src/mime_header.cc

   1 /*
   2  * Copyright (C) 1996-2023 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/Stream.h"
  13 #include "mime_header.h"
  14 #include "sbuf/SBuf.h"
  15
  16 size_t
  17 headersEnd(const char *mime, size_t l, bool &containsObsFold)
  18 {
  19     size_t e = 0;
  20     int state = 1;
  21     containsObsFold = false;
  22
  23     while (e < l && state < 3) {
  24         switch (state) {
  25
  26         case 0:
  27
  28             if ('\n' == mime[e])
  29                 state = 1;
  30
  31             break;
  32
  33         case 1:
  34             if ('\r' == mime[e])
  35                 state = 2;
  36             else if ('\n' == mime[e])
  37                 state = 3;
  38             else if (' ' == mime[e] || '\t' == mime[e]) {
  39                 containsObsFold = true;
  40                 state = 0;
  41             } else
  42                 state = 0;
  43
  44             break;
  45
  46         case 2:
  47             if ('\n' == mime[e])
  48                 state = 3;
  49             else
  50                 state = 0;
  51
  52             break;
  53
  54         default:
  55             break;
  56         }
  57
  58         ++e;
  59     }
  60
  61     if (3 == state)
  62         return e;
  63
  64     return 0;
  65 }
  66
  67 size_t
  68 headersEnd(const SBuf &buf, bool &containsObsFold)
  69 {
  70     return headersEnd(buf.rawContent(), buf.length(), containsObsFold);
  71 }
  72