when inserting file, check whole file to see if it is UTF-8.

git-svn-id: svn://sylpheed.sraoss.jp/sylpheed/trunk@1121 ee746299-78ed-0310-b773-934348b2243d

2 files changed, 52 insertions, 0 deletions

diff --git a/libsylph/codeconv.c b/libsylph/codeconv.c
index d7c726f0..981ca7f2 100644
--- a/libsylph/codeconv.c
+++ b/libsylph/codeconv.c
@@ -2467,6 +2467,56 @@ gint conv_copy_dir(const gchar *src, const gchar *dest, const gchar *encoding)
 	return 0;
 }
 
+CharSet conv_check_file_encoding(const gchar *file)
+{
+	FILE *fp;
+	gchar buf[BUFFSIZE];
+	CharSet enc;
+	const gchar *enc_str;
+	gboolean is_locale = TRUE, is_utf8 = TRUE;
+
+	g_return_val_if_fail(file != NULL, C_AUTO);
+
+	enc = conv_get_locale_charset();
+	enc_str = conv_get_locale_charset_str();
+	if (enc == C_UTF_8)
+		is_locale = FALSE;
+
+	if ((fp = g_fopen(file, "rb")) == NULL) {
+		FILE_OP_ERROR(file, "fopen");
+		return C_AUTO;
+	}
+
+	while (fgets(buf, sizeof(buf), fp) != NULL) {
+		gchar *str;
+		gint error = 0;
+
+		if (is_locale) {
+			str = conv_codeset_strdup_full(buf, enc_str,
+						       CS_INTERNAL, &error);
+			if (!str || error != 0)
+				is_locale = FALSE;
+			g_free(str);
+		}
+
+		if (is_utf8 && g_utf8_validate(buf, -1, NULL) == FALSE) {
+			is_utf8 = FALSE;
+		}
+
+		if (!is_locale && !is_utf8)
+			break;
+	}
+
+	fclose(fp);
+
+	if (is_locale)
+		return enc;
+	else if (is_utf8)
+		return C_UTF_8;
+	else
+		return C_AUTO;
+}
+
 gchar *conv_filename_from_utf8(const gchar *utf8_file)
 {
 	gchar *fs_file;
diff --git a/libsylph/codeconv.h b/libsylph/codeconv.h
index 700e83b0..4e79389f 100644
--- a/libsylph/codeconv.h
+++ b/libsylph/codeconv.h
@@ -241,6 +241,8 @@ gint conv_copy_dir			(const gchar	*src,
 					 const gchar	*dest,
 					 const gchar	*src_encoding);
 
+CharSet conv_check_file_encoding	(const gchar	*file);
+
 gchar *conv_filename_from_utf8		(const gchar	*utf8_file);
 gchar *conv_filename_to_utf8		(const gchar	*fs_file);