/* function: initfile_filereader
* Opens file for reading.
*
* The caller must free all out variables even in case of error ! */
static int initfile_filereader(/*out*/file_t * fd, /*out*/off_t * filesize, const char * filepath, const struct directory_t * relative_to/*0 => current working dir*/)
{
int err;
err = init_file(fd, filepath, accessmode_READ, relative_to);
if (err) return err;
err = size_file(*fd, filesize);
if (err) return err;
err = advisereadahead_file(*fd, 0, *filesize);
if (err) return err;
return 0;
}
int main(int argc, char *argv[])
{
if (argc < 2 || argc > 3) {
std::cerr << "usage: " << argv[0] << " infile outfile\n";
exit(1);
}
std::string infile_prefix(argv[1]);
std::string outfile_name;
if (argc == 3) {
outfile_name = argv[2];
} else {
outfile_name = argv[1];
}
std::vector<bool> code_content;
read(infile_prefix+".huff.code", code_content);
Hx::huffman_tree<char, size_t> huff;
read(infile_prefix+".huff.dict", huff);
std::cout << "huffman dictionary:\n";
huff.print(std::cerr);
std::vector<char> file_content;
huff.decode(code_content, file_content);
std::ifstream size_file(infile_prefix+".huff.size");
size_t size;
if (!size_file.good()) {
std::cerr << "open " << infile_prefix+".huff.size" << " fault!\n";
size = file_content.size();
}
size_file >> size;
size_file.close();
file_content.resize(size);
write(outfile_name, file_content);
std::cout << '\n';
std::cout << "huffman decode ok!\n";
return 0;
}
/**
* @brief Open up an empty section cache entry and add the filename
*
* @param section_type The type of the section
* @param filename The name of the file
*
* @returns 0 if successful, -1 otherwise
*/
int section_cache_entry_open(const uint32_t section_type,
const char * filename) {
int linux_style_status = -1; /* assume failure */
section_cache_entry * section = NULL;
if (current_section < MAX_TFTF_SECTION_CACHE) {
/**
* If the args are such that we go directly from one section to the
* next, we need to close the previous section before opening this
* one
*/
if (section_window_open) {
section_cache_entry_close();
}
/*
* Open the window and save the filename and type.
* Note: we don't allocate and load the file into
* section_cache[current_section].blob at this point. We will load
* the file later.
*/
section = §ion_cache[current_section];
section_window_open = true;
section->blob = NULL;
section->section.section_type = section_type;
if (filename != NULL) {
section->filename = filename;
section->section.section_length =
section->section.section_expanded_length =
size_file(filename);
}
/* By default, each section's load address is contiguous with
* the previous section. Set the default load address here - we
* will override it in section_cache_entry_set_load_address, and
* section_cache_entry_close will advance the running
* section_load_address to the section's load_address + load_length.
*/
section->section.section_load_address = section_load_address;
linux_style_status = 0;
}
return linux_style_status;
}
