initial code for dumping imessages in a reasonable format

dump-imessages/iphone-dataprotection/emf_decrypter/includes/hfs/hfscompress.h

@@ -0,0 +1,71 @@
+#ifndef HFSCOMPRESS_H
+#define HFSCOMPRESS_H
+
+#include <stdint.h>
+#include "common.h"
+
+#define CMPFS_MAGIC 0x636D7066
+
+typedef struct HFSPlusDecmpfs {
+	uint32_t magic;
+	uint32_t flags;
+	uint64_t size;
+	uint8_t data[0];
+} __attribute__ ((packed)) HFSPlusDecmpfs;
+
+typedef struct HFSPlusCmpfRsrcHead {
+	uint32_t headerSize;
+	uint32_t totalSize;
+	uint32_t dataSize;
+	uint32_t flags;
+} __attribute__ ((packed)) HFSPlusCmpfRsrcHead;
+
+typedef struct HFSPlusCmpfRsrcBlock {
+	uint32_t offset;
+	uint32_t size;
+} __attribute__ ((packed)) HFSPlusCmpfRsrcBlock;
+
+typedef struct HFSPlusCmpfRsrcBlockHead {
+	uint32_t dataSize;
+	uint32_t numBlocks;
+	HFSPlusCmpfRsrcBlock blocks[0];
+} __attribute__ ((packed)) HFSPlusCmpfRsrcBlockHead;
+
+typedef struct HFSPlusCmpfEnd {
+	uint32_t pad[6];
+	uint16_t unk1;
+	uint16_t unk2;
+	uint16_t unk3;
+	uint32_t magic;
+	uint32_t flags;
+	uint64_t size;
+	uint32_t unk4;
+} __attribute__ ((packed)) HFSPlusCmpfEnd;
+
+typedef struct HFSPlusCompressed {
+	Volume* volume;
+	HFSPlusCatalogFile* file;
+	io_func* io;
+	size_t decmpfsSize;
+	HFSPlusDecmpfs* decmpfs;
+
+	HFSPlusCmpfRsrcHead rsrcHead;
+	HFSPlusCmpfRsrcBlockHead* blocks;
+
+	int dirty;
+
+	uint8_t* cached;
+	uint32_t cachedStart;
+	uint32_t cachedEnd;
+} HFSPlusCompressed;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+	void flipHFSPlusDecmpfs(HFSPlusDecmpfs* compressData);
+	io_func* openHFSPlusCompressed(Volume* volume, HFSPlusCatalogFile* file);
+#ifdef __cplusplus
+}
+#endif
+
+#endif