subversion/tests/libsvn_delta/delta-window-test.h

   1 /* delta-window-test.h -- utilities for delta window output
   2  *
   3  * ====================================================================
   4  * Copyright (c) 2000-2004 CollabNet.  All rights reserved.
   5  *
   6  * This software is licensed as described in the file COPYING, which
   7  * you should have received as part of this distribution.  The terms
   8  * are also available at http://subversion.tigris.org/license-1.html.
   9  * If newer versions of this license are posted there, you may use a
  10  * newer version instead, at your option.
  11  *
  12  * This software consists of voluntary contributions made by many
  13  * individuals.  For exact contribution history, see the revision
  14  * history and logs, available at http://subversion.tigris.org/.
  15  * ====================================================================
  16  */
  17
  18 #ifndef SVN_DELTA_WINDOW_TEST_H
  19 #define SVN_DELTA_WINDOW_TEST_H
  20
  21 #define APR_WANT_STDIO
  22 #define APR_WANT_STRFUNC
  23 #include <apr_want.h>
  24 #include <apr_lib.h>
  25
  26 #include "svn_delta.h"
  27
  28 static apr_off_t
  29 delta_window_size_estimate(const svn_txdelta_window_t *window)
  30 {
  31   apr_off_t len;
  32   int i;
  33
  34   if (!window)
  35     return 0;
  36
  37   /* Try to estimate the size of the delta. */
  38   for (i = 0, len = 0; i < window->num_ops; ++i)
  39     {
  40       apr_size_t const offset = window->ops[i].offset;
  41       apr_size_t const length = window->ops[i].length;
  42       if (window->ops[i].action_code == svn_txdelta_new)
  43         {
  44           len += 1;             /* opcode */
  45           len += (length > 255 ? 2 : 1);
  46           len += length;
  47         }
  48       else
  49         {
  50           len += 1;             /* opcode */
  51           len += (offset > 255 ? 2 : 1);
  52           len += (length > 255 ? 2 : 1);
  53         }
  54     }
  55
  56   return len;
  57 }
  58
  59
  60 static apr_off_t
  61 delta_window_print(const svn_txdelta_window_t *window,
  62                    const char *tag, FILE *stream)
  63 {
  64   const apr_off_t len = delta_window_size_estimate(window);
  65   apr_off_t op_offset = 0;
  66   int i;
  67
  68   if (!window)
  69     return 0;
  70
  71   fprintf(stream, "%s: (WINDOW %" APR_OFF_T_FMT, tag, len);
  72   fprintf(stream,
  73           " (%" SVN_FILESIZE_T_FMT
  74           " %" APR_SIZE_T_FMT " %" APR_SIZE_T_FMT ")",
  75           window->sview_offset, window->sview_len, window->tview_len);
  76   for (i = 0; i < window->num_ops; ++i)
  77     {
  78       apr_size_t const offset = window->ops[i].offset;
  79       apr_size_t const length = window->ops[i].length;
  80       apr_size_t tmp;
  81       switch (window->ops[i].action_code)
  82         {
  83         case svn_txdelta_source:
  84           fprintf(stream, "\n%s:   (%" APR_OFF_T_FMT " SRC %" APR_SIZE_T_FMT
  85                   " %" APR_SIZE_T_FMT ")", tag, op_offset, offset, length);
  86           break;
  87         case svn_txdelta_target:
  88           fprintf(stream, "\n%s:   (%" APR_OFF_T_FMT " TGT %" APR_SIZE_T_FMT
  89                   " %" APR_SIZE_T_FMT ")", tag, op_offset, offset, length);
  90           break;
  91         case svn_txdelta_new:
  92           fprintf(stream, "\n%s:   (%" APR_OFF_T_FMT " NEW %"
  93                   APR_SIZE_T_FMT " \"", tag, op_offset, length);
  94           for (tmp = offset; tmp < offset + length; ++tmp)
  95             {
  96               int const dat = window->new_data->data[tmp];
  97               if (apr_iscntrl(dat) || !apr_isascii(dat))
  98                 fprintf(stream, "\\%3.3o", dat & 0xff);
  99               else if (dat == '\\')
 100                 fputs("\\\\", stream);
 101               else
 102                 putc(dat, stream);
 103             }
 104           fputs("\")", stream);
 105           break;
 106         default:
 107           fprintf(stream, "\n%s:   (BAD-OP)", tag);
 108         }
 109
 110       op_offset += length;
 111     }
 112   fputs(")\n", stream);
 113   return len;
 114 }
 115
 116
 117 #endif /* SVN_DELTA_WINDOW_TEST_H */