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/* Copyright (c) 2002-2018 Pigeonhole authors, see the included COPYING file
*/
#include "lib.h"
#include "str.h"
#include "unichar.h"
#include "managesieve-parser.h"
#include "managesieve-quote.h"
/* Turn the value string into a valid MANAGESIEVE string or literal, no matter
* what. QUOTED-SPECIALS are escaped, but any invalid (UTF-8) character
* is simply removed. Linebreak characters are not considered invalid, but
* they do force the generation of a string literal.
*/
void managesieve_quote_append(string_t *str, const unsigned char *value,
size_t value_len, bool compress_lwsp)
{
size_t i, extra = 0, escape = 0;
string_t *tmp;
bool
last_lwsp = TRUE,
literal = FALSE,
modify = FALSE;
if (value == NULL) {
str_append(str, "\"\"");
return;
}
if (value_len == (size_t)-1)
value_len = strlen((const char *) value);
for (i = 0; i < value_len; i++) {
switch (value[i]) {
case ' ':
case '\t':
if (last_lwsp && compress_lwsp) {
modify = TRUE;
extra++;
}
last_lwsp = TRUE;
break;
case '"':
case '\\':
escape++;
last_lwsp = FALSE;
break;
case 13:
case 10:
literal = TRUE;
last_lwsp = TRUE;
break;
default:
last_lwsp = FALSE;
}
}
if (!literal) {
/* no linebreak chars, return as (escaped) "string" */
str_append_c(str, '"');
} else {
/* return as literal */
str_printfa(str, "{%zu}\r\n", value_len - extra);
}
tmp = t_str_new(value_len+escape+4);
if (!modify && (literal || escape == 0))
str_append_data(tmp, value, value_len);
else {
last_lwsp = TRUE;
for (i = 0; i < value_len; i++) {
switch (value[i]) {
case '"':
case '\\':
last_lwsp = FALSE;
if (!literal)
str_append_c(tmp, '\\');
str_append_c(tmp, value[i]);
break;
case ' ':
case '\t':
if (!last_lwsp || !compress_lwsp)
str_append_c(tmp, ' ');
last_lwsp = TRUE;
break;
case 13:
case 10:
last_lwsp = TRUE;
str_append_c(tmp, value[i]);
break;
default:
last_lwsp = FALSE;
str_append_c(tmp, value[i]);
break;
}
}
}
if ( uni_utf8_get_valid_data(str_data(tmp), str_len(tmp), str) )
str_append_str(str, tmp);
if (!literal)
str_append_c(str, '"');
}
char *managesieve_quote(pool_t pool, const unsigned char *value, size_t value_len)
{
string_t *str;
char *ret;
if (value == NULL)
return "\"\"";
T_BEGIN {
str = t_str_new(value_len + MAX_INT_STRLEN + 5);
managesieve_quote_append(str, value, value_len, TRUE);
ret = p_strndup(pool, str_data(str), str_len(str));
} T_END;
return ret;
}
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