lib/dynamic-string.h

   1 /*
   2  * Copyright (c) 2008, 2009, 2010, 2011 Nicira Networks.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at:
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #ifndef DYNAMIC_STRING_H
  18 #define DYNAMIC_STRING_H 1
  19
  20 #include <stdarg.h>
  21 #include <stdbool.h>
  22 #include <stddef.h>
  23 #include <stdint.h>
  24 #include <stdio.h>
  25 #include "compiler.h"
  26
  27 struct tm;
  28
  29 struct ds {
  30     char *string;       /* Null-terminated string. */
  31     size_t length;      /* Bytes used, not including null terminator. */
  32     size_t allocated;   /* Bytes allocated, not including null terminator. */
  33 };
  34
  35 #define DS_EMPTY_INITIALIZER { NULL, 0, 0 }
  36
  37 void ds_init(struct ds *);
  38 void ds_clear(struct ds *);
  39 void ds_truncate(struct ds *, size_t new_length);
  40 void ds_reserve(struct ds *, size_t min_length);
  41 char *ds_put_uninit(struct ds *, size_t n);
  42 static inline void ds_put_char(struct ds *, char);
  43 void ds_put_utf8(struct ds *, int uc);
  44 void ds_put_char_multiple(struct ds *, char, size_t n);
  45 void ds_put_buffer(struct ds *, const char *, size_t n);
  46 void ds_put_cstr(struct ds *, const char *);
  47 void ds_put_and_free_cstr(struct ds *, char *);
  48 void ds_put_format(struct ds *, const char *, ...) PRINTF_FORMAT(2, 3);
  49 void ds_put_format_valist(struct ds *, const char *, va_list)
  50     PRINTF_FORMAT(2, 0);
  51 void ds_put_printable(struct ds *, const char *, size_t);
  52 void ds_put_strftime(struct ds *, const char *, const struct tm *)
  53     STRFTIME_FORMAT(2);
  54 void ds_put_hex_dump(struct ds *ds, const void *buf_, size_t size,
  55                      uintptr_t ofs, bool ascii);
  56 int ds_get_line(struct ds *, FILE *);
  57 int ds_get_preprocessed_line(struct ds *, FILE *);
  58
  59 char *ds_cstr(struct ds *);
  60 const char *ds_cstr_ro(const struct ds *);
  61 char *ds_steal_cstr(struct ds *);
  62 void ds_destroy(struct ds *);
  63 void ds_swap(struct ds *, struct ds *);
  64
  65 int ds_last(const struct ds *);
  66 void ds_chomp(struct ds *, int c);
  67 \f
  68 /* Inline functions. */
  69
  70 void ds_put_char__(struct ds *, char);
  71
  72 static inline void
  73 ds_put_char(struct ds *ds, char c)
  74 {
  75     if (ds->length < ds->allocated) {
  76         ds->string[ds->length++] = c;
  77         ds->string[ds->length] = '\0';
  78     } else {
  79         ds_put_char__(ds, c);
  80     }
  81 }
  82
  83 #endif /* dynamic-string.h */