Add disk label reading tool

.gitignore

@@ -3,4 +3,5 @@ UDK
 Binaries
 Tools/EfiResTool/EfiResTool
 Tools/AppleEfiSignTool/AppleEfiSignTool
+Tools/readlabel/readlabel
 *.o

Tools/readlabel/Makefile

@@ -0,0 +1,13 @@
+CC ?= gcc
+CFLAGS=-c -Wall -Wextra -pedantic -O3
+
+all: readlabel
+
+readlabel: readlabel.o
+	$(CC) readlabel.o -o readlabel
+
+.c:
+	$(CC) $(CFLAGS) $< -o $@
+
+clean:
+	rm -rf *.o readlabel

Tools/readlabel/readlabel.c

@@ -0,0 +1,165 @@
+/** @file
+
+Read macOS .disk_label (.disk_label_2x) file and convert to .ppm.
+Reference: http://refit.sourceforge.net/info/vollabel.html
+
+Copyright (c) 2019, vit9696
+
+All rights reserved.
+
+This program and the accompanying materials
+are licensed and made available under the terms and conditions of the BSD License
+which accompanies this distribution.  The full text of the license may be found at
+http://opensource.org/licenses/bsd-license.php
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+static uint8_t palette[256] = {
+  [0x00] = 255,
+  [0xf6] = 238,
+  [0xf7] = 221,
+  [0x2a] = 204,
+  [0xf8] = 187,
+  [0xf9] = 170,
+  [0x55] = 153,
+  [0xfa] = 136,
+  [0xfb] = 119,
+  [0x80] = 102,
+  [0xfc] = 85,
+  [0xfd] = 68,
+  [0xab] = 51,
+  [0xfe] = 34,
+  [0xff] = 17,
+  [0xd6] = 0
+};
+
+static int read_file(const char *filename, uint8_t **buffer, size_t *size) {
+  FILE *fh = fopen(filename, "rb");
+  if (!fh) {
+    fprintf(stderr, "Missing file %s!\n", filename);
+    return -1;
+  }
+
+  if (fseek(fh, 0, SEEK_END)) {
+    fprintf(stderr, "Failed to find end of %s!\n", filename);
+    fclose(fh);
+    return -1;
+  }
+
+  long pos = ftell(fh);
+
+  if (pos <= 0) {
+    fprintf(stderr, "Invalid file size (%ld) of %s!\n", pos, filename);
+    fclose(fh);
+    return -1;
+  }
+
+  if (fseek(fh, 0, SEEK_SET)) {
+    fprintf(stderr, "Failed to rewind %s!\n", filename);
+    fclose(fh);
+    return -1;
+  }
+
+  *size = (size_t)pos;
+  *buffer = (uint8_t *)malloc(*size);
+
+  if (!*buffer) {
+    fprintf(stderr, "Failed to allocate %zu bytes for %s!\n", *size, filename);
+    fclose(fh);
+    return -1;
+  }
+
+  if (fread(*buffer, *size, 1, fh) != 1) {
+    fprintf(stderr, "Failed to read %zu bytes from %s!\n", *size, filename);
+    fclose(fh);
+    free(*buffer);
+    return -1;
+  }
+
+  fclose(fh);
+  return 0;
+}
+
+static int write_ppm(const char *filename, size_t width, size_t height, uint8_t *pixel) {
+  FILE *fh = fopen(filename, "wb");
+  if (!fh) {
+    fprintf(stderr, "Failed to open out file %s!\n", filename);
+    return -1;
+  }
+
+  if (fprintf(fh, "P6\n%zu %zu\n255\n", width, height) < 0) {
+    fprintf(stderr, "Failed to write ppm header to %s!\n", filename);
+    fclose(fh);
+    return -1;
+  }
+
+  for (size_t y = 0; y < height; ++y) {
+    for (size_t x = 0; x < width; ++x) {
+      uint8_t col[3];
+      col[0] = col[1] = col[2] = palette[*pixel];
+      if (fwrite(col, sizeof(col), 1, fh) != 1) {
+        fprintf(stderr, "Failed to write ppm pixel %zux%zu to %s!\n", x, y, filename);
+        fclose(fh);
+        return -1;
+      }
+      ++pixel;
+    }
+  }
+
+  fclose(fh);
+
+  return 0;
+}
+
+int main(int argc, char *argv[]) {
+  if (argc < 3) {
+    fprintf(stderr, "Pass file and outfile!\n");
+    return -1;
+  }
+
+  uint8_t *buffer;
+  size_t size;
+
+  if (read_file(argv[1], &buffer, &size)) {
+    return -1;
+  }
+
+  size_t header_size = sizeof(uint8_t) + sizeof(uint16_t)*2;
+
+  if (size < header_size) {
+    fprintf(stderr, "Too low size %zu!\n", size);
+    free(buffer);
+    return -1;
+  }
+
+  if (buffer[0] != 1) {
+    fprintf(stderr, "Invalid magic %02X!\n", buffer[0]);
+    free(buffer);
+    return -1;
+  }
+
+  size_t width = ((size_t) buffer[1] << 8U) | (size_t) buffer[2];
+  size_t height = ((size_t) buffer[3] << 8U) | (size_t) buffer[4];
+
+  if (width * height == 0 || size - header_size != width*height) {
+    fprintf(stderr, "Image mismatch %zux%zu with size %zu!\n", width, height, size);
+    free(buffer);
+    return -1;
+  }
+
+  (void)remove(argv[2]);
+
+  if (write_ppm(argv[2], width, height, buffer + header_size)) {
+    free(buffer);
+    return -1;
+  }
+
+  free(buffer);
+  return 0;
+}

macbuild.tool

@@ -96,6 +96,7 @@ if [ ! -d "Binaries" ]; then
   cd Binaries || exit 1
   ln -s ../UDK/Build/AppleSupportPkg/RELEASE_XCODE5/X64 RELEASE || exit 1
   ln -s ../UDK/Build/AppleSupportPkg/DEBUG_XCODE5/X64 DEBUG || exit 1
+  ln -s ../UDK/Build/AppleSupportPkg/NOOPT_XCODE5/X64 NOOPT || exit 1
   cd .. || exit 1
 fi