Move sources under src/.

Makefile

@@ -3,16 +3,16 @@
 CC     = cc
 CFLAGS = -ansi -pedantic -Wall -Wextra -O3 -g3
 
-sources = enchive.c chacha.c curve25519-donna.c sha256.c
+sources = src/enchive.c src/chacha.c src/curve25519-donna.c src/sha256.c
 objects = $(sources:.c=.o)
-headers = config.h docs.h chacha.h sha256.h optparse.h
+headers = config.h src/docs.h src/chacha.h src/sha256.h src/optparse.h
 
 enchive: $(objects)
 	$(CC) $(LDFLAGS) -o $@ $(objects) $(LDLIBS)
-enchive.o: enchive.c config.h docs.h
-chacha.o: chacha.c config.h
-curve25519-donna.o: curve25519-donna.c config.h
-sha256.o: sha256.c config.h
+src/enchive.o: src/enchive.c config.h src/docs.h
+src/chacha.o: src/chacha.c config.h
+src/curve25519-donna.o: src/curve25519-donna.c config.h
+src/sha256.o: src/sha256.c config.h
 
 enchive-cli.c: $(sources) $(headers)
 	cat $(headers) $(sources) | sed -r 's@^(#include +".+)@/* \1 */@g' > $@

src/chacha.h

@@ -1,7 +1,7 @@
 #ifndef CHACHA_H
 #define CHACHA_H
 
-#include "config.h"
+#include "../config.h"
 
 #define CHACHA_BLOCKLENGTH 64
 

src/curve25519-donna.c

@@ -46,7 +46,7 @@
  * from the sample implementation. */
 
 #include <string.h>
-#include "config.h"
+#include "../config.h"
 
 /* Field element representation:
  *

src/enchive.c

@@ -1,4 +1,4 @@
-#include "config.h"
+#include "../config.h"
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>

src/sha256.h

@@ -10,7 +10,7 @@
 #define SHA256_H
 
 #include <stddef.h>
-#include "config.h"
+#include "../config.h"
 
 #define SHA256_BLOCK_SIZE 32