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#include <vm.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
typedef enum CommandType {
ExitSession,
PrintStack,
} CommandType;
typedef struct Command {
CommandType type;
} Command;
static bool read_command(char line[], Command* pCmd) {
static const char* delim = " \n";
const char* cmd = strtok(line, delim);
if (strcmp(cmd, "exit") == 0) {
*pCmd = (Command){.type = ExitSession};
return true;
} else if (strcmp(cmd, "print_stack") == 0) {
*pCmd = (Command){.type = PrintStack};
return true;
}
return false;
}
/// Runs a command.
///
/// Returns true unless on ExitSession.
static bool run_command(Vm* vm, Command cmd) {
switch (cmd.type) {
case ExitSession:
return false;
case PrintStack:
vm_print_stack(vm);
break;
}
return true;
}
int main() {
Vm* vm = vm_new();
if (!vm) {
fprintf(stderr, "Failed to create VM\n");
return 1;
}
Command cmd;
bool should_continue = true;
char line[128];
while (should_continue && fgets(line, sizeof(line), stdin)) {
if (read_command(line, &cmd)) {
should_continue = run_command(vm, cmd);
} else {
fprintf(stderr, "Unknown command\n");
}
}
vm_del(&vm);
return 0;
}
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