Mercurial > dovecot > core-2.2
view src/lib/str-sanitize.c @ 17130:add8c00fb3cc
Updated copyright notices to include year 2014.
author | Timo Sirainen <tss@iki.fi> |
---|---|
date | Tue, 04 Feb 2014 16:23:22 -0500 |
parents | 36ef72481934 |
children | 3009a1a6f6d5 |
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/* Copyright (c) 2004-2014 Dovecot authors, see the included COPYING file */ #include "lib.h" #include "unichar.h" #include "str.h" #include "str-sanitize.h" static size_t str_sanitize_skip_start(const char *src, size_t max_len) { unsigned int len; unichar_t chr; size_t i; for (i = 0; i < max_len; ) { len = uni_utf8_char_bytes(src[i]); if (uni_utf8_get_char(src+i, &chr) <= 0) break; if ((unsigned char)src[i] < 32) break; i += len; } return i; } void str_sanitize_append(string_t *dest, const char *src, size_t max_len) { unsigned int len; unichar_t chr; size_t i; int ret; for (i = 0; i < max_len && src[i] != '\0'; ) { len = uni_utf8_char_bytes(src[i]); ret = uni_utf8_get_char(src+i, &chr); if (ret <= 0) { /* invalid UTF-8 */ str_append_c(dest, '?'); if (ret == 0) { /* input ended too early */ return; } i++; continue; } if ((unsigned char)src[i] < 32) str_append_c(dest, '?'); else str_append_c(dest, src[i]); i += len; } if (src[i] != '\0') { str_truncate(dest, str_len(dest) <= 3 ? 0 : str_len(dest)-3); str_append(dest, "..."); } } const char *str_sanitize(const char *src, size_t max_len) { string_t *str; size_t i; if (src == NULL) return NULL; i = str_sanitize_skip_start(src, max_len); if (src[i] == '\0') return src; str = t_str_new(I_MIN(max_len, 256)); str_append_n(str, src, i); str_sanitize_append(str, src + i, max_len - i); return str_c(str); }