started to add string.h replacements

1 files changed, 49 insertions, 0 deletions

diff --git a/src/port/string.c b/src/port/string.c
index c059431..01c5228 100644
--- a/src/port/string.c
+++ b/src/port/string.c
@@ -69,3 +69,52 @@ int wolf_port_strerror_r( int num, char *buf, size_t buflen ) {
 }
 
 #endif /* !defined HAVE_STRERROR_R */
+
+/**
+ * str(n)casecmp is always around but on very old or strance C libraries.
+ * We should only use it in 7-bit ASCII places like in the protocol. In
+ * the Windows API they are called stri(n)cmp, so we have to map them
+ * anyway.
+ */
+
+#if !defined HAVE_STRCASECMP
+
+#include <ctype.h>		/* for tolower */
+
+int wolf_port_strcasecmp( const char *s1, const char *s2 ) {
+	int c1, c2;
+
+	do {
+		c1 = tolower( (unsigned char)*s1 );
+		c2 = tolower( (unsigned char)*s2 );
+		s1++;
+		s2++;
+	} while( c1 == c2 && c1 != '\0' && c2 != '\0' );
+
+	return( c2 > c1 ? -1 : c1 > c2 );
+}
+
+#endif /* !defined HAVE_STRCASECMP */
+
+#if !defined HAVE_STRNCASECMP
+
+#include <ctype.h>		/* for tolower */
+
+int wolf_port_strncasecmp( const char *s1, const char *s2, size_t n ) {
+	int c1, c2;
+
+	if( n == 0 )
+		return 0;
+
+	do {
+		c1 = tolower( (unsigned char)*s1 );
+		c2 = tolower( (unsigned char)*s2 );
+		s1++;
+		s2++;
+		n--;
+	} while( n > 0 && c1 == c2 && c1 != '\0' && c2 != '\0' );
+
+	return( c2 > c1 ? -1 : c1 > c2 );
+}
+
+#endif /* !defined HAVE_STRNCASECMP */