Git Review Changes Operations
After viewing the commit details, Jerry realizes that the string length cannot be negative, that’s why he decides to change the return type of my_strlen function.
Jerry uses the git log command to view log details.
[jerry@CentOS project]$ git log
The above command will produce the following result.
commit cbe1249b140dad24b2c35b15cc7e26a6f02d2277 Author: Jerry Mouse <jerry@WebMagicInformatica.com> Date: Wed Sep 11 08:05:26 2013 +0530 Implemented my_strlen function
Jerry uses the git show command to view the commit details. The git show command takes SHA-1 commit ID as a parameter.
[jerry@CentOS project]$ git show cbe1249b140dad24b2c35b15cc7e26a6f02d2277
The above command will produce the following result −
commit cbe1249b140dad24b2c35b15cc7e26a6f02d2277
Author: Jerry Mouse <jerry@WebMagicInformatica.com>
Date: Wed Sep 11 08:05:26 2013 +0530
Implemented my_strlen function
diff --git a/string.c b/string.c
new file mode 100644
index 0000000..187afb9
--- /dev/null
+++ b/string.c
@@ -0,0 +1,24 @@
+#include <stdio.h>
+
+int my_strlen(char *s)
+{
+
char *p = s;
+
+
while (*p)
+ ++p;
+ return (p -s );
+
}
+
He changes the return type of the function from int to size_t. After testing the code, he reviews his changes by running the git diff command.
[jerry@CentOS project]$ git diff
The above command will produce the following result −
diff --git a/string.c b/string.c
index 187afb9..7da2992 100644
--- a/string.c
+++ b/string.c
@@ -1,6 +1,6 @@
#include <stdio.h>
-int my_strlen(char *s)
+size_t my_strlen(char *s)
{
char *p = s;
@@ -18,7 +18,7 @@ int main(void)
};
for (i = 0; i < 2; ++i)
{
- printf("string lenght of %s = %d\n", s[i], my_strlen(s[i]));
+ printf("string lenght of %s = %lu\n", s[i], my_strlen(s[i]));
return 0;
}
Git diff shows ‘+’ sign before lines, which are newly added and ‘−’ for deleted lines.
