1 files changed, 22 insertions, 0 deletions
diff --git a/lib/darwin/read.c b/lib/darwin/read.c
new file mode 100644
index 0000000..2e5b746
--- /dev/null
+++ b/lib/darwin/read.c
@@ -0,0 +1,22 @@
+#include "darwin/read.h"
+bool read_leb128(void **ptr, void *end, bool is_signed, uint64_t *out) {
+    uint64_t result = 0;
+    uint8_t *p = *ptr;
+    uint8_t bit;
+    unsigned int shift = 0;
+    do {
+        if (p >= (uint8_t *) end)
+            return false;
+        bit = *p++;
+        uint64_t k = bit & 0x7f;
+        if (shift < sizeof(uint64_t) * 8)
+            result |= k << shift;
+        shift += 7;
+    } while (bit & 0x80);
+    if (is_signed && (bit & 0x40))
+        result |= ~((uint64_t) 0) << shift;
+    *ptr = p;
+    if (out)
+        *out = result;
+    return true;
+}