int
main(int argc, char **argv)
{
cwp_String key[SU_NKEYS]; /* array of keywords */
cwp_String type[SU_NKEYS]; /* array of types for key */
int index[SU_NKEYS]; /* array of indexes for key */
int ikey; /* key counter */
int nkeys; /* number of header fields set */
int n; /* number of min,max values */
Value val; /* value of key field */
double fval; /* value of key field */
float *min=NULL; /* array of "min" values */
float *max=NULL; /* array of "max" values */
/* Initialize */
initargs(argc, argv);
requestdoc(1);
/* Get "key" values */
if ((nkeys=countparval("key"))!=0) {
getparstringarray("key",key);
} else {
key[0]="cdp";
}
/* get types and indexes corresponding to the keys */
for (ikey=0; ikey<nkeys; ++ikey) {
type[ikey]=hdtype(key[ikey]);
index[ikey]=getindex(key[ikey]);
}
/* get "min" values */
if ((n=countparval("min"))!=0) {
if (n!=nkeys)
err("number of a values not equal to number of keys");
min=ealloc1float(n);
getparfloat("min",min);
} else {
min=ealloc1float(nkeys);
for (ikey=0; ikey<nkeys; ++ikey) min[ikey]=0.;
}
/* get "max" values */
if ((n=countparval("max"))!=0) {
if (n!=nkeys)
err("number of a values not equal to number of keys");
max=ealloc1float(n);
getparfloat("max",max);
} else {
max=ealloc1float(nkeys);
for (ikey=0; ikey<nkeys; ++ikey) max[ikey]=ULONG_MAX;
}
/* get types and index values */
for (ikey=0; ikey<nkeys; ++ikey) {
type[ikey] = hdtype(key[ikey]);
index[ikey] = getindex(key[ikey]);
}
while (gettr(&tr)) {
for (ikey=0; ikey<nkeys; ++ikey) {
gethval(&tr, index[ikey], &val);
fval = vtof(type[ikey], val);
if (fval < min[ikey]) {
changeval(type[ikey], &val, min[ikey]);
puthval(&tr, index[ikey], &val);
} else if (fval > max[ikey]) {
changeval(type[ikey], &val, max[ikey]);
puthval(&tr, index[ikey], &val);
}
}
puttr(&tr);
}
return(CWP_Exit());
}
void intout(float *xi, float *xo, float *yo, char *hdrs, int nxi, int nxo,
int nt, FILE *outfp, int extrap,
String hdtp, int index) {
segytrace tro, tr1, tr2;
float tmp, res, ftmp;
int one=1, indx, itmp, ix, it;
float sx, gx, sy, gy, mx, my, dd, ofo;
Value val;
/* output interpolated result */
for(ix=0;ix<nxo;ix++) {
for(it=0;it<nt;it++) tro.data[it]=yo[it+ix*nt];
tmp = xo[ix];
bisear_(&nxi,&one,xi,&tmp,&indx);
if(tmp<=xi[0]) {
itmp = 1;
bcopy(hdrs,(char*)&tro,HDRBYTES);
} else if(tmp>=xi[nxi-1]) {
itmp = nxi-1;
bcopy(hdrs+(nxi-1)*HDRBYTES,
(char*)&tro,HDRBYTES);
} else {
if(indx==nxi) indx=indx-1;
itmp = indx;
if(abs(tmp-xi[itmp-1])<abs(tmp-xi[itmp])) {
bcopy(hdrs+(itmp-1)*HDRBYTES,
(char*)&tro,HDRBYTES);
} else {
bcopy(hdrs+itmp*HDRBYTES,
(char*)&tro,HDRBYTES);
}
}
bcopy(hdrs+(itmp-1)*HDRBYTES,(char*)&tr1,
HDRBYTES);
bcopy(hdrs+itmp*HDRBYTES,(char*)&tr2,
HDRBYTES);
res = (tmp-xi[itmp-1])/(xi[itmp]-xi[itmp-1]);
ftmp = tr1.cdp + res*(tr2.cdp-tr1.cdp) + .5;
tro.cdp = ftmp;
ftmp = tr1.mute + res*(tr2.mute-tr1.mute) + .5;
tro.mute = ftmp;
ftmp = tr1.sx + res*(tr2.sx-tr1.sx) + .5;
tro.sx = ftmp;
ftmp = tr1.sy + res*(tr2.sy-tr1.sy) + .5;
tro.sy = ftmp;
ftmp = tr1.gx + res*(tr2.gx-tr1.gx) + .5;
tro.gx = ftmp;
ftmp = tr1.gy + res*(tr2.gy-tr1.gy) + .5;
tro.gy = ftmp;
/* if offsets are the same sign, linearly interpolate
to get the output offset; otherwise, use the
closest trace's offset */
if(tr1.offset*tr2.offset >= 0.) {
ftmp = tr1.offset + res*(tr2.offset-tr1.offset) + .5;
tro.offset = ftmp;
}
if(abs(tmp-xi[itmp-1])<0.1 || abs(tmp-xi[itmp])<0.1) {
tro.duse = 1;
} else {
tro.duse = 2;
}
changeval(hdtp,&val,xo[ix]);
puthval(&tro, index, &val);
/* need to adjust (x,y) of source and receiver, with
the new offset for pre-stack migration */
sx = tro.sx;
sy = tro.sy;
gx = tro.gx;
gy = tro.gy;
mx = (sx+gx)/2.;
my = (sy+gy)/2.;
dd = sqrt((sx-gx)*(sx-gx)+(sy-gy)*(sy-gy));
if(tro.scalco>1) {
dd = dd * tro.scalco;
} else if(tro.scalco<0) {
dd = - dd / tro.scalco;
}
ofo = tro.offset;
if(ofo<0) ofo = - ofo;
if (dd>0.) {
tro.sx = mx+(tro.sx-mx)*ofo/dd;
tro.gx = mx+(tro.gx-mx)*ofo/dd;
tro.sy = my+(tro.sy-my)*ofo/dd;
tro.gy = my+(tro.gy-my)*ofo/dd;
} else {
tro.sx = mx-ofo/2;
tro.gx = mx-ofo/2;
tro.sy = my;
tro.gy = my;
}
if(xi[0]-tmp>0.1 || tmp-xi[nxi-1]>0.1 ) {
if(extrap==0) {
tro.trid = 2;
bzero(tro.data,nt*sizeof(float));
}
}
fputtr(outfp,&tro);
}
}
