--- ray/src/rt/rc2.c	2016/08/18 00:52:48	2.18
+++ ray/src/rt/rc2.c	2023/04/07 00:03:26	2.25
@@ -1,5 +1,5 @@
 #ifndef lint
-static const char RCSid[] = "$Id: rc2.c,v 2.18 2016/08/18 00:52:48 greg Exp $";
+static const char RCSid[] = "$Id: rc2.c,v 2.25 2023/04/07 00:03:26 greg Exp $";
 #endif
 /*
  * Accumulate ray contributions for a set of materials
@@ -116,6 +116,8 @@ printheader(FILE *fout, const char *info)
 	fputs("NCOMP=3\n", fout);		/* always RGB */
 	if (info != NULL)			/* add extra info if given */
 		fputs(info, fout);
+	if ((outfmt == 'f') | (outfmt == 'd'))
+		fputendian(fout);
 	fputformat(formstr(outfmt), fout);
 	fputc('\n', fout);			/* empty line ends header */
 }
@@ -141,11 +143,15 @@ getostream(const char *ospec, const char *mname, int b
 	LUENT			*lep;
 	STREAMOUT		*sop;
 	char			*cp;
-	
+
+	info[0] = '\0';
 	if (ospec == NULL) {			/* use stdout? */
 		if (!noopen & !using_stdout) {
 			if (outfmt != 'a')
 				SET_FILE_BINARY(stdout);
+#ifdef getc_unlocked
+			flockfile(stdout);	/* avoid lock/unlock overhead */
+#endif
 			if (header) {
 				cp = info;
 				if (yres > 0) {
@@ -162,9 +168,6 @@ getostream(const char *ospec, const char *mname, int b
 			if (waitflush > 0)
 				fflush(stdout);
 			stdos.xr = xres; stdos.yr = yres;
-#ifdef getc_unlocked
-			flockfile(stdout);	/* avoid lock/unlock overhead */
-#endif
 			using_stdout = 1;
 		}
 		stdos.ofp = stdout;
@@ -184,7 +187,7 @@ getostream(const char *ospec, const char *mname, int b
 		sop = (STREAMOUT *)malloc(sizeof(STREAMOUT));
 		if (sop == NULL)
 			error(SYSTEM, "out of memory in getostream");
-		sop->outpipe = oname[0] == '!';
+		sop->outpipe = (oname[0] == '!');
 		sop->reclen = 0;
 		sop->ofp = NULL;		/* open iff noopen==0 */
 		sop->xr = xres; sop->yr = yres;
@@ -194,6 +197,12 @@ getostream(const char *ospec, const char *mname, int b
 			errno = EEXIST;		/* file exists */
 			goto openerr;
 		}
+	} else if (noopen && outfmt == 'c' &&	/* stream exists to picture? */
+			(sop->xr > 0) & (sop->yr > 0)) {
+		if (ofl & OF_BIN)
+			return(NULL);		/* let caller offset bins */
+		sprintf(errmsg, "output '%s' not a valid picture", oname);
+		error(WARNING, errmsg);
 	}
 	if (!noopen && sop->ofp == NULL) {	/* open output stream */
 		if (oname[0] == '!')		/* output to command */
@@ -331,17 +340,17 @@ put_contrib(const DCOLOR cnt, FILE *fout)
 void
 mod_output(MODCONT *mp)
 {
-	STREAMOUT	*sop = getostream(mp->outspec, mp->modname, 0, 0);
+	STREAMOUT	*sop = getostream(mp->outspec, mp->modname, mp->bin0, 0);
 	int		j;
 
 	put_contrib(mp->cbin[0], sop->ofp);
 	if (mp->nbins > 3 &&	/* minor optimization */
-			sop == getostream(mp->outspec, mp->modname, 1, 0)) {
+			sop == getostream(mp->outspec, mp->modname, mp->bin0+1, 0)) {
 		for (j = 1; j < mp->nbins; j++)
 			put_contrib(mp->cbin[j], sop->ofp);
 	} else {
 		for (j = 1; j < mp->nbins; j++) {
-			sop = getostream(mp->outspec, mp->modname, j, 0);
+			sop = getostream(mp->outspec, mp->modname, mp->bin0+j, 0);
 			put_contrib(mp->cbin[j], sop->ofp);
 		}
 	}
@@ -439,7 +448,7 @@ reload_output()
 	char		*outvfmt;
 	LUENT		*oent;
 	int		xr, yr;
-	STREAMOUT	sout;
+	STREAMOUT	*sop;
 	DCOLOR		rgbv;
 
 	if (outfmt == 'a')
@@ -452,50 +461,43 @@ reload_output()
 			error(USER, "cannot reload from stdout");
 		if (mp->outspec[0] == '!')
 			error(USER, "cannot reload from command");
-		for (j = 0; ; j++) {		/* load each modifier bin */
-			ofl = ofname(oname, mp->outspec, mp->modname, j);
+		for (j = 0; j < mp->nbins; j++) { /* load each modifier bin */
+			ofl = ofname(oname, mp->outspec, mp->modname, mp->bin0+j);
 			if (ofl < 0)
 				error(USER, "bad output file specification");
 			oent = lu_find(&ofiletab, oname);
-			if (oent->data != NULL) {
-				sout = *(STREAMOUT *)oent->data;
-			} else {
-				sout.reclen = 0;
-				sout.outpipe = 0;
-				sout.xr = xres; sout.yr = yres;
-				sout.ofp = NULL;
-			}
-			if (sout.ofp == NULL) {	/* open output as input */
-				sout.ofp = fopen(oname, fmode);
-				if (sout.ofp == NULL) {
-					if (j == mp->nbins)
-						break;	/* assume end of modifier */
+			if (oent->data == NULL)
+				error(INTERNAL, "unallocated stream in reload_output()");
+			sop = (STREAMOUT *)oent->data;
+			if (sop->ofp == NULL) {	/* open output as input */
+				sop->ofp = fopen(oname, fmode);
+				if (sop->ofp == NULL) {
 					sprintf(errmsg, "missing reload file '%s'",
 							oname);
 					error(WARNING, errmsg);
 					break;
 				}
 #ifdef getc_unlocked
-				flockfile(sout.ofp);
+				flockfile(sop->ofp);
 #endif
-				if (header && checkheader(sout.ofp, outvfmt, NULL) != 1) {
+				if (header && checkheader(sop->ofp, outvfmt, NULL) != 1) {
 					sprintf(errmsg, "format mismatch for '%s'",
 							oname);
 					error(USER, errmsg);
 				}
-				if ((sout.reclen == 1) & (sout.xr > 0) & (sout.yr > 0) &&
-						(!fscnresolu(&xr, &yr, sout.ofp) ||
-							(xr != sout.xr) |
-							(yr != sout.yr))) {
+				if ((sop->reclen == 1) & (sop->xr > 0) & (sop->yr > 0) &&
+						(!fscnresolu(&xr, &yr, sop->ofp) ||
+							(xr != sop->xr) |
+							(yr != sop->yr))) {
 					sprintf(errmsg, "resolution mismatch for '%s'",
 							oname);
 					error(USER, errmsg);
 				}
 			}
 							/* read in RGB value */
-			if (!get_contrib(rgbv, sout.ofp)) {
+			if (!get_contrib(rgbv, sop->ofp)) {
 				if (!j) {
-					fclose(sout.ofp);
+					fclose(sop->ofp);
 					break;		/* ignore empty file */
 				}
 				if (j < mp->nbins) {
@@ -504,21 +506,8 @@ reload_output()
 					error(USER, errmsg);
 				}
 				break;
-			}
-			if (j >= mp->nbins) {		/* check modifier size */
-				sprintf(errmsg,
-				"mismatched -bn setting for reloading '%s'",
-						modname[i]);
-				error(USER, errmsg);
-			}
-				
+			}				
 			copycolor(mp->cbin[j], rgbv);
-			if (oent->key == NULL)		/* new file entry */
-				oent->key = strcpy((char *)
-						malloc(strlen(oname)+1), oname);
-			if (oent->data == NULL)
-				oent->data = (char *)malloc(sizeof(STREAMOUT));
-			*(STREAMOUT *)oent->data = sout;
 		}
 	}
 	lu_doall(&ofiletab, &myclose, NULL);	/* close all files */
@@ -533,7 +522,7 @@ myseeko(const LUENT *e, void *p)
 	off_t		nbytes = *(off_t *)p;
 	
 	if (sop->reclen > 1)
-		nbytes = nbytes * sop->reclen;
+		nbytes *= (off_t)sop->reclen;
 	if (fseeko(sop->ofp, nbytes, SEEK_CUR) < 0) {
 		sprintf(errmsg, "seek error on file '%s'", e->key);
 		error(SYSTEM, errmsg);
@@ -554,7 +543,7 @@ recover_output()
 	int		ofl;
 	char		oname[1024];
 	LUENT		*oent;
-	STREAMOUT	sout;
+	STREAMOUT	*sop;
 	off_t		nvals;
 	int		xr, yr;
 
@@ -583,88 +572,61 @@ recover_output()
 			error(USER, "cannot recover from stdout");
 		if (mp->outspec[0] == '!')
 			error(USER, "cannot recover from command");
-		for (j = 0; ; j++) {		/* check each bin's file */
-			ofl = ofname(oname, mp->outspec, mp->modname, j);
+		for (j = 0; j < mp->nbins; j++) { /* check each bin's file */
+			ofl = ofname(oname, mp->outspec, mp->modname, mp->bin0+j);
 			if (ofl < 0)
 				error(USER, "bad output file specification");
 			oent = lu_find(&ofiletab, oname);
-			if (oent->data != NULL) {
-				sout = *(STREAMOUT *)oent->data;
-			} else {
-				sout.reclen = 0;
-				sout.outpipe = 0;
-				sout.xr = xres;
-				sout.yr = yres;
-				sout.ofp = NULL;
-			}
-			if (sout.ofp != NULL) {	/* already open? */
+			if (oent->data == NULL)
+				error(INTERNAL, "unallocated stream in recover_output()");
+			sop = (STREAMOUT *)oent->data;
+			if (sop->ofp != NULL) {	/* already open? */
 				if (ofl & OF_BIN)
 					continue;
 				break;
 			}
 						/* open output */
-			sout.ofp = fopen(oname, "rb+");
-			if (sout.ofp == NULL) {
-				if (j == mp->nbins)
-					break;	/* assume end of modifier */
+			sop->ofp = fopen(oname, "rb+");
+			if (sop->ofp == NULL) {
 				sprintf(errmsg, "missing recover file '%s'",
 						oname);
 				error(WARNING, errmsg);
+				lastout = 0;
 				break;
 			}
-			nvals = lseek(fileno(sout.ofp), 0, SEEK_END);
+			nvals = lseek(fileno(sop->ofp), 0, SEEK_END);
 			if (nvals <= 0) {
 				lastout = 0;	/* empty output, quit here */
-				fclose(sout.ofp);
+				fclose(sop->ofp);
 				break;
 			}
-			if (!sout.reclen) {
-				if (!(ofl & OF_BIN)) {
-					sprintf(errmsg,
-						"need -bn to recover file '%s'",
-							oname);
-					error(USER, errmsg);
-				}
-				recsiz = outvsiz;
-			} else
-				recsiz = outvsiz * sout.reclen;
+			recsiz = outvsiz * sop->reclen;
 
-			lseek(fileno(sout.ofp), 0, SEEK_SET);
-			if (header && checkheader(sout.ofp, outvfmt, NULL) != 1) {
+			lseek(fileno(sop->ofp), 0, SEEK_SET);
+			if (header && checkheader(sop->ofp, outvfmt, NULL) != 1) {
 				sprintf(errmsg, "format mismatch for '%s'",
 						oname);
 				error(USER, errmsg);
 			}
-			if ((sout.reclen == 1) & (sout.xr > 0) & (sout.yr > 0) &&
-					(!fscnresolu(&xr, &yr, sout.ofp) ||
-						(xr != sout.xr) |
-						(yr != sout.yr))) {
+			if ((sop->reclen == 1) & (sop->xr > 0) & (sop->yr > 0) &&
+					(!fscnresolu(&xr, &yr, sop->ofp) ||
+						(xr != sop->xr) |
+						(yr != sop->yr))) {
 				sprintf(errmsg, "resolution mismatch for '%s'",
 						oname);
 				error(USER, errmsg);
 			}
-			nvals = (nvals - (off_t)ftell(sout.ofp)) / recsiz;
+			nvals = (nvals - (off_t)ftell(sop->ofp)) / recsiz;
 			if ((lastout < 0) | (nvals < lastout))
 				lastout = nvals;
-			if (oent->key == NULL)	/* new entry */
-				oent->key = strcpy((char *)
-						malloc(strlen(oname)+1), oname);
-			if (oent->data == NULL)
-				oent->data = (char *)malloc(sizeof(STREAMOUT));
-			*(STREAMOUT *)oent->data = sout;
 			if (!(ofl & OF_BIN))
 				break;		/* no bin separation */
 		}
 		if (!lastout) {			/* empty output */
 			error(WARNING, "no previous data to recover");
-			lu_done(&ofiletab);	/* reclose all outputs */
+						/* reclose all outputs */
+			lu_doall(&ofiletab, &myclose, NULL);
 			return;
-		}
-		if (j > mp->nbins) {		/* check modifier size */
-			sprintf(errmsg,
-				"mismatched -bn setting for recovering '%s'",
-					modname[i]);
-			error(USER, errmsg);
 		}
 	}
 	if (lastout < 0) {