1  /*
       2   * No copyright is claimed.  This code is in the public domain; do with
       3   * it what you wish.
       4   */
       5  #ifndef UTIL_LINUX_BUFFER
       6  #define UTIL_LINUX_BUFFER
       7  
       8  #include "c.h"
       9  
      10  struct ul_buffer {
      11  	char *begin;		/* begin of the data */
      12  	char *end;		/* current end of data */
      13  
      14  	size_t sz;		/* allocated space for data */
      15  	size_t chunksize;
      16  
      17  	char *encoded;		/* encoded data (from mbs_safe_encode_to_buffer)) */
      18  	size_t encoded_sz;	/* space allocated for encoded data */
      19  
      20  	char **ptrs;		/* saved pointers */
      21  	size_t nptrs;		/* number of saved pointers */
      22  };
      23  
      24  #define UL_INIT_BUFFER { .begin = NULL }
      25  
      26  void ul_buffer_reset_data(struct ul_buffer *buf);
      27  void ul_buffer_free_data(struct ul_buffer *buf);
      28  int ul_buffer_is_empty(struct ul_buffer *buf);
      29  void ul_buffer_set_chunksize(struct ul_buffer *buf, size_t sz);
      30  void ul_buffer_refer_string(struct ul_buffer *buf, char *str);
      31  int ul_buffer_alloc_data(struct ul_buffer *buf, size_t sz);
      32  int ul_buffer_append_data(struct ul_buffer *buf, const char *data, size_t sz);
      33  int ul_buffer_append_string(struct ul_buffer *buf, const char *str);
      34  int ul_buffer_append_ntimes(struct ul_buffer *buf, size_t n, const char *str);
      35  int ul_buffer_set_data(struct ul_buffer *buf, const char *data, size_t sz);
      36  
      37  char *ul_buffer_get_data(struct ul_buffer *buf,  size_t *sz, size_t *width);
      38  char *ul_buffer_get_safe_data(struct ul_buffer *buf, size_t *sz, size_t *width, const char *safechars);
      39  
      40  size_t ul_buffer_get_bufsiz(struct ul_buffer *buf);
      41  
      42  int ul_buffer_save_pointer(struct ul_buffer *buf, unsigned short ptr_idx);
      43  char *ul_buffer_get_pointer(struct ul_buffer *buf, unsigned short  ptr_idx);
      44  size_t ul_buffer_get_pointer_length(struct ul_buffer *buf, unsigned short ptr_idx);
      45  size_t ul_buffer_get_safe_pointer_width(struct ul_buffer *buf, unsigned short ptr_idx);
      46  
      47  
      48  #endif /* UTIL_LINUX_BUFFER */