1 #include "hfield.h"

     2 

     3 static char *(hname[]) = {

     4   "unknown-header"

     5 , "sender"

     6 , "from"

     7 , "reply-to"

     8 , "to"

     9 , "cc"

    10 , "bcc"

    11 , "date"

    12 , "message-id"

    13 , "subject"

    14 , "resent-sender"

    15 , "resent-from"

    16 , "resent-reply-to"

    17 , "resent-to"

    18 , "resent-cc"

    19 , "resent-bcc"

    20 , "resent-date"

    21 , "resent-message-id"

    22 , "return-receipt-to"

    23 , "errors-to"

    24 , "apparently-to"

    25 , "received"

    26 , "return-path"

    27 , "delivered-to"

    28 , "content-length"

    29 , "content-type"

    30 , "content-transfer-encoding"

    31 , "notice-requested-upon-delivery-to"

    32 , "mail-followup-to"

    33 , 0

    34 };

    35 

    36 static int hmatch(s,len,t)

    37 char *s;

    38 int len;

    39 char *t;

    40 {

    41  int i;

    42  char ch;

    43 

    44  for (i = 0;ch = t[i];++i)

    45   {

    46    if (i >= len) return 0;

    47    if (ch != s[i])

    48     {

    49      if (ch == '-') return 0;

    50      if (ch - 32 != s[i]) return 0;

    51     }

    52   }

    53  for (;;)

    54   {

    55    if (i >= len) return 0;

    56    ch = s[i];

    57    if (ch == ':') return 1;

    58    if ((ch != ' ') && (ch != '\t')) return 0;

    59    ++i;

    60   }

    61 }

    62 

    63 int hfield_known(s,len)

    64 char *s;

    65 int len;

    66 {

    67  int i;

    68  char *t;

    69 

    70  for (i = 1;t = hname[i];++i)

    71    if (hmatch(s,len,t))

    72      return i;

    73  return 0;

    74 }

    75 

    76 int hfield_valid(s,len)

    77 char *s;

    78 int len;

    79 {

    80  int i;

    81  int j;

    82  char ch;

    83 

    84  for (j = 0;j < len;++j)

    85    if (s[j] == ':')

    86      break;

    87  if (j >= len) return 0;

    88  while (j)

    89   {

    90    ch = s[j - 1];

    91    if ((ch != ' ') && (ch != '\t'))

    92      break;

    93    --j;

    94   }

    95  if (!j) return 0;

    96 

    97  for (i = 0;i < j;++i)

    98   {

    99    ch = s[i];

   100    if (ch <= 32) return 0;

   101    if (ch >= 127) return 0;

   102   }

   103  return 1;

   104 }

   105 

   106 unsigned int hfield_skipname(s,len)

   107 char *s;

   108 int len;

   109 {

   110  int i;

   111  char ch;

   112 

   113  for (i = 0;i < len;++i)

   114    if (s[i] == ':')

   115      break;

   116  if (i < len) ++i;

   117  while (i < len)

   118   {

   119    ch = s[i];

   120    if ((ch != '\t') && (ch != '\n') && (ch != '\r') && (ch != ' '))

   121      break;

   122    ++i;

   123   }

   124  return i;

   125 }