char* read_text();
int read_data_until(const char *tag_end, char *out, int len);
int read_text_until(const char *tag_end, char *out, int len);
int read_tag();
int write_to_file(const char *filename);
char* read_text();
int read_data_until(const char *tag_end, char *out, int len);
int read_text_until(const char *tag_end, char *out, int len);
int read_tag();
int write_to_file(const char *filename);