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

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#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;
}