*/
StrLoc(pp->pname) = strcons + (uword)StrLoc(pp->pname);
if (pp->ndynam == -2) {
/*
* This procedure is a record constructor. Make its entry point
* be the entry point of Omkrec().
*/
pp->entryp.ccode = Omkrec;
/*
* Initialize field names
*/
for (i = 0; i < pp->nfields; i++)
StrLoc(pp->lnames[i]) = strcons + (uword)StrLoc(pp->lnames[i]);
}
else {
/*
* This is an Icon procedure. Relocate the entry point and
* the names of the parameters, locals, and static variables.
*/
pp->entryp.icode = code + pp->entryp.ioff;
for (i = 0; i < abs((int)pp->nparam)+pp->ndynam+pp->nstatic; i++)
StrLoc(pp->lnames[i]) = strcons + (uword)StrLoc(pp->lnames[i]);
}
}
}
/*
* Relocate the names of the fields.
*/
for (dp = fnames; dp < efnames; dp++)
StrLoc(*dp) = strcons + (uword)StrLoc(*dp);
#ifdef MultiThread
curpstate = savedstate;
#endif /* MultiThread */
}
#endif /* !COMPILER */
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