#ifndef lint
static const char SCCSID[]="@(#)geod.c 4.8 95/09/23 GIE REL";
#endif
/* <<<< Geodesic filter program >>>> */
# include <ctype.h>
# include <stdio.h>
# include "projects.h"
# include "geodesic.h"
# include "emess.h"
# include <string.h>
# define MAXLINE 200
# define MAX_PARGS 50
# define TAB putchar('\t')
static int
fullout = 0, /* output full set of geodesic values */
tag = '#', /* beginning of line tag character */
pos_azi = 0, /* output azimuths as positive values */
inverse = 0; /* != 0 then inverse geodesic */
static char
*oform = (char *)0, /* output format for decimal degrees */
*osform = "%.3f", /* output format for S */
pline[50], /* work string */
*usage =
"%s\nusage: %s [ -afFIptTwW [args] ] [ +opts[=arg] ] [ files ]\n";
static GEODESIC_T Geodesic;
static GEODESIC_T *GEODESIC = &Geodesic;
static void
printLL(double p, double l) {
if (oform) {
(void)printf(oform, p * RAD_TO_DEG); TAB;
(void)printf(oform, l * RAD_TO_DEG);
} else {
(void)fputs(rtodms(pline, p, 'N', 'S'),stdout); TAB;
(void)fputs(rtodms(pline, l, 'E', 'W'),stdout);
}
}
static void
do_arc(void) {
double az;
printLL(GEODESIC->p2.u, GEODESIC->p2.v); putchar('\n');
for (az = GEODESIC->ALPHA12; GEODESIC->n_alpha--; ) {
GEODESIC->ALPHA12 = az = adjlon(az + GEODESIC->del_alpha);
geod_pre(GEODESIC);
geod_for(GEODESIC);
printLL(GEODESIC->p2.u, GEODESIC->p2.v); putchar('\n');
}
}
static void /* generate intermediate geodesic coordinates */
do_geod(void) {
double phil, laml, del_S;
phil = GEODESIC->p2.u;
laml = GEODESIC->p2.v;
printLL(GEODESIC->p1.u, GEODESIC->p1.v); putchar('\n');
for ( GEODESIC->DIST = del_S = GEODESIC->DIST / GEODESIC->n_S; --(GEODESIC->n_S); GEODESIC->DIST += del_S) {
geod_for(GEODESIC);
printLL(GEODESIC->p2.u, GEODESIC->p2.v); putchar('\n');
}
printLL(phil, laml); putchar('\n');
}
void static /* file processing function */
process(FILE *fid) {
char line[MAXLINE+3], *s;
for (;;) {
++emess_dat.File_line;
if (!(s = fgets(line, MAXLINE, fid)))
break;
if (!strchr(s, '\n')) { /* overlong line */
int c;
strcat(s, "\n");
/* gobble up to newline */
while ((c = fgetc(fid)) != EOF && c != '\n') ;
}
if (*s == tag) {
fputs(line, stdout);
continue;
}
GEODESIC->p1.u = dmstor(s, &s);
GEODESIC->p1.v = dmstor(s, &s);
if (inverse) {
GEODESIC->p2.u = dmstor(s, &s);
GEODESIC->p2.v = dmstor(s, &s);
geod_inv(GEODESIC);
} else {
GEODESIC->ALPHA12 = dmstor(s, &s);
GEODESIC->DIST = strtod(s, &s) * GEODESIC->TO_METER;
geod_pre(GEODESIC);
geod_for(GEODESIC);
}
if (!*s && (s > line)) --s; /* assumed we gobbled \n */
if (pos_azi) {
if (GEODESIC->ALPHA12 < 0.) GEODESIC->ALPHA12 += TWOPI;
if (GEODESIC->ALPHA21 < 0.) GEODESIC->ALPHA21 += TWOPI;
}
if (fullout) {
printLL(GEODESIC->p1.u, GEODESIC->p1.v); TAB;
printLL(GEODESIC->p2.u, GEODESIC->p2.v); TAB;
if (oform) {
(void)printf(oform, GEODESIC->ALPHA12 * RAD_TO_DEG); TAB;
(void)printf(oform, GEODESIC->ALPHA21 * RAD_TO_DEG); TAB;
(void)printf(osform, GEODESIC->DIST * GEODESIC->FR_METER);
} else {
(void)fputs(rtodms(pline, GEODESIC->ALPHA12, 0, 0), stdout); TAB;
(void)fputs(rtodms(pline, GEODESIC->ALPHA21, 0, 0), stdout); TAB;
(void)printf(osform, GEODESIC->DIST * GEODESIC->FR_METER);
}
} else if (inverse)
if (oform) {
(void)printf(oform, GEODESIC->ALPHA12 * RAD_TO_DEG); TAB;
(void)printf(oform, GEODESIC->ALPHA21 * RAD_TO_DEG); TAB;
(void)printf(osform, GEODESIC->DIST * GEODESIC->FR_METER);
} else {
(void)fputs(rtodms(pline, GEODESIC->ALPHA12, 0, 0), stdout); TAB;
(void)fputs(rtodms(pline, GEODESIC->ALPHA21, 0, 0), stdout); TAB;
(void)printf(osform, GEODESIC->DIST * GEODESIC->FR_METER);
}
else {
printLL(GEODESIC->p2.u, GEODESIC->p2.v); TAB;
if (oform)
(void)printf(oform, GEODESIC->ALPHA21 * RAD_TO_DEG);
else
(void)fputs(rtodms(pline, GEODESIC->ALPHA21, 0, 0), stdout);
}
(void)fputs(s, stdout);
}
}
static char *pargv[MAX_PARGS];
static int pargc = 0;
int main(int argc, char **argv) {
char *arg, **eargv = argv, *strnchr();
FILE *fid;
static int eargc = 0, c;
if (emess_dat.Prog_name = strrchr(*argv,'/')) ++emess_dat.Prog_name;
else emess_dat.Prog_name = *argv;
inverse = ! strncmp(emess_dat.Prog_name, "inv", 3);
if (argc <= 1 ) {
(void)fprintf(stderr, usage, pj_get_release(),
emess_dat.Prog_name);
exit (0);
}
/* process run line arguments */
while (--argc > 0) { /* collect run line arguments */
if(**++argv == '-') for(arg = *argv;;) {
switch(*++arg) {
case '\0': /* position of "stdin" */
if (arg[-1] == '-') eargv[eargc++] = "-";
break;
case 'a': /* output full set of values */
fullout = 1;
continue;
case 'I': /* alt. inverse spec. */
inverse = 1;
continue;
case 't': /* set col. one char */
if (arg[1]) tag = *++arg;
else emess(1,"missing -t col. 1 tag");
continue;
case 'W': /* specify seconds precision */
case 'w': /* -W for constant field width */
if ((c = arg[1]) && isdigit(c)) {
set_rtodms(c - '0', *arg == 'W');
++arg;
} else
emess(1,"-W argument missing or non-digit");
continue;
case 'f': /* alternate output format degrees or xy */
if (--argc <= 0)
noargument: emess(1,"missing argument for -%c",*arg);
oform = *++argv;
continue;
case 'F': /* alternate output format degrees or xy */
if (--argc <= 0) goto noargument;
osform = *++argv;
continue;
case 'l':
if (!arg[1] || arg[1] == 'e') { /* list of ellipsoids */
struct PJ_ELLPS *le;
for (le=pj_get_ellps_ref(); le->id ; ++le)
(void)printf("%9s %-16s %-16s %s\n",
le->id, le->major, le->ell, le->name);
} else if (arg[1] == 'u') { /* list of units */
struct PJ_UNITS *lu;
for (lu = pj_get_units_ref();lu->id ; ++lu)
(void)printf("%12s %-20s %s\n",
lu->id, lu->to_meter, lu->name);
} else
emess(1,"invalid list option: l%c",arg[1]);
exit( 0 );
case 'p': /* output azimuths as positive */
pos_azi = 1;
continue;
default:
emess(1, "invalid option: -%c",*arg);
break;
}
break;
} else if (**argv == '+') /* + argument */
if (pargc < MAX_PARGS)
pargv[pargc++] = *argv + 1;
else
emess(1,"overflowed + argument table");
else /* assumed to be input file name(s) */
eargv[eargc++] = *argv;
}
/* done with parameter and control input */
GEOD_init(pargc, pargv, GEODESIC); /* setup projection */
if ((GEODESIC->n_alpha || GEODESIC->n_S) && eargc)
emess(1,"files specified for arc/geodesic mode");
if (GEODESIC->n_alpha)
do_arc();
else if (GEODESIC->n_S)
do_geod();
else { /* process input file list */
if (eargc == 0) /* if no specific files force sysin */
eargv[eargc++] = "-";
for ( ; eargc-- ; ++eargv) {
if (**eargv == '-') {
fid = stdin;
emess_dat.File_name = "<stdin>";
} else {
if ((fid = fopen(*eargv, "r")) == NULL) {
emess(-2, *eargv, "input file");
continue;
}
emess_dat.File_name = *eargv;
}
emess_dat.File_line = 0;
process(fid);
(void)fclose(fid);
emess_dat.File_name = (char *)0;
}
}
exit(0); /* normal completion */
}
