tm1637 signs of life, terminal builtin cmds

[cortex-from-scratch] / lib / string.c

diff --git a/lib/string.c b/lib/string.c
index b1618b0..2edc71a 100644 (file)
--- a/lib/string.c
+++ b/lib/string.c
@@ -36,3 +36,26 @@ int strlen(const char *str)
     for(retval = 0; *str != '\0'; str++) retval++;
     return retval;
 }
+
+int strcmp(char * a, char * b) {
+
+       int alen = strlen(a);
+       int blen = strlen(b);
+
+       if (alen != blen)
+               return 0;
+
+       for (; alen != 0; alen--) {
+                       if (*a++ != *b++)
+                               return 0;
+       }
+       return 1;
+}
+
+char * strchr(const char *s, char c) {
+         for (; *s; s++)
+                 if (*s == c)
+                         return (char *) s;
+         return 0;
+}
+