From 39c0cbcc70aff47e17107826aa76cb525c83b122 Mon Sep 17 00:00:00 2001
From: Adam Carpenter <gitlab@53hor.net>
Date: Tue, 9 Jul 2019 16:00:48 -0400
Subject: ch2

---
 ch1/no_trailers.c | 72 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100644 ch1/no_trailers.c

(limited to 'ch1/no_trailers.c')

diff --git a/ch1/no_trailers.c b/ch1/no_trailers.c
new file mode 100644
index 0000000..80dbc0f
--- /dev/null
+++ b/ch1/no_trailers.c
@@ -0,0 +1,72 @@
+#include<stdio.h>
+
+#define MAXLENGTH 1000
+
+int get_line(char line[], int maxlength);
+void strip_line(char line[], int length);
+void copy(char to[], char from[]);
+
+/*
+ * MAIN
+ * Removes all trailing whitespace and blank lines from STDIN.
+ */
+int main() {
+    int len; // current line length
+    char line[MAXLENGTH]; // current input line
+
+    while ((len = get_line(line, MAXLENGTH)) > 0) {
+        strip_line(line, len);
+        if (line[0] != '\0')
+            printf("%s\n", line);
+    }
+    return 0;
+}
+
+/*
+ * GET_LINE
+ * Read STDIN into LINE up to MAXLENGTH and return its length. 
+ * Returns the length of a the line.
+ */
+int get_line(char line[], int maxlength) {
+    int c, i;
+
+    for (i = 0; i < maxlength - 1 && (c = getchar()) != EOF && c != '\n'; ++i)
+        line[i] = c;
+    if (c == '\n') {
+        line[i] = c;
+        ++i;
+    }
+    line[i] = '\0';
+    return i;
+}
+
+/*
+ * STRIP_LINE
+ * Remove all whitespace from end of LINE of given LENGTH.
+ */
+void strip_line(char line[], int length) {
+    int i, c;
+
+    for (i = --length; i >= 0; --i) {
+        c = line[i];
+
+        if (c == ' ' || c == '\t' || c == '\n')
+            line[i] = '\0';
+        else 
+            break;
+    }
+}
+
+
+/*
+ * COPY
+ * Copy FROM into TO; assume TO is big enough.
+ */
+void copy(char to[], char from[]) {
+    int i;
+
+    i = 0;
+    while ((to[i] = from[i]) != '\0')
+        ++i;
+}
+
-- 
cgit v1.2.3