1 files changed, 60 insertions, 0 deletions
diff --git a/contrib/syslinux-4.02/com32/lib/strspn.c b/contrib/syslinux-4.02/com32/lib/strspn.c
new file mode 100644
index 0000000..abbbf17
--- /dev/null
+++ b/contrib/syslinux-4.02/com32/lib/strspn.c
@@ -0,0 +1,60 @@
+/*
+ * strspn, strcspn
+ */
+
+#include <string.h>
+#include <stddef.h>
+#include <inttypes.h>
+#include <limits.h>
+
+#ifndef LONG_BIT
+#define LONG_BIT (CHAR_BIT*sizeof(long))
+#endif
+
+static inline void set_bit(unsigned long *bitmap, unsigned int bit)
+{
+    bitmap[bit / LONG_BIT] |= 1UL << (bit % LONG_BIT);
+}
+
+static inline int test_bit(unsigned long *bitmap, unsigned int bit)
+{
+    return (int)(bitmap[bit / LONG_BIT] >> (bit % LONG_BIT)) & 1;
+}
+
+static size_t strxspn(const char *s, const char *map, int parity)
+{
+    unsigned long matchmap[((1 << CHAR_BIT) + LONG_BIT - 1) / LONG_BIT];
+    size_t n = 0;
+
+    /* Create bitmap */
+    memset(matchmap, 0, sizeof matchmap);
+    while (*map)
+	set_bit(matchmap, (unsigned char)*map++);
+
+    /* Make sure the null character never matches */
+    if (parity)
+	set_bit(matchmap, 0);
+
+    /* Calculate span length */
+    while (test_bit(matchmap, (unsigned char)*s++) ^ parity)
+	n++;
+
+    return n;
+}
+
+size_t strspn(const char *s, const char *accept)
+{
+    return strxspn(s, accept, 0);
+}
+
+size_t strcspn(const char *s, const char *reject)
+{
+    return strxspn(s, reject, 1);
+}
+
+char *strpbrk(const char *s, const char *accept)
+{
+    const char *ss = s + strxspn(s, accept, 1);
+
+    return *ss ? (char *)ss : NULL;
+}