| 1 |
/* Copyright (c) 1986 Regents of the University of California */ |
| 2 |
|
| 3 |
#ifndef lint |
| 4 |
static char SCCSid[] = "$SunId$ LBL"; |
| 5 |
#endif |
| 6 |
|
| 7 |
/* |
| 8 |
* readobj.c - routines for reading in object descriptions. |
| 9 |
* |
| 10 |
* 7/28/85 |
| 11 |
*/ |
| 12 |
|
| 13 |
#include "standard.h" |
| 14 |
|
| 15 |
#include "object.h" |
| 16 |
|
| 17 |
#include "otypes.h" |
| 18 |
|
| 19 |
#include <ctype.h> |
| 20 |
|
| 21 |
OBJREC *objblock[MAXOBJBLK]; /* our objects */ |
| 22 |
int nobjects = 0; /* # of objects */ |
| 23 |
|
| 24 |
|
| 25 |
readobj(input) /* read in an object file or stream */ |
| 26 |
char *input; |
| 27 |
{ |
| 28 |
FILE *popen(); |
| 29 |
char *fgets(); |
| 30 |
FILE *infp; |
| 31 |
char buf[512]; |
| 32 |
register int c; |
| 33 |
|
| 34 |
if (input == NULL) { |
| 35 |
infp = stdin; |
| 36 |
input = "standard input"; |
| 37 |
} else if (input[0] == '!') { |
| 38 |
if ((infp = popen(input+1, "r")) == NULL) { |
| 39 |
sprintf(errmsg, "cannot execute \"%s\"", input); |
| 40 |
error(SYSTEM, errmsg); |
| 41 |
} |
| 42 |
} else if ((infp = fopen(input, "r")) == NULL) { |
| 43 |
sprintf(errmsg, "cannot open scene file \"%s\"", input); |
| 44 |
error(SYSTEM, errmsg); |
| 45 |
} |
| 46 |
while ((c = getc(infp)) != EOF) { |
| 47 |
if (isspace(c)) |
| 48 |
continue; |
| 49 |
if (c == '#') { /* comment */ |
| 50 |
fgets(buf, sizeof(buf), infp); |
| 51 |
} else if (c == '!') { /* pipe */ |
| 52 |
ungetc(c, infp); |
| 53 |
fgets(buf, sizeof(buf), infp); |
| 54 |
c = strlen(buf); |
| 55 |
if (buf[c-1] == '\n') |
| 56 |
buf[c-1] = '\0'; |
| 57 |
readobj(buf); |
| 58 |
} else { /* object */ |
| 59 |
ungetc(c, infp); |
| 60 |
getobject(input, infp); |
| 61 |
} |
| 62 |
} |
| 63 |
if (input[0] == '!') |
| 64 |
pclose(infp); |
| 65 |
else |
| 66 |
fclose(infp); |
| 67 |
} |
| 68 |
|
| 69 |
|
| 70 |
getobject(name, fp) /* read the next object */ |
| 71 |
char *name; |
| 72 |
FILE *fp; |
| 73 |
{ |
| 74 |
OBJECT obj; |
| 75 |
char sbuf[MAXSTR]; |
| 76 |
register OBJREC *objp; |
| 77 |
|
| 78 |
if ((obj = newobject()) == OVOID) |
| 79 |
error(SYSTEM, "out of object space"); |
| 80 |
objp = objptr(obj); |
| 81 |
/* get modifier */ |
| 82 |
fscanf(fp, "%s", sbuf); |
| 83 |
if (!strcmp(sbuf, VOIDID)) |
| 84 |
objp->omod = OVOID; |
| 85 |
else if ((objp->omod = modifier(sbuf)) == OVOID) { |
| 86 |
sprintf(errmsg, "(%s): undefined modifier \"%s\"", name, sbuf); |
| 87 |
error(USER, errmsg); |
| 88 |
} |
| 89 |
/* get type */ |
| 90 |
fscanf(fp, "%s", sbuf); |
| 91 |
if (!strcmp(sbuf, ALIASID)) |
| 92 |
objp->otype = -1; |
| 93 |
else if ((objp->otype = otype(sbuf)) < 0) { |
| 94 |
sprintf(errmsg, "(%s): unknown type \"%s\"", name, sbuf); |
| 95 |
error(USER, errmsg); |
| 96 |
} |
| 97 |
/* get identifier */ |
| 98 |
fscanf(fp, "%s", sbuf); |
| 99 |
objp->oname = savqstr(sbuf); |
| 100 |
/* get arguments */ |
| 101 |
if (objp->otype == -1) { |
| 102 |
register OBJECT alias; |
| 103 |
fscanf(fp, "%s", sbuf); |
| 104 |
if ((alias = modifier(sbuf)) == OVOID) { |
| 105 |
sprintf(errmsg, |
| 106 |
"(%s): bad reference \"%s\" for %s \"%s\"", |
| 107 |
name, sbuf, ALIASID, objp->oname); |
| 108 |
error(USER, errmsg); |
| 109 |
} |
| 110 |
objp->otype = objptr(alias)->otype; |
| 111 |
bcopy(&objptr(alias)->oargs, &objp->oargs, sizeof(FUNARGS)); |
| 112 |
} else if (readfargs(&objp->oargs, fp) < 0) { |
| 113 |
sprintf(errmsg, "(%s): bad arguments", name); |
| 114 |
objerror(objp, USER, errmsg); |
| 115 |
} |
| 116 |
/* initialize */ |
| 117 |
objp->os = NULL; |
| 118 |
objp->lastrno = -1; |
| 119 |
|
| 120 |
insertobject(obj); /* add to global structure */ |
| 121 |
} |
| 122 |
|
| 123 |
|
| 124 |
readfargs(fa, fp) /* read function arguments from stream */ |
| 125 |
register FUNARGS *fa; |
| 126 |
FILE *fp; |
| 127 |
{ |
| 128 |
char sbuf[MAXSTR]; |
| 129 |
int n; |
| 130 |
register int i; |
| 131 |
|
| 132 |
if (fscanf(fp, "%d", &n) != 1 || n < 0) |
| 133 |
return(-1); |
| 134 |
if (fa->nsargs = n) { |
| 135 |
fa->sarg = (char **)bmalloc(n*sizeof(char *)); |
| 136 |
if (fa->sarg == NULL) |
| 137 |
goto memerr; |
| 138 |
for (i = 0; i < fa->nsargs; i++) { |
| 139 |
if (fscanf(fp, "%s", sbuf) != 1) |
| 140 |
return(-1); |
| 141 |
fa->sarg[i] = savestr(sbuf); |
| 142 |
} |
| 143 |
} else |
| 144 |
fa->sarg = NULL; |
| 145 |
if (fscanf(fp, "%d", &n) != 1 || n < 0) |
| 146 |
return(-1); |
| 147 |
#ifdef IARGS |
| 148 |
if (fa->niargs = n) { |
| 149 |
fa->iarg = (long *)bmalloc(n*sizeof(int)); |
| 150 |
if (fa->iarg == NULL) |
| 151 |
goto memerr; |
| 152 |
for (i = 0; i < n; i++) |
| 153 |
if (fscanf(fp, "%ld", &fa->iarg[i]) != 1) |
| 154 |
return(-1); |
| 155 |
} else |
| 156 |
fa->iarg = NULL; |
| 157 |
#else |
| 158 |
if (n != 0) |
| 159 |
return(-1); |
| 160 |
#endif |
| 161 |
if (fscanf(fp, "%d", &n) != 1 || n < 0) |
| 162 |
return(-1); |
| 163 |
if (fa->nfargs = n) { |
| 164 |
fa->farg = (double *)bmalloc(n*sizeof(double)); |
| 165 |
if (fa->farg == NULL) |
| 166 |
goto memerr; |
| 167 |
for (i = 0; i < n; i++) |
| 168 |
if (fscanf(fp, "%lf", &fa->farg[i]) != 1) |
| 169 |
return(-1); |
| 170 |
} else |
| 171 |
fa->farg = NULL; |
| 172 |
return(0); |
| 173 |
memerr: |
| 174 |
error(SYSTEM, "out of memory in readfargs"); |
| 175 |
} |
| 176 |
|
| 177 |
|
| 178 |
int |
| 179 |
newobject() /* get a new object */ |
| 180 |
{ |
| 181 |
register int i; |
| 182 |
|
| 183 |
if ((nobjects & 077) == 0) { /* new block */ |
| 184 |
errno = 0; |
| 185 |
i = nobjects >> 6; |
| 186 |
if (i >= MAXOBJBLK) |
| 187 |
return(OVOID); |
| 188 |
objblock[i] = (OBJREC *)malloc(0100*sizeof(OBJREC)); |
| 189 |
if (objblock[i] == NULL) |
| 190 |
return(OVOID); |
| 191 |
} |
| 192 |
return(nobjects++); |
| 193 |
} |
