gdb/common/buffer.c

   1 /* A simple growing buffer for GDB.
   2
   3    Copyright (C) 2009-2017 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 #include "common-defs.h"
  21 #include "xml-utils.h"
  22 #include "buffer.h"
  23 #include "inttypes.h"
  24 void
  25 buffer_grow (struct buffer *buffer, const char *data, size_t size)
  26 {
  27   char *new_buffer;
  28   size_t new_buffer_size;
  29
  30   if (size == 0)
  31     return;
  32
  33   new_buffer_size = buffer->buffer_size;
  34
  35   if (new_buffer_size == 0)
  36     new_buffer_size = 1;
  37
  38   while (buffer->used_size + size > new_buffer_size)
  39     new_buffer_size *= 2;
  40   new_buffer = (char *) xrealloc (buffer->buffer, new_buffer_size);
  41   memcpy (new_buffer + buffer->used_size, data, size);
  42   buffer->buffer = new_buffer;
  43   buffer->buffer_size = new_buffer_size;
  44   buffer->used_size += size;
  45 }
  46
  47 void
  48 buffer_free (struct buffer *buffer)
  49 {
  50   if (!buffer)
  51     return;
  52
  53   xfree (buffer->buffer);
  54   buffer->buffer = NULL;
  55   buffer->buffer_size = 0;
  56   buffer->used_size = 0;
  57 }
  58
  59 void
  60 buffer_init (struct buffer *buffer)
  61 {
  62   memset (buffer, 0, sizeof (*buffer));
  63 }
  64
  65 char*
  66 buffer_finish (struct buffer *buffer)
  67 {
  68   char *ret = buffer->buffer;
  69   buffer->buffer = NULL;
  70   buffer->buffer_size = 0;
  71   buffer->used_size = 0;
  72   return ret;
  73 }
  74
  75 void
  76 buffer_xml_printf (struct buffer *buffer, const char *format, ...)
  77 {
  78   va_list ap;
  79   const char *f;
  80   const char *prev;
  81   int percent = 0;
  82
  83   va_start (ap, format);
  84
  85   prev = format;
  86   for (f = format; *f; f++)
  87     {
  88       if (percent)
  89         {
  90           char buf[32];
  91           char *p;
  92           char *str = buf;
  93           const char *f_old = f;
  94
  95           switch (*f)
  96             {
  97             case 's':
  98               str = va_arg (ap, char *);
  99               break;
 100             case 'd':
 101               sprintf (str, "%d", va_arg (ap, int));
 102               break;
 103             case 'u':
 104               sprintf (str, "%u", va_arg (ap, unsigned int));
 105               break;
 106             case 'x':
 107               sprintf (str, "%x", va_arg (ap, unsigned int));
 108               break;
 109             case 'o':
 110               sprintf (str, "%o", va_arg (ap, unsigned int));
 111               break;
 112             case 'l':
 113               f++;
 114               switch (*f)
 115                 {
 116                 case 'd':
 117                   sprintf (str, "%ld", va_arg (ap, long));
 118                   break;
 119                 case 'u':
 120                   sprintf (str, "%lu", va_arg (ap, unsigned long));
 121                   break;
 122                 case 'x':
 123                   sprintf (str, "%lx", va_arg (ap, unsigned long));
 124                   break;
 125                 case 'o':
 126                   sprintf (str, "%lo", va_arg (ap, unsigned long));
 127                   break;
 128                 case 'l':
 129                   f++;
 130                   switch (*f)
 131                     {
 132                     case 'd':
 133                       sprintf (str, "%" PRId64,
 134                                (int64_t) va_arg (ap, long long));
 135                       break;
 136                     case 'u':
 137                       sprintf (str, "%" PRIu64,
 138                                (uint64_t) va_arg (ap, unsigned long long));
 139                       break;
 140                     case 'x':
 141                       sprintf (str, "%" PRIx64,
 142                                (uint64_t) va_arg (ap, unsigned long long));
 143                       break;
 144                     case 'o':
 145                       sprintf (str, "%" PRIo64,
 146                                (uint64_t) va_arg (ap, unsigned long long));
 147                       break;
 148                     default:
 149                       str = 0;
 150                       break;
 151                     }
 152                   break;
 153                 default:
 154                   str = 0;
 155                   break;
 156                 }
 157               break;
 158             default:
 159               str = 0;
 160               break;
 161             }
 162
 163           if (str)
 164             {
 165               buffer_grow (buffer, prev, f_old - prev - 1);
 166               p = xml_escape_text (str);
 167               buffer_grow_str (buffer, p);
 168               xfree (p);
 169               prev = f + 1;
 170             }
 171           percent = 0;
 172         }
 173       else if (*f == '%')
 174         percent = 1;
 175     }
 176
 177   buffer_grow_str (buffer, prev);
 178   va_end (ap);
 179 }
 180