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MISCRES.C
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C/C++ Source or Header
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1990-10-06
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14KB
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486 lines
/*
Resident odds and ends that don't fit anywhere else.
*/
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <time.h>
#include <stdarg.h>
#ifdef __TURBOC__
#include <dir.h>
#endif
#include "fractint.h"
#include "fractype.h"
/* routines in this module */
extern void restore_active_ovly(void );
extern void findpath(char *filename,char *fullpathname);
extern void notdiskmsg(void );
extern int cvtcentermag(double *Xctr,double *Yctr,double *Magnification);
extern void updatesavename(char *name);
extern int check_key(void );
extern int timer(int timertype,int(*subrtn)(),...);
extern void showtrig(char *buf);
extern int set_trig_array(int k,char *name);
extern void set_trig_pointers(int which);
extern int tab_display(void );
extern int endswithslash(char *fl);
int active_ovly = -1;
long timer_start,timer_interval; /* timer(...) start & total */
extern int active_ovly;
extern int xdots, ydots;
extern int dotmode;
extern int show_orbit;
extern int timerflag;
extern int debugflag;
extern int maxit;
extern int fractype;
/* call next when returning from resident routine and unsure whether
caller is an overlay which has been displaced */
void restore_active_ovly()
{
switch (active_ovly) {
case OVLY_MISCOVL: miscovl_overlay(); break;
case OVLY_CMDFILES: cmdfiles_overlay(); break;
case OVLY_HELP: help_overlay(); break;
case OVLY_PROMPTS: prompts_overlay(); break;
case OVLY_LOADFILE: loadfile_overlay(); break;
case OVLY_ROTATE: rotate_overlay(); break;
case OVLY_PRINTER: printer_overlay(); break;
case OVLY_LINE3D: line3d_overlay(); break;
case OVLY_ENCODER: encoder_overlay(); break;
case OVLY_CALCFRAC: calcfrac_overlay(); break;
}
}
void findpath(char *filename, char *fullpathname) /* return full pathnames */
{
fullpathname[0] = 0; /* indicate none found */
#ifdef __TURBOC__ /* look for the file */
strcpy(fullpathname,searchpath(filename));
#else
_searchenv(filename,"PATH",fullpathname);
#endif
if (fullpathname[0] != 0) /* found it! */
if (strncmp(&fullpathname[2],"\\\\",2) == 0) /* stupid klooge! */
strcpy(&fullpathname[3],filename);
}
void notdiskmsg()
{
static char far sorrymsg[]={"\
I'm sorry, but because of its random-screen-access algorithms, this\n\
type cannot be created using a real-disk based 'video' mode."};
stopmsg(1,sorrymsg);
}
/* convert corners to center/mag */
int cvtcentermag(double *Xctr, double *Yctr, double *Magnification)
{
extern double xxmax,xxmin,yymax,yymin,xx3rd,yy3rd;
double Width, Height, Radius, Ratio;
Width = xxmax - xxmin;
Height = yymax - yymin;
if(xx3rd != xxmin || yy3rd != yymin || Width < 0
|| (Ratio = Height / Width) < 0.749 || Ratio > 0.751)
return(0);
/* calculate center and magnification */
Radius = Height / 2.0;
*Xctr = xxmin + (Width / 2.0);
*Yctr = yymin + Radius;
*Magnification = 1.0 / Radius;
return(1);
}
void updatesavename(char *filename) /* go to the next file name */
{
char *save, *hold;
char name[80],suffix[80];
char *dotptr;
strcpy(name,filename);
suffix[0] = 0;
if ((dotptr = strrchr(name,'.')) != NULL
&& dotptr > strrchr(name,'\\')) {
strcpy(suffix,dotptr);
*dotptr = 0;
}
hold = name + strlen(name) - 1; /* start at the end */
while(hold >= name && (*hold == ' ' || isdigit(*hold))) /* skip backwards */
hold--;
hold++; /* recover first digit */
while (*hold == '0') /* skip leading zeros */
hold++;
save = hold;
while (*save) { /* check for all nines */
if (*save != '9')
break;
save++;
}
if (!*save) /* if the whole thing is nines then back */
save = hold - 1; /* up one place. Note that this will eat */
/* your last letter if you go to far. */
else
save = hold;
itoa(atoi(hold) + 1, save, 10); /* increment the number */
strcpy(filename,name);
strcat(filename,suffix);
}
int check_key()
{
int key;
if((key = keypressed()) != 0) {
if(key != 'o' && key != 'O')
return(-1);
getakey();
if (dotmode != 11)
show_orbit = 1 - show_orbit;
}
return(0);
}
/* timer function:
timer(0,(*fractal)()) fractal engine
timer(1,NULL,int width) decoder
timer(2,NULL,char *savename) encoder
*/
int timer(int timertype,int(*subrtn)(),...)
{
va_list arg_marker; /* variable arg list */
char *savename;
char *timestring;
time_t ltime;
FILE *fp;
int out;
int i;
int do_bench;
va_start(arg_marker,subrtn);
do_bench = timerflag; /* record time? */
if (timertype == 2) /* encoder, record time only if debug=200 */
do_bench = (debugflag == 200);
if(do_bench)
fp=fopen("bench","a");
timer_start = clock();
switch(timertype) {
case 0:
out = (*subrtn)();
break;
case 1:
i = va_arg(arg_marker,int);
out = decoder(i); /* not indirect, safer with overlays */
break;
case 2:
savename = va_arg(arg_marker,char *);
out = encoder(); /* not indirect, safer with overlays */
break;
}
/* next assumes CLK_TCK is 10^n, n>=2 */
timer_interval = (clock() - timer_start) / (CLK_TCK/100);
if(do_bench) {
time(<ime);
timestring = ctime(<ime);
timestring[24] = 0; /*clobber newline in time string */
switch(timertype) {
case 1:
fprintf(fp,"decode ");
break;
case 2:
fprintf(fp,"encode ");
break;
}
fprintf(fp,"%s type=%s resolution = %dx%d maxiter=%d",
timestring,
fractalspecific[fractype].name,
xdots,
ydots,
maxit);
fprintf(fp," time= %ld.%02ld secs\n",timer_interval/100,timer_interval%100);
if(fp != NULL)
fclose(fp);
}
return(out);
}
extern void lStkSin(void), dStkSin(void), lStkCos(void), dStkCos(void);
extern void lStkSinh(void),dStkSinh(void),lStkCosh(void),dStkCosh(void);
extern void lStkExp(void), dStkExp(void), lStkLog(void), dStkLog(void);
extern void lStkSqr(void), dStkSqr(void);
unsigned char trigndx[] = {SIN,SQR,SINH,COSH};
void (*ltrig0)() = lStkSin;
void (*ltrig1)() = lStkSqr;
void (*ltrig2)() = lStkSinh;
void (*ltrig3)() = lStkCosh;
void (*dtrig0)() = dStkSin;
void (*dtrig1)() = dStkSqr;
void (*dtrig2)() = dStkSinh;
void (*dtrig3)() = dStkCosh;
struct trig_funct_lst trigfn[] =
/* changing the order of these alters meaning of *.fra file */
{
{"sin", lStkSin, dStkSin },
{"cos", lStkCos, dStkCos },
{"sinh",lStkSinh,dStkSinh},
{"cosh",lStkCosh,dStkCosh},
{"exp", lStkExp, dStkExp },
{"log", lStkLog, dStkLog },
{"sqr", lStkSqr, dStkSqr }
};
void showtrig(char *buf) /* return display form of active trig functions */
{
int numfn,i;
char tmpbuf[40];
numfn = (fractalspecific[fractype].flags >> 6) & 7;
*buf = 0; /* null string if none */
if (numfn) {
sprintf(buf, " function=%s",trigfn[trigndx[0]].name);
i = 0;
while(++i < numfn) {
sprintf(tmpbuf, "/%s",trigfn[trigndx[i]].name);
strcat(buf,tmpbuf);
}
}
}
/* set array of trig function indices according to "function=" command */
int set_trig_array(int k, char *name)
{
char trigname[6];
int i, lstlen;
char *slash;
strncpy(trigname,name,5);
trigname[5] = 0; /* safety first */
if ((slash = strchr(trigname,'/')))
*slash = 0;
strlwr(trigname);
lstlen = sizeof(trigfn)/sizeof(struct trig_funct_lst);
for(i=0;i<lstlen;i++)
{
if(strcmp(trigname,trigfn[i].name)==0)
{
trigndx[k] = i;
set_trig_pointers(k);
break;
}
}
return(0);
}
void set_trig_pointers(int which)
{
/* set trig variable functions to avoid array lookup time */
int i;
switch(which)
{
case 0:
ltrig0 = trigfn[trigndx[0]].lfunct;
dtrig0 = trigfn[trigndx[0]].dfunct;
break;
case 1: