1 files changed, 32 insertions, 0 deletions
diff --git a/command_line/CmdLine/Src/OSLib/StringExtras.c b/command_line/CmdLine/Src/OSLib/StringExtras.c
index 04ef6b4..a4415ee 100644
--- a/command_line/CmdLine/Src/OSLib/StringExtras.c
+++ b/command_line/CmdLine/Src/OSLib/StringExtras.c
@@ -1,17 +1,49 @@
 #include "oslib.h"
 
 char *strcatn(char *d, const char *s, SInt32 max) {
+    char *p;
 
+    p = d + strlen(d);
+    while (*s && (p - d) + 1 < max)
+        *(p++) = *(s++);
+
+    *p = 0;
+    return d;
 }
 
 char *strcpyn(char *d, const char *s, SInt32 len, SInt32 max) {
+    char *p;
+
+    p = d;
+    while (len-- && *s && (p - d) + 1 < max)
+        *(p++) = *(s++);
 
+    *p = 0;
+    return d;
 }
 
 int ustrcmp(const char *src, const char *dst) {
+    int x;
 
+    do {
+        x = tolower(*src) - tolower(*(dst++));
+        if (x)
+            return x;
+    } while (*(src++));
+
+    return 0;
 }
 
 int ustrncmp(const char *src, const char *dst, UInt32 len) {
+    int x;
+
+    while (len--) {
+        x = tolower(*src) - tolower(*(dst++));
+        if (x)
+            return x;
+        if (!*(src++))
+            return 0;
+    }
 
+    return 0;
 }