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

   1 /* -*-c-*-
   2  *
   3  * $Id$
   4  *
   5  * Buffers and dynamic strings
   6  *
   7  * (c) 2005 Straylight/Edgeware
   8  */
   9
  10 /*----- Licensing notice --------------------------------------------------*
  11  *
  12  * This file is part of the mLib utilities library.
  13  *
  14  * mLib is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU Library General Public License as
  16  * published by the Free Software Foundation; either version 2 of the
  17  * License, or (at your option) any later version.
  18  *
  19  * mLib is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU Library General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU Library General Public
  25  * License along with mLib; if not, write to the Free
  26  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  27  * MA 02111-1307, USA.
  28  */
  29
  30 /*----- Header files ------------------------------------------------------*/
  31
  32 #include <string.h>
  33
  34 #include "buf.h"
  35
  36 /*----- Main code ---------------------------------------------------------*/
  37
  38 /* --- @buf_getdstr{8,{16,24,32,64}{,l,b},z} --- *
  39  *
  40  * Arguments:   @buf *b@ = pointer to a buffer block
  41  *              @dstr *d@ = where to put the result
  42  *
  43  * Returns:     Zero if it worked, nonzero if there wasn't enough space.
  44  *
  45  * Use:         Gets a block of data from a buffer, and writes its contents
  46  *              to a string.
  47  */
  48
  49 #define BUF_GETDSTR_(n, W, w)                                           \
  50   int buf_getdstr##w(buf *b, dstr *d)                                   \
  51   {                                                                     \
  52     void *p;                                                            \
  53     size_t sz;                                                          \
  54                                                                         \
  55     if ((p = buf_getmem##w(b, &sz)) == 0)                               \
  56       return (-1);                                                      \
  57     DPUTM(d, p, sz);                                                    \
  58     return (0);                                                         \
  59   }
  60 BUF_DOSUFFIXES(BUF_GETDSTR_)
  61
  62 /* --- @buf_putdstr{8,{16,24,32,64}{,l,b},z} --- *
  63  *
  64  * Arguments:   @buf *b@ = pointer to a buffer block
  65  *              @dstr *d@ = string to write
  66  *
  67  * Returns:     Zero if it worked, nonzero if there wasn't enough space.
  68  *
  69  * Use:         Puts a dynamic string to a buffer.
  70  */
  71
  72 #define BUF_PUTDSTR_(n, W, w)                                           \
  73   int buf_putdstr##w(buf *b, dstr *d)                                   \
  74     { return (buf_putmem##w(b, d->buf, d->len)); }
  75 BUF_DOSUFFIXES(BUF_PUTDSTR_)
  76
  77 /*----- That's all, folks -------------------------------------------------*/