src/mime_header.cc

   1 /*
   2  * Copyright (C) 1996-2018 The Squid Software Foundation and contributors
   3  *
   4  * Squid software is distributed under GPLv2+ license and includes
   5  * contributions from numerous individuals and organizations.
   6  * Please see the COPYING and CONTRIBUTORS files for details.
   7  */
   8
   9 /* DEBUG: section 25    MiME Header Parsing */
  10
  11 #include "squid.h"
  12 #include "Debug.h"
  13 #include "profiler/Profiler.h"
  14
  15 size_t
  16 headersEnd(const char *mime, size_t l, bool &containsObsFold)
  17 {
  18     size_t e = 0;
  19     int state = 1;
  20     containsObsFold = false;
  21
  22     PROF_start(headersEnd);
  23
  24     while (e < l && state < 3) {
  25         switch (state) {
  26
  27         case 0:
  28
  29             if ('\n' == mime[e])
  30                 state = 1;
  31
  32             break;
  33
  34         case 1:
  35             if ('\r' == mime[e])
  36                 state = 2;
  37             else if ('\n' == mime[e])
  38                 state = 3;
  39             else if (' ' == mime[e] || '\t' == mime[e]) {
  40                 containsObsFold = true;
  41                 state = 0;
  42             } else
  43                 state = 0;
  44
  45             break;
  46
  47         case 2:
  48             if ('\n' == mime[e])
  49                 state = 3;
  50             else
  51                 state = 0;
  52
  53             break;
  54
  55         default:
  56             break;
  57         }
  58
  59         ++e;
  60     }
  61     PROF_stop(headersEnd);
  62
  63     if (3 == state)
  64         return e;
  65
  66     return 0;
  67 }
  68