Diff: cmd/mruby.cpp

Revision:

0:4bb480aaa402

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cmd/mruby.cpp	Wed Mar 25 18:25:34 2015 +0000
@@ -0,0 +1,252 @@
+#include "mbed.h"
+#include "SDFileSystem.h"
+ 
+extern SDFileSystem sd;
+extern Serial pc;
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "mruby.h"
+#include "mruby/array.h"
+#include "mruby/compile.h"
+#include "mruby/dump.h"
+#include "mruby/variable.h"
+#include "cmd.h"
+
+#ifndef ENABLE_STDIO
+static void
+p(mrb_state *mrb, mrb_value obj)
+{
+  obj = mrb_funcall(mrb, obj, "inspect", 0);
+  fwrite(RSTRING_PTR(obj), RSTRING_LEN(obj), 1, stdout);
+  putc('\n', stdout);
+}
+#else
+#define p(mrb,obj) mrb_p(mrb,obj)
+#endif
+
+void mrb_show_version(mrb_state *);
+void mrb_show_copyright(mrb_state *);
+
+struct _args {
+  FILE *rfp;
+  char* cmdline;
+  mrb_bool fname        : 1;
+  mrb_bool mrbfile      : 1;
+  mrb_bool check_syntax : 1;
+  mrb_bool verbose      : 1;
+  int argc;
+  char** argv;
+};
+
+static void
+usage(const char *name)
+{
+  static const char *const usage_msg[] = {
+  "switches:",
+  "-b           load and execute RiteBinary (mrb) file",
+  "-c           check syntax only",
+  "-e 'command' one line of script",
+  "-v           print version number, then run in verbose mode",
+  "--verbose    run in verbose mode",
+  "--version    print the version",
+  "--copyright  print the copyright",
+  NULL
+  };
+  const char *const *p = usage_msg;
+
+  printf("Usage: %s [switches] programfile\n", name);
+  while (*p)
+    printf("  %s\n", *p++);
+}
+
+static int
+parse_args(mrb_state *mrb, int argc, char **argv, struct _args *args)
+{
+  char **origargv = argv;
+  static const struct _args args_zero = { 0 };
+
+  *args = args_zero;
+
+  for (argc--,argv++; argc > 0; argc--,argv++) {
+    char *item;
+    if (argv[0][0] != '-') break;
+
+    if (strlen(*argv) <= 1) {
+      argc--; argv++;
+      args->rfp = stdin;
+      break;
+    }
+
+    item = argv[0] + 1;
+    switch (*item++) {
+    case 'b':
+      args->mrbfile = TRUE;
+      break;
+    case 'c':
+      args->check_syntax = TRUE;
+      break;
+    case 'e':
+      if (item[0]) {
+        goto append_cmdline;
+      }
+      else if (argc > 1) {
+        argc--; argv++;
+        item = argv[0];
+append_cmdline:
+        if (!args->cmdline) {
+          size_t buflen;
+          char *buf;
+
+          buflen = strlen(item) + 1;
+          buf = (char *)mrb_malloc(mrb, buflen);
+          memcpy(buf, item, buflen);
+          args->cmdline = buf;
+        }
+        else {
+          size_t cmdlinelen;
+          size_t itemlen;
+
+          cmdlinelen = strlen(args->cmdline);
+          itemlen = strlen(item);
+          args->cmdline =
+            (char *)mrb_realloc(mrb, args->cmdline, cmdlinelen + itemlen + 2);
+          args->cmdline[cmdlinelen] = '\n';
+          memcpy(args->cmdline + cmdlinelen + 1, item, itemlen + 1);
+        }
+      }
+      else {
+        printf("%s: No code specified for -e\n", *origargv);
+        return EXIT_SUCCESS;
+      }
+      break;
+    case 'v':
+//      if (!args->verbose) mrb_show_version(mrb);
+      args->verbose = TRUE;
+      break;
+    case '-':
+      if (strcmp((*argv) + 2, "version") == 0) {
+//        mrb_show_version(mrb);
+        exit(EXIT_SUCCESS);
+      }
+      else if (strcmp((*argv) + 2, "verbose") == 0) {
+        args->verbose = TRUE;
+        break;
+      }
+      else if (strcmp((*argv) + 2, "copyright") == 0) {
+//        mrb_show_copyright(mrb);
+        exit(EXIT_SUCCESS);
+      }
+    default:
+      return EXIT_FAILURE;
+    }
+  }
+
+  if (args->rfp == NULL && args->cmdline == NULL) {
+    if (*argv == NULL) args->rfp = stdin;
+    else {
+      args->rfp = fopen(argv[0], args->mrbfile ? "rb" : "r");
+      if (args->rfp == NULL) {
+        printf("%s: Cannot open program file. (%s)\n", *origargv, *argv);
+        return EXIT_FAILURE;
+      }
+      args->fname = TRUE;
+      args->cmdline = argv[0];
+      argc--; argv++;
+    }
+  }
+  args->argv = (char **)mrb_realloc(mrb, args->argv, sizeof(char*) * (argc + 1));
+  memcpy(args->argv, argv, (argc+1) * sizeof(char*));
+  args->argc = argc;
+
+  return EXIT_SUCCESS;
+}
+
+static void
+cleanup(mrb_state *mrb, struct _args *args)
+{
+  if (args->rfp && args->rfp != stdin)
+    fclose(args->rfp);
+  if (args->cmdline && !args->fname)
+    mrb_free(mrb, args->cmdline);
+  if (args->argv)
+    mrb_free(mrb, args->argv);
+  mrb_close(mrb);
+}
+
+int
+cmd_mruby(int argc, char **argv)
+{
+  mrb_state *mrb = mrb_open();
+  int n = -1;
+  int i;
+  struct _args args;
+  mrb_value ARGV;
+  mrbc_context *c;
+  mrb_value v;
+  mrb_sym zero_sym;
+
+  if (mrb == NULL) {
+    fputs("Invalid mrb_state, exiting mruby\n", stderr);
+    return EXIT_FAILURE;
+  }
+
+  n = parse_args(mrb, argc, argv, &args);
+  if (n == EXIT_FAILURE || (args.cmdline == NULL && args.rfp == NULL)) {
+    cleanup(mrb, &args);
+    usage(argv[0]);
+    return n;
+  }
+
+  ARGV = mrb_ary_new_capa(mrb, args.argc);
+  for (i = 0; i < args.argc; i++) {
+    mrb_ary_push(mrb, ARGV, mrb_str_new_cstr(mrb, args.argv[i]));
+  }
+  mrb_define_global_const(mrb, "ARGV", ARGV);
+
+  c = mrbc_context_new(mrb);
+  if (args.verbose)
+    c->dump_result = TRUE;
+  if (args.check_syntax)
+    c->no_exec = TRUE;
+
+  /* Set $0 */
+  zero_sym = mrb_intern_lit(mrb, "$0");
+  if (args.rfp) {
+    const char *cmdline;
+    cmdline = args.cmdline ? args.cmdline : "-";
+    mrbc_filename(mrb, c, cmdline);
+    mrb_gv_set(mrb, zero_sym, mrb_str_new_cstr(mrb, cmdline));
+  }
+  else {
+    mrbc_filename(mrb, c, "-e");
+    mrb_gv_set(mrb, zero_sym, mrb_str_new_lit(mrb, "-e"));
+  }
+
+  /* Load program */
+  if (args.mrbfile) {
+    v = mrb_load_irep_file_cxt(mrb, args.rfp, c);
+  }
+  else if (args.rfp) {
+    v = mrb_load_file_cxt(mrb, args.rfp, c);
+  }
+  else {
+    v = mrb_load_string_cxt(mrb, args.cmdline, c);
+  }
+
+  mrbc_context_free(mrb, c);
+  if (mrb->exc) {
+    if (!mrb_undef_p(v)) {
+      mrb_print_error(mrb);
+    }
+    n = -1;
+  }
+  else if (args.check_syntax) {
+    printf("Syntax OK\n");
+  }
+  cleanup(mrb, &args);
+
+  return n == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
+}
+