add lc version, various improvements.

README.md

@@ -30,9 +30,18 @@ The plan9port version of wc ([github](https://github.com/9fans/plan9port/blob/ma
   - ~~Maybe make some pull requests, if I'm doing something better? => doesn't seem like it~~
 - [ ] Install to ww, but check that ww is empty (installing to wc2 or smth would mean that you don't save that many keypresses vs wc -w)
 - ~~[ ] Could use zig? => Not for now~~
-- [ ] Look specifically at how other versions
+- [ ] Look specifically at how other versions do stuff.
   - [ ] Distinguish between reading from stdin and reading from a file
     - If it doesn't have arguments, read from stdin. 
   - [ ] Open files, read characters.
 - [ ] Write version that counts lines
 - [ ] Document reading from user-inputed stdin (end with Ctrl+D)
+- [ ] Write man files?
+- [ ] Write a version for other coreutils? <https://git.busybox.net/busybox/tree/coreutils/>? Would be a really nice project. 
+  - Simple utils.
+- zig?
+- https://github.com/leecannon/zig-coreutils
+- https://github.com/keiranrowan/tiny-core/tree/master
+- [x] Add lc
+  - Take into account what happens if file doesn't end in newline.
+- [ ] add chc (cc is "c compiler")

lc/lc.c

@@ -0,0 +1,35 @@
+#include <stdio.h>
+#include <unistd.h>
+
+int lc(FILE* fp)
+{
+    char c[1];
+    int num_lines = 0;
+	  int fn = fileno(fp);
+    while (read(fn, c, sizeof(c)) > 0) {
+        if (*c == '\n' ) {
+					num_lines ++;
+        }
+    }
+    printf("%i\n", num_lines);
+    return 0;
+}
+
+int main(int argc, char** argv)
+{
+    if (argc == 1) {
+        return lc(stdin);
+    } else if (argc > 1) {
+        FILE* fp = fopen(argv[1], "r");
+        if (!fp) {
+            perror("Could not open file");
+            return 1;
+        }
+				return lc(fp) && fclose(fp);
+    } else {
+        printf("Usage: lc file.txt\n");
+        printf("   or: cat file.txt | lc\n");
+        printf("   or: lc # read from user-inputted stdin\n");
+    }
+    return 0;
+}

lc/makefile

@@ -8,8 +8,8 @@ CC=gcc
 # CC=tcc # <= faster compilation
 
 # Main file
-SRC=ww.c
-OUT=ww
+SRC=lc.c
+OUT=lc
 
 ## Flags
 DEBUG= #'-g'
@@ -34,7 +34,7 @@ install:
 
 test: $(OUT)
 	/bin/echo -e "123\n45 67" | ./$(OUT)
-	/bin/echo -n "" | ./ww
+	/bin/echo -n "" | ./lc
 	/bin/echo "  xx x" | ./$(OUT) -w
 	./$(OUT) $(SRC)
 	./$(OUT) nonexistent_file || true

wc/makefile

@@ -0,0 +1,40 @@
+# Interface: 
+#   make
+#   make build
+#   make format
+
+# Compiler
+CC=gcc
+# CC=tcc # <= faster compilation
+
+# Main file
+SRC=wc.c
+OUT=wc
+
+## Flags
+DEBUG= #'-g'
+STANDARD=-std=c99
+WARNINGS=-Wall
+OPTIMIZED=-O3
+# OPTIMIZED=-O3  #-Ofast
+
+## Formatter
+STYLE_BLUEPRINT=webkit
+FORMATTER=clang-format -i -style=$(STYLE_BLUEPRINT)
+
+## make build
+build: $(SRC)
+	$(CC) $(OPTIMIZED) $(DEBUG) $(SRC) -o $(OUT)
+
+format: $(SRC)
+	$(FORMATTER) $(SRC)
+
+install:
+	cp -n $(OUT) /bin/ww ## don't overwrite old standard wc.
+
+test: $(OUT)
+	/bin/echo -e "123\n45 67" | ./$(OUT)
+	/bin/echo -n "" | ./wc
+	/bin/echo "  xx x" | ./$(OUT) -w
+	./$(OUT) $(SRC)
+	./$(OUT) nonexistent_file || true

wc/wc.c

@@ -33,9 +33,9 @@ int main(int argc, char** argv)
         }
 				return wc(fp) && fclose(fp);
     } else {
-        printf("Usage: ww file.txt\n");
-        printf("   or: cat file.txt | ww\n");
-        printf("   or: ww # read from user-inputted stdin\n");
+        printf("Usage: wc file.txt\n");
+        printf("   or: cat file.txt | wc\n");
+        printf("   or: wc # read from user-inputted stdin\n");
     }
     return 0;
 }