parse date string
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0a2de4e86a
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2ffbdcea7f
50
src/main.c
50
src/main.c
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@ -35,36 +35,55 @@ int parse_message(struct Message* result, char* message) {
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if (strlen(message) < 3) return 1;
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// Must start with <
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if (message[0] != '<') return 1;
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printf("%lu\n", strlen(message));
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// const char delim = " "
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char digits[] = "\0\0\0";
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int num_digits = 0;
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int position = 1;
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//bool found_priority_end = false; // TODO
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while (position < 4) {
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printf("inspecting %c\n", message[position]);
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if(!isdigit(message[position])) return 1; // priority must be numeric
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digits[num_digits] = message[position];
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num_digits++;
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position++;
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if (message[position] == '>') {
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position++; // Now sits on the first character of the ISOTIMESTAMP
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break;
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}
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// break;
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}
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if (num_digits == 0) return 1; // empty priority >< ?
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printf("found digits %d, aka %d\n", atoi(digits), atoi(digits)/2);
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// result = Message{atoi(digits)};
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if (num_digits == 0) return 1; // empty priority <> ?
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result->priority = atoi(digits);
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// assert(0);
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// *strtok(char *str, const char *delim)
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// Parse date
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char month[8];
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memset(&month, '\0', sizeof(month)); // makes valgrind happy as the above char contains uninitialized memory
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int day=0, hour=0, minute=0, second=0;
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{
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int msg_len = strlen(message);
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char message_fromdate[4096];
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memset(&message_fromdate, '\0', sizeof(message_fromdate));
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memcpy(message_fromdate, &message[position], msg_len - position);
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if(sscanf(message_fromdate, "%s %d %d:%d:%d", month, &day, &hour, &minute, &second) != 5) {
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return 1;
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}
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} // frees message_fromdate, but is this pointless?
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// Advance position by finding the length of the date
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char datestr[24];
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int date_length = sprintf(datestr, "%s %d %02d:%02d:%02d", month, day, hour, minute, second);
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assert(date_length > 0);
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position += date_length + 1; // position now at beginning of HOSTNAME field
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char msg_remaining[4096];
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memset(&msg_remaining, '\0', sizeof(msg_remaining));
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memcpy(msg_remaining, &message[position], strlen(message) - position);
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printf("'%s'\n", msg_remaining);
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return 0;
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}
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int main(int argc, char** argv) {
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int sock_fd;
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struct sockaddr_in my_addr, my_peer_addr;
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@ -72,7 +91,7 @@ int main(int argc, char** argv) {
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unsigned int portl;
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unsigned short port;
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int size_recvd;
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char msg[1024];
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char msg[4096];
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socklen_t addrlen;
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if (argc != 2) {
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@ -115,6 +134,7 @@ int main(int argc, char** argv) {
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&addrlen /* length of buffer to receive peer info */
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)) < 0)
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panic("recvfrom");
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assert(size_recvd < sizeof(msg)); // messages can't be longer than our buffer
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assert(addrlen == sizeof(struct sockaddr_in));
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@ -123,7 +143,9 @@ int main(int argc, char** argv) {
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// inet_ntoa(my_peer_addr.sin_addr), ntohs(my_peer_addr.sin_port), size_recvd, msg);
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struct Message result;
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// printf("XXXsize: %lu", sizeof(result)); // curious how big the struct gets
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if(parse_message(&result, msg)) {
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//printf("msg[size_recvd] is: %d", msg[size_recvd]);
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msg[size_recvd] = '\0'; // We receive 1 full string at a time
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if(parse_message(&result, msg) != 1) {
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printf("message is valid, priority %d\n", result.priority);
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}
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}
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