// General setup for verbs with IRS that do not go through jtirs[12]
// A verb u["n] using this function checks to see whether it has multiple cells; if so,
// it calls here, giving a callback; we split the arguents into cells and call the callback,
// which is often the same original function that called here.
A jtrank2ex(J jt,A a,A w,A fs,I lr,I rr,AF f2){PROLOG(0042);A y,y0,ya,yw,z;B ab,b,wb;
C*u,*uu,*v,*vv;I acn,acr,af,ak,ar,*as,at,k,mn,n=1,p,q,*s,wcn,wcr,wf,wk,wr,*ws,wt,yn,yr,*ys,yt;
RZ(a&&w);
at=AT(a); wt=AT(w);
if(at&SPARSE||wt&SPARSE)R sprank2(a,w,fs,lr,rr,f2);
// ?r=rank, ?s->shape, ?cr=effective rank, ?f=#frame, ?b=relative flag, for each argument
ar=AR(a); as=AS(a); acr=efr(ar,lr); af=ar-acr; ab=ARELATIVE(a);
wr=AR(w); ws=AS(w); wcr=efr(wr,rr); wf=wr-wcr; wb=ARELATIVE(w);
if(!af&&!wf)R CALL2(f2,a,w,fs); // if there's only one cell, run on it, that's the result
// multiple cells. Loop through them.
// ?cn=number of atoms in a cell, ?k=#bytes in a cell, uv point to one cell before aw data
// Allocate y? to hold one cell of ?, with uu,vv pointing to the data of y?
RE(acn=prod(acr,as+af)); ak=acn*bp(at); u=CAV(a)-ak; NEWYA;
RE(wcn=prod(wcr,ws+wf)); wk=wcn*bp(wt); v=CAV(w)-wk; NEWYW;
// b means 'w frame is larger'; p=#larger frame; q=#shorter frame; s->larger frame
// mn=#cells in larger frame (& therefore #cells in result); n=# times to repeat each cell
// from shorter-frame argument
b=af<=wf; p=b?wf:af; q=b?af:wf; s=b?ws:as; RE(mn=prod(p,s)); RE(n=prod(p-q,s+q));
ASSERT(!ICMP(as,ws,q),EVLENGTH); // error if frames are not same as prefix
// Initialize y? to hold data for the first cell; but if ? is empty, set y? to a cell of fills
if(AN(a))MOVEYA else RZ(ya=reshape(vec(INT,acr,as+af),filler(a)));
if(AN(w))MOVEYW else RZ(yw=reshape(vec(INT,wcr,ws+wf),filler(w)));
#define VALENCE 2
#define TEMPLATE 0
#include "cr_t.h"
}
// ------------------------------------------------
// Function: icmp_parse()
// ------------------------------------------------
// Input: Message buffer
// Output: -
// ------------------------------------------------
// Description: Parse a ICMP message
// ------------------------------------------------
void icmp_parse(PPBUF pbuf)
{
// ---------------------
// checksum verification
// ---------------------
icmp_checksum(pbuf->data, pbuf->size);
if(chk_H != 0xff) return;
if(chk_L != 0xff) return;
// -------------------------------
// checks recognized message types
// -------------------------------
switch(ICMP(pbuf->data)->type) {
case PING_REQUEST:
// ---------
// answer it
// ---------
retain_buffer(pbuf);
ip_answer(pbuf);
ICMP(pbuf->data)->type = PING_REPLY;
// ---------------
// update checksum
// ---------------
ICMP(pbuf->data)->checksum = 0;
icmp_checksum(pbuf->data, pbuf->size);
ICMP(pbuf->data)->checksum = HTONS(~WORDOF(chk_H, chk_L));
// ----------------------------
// sends answer to IP interface
// ----------------------------
ip_send(pbuf);
release_buffer(pbuf);
break;
case PING_REPLY:
// --------------------------------------
// answer received, signal waiting thread
// --------------------------------------
os_signal(SIG_ICMP);
break;
}
}
// IRS setup for dyads x op y
// a is x, w is y
// fs is the f field of the verb (the verb to be applied repeatedly) - or 0 if none
// l, r are nominal ranks of fs
// f2 is a setup verb (jtover, jtreshape, etc)
A jtirs2(J jt,A a,A w,A fs,I l,I r,AF f2){A z;I af,ar,*old=jt->rank,rv[2],wf,wr;
// push the jt->rank (pointer to ranks) stack. push/pop may not match, no problem
RZ(a&&w);
ar=AR(a); rv[0]=l=efr(ar,l); af=ar-l; // get rank, effective rank, length of frame...
wr=AR(w); rv[1]=r=efr(wr,r); wf=wr-r; // ...for both args
if(!(af||wf))R CALL2(f2,a,w,fs); // if no frame, call setup verb and return result
ASSERT(!ICMP(AS(a),AS(w),MIN(af,wf)),EVLENGTH); // verify agreement
/* if(af&&wf&&af!=wf)R rank2ex(a,w,fs,l,r,f2); */
jt->rank=rv; z=CALL2(f2,a,w,fs); jt->rank=old; // save ranks, call setup verb, pop rank stack
// Not all setup verbs (*f2)() use the fs argument.
R z;
}
// ------------------------------------------------
// Function: ping_request()
// ------------------------------------------------
// Input: IP address
// Network interface ID
// Output: -
// ------------------------------------------------
// Description: Sends a ping request message
// ------------------------------------------------
void ping_request(IPV4 ip, BYTE interface)
{
PPBUF buf;
buf = ip_new(ip, 64, interface);
if(buf == NULL) return;
// ---------------------
// assemble ICMP message
// ---------------------
IPH(buf->start)->prot = IP_PROT_ICMP;
ICMP(buf->data)->type = PING_REQUEST;
ICMP(buf->data)->code = 0;
ICMP(buf->data)->checksum = 0;
ICMP(buf->data)->id = random();
ICMP(buf->data)->seq = random();
buf->size = sizeof(ICMP_HDR);
// ------------------
// calculate checksum
// ------------------
icmp_checksum(buf->data, buf->size);
ICMP(buf->data)->checksum = HTONS(~WORDOF(chk_H, chk_L));
// -----------------------------
// sends message to IP interface
// -----------------------------
ip_send(buf);
release_buffer(buf);
}
static A jtmerge1(J jt,A w,A ind){A z;B*b;C*wc,*zc;D*wd,*zd;I c,it,j,k,m,r,*s,t,*u,*wi,*zi;
RZ(w&&ind);
r=MAX(0,AR(w)-1); s=1+AS(w); t=AT(w); k=bp(t); m=IC(w); c=aii(w);
ASSERT(!(t&SPARSE),EVNONCE);
ASSERT(r==AR(ind),EVRANK);
ASSERT(!ICMP(s,AS(ind),r),EVLENGTH);
GA(z,t,c,r,s);
if(!(AT(ind)&B01+INT))RZ(ind=cvt(INT,ind));
it=AT(ind); u=AV(ind); b=(B*)u;
ASSERT(!c||1<m||!(it&B01),EVINDEX);
ASSERT(!c||1!=m||!memchr(b,C1,c),EVINDEX);
zi=AV(z); zc=(C*)zi; zd=(D*)zc;
wi=AV(w); wc=(C*)wi; wd=(D*)wc;
switch(MCASE(it,k)){
case MCASE(B01,sizeof(C)): DO(c, *zc++=wc[*b++?i+c:i];); break;
case MCASE(B01,sizeof(I)): DO(c, *zi++=wi[*b++?i+c:i];); break;
A jtirs2(J jt,A a,A w,A fs,I l,I r,AF f2) {
A z;
I af,ar,*old=jt->rank,rv[2],wf,wr;
RZ(a&&w);
ar=AR(a);
rv[0]=l=efr(ar,l);
af=ar-l;
wr=AR(w);
rv[1]=r=efr(wr,r);
wf=wr-r;
if(!(af||wf))R CALL2(f2,a,w,fs);
ASSERT(!ICMP(AS(a),AS(w),MIN(af,wf)),EVLENGTH);
/* if(af&&wf&&af!=wf)R rank2ex(a,w,fs,l,r,f2); */
jt->rank=rv;
z=CALL2(f2,a,w,fs);
jt->rank=old;
R z;
}
A jtrank2ex(J jt,A a,A w,A fs,I lr,I rr,AF f2) {
PROLOG;
A y,y0,ya,yw,z;
B ab,b,wb;
C*u,*uu,*v,*vv;
I acn,acr,af,ak,ar,*as,at,k,mn,n=1,p,q,*s,wcn,wcr,wf,wk,wr,*ws,wt,yn,yr,*ys,yt;
RZ(a&&w);
at=AT(a);
wt=AT(w);
if(at&SPARSE||wt&SPARSE)R sprank2(a,w,fs,lr,rr,f2);
ar=AR(a);
as=AS(a);
acr=efr(ar,lr);
af=ar-acr;
ab=ARELATIVE(a);
wr=AR(w);
ws=AS(w);
wcr=efr(wr,rr);
wf=wr-wcr;
wb=ARELATIVE(w);
if(!af&&!wf)R CALL2(f2,a,w,fs);
RE(acn=prod(acr,as+af));
ak=acn*bp(at);
u=CAV(a)-ak;
NEWYA;
RE(wcn=prod(wcr,ws+wf));
wk=wcn*bp(wt);
v=CAV(w)-wk;
NEWYW;
b=af<=wf;
p=b?wf:af;
q=b?af:wf;
s=b?ws:as;
RE(mn=prod(p,s));
RE(n=prod(p-q,s+q));
ASSERT(!ICMP(as,ws,q),EVLENGTH);
if(AN(a))MOVEYA else RZ(ya=reshape(vec(INT,acr,as+af),filler(a)));
if(AN(w))MOVEYW else RZ(yw=reshape(vec(INT,wcr,ws+wf),filler(w)));
#define VALENCE 2
#define TEMPLATE 0
#include "cr_t.h"
}
