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greg |
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/* Copyright (c) 1986 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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#endif |
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/* |
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* readobj.c - routines for reading in object descriptions. |
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* |
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* 7/28/85 |
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*/ |
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#include "standard.h" |
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#include "object.h" |
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#include "otypes.h" |
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#include <ctype.h> |
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OBJREC *objblock[MAXOBJBLK]; /* our objects */ |
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int nobjects = 0; /* # of objects */ |
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readobj(input) /* read in an object file or stream */ |
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char *input; |
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{ |
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FILE *popen(); |
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char *fgets(); |
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FILE *infp; |
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char buf[512]; |
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register int c; |
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if (input == NULL) { |
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infp = stdin; |
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input = "standard input"; |
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} else if (input[0] == '!') { |
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if ((infp = popen(input+1, "r")) == NULL) { |
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sprintf(errmsg, "cannot execute \"%s\"", input); |
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error(SYSTEM, errmsg); |
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} |
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} else if ((infp = fopen(input, "r")) == NULL) { |
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sprintf(errmsg, "cannot open scene file \"%s\"", input); |
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error(SYSTEM, errmsg); |
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} |
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while ((c = getc(infp)) != EOF) { |
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if (isspace(c)) |
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continue; |
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if (c == '#') { /* comment */ |
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fgets(buf, sizeof(buf), infp); |
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} else if (c == '!') { /* pipe */ |
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ungetc(c, infp); |
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fgets(buf, sizeof(buf), infp); |
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c = strlen(buf); |
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if (buf[c-1] == '\n') |
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buf[c-1] = '\0'; |
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readobj(buf); |
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} else { /* object */ |
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ungetc(c, infp); |
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getobject(input, infp); |
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} |
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} |
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if (input[0] == '!') |
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pclose(infp); |
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else |
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fclose(infp); |
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} |
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getobject(name, fp) /* read the next object */ |
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char *name; |
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FILE *fp; |
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{ |
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OBJECT obj; |
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char sbuf[MAXSTR]; |
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register OBJREC *objp; |
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if ((obj = newobject()) == OVOID) |
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error(SYSTEM, "out of object space"); |
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objp = objptr(obj); |
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/* get modifier */ |
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fscanf(fp, "%s", sbuf); |
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if (!strcmp(sbuf, VOIDID)) |
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objp->omod = OVOID; |
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else if ((objp->omod = modifier(sbuf)) == OVOID) { |
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sprintf(errmsg, "(%s): undefined modifier \"%s\"", name, sbuf); |
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error(USER, errmsg); |
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} |
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/* get type */ |
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fscanf(fp, "%s", sbuf); |
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if (!strcmp(sbuf, ALIASID)) |
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objp->otype = -1; |
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else if ((objp->otype = otype(sbuf)) < 0) { |
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sprintf(errmsg, "(%s): unknown type \"%s\"", name, sbuf); |
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error(USER, errmsg); |
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} |
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/* get identifier */ |
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fscanf(fp, "%s", sbuf); |
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objp->oname = savqstr(sbuf); |
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/* get arguments */ |
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if (objp->otype == -1) { |
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register OBJECT alias; |
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fscanf(fp, "%s", sbuf); |
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if ((alias = modifier(sbuf)) == OVOID) { |
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sprintf(errmsg, |
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"(%s): bad reference \"%s\" for %s \"%s\"", |
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name, sbuf, ALIASID, objp->oname); |
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error(USER, errmsg); |
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} |
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objp->otype = objptr(alias)->otype; |
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bcopy(&objptr(alias)->oargs, &objp->oargs, sizeof(FUNARGS)); |
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} else if (readfargs(&objp->oargs, fp) < 0) { |
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sprintf(errmsg, "(%s): bad arguments", name); |
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objerror(objp, USER, errmsg); |
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} |
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/* initialize */ |
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objp->os = NULL; |
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objp->lastrno = -1; |
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insertobject(obj); /* add to global structure */ |
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} |
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readfargs(fa, fp) /* read function arguments from stream */ |
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register FUNARGS *fa; |
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FILE *fp; |
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{ |
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char sbuf[MAXSTR]; |
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int n; |
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register int i; |
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if (fscanf(fp, "%d", &n) != 1 || n < 0) |
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return(-1); |
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if (fa->nsargs = n) { |
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fa->sarg = (char **)bmalloc(n*sizeof(char *)); |
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if (fa->sarg == NULL) |
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goto memerr; |
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for (i = 0; i < fa->nsargs; i++) { |
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if (fscanf(fp, "%s", sbuf) != 1) |
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return(-1); |
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fa->sarg[i] = savestr(sbuf); |
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} |
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} else |
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fa->sarg = NULL; |
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if (fscanf(fp, "%d", &n) != 1 || n < 0) |
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return(-1); |
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#ifdef IARGS |
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if (fa->niargs = n) { |
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fa->iarg = (long *)bmalloc(n*sizeof(int)); |
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if (fa->iarg == NULL) |
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goto memerr; |
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for (i = 0; i < n; i++) |
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if (fscanf(fp, "%ld", &fa->iarg[i]) != 1) |
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return(-1); |
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} else |
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fa->iarg = NULL; |
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#else |
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if (n != 0) |
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return(-1); |
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#endif |
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if (fscanf(fp, "%d", &n) != 1 || n < 0) |
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return(-1); |
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if (fa->nfargs = n) { |
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fa->farg = (double *)bmalloc(n*sizeof(double)); |
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if (fa->farg == NULL) |
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goto memerr; |
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for (i = 0; i < n; i++) |
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if (fscanf(fp, "%lf", &fa->farg[i]) != 1) |
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return(-1); |
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} else |
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fa->farg = NULL; |
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return(0); |
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memerr: |
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error(SYSTEM, "out of memory in readfargs"); |
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} |
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int |
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newobject() /* get a new object */ |
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{ |
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register int i; |
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if ((nobjects & 077) == 0) { /* new block */ |
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errno = 0; |
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i = nobjects >> 6; |
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if (i >= MAXOBJBLK) |
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return(OVOID); |
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objblock[i] = (OBJREC *)malloc(0100*sizeof(OBJREC)); |
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if (objblock[i] == NULL) |
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return(OVOID); |
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} |
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return(nobjects++); |
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} |
