1 files changed, 99 insertions, 0 deletions
diff --git a/src/lib-charset/charset-utf8.c b/src/lib-charset/charset-utf8.c
new file mode 100644
index 0000000..22038e5
--- /dev/null
+++ b/src/lib-charset/charset-utf8.c
@@ -0,0 +1,99 @@
+/* Copyright (c) 2002-2018 Dovecot authors, see the included COPYING file */
+
+#include "lib.h"
+#include "buffer.h"
+#include "str.h"
+#include "charset-utf8-private.h"
+
+#include <ctype.h>
+
+#ifdef HAVE_ICONV
+const struct charset_utf8_vfuncs *charset_utf8_vfuncs = &charset_iconv;
+#else
+const struct charset_utf8_vfuncs *charset_utf8_vfuncs = &charset_utf8only;
+#endif
+
+bool charset_is_utf8(const char *charset)
+{
+	return strcasecmp(charset, "us-ascii") == 0 ||
+		strcasecmp(charset, "ascii") == 0 ||
+		strcasecmp(charset, "UTF-8") == 0 ||
+		strcasecmp(charset, "UTF8") == 0;
+}
+
+int charset_to_utf8_str(const char *charset, normalizer_func_t *normalizer,
+			const char *input, string_t *output,
+			enum charset_result *result_r)
+{
+	struct charset_translation *t;
+	size_t len = strlen(input);
+
+	if (charset_to_utf8_begin(charset, normalizer, &t) < 0)
+		return -1;
+
+	*result_r = charset_to_utf8(t, (const unsigned char *)input,
+				    &len, output);
+	charset_to_utf8_end(&t);
+	return 0;
+}
+
+struct charset_translation *
+charset_utf8_to_utf8_begin(normalizer_func_t *normalizer)
+{
+	struct charset_translation *trans;
+
+	if (charset_to_utf8_begin("UTF-8", normalizer, &trans) < 0)
+		i_unreached();
+	return trans;
+}
+
+enum charset_result
+charset_utf8_to_utf8(normalizer_func_t *normalizer,
+		     const unsigned char *src, size_t *src_size, buffer_t *dest)
+{
+	enum charset_result res = CHARSET_RET_OK;
+	size_t pos;
+
+	uni_utf8_partial_strlen_n(src, *src_size, &pos);
+	if (pos < *src_size) {
+		i_assert(*src_size - pos <= CHARSET_MAX_PENDING_BUF_SIZE);
+		*src_size = pos;
+		res = CHARSET_RET_INCOMPLETE_INPUT;
+	}
+
+	if (normalizer != NULL) {
+		if (normalizer(src, *src_size, dest) < 0)
+			return CHARSET_RET_INVALID_INPUT;
+	} else if (!uni_utf8_get_valid_data(src, *src_size, dest)) {
+		return CHARSET_RET_INVALID_INPUT;
+	} else {
+		buffer_append(dest, src, *src_size);
+	}
+	return res;
+}
+
+int charset_to_utf8_begin(const char *charset, normalizer_func_t *normalizer,
+			  struct charset_translation **t_r)
+{
+	return charset_utf8_vfuncs->to_utf8_begin(charset, normalizer, t_r);
+}
+
+void charset_to_utf8_end(struct charset_translation **_t)
+{
+	struct charset_translation *t = *_t;
+
+	*_t = NULL;
+	charset_utf8_vfuncs->to_utf8_end(t);
+}
+
+void charset_to_utf8_reset(struct charset_translation *t)
+{
+	charset_utf8_vfuncs->to_utf8_reset(t);
+}
+
+enum charset_result
+charset_to_utf8(struct charset_translation *t,
+		const unsigned char *src, size_t *src_size, buffer_t *dest)
+{
+	return charset_utf8_vfuncs->to_utf8(t, src, src_size, dest);
+}