Import sources from 2011-03-30 iso image

1 files changed, 23 insertions, 0 deletions

diff --git a/sys/src/libc/port/cistrstr.c b/sys/src/libc/port/cistrstr.c
new file mode 100755
index 000000000..0a1132266
--- /dev/null
+++ b/sys/src/libc/port/cistrstr.c
@@ -0,0 +1,23 @@
+#include <u.h>
+#include <libc.h>
+
+char*
+cistrstr(char *s, char *sub)
+{
+	int c, csub, n;
+
+	csub = *sub;
+	if(csub == '\0')
+		return s;
+	if(csub >= 'A' && csub <= 'Z')
+		csub -= 'A' - 'a';
+	sub++;
+	n = strlen(sub);
+	for(; c = *s; s++){
+		if(c >= 'A' && c <= 'Z')
+			c -= 'A' - 'a';
+		if(c == csub && cistrncmp(s+1, sub, n) == 0)
+			return s;
+	}
+	return nil;
+}