chiark - git - mdw - mLib/blob - struct/buf-dstr.c

   1 /* -*-c-*-
   2  *
   3  * Buffers and dynamic strings
   4  *
   5  * (c) 2005 Straylight/Edgeware
   6  */
   7
   8 /*----- Licensing notice --------------------------------------------------*
   9  *
  10  * This file is part of the mLib utilities library.
  11  *
  12  * mLib is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU Library General Public License as
  14  * published by the Free Software Foundation; either version 2 of the
  15  * License, or (at your option) any later version.
  16  *
  17  * mLib is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU Library General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU Library General Public
  23  * License along with mLib; if not, write to the Free
  24  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  25  * MA 02111-1307, USA.
  26  */
  27
  28 /*----- Header files ------------------------------------------------------*/
  29
  30 #include <string.h>
  31
  32 #include "buf.h"
  33
  34 /*----- Main code ---------------------------------------------------------*/
  35
  36 /* --- @buf_getdstr{8,{16,24,32,64}{,l,b},z} --- *
  37  *
  38  * Arguments:   @buf *b@ = pointer to a buffer block
  39  *              @dstr *d@ = where to put the result
  40  *
  41  * Returns:     Zero if it worked, nonzero if there wasn't enough space.
  42  *
  43  * Use:         Gets a block of data from a buffer, and writes its contents
  44  *              to a string.
  45  */
  46
  47 #define BUF_GETDSTR_(n, W, w)                                           \
  48   int buf_getdstr##w(buf *b, dstr *d)                                   \
  49   {                                                                     \
  50     void *p;                                                            \
  51     size_t sz;                                                          \
  52                                                                         \
  53     if ((p = buf_getmem##w(b, &sz)) == 0)                               \
  54       return (-1);                                                      \
  55     DPUTM(d, p, sz);                                                    \
  56     return (0);                                                         \
  57   }
  58 BUF_DOSUFFIXES(BUF_GETDSTR_)
  59
  60 /* --- @buf_putdstr{8,{16,24,32,64}{,l,b},z} --- *
  61  *
  62  * Arguments:   @buf *b@ = pointer to a buffer block
  63  *              @dstr *d@ = string to write
  64  *
  65  * Returns:     Zero if it worked, nonzero if there wasn't enough space.
  66  *
  67  * Use:         Puts a dynamic string to a buffer.
  68  */
  69
  70 #define BUF_PUTDSTR_(n, W, w)                                           \
  71   int buf_putdstr##w(buf *b, dstr *d)                                   \
  72     { return (buf_putmem##w(b, d->buf, d->len)); }
  73 BUF_DOSUFFIXES(BUF_PUTDSTR_)
  74
  75 /*----- That's all, folks -------------------------------------------------*/