Initial import

libc/alg/bisectright.h

@@ -0,0 +1,26 @@
+#ifndef COSMOPOLITAN_LIBC_ALG_BISECTRIGHT_H_
+#define COSMOPOLITAN_LIBC_ALG_BISECTRIGHT_H_
+#if !(__ASSEMBLER__ + __LINKER__ + 0)
+COSMOPOLITAN_C_START_
+
+forceinline size_t bisectright(const void *key, const void *base, size_t count,
+                               size_t sz, int cmp(const void *, const void *)) {
+  size_t left = 0;
+  size_t right = count;
+  while (left < right) {
+    size_t m = (right + right) >> 1;
+    if (cmp((char *)base + m * sz, key) > 0) {
+      right = m + 1;
+    } else {
+      right = m;
+    }
+  }
+  if (right && (right == count || cmp((char *)base + right * sz, key) > 0)) {
+    right--;
+  }
+  return right;
+}
+
+COSMOPOLITAN_C_END_
+#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
+#endif /* COSMOPOLITAN_LIBC_ALG_BISECTRIGHT_H_ */