chap7: add small programs made in chap7

Signed-off-by: Carlos Maiolino <[email protected]>

7 files changed, 26 insertions, 2 deletions

diff --git a/C/HF/chap7/ecat b/C/HF/chap7/ecat
new file mode 100755
index 0000000..eb19bfd
--- /dev/null
+++ b/C/HF/chap7/ecat
diff --git a/C/HF/chap7/ecat.c b/C/HF/chap7/ecat.c
index ec034e4..8ee5e6a 100644
--- a/C/HF/chap7/ecat.c
+++ b/C/HF/chap7/ecat.c
@@ -7,13 +7,15 @@ int main(int argc, char **argv)
 	FILE *fd;
 	char buf[80];
 
+	encrypt_arr_t fn_arr = {xor16, xor42, xor64};
 	if (argc != 2)
 		return 1;
 
+	printf("Arr size: %ld\n", sizeof(fn_arr) / sizeof(*fn_arr));
 	fd = fopen(argv[1], "r");
 
 	while (fgets(buf, 80, fd)) {
-		encrypt(buf, xor64);
+		encrypt_arr(buf, fn_arr, 3);
 		printf("%s", buf);
 	}
 
diff --git a/C/HF/chap7/encrypt.c b/C/HF/chap7/encrypt.c
index 1b5ce25..6c3eccd 100644
--- a/C/HF/chap7/encrypt.c
+++ b/C/HF/chap7/encrypt.c
@@ -1,6 +1,13 @@
 #include "encrypt.h"
-typedef void (*encrypt_fn_t)(char *message);
 
 void encrypt(char *message, encrypt_fn_t encrypt_fn) {
 	encrypt_fn(message);
 }
+
+void encrypt_arr(char *message, encrypt_arr_t fn_arr, int size)
+{
+	int i;
+
+	for (i = 0; i < size; i++)
+		encrypt(message, fn_arr[i]);
+}
diff --git a/C/HF/chap7/encrypt.h b/C/HF/chap7/encrypt.h
index 4e130e9..e70d8f6 100644
--- a/C/HF/chap7/encrypt.h
+++ b/C/HF/chap7/encrypt.h
@@ -2,6 +2,9 @@
 #define ENCRYPT_H
 
 typedef void (*encrypt_fn_t)(char *message);
+typedef void (*encrypt_arr_t[])(char *message);
+
 void encrypt(char *message, encrypt_fn_t);
+void encrypt_arr(char *message, encrypt_arr_t fn_arr, int size);
 
 #endif /* ENCRYPT_H */
diff --git a/C/HF/chap7/res.txt b/C/HF/chap7/res.txt
new file mode 100644
index 0000000..fbc8a19
--- /dev/null
+++ b/C/HF/chap7/res.txt
@@ -0,0 +1 @@
+(54;6>5p
diff --git a/C/HF/chap7/xor.c b/C/HF/chap7/xor.c
index 0efa3a4..ae5f0b2 100644
--- a/C/HF/chap7/xor.c
+++ b/C/HF/chap7/xor.c
@@ -1,6 +1,15 @@
 #include <stdio.h>
 #include "xor.h"
 
+void xor16(char *message)
+{
+	printf("Orig: %s\n", message);
+	while (*message) {
+		*message = *message ^ 16;
+		message++;
+	}
+}
+
 void xor42(char *message)
 {
 	printf("Orig: %s\n", message);
@@ -18,3 +27,4 @@ void xor64(char *message)
 		message++;
 	}
 }
+
diff --git a/C/HF/chap7/xor.h b/C/HF/chap7/xor.h
index 6f3de42..8dd8e17 100644
--- a/C/HF/chap7/xor.h
+++ b/C/HF/chap7/xor.h
@@ -1,6 +1,7 @@
 #ifndef XOR_H
 #define XOR_H
 
+void xor16(char *m);
 void xor42(char *m);
 void xor64(char *m);