gdbsupport/buffer.cc

   1 /* A simple growing buffer for GDB.
   2
   3    Copyright (C) 2009-2020 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 *str = buf;
  92           const char *f_old = f;
  93
  94           switch (*f)
  95             {
  96             case 's':
  97               str = va_arg (ap, char *);
  98               break;
  99             case 'd':
 100               sprintf (str, "%d", va_arg (ap, int));
 101               break;
 102             case 'u':
 103               sprintf (str, "%u", va_arg (ap, unsigned int));
 104               break;
 105             case 'x':
 106               sprintf (str, "%x", va_arg (ap, unsigned int));
 107               break;
 108             case 'o':
 109               sprintf (str, "%o", va_arg (ap, unsigned int));
 110               break;
 111             case 'l':
 112               f++;
 113               switch (*f)
 114                 {
 115                 case 'd':
 116                   sprintf (str, "%ld", va_arg (ap, long));
 117                   break;
 118                 case 'u':
 119                   sprintf (str, "%lu", va_arg (ap, unsigned long));
 120                   break;
 121                 case 'x':
 122                   sprintf (str, "%lx", va_arg (ap, unsigned long));
 123                   break;
 124                 case 'o':
 125                   sprintf (str, "%lo", va_arg (ap, unsigned long));
 126                   break;
 127                 case 'l':
 128                   f++;
 129                   switch (*f)
 130                     {
 131                     case 'd':
 132                       sprintf (str, "%" PRId64,
 133                                (int64_t) va_arg (ap, long long));
 134                       break;
 135                     case 'u':
 136                       sprintf (str, "%" PRIu64,
 137                                (uint64_t) va_arg (ap, unsigned long long));
 138                       break;
 139                     case 'x':
 140                       sprintf (str, "%" PRIx64,
 141                                (uint64_t) va_arg (ap, unsigned long long));
 142                       break;
 143                     case 'o':
 144                       sprintf (str, "%" PRIo64,
 145                                (uint64_t) va_arg (ap, unsigned long long));
 146                       break;
 147                     default:
 148                       str = 0;
 149                       break;
 150                     }
 151                   break;
 152                 default:
 153                   str = 0;
 154                   break;
 155                 }
 156               break;
 157             default:
 158               str = 0;
 159               break;
 160             }
 161
 162           if (str)
 163             {
 164               buffer_grow (buffer, prev, f_old - prev - 1);
 165               std::string p = xml_escape_text (str);
 166               buffer_grow_str (buffer, p.c_str ());
 167               prev = f + 1;
 168             }
 169           percent = 0;
 170         }
 171       else if (*f == '%')
 172         percent = 1;
 173     }
 174
 175   buffer_grow_str (buffer, prev);
 176   va_end (ap);
 177 }
 178