include/buffer.h

   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 */