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/* stdlib is needed for the abs function */
#include <stdlib.h>
/*
The following prototype code was provided by Doug Tody, NRAO, for
performing conversion between pixel arrays and line lists. The
compression technique is used in IRAF.
*/
int pl_p2li (int *pxsrc, int xs, short *lldst, int npix);
int pl_l2pi (short *ll_src, int xs, int *px_dst, int npix);
/*
* PL_P2L -- Convert a pixel array to a line list. The length of the list is
* returned as the function value.
*
* Translated from the SPP version using xc -f, f2c. 8Sep99 DCT.
*/
#ifndef min
#define min(a,b) (((a)<(b))?(a):(b))
#endif
#ifndef max
#define max(a,b) (((a)>(b))?(a):(b))
#endif
int pl_p2li (int *pxsrc, int xs, short *lldst, int npix)
/* int *pxsrc; input pixel array */
/* int xs; starting index in pxsrc (?) */
/* short *lldst; encoded line list */
/* int npix; number of pixels to convert */
{
/* System generated locals */
int ret_val, i__1, i__2, i__3;
/* Local variables */
static int zero, v, x1, hi, ip, dv, xe, np, op, iz, nv, pv, nz;
/* Parameter adjustments */
--lldst;
--pxsrc;
/* Function Body */
if (! (npix <= 0)) {
goto L110;
}
ret_val = 0;
goto L100;
L110:
lldst[3] = -100;
lldst[2] = 7;
lldst[1] = 0;
lldst[6] = 0;
lldst[7] = 0;
xe = xs + npix - 1;
op = 8;
zero = 0;
/* Computing MAX */
i__1 = zero, i__2 = pxsrc[xs];
pv = max(i__1,i__2);
x1 = xs;
iz = xs;
hi = 1;
i__1 = xe;
for (ip = xs; ip <= i__1; ++ip) {
if (! (ip < xe)) {
goto L130;
}
/* Computing MAX */
i__2 = zero, i__3 = pxsrc[ip + 1];
nv = max(i__2,i__3);
if (! (nv == pv)) {
goto L140;
}
goto L120;
L140:
if (! (pv == 0)) {
goto L150;
}
pv = nv;
x1 = ip + 1;
goto L120;
L150:
goto L131;
L130:
if (! (pv == 0)) {
goto L160;
}
x1 = xe + 1;
L160:
L131:
np = ip - x1 + 1;
nz = x1 - iz;
if (! (pv > 0)) {
goto L170;
}
dv = pv - hi;
if (! (dv != 0)) {
goto L180;
}
hi = pv;
if (! (abs(dv) > 4095)) {
goto L190;
}
lldst[op] = (short) ((pv & 4095) + 4096);
++op;
lldst[op] = (short) (pv / 4096);
++op;
goto L191;
L190:
if (! (dv < 0)) {
goto L200;
}
lldst[op] = (short) (-dv + 12288);
goto L201;
L200:
lldst[op] = (short) (dv + 8192);
L201:
++op;
if (! (np == 1 && nz == 0)) {
goto L210;
}
v = lldst[op - 1];
lldst[op - 1] = (short) (v | 16384);
goto L91;
L210:
L191:
L180:
L170:
if (! (nz > 0)) {
goto L220;
}
L230:
if (! (nz > 0)) {
goto L232;
}
lldst[op] = (short) min(4095,nz);
++op;
/* L231: */
nz += -4095;
goto L230;
L232:
if (! (np == 1 && pv > 0)) {
goto L240;
}
lldst[op - 1] = (short) (lldst[op - 1] + 20481);
goto L91;
L240:
L220:
L250:
if (! (np > 0)) {
goto L252;
}
lldst[op] = (short) (min(4095,np) + 16384);
++op;
/* L251: */
np += -4095;
goto L250;
L252:
L91:
x1 = ip + 1;
iz = x1;
pv = nv;
L120:
;
}
/* L121: */
lldst[4] = (short) ((op - 1) % 32768);
lldst[5] = (short) ((op - 1) / 32768);
ret_val = op - 1;
goto L100;
L100:
return ret_val;
} /* plp2li_ */
/*
* PL_L2PI -- Translate a PLIO line list into an integer pixel array.
* The number of pixels output (always npix) is returned as the function
* value.
*
* Translated from the SPP version using xc -f, f2c. 8Sep99 DCT.
*/
int pl_l2pi (short *ll_src, int xs, int *px_dst, int npix)
/* short *ll_src; encoded line list */
/* int xs; starting index in ll_src */
/* int *px_dst; output pixel array */
/* int npix; number of pixels to convert */
{
/* System generated locals */
int ret_val, i__1, i__2;
/* Local variables */
static int data, sw0001, otop, i__, lllen, i1, i2, x1, x2, ip, xe, np,
op, pv, opcode, llfirt;
static int skipwd;
/* Parameter adjustments */
--px_dst;
--ll_src;
/* Function Body */
if (! (ll_src[3] > 0)) {
goto L110;
}
lllen = ll_src[3];
llfirt = 4;
goto L111;
L110:
lllen = (ll_src[5] << 15) + ll_src[4];
llfirt = ll_src[2] + 1;
L111:
if (! (npix <= 0 || lllen <= 0)) {
goto L120;
}
ret_val = 0;
goto L100;
L120:
xe = xs + npix - 1;
skipwd = 0;
op = 1;
x1 = 1;
pv = 1;
i__1 = lllen;
for (ip = llfirt; ip <= i__1; ++ip) {
if (! skipwd) {
goto L140;
}
skipwd = 0;
goto L130;
L140:
opcode = ll_src[ip] / 4096;
data = ll_src[ip] & 4095;
sw0001 = opcode;
goto L150;
L160:
x2 = x1 + data - 1;
i1 = max(x1,xs);
i2 = min(x2,xe);
np = i2 - i1 + 1;
if (! (np > 0)) {
goto L170;
}
otop = op + np - 1;
if (! (opcode == 4)) {
goto L180;
}
i__2 = otop;
for (i__ = op; i__ <= i__2; ++i__) {
px_dst[i__] = pv;
/* L190: */
}
/* L191: */
goto L181;
L180:
i__2 = otop;
for (i__ = op; i__ <= i__2; ++i__) {
px_dst[i__] = 0;
/* L200: */
}
/* L201: */
if (! (opcode == 5 && i2 == x2)) {
goto L210;
}
px_dst[otop] = pv;
L210:
L181:
op = otop + 1;
L170:
x1 = x2 + 1;
goto L151;
L220:
pv = (ll_src[ip + 1] << 12) + data;
skipwd = 1;
goto L151;
L230:
pv += data;
goto L151;
L240:
pv -= data;
goto L151;
L250:
pv += data;
goto L91;
L260:
pv -= data;
L91:
if (! (x1 >= xs && x1 <= xe)) {
goto L270;
}
px_dst[op] = pv;
++op;
L270:
++x1;
goto L151;
L150:
++sw0001;
if (sw0001 < 1 || sw0001 > 8) {
goto L151;
}
switch ((int)sw0001) {
case 1: goto L160;
case 2: goto L220;
case 3: goto L230;
case 4: goto L240;
case 5: goto L160;
case 6: goto L160;
case 7: goto L250;
case 8: goto L260;
}
L151:
if (! (x1 > xe)) {
goto L280;
}
goto L131;
L280:
L130:
;
}
L131:
i__1 = npix;
for (i__ = op; i__ <= i__1; ++i__) {
px_dst[i__] = 0;
/* L290: */
}
/* L291: */
ret_val = npix;
goto L100;
L100:
return ret_val;
} /* pll2pi_ */
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