src/common/readobj.c

#ifndef lint
static const char RCSid[] = "$Id$";
#endif
/*
 *  readobj.c - routines for reading in object descriptions.
 *
 *  External symbols declared in object.h
 */

#include "copyright.h"

#include  "standard.h"

#include  "object.h"

#include  "otypes.h"

#include  <ctype.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[1024];
        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 (!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);
        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 */
OBJECT  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);
                bzero((void *)o, 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:	2.12
Committed:	Tue May 13 17:58:32 2003 UTC (20 years, 11 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.11:	+1 -1 lines
Log Message:	Changed (char ) casts for memory copies to (void ) and other fixes
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	greg	2.10	static const char RCSid[] = "$Id$";
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			#include "standard.h"
13
14			#include "object.h"
15
16			#include "otypes.h"
17
18			#include <ctype.h>
19
20			OBJREC objblock[MAXOBJBLK]; / our objects */
21	greg	1.4	OBJECT nobjects = 0; /* # of objects */
22	greg	1.1
23
24	greg	2.8	void
25	greg	2.4	readobj(inpspec) /* read in an object file or stream */
26			char *inpspec;
27	greg	1.1	{
28	greg	2.4	OBJECT lastobj;
29	greg	1.1	FILE *infp;
30	greg	2.5	char buf[1024];
31	greg	1.1	register int c;
32
33	greg	2.4	lastobj = nobjects;
34			if (inpspec == NULL) {
35	greg	1.1	infp = stdin;
36	greg	2.4	inpspec = "standard input";
37			} else if (inpspec[0] == '!') {
38			if ((infp = popen(inpspec+1, "r")) == NULL) {
39			sprintf(errmsg, "cannot execute \"%s\"", inpspec);
40	greg	1.1	error(SYSTEM, errmsg);
41			}
42	greg	2.4	} else if ((infp = fopen(inpspec, "r")) == NULL) {
43			sprintf(errmsg, "cannot open scene file \"%s\"", inpspec);
44	greg	1.1	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	greg	1.2	} else if (c == '!') { /* command */
52	greg	1.1	ungetc(c, infp);
53	greg	1.2	fgetline(buf, sizeof(buf), infp);
54	greg	1.1	readobj(buf);
55			} else { /* object */
56			ungetc(c, infp);
57	greg	2.4	getobject(inpspec, infp);
58	greg	1.1	}
59			}
60	greg	2.4	if (inpspec[0] == '!')
61	greg	1.1	pclose(infp);
62			else
63			fclose(infp);
64	greg	2.4	if (nobjects == lastobj) {
65			sprintf(errmsg, "(%s): empty file", inpspec);
66			error(WARNING, errmsg);
67			}
68	greg	1.1	}
69
70
71	greg	2.8	void
72	greg	1.1	getobject(name, fp) /* read the next object */
73			char *name;
74			FILE *fp;
75			{
76	greg	2.11	#define OALIAS -2
77	greg	1.1	OBJECT obj;
78			char sbuf[MAXSTR];
79	greg	1.6	int rval;
80	greg	1.1	register OBJREC *objp;
81
82			if ((obj = newobject()) == OVOID)
83			error(SYSTEM, "out of object space");
84			objp = objptr(obj);
85			/* get modifier */
86	greg	1.7	strcpy(sbuf, "EOF");
87			fgetword(sbuf, MAXSTR, fp);
88	greg	1.1	if (!strcmp(sbuf, VOIDID))
89			objp->omod = OVOID;
90	greg	2.11	else if (!strcmp(sbuf, ALIASMOD))
91			objp->omod = OALIAS;
92	greg	1.1	else if ((objp->omod = modifier(sbuf)) == OVOID) {
93			sprintf(errmsg, "(%s): undefined modifier \"%s\"", name, sbuf);
94			error(USER, errmsg);
95			}
96			/* get type */
97	greg	1.7	strcpy(sbuf, "EOF");
98			fgetword(sbuf, MAXSTR, fp);
99	greg	2.11	if ((objp->otype = otype(sbuf)) < 0) {
100	greg	1.1	sprintf(errmsg, "(%s): unknown type \"%s\"", name, sbuf);
101			error(USER, errmsg);
102			}
103			/* get identifier */
104	greg	1.7	sbuf[0] = '\0';
105			fgetword(sbuf, MAXSTR, fp);
106	greg	1.1	objp->oname = savqstr(sbuf);
107			/* get arguments */
108	greg	2.11	if (objp->otype == MOD_ALIAS) {
109	greg	1.1	register OBJECT alias;
110	greg	1.7	strcpy(sbuf, "EOF");
111			fgetword(sbuf, MAXSTR, fp);
112	greg	1.1	if ((alias = modifier(sbuf)) == OVOID) {
113	greg	2.11	sprintf(errmsg, "(%s): bad reference \"%s\"",
114			name, sbuf);
115			objerror(objp, USER, errmsg);
116			}
117			if (objp->omod == OALIAS \|\|
118			objp->omod == objptr(alias)->omod) {
119			objp->omod = alias;
120			} else {
121			objp->oargs.sarg = (char *)malloc(sizeof(char ));
122			if (objp->oargs.sarg == NULL)
123			error(SYSTEM, "out of memory in getobject");
124			objp->oargs.nsargs = 1;
125			objp->oargs.sarg[0] = savestr(sbuf);
126	greg	1.1	}
127	greg	1.6	} else if ((rval = readfargs(&objp->oargs, fp)) == 0) {
128	greg	1.1	sprintf(errmsg, "(%s): bad arguments", name);
129			objerror(objp, USER, errmsg);
130	greg	1.6	} else if (rval < 0) {
131			sprintf(errmsg, "(%s): error reading scene", name);
132			error(SYSTEM, errmsg);
133	greg	1.1	}
134	greg	2.11	if (objp->omod == OALIAS) {
135			sprintf(errmsg, "(%s): inappropriate use of '%s' modifier",
136			name, ALIASMOD);
137			objerror(objp, USER, errmsg);
138			}
139	greg	1.1	/* initialize */
140			objp->os = NULL;
141
142			insertobject(obj); /* add to global structure */
143	greg	2.11	#undef OALIAS
144	greg	1.1	}
145
146
147	greg	2.10	OBJECT
148	greg	1.1	newobject() /* get a new object */
149			{
150			register int i;
151
152	gwlarson	2.7	if ((nobjects & (OBJBLKSIZ-1)) == 0) { /* new block */
153	greg	1.1	errno = 0;
154	gwlarson	2.7	i = nobjects >> OBJBLKSHFT;
155	greg	1.1	if (i >= MAXOBJBLK)
156			return(OVOID);
157	greg	2.8	objblock[i] = (OBJREC *)calloc(OBJBLKSIZ, sizeof(OBJREC));
158	greg	1.1	if (objblock[i] == NULL)
159			return(OVOID);
160			}
161			return(nobjects++);
162	greg	2.8	}
163
164			void
165			freeobjects(firstobj, nobjs) /* free a range of objects */
166			OBJECT firstobj, nobjs;
167			{
168			register int obj;
169			/* check bounds */
170			if (firstobj < 0)
171			return;
172			if (nobjs <= 0)
173			return;
174			if (firstobj + nobjs > nobjects)
175			return;
176			/* clear objects */
177			for (obj = firstobj+nobjs; obj-- > firstobj; ) {
178			register OBJREC *o = objptr(obj);
179			free_os(o); /* free client memory */
180			freeqstr(o->oname);
181			freefargs(&o->oargs);
182	greg	2.12	bzero((void *)o, sizeof(OBJREC));
183	greg	2.8	}
184			clearobjndx();
185			/* free objects off end */
186			for (obj = nobjects; obj-- > 0; )
187			if (objptr(obj)->oname != NULL)
188			break;
189			++obj;
190			while (nobjects > obj) /* free empty end blocks */
191			if ((--nobjects & (OBJBLKSIZ-1)) == 0) {
192			int i = nobjects >> OBJBLKSHFT;
193			free((void *)objblock[i]);
194			objblock[i] = NULL;
195			}
196	greg	1.1	}