Class: Mspack::ChmDecompressor

Inherits:
Object
  • Object
show all
Defined in:
lib/mspack/chm_decompressor.rb,
ext/mspack_native/chm_decompressor.c

Defined Under Namespace

Classes: File, Header

Instance Method Summary collapse

Instance Method Details

#close(header) ⇒ Object 



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# File 'ext/mspack_native/chm_decompressor.c', line 115

VALUE chmd_close(VALUE self, VALUE header) {
  if (!CLASS_OF(header) == ChmDHeader) {
    rb_raise(rb_eTypeError, "Parameter must be a CHM decompression header");
  }

  struct decom_wrapper *wrapper;
  Data_Get_Struct(self, struct decom_wrapper, wrapper);

  struct mschmd_header *headerPtr;
  Data_Get_Struct(header, struct mschmd_header, headerPtr);

  wrapper->decom->close(wrapper->decom, headerPtr);
  return Qnil;
}

#extract(file, dir = nil) ⇒ Object

Expects a ChmDecompressor::File and a string. Calls Mspack.ensure_path and extracts file. Returns the absolute file path.



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# File 'lib/mspack/chm_decompressor.rb', line 9

def extract(file, dir = nil)
  if block_given?
    extract_to_path(file) { |data| yield data }
  else
    path = Mspack.ensure_path(file.filename, dir)
    extract_to_path(file, path)
  end

  path
end

#extract_to_path(*args) ⇒ Object

Form 1: extract_to_path(file, outputPath)

Form 2: extract_to_path(file) { |data_chunk| do_something(data_chunk) }



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# File 'ext/mspack_native/chm_decompressor.c', line 137

VALUE chmd_extract_to_path(int argc, VALUE* argv, VALUE self) {
  VALUE file;
  VALUE outputPath;
  rb_scan_args(argc, argv, "11", &file, &outputPath);
  const char *pathStr;

  if (!CLASS_OF(file) == ChmDFile) {
    rb_raise(rb_eTypeError, "First parameter must be a CHM decompression file");
  }

  if (argc == 1) {
    rb_need_block();
    VALUE block = rb_block_proc();
    VALUE block_name = rb_funcall(block, rb_intern("object_id"), 0);
    VALUE block_name_str = rb_funcall(block_name, rb_intern("to_s"), 0);
    pathStr = StringValueCStr(block_name_str);
  }
  else {
    Check_Type(outputPath, T_STRING);
    pathStr = StringValueCStr(outputPath);
  }

  struct decom_wrapper *wrapper;
  Data_Get_Struct(self, struct decom_wrapper, wrapper);

  struct chmd_file_wrapper *headerWrapper;
  Data_Get_Struct(file, struct chmd_file_wrapper, headerWrapper);

  int result = 
    wrapper->decom->extract(wrapper->decom, headerWrapper->file, pathStr);

  return result == MSPACK_ERR_OK ? Qtrue : Qfalse;
}

#fast_find(header, filename) ⇒ Object 



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# File 'ext/mspack_native/chm_decompressor.c', line 183

VALUE chmd_fast_find(VALUE self, VALUE header, VALUE filename) {
  struct decom_wrapper *wrapper;
  Data_Get_Struct(self, struct decom_wrapper, wrapper);

  struct mschmd_header *headerPtr;
  Data_Get_Struct(header, struct mschmd_header, headerPtr);

  const char *filenameStr = StringValueCStr(filename);

  int structSize = sizeof(struct mschmd_file);
  struct mschmd_file *file = malloc(structSize);

  int result = wrapper->decom->fast_find(
    wrapper->decom, headerPtr, filenameStr, file, structSize);

  if (result != MSPACK_ERR_OK || file->length == 0) {
    free(file);
    return Qnil;
  }  

  file->filename = malloc(sizeof(char) * strlen(filenameStr) + 1);
  strcpy(file->filename, filenameStr);

  struct chmd_file_wrapper *fileWrapper = 
    malloc(sizeof(struct chmd_file_wrapper));
  fileWrapper->is_fast_find = 1;
  fileWrapper->file = file;

  return Data_Wrap_Struct(ChmDFile, NULL, chmd_file_free, fileWrapper);
}

#fast_open(path) ⇒ Object 



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# File 'ext/mspack_native/chm_decompressor.c', line 179

VALUE chmd_fast_open(VALUE self, VALUE path) {
  return _open(self, path, 1);
}

#last_error ⇒ Object 



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# File 'ext/mspack_native/chm_decompressor.c', line 171

VALUE chmd_last_error(VALUE self) {
  struct decom_wrapper *wrapper;
  Data_Get_Struct(self, struct decom_wrapper, wrapper);

  int error = wrapper->decom->last_error(wrapper->decom);
  return _error_code_sym(error);
}

#open(path) ⇒ Object 



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# File 'ext/mspack_native/chm_decompressor.c', line 111

VALUE chmd_open(VALUE self, VALUE path) {
  return _open(self, path, 0);
}