skroll

text scroller
git clone git://git.2f30.org/skroll.git
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commit 500beaf4df6c1e1ed6142da72b27737bc09cf2a0
parent a461c37ff4f157dac52481db02e84d4f86476b20
Author: z3bra <willy@mailoo.org>
Date:   Mon Mar 16 11:50:36 +0100

ladies & gentlemen, please applause UTF-8 SUPPORT !

Diffstat:
skroll.c | 13+++++++++++++
1 file changed, 13 insertions(+), 0 deletions(-)
diff --git a/skroll.c b/skroll.c @@ -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) { @@ -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); @@ -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 ! */