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Send job and receive answer in client mode.

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tim.schubert@tu-bs.de 2016-10-27 21:22:15 +02:00
parent 85a5452600
commit 71aa81ef00
1 changed files with 54 additions and 6 deletions
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54
netcalc.c
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@ -229,18 +229,66 @@ int connectclient(struct addrinfo *ainfo)
return 0;
}
int base(char *num)
{
size_t len = strlen(num);
char *num_cpy;
if (sscanf(num, "%m[0-9]", &num_cpy) == 1 && strtoul(num_cpy, NULL, 10) < UINT_MAX) { // dec
return 10;
} else if (sscanf(num, "%m[0-1]b", &num_cpy) == 1 && strtoul(num_cpy, NULL, 2) < UINT_MAX) { // bin
return 2;
} else if (sscanf(num, "%m[0-1]b", &num_cpy) == 1 && strtoul(num_cpy, NULL, 2) < UINT_MAX) { // hex
return 16;
} else {
return 0;
}
}
int client()
{
char sendbuf[512];
char buf[BUFLEN];
size_t nullsize = 0;
char *line = NULL;
while (getline(&line, &nullsize, stdin) != -1) {
char *num1 = NULL;
char *num2 = NULL;
char *op = NULL;
while (scanf("%m[0-9,A-F,x,b]%m[+,-,*,/]%m[0-9,A-F,x,b]", &num1, &op, &num2)) {
//fprintf(stdout, "%s %s %s\n", num1, op, num2);
ssize_t num_items = sscanf(line, "%m[0-9,A-F,x,b]%m[+,-,*,/]%m[x,0-9,A-F,b]", &num1, &op, &num2);
printf("debug: %lu items read from %s", num_items, line);
if (num_items == 3 && (base(num1) == 0 || base(num2) == 0)) {
fprintf(stderr, "base: illegal input");
} else if (num_items == 1 && num1 != NULL) {
op = "+";
num2 = "0";
} else if (num_items < 3) {
fprintf(stderr, "too few arguments");
} else { // send input
printf("debug: sending %s", line);
}
if (send(SOCKFD, line, strlen(line), 0) == -1) {
perror("recv");
continue;
}
free(num1);
free(num2);
free(op);
free(line);
line = NULL; // so getline allocates a buffer for us
memset(buf, 0, BUFLEN);
ssize_t re_bytes_c = recv(SOCKFD, buf, sizeof buf, 0);
if (re_bytes_c == -1) {
perror("recv");
continue;
}
printf("%s", buf);
}
return -1;
}
int main(int argc, char *argv[])