initial code for dumping imessages in a reasonable format

dump-imessages/iphone-dataprotection/emf_decrypter/hfs/flatfile.c

@@ -0,0 +1,104 @@
+#include <stdlib.h>
+#include <hfs/hfsplus.h>
+
+static int flatFileRead(io_func* io, off_t location, size_t size, void *buffer) {
+  FILE* file;
+  file = (FILE*) io->data;
+  
+  if(size == 0) {
+    return TRUE;
+  }
+  
+  //printf("%d %d\n", location, size); fflush(stdout);
+  
+  if(fseeko(file, location, SEEK_SET) != 0) {
+    perror("fseek");
+    return FALSE;
+  }
+   
+  if(fread(buffer, size, 1, file) != 1) {
+    perror("fread");
+    return FALSE;
+  } else {
+    return TRUE;
+  }
+}
+
+static int flatFileWrite(io_func* io, off_t location, size_t size, void *buffer) {
+  FILE* file;
+  
+  /*int i;
+  
+  printf("write: %lld %d - ", location, size); fflush(stdout);
+  
+  for(i = 0; i < size; i++) {
+    printf("%x ", ((unsigned char*)buffer)[i]);
+    fflush(stdout);
+  }
+  printf("\n"); fflush(stdout);*/
+  
+  if(size == 0) {
+    return TRUE;
+  }
+  
+  file = (FILE*) io->data;
+  
+  if(fseeko(file, location, SEEK_SET) != 0) {
+    perror("fseek");
+    return FALSE;
+  }
+  
+  if(fwrite(buffer, size, 1, file) != 1) {
+    perror("fwrite");
+    return FALSE;
+  } else {
+    return TRUE;
+  }
+ 
+  return TRUE;
+}
+
+static void closeFlatFile(io_func* io) {
+  FILE* file;
+  
+  file = (FILE*) io->data;
+  
+  fclose(file);
+  free(io);
+}
+
+io_func* openFlatFile(const char* fileName) {
+  io_func* io;
+  
+  io = (io_func*) malloc(sizeof(io_func));
+  io->data = fopen(fileName, "rb+");
+  
+  if(io->data == NULL) {
+    perror("fopen");
+    return NULL;
+  }
+  
+  io->read = &flatFileRead;
+  io->write = &flatFileWrite;
+  io->close = &closeFlatFile;
+  
+  return io;
+}
+
+io_func* openFlatFileRO(const char* fileName) {
+  io_func* io;
+  
+  io = (io_func*) malloc(sizeof(io_func));
+  io->data = fopen(fileName, "rb");
+  
+  if(io->data == NULL) {
+    perror("fopen");
+    return NULL;
+  }
+  
+  io->read = &flatFileRead;
+  io->write = &flatFileWrite;
+  io->close = &closeFlatFile;
+  
+  return io;
+}