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1.1 root 1: #include <stdio.h>
2: #include <ctype.h>
3: #include "grap.h"
4: #include "y.tab.h"
5:
6: double margin = MARGIN; /* extra space around edges */
7: extern double frame_ht, frame_wid, ticklen;
8:
9: char graphname[50] = "Graph";
10: char graphpos[200] = "";
11:
12: print() /* arrange final output */
13: {
14: FILE *fd;
15: Obj *p, *dfp, *setauto();
16: int c;
17: static int firstG1 = 0;
18: double dx, dy, xfac, yfac;
19: extern double pow();
20:
21: if (tfd != NULL) {
22: fclose(tfd); /* end the temp file */
23: tfd = stdout;
24: }
25:
26: if ((p=lookup("margin",0)) != NULL)
27: margin = p->fval;
28: if (frame_ht < 0) /* wasn't set explicitly, so use default */
29: frame_ht = getvar(lookup("frameht", 0));
30: if (frame_wid < 0)
31: frame_wid = getvar(lookup("framewid", 0));
32: dfp = NULL;
33: for (p = objlist; p; p = p->next) {
34: dprintf("print: name = <%s>, type = %d\n", p->name, p->type);
35: if (p->type == NAME) {
36: Point pt, pt1;
37: pt = p->pt;
38: pt1 = p->pt1;
39: fprintf(tfd, "\t# %s %g .. %g, %g .. %g\n",
40: p->name, pt.x, pt1.x, pt.y, pt1.y);
41: if (p->log & XFLAG) {
42: if (pt.x <= 0.0)
43: fatal("can't take log of x coord %g", pt.x);
44: logit(pt.x);
45: logit(pt1.x);
46: }
47: if (p->log & YFLAG) {
48: if (pt.y <= 0.0)
49: fatal("can't take log of y coord %g", pt.y);
50: logit(pt.y);
51: logit(pt1.y);
52: }
53: if (!(p->coord & XFLAG)) {
54: dx = pt1.x - pt.x;
55: pt.x -= margin * dx;
56: pt1.x += margin * dx;
57: }
58: if (!(p->coord & YFLAG)) {
59: dy = pt1.y - pt.y;
60: pt.y -= margin * dy;
61: pt1.y += margin * dy;
62: }
63: if (autoticks && strcmp(p->name, dflt_coord) == 0) {
64: p->pt = pt;
65: p->pt1 = pt1;
66: if (p->log & XFLAG) {
67: p->pt.x = pow(10.0, pt.x);
68: p->pt1.x = pow(10.0, pt1.x);
69: }
70: if (p->log & YFLAG) {
71: p->pt.y = pow(10.0, pt.y);
72: p->pt1.y = pow(10.0, pt1.y);
73: }
74: dfp = setauto(p);
75: }
76: dx = pt1.x - pt.x;
77: dy = pt1.y - pt.y;
78: xfac = dx > 0 ? frame_wid/dx : frame_wid/2;
79: yfac = dy > 0 ? frame_ht/dy : frame_ht/2;
80:
81: fprintf(tfd, "define xy_%s @ ", p->name);
82: if (dx > 0)
83: fprintf(tfd, "\t(($1)-(%g))*%g", pt.x, xfac);
84: else
85: fprintf(tfd, "\t%g", xfac);
86: if (dy > 0)
87: fprintf(tfd, ", (($2)-(%g))*%g @\n", pt.y, yfac);
88: else
89: fprintf(tfd, ", %g @\n", yfac);
90: fprintf(tfd, "define x_%s @ ", p->name);
91: if (dx > 0)
92: fprintf(tfd, "\t(($1)-(%g))*%g @\n", pt.x, xfac);
93: else
94: fprintf(tfd, "\t%g @\n", xfac);
95: fprintf(tfd, "define y_%s @ ", p->name);
96: if (dy > 0)
97: fprintf(tfd, "\t(($1)-(%g))*%g @\n", pt.y, yfac);
98: else
99: fprintf(tfd, "\t%g @\n", yfac);
100: }
101: }
102: if (codegen)
103: frame();
104: if (codegen && autoticks && dfp)
105: do_autoticks(dfp);
106:
107: if ((fd = fopen(tempfile, "r")) != NULL) {
108: while ((c = getc(fd)) != EOF)
109: putc(c, tfd);
110: fclose(fd);
111: }
112: tfd = NULL;
113: }
114:
115: endstat() /* clean up after each statement */
116: {
117: extern int just, sizeop, tick_dir;
118: extern double sizexpr, lab_up, lab_rt;
119:
120: just = sizeop = 0;
121: lab_up = lab_rt = 0.0;
122: sizexpr = 0.0;
123: nnum = 0;
124: ntick = 0;
125: tside = 0;
126: tick_dir = OUT;
127: ticklen = TICKLEN;
128: }
129:
130: graph(s) /* graph statement */
131: char *s;
132: {
133: char *p, *os;
134: int c;
135:
136: if (codegen) {
137: fprintf(stdout, "%s: [\n", graphname);
138: print(); /* pump out previous graph */
139: fprintf(stdout, "\n] %s\n", graphpos);
140: reset();
141: }
142: if (s) {
143: dprintf("into graph with <%s>\n", s);
144: opentemp();
145: os = s;
146: while ((c = *s) == ' ' || c == '\t')
147: s++;
148: if (c == '\0')
149: yyerror("no name on graph statement");
150: if (!isupper(s[0]))
151: yyerror("graph name %s must be capitalized", s);
152: for (p=graphname; (c = *s) != ' ' && c != '\t' && c != '\0'; )
153: *p++ = *s++;
154: *p = '\0';
155: strcpy(graphpos, s);
156: dprintf("graphname = <%s>, graphpos = <%s>\n", graphname, graphpos);
157: free(os);
158: }
159: }
160:
161: setup() /* done at each .G1 */
162: {
163: static int firstG1 = 0;
164:
165: reset();
166: opentemp();
167: frame_ht = frame_wid = -1; /* reset in frame() */
168: ticklen = getvar(lookup("ticklen", 0));
169: if (firstG1++ == 0)
170: do_first();
171: codegen = synerr = 0;
172: strcpy(graphname, "Graph");
173: strcpy(graphpos, "");
174: }
175:
176: do_first() /* done at first .G1: definitions, etc. */
177: {
178: extern int lib;
179: extern char *lib_defines;
180: static char buf[50], buf1[50]; /* static because pbstr uses them */
181:
182: sprintf(buf, "define pid /%d/\n", getpid());
183: pbstr(buf);
184: if (lib != 0) {
185: if (access(lib_defines, 4) == 0) {
186: sprintf(buf1, "copy \"%s\"\n", lib_defines);
187: pbstr(buf1);
188: } else {
189: fprintf(stderr, "grap warning: can't open %s\n", lib_defines);
190: }
191: }
192: }
193:
194: reset() /* done at each "graph ..." statement */
195: {
196: Obj *p, *np, *deflist;
197: extern int tlist, toffside, autodir;
198:
199: curr_coord = dflt_coord;
200: ncoord = auto_x = 0;
201: autoticks = LEFT|BOT;
202: autodir = 0;
203: tside = tlist = toffside = 0;
204: tick_dir = OUT;
205: margin = MARGIN;
206: deflist = NULL;
207: for (p = objlist; p; p = np) {
208: np = p->next;
209: if (p->type == DEFNAME || p->type == VARNAME) {
210: p->next = deflist;
211: deflist = p;
212: } else {
213: free(p->name);
214: freeattr(p->attr);
215: free(p);
216: }
217: }
218: objlist = deflist;
219: }
220:
221: opentemp()
222: {
223: if (tfd != NULL)
224: fclose(tfd);
225: if ((tfd = fopen(tempfile, "w")) == NULL) {
226: fprintf(stderr, "grap: can't open %s\n", tempfile);
227: exit(1);
228: }
229: }
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