tladies & gentlemen, please applause UTF-8 SUPPORT ! - skroll - scroll a text to stdout
(HTM) git clone git://z3bra.org/skroll
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---
(DIR) commit 500beaf4df6c1e1ed6142da72b27737bc09cf2a0
(DIR) parent a461c37ff4f157dac52481db02e84d4f86476b20
(HTM) Author: z3bra <willy@mailoo.org>
Date: Mon, 16 Mar 2015 11:50:36 +0100
ladies & gentlemen, please applause UTF-8 SUPPORT !
Diffstat:
M skroll.c | 13 +++++++++++++
1 file changed, 13 insertions(+), 0 deletions(-)
---
(DIR) diff --git a/skroll.c b/skroll.c
t@@ -28,6 +28,12 @@ static bool loop = false; /* wether to loop text or not */
static float delay = 0.1; /* scroll speed, in seconds */
static int number = 20; /* number of chars to be shown at the same time */
+/* return the len of an utf-8 character */
+int utf8_len(unsigned char c)
+{
+ return c<192 ? 0 : c<224 ? 1 : c<240 ? 2 : 3;
+}
+
/* scroll <input> to stdout */
void skroll (const char *input)
{
t@@ -44,6 +50,8 @@ void skroll (const char *input)
*/
for (offset = 0; input[offset + number] != 0; offset++)
{
+ /* increase the message's length in case of utf-8 chars */
+ number += utf8_len(input[offset + number - 1]);
/* print out `number` characters from the buffer ! */
write(1, input + offset, number);
t@@ -53,6 +61,11 @@ void skroll (const char *input)
/* flush stdout, and wait for the next step */
fflush(stdout);
+
+ /* decrease message's length when utf-8 chars disappear to the left */
+ number -= utf8_len(input[offset]);
+ offset += utf8_len(input[offset]);
+
usleep(delay*1000000);
}
/* magnolia ? FOWEVA ! */