workbench/libs/identify/idestimateformatsize.c

   1 /*
   2  * Copyright (c) 2010-2011 Matthias Rustler
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included
  12  * in all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  15  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  17  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  19  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  20  * IN THE SOFTWARE.
  21  *
  22  * $Id$
  23  */
  24
  25 #include "identify_intern.h"
  26
  27 static STRPTR finddollar(TEXT *t);
  28
  29 /*****************************************************************************
  30
  31     NAME */
  32 #include <proto/identify.h>
  33
  34         AROS_LH2(ULONG, IdEstimateFormatSize,
  35
  36 /*  SYNOPSIS */
  37         AROS_LHA(STRPTR          , string, A0),
  38         AROS_LHA(struct TagItem *, tags  , A1),
  39
  40 /*  LOCATION */
  41         struct IdentifyBaseIntern *, IdentifyBase, 12, Identify)
  42
  43 /*  FUNCTION
  44         Estimates the size of the buffer that will contain the output
  45         of the format string when used on IdFormatString().
  46
  47     INPUTS
  48         String  -- (STRPTR) Format string
  49         Tags    -- (struct TagItem *) Tags, currently NULL or TAG_DONE.
  50
  51     RESULT
  52         Length  -- (ULONG) Length of the buffer size that will
  53                    be able to hold the entire result.
  54
  55     TAGS
  56         None yet.
  57
  58     NOTES
  59         The returned size will be large enough to contain the result
  60         of a IdFormatString(). It is not necessarily the size of the
  61         resulting buffer (the result length of IdFormatString()).
  62
  63     EXAMPLE
  64
  65     BUGS
  66
  67     SEE ALSO
  68         IdHardware(), IdFormatString()
  69
  70     INTERNALS
  71
  72     HISTORY
  73
  74
  75 *****************************************************************************/
  76 {
  77     AROS_LIBFUNC_INIT
  78
  79     // no tags
  80
  81     TEXT *from = string;
  82     ULONG result = 1;
  83
  84     if (from == NULL)
  85     {
  86         return 0;
  87     }
  88
  89     while (*from)
  90     {
  91         if (*from == '$')
  92         {
  93             from++;
  94             if (*from == '$')
  95             {
  96                 from++;
  97                 result++;
  98             }
  99             else
 100             {
 101                 from = finddollar(from);
 102                 result += STRBUFSIZE;
 103             }
 104         }
 105         else
 106         {
 107             result++;
 108             from++;
 109         }
 110     }
 111
 112     return result;
 113
 114     AROS_LIBFUNC_EXIT
 115 } /* IdEstimateFormatSize */
 116
 117
 118 static STRPTR finddollar(TEXT *t)
 119 {
 120     while (*t && *t != '$')
 121     {
 122         t++;
 123     }
 124
 125     if (*t) // '$'
 126     {
 127         return t + 1;
 128     }
 129     else
 130     {
 131         return t;
 132     }
 133 }