7 Obj *var; /* index variable */
10 int op; /* operator */
11 char *str; /* string to push back */
16 For forstk[MAXFOR]; /* stack of for loops */
17 For *forp = forstk; /* pointer to current top */
19 void forloop(Obj *var, double from, double to, int op, double by, char *str) /* set up a for loop */
21 fprintf(tfd, "# for %s from %g to %g by %c %g \n",
22 var->name, from, to, op, by);
23 if (++forp >= forstk+MAXFOR)
24 ERROR "for loop nested too deep" FATAL;
35 void nextfor(void) /* do one iteration of a for loop */
37 /* BUG: this should depend on op and direction */
38 if (forp->var->fval > SLOP * forp->to) { /* loop is done */
41 ERROR "forstk popped too far" FATAL;
42 } else { /* another iteration */
43 pushsrc(String, "\nEndfor\n");
44 pushsrc(String, forp->str);
48 void endfor(void) /* end one iteration of for loop */
53 forp->var->fval += forp->by;
56 forp->var->fval -= forp->by;
59 forp->var->fval *= forp->by;
62 forp->var->fval /= forp->by;
68 char *ifstat(double expr, char *thenpart, char *elsepart)
70 dprintf("if %g then <%s> else <%s>\n", expr, thenpart, elsepart? elsepart : "");
73 pushsrc(Free, thenpart);
74 pushsrc(String, thenpart);
78 return thenpart; /* to be freed later */
83 pushsrc(Free, elsepart);
84 pushsrc(String, elsepart);