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#include "hfield.h"
static const 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(char *s, int len, const 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(char *s, int len)
{
int i;
const char *t;
for (i = 1; (t = hname[i]); ++i)
if (hmatch(s, len, t)) return i;
return 0;
}
int hfield_valid(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(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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