src/lib-imap/imap-quote.c

	imap-quote.c revision 78e5f169ab229c4122380b036b9242b87ddc9686
/* Copyright (C) 2002 Timo Sirainen */

#include "lib.h"
#include "str.h"
#include "imap-quote.h"

void imap_quote_append(string_t *str, const unsigned char *value,
               size_t value_len)
{
    size_t i;
    int literal = FALSE;

    for (i = 0; i < value_len; i++) {
        if (value[i] == 0) {
            value_len = i;
            break;
        }

        if ((value[i] & 0x80) != 0)
            literal = TRUE;
    }

    if (!literal) {
        /* no 8bit chars, return as "string" */
        str_append_c(str, '"');
        str_append_n(str, value, value_len);
        str_append_c(str, '"');
    } else {
        /* return as literal */
        str_printfa(str, "{%"PRIuSIZE_T"}\r\n", value_len);
        str_append_n(str, value, value_len);
    }
}

const char *imap_quote_str_nil(const char *value)
{
    string_t *str;

    if (value == NULL)
        return "NIL";

    str = t_str_new(512);
    imap_quote_append(str, (const unsigned char *) value, (size_t)-1);
    return str_c(str);
}

char *imap_quote(pool_t pool, const unsigned char *value, size_t value_len)
{
    string_t *str;

    str = t_str_new(value_len + MAX_INT_STRLEN + 5);
    imap_quote_append(str, value, value_len);
    return p_strndup(pool, str_data(str), str_len(str));
}