kvmvapic: Disable if there is insufficient memory

[qemu.git] / cutils.c

diff --git a/cutils.c b/cutils.c
index e2bc1b89df1ebab2e4cc0bd77e1d8a43f35be9f2..ee4614d3786a604a1a287d8e9f6ad462023d43c8 100644 (file)
--- a/cutils.c
+++ b/cutils.c
@@ -28,6 +28,13 @@
 #include "qemu_socket.h"
 #include "iov.h"
 
+void strpadcpy(char *buf, int buf_size, const char *str, char pad)
+{
+    int len = qemu_strnlen(str, buf_size);
+    memcpy(buf, str, len);
+    memset(buf + len, pad, buf_size - len);
+}
+
 void pstrcpy(char *buf, int buf_size, const char *str)
 {
     int c;
@@ -375,3 +382,45 @@ int qemu_parse_fd(const char *param)
     }
     return fd;
 }
+
+/* round down to the nearest power of 2*/
+int64_t pow2floor(int64_t value)
+{
+    if (!is_power_of_2(value)) {
+        value = 0x8000000000000000ULL >> clz64(value);
+    }
+    return value;
+}
+
+/*
+ * Implementation of  ULEB128 (http://en.wikipedia.org/wiki/LEB128)
+ * Input is limited to 14-bit numbers
+ */
+int uleb128_encode_small(uint8_t *out, uint32_t n)
+{
+    g_assert(n <= 0x3fff);
+    if (n < 0x80) {
+        *out++ = n;
+        return 1;
+    } else {
+        *out++ = (n & 0x7f) | 0x80;
+        *out++ = n >> 7;
+        return 2;
+    }
+}
+
+int uleb128_decode_small(const uint8_t *in, uint32_t *n)
+{
+    if (!(*in & 0x80)) {
+        *n = *in++;
+        return 1;
+    } else {
+        *n = *in++ & 0x7f;
+        /* we exceed 14 bit number */
+        if (*in & 0x80) {
+            return -1;
+        }
+        *n |= *in++ << 7;
+        return 2;
+    }
+}