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#include "hfield.h"
static char *(hname[]) = {
"unknown-header"
, "sender"
, "from"
, "reply-to"
, "to"
, "cc"
, "bcc"
, "date"
, "message-id"
, "subject"
, "resent-sender"
, "resent-from"
, "resent-reply-to"
, "resent-to"
, "resent-cc"
, "resent-bcc"
, "resent-date"
, "resent-message-id"
, "return-receipt-to"
, "errors-to"
, "apparently-to"
, "received"
, "return-path"
, "delivered-to"
, "content-length"
, "content-type"
, "content-transfer-encoding"
, "notice-requested-upon-delivery-to"
, "mail-followup-to"
, 0
};
static int hmatch(s,len,t)
char *s;
int len;
char *t;
{
int i;
char ch;
for (i = 0;ch = t[i];++i)
{
if (i >= len) return 0;
if (ch != s[i])
{
if (ch == '-') return 0;
if (ch - 32 != s[i]) return 0;
}
}
for (;;)
{
if (i >= len) return 0;
ch = s[i];
if (ch == ':') return 1;
if ((ch != ' ') && (ch != '\t')) return 0;
++i;
}
}
int hfield_known(s,len)
char *s;
int len;
{
int i;
char *t;
for (i = 1;t = hname[i];++i)
if (hmatch(s,len,t))
return i;
return 0;
}
int hfield_valid(s,len)
char *s;
int len;
{
int i;
int j;
char ch;
for (j = 0;j < len;++j)
if (s[j] == ':')
break;
if (j >= len) return 0;
while (j)
{
ch = s[j - 1];
if ((ch != ' ') && (ch != '\t'))
break;
--j;
}
if (!j) return 0;
for (i = 0;i < j;++i)
{
ch = s[i];
if (ch <= 32) return 0;
if (ch >= 127) return 0;
}
return 1;
}
unsigned int hfield_skipname(s,len)
char *s;
int len;
{
int i;
char ch;
for (i = 0;i < len;++i)
if (s[i] == ':')
break;
if (i < len) ++i;
while (i < len)
{
ch = s[i];
if ((ch != '\t') && (ch != '\n') && (ch != '\r') && (ch != ' '))
break;
++i;
}
return i;
}
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