console: Fix warning from clang (and potential crash)

[qemu.git] / cutils.c

diff --git a/cutils.c b/cutils.c
index cb6f63848c111b03815a58a921c5fe2a9c5a2e7e..8ef648f4b928e794d54956088fed40969288f6fb 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;
@@ -376,85 +383,49 @@ int qemu_parse_fd(const char *param)
     return fd;
 }
 
-ssize_t iov_send_recv(int sockfd, struct iovec *iov,
-                      size_t offset, size_t bytes,
-                      bool do_sendv)
+int qemu_parse_fdset(const char *param)
 {
-    int iovlen;
-    ssize_t ret;
-    size_t diff;
-    struct iovec *last_iov;
-
-    /* last_iov is inclusive, so count from one.  */
-    iovlen = 1;
-    last_iov = iov;
-    bytes += offset;
-
-    while (last_iov->iov_len < bytes) {
-        bytes -= last_iov->iov_len;
+    return qemu_parse_fd(param);
+}
 
-        last_iov++;
-        iovlen++;
+/* 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;
+}
 
-    diff = last_iov->iov_len - bytes;
-    last_iov->iov_len -= diff;
-
-    while (iov->iov_len <= offset) {
-        offset -= iov->iov_len;
-
-        iov++;
-        iovlen--;
+/*
+ * 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;
     }
+}
 
-    iov->iov_base = (char *) iov->iov_base + offset;
-    iov->iov_len -= offset;
-
-    {
-#if defined CONFIG_IOVEC && defined CONFIG_POSIX
-        struct msghdr msg;
-        memset(&msg, 0, sizeof(msg));
-        msg.msg_iov = iov;
-        msg.msg_iovlen = iovlen;
-
-        do {
-            if (do_sendv) {
-                ret = sendmsg(sockfd, &msg, 0);
-            } else {
-                ret = recvmsg(sockfd, &msg, 0);
-            }
-        } while (ret == -1 && errno == EINTR);
-#else
-        struct iovec *p = iov;
-        ret = 0;
-        while (iovlen > 0) {
-            int rc;
-            if (do_sendv) {
-                rc = send(sockfd, p->iov_base, p->iov_len, 0);
-            } else {
-                rc = qemu_recv(sockfd, p->iov_base, p->iov_len, 0);
-            }
-            if (rc == -1) {
-                if (errno == EINTR) {
-                    continue;
-                }
-                if (ret == 0) {
-                    ret = -1;
-                }
-                break;
-            }
-            if (rc == 0) {
-                break;
-            }
-            ret += rc;
-            iovlen--, p++;
+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;
         }
-#endif
+        *n |= *in++ << 7;
+        return 2;
     }
-
-    /* Undo the changes above */
-    iov->iov_base = (char *) iov->iov_base - offset;
-    iov->iov_len += offset;
-    last_iov->iov_len += diff;
-    return ret;
 }