From 49f68fd22b49386494eb0162cb115a5b6b2a9a1e Mon Sep 17 00:00:00 2001 From: "Richard M. Stallman" Date: Mon, 26 Nov 2001 20:10:04 +0000 Subject: [PATCH 1/1] (set_text_properties_1): Allow args in either order. Do nothing if range is empty. --- src/textprop.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/src/textprop.c b/src/textprop.c index cd07484204..7c6a5e6d68 100644 --- a/src/textprop.c +++ b/src/textprop.c @@ -1304,7 +1304,7 @@ set_text_properties (start, end, properties, object, signal_after_change_p) the text. This does not obey any hooks. You can provide the interval that START is located in as I, or pass NULL for I and this function will find it. - This function assumes that START < END. */ + START and END can be in any order. */ void set_text_properties_1 (start, end, properties, buffer, i) @@ -1317,7 +1317,14 @@ set_text_properties_1 (start, end, properties, buffer, i) s = XINT (start); len = XINT (end) - s; - eassert (len > 0); + if (len == 0) + return; + if (len < 0) + { + s = s + len; + len = - len; + } + if (i == 0) i = find_interval (BUF_INTERVALS (XBUFFER (buffer)), s); -- 2.39.2