gdb/common/buffer.c

   1 /* A simple growing buffer for GDB.
   2
   3    Copyright (C) 2009-2014 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 #include "inttypes.h"
  29
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <stdint.h>
  33
  34 void
  35 buffer_grow (struct buffer *buffer, const char *data, size_t size)
  36 {
  37   char *new_buffer;
  38   size_t new_buffer_size;
  39
  40   if (size == 0)
  41     return;
  42
  43   new_buffer_size = buffer->buffer_size;
  44
  45   if (new_buffer_size == 0)
  46     new_buffer_size = 1;
  47
  48   while (buffer->used_size + size > new_buffer_size)
  49     new_buffer_size *= 2;
  50   new_buffer = xrealloc (buffer->buffer, new_buffer_size);
  51   memcpy (new_buffer + buffer->used_size, data, size);
  52   buffer->buffer = new_buffer;
  53   buffer->buffer_size = new_buffer_size;
  54   buffer->used_size += size;
  55 }
  56
  57 void
  58 buffer_free (struct buffer *buffer)
  59 {
  60   if (!buffer)
  61     return;
  62
  63   xfree (buffer->buffer);
  64   buffer->buffer = NULL;
  65   buffer->buffer_size = 0;
  66   buffer->used_size = 0;
  67 }
  68
  69 void
  70 buffer_init (struct buffer *buffer)
  71 {
  72   memset (buffer, 0, sizeof (*buffer));
  73 }
  74
  75 char*
  76 buffer_finish (struct buffer *buffer)
  77 {
  78   char *ret = buffer->buffer;
  79   buffer->buffer = NULL;
  80   buffer->buffer_size = 0;
  81   buffer->used_size = 0;
  82   return ret;
  83 }
  84
  85 void
  86 buffer_xml_printf (struct buffer *buffer, const char *format, ...)
  87 {
  88   va_list ap;
  89   const char *f;
  90   const char *prev;
  91   int percent = 0;
  92
  93   va_start (ap, format);
  94
  95   prev = format;
  96   for (f = format; *f; f++)
  97     {
  98       if (percent)
  99         {
 100           char buf[32];
 101           char *p;
 102           char *str = buf;
 103           const char *f_old = f;
 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             case 'l':
 123               f++;
 124               switch (*f)
 125                 {
 126                 case 'd':
 127                   sprintf (str, "%ld", va_arg (ap, long));
 128                   break;
 129                 case 'u':
 130                   sprintf (str, "%lu", va_arg (ap, unsigned long));
 131                   break;
 132                 case 'x':
 133                   sprintf (str, "%lx", va_arg (ap, unsigned long));
 134                   break;
 135                 case 'o':
 136                   sprintf (str, "%lo", va_arg (ap, unsigned long));
 137                   break;
 138                 case 'l':
 139                   f++;
 140                   switch (*f)
 141                     {
 142                     case 'd':
 143                       sprintf (str, "%" PRId64,
 144                                (int64_t) va_arg (ap, long long));
 145                       break;
 146                     case 'u':
 147                       sprintf (str, "%" PRIu64,
 148                                (uint64_t) va_arg (ap, unsigned long long));
 149                       break;
 150                     case 'x':
 151                       sprintf (str, "%" PRIx64,
 152                                (uint64_t) va_arg (ap, unsigned long long));
 153                       break;
 154                     case 'o':
 155                       sprintf (str, "%" PRIo64,
 156                                (uint64_t) va_arg (ap, unsigned long long));
 157                       break;
 158                     default:
 159                       str = 0;
 160                       break;
 161                     }
 162                   break;
 163                 default:
 164                   str = 0;
 165                   break;
 166                 }
 167               break;
 168             default:
 169               str = 0;
 170               break;
 171             }
 172
 173           if (str)
 174             {
 175               buffer_grow (buffer, prev, f_old - prev - 1);
 176               p = xml_escape_text (str);
 177               buffer_grow_str (buffer, p);
 178               xfree (p);
 179               prev = f + 1;
 180             }
 181           percent = 0;
 182         }
 183       else if (*f == '%')
 184         percent = 1;
 185     }
 186
 187   buffer_grow_str (buffer, prev);
 188   va_end (ap);
 189 }
 190