src/common/readobj.c

#ifndef lint
static const char RCSid[] = "$Id: readobj.c,v 2.19 2004/07/02 16:45:32 greg Exp $";
#endif
/*
 *  readobj.c - routines for reading in object descriptions.
 *
 *  External symbols declared in object.h
 */

#include "copyright.h"

#include  <ctype.h>
#include  <string.h>
#include  <stdio.h>

#include  "platform.h"
#include  "rtprocess.h"
#include  "standard.h"
#include  "object.h"
#include  "otypes.h"


OBJREC  *objblock[MAXOBJBLK];           /* our objects */
OBJECT  nobjects = 0;                   /* # of objects */


void
readobj(inpspec)                /* read in an object file or stream */
char  *inpspec;
{
        OBJECT  lastobj;
        FILE  *infp;
        char  buf[2048];
        register int  c;

        lastobj = nobjects;
        if (inpspec == NULL) {
                infp = stdin;
                inpspec = "standard input";
        } else if (inpspec[0] == '!') {
                if ((infp = popen(inpspec+1, "r")) == NULL) {
                        sprintf(errmsg, "cannot execute \"%s\"", inpspec);
                        error(SYSTEM, errmsg);
                }
        } else if ((infp = fopen(inpspec, "r")) == NULL) {
                sprintf(errmsg, "cannot open scene file \"%s\"", inpspec);
                error(SYSTEM, errmsg);
        }
        while ((c = getc(infp)) != EOF) {
                if (isspace(c))
                        continue;
                if (c == '#') {                         /* comment */
                        fgets(buf, sizeof(buf), infp);
                } else if (c == '!') {                  /* command */
                        ungetc(c, infp);
                        fgetline(buf, sizeof(buf), infp);
                        readobj(buf);
                } else {                                /* object */
                        ungetc(c, infp);
                        getobject(inpspec, infp);
                }
        }
        if (inpspec[0] == '!')
                pclose(infp);
        else
                fclose(infp);
        if (nobjects == lastobj) {
                sprintf(errmsg, "(%s): empty file", inpspec);
                error(WARNING, errmsg);
        }
}


void
getobject(name, fp)                     /* read the next object */
char  *name;
FILE  *fp;
{
#define OALIAS  -2
        OBJECT  obj;
        char  sbuf[MAXSTR];
        int  rval;
        register OBJREC  *objp;

        if ((obj = newobject()) == OVOID)
                error(SYSTEM, "out of object space");
        objp = objptr(obj);
                                        /* get modifier */
        strcpy(sbuf, "EOF");
        fgetword(sbuf, MAXSTR, fp);
        if (strchr(sbuf, '\t')) {
                sprintf(errmsg, "(%s): illegal tab in modifier \"%s\"",
                                        name, sbuf);
                error(USER, errmsg);
        }
        if (!strcmp(sbuf, VOIDID))
                objp->omod = OVOID;
        else if (!strcmp(sbuf, ALIASMOD))
                objp->omod = OALIAS;
        else if ((objp->omod = modifier(sbuf)) == OVOID) {
                sprintf(errmsg, "(%s): undefined modifier \"%s\"", name, sbuf);
                error(USER, errmsg);
        }
                                        /* get type */
        strcpy(sbuf, "EOF");
        fgetword(sbuf, MAXSTR, fp);
        if ((objp->otype = otype(sbuf)) < 0) {
                sprintf(errmsg, "(%s): unknown type \"%s\"", name, sbuf);
                error(USER, errmsg);
        }
                                        /* get identifier */
        sbuf[0] = '\0';
        fgetword(sbuf, MAXSTR, fp);
        if (strchr(sbuf, '\t')) {
                sprintf(errmsg, "(%s): illegal tab in identifier \"%s\"",
                                        name, sbuf);
                error(USER, errmsg);
        }
        objp->oname = savqstr(sbuf);
                                        /* get arguments */
        if (objp->otype == MOD_ALIAS) {
                register OBJECT  alias;
                strcpy(sbuf, "EOF");
                fgetword(sbuf, MAXSTR, fp);
                if ((alias = modifier(sbuf)) == OVOID) {
                        sprintf(errmsg, "(%s): bad reference \"%s\"",
                                        name, sbuf);
                        objerror(objp, USER, errmsg);
                }
                if (objp->omod == OALIAS || 
                                objp->omod == objptr(alias)->omod) {
                        objp->omod = alias;
                } else {
                        objp->oargs.sarg = (char **)malloc(sizeof(char *));
                        if (objp->oargs.sarg == NULL)
                                error(SYSTEM, "out of memory in getobject");
                        objp->oargs.nsargs = 1;
                        objp->oargs.sarg[0] = savestr(sbuf);
                }
        } else if ((rval = readfargs(&objp->oargs, fp)) == 0) {
                sprintf(errmsg, "(%s): bad arguments", name);
                objerror(objp, USER, errmsg);
        } else if (rval < 0) {
                sprintf(errmsg, "(%s): error reading scene", name);
                error(SYSTEM, errmsg);
        }
        if (objp->omod == OALIAS) {
                sprintf(errmsg, "(%s): inappropriate use of '%s' modifier",
                                name, ALIASMOD);
                objerror(objp, USER, errmsg);
        }
                                        /* initialize */
        objp->os = NULL;

        insertobject(obj);              /* add to global structure */
#undef OALIAS
}


OBJECT
newobject()                             /* get a new object */
{
        register int  i;

        if ((nobjects & (OBJBLKSIZ-1)) == 0) {  /* new block */
                errno = 0;
                i = nobjects >> OBJBLKSHFT;
                if (i >= MAXOBJBLK)
                        return(OVOID);
                objblock[i] = (OBJREC *)calloc(OBJBLKSIZ, sizeof(OBJREC));
                if (objblock[i] == NULL)
                        return(OVOID);
        }
        return(nobjects++);
}

void
freeobjects(firstobj, nobjs)            /* free a range of objects */
int  firstobj, nobjs;
{
        register int  obj;
                                        /* check bounds */
        if (firstobj < 0)
                return;
        if (nobjs <= 0)
                return;
        if (firstobj + nobjs > nobjects)
                return;
                                        /* clear objects */
        for (obj = firstobj+nobjs; obj-- > firstobj; ) {
                register OBJREC  *o = objptr(obj);
                free_os(o);             /* free client memory */
                freeqstr(o->oname);
                freefargs(&o->oargs);
                memset((void *)o, '\0', sizeof(OBJREC));
        }
        clearobjndx();
                                        /* free objects off end */
        for (obj = nobjects; obj-- > 0; )
                if (objptr(obj)->oname != NULL)
                        break;
        ++obj;
        while (nobjects > obj)          /* free empty end blocks */
                if ((--nobjects & (OBJBLKSIZ-1)) == 0) {
                        int     i = nobjects >> OBJBLKSHFT;
                        free((void *)objblock[i]);
                        objblock[i] = NULL;
                }
}
Revision:	2.20
Committed:	Tue Mar 30 12:42:33 2010 UTC (14 years, 1 month ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad4R2P2, rad5R0, rad4R2, rad4R1, rad4R2P1
Changes since 2.19:	+11 -1 lines
Log Message:	Added check against tab in modifier or identifier, which breaks rtrace
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	greg	2.20	static const char RCSid[] = "$Id: readobj.c,v 2.19 2004/07/02 16:45:32 greg Exp $";
3	greg	1.1	#endif
4			/*
5			* readobj.c - routines for reading in object descriptions.
6			*
7	greg	2.8	* External symbols declared in object.h
8			*/
9
10	greg	2.9	#include "copyright.h"
11	greg	1.1
12	schorsch	2.13	#include <ctype.h>
13	schorsch	2.16	#include <string.h>
14	schorsch	2.14	#include <stdio.h>
15	schorsch	2.13
16	greg	2.17	#include "platform.h"
17	schorsch	2.18	#include "rtprocess.h"
18	greg	1.1	#include "standard.h"
19			#include "object.h"
20			#include "otypes.h"
21
22
23			OBJREC objblock[MAXOBJBLK]; / our objects */
24	greg	1.4	OBJECT nobjects = 0; /* # of objects */
25	greg	1.1
26
27	greg	2.8	void
28	greg	2.4	readobj(inpspec) /* read in an object file or stream */
29			char *inpspec;
30	greg	1.1	{
31	greg	2.4	OBJECT lastobj;
32	greg	1.1	FILE *infp;
33	greg	2.19	char buf[2048];
34	greg	1.1	register int c;
35
36	greg	2.4	lastobj = nobjects;
37			if (inpspec == NULL) {
38	greg	1.1	infp = stdin;
39	greg	2.4	inpspec = "standard input";
40			} else if (inpspec[0] == '!') {
41			if ((infp = popen(inpspec+1, "r")) == NULL) {
42			sprintf(errmsg, "cannot execute \"%s\"", inpspec);
43	greg	1.1	error(SYSTEM, errmsg);
44			}
45	greg	2.4	} else if ((infp = fopen(inpspec, "r")) == NULL) {
46			sprintf(errmsg, "cannot open scene file \"%s\"", inpspec);
47	greg	1.1	error(SYSTEM, errmsg);
48			}
49			while ((c = getc(infp)) != EOF) {
50			if (isspace(c))
51			continue;
52			if (c == '#') { /* comment */
53			fgets(buf, sizeof(buf), infp);
54	greg	1.2	} else if (c == '!') { /* command */
55	greg	1.1	ungetc(c, infp);
56	greg	1.2	fgetline(buf, sizeof(buf), infp);
57	greg	1.1	readobj(buf);
58			} else { /* object */
59			ungetc(c, infp);
60	greg	2.4	getobject(inpspec, infp);
61	greg	1.1	}
62			}
63	greg	2.4	if (inpspec[0] == '!')
64	greg	1.1	pclose(infp);
65			else
66			fclose(infp);
67	greg	2.4	if (nobjects == lastobj) {
68			sprintf(errmsg, "(%s): empty file", inpspec);
69			error(WARNING, errmsg);
70			}
71	greg	1.1	}
72
73
74	greg	2.8	void
75	greg	1.1	getobject(name, fp) /* read the next object */
76			char *name;
77			FILE *fp;
78			{
79	greg	2.11	#define OALIAS -2
80	greg	1.1	OBJECT obj;
81			char sbuf[MAXSTR];
82	greg	1.6	int rval;
83	greg	1.1	register OBJREC *objp;
84
85			if ((obj = newobject()) == OVOID)
86			error(SYSTEM, "out of object space");
87			objp = objptr(obj);
88			/* get modifier */
89	greg	1.7	strcpy(sbuf, "EOF");
90			fgetword(sbuf, MAXSTR, fp);
91	greg	2.20	if (strchr(sbuf, '\t')) {
92			sprintf(errmsg, "(%s): illegal tab in modifier \"%s\"",
93			name, sbuf);
94			error(USER, errmsg);
95			}
96	greg	1.1	if (!strcmp(sbuf, VOIDID))
97			objp->omod = OVOID;
98	greg	2.11	else if (!strcmp(sbuf, ALIASMOD))
99			objp->omod = OALIAS;
100	greg	1.1	else if ((objp->omod = modifier(sbuf)) == OVOID) {
101			sprintf(errmsg, "(%s): undefined modifier \"%s\"", name, sbuf);
102			error(USER, errmsg);
103			}
104			/* get type */
105	greg	1.7	strcpy(sbuf, "EOF");
106			fgetword(sbuf, MAXSTR, fp);
107	greg	2.11	if ((objp->otype = otype(sbuf)) < 0) {
108	greg	1.1	sprintf(errmsg, "(%s): unknown type \"%s\"", name, sbuf);
109			error(USER, errmsg);
110			}
111			/* get identifier */
112	greg	1.7	sbuf[0] = '\0';
113			fgetword(sbuf, MAXSTR, fp);
114	greg	2.20	if (strchr(sbuf, '\t')) {
115			sprintf(errmsg, "(%s): illegal tab in identifier \"%s\"",
116			name, sbuf);
117			error(USER, errmsg);
118			}
119	greg	1.1	objp->oname = savqstr(sbuf);
120			/* get arguments */
121	greg	2.11	if (objp->otype == MOD_ALIAS) {
122	greg	1.1	register OBJECT alias;
123	greg	1.7	strcpy(sbuf, "EOF");
124			fgetword(sbuf, MAXSTR, fp);
125	greg	1.1	if ((alias = modifier(sbuf)) == OVOID) {
126	greg	2.11	sprintf(errmsg, "(%s): bad reference \"%s\"",
127			name, sbuf);
128			objerror(objp, USER, errmsg);
129			}
130			if (objp->omod == OALIAS \|\|
131			objp->omod == objptr(alias)->omod) {
132			objp->omod = alias;
133			} else {
134			objp->oargs.sarg = (char *)malloc(sizeof(char ));
135			if (objp->oargs.sarg == NULL)
136			error(SYSTEM, "out of memory in getobject");
137			objp->oargs.nsargs = 1;
138			objp->oargs.sarg[0] = savestr(sbuf);
139	greg	1.1	}
140	greg	1.6	} else if ((rval = readfargs(&objp->oargs, fp)) == 0) {
141	greg	1.1	sprintf(errmsg, "(%s): bad arguments", name);
142			objerror(objp, USER, errmsg);
143	greg	1.6	} else if (rval < 0) {
144			sprintf(errmsg, "(%s): error reading scene", name);
145			error(SYSTEM, errmsg);
146	greg	1.1	}
147	greg	2.11	if (objp->omod == OALIAS) {
148			sprintf(errmsg, "(%s): inappropriate use of '%s' modifier",
149			name, ALIASMOD);
150			objerror(objp, USER, errmsg);
151			}
152	greg	1.1	/* initialize */
153			objp->os = NULL;
154
155			insertobject(obj); /* add to global structure */
156	greg	2.11	#undef OALIAS
157	greg	1.1	}
158
159
160	greg	2.10	OBJECT
161	greg	1.1	newobject() /* get a new object */
162			{
163			register int i;
164
165	gwlarson	2.7	if ((nobjects & (OBJBLKSIZ-1)) == 0) { /* new block */
166	greg	1.1	errno = 0;
167	gwlarson	2.7	i = nobjects >> OBJBLKSHFT;
168	greg	1.1	if (i >= MAXOBJBLK)
169			return(OVOID);
170	greg	2.8	objblock[i] = (OBJREC *)calloc(OBJBLKSIZ, sizeof(OBJREC));
171	greg	1.1	if (objblock[i] == NULL)
172			return(OVOID);
173			}
174			return(nobjects++);
175	greg	2.8	}
176
177			void
178			freeobjects(firstobj, nobjs) /* free a range of objects */
179	greg	2.15	int firstobj, nobjs;
180	greg	2.8	{
181			register int obj;
182			/* check bounds */
183			if (firstobj < 0)
184			return;
185			if (nobjs <= 0)
186			return;
187			if (firstobj + nobjs > nobjects)
188			return;
189			/* clear objects */
190			for (obj = firstobj+nobjs; obj-- > firstobj; ) {
191			register OBJREC *o = objptr(obj);
192			free_os(o); /* free client memory */
193			freeqstr(o->oname);
194			freefargs(&o->oargs);
195	schorsch	2.16	memset((void *)o, '\0', sizeof(OBJREC));
196	greg	2.8	}
197			clearobjndx();
198			/* free objects off end */
199			for (obj = nobjects; obj-- > 0; )
200			if (objptr(obj)->oname != NULL)
201			break;
202			++obj;
203			while (nobjects > obj) /* free empty end blocks */
204			if ((--nobjects & (OBJBLKSIZ-1)) == 0) {
205			int i = nobjects >> OBJBLKSHFT;
206			free((void *)objblock[i]);
207			objblock[i] = NULL;
208			}
209	greg	1.1	}