gdb/common/buffer.c

   1 /* A simple growing buffer for GDB.
   2
   3    Copyright (C) 2009-2012 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #ifdef GDBSERVER
  21 #include "server.h"
  22 #else
  23 #include "defs.h"
  24 #endif
  25
  26 #include "xml-utils.h"
  27 #include "buffer.h"
  28
  29 #include <stdlib.h>
  30 #include <string.h>
  31 #include <stdio.h>
  32
  33 void
  34 buffer_grow (struct buffer *buffer, const char *data, size_t size)
  35 {
  36   char *new_buffer;
  37   size_t new_buffer_size;
  38
  39   if (size == 0)
  40     return;
  41
  42   new_buffer_size = buffer->buffer_size;
  43
  44   if (new_buffer_size == 0)
  45     new_buffer_size = 1;
  46
  47   while (buffer->used_size + size > new_buffer_size)
  48     new_buffer_size *= 2;
  49   new_buffer = xrealloc (buffer->buffer, new_buffer_size);
  50   if (!new_buffer)
  51     abort ();
  52   memcpy (new_buffer + buffer->used_size, data, size);
  53   buffer->buffer = new_buffer;
  54   buffer->buffer_size = new_buffer_size;
  55   buffer->used_size += size;
  56 }
  57
  58 void
  59 buffer_free (struct buffer *buffer)
  60 {
  61   if (!buffer)
  62     return;
  63
  64   xfree (buffer->buffer);
  65   buffer->buffer = NULL;
  66   buffer->buffer_size = 0;
  67   buffer->used_size = 0;
  68 }
  69
  70 void
  71 buffer_init (struct buffer *buffer)
  72 {
  73   memset (buffer, 0, sizeof (*buffer));
  74 }
  75
  76 char*
  77 buffer_finish (struct buffer *buffer)
  78 {
  79   char *ret = buffer->buffer;
  80   buffer->buffer = NULL;
  81   buffer->buffer_size = 0;
  82   buffer->used_size = 0;
  83   return ret;
  84 }
  85
  86 void
  87 buffer_xml_printf (struct buffer *buffer, const char *format, ...)
  88 {
  89   va_list ap;
  90   const char *f;
  91   const char *prev;
  92   int percent = 0;
  93
  94   va_start (ap, format);
  95
  96   prev = format;
  97   for (f = format; *f; f++)
  98     {
  99       if (percent)
 100         {
 101           char buf[32];
 102           char *p;
 103           char *str = buf;
 104
 105           switch (*f)
 106             {
 107             case 's':
 108               str = va_arg (ap, char *);
 109               break;
 110             case 'd':
 111               sprintf (str, "%d", va_arg (ap, int));
 112               break;
 113             case 'u':
 114               sprintf (str, "%u", va_arg (ap, unsigned int));
 115               break;
 116             case 'x':
 117               sprintf (str, "%x", va_arg (ap, unsigned int));
 118               break;
 119             case 'o':
 120               sprintf (str, "%o", va_arg (ap, unsigned int));
 121               break;
 122             default:
 123               str = 0;
 124               break;
 125             }
 126
 127           if (str)
 128             {
 129               buffer_grow (buffer, prev, f - prev - 1);
 130               p = xml_escape_text (str);
 131               buffer_grow_str (buffer, p);
 132               xfree (p);
 133               prev = f + 1;
 134             }
 135           percent = 0;
 136         }
 137       else if (*f == '%')
 138         percent = 1;
 139     }
 140
 141   buffer_grow_str (buffer, prev);
 142   va_end (ap);
 143 }
 144