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   memcpy (new_buffer + buffer->used_size, data, size);
  51   buffer->buffer = new_buffer;
  52   buffer->buffer_size = new_buffer_size;
  53   buffer->used_size += size;
  54 }
  55
  56 void
  57 buffer_free (struct buffer *buffer)
  58 {
  59   if (!buffer)
  60     return;
  61
  62   xfree (buffer->buffer);
  63   buffer->buffer = NULL;
  64   buffer->buffer_size = 0;
  65   buffer->used_size = 0;
  66 }
  67
  68 void
  69 buffer_init (struct buffer *buffer)
  70 {
  71   memset (buffer, 0, sizeof (*buffer));
  72 }
  73
  74 char*
  75 buffer_finish (struct buffer *buffer)
  76 {
  77   char *ret = buffer->buffer;
  78   buffer->buffer = NULL;
  79   buffer->buffer_size = 0;
  80   buffer->used_size = 0;
  81   return ret;
  82 }
  83
  84 void
  85 buffer_xml_printf (struct buffer *buffer, const char *format, ...)
  86 {
  87   va_list ap;
  88   const char *f;
  89   const char *prev;
  90   int percent = 0;
  91
  92   va_start (ap, format);
  93
  94   prev = format;
  95   for (f = format; *f; f++)
  96     {
  97       if (percent)
  98         {
  99           char buf[32];
 100           char *p;
 101           char *str = buf;
 102           const char *f_old = f;
 103
 104           switch (*f)
 105             {
 106             case 's':
 107               str = va_arg (ap, char *);
 108               break;
 109             case 'd':
 110               sprintf (str, "%d", va_arg (ap, int));
 111               break;
 112             case 'u':
 113               sprintf (str, "%u", va_arg (ap, unsigned int));
 114               break;
 115             case 'x':
 116               sprintf (str, "%x", va_arg (ap, unsigned int));
 117               break;
 118             case 'o':
 119               sprintf (str, "%o", va_arg (ap, unsigned int));
 120               break;
 121             case 'l':
 122               f++;
 123               switch (*f)
 124                 {
 125                 case 'd':
 126                   sprintf (str, "%ld", va_arg (ap, long));
 127                   break;
 128                 case 'u':
 129                   sprintf (str, "%lu", va_arg (ap, unsigned long));
 130                   break;
 131                 case 'x':
 132                   sprintf (str, "%lx", va_arg (ap, unsigned long));
 133                   break;
 134                 case 'o':
 135                   sprintf (str, "%lo", va_arg (ap, unsigned long));
 136                   break;
 137                 case 'l':
 138                   f++;
 139                   switch (*f)
 140                     {
 141                     case 'd':
 142                       sprintf (str, "%lld", va_arg (ap, long long));
 143                       break;
 144                     case 'u':
 145                       sprintf (str, "%llu", va_arg (ap, unsigned long long));
 146                       break;
 147                     case 'x':
 148                       sprintf (str, "%llx", va_arg (ap, unsigned long long));
 149                       break;
 150                     case 'o':
 151                       sprintf (str, "%llo", va_arg (ap, unsigned long long));
 152                       break;
 153                     default:
 154                       str = 0;
 155                       break;
 156                     }
 157                   break;
 158                 default:
 159                   str = 0;
 160                   break;
 161                 }
 162               break;
 163             default:
 164               str = 0;
 165               break;
 166             }
 167
 168           if (str)
 169             {
 170               buffer_grow (buffer, prev, f_old - prev - 1);
 171               p = xml_escape_text (str);
 172               buffer_grow_str (buffer, p);
 173               xfree (p);
 174               prev = f + 1;
 175             }
 176           percent = 0;
 177         }
 178       else if (*f == '%')
 179         percent = 1;
 180     }
 181
 182   buffer_grow_str (buffer, prev);
 183   va_end (ap);
 184 }
 185