6 #define PI 3.1415926535897932384626433832795028841971693993751
9 #define MAXWID 8.5 /* default limits max picture to 8.5 x 11; */
10 #define MAXHT 11 /* change to taste without peril */
12 #define dprintf if(dbg)printf
14 extern char errbuf[200];
16 #undef sprintf /* Snow Leopard */
18 #define ERROR sprintf(errbuf,
19 #define FATAL ), yyerror(errbuf), exit(1)
20 #define WARNING ), yyerror(errbuf)
26 #define HEAD12 (HEAD1+HEAD2)
28 #define CW_ARC 8 /* clockwise arc */
29 #define DOTBIT 16 /* line styles */
31 #define FILLBIT 64 /* gray-fill on boxes, etc. */
33 #define CENTER 01 /* text attributes */
40 #define SCALE 1.0 /* default scale: units/inch */
41 #define WID 0.75 /* default width for boxes and ellipses */
43 #define HT 0.5 /* default height and line length */
48 /* these have to be like so, so that we can write */
49 /* things like R & V, etc. */
56 #define ishor(n) (((n) & V) == 0)
57 #define isvert(n) (((n) & V) != 0)
58 #define isright(n) ((n) == R_DIR)
59 #define isleft(n) ((n) == L_DIR)
60 #define isdown(n) ((n) == D_DIR)
61 #define isup(n) ((n) == U_DIR)
63 typedef float ofloat; /* for o_val[] in obj; could be double */
65 typedef struct obj { /* stores various things in variable length */
67 int o_count; /* number of things */
68 int o_nobj; /* index in objlist */
69 int o_mode; /* hor or vert */
70 float o_x; /* coord of "center" */
72 int o_nt1; /* 1st index in text[] for this object */
73 int o_nt2; /* 2nd; difference is #text strings */
74 int o_attr; /* HEAD, CW, INVIS, etc., go here */
75 int o_size; /* linesize */
76 int o_nhead; /* arrowhead style */
77 struct symtab *o_symtab; /* symtab for [...] */
78 float o_ddval; /* value of dot/dash expression */
79 float o_fillval; /* gray scale value */
80 ofloat o_val[1]; /* actually this will be > 1 in general */
81 /* type is not always FLOAT!!!! */
84 typedef union { /* the yacc stack type */
92 extern YYSTYPE yylval, yyval;
98 struct symtab *s_next;
101 typedef struct { /* attribute of an object */
108 int t_type; /* CENTER, LJUST, etc. */
109 char t_op; /* optional sign for size changes */
110 char t_size; /* size, abs or rel */
121 typedef struct { /* input source */
122 int type; /* Macro, String, File */
123 char *sp; /* if String or Macro */
126 extern Src src[], *srcp; /* input source stack */
134 extern Infile infile[], *curfile;
137 typedef struct { /* argument stack */
138 char *argstk[MAXARGS]; /* pointers to args */
139 char *argval; /* points to space containing args */
143 extern obj **objlist;
144 extern int nobj, nobjlist;
146 extern int nattr, nattrlist;
148 extern int ntextlist;
151 extern double curx, cury;
155 extern double deltx, delty;
159 extern double xmin, ymin, xmax, ymax;
169 struct symtab *p_symtab;
171 extern struct pushstack stack[];
176 #define Log10(x) errcheck(log10(x), "log")
177 #define Exp(x) errcheck(exp(x), "exp")
178 #define Sqrt(x) errcheck(sqrt(x), "sqrt")
181 char* addnewline(char *p) /* add newline to end of p */;
182 obj* addpos(obj *p, obj *q);
183 void addtattr(int sub) /* add text attrib to existing item */;
184 void arc(double xc, double yc, double x0, double y0, double x1, double y1) /* draw arc with center xc,yc */;
185 void arc_extreme(double x0, double y0, double x1, double y1, double xc, double yc);
186 obj* arcgen(int type) /* handles circular and (eventually) elliptical arcs */;
187 void arrow(double x0, double y0, double x1, double y1, double w, double h, double ang, int nhead) /* draw arrow (without shaft) */ /* head wid w, len h, rotated ang */ /* and drawn with nhead lines */;
188 int baldelim(int c, char *s) /* replace c by balancing entry in s */;
189 void blockadj(obj *p) /* adjust coords in block starting at p */;
190 obj* blockgen(obj *p, obj *q) /* handles [...] */;
192 void checkscale(char *s) /* if s is "scale", adjust default variables */;
193 obj* circgen(int type);
194 void copy(void) /* begin input from file, etc. */;
195 void copydef(struct symtab *p) /* remember macro symtab ptr */;
196 void copyfile(char *s) /* remember file to start reading from */;
197 struct symtab* copythru(char *s) /* collect the macro name or body for thru */;
198 void copyuntil(char *s) /* string that terminates a thru */;
199 int curdir(void) /* convert current dir (hvmode) to RIGHT, LEFT, etc. */;
200 void definition(char *s) /* collect definition for s and install */ /* definitions picked up lexically */;
201 char* delimstr(char *s) /* get body of X ... X */ /* message if too big */;
202 void do_thru(void) /* read one line, make into a macro expansion */;
203 void dodef(struct symtab *stp) /* collect args and switch input to defn */;
205 void dotbox(double x0, double y0, double x1, double y1, int ddtype, double ddval) /* dotted or dashed box */;
206 void dotext(obj *p) /* print text strings of p in proper vertical spacing */;
207 void dotline(double x0, double y0, double x1, double y1, int ddtype, double ddval);
208 void dotline(double x0, double y0, double x1, double y1, int ddtype, double ddval) /* dotted line */;
209 void ellipse(double x, double y, double r1, double r2);
210 void endfor(void) /* end one iteration of for loop */;
211 void eprint(void) /* try to print context around error */;
212 double errcheck(double x, char *s);
213 void exprsave(double f);
214 void extreme(double x, double y) /* record max and min x and y values */;
216 void fillstart(double v) /* only choose black, light grey (.75), or white, for now */;
217 obj* fixpos(obj *p, double x, double y);
218 void forloop(char *, double, double, int, double, char *) /* set up a for loop */;
219 void fpecatch(int arg);
220 void freedef(char *s) /* free definition for string s */;
221 void freesymtab(struct symtab *p) /* free space used by symtab at p */;
222 int getarg(char *p) /* pick up single argument, store in p, return length */;
223 YYSTYPE getblk(obj *p, char *s) /* find union type for s in p */;
224 double getblkvar(obj *p, char *s) /* find variable s2 in block p */;
225 obj* getblock(obj *p, char *s) /* find variable s in block p */;
226 double getcomp(obj *p, int t) /* return component of a position */;
228 obj* getfirst(int n, int t) /* find n-th occurrence of type t */;
229 double getfval(char *s) /* return float value of variable s */;
230 obj* gethere(void) /* make a place for curx,cury */;
231 obj* getlast(int n, int t) /* find n-th previous occurrence of type t */;
232 obj* getpos(obj *p, int corner) /* find position of point */;
233 YYSTYPE getvar(char *s) /* return value of variable s (usually pointer) */;
234 char * grow(char *ptr, char *name, int num, int size) /* make array bigger */;
235 char* ifstat(double expr, char *thenpart, char *elsepart);
237 void label(char *s, int t, int nh) /* text s of type t nh half-lines up */;
238 obj* leftthing(int c) /* called for {... or [... */ /* really ought to be separate functions */;
239 obj* linegen(int type);
240 struct symtab* lookup(char *s) /* find s in symtab */;
241 int main(int argc, char **argv);
242 void makeattr(int type, int sub, YYSTYPE val) /* add attribute type and val */;
243 obj* makebetween(double f, obj *p1, obj* p2) /* make position between p1 and p2 */;
244 void makefattr(int type, int sub, double f) /* double attr */;
245 void makeiattr(int type, int i) /* int attr */;
246 obj* makenode(int type, int n);
247 void makeoattr(int type, obj *o) /* obj* attr */;
248 obj* makepos(double x, double y) /* make a position cell */;
249 void maketattr(int sub, char *p) /* text attribute: takes two */;
250 struct symtab* makevar(char *s, int t, YYSTYPE v) /* make variable named s in table */ /* assumes s is static or from tostring */;
251 void makevattr(char *p) /* varname attribute */;
254 void nextfor(void) /* do one iteration of a for loop */;
256 void popsrc(void) /* restore an old one */;
258 void printexpr(double f) /* print expression for debugging */;
259 void printlf(int line, char *name);
260 void printpos(obj *p) /* print position for debugging */;
261 void pushsrc(int type, char *ptr) /* new input source */;
262 int quadrant(double x, double y);
264 void resetvar(void) /* reset variables listed */;
265 obj* rightthing(obj *p, int c) /* called for ... ] or ... } */;
266 void savetext(int t, char *s) /* record text elements for current object */;
267 void setdefaults(void) /* set default sizes for variables like boxht */;
268 int setdir(int n) /* set direction (hvmode) from LEFT, RIGHT, etc. */;
269 void setfval(char *s, double f) /* set variable s to f */;
270 void shell_exec(void) /* do it */;
271 void shell_init(void) /* set up to interpret a shell command */;
272 void shell_text(char *s) /* add string to command being collected */;
273 void space(double x0, double y0, double x1, double y1) /* set limits of page */;
274 void spline(double x, double y, double/*sic*/ n, float *p, int dashed, double ddval);
275 char* sprintgen(char *fmt);
276 obj* subpos(obj *p, obj *q);
278 char* tostring(char *s);
280 obj* troffgen(char *s) /* save away a string of troff commands */;
281 void undefine(char *s) /* undefine macro */;
283 int whatpos(obj *p, int corner, double *px, double *py) /* what is the position (no side effect) */;
284 void yyerror(char *s);
