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/* ISC license. */
#include <string.h>
#include <skalibs/bitarray.h>
#include <skalibs/stralloc.h>
#include "qmailr.h"
int qmailr_memcmp4 (void const *a, void const *b)
{
return memcmp(a, b, 4) ;
}
int qmailr_memcmp16 (void const *a, void const *b)
{
return memcmp(a, b, 16) ;
}
static inline int needsquoting (char const *s, size_t len)
{
static unsigned char const badchar[32] =
{
0xff, 0xff, 0xff, 0xff,
0x05, 0x13, 0x00, 0x5c,
0x01, 0x00, 0x00, 0x38,
0x00, 0x00, 0x00, 0x80,
0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff,
} ;
if (!len) return 1 ;
if (s[0] == '.' || s[len - 1] == '.') return 1 ;
for (size_t i = 0 ; i < len ; i++)
{
if (bitarray_peek(badchar, (unsigned char)s[i])) return 1 ;
if (i + 2 < len && s[i] == '.' && s[i+1] == '.') return 1 ;
}
return 0 ;
}
int qmailr_box_encode (char const *s, size_t len, stralloc *storage)
{
if (needsquoting(s, len))
{
size_t j = storage->len ;
if (!stralloc_readyplus(storage, 2 + (len << 1))) return 0 ;
storage->s[j++] = '"' ;
for (size_t i = 0 ; i < len ; i++)
{
if (strchr("\"\\\r\n", s[i])) storage->s[j++] = '\\' ;
storage->s[j++] = s[i] ;
}
storage->s[j++] = '"' ;
storage->len = j ;
}
else if (!stralloc_catb(storage, s, len)) return 0 ;
return 1 ;
}
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