Merge pull request #4 from Richard-Qin-001/dev/shell

Rebuilt the system's underlying structure; it is now stable enough to merge. 

The system now supports a read-only file system and has a simple shell implemented.

1 files changed, 13 insertions, 0 deletions

diff --git a/src/lib/string.cc b/src/lib/string.cc
index bbd079d..a302fc6 100644
--- a/src/lib/string.cc
+++ b/src/lib/string.cc
@@ -69,3 +69,16 @@ int strcmp(const char *s1, const char *s2)
     }
     return *(const unsigned char *)s1 - *(const unsigned char *)s2;
 }
+
+int strcasecmp(const char *s1, const char *s2)
+{
+    while (*s1)
+    {
+        if(*s1 == *s2 || *s1 + 32 == *s2 || *s1 == *s2 + 32){
+            s1++;
+            s2++;
+        }
+        else break;
+    }
+    return *(const unsigned char *)s1 - *(const unsigned char *)s2;
+}
\ No newline at end of file