Adding asencode utility. Not part of the default build.

config/asencode.cpp

@@ -0,0 +1,154 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is the AppleSingle decoder.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2002
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *  Johnny Stenback <jst@mozilla.org>  (Original author)
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#define EXIT_IF_FALSE(x)                                                      \
+  do {                                                                        \
+    if (!(x)) {                                                               \
+      printf("Assertion failure: %s\n"                                        \
+             "  at %s line %d\n",                                             \
+             #x, __FILE__, __LINE__);                                         \
+      exit(1);                                                                \
+    }                                                                         \
+  } while (0)
+
+// encodes a file with data and resource forks into a single
+// AppleSingle encoded file..
+
+static void append_file(FILE* output, const char* input_name)
+{
+  FILE* input = fopen(input_name, "rb");
+  EXIT_IF_FALSE(input != NULL);
+
+  while (1) {
+    char buffer[4096];
+    size_t amount = fread(buffer, 1, sizeof(buffer), input);
+    if (amount == 0) {
+      EXIT_IF_FALSE(feof(input) != 0);
+      break;
+    }
+    fwrite(buffer, 1, amount, output);
+  }
+  fclose(input);
+}
+
+int main(int argc, char** argv)
+{
+  if (argc < 3) {
+    printf("usage: %s input output\n", argv[0]);
+    exit(1);
+  }
+
+  const char *input_name = argv[1];
+
+  struct stat input_st;
+  if (stat(input_name, &input_st) != 0) {
+    printf("%s: can't open file `%s'\n", argv[0], input_name);
+    exit(2);
+  }
+
+  if ((input_st.st_mode & S_IFMT) != S_IFREG) {
+    printf("%s: file `%s' not a regular file\n", argv[0], input_name);
+    exit(3);
+  }
+
+  char rez_name[512];
+  strcpy(rez_name, input_name);
+  strcat(rez_name, "/rsrc");
+
+  struct stat rez_st;
+  EXIT_IF_FALSE(stat(rez_name, &rez_st) == 0);
+
+  if (rez_st.st_size == 0) {
+    printf("%s: no resource fork found on file `%s'\n", argv[0], argv[1]);
+    exit(4);
+  }
+
+  FILE* output = fopen(argv[2], "wb");
+  if (output == NULL) {
+    printf("%s: can't open file `%s'\n", argv[0], argv[2]);
+    exit(5);
+  }
+
+  struct header {
+    int magic_number;
+    int version_number;
+    char filler[16];
+  } header;
+
+  header.magic_number = 0x00051600;
+  header.version_number = 0x00020000;
+
+  EXIT_IF_FALSE(fwrite(&header, sizeof(header), 1, output) == 1);
+
+  short entry_count = 2;
+  EXIT_IF_FALSE(fwrite(&entry_count, sizeof(entry_count), 1, output) == 1);
+
+  struct entry {
+    unsigned int id;
+    unsigned int offset;
+    unsigned int length;
+  };
+
+  entry entries[2];
+
+  int header_end = sizeof(header) + sizeof(entry_count) + sizeof(entries);
+
+  entries[0].id = 1; // data fork
+  entries[0].offset = header_end;
+  entries[0].length = input_st.st_size;
+
+  entries[1].id = 2; // data fork
+  entries[1].offset = header_end + input_st.st_size;
+  entries[1].length = rez_st.st_size;
+
+  EXIT_IF_FALSE(fwrite(entries, sizeof(entry), 2, output) == 2);
+
+  append_file(output, input_name);
+  append_file(output, rez_name);
+
+  fclose(output);
+
+  return 0;
+}