git.m6w6.name Git - m6w6/libmemcached/blob - libmemcached/string.h

   1 /* LibMemcached
   2  * Copyright (C) 2006-2009 Brian Aker
   3  * All rights reserved.
   4  *
   5  * Use and distribution licensed under the BSD license.  See
   6  * the COPYING file in the parent directory for full text.
   7  *
   8  * Summary: String structure used for libmemcached.
   9  *
  10  */
  11
  12 #ifndef __LIBMEMCACHED_STRING_H__
  13 #define __LIBMEMCACHED_STRING_H__
  14
  15 /**
  16   Strings are always under our control so we make some assumptions
  17   about them.
  18
  19   1) is_initialized is always valid.
  20   2) A string once intialized will always be, until free where we
  21      unset this flag.
  22   3) A string always has a root.
  23 */
  24
  25 struct memcached_string_st {
  26   char *end;
  27   char *string;
  28   size_t current_size;
  29   const memcached_st *root;
  30   struct {
  31     bool is_allocated:1;
  32     bool is_initialized:1;
  33   } options;
  34 };
  35
  36 #ifdef __cplusplus
  37 extern "C" {
  38 #endif
  39
  40 LIBMEMCACHED_LOCAL
  41 memcached_string_st *memcached_string_create(const memcached_st *ptr,
  42                                              memcached_string_st *string,
  43                                              size_t initial_size);
  44 LIBMEMCACHED_LOCAL
  45 memcached_return_t memcached_string_check(memcached_string_st *string, size_t need);
  46
  47 LIBMEMCACHED_LOCAL
  48 char *memcached_string_c_copy(memcached_string_st *string);
  49
  50 LIBMEMCACHED_LOCAL
  51 memcached_return_t memcached_string_append_character(memcached_string_st *string,
  52                                                      char character);
  53 LIBMEMCACHED_LOCAL
  54 memcached_return_t memcached_string_append(memcached_string_st *string,
  55                                            const char *value, size_t length);
  56 LIBMEMCACHED_LOCAL
  57 memcached_return_t memcached_string_reset(memcached_string_st *string);
  58
  59 LIBMEMCACHED_LOCAL
  60 void memcached_string_free(memcached_string_st *string);
  61
  62 static inline size_t memcached_string_length(const memcached_string_st *self)
  63 {
  64   return (size_t)(self->end - self->string);
  65 }
  66
  67 static inline size_t memcached_string_size(const memcached_string_st *self)
  68 {
  69   return self->current_size;
  70 }
  71
  72 static inline const char *memcached_string_value(const memcached_string_st *self)
  73 {
  74   return self->string;
  75 }
  76
  77 static inline char *memcached_string_value_mutable(const memcached_string_st *self)
  78 {
  79   return self->string;
  80 }
  81
  82 #define memcached_string_set_length(A, B) (A)->end= (A)->string + B
  83
  84 #ifdef __cplusplus
  85 }
  86 #endif
  87
  88
  89 #endif /* __LIBMEMCACHED_STRING_H__ */