Changeset ff3b3197 in mainline for generic/src/lib/func.c

Timestamp:

2005-11-25T22:58:38Z (20 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

f4338d2

Parents:

78c32b4

Message:

Implement basic kernel console command recognition.
Commands without arguments are now recognized.

File:

• generic/src/lib/func.c (modified) (2 diffs)

generic/src/lib/func.c

@@ -32 +32 @@
 #include <arch/asm.h>
 #include <arch.h>
+#include <typedefs.h>
 
 __u32   haltstate = 0; /**< Halt flag */
@@ -52 +53 @@
 }
 
+/** Return number of characters in a string.
+ *
+ * @param str NULL terminated string.
+ *
+ * @return Number of characters in str.
+ */
+size_t strlen(const char *str)
+{
+        int i;
+        
+        for (i = 0; str[i]; i++)
+                ;
+        
+        return i;
+}
 
 /** Compare two NULL terminated strings
  *
- * Do a char-by-char comparment of two NULL terminated strings.
- * The strings are considered equal iff they have the same
- * length and consist of the same characters.
+ * Do a char-by-char comparison of two NULL terminated strings.
+ * The strings are considered equal iff they consist of the same
+ * characters on the minimum of their lengths and specified maximal
+ * length.
  *
  * @param src First string to compare.
  * @param dst Second string to compare.
+ * @param len Maximal length for comparison.
  *
  * @return 0 if the strings are equal, 1 otherwise.
  *
  */
-int strcmp(const char *src, const char *dst)
+int strcmp(const char *src, const char *dst, size_t len)
 {
         int i;
         
         i = 0;
-        while (src[i] == dst[i]) {
-                if (src[i] == '\0')
+        while ((i < len) && (src[i] == dst[i])) {
+                if ((i == len - 1) || (src[i] == '\0'))
                         return 0;
                 i++;