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Finished Topic-11

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Sergiusz Warga 2021-05-19 16:17:49 +02:00
parent 6bb9ef9b20
commit 0dc2c63492
1 changed files with 26 additions and 7 deletions
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33
Topic-11/server.c
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@ -19,7 +19,7 @@ void handle_arguments(int argc, char *argv[]) {
struct TokenizedQuerry tokenize(const char *querry) { struct TokenizedQuerry tokenize(const char *querry) {
struct TokenizedQuerry tokenized_querry; struct TokenizedQuerry tokenized_querry;
printf("QUERRY: %s\n", querry); // printf("QUERRY: %s\n", querry);
char left[50], *operand_ptr, right[50]; char left[50], *operand_ptr, right[50];
char valid_operands[4] = {'+', '-', '/', '*'}; char valid_operands[4] = {'+', '-', '/', '*'};
for (int i = 0; i < sizeof(valid_operands); ++i) { for (int i = 0; i < sizeof(valid_operands); ++i) {
@ -34,13 +34,29 @@ struct TokenizedQuerry tokenize(const char *querry) {
strncpy(left, querry, left_length); strncpy(left, querry, left_length);
strcpy(right, querry + left_length + 1); strcpy(right, querry + left_length + 1);
printf("Tokenized: %s %c %s\n", left, *operand_ptr, right); // printf("Tokenized: %s %c %s\n", left, *operand_ptr, right);
tokenized_querry.left = strtol(left, NULL, 10); tokenized_querry.left = strtol(left, NULL, 10);
tokenized_querry.operand = *operand_ptr; tokenized_querry.operand = *operand_ptr;
tokenized_querry.right = strtol(right, NULL, 10);
return tokenized_querry; return tokenized_querry;
} }
int calculate_TokenizedQuerry(struct TokenizedQuerry expression) {
switch (expression.operand) {
case '+':
return expression.left + expression.right;
case '-':
return expression.left - expression.right;
case '*':
return expression.left * expression.right;
case '/':
return expression.left / expression.right;
}
return 0;
}
void run_server(int port) { void run_server(int port) {
int sockfd = socket(AF_INET, SOCK_DGRAM, 0); int sockfd = socket(AF_INET, SOCK_DGRAM, 0);
if (sockfd < 0) { if (sockfd < 0) {
@ -61,16 +77,19 @@ void run_server(int port) {
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
char buffer[100]; size_t buffer_size = 100;
memset(&buffer, 0, sizeof(buffer)); char buffer[buffer_size];
memset(&buffer, 0, buffer_size);
socklen_t client_addr_len; socklen_t client_addr_len;
struct TokenizedQuerry tokenized_querry; struct TokenizedQuerry tokenized_querry;
while (1) { while (1) {
rv = recvfrom(sockfd, buffer, sizeof(buffer), 0, (struct sockaddr *)&client_addr, &client_addr_len); rv = recvfrom(sockfd, buffer, buffer_size, 0, (struct sockaddr *)&client_addr, &client_addr_len);
tokenized_querry = tokenize(buffer); tokenized_querry = tokenize(buffer);
int result = calculate_TokenizedQuerry(tokenized_querry);
//rv = sendto(sockfd, response, sizeof(response), 0, (const struct sockaddr *)&client_addr, sizeof(client_addr)); memset(&buffer, 0, buffer_size);
snprintf(buffer, buffer_size, "%d", result);
rv = sendto(sockfd, buffer, sizeof(buffer), 0, (const struct sockaddr *)&client_addr, sizeof(client_addr));
memset(&buffer, 0, sizeof(buffer)); memset(&buffer, 0, sizeof(buffer));
} }