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authorJohn Ankarström <john@ankarstrom.se>2021-07-12 17:30:47 +0200
committerJohn Ankarström <john@ankarstrom.se>2021-07-12 17:30:47 +0200
commitaf7821da81932a990ecc64a6381a90f3d6eaf5d2 (patch)
treeeb7c1dfe291b2daaaa6a72669578faa3dc5ca8e6 /etc
parentede252c175859041bfddf36983c4672bd756ecaa (diff)
downloadxutil-af7821da81932a990ecc64a6381a90f3d6eaf5d2.tar.gz
ce: Rewrite in C
The `build' program is available at http://git.ankarstrom.se/build/
Diffstat (limited to 'etc')
-rwxr-xr-xetc/ce28
-rw-r--r--etc/ce.c44
2 files changed, 44 insertions, 28 deletions
diff --git a/etc/ce b/etc/ce
deleted file mode 100755
index c00d1bf..0000000
--- a/etc/ce
+++ /dev/null
@@ -1,28 +0,0 @@
-#!/bin/sh
-
-# ce -- center text
-
-usage() { echo usage: $0 [cols] 1>&2; exit 1; }
-
-[ $# -gt 1 ] && usage
-
-if [ $# -eq 1 ]; then
- cols=${1#-}
- [ "$cols" -gt 0 ] || usage
- shift
-else
- cols=`tput cols`
- [ "$cols" -le 80 ] || cols=80
-fi
-
-while read line; do
- line=${line## }
- line=${line%% }
- len=`echo "$line" | wc -c`
- max=$(((cols - len) / 2))
- i=0
- while [ $((i++)) -lt $max ]; do
- printf ' '
- done
- echo "$line"
-done
diff --git a/etc/ce.c b/etc/ce.c
new file mode 100644
index 0000000..c8981bd
--- /dev/null
+++ b/etc/ce.c
@@ -0,0 +1,44 @@
+/*
+ * ce -- center text
+ * $ cc -O2 -o ce ce.c
+ */
+
+#include <err.h>
+#include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define MAXBUF 255
+
+int
+main(int argc, char *argv[])
+{
+ char *buf;
+ int cols, i, max;
+
+ if(argc-1 > 1){
+ fprintf(stderr, "usage: %s [cols]\n", argv[0]);
+ return 1;
+ }
+ cols = argv[1] ? atoi(argv[1]) : 80;
+
+ if(!(buf = malloc(MAXBUF)))
+ err(1, "malloc");
+
+ while(fgets(buf, MAXBUF, stdin)){
+ buf[strcspn(buf, "\n")] = 0;
+
+ /* Remove leading and trailing whitespace. */
+ for (; *buf; buf++)
+ if(!isspace(*buf)) break;
+ for (i = strlen(buf)-1; i >= 0; i--)
+ if(!isspace(buf[i])) break;
+ buf[i+1] = 0;
+
+ /* Calculate number of spaces. */
+ max = cols/2 + strlen(buf)/2;
+
+ printf("%*s\n", max, buf);
+ }
+}