src/common/readobj.c

#ifndef lint
static const char RCSid[] = "$Id: readobj.c,v 2.16 2003/06/30 14:59:11 schorsch 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  "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[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 */
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:	2.17
Committed:	Wed Oct 22 02:06:34 2003 UTC (22 years ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.16:	+2 -2 lines
Log Message:	Fewer complaints if "platform.h" precedes "standard.h"
#	User	Rev	Content
1	greg	1.1	#ifndef lint
2	greg	2.17	static const char RCSid[] = "$Id: readobj.c,v 2.16 2003/06/30 14:59:11 schorsch 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	greg	1.1	#include "standard.h"
18			#include "object.h"
19			#include "otypes.h"
20
21
22			OBJREC objblock[MAXOBJBLK]; / our objects */
23	greg	1.4	OBJECT nobjects = 0; /* # of objects */
24	greg	1.1
25
26	greg	2.8	void
27	greg	2.4	readobj(inpspec) /* read in an object file or stream */
28			char *inpspec;
29	greg	1.1	{
30	greg	2.4	OBJECT lastobj;
31	greg	1.1	FILE *infp;
32	greg	2.5	char buf[1024];
33	greg	1.1	register int c;
34
35	greg	2.4	lastobj = nobjects;
36			if (inpspec == NULL) {
37	greg	1.1	infp = stdin;
38	greg	2.4	inpspec = "standard input";
39			} else if (inpspec[0] == '!') {
40			if ((infp = popen(inpspec+1, "r")) == NULL) {
41			sprintf(errmsg, "cannot execute \"%s\"", inpspec);
42	greg	1.1	error(SYSTEM, errmsg);
43			}
44	greg	2.4	} else if ((infp = fopen(inpspec, "r")) == NULL) {
45			sprintf(errmsg, "cannot open scene file \"%s\"", inpspec);
46	greg	1.1	error(SYSTEM, errmsg);
47			}
48			while ((c = getc(infp)) != EOF) {
49			if (isspace(c))
50			continue;
51			if (c == '#') { /* comment */
52			fgets(buf, sizeof(buf), infp);
53	greg	1.2	} else if (c == '!') { /* command */
54	greg	1.1	ungetc(c, infp);
55	greg	1.2	fgetline(buf, sizeof(buf), infp);
56	greg	1.1	readobj(buf);
57			} else { /* object */
58			ungetc(c, infp);
59	greg	2.4	getobject(inpspec, infp);
60	greg	1.1	}
61			}
62	greg	2.4	if (inpspec[0] == '!')
63	greg	1.1	pclose(infp);
64			else
65			fclose(infp);
66	greg	2.4	if (nobjects == lastobj) {
67			sprintf(errmsg, "(%s): empty file", inpspec);
68			error(WARNING, errmsg);
69			}
70	greg	1.1	}
71
72
73	greg	2.8	void
74	greg	1.1	getobject(name, fp) /* read the next object */
75			char *name;
76			FILE *fp;
77			{
78	greg	2.11	#define OALIAS -2
79	greg	1.1	OBJECT obj;
80			char sbuf[MAXSTR];
81	greg	1.6	int rval;
82	greg	1.1	register OBJREC *objp;
83
84			if ((obj = newobject()) == OVOID)
85			error(SYSTEM, "out of object space");
86			objp = objptr(obj);
87			/* get modifier */
88	greg	1.7	strcpy(sbuf, "EOF");
89			fgetword(sbuf, MAXSTR, fp);
90	greg	1.1	if (!strcmp(sbuf, VOIDID))
91			objp->omod = OVOID;
92	greg	2.11	else if (!strcmp(sbuf, ALIASMOD))
93			objp->omod = OALIAS;
94	greg	1.1	else if ((objp->omod = modifier(sbuf)) == OVOID) {
95			sprintf(errmsg, "(%s): undefined modifier \"%s\"", name, sbuf);
96			error(USER, errmsg);
97			}
98			/* get type */
99	greg	1.7	strcpy(sbuf, "EOF");
100			fgetword(sbuf, MAXSTR, fp);
101	greg	2.11	if ((objp->otype = otype(sbuf)) < 0) {
102	greg	1.1	sprintf(errmsg, "(%s): unknown type \"%s\"", name, sbuf);
103			error(USER, errmsg);
104			}
105			/* get identifier */
106	greg	1.7	sbuf[0] = '\0';
107			fgetword(sbuf, MAXSTR, fp);
108	greg	1.1	objp->oname = savqstr(sbuf);
109			/* get arguments */
110	greg	2.11	if (objp->otype == MOD_ALIAS) {
111	greg	1.1	register OBJECT alias;
112	greg	1.7	strcpy(sbuf, "EOF");
113			fgetword(sbuf, MAXSTR, fp);
114	greg	1.1	if ((alias = modifier(sbuf)) == OVOID) {
115	greg	2.11	sprintf(errmsg, "(%s): bad reference \"%s\"",
116			name, sbuf);
117			objerror(objp, USER, errmsg);
118			}
119			if (objp->omod == OALIAS \|\|
120			objp->omod == objptr(alias)->omod) {
121			objp->omod = alias;
122			} else {
123			objp->oargs.sarg = (char *)malloc(sizeof(char ));
124			if (objp->oargs.sarg == NULL)
125			error(SYSTEM, "out of memory in getobject");
126			objp->oargs.nsargs = 1;
127			objp->oargs.sarg[0] = savestr(sbuf);
128	greg	1.1	}
129	greg	1.6	} else if ((rval = readfargs(&objp->oargs, fp)) == 0) {
130	greg	1.1	sprintf(errmsg, "(%s): bad arguments", name);
131			objerror(objp, USER, errmsg);
132	greg	1.6	} else if (rval < 0) {
133			sprintf(errmsg, "(%s): error reading scene", name);
134			error(SYSTEM, errmsg);
135	greg	1.1	}
136	greg	2.11	if (objp->omod == OALIAS) {
137			sprintf(errmsg, "(%s): inappropriate use of '%s' modifier",
138			name, ALIASMOD);
139			objerror(objp, USER, errmsg);
140			}
141	greg	1.1	/* initialize */
142			objp->os = NULL;
143
144			insertobject(obj); /* add to global structure */
145	greg	2.11	#undef OALIAS
146	greg	1.1	}
147
148
149	greg	2.10	OBJECT
150	greg	1.1	newobject() /* get a new object */
151			{
152			register int i;
153
154	gwlarson	2.7	if ((nobjects & (OBJBLKSIZ-1)) == 0) { /* new block */
155	greg	1.1	errno = 0;
156	gwlarson	2.7	i = nobjects >> OBJBLKSHFT;
157	greg	1.1	if (i >= MAXOBJBLK)
158			return(OVOID);
159	greg	2.8	objblock[i] = (OBJREC *)calloc(OBJBLKSIZ, sizeof(OBJREC));
160	greg	1.1	if (objblock[i] == NULL)
161			return(OVOID);
162			}
163			return(nobjects++);
164	greg	2.8	}
165
166			void
167			freeobjects(firstobj, nobjs) /* free a range of objects */
168	greg	2.15	int firstobj, nobjs;
169	greg	2.8	{
170			register int obj;
171			/* check bounds */
172			if (firstobj < 0)
173			return;
174			if (nobjs <= 0)
175			return;
176			if (firstobj + nobjs > nobjects)
177			return;
178			/* clear objects */
179			for (obj = firstobj+nobjs; obj-- > firstobj; ) {
180			register OBJREC *o = objptr(obj);
181			free_os(o); /* free client memory */
182			freeqstr(o->oname);
183			freefargs(&o->oargs);
184	schorsch	2.16	memset((void *)o, '\0', sizeof(OBJREC));
185	greg	2.8	}
186			clearobjndx();
187			/* free objects off end */
188			for (obj = nobjects; obj-- > 0; )
189			if (objptr(obj)->oname != NULL)
190			break;
191			++obj;
192			while (nobjects > obj) /* free empty end blocks */
193			if ((--nobjects & (OBJBLKSIZ-1)) == 0) {
194			int i = nobjects >> OBJBLKSHFT;
195			free((void *)objblock[i]);
196			objblock[i] = NULL;
197			}
198	greg	1.1	}