/**
* Runs computations and stores matrices based on given input
*/
void compute_engine(void) {
g_entries = calloc(MAX_ENTRIES, sizeof(entry*));
while (true) {
printf("> ");
char line[MAX_BUFFER];
if (fgets(line, MAX_BUFFER, stdin) == NULL) {
command_bye();
}
char command[MAX_BUFFER];
if (sscanf(line, "%s", command) != 1) {
printf("\n");
continue;
}
if (strcasecmp(command, "bye") == 0) {
command_bye();
} else if (strcasecmp(command, "help") == 0) {
command_help();
} else if (strcasecmp(command, "set") == 0) {
command_set(line);
} else if (strcasecmp(command, "show") == 0) {
command_show(line);
} else if (strcasecmp(command, "compute") == 0) {
command_compute(line);
} else {
puts("invalid command");
}
printf("\n");
}
}
int main(void) {
char line[MAX_LINE];
entry *entryHead; //head of entry list
snapshot *snapHead; //head of snapshot list
entryHead = NULL;
snapHead = NULL;
while (true) {
printf("> ");
if (fgets(line, MAX_LINE, stdin) == NULL) {
printf("\n");
command_bye(entryHead, snapHead);
return 0;
}
//get command from the input line as well as a second parameter if it exists
char *ptr = strtok(line, " ");
char firstToken[MAX_COMMAND]; //stores a command
strcpy(firstToken, ptr);
ptr = strtok(NULL, " ");
char secondToken[MAX_KEY]; //stores either a key or a second part of the command
secondToken[0] = '\0';
//get rid of a new line character if it exists in the last valid token entered
char *newLine;
if (ptr != NULL) {
strcpy(secondToken, ptr);
newLine = strchr(secondToken, '\n');
}
else {
newLine = strchr(firstToken, '\n');
}
if (newLine) {
*newLine = 0;
}
//identify the command and call the right function to execute the command entered
if (strcasecmp(firstToken, "BYE") == 0) {
command_bye(entryHead, snapHead);
return 0;
}
else if (strcasecmp(firstToken, "HELP") == 0) {
command_help();
}
else if (strcasecmp(firstToken, "LIST") == 0) {
if (strcasecmp(secondToken, "ENTRIES") == 0) {
list_entries(entryHead);
}
else if (strcasecmp(secondToken, "KEYS") == 0) {
list_keys(entryHead);
}
else if(strcasecmp(secondToken, "SNAPSHOTS") == 0) {
list_snapshots(snapHead);
}
else {
printf("unknown\n");
}
}
else if (strcasecmp(firstToken, "GET") == 0) {
get(secondToken, entryHead);
}
else if (strcasecmp(firstToken, "DEL") == 0) {
entryHead = del(entryHead, secondToken);
}
else if (strcasecmp(firstToken, "PURGE") == 0) {
entryHead = purge(secondToken, entryHead, snapHead);
}
else if (strcasecmp(firstToken, "SET") == 0) {
if (ptr != NULL && secondToken[0] != '\0') {
entryHead = set(ptr, secondToken, entryHead);
}
else {
printf("invalid input\n");
}
}
else if (strcasecmp(firstToken, "PUSH") == 0 || strcasecmp(firstToken, "APPEND") == 0) {
push_append(ptr, secondToken, entryHead, firstToken);
}
else if (strcasecmp(firstToken, "PICK") == 0) {
ptr = strtok(NULL, " ");
int index = atoi(ptr);
pick(index, secondToken, entryHead);
}
else if (strcasecmp(firstToken, "PLUCK") == 0) {
ptr = strtok(NULL, " ");
int index = atoi(ptr);
pluck(index, secondToken, entryHead);
}
else if (strcasecmp(firstToken, "POP") == 0) {
pluck(1, secondToken, entryHead);
}
else if (strcasecmp(firstToken, "DROP") == 0) {
snapHead = drop(snapHead, atoi(secondToken));
}
else if (strcasecmp(firstToken, "ROLLBACK") == 0) {
entryHead = checkout(atoi(secondToken), entryHead, snapHead);
snapHead = remove_snapshots(atoi(secondToken), snapHead);
}
else if (strcasecmp(firstToken, "CHECKOUT") == 0) {
entryHead = checkout(atoi(secondToken), entryHead, snapHead);
}
else if (strcasecmp(firstToken, "SNAPSHOT") == 0) {
snapHead = take_snapshot(entryHead, snapHead);
}
else if (strcasecmp(firstToken, "MIN") == 0) {
min(secondToken, entryHead);
}
else if (strcasecmp(firstToken, "MAX") == 0) {
max(secondToken, entryHead);
}
else if (strcasecmp(firstToken, "SUM") == 0) {
sum(secondToken, entryHead);
}
else if (strcasecmp(firstToken, "LEN") == 0) {
len(secondToken, entryHead);
}
else if (strcasecmp(firstToken, "REV") == 0) {
reverse(secondToken, entryHead);
}
else if (strcasecmp(firstToken, "UNIQ") == 0) {
unique(secondToken, entryHead);
}
else if (strcasecmp(firstToken, "SORT") == 0) {
sort(secondToken, entryHead);
}
else if (strcasecmp(firstToken, "DIFF") == 0) {
diff(ptr, secondToken, entryHead);
}
else if (strcasecmp(firstToken, "INTER") == 0) {
inter(ptr, secondToken, entryHead);
}
else if (strcasecmp(firstToken, "UNION") == 0) {
union_oper(ptr, secondToken, entryHead);
}
else {
printf("unknown\n");
}
printf("\n");
}
return 0;
}