src/lib/str-sanitize.c

	str-sanitize.c revision 37a5cee2b4362014d6c0f81c82b2f75d7a5204f6
/* Copyright (c) 2004 Timo Sirainen */

#include "lib.h"
#include "str.h"
#include "str-sanitize.h"

void str_sanitize_append(string_t *dest, const char *src, size_t max_len)
{
    const char *p;

    for (p = src; *p != '\0'; p++) {
        if (((unsigned char)*p & 0x7f) < 32)
            break;
    }

    str_append_n(dest, src, (size_t)(p - src));
    for (; *p != '\0' && max_len > 0; p++, max_len--) {
        if (((unsigned char)*p & 0x7f) < 32)
            str_append_c(dest, '?');
        else
            str_append_c(dest, *p);
    }

    if (*p != '\0') {
        str_truncate(dest, str_len(dest)-3);
        str_append(dest, "...");
    }
}

const char *str_sanitize(const char *src, size_t max_len)
{
    string_t *str;

    str = t_str_new(I_MIN(max_len, 256));
    str_sanitize_append(str, src, max_len);
    return str_c(str);
}