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finder.c
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finder.c
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#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/wait.h>
int main(){
//Reading keys from decoder:
char mainDecoderFifo[] = "Main_Finder";
int fd = open(mainDecoderFifo, O_RDONLY);
char keys[1000];
int i = 0;
read(fd, &keys[i], sizeof(char));
while(keys[i] != '\0'){
i++;
read(fd, &keys[i], sizeof(char));
}
close(fd);
//reading from decoder:
char decoderFinderFifo[] = "Decoder_Finder";
int fd_decoder = open(decoderFinderFifo, O_RDONLY);
char str[10000];
i = 0;
read(fd_decoder, &str[i], sizeof(char));
while(str[i] != '\0'){
i++;
read(fd_decoder, &str[i], sizeof(char));
}
close(fd_decoder);
int wordCounter = 0;
for(int j = 0 ; j < strlen(keys) ; j++){
if(keys[j] == '$'){
wordCounter++;
}
}
wordCounter++;
char result[10000]= "";
//finding words:
int counter = 0;
int start = 0;
int end = 0;
for(int j = 0 ; j < strlen(keys) ; j++){
if(keys[j] == '$'){
end = j - 1;
char keyNumbers[10];
memcpy(keyNumbers,&keys[start],end-start+1);
int firstNumber,secondNumber;
sscanf(keyNumbers,"%d %d",&firstNumber,&secondNumber);
char values[secondNumber+2];
memcpy(values,&str[firstNumber],secondNumber);
values[secondNumber] = '=';
values[secondNumber+1] = '\0';
strcat(result,values);
start = j+1;
}
}
char keyNumbers[10];
memcpy(keyNumbers,&keys[start],strlen(keys)-start);
int firstNumber,secondNumber;
sscanf(keyNumbers,"%d %d",&firstNumber,&secondNumber);
char values[secondNumber+1];
memcpy(values,&str[firstNumber],secondNumber);
values[secondNumber] = '\0';
strcat(result,values);
char finderPlacerFifo[] = "Finder_Placer";
mkfifo(finderPlacerFifo, 0666);
int fd_placer = open(finderPlacerFifo,O_WRONLY);
write(fd_placer, result , strlen(result)+1);
close(fd_placer);
while(wait(NULL) > 0);
return 0;
}