feat: enhance compiler

- Add comments and test for it
- Add semicolon as required end of some expressions
- Add new arguments parser
- Add multi-file compilation
- Add colors in output

src/compiler/utils/fzl_options.c

@@ -0,0 +1,131 @@
+#include <common/fzl_colors.h>
+#include <compiler/utils/fzl_options.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+const char version[] = "FZL Compiler 1.0";
+
+void print_help()
+{
+  printf("Usage: fzc [flags] <sources...>\n");
+  printf("Available flags:\n");
+  printf("\t-h\t--help\t\tPrint help\n");
+  printf("\t-v\t--verbose\tDisplay compilation info (tokens, AST, consts "
+         "table, etc)\n");
+  printf("\t-V\t--version\tPrint compiler version\n");
+  printf("\t-o\t--out\t\tSet compiled file name\n");
+}
+
+fzl_options_t *fzl_mkoptions(int argc, char **argv)
+{
+  fzl_options_t *opts = malloc(sizeof(fzl_options_t));
+  if (!opts)
+  {
+    printf("%sBruh... Potato PC%s\n", FZL_CERROR, FZL_CRST);
+    return NULL;
+  }
+
+  memset(opts, 0, sizeof(fzl_options_t));
+
+  if (argc < 2)
+  {
+    print_help();
+    opts->should_continue = false;
+    return opts;
+  }
+
+  size_t i;
+  for (i = 1; i < argc; i++)
+  {
+    if (argv[i][0] != '-')
+      break;
+
+    if (strcmp(argv[i], "-h") == 0 || strcmp(argv[i], "--help") == 0)
+    {
+      print_help();
+      opts->should_continue = false;
+      break;
+    }
+    else if (strcmp(argv[i], "-V") == 0 || strcmp(argv[i], "--version") == 0)
+    {
+      printf("%s\n", version);
+      opts->should_continue = false;
+      break;
+    }
+    else if (strcmp(argv[i], "-v") == 0 || strcmp(argv[i], "--verbose") == 0)
+    {
+      opts->verbose = true;
+    }
+    else if (strcmp(argv[i], "-o") == 0 || strcmp(argv[i], "--out") == 0)
+    {
+      if (i == argc - 1)
+      {
+        printf("%sError%s: missing out file name\n", FZL_CERROR, FZL_CRST);
+        free(opts);
+        return NULL;
+      }
+
+      char *filename = argv[++i];
+      opts->outname  = filename;
+    }
+    else
+    {
+      printf("%sError%s: undefined flag '%s'\n", FZL_CERROR, FZL_CRST, argv[i]);
+      free(opts);
+      return NULL;
+    }
+  }
+
+  size_t fremainder = 2;
+  size_t fcount     = 0;
+  char **files      = malloc(fremainder * sizeof(char *));
+
+  for (; i < argc; i++)
+  {
+    if (argv[i][0] == '-')
+    {
+      printf(
+          "%sWarning%s: unhandled flag '%s' (should be defined before sources "
+          "list)\n",
+          FZL_CWARNING, FZL_CRST, argv[i]);
+      continue;
+    }
+
+    if (fremainder <= fcount)
+    {
+      fremainder *= 2;
+      files = realloc(files, fremainder * sizeof(char *));
+    }
+
+    files[fcount++] = argv[i];
+  }
+
+  opts->files       = files;
+  opts->files_count = fcount;
+
+  if (i < argc - 1)
+  {
+    printf("%sError%s: flags should go before source files list.\n", FZL_CERROR,
+           FZL_CRST);
+    printf("Remain %zu arguments are not handled.\n", argc - 1 - i);
+
+    free(files);
+    free(opts);
+    return NULL;
+  }
+
+  opts->should_continue = true;
+  return opts;
+}
+
+void fzl_freeoptions(fzl_options_t *options)
+{
+  if (!options)
+    return;
+
+  if (options->files)
+    free(options->files);
+
+  free(options);
+}