feat: implement vm

src/vm/main.c

@@ -0,0 +1,90 @@
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <vm/fzl_vm.h>
+
+typedef struct
+{
+  char *filepath;
+  bool help;
+} run_args_t;
+
+void print_hint()
+{
+  printf("Usage: fz [flags] <file path>\n");
+  printf("Flags:\n");
+  printf("\tno flags available yet :(\n");
+}
+
+// Parse passed arguments and build args setup structure
+run_args_t *parse_args(int argc, char **argv)
+{
+  if (argc < 2)
+  {
+    print_hint();
+    return NULL;
+  }
+
+  run_args_t *args = malloc(sizeof(run_args_t));
+  args->filepath = NULL;
+  args->help = false;
+
+  for (size_t i = 0; i < argc; i++)
+  {
+    if (argv[i][0] != '-')
+      continue;
+
+    if (strcmp(argv[i], "-h") == 0 || strcmp(argv[i], "--help") == 0)
+    {
+      args->help = true;
+      return args;
+    }
+    else
+    {
+      printf("Error: unknown flag '%s'.\n", argv[i]);
+      printf("Use 'fz --help' to read the usage\n");
+      return NULL;
+    }
+  }
+
+  if (argv[argc - 1][0] == '-')
+  {
+    printf("Error: last argument MUST be a file path\n");
+    printf("Use 'fz --help' for help\n");
+    return NULL;
+  }
+
+  args->filepath = argv[argc - 1];
+
+  return args;
+}
+
+int main(int argc, char **argv)
+{
+  run_args_t *args = parse_args(argc, argv);
+  if (!args)
+  {
+    return -1;
+  }
+
+  fzl_vm_t *vm = fzl_mkvm(args->filepath);
+  if (!vm)
+  {
+    printf("Error: %s\n", fzl_vm_geterror());
+    return -1;
+  }
+
+  int result = fzl_vm_run(vm);
+  if (result != 0)
+  {
+    printf("Error: %s\n", fzl_vm_geterror());
+    return -1;
+  }
+
+  free(args);
+  fzl_freevm(vm);
+
+  return 0;
+}