1 files changed, 32 insertions, 0 deletions
diff --git a/src/libstddjb/case_str.c b/src/libstddjb/case_str.c
new file mode 100644
index 0000000..14409c3
--- /dev/null
+++ b/src/libstddjb/case_str.c
@@ -0,0 +1,32 @@
+/* ISC license. */
+
+#include <skalibs/config.h>
+#include <skalibs/sysdeps.h>
+
+#if defined(SKALIBS_HASSTRCASESTR) && !defined(SKALIBS_FLAG_REPLACE_LIBC)
+
+#include <skalibs/nonposix.h>
+#include <string.h>
+#include <skalibs/bytestr.h>
+
+unsigned int case_str (char const *haystack, char const *needle)
+{
+  register char *p = strcasestr(haystack, needle) ;
+  return p ? p - haystack : str_len(haystack) ;
+}
+
+#else
+
+#include <skalibs/bytestr.h>
+
+unsigned int case_str (char const *haystack, char const *needle)
+{
+  unsigned int nlen = str_len(needle) ;
+  register char const *p = haystack ;
+  if (!nlen) return 0 ;
+  for (; *p ; p++)
+    if (!case_diffb(p, nlen, needle)) return p - haystack ;
+  return str_len(haystack) ;
+}
+
+#endif