1 files changed, 61 insertions, 0 deletions
diff --git a/ch5/5-11_detab-remixed.c b/ch5/5-11_detab-remixed.c
new file mode 100644
index 0000000..43bffb4
--- /dev/null
+++ b/ch5/5-11_detab-remixed.c
@@ -0,0 +1,61 @@
+#include <stdio.h>
+
+/* The C Programming Language: 2nd Edition
+ *
+ * Exercise 5-11: Modify the programs entab and detab (written as exercises in
+ * Chapter 1) to accept a list of tab stops as arguments. Use the default tab
+ * settings if there are no arguments.
+ */
+
+#define TABWIDTH 8
+
+int main(int argc, char *argv[]) {
+	int column, c, tabnum, stop;
+	column = 0;
+
+	if (argc > 1) {
+		tabnum = 1;
+		stop = atoi(argv[tabnum]);
+	} else {
+		tabnum = 0;
+	}
+
+	while ((c = getchar()) != EOF) {
+		if (c == '\t') {
+			if (argc > 1) {
+				// advance the argument if we're ahead of the last one
+				if (column > stop && tabnum < (argc -1)) {
+					stop = atoi(argv[++tabnum]);
+				}
+				// insert our spaces up to the tabstop
+				while (column <= stop) {
+					putchar(' ');
+					column++;
+				}
+				// advance the argument (again) if needed.
+				if (tabnum < (argc - 1)) {
+					stop = atoi(argv[++tabnum]);
+				}
+			} else {
+				// default tabstopping
+				while (column % TABWIDTH != 1) {
+					putchar(' ');
+					column++;
+				}
+			}
+		} else {
+			// reset counters and the arglist
+			if (c == '\n') {
+				column = 0;
+				if (tabnum > 0) {
+					tabnum = 1;
+					stop = atoi(argv[tabnum]);
+				}
+			}
+			putchar(c);
+			column++;
+		}
+	}
+
+	return 0;
+}