file: Add undocumented READ_MACHO subcommand on macOS

Provide a way to parse the architectures of a Mach-O binary.

Issue: #25952

1 files changed, 22 insertions, 0 deletions

diff --git a/Source/cmMachO.h b/Source/cmMachO.h
index ec7d54c..ddbfc28 100644
--- a/Source/cmMachO.h
+++ b/Source/cmMachO.h
@@ -7,6 +7,9 @@
 #include <iosfwd>
 #include <memory>
 #include <string>
+#include <vector>
+
+#include <mach/machine.h>
 
 #if !defined(CMake_USE_MACH_PARSER)
 #  error "This file may be included only if CMake_USE_MACH_PARSER is enabled."
@@ -20,6 +23,16 @@ class cmMachOInternal;
 class cmMachO
 {
 public:
+  struct MachHeader
+  {
+    cpu_type_t CpuType;
+    cpu_subtype_t CpuSubType;
+    uint32_t FileType;
+  };
+  class StringList : public std::vector<std::string>
+  {
+  };
+
   /** Construct with the name of the Mach-O input file to parse.  */
   cmMachO(const char* fname);
 
@@ -38,8 +51,17 @@ public:
   /** Print human-readable information about the Mach-O file.  */
   void PrintInfo(std::ostream& os) const;
 
+  /** Get the architectural header(s) from the Mach-O file.  */
+  std::vector<struct MachHeader> GetHeaders() const { return this->Headers; }
+
+  /** Get a list of the recognized architectures present in the Mach-O file
+   * in the order in which they are found.
+   */
+  StringList GetArchitectures() const;
+
 private:
   friend class cmMachOInternal;
   bool Valid() const;
   std::unique_ptr<cmMachOInternal> Internal;
+  std::vector<struct MachHeader> Headers;
 };