commit 39c8d624a1306f052a5a57d005ea7046f91028ab
Author: z3bra <willy@mailoo.org>
Date: Wed, 26 Mar 2014 13:28:16 +0100
First commit, first release
Diffstat:
| A | LICENSE | | | 14 | ++++++++++++++ |
| A | Makefile | | | 29 | +++++++++++++++++++++++++++++ |
| A | README | | | 20 | ++++++++++++++++++++ |
| A | config.mk | | | 10 | ++++++++++ |
| A | skroll.1 | | | 24 | ++++++++++++++++++++++++ |
| A | skroll.c | | | 110 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
6 files changed, 207 insertions(+), 0 deletions(-)
diff --git a/LICENSE b/LICENSE
@@ -0,0 +1,14 @@
+ DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
+ Version 2, December 2004
+
+ Copyright (C) 2004 Sam Hocevar <sam@hocevar.net>
+
+ Everyone is permitted to copy and distribute verbatim or modified
+ copies of this license document, and changing it is allowed as long
+ as the name is changed.
+
+ DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
+ TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+ 0. You just DO WHAT THE FUCK YOU WANT TO.
+
diff --git a/Makefile b/Makefile
@@ -0,0 +1,29 @@
+include config.mk
+
+.SUFFIXES: .c .o .gz
+.PHONY : all clean install uninstall
+
+.c.o:
+ @echo -e "CC $<"
+ @${CC} -c ${CFLAGS} $< -o $@
+
+skroll: skroll.o
+ @echo -e "LD skroll"
+ @${LD} $^ -o $@ ${LDFLAGS}
+
+skroll.1.gz: skroll.1
+ @echo "GZ $<"
+ @${GZ} -c $< > $@
+
+all : skroll skroll.1.gz
+
+clean :
+ ${RM} -f skroll *.o *.gz *~
+
+install: skroll skroll.1.gz
+ install -D -m 0755 skroll ${DESTDIR}${PREFIX}/bin/skroll
+ install -D -m 0644 skroll.1.gz ${DESTDIR}${MANPREFIX}/man1/skroll.1.gz
+
+uninstall:
+ ${RM} ${DESTDIR}${PREFIX}/bin/skroll
+ ${RM} ${DESTDIR}${MANPREFIX}/man1/skroll.1.gz
diff --git a/README b/README
@@ -0,0 +1,20 @@
+┏━┓╻┏ ┏━┓┏━┓╻ ╻
+┗━┓┣┻┓┣┳┛┃ ┃┃ ┃
+┗━┛╹ ╹╹┗╸┗━┛┗━╸┗━╸
+ -- by z3bra
+===========================
+
+Skroll is a small utility that you can use to make a text scroll.
+Pipe text to it, and it will scroll a given number of letters from right to
+left.
+
+You can pass a few options to it, to change its behavior:
+
+ # loop indefinitely
+ echo shblah | skroll -l
+
+ # output <n> chars at a time
+ echo shblah | skroll -n 3
+
+ # rotate letters every <x> seconds
+ echo shblah | skroll -d 0.25
diff --git a/config.mk b/config.mk
@@ -0,0 +1,10 @@
+# paths
+PREFIX:=/usr
+MANPREFIX:=${PREFIX}/share/man
+
+CC = cc
+LD= ${CC}
+RM = rm
+GZ = gzip
+CFLAGS = -Wall -pedantic
+LDFLAGS =
diff --git a/skroll.1 b/skroll.1
@@ -0,0 +1,24 @@
+.TH MAN 1 2014-04-26 "Linux" "skroll"
+.SH NAME
+skroll - make a given text scroll
+.SH SYNOPSIS
+.B skroll
+.RI [\| \-hl\| ]\ [\| -n\ num\| ]\ [\| -d\ delay\| ]
+.SH DESCRIPTION
+.PP
+.B skroll
+reads text on stdin and make it scroll to stdout
+.TP
+.B \-h
+Display a help text
+.B \-l
+Loop text forever
+.B \-n num
+Show <num> char at a time
+.B \-d delay
+Make scroll steps last <delay> seconds
+.SH BUGS
+.PP
+No bugs known actually. Feel free to report them at willy@mailoo.org
+.SH AUTHORS / CONTRIBUTORS
+Willy Goiffon is the main author.
diff --git a/skroll.c b/skroll.c
@@ -0,0 +1,110 @@
+/*
+ * DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
+ * Version 2, December 2004
+ *
+ * Copyright (C) 2004 Sam Hocevar <sam@hocevar.net>
+ *
+ * Everyone is permitted to copy and distribute verbatim or modified
+ * copies of this license document, and changing it is allowed as long
+ * as the name is changed.
+ *
+ * DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
+ * TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+ *
+ * 0. You just DO WHAT THE FUCK YOU WANT TO.
+ *
+ */
+
+#include <stdio.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <getopt.h>
+
+#define BUFFER_SIZE 512
+
+static bool loop = false; /* wether to loop text or not */
+static float delay = 1; /* scroll speed, in usec */
+static int number = 10; /* number of chars to be shown at the same time */
+
+void zero_fill (char **str, size_t num)
+{
+ int c;
+ size_t s;
+
+ s = strnlen((*str),num);
+
+ for (c=0; c<num; ++c) {
+ if ( (*str)[c] == '\n' || c >= s ) {
+ (*str)[c] = ' ';
+ }
+ }
+
+ (*str)[num] = 0;
+
+ return; /* void */
+}
+
+void skroll (const char *input)
+{
+ int offset = 0;
+ char *buf = NULL;
+
+ if ( !(buf = calloc (number, sizeof(char))) ) return;
+ buf[number] = 0;
+
+ do {
+ for (offset=0; input[offset]; ++offset) {
+ strncpy(buf, input + offset, number-1);
+ zero_fill(&buf, number);
+ printf("\r%s", buf);
+
+ fflush(stdout);
+ usleep(delay*1000000);
+ }
+ } while(loop);
+
+ putc('\n', stdout);
+
+ return; /* void */
+}
+
+const char *bufferize (FILE *stream)
+{
+ char *buf = NULL;
+
+ if ( !(buf = calloc (BUFFER_SIZE, sizeof(char))) ) return NULL;
+
+ buf[BUFFER_SIZE] = 0;
+
+ if ( feof(stream) || !fgets(buf, BUFFER_SIZE, stream) ) {
+ free (buf);
+ return NULL;
+ }
+
+ return buf;
+}
+
+int main (int argc, char **argv)
+{
+ char ch;
+ const char *buf = NULL;
+
+ while ( (ch = getopt(argc, argv, "hd:ln:")) != -1 ) {
+ switch (ch) {
+ case 'h':
+ printf("usage: %s [-hl] [-d delay] [-n number]", argv[0]);
+ break;
+ case 'd': delay = strtof(optarg, NULL); break;
+ case 'n': number = strtoul(optarg, NULL, 10); break;
+ case 'l': loop = true; break;
+ }
+ }
+
+ while( (buf = bufferize(stdin)) != NULL ) {
+ skroll(buf);
+ }
+
+ return 0;
+}
