1 #include	<stdio.h>
2 #include	<signal.h>
3 #include	<stdlib.h>
4 #include	<string.h>
5 #include	"pic.h"
6 #include	"y.tab.h"
7 
8 char	*version = "version July 5, 1993";
9 
10 obj	**objlist = 0;		/* store the elements here */
11 int	nobjlist = 0;		/* size of objlist array */
12 int	nobj	= 0;
13 
14 Attr	*attr;	/* attributes stored here as collected */
15 int	nattrlist = 0;
16 int	nattr	= 0;	/* number of entries in attr_list */
17 
18 Text	*text	= 0;	/* text strings stored here as collected */
19 int	ntextlist = 0;		/* size of text[] array */
20 int	ntext	= 0;
21 int	ntext1	= 0;	/* record ntext here on entry to each figure */
22 
23 double	curx	= 0;
24 double	cury	= 0;
25 
26 int	hvmode	= R_DIR;	/* R => join left to right, D => top to bottom, etc. */
27 
28 int	codegen	= 0;	/* 1=>output for this picture; 0=>no output */
29 char	*PEstring;	/* "PS" or "PE" picked up by lexer */
30 
31 double	deltx	= 6;	/* max x value in output, for scaling */
32 double	delty	= 6;	/* max y value in output, for scaling */
33 int	dbg	= 0;
34 int	lineno	= 0;
35 char	*filename	= "-";
36 int	synerr	= 0;
37 int	anyerr	= 0;	/* becomes 1 if synerr ever 1 */
38 char	*cmdname;
39 
40 double	xmin	= 30000;	/* min values found in actual data */
41 double	ymin	= 30000;
42 double	xmax	= -30000;	/* max */
43 double	ymax	= -30000;
44 
45 void	fpecatch(int);
46 void	getdata(void), setdefaults(void);
47 void	setfval(char *, double);
48 int	getpid(void);
49 
50 int
51 main(int argc, char *argv[])
52 {
53 	char buf[20];
54 
55 	signal(SIGFPE, fpecatch);
56 	cmdname = argv[0];
57 	while (argc > 1 && *argv[1] == '-') {
58 		switch (argv[1][1]) {
59 		case 'd':
60 			dbg = atoi(&argv[1][2]);
61 			if (dbg == 0)
62 				dbg = 1;
63 			fprintf(stderr, "%s\n", version);
64 			break;
65 		case 'V':
66 			fprintf(stderr, "%s\n", version);
67 			return 0;
68 		}
69 		argc--;
70 		argv++;
71 	}
72 	setdefaults();
73 	objlist = (obj **) grow((char *)objlist, "objlist", nobjlist += 1000, sizeof(obj *));
74 	text = (Text *) grow((char *)text, "text", ntextlist += 1000, sizeof(Text));
75 	attr = (Attr *) grow((char *)attr, "attr", nattrlist += 100, sizeof(Attr));
76 
77 	sprintf(buf, "/%d/", getpid());
78 	pushsrc(String, buf);
79 	definition("pid");
80 
81 	curfile = infile;
82 	pushsrc(File, curfile->fname);
83 	if (argc <= 1) {
84 		curfile->fin = stdin;
85 		curfile->fname = tostring("-");
86 		getdata();
87 	} else
88 		while (argc-- > 1) {
89 			if ((curfile->fin = fopen(*++argv, "r")) == NULL) {
90 				fprintf(stderr, "%s: can't open %s\n", cmdname, *argv);
91 				exit(1);
92 			}
93 			curfile->fname = tostring(*argv);
94 			getdata();
95 			fclose(curfile->fin);
96 			free(curfile->fname);
97 		}
98 	return anyerr;
99 }
100 
101 void fpecatch(int n)
102 {
103 	ERROR "floating point exception %d", n FATAL;
104 }
105 
106 char *grow(char *ptr, char *name, int num, int size)	/* make array bigger */
107 {
108 	char *p;
109 
110 	if (ptr == NULL)
111 		p = malloc(num * size);
112 	else
113 		p = realloc(ptr, num * size);
114 	if (p == NULL)
115 		ERROR "can't grow %s to %d", name, num * size FATAL;
116 	return p;
117 }
118 
119 static struct {
120 	char *name;
121 	double val;
122 	short scalable;		/* 1 => adjust when "scale" changes */
123 } defaults[] ={
124 	{ "scale", SCALE, 1, },
125 	{ "lineht", HT, 1, },
126 	{ "linewid", HT, 1, },
127 	{ "moveht", HT, 1, },
128 	{ "movewid", HT, 1, },
129 	{ "dashwid", HT10, 1, },
130 	{ "boxht", HT, 1, },
131 	{ "boxwid", WID, 1, },
132 	{ "circlerad", HT2, 1, },
133 	{ "arcrad", HT2, 1, },
134 	{ "ellipseht", HT, 1, },
135 	{ "ellipsewid", WID, 1, },
136 	{ "arrowht", HT5, 1, },
137 	{ "arrowwid", HT10, 1, },
138 	{ "arrowhead", 2, 0, },		/* arrowhead style */
139 	{ "textht", 0.0, 1, },		/* 6 lines/inch is also a useful value */
140 	{ "textwid", 0.0, 1, },
141 	{ "maxpsht", MAXHT, 0, },
142 	{ "maxpswid", MAXWID, 0, },
143 	{ "fillval", 0.7, 0, },		/* gray value for filling boxes */
144 	{ NULL, 0, 0 }
145 };
146 
147 void setdefaults(void)	/* set default sizes for variables like boxht */
148 {
149 	int i;
150 	YYSTYPE v;
151 
152 	for (i = 0; defaults[i].name != NULL; i++) {
153 		v.f = defaults[i].val;
154 		makevar(tostring(defaults[i].name), VARNAME, v);
155 	}
156 }
157 
158 void resetvar(void)	/* reset variables listed */
159 {
160 	int i, j;
161 
162 	if (nattr == 0) {	/* none listed, so do all */
163 		setdefaults();
164 		return;
165 	}
166 	for (i = 0; i < nattr; i++) {
167 		for (j = 0; defaults[j].name != NULL; j++)
168 			if (strcmp(defaults[j].name, attr[i].a_val.p) == 0) {
169 				setfval(defaults[j].name, defaults[j].val);
170 				free(attr[i].a_val.p);
171 				break;
172 			}
173 	}
174 }
175 
176 void checkscale(char *s)	/* if s is "scale", adjust default variables */
177 {
178 	int i;
179 	double scale;
180 
181 	if (strcmp(s, "scale") == 0) {
182 		scale = getfval("scale");
183 		for (i = 1; defaults[i].name != NULL; i++)
184 			if (defaults[i].scalable)
185 				setfval(defaults[i].name, defaults[i].val * scale);
186 	}
187 }
188 
189 void getdata(void)
190 {
191 	char *p, buf[1000], buf1[100];
192 	int ln;
193 	void reset(void), openpl(char *), closepl(char *), print(void);
194 	int yyparse(void);
195 
196 	curfile->lineno = 0;
197 	printlf(1, curfile->fname);
198 	while (fgets(buf, sizeof buf, curfile->fin) != NULL) {
199 		curfile->lineno++;
200 		if (*buf == '.' && *(buf+1) == 'P' && *(buf+2) == 'S') {
201 			for (p = &buf[3]; *p == ' '; p++)
202 				;
203 			if (*p++ == '<') {
204 				Infile svfile;
205 				svfile = *curfile;
206 				sscanf(p, "%s", buf1);
207 				if ((curfile->fin=fopen(buf1, "r")) == NULL)
208 					ERROR "can't open %s", buf1 FATAL;
209 				curfile->fname = tostring(buf1);
210 				getdata();
211 				fclose(curfile->fin);
212 				free(curfile->fname);
213 				*curfile = svfile;
214 				printlf(curfile->lineno, curfile->fname);
215 				continue;
216 			}
217 			reset();
218 			yyparse();
219 			anyerr += synerr;
220 			deltx = (xmax - xmin) / getfval("scale");
221 			delty = (ymax - ymin) / getfval("scale");
222 			if (buf[3] == ' ') {	/* next things are wid & ht */
223 				if (sscanf(&buf[4],"%lf %lf", &deltx, &delty) < 2)
224 					delty = deltx * (ymax-ymin) / (xmax-xmin);
225 				/* else {
226 				/*	double xfac, yfac; */
227 				/*	xfac = deltx / (xmax-xmin);
228 				/*	yfac = delty / (ymax-ymin);
229 				/*	if (xfac <= yfac)
230 				/*		delty = xfac * (ymax-ymin);
231 				/*	else
232 				/*		deltx = yfac * (xmax-xmin);
233 				/*}
234 				*/
235 			}
236 			dprintf("deltx = %g, delty = %g\n", deltx, delty);
237 			if (codegen && !synerr) {
238 				openpl(&buf[3]);	/* puts out .PS, with ht & wid stuck in */
239 				printlf(curfile->lineno+1, NULL);
240 				print();	/* assumes \n at end */
241 				closepl(PEstring);	/* does the .PE/F */
242 				free(PEstring);
243 			}
244 			printlf(curfile->lineno+1, NULL);
245 			fflush(stdout);
246 		} else if (buf[0] == '.' && buf[1] == 'l' && buf[2] == 'f') {
247 			if (sscanf(buf+3, "%d %s", &ln, buf1) == 2) {
248 				free(curfile->fname);
249 				printlf(curfile->lineno = ln, curfile->fname = tostring(buf1));
250 			} else
251 				printlf(curfile->lineno = ln, NULL);
252 		} else
253 			fputs(buf, stdout);
254 	}
255 }
256 
257 void reset(void)
258 {
259 	obj *op;
260 	int i;
261 	extern int nstack;
262 	extern	void freesymtab(struct symtab *);
263 
264 	for (i = 0; i < nobj; i++) {
265 		op = objlist[i];
266 		if (op->o_type == BLOCK)
267 			freesymtab(op->o_symtab);
268 		free((char *)objlist[i]);
269 	}
270 	nobj = 0;
271 	nattr = 0;
272 	for (i = 0; i < ntext; i++)
273 		if (text[i].t_val)
274 			free(text[i].t_val);
275 	ntext = ntext1 = 0;
276 	codegen = synerr = 0;
277 	nstack = 0;
278 	curx = cury = 0;
279 	PEstring = 0;
280 	hvmode = R_DIR;
281 	xmin = ymin = 30000;
282 	xmax = ymax = -30000;
283 }