# HG changeset patch
# User Mike Becker <universe@uap-core.de>
# Date 1767191130 -3600
# Node ID c2d05cf1a0624a58462759bc604b3aa358bf6e47
# Parent  56731bb98508fc4a2b2e26c30e02783ecd131336
fix that Microsoft's _strnicmp crashes when a string is NULL although count == 0

diff -r 56731bb98508 -r c2d05cf1a062 src/string.c
--- a/src/string.c	Wed Dec 31 15:11:12 2025 +0100
+++ b/src/string.c	Wed Dec 31 15:25:30 2025 +0100
@@ -41,7 +41,12 @@
 #include <ctype.h>
 
 #ifdef _WIN32
-#define cx_strcasecmp_impl _strnicmp
+static int cx_fixed_strnicmp(const char* s1, const char* s2, size_t count) {
+    // Microsoft's implementation crashes when count == 0 and either string is NULL
+    if (count == 0) return 0;
+    return _strnicmp(s1, s2, count);
+}
+#define cx_strcasecmp_impl cx_fixed_strnicmp
 #else
 #include <strings.h>
 #define cx_strcasecmp_impl strncasecmp
diff -r 56731bb98508 -r c2d05cf1a062 tests/test_string.c
--- a/tests/test_string.c	Wed Dec 31 15:11:12 2025 +0100
+++ b/tests/test_string.c	Wed Dec 31 15:25:30 2025 +0100
@@ -343,7 +343,7 @@
 
     CX_TEST_DO {
         // the entire string
-        for (size_t i = 0; i < str.length; i++) {
+        for (off_t i = 0; i < str.length; i++) {
             CX_TEST_ASSERT(cx_strat(str, i) == str.ptr[i]);
         }
         // the entire string backwards