Initial commit.HEADmain

1 files changed, 65 insertions, 0 deletions

diff --git a/vmrun/src/main.c b/vmrun/src/main.c
new file mode 100644
index 0000000..0bdd16f
--- /dev/null
+++ b/vmrun/src/main.c
@@ -0,0 +1,65 @@
+#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;
+}