125 lines
2.4 KiB
C
125 lines
2.4 KiB
C
#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/socket.h>
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#include <errno.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <stdio.h>
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#include <ctype.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#ifdef linux
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#include <compat.h>
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#endif
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short mult[] = {2,2,4,8,16,32,64,128};
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short base[] = {1,33,66,132,264,528,1056,2112,4032};
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uchar_t val[256];
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static int clientsock(char *host, int port);
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int main(int argc, char *argv[])
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{
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short shift;
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short i,j,k,v;
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short fi = 0;
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if(argc < 2) {
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fprintf(stderr,"Usage: %s <shift> < a-law-file > MacSample\n",*argv);
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exit(2);
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}
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shift = atoi(*++argv);
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if(argc > 2) {
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char *host = *++argv;
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ushort num = 65430;
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if(argc > 3)
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num = atoi(*++argv);
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fi = clientsock(host,num); if(fi < 0) { perror("Open"); exit(1); }
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}
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for (i=0;i<=7;i++) {
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for(j=0;j<=15;j++) {
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k=(i<<4)+j;
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if(shift >= 0)
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v=((base[i]+(mult[i]*j)) >>shift);
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else
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v=k;
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if(v>127) v=127;
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val[k] = 128+v;
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val[255-k]=127-v;
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}
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}
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{
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uchar_t arr[10240];
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int len1;
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while((len1=read(fileno(stdin),arr,sizeof arr))>0) {
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uchar_t *arp = arr+len1;
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int len2 = 0;
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while(--arp >= arr)
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*arp = val[*arp];
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arp++;
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while(len1>0 && (len2=write(fi?fi:fileno(stdout),arp,len1))>0) {
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arp += len2;
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len1 -= len2;
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}
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if(len2<0) {
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perror("Write");
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exit(1);
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} else if(len2 == 0)
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exit(0);
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}
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if(len1<0) {
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perror("Read");
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exit(1);
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}
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}
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exit(0);
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}
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#ifndef FD_SET /* for 4.2BSD */
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#define FD_SETSIZE (sizeof(fd_set) * 8)
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#define FD_SET(n, p) (((fd_set *) (p))->fds_bits[0] |= (1 << ((n) % 32)))
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#define FD_CLR(n, p) (((fd_set *) (p))->fds_bits[0] &= ~(1 << ((n) % 32)))
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#define FD_ISSET(n, p) (((fd_set *) (p))->fds_bits[0] & (1 << ((n) % 32)))
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#define FD_ZERO(p) bzero((char *)(p), sizeof(*(p)))
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#endif
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static int clientsock(char *host, int port)
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{
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int sock;
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struct sockaddr_in server;
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struct hostent *hp, *gethostbyname();
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bzero(&server, sizeof(server));
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server.sin_family = AF_INET;
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server.sin_port = htons(port);
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if (isdigit(host[0]))
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server.sin_addr.s_addr = inet_addr(host);
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else
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{
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hp = gethostbyname(host);
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if (hp == NULL)
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return -9999;
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bcopy(hp->h_addr, &server.sin_addr, hp->h_length);
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}
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sock = socket(AF_INET, SOCK_STREAM, 0);
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if (sock < 0)
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return -errno;
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if (connect(sock, (struct sockaddr *)&server, sizeof(server)) < 0)
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{
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close(sock);
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return -errno;
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}
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return sock;
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}
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